Table of Contents


UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
(Mark One)
xANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 20162021
OR
oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from _____ to _____
Commission File No.Number: 001-36296
Eleven Biotherapeutics,Sesen Bio, Inc.
(Exact name of registrant as specified in its charter)
DELAWAREDelaware26-2025616
(State or other jurisdiction of

incorporation or organization)
(I.R.S. Employer

Identification No.)
245 First Street, Suite 1800
Cambridge, MA
02142
(Address of principal executive offices)(Zip code)Code)
Registrant’s telephone number, including area code: code(617) 444-8550
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Stock, $0.001 par value $0.001 per shareNASDAQSESNThe Nasdaq Global Market
Securities registered pursuant to Section 12(g) of the Act:
None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. oYes x No
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. oYes x No
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. xYes o No
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). xYes o No
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  x
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer”,filer," “accelerated filer”filer,” “smaller reporting company,” and “smaller reporting“emerging growth company” in Rule 12b-2 of the Exchange Act.
Large Acceleratedaccelerated fileroAccelerated filero
Non-accelerated filer
o (Do not check if a smaller reporting company)
Smaller reporting companyx
Accelerated filerEmerging growth company
Non-accelerated filer
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act.):    oAct). Yes x No
AsThe aggregate market value of common stock held by non-affiliates of the registrant, computed by reference to the closing price of the common stock on the Nasdaq Global Market on June 30, 2016,2021, the last business day of the registrant’sregistrant's most recently completed second fiscal quarter, the aggregate market valuewas approximately $870.7 million.
There were 199,463,645 shares of the Common Stock heldregistrant's common stock outstanding as ofFebruary 21, 2022.

Documents Incorporated by non-affiliates of the registrant was approximately $18.9 million, based on the closing priceReference
Portions of the registrant’s common stockDefinitive Proxy Statement relating to the 2022 Annual Meeting of Stockholders ("2022 Proxy Statement"), which will be filed with the Securities and Exchange Commission within 120 days after the end of the registrant’s fiscal year ended December 31, 2021, are incorporated by reference into Part III of this Annual Report on June 30, 2016.
Number of outstanding shares of Common Stock as March 23, 2017: 24,700,746
Form 10-K.




ELEVEN BIOTHERAPEUTICS,


SESEN BIO, INC.
TABLE OF CONTENTSAnnual Report on Form 10-K for the Fiscal Year ended December 31, 2021
Table of Contents
Page
Forward-looking Statements
Risk Factors Summary
PART I
Item 1.Business.
Item 1A.Risk Factors.
Item 1B.Unresolved Staff Comments.
Item 2.Properties.
Item 3.Legal Proceedings.
Item 4.Mine Safety Disclosures.
PagePART II
Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.
Item 5.Securities.
Item 6.[Reserved.]
Item 7.Operations.
Item 7A.Risk.
Item 8.Data.
Item 9.Disclosure.
Item 9A.Procedures.
Item 9B.Other Information.
Item 9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.
PART III
Item 10.Governance.
Item 11.Executive Compensation.
Item 12.Matters.
Item 13.Independence.
Item 14.Services.
PART IV
Item 15.Schedules.
Item 16.Form 10-K Summary.



Unless the context otherwise requires, all references in this Annual Report on Form 10-K to "Sesen," the “Company,” “we,” “us,” and “our” include Sesen Bio, Inc. and its subsidiaries.
i




FORWARD-LOOKING STATEMENTS
This Annual Report on Form 10-K contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this Annual Report on Form 10-K, including statements regarding our strategy, future operations, future product research or development, future financial position, future revenues, projected costs, prospects, plans and objectives of management, are forward-looking statements. The words “anticipate,” “believe,” “goals,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “predict,” “project,” “target,” “potential,” “will,” “would,” “could,” “should,” "contemplate," “continue” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.
The forward-looking statements in this Annual Report on Form 10-K include, among other things, statements about:
our plans and ability to resolve the issues identified in the complete response letter (“CRL”) we received from the US Food and Drug Administration (“FDA”) regarding our Biologics License Application (“BLA”) for Vicineum™ for the treatment of bacillus Calmette-Guérin (“BCG”)-unresponsive non-muscle invasive bladder cancer (“NMIBC”);
our plans and ability to resolve the concerns identified in the European Medicines Agency’s (“EMA”) Withdrawal Assessment Report related to our marketing authorization application (“MAA”) for Vysyneum™ (the “EMA Withdrawal Report”);
our belief that we have a clear understanding of what additional information regarding chemistry, manufacturing and controls ("CMC") is required for potential resubmission of a BLA for Vicineum;
our ability to utilize Vicineum manufactured during process validation for any future clinical trials needed to address issues raised in the CRL, including an additional Phase 3 clinical trial, and that any such future clinical trials can proceed while addressing CMC issues raised in the CRL;
our expectation to discuss the study protocol for an additional Phase 3 clinical trial for Vicineum for the treatment of non-muscle invasive carcinoma in situ (“CIS”) of the bladder in patients previously treated with adequate or less than adequate BCG in a Type C Meeting with the FDA scheduled for March 28, 2022 (“Type C Meeting”);
our expectations regarding an additional Phase 3 clinical trial for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG to address questions related to clinical matters raised in the CRL;
our intentions to use the information from the Type A Meetings following the CRL we received regarding our BLA for Vicineum to determine the appropriate path forward with regulators;
our plans and ability to resubmit a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG to the FDA following the issuance of the CRL by the FDA, and if approved by the FDA, our ability to commercialize Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
our plans and ability to resume pursuing regulatory approval of Vysyneum (the proprietary brand name that was conditionally approved by the EMA for oportuzumab monatox in the European Union) of BCG-unresponsive NMIBC in the European Union when there is more clarity from the FDA on next steps for Vicineum in the US;
our intentions to work closely with the FDA to understand next steps for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG in the US;
our intentions to work closely with the EMA to understand next steps for Vysyneumfor the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG in the European Union;
the potential impact of the COVID-19 pandemic on our business;
our expected future loss and accumulated deficit levels;
the difficulties and expenses associated with obtaining and maintaining regulatory approval of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG in the United States, the European Union and other non-US jurisdictions, and the labeling under any approval we may obtain;
our projected financial position and estimated cash burn rate;
our belief that we will have sufficient future cash flows from additional geographic regions outside the US to support the value of our goodwill and EU indefinite-lived, acquired in-process research and development ("IPR&D");
our plans to continue to evaluate timelines for commercialization and probability of success of development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
our estimations regarding any remeasurement of contingent consideration liability in the future;
ii


our estimations regarding any potential impairment to our goodwill and indefinite-lived intangible asset in the future;
our estimates regarding expenses, future revenues, capital requirements and needs for, and ability to obtain, additional
financing;
our ability to continue as a going concern;
our need to raise substantial additional capital to fund our operations;
the success, cost and timing of our pre-clinical studies and clinical trials in the United States Canada and in other foreign non-US
jurisdictions;
the potential enrollment challenges to our Phase 3 clinical trial of Vicinium due to anticipated shortages of Bacillus Calmette-Guérin, or BCG;
the potential that results of pre-clinical studies and clinical trials indicate our product candidates are unsafe or ineffective;
our dependence on third parties, including contract research organizations or CROs,(“CROs”) in the conduct of our pre-clinical studies and clinical trials;trials, including an additional Phase 3 clinical trial for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
the difficultiestiming and expensescosts associated with obtainingour manufacturing process and maintaining regulatory approvaltechnology transfer to Qilu Pharmaceutical Co., Ltd. (“Qilu”) for the production of Vicineum drug substance and drug product, and our product candidates and companion diagnostics, if any, in the United States, Canada and in other foreign jurisdictions, and the labeling under any approval we may obtain;
our plans and abilityreliance on Qilu to develop and commercialize our product candidates;
our ability to achieve certain future regulatory, development and commercialization milestonesperform under our license agreement which we refer to as the License Agreement, with F. Hoffmann-La Roche Ltd and Hoffmann La-Roche Inc., or collectively, Roche;Qilu;
market acceptance of our product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
the size and growth of the potential markets for our product candidates, and our ability to serve those markets;
obtainingour ability to obtain and maintainingmaintain intellectual property protection for our product candidates and our proprietary technology;
our strategic operating plan to sublicense Vicineum for the successfultreatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG to business development partners in all regions outside the US, including the European Union, to earn a potential combination of upfront, milestone, and royalty payments, and the business development partner to bear the majority of regulatory and commercialization costs;
our belief that the probability of success of future approval in the European Union for Vysyneum increases if FDA approval for Vicineum has already been obtained;
our beliefs regarding key advantages of our targeted fusion protein therapeutics (“TFPT”) platform;
our expectation that Vicineum may work via a dual mechanism of action to directly kill cancer cells and activate a local inflammatory process that stimulates T-cells, which then proliferate and destroy the cancer cells;
our expectation that there may be potential for a synergistic effect when Vicineum is given in combination with checkpoint inhibitors;
our expectations regarding the amount and timing of milestone and royalty payments pursuant to our out-license agreements and OUS business development partnership agreements, including our license agreement with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (collectively, “Roche”), (the “Roche License Agreement”) and our exclusive license agreement with Qilu for the development, manufacture and commercialization capabilities, including salesof Vicineum in China, Hong Kong, Macau and marketing capabilities;Taiwan ("Greater China");
our ability to regain compliance with Nasdaq’s minimum bid price requirement;
our plans to seek additional OUS business development partnerships; and
the success of competing therapies and products that are or become available.
The forward-looking statements in this Annual Report on Form 10-K are only predictions. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our business, financial condition and results of operations. These forward-looking statements speak only as of the date of this Annual Report on Form 10-K and involve known and unknown risks, uncertainties, assumptions and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, among others, the following:
we may not be able to resolve the issues raised in the CRL we received from the FDA regarding our BLA for Vicineum for the treatment of BCG-unresponsive NMIBC;
we may not be able to resolve the concerns identified in the EMA Withdrawal Assessment Report;
we may not determine a viable path forward for continued clinical development of Vicineum, which would prevent us from resubmitting a BLA for Vicineum;
we may not achieve profitable operations or access needed capital;
we may experience delays or difficulties related to the continued clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, including delays in clinical trial sites receiving the supplies and materials needed to conduct clinical trials, difficulties
iii


in recruiting clinical site investigators and clinical site staff and difficulties in enrolling patients or treating patients in active trials due to COVID-19 or otherwise;
clinical trials of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, including an additional Phase 3 clinical trial for Vicineum, or any of our other product candidates, may not demonstrate safety and efficacy to the satisfaction of the FDA, EMA or other non-US regulatory authorities or otherwise produce favorable results;
we may not obtain marketing approval of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG in the United States, the European Union or other non-US jurisdictions;
Vicineum may not gain market acceptance for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG in the United States, the European Union or other non-US jurisdictions;
the market opportunity for Vicineum may be limited to those patients who are ineligible for established therapies or for
whom prior therapies have failed;
we may experience issues or delays with third-party disposition, labelling and packaging of clinical supply of Vicineum;
our competitors may discover, develop or commercialize products before, or more successfully than, we do;
we may be unable to obtain, maintain, defend and enforce patent claims and other intellectual property rights;
we may be unable to defend against pending or threatened litigation, which may be costly and time-consuming;
we may fail to comply with all regulatory requirements or experience unanticipated problems with our products;
we may recognize impairment of our goodwill and indefinite-lived intangible asset;
we may not meet the Nasdaq minimum bid price requirement during any compliance period or in the future;
we may not be granted relief from delisting from Nasdaq if necessary; and
such other factors described in “Item 1A. Risk Factors” and “Item 5. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this Annual Report on Form 10-K.
Our product candidates are investigational biologics undergoing clinical development and have not been approved by the U.S. Food and Drug Administration,FDA, EMA or other comparable non-US regulatory authorities. On August 13, 2021, we received a CRL from the FDA Health Canada, orindicating that the FDA had determined that it could not approve the BLA for Vicineum in its present form. On August 20, 2021, we withdrew our MAA to the EMA for Vysyneum for the treatment of BCG-unresponsive NMIBC in order to pause our plans to pursue regulatory approval of Vysyneum in the European Commission, or submitted toUnion until there is more clarity from the FDA Health Canada oron next steps for Vicineum in the European Medicines Agency, or EMA, as partUnited States. In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the approval process. Our product candidates have notrequirements for potential resubmission of a BLA. A Type C Meeting has been nor may they ever be, approved by any regulatory agencyscheduled with the FDA for March 28, 2022 in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or competent authorities nor marketed anywhere in the world.less than adequate BCG.
We may not actually achieve the plans, intentions or expectations disclosedThe events and circumstances reflected in our forward-looking statements may not be achieved or occur and our stockholders should not place undue reliance on our forward-looking statements. Actualactual results or events could differ materially from the plans, intentions and expectations disclosedthose projected in the forward-looking statements we make. We have included important factors in the cautionary statements included in this Annual Report on Form 10-K, particularly in the “Risk Factors” section, that could cause actual results or events to differ materially from the forward-looking statements that we make. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments we may make.
statements. You should read this Annual Report on Form 10-K and the documents that we have filed as exhibits to this Annual Report on Form 10-K completely and with the understanding that our actual future results may be materially different from what we expect. Moreover, we operate in an evolving environment. New risk factors and uncertainties may emerge from time to time, and it is not possible for us to predict all risks and uncertainties. The forward-looking statements contained in this Annual Report on Form 10-K are made as of the date of this Annual Report on Form 10-K, and10-K. Except as required by applicable law, we do not assume any obligationplan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise.
Unless the context otherwise exceptrequires, all references in this Annual Report on Form 10-K to the “Company,” “Sesen,” “we,” “us,” and “our” include Sesen Bio, Inc. and its subsidiaries.

iv



Risk Factors Summary
The following summarizes the principal factors that make an investment in us speculative or risky, all of which are more fully described in “Item 1A. Risk Factors” below. This summary should be read in conjunction with “Item 1A. Risk Factors” and should not be relied upon as required by applicable law.an exhaustive summary of the material risks facing our business.

Risks Related to Our Financial Position and Need for Additional Capital
We have incurred significant losses since our inception and anticipate that we will continue to incur losses for the foreseeable future.
With the exception of specified regulatory, development and commercial milestones under our out-licensing and OUS business development partnership agreements, we currently have no source of revenue and may never become profitable.
We will need substantial additional funding. If we are unable to raise capital when needed, we could be forced to delay, reduce or eliminate our product development programs or commercialization efforts.
Risks Related to Clinical Development and Regulatory Approval of Vicineum
We are dependent on our lead product candidate, Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. If we are unable to obtain marketing approval for or successfully commercialize our lead product candidate, either alone or through an out-license or an OUS business development partnership, or experience significant delays in doing so, our business could be materially harmed.
If additional clinical trials of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG fail to demonstrate safety and efficacy to the satisfaction of the FDA, the EMA or other non-US regulatory authorities or do not otherwise produce favorable results, we will be unable to complete the development and potential commercialization of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
We may not be able to develop a more sensitive bioanalytical assay which is needed for the additional Phase 3 clinical trial for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
If we experience any of a number of possible unforeseen events in connection with our clinical trials, potential marketing approval or commercialization of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG could be delayed or prevented.
If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of necessary regulatory approvals could be delayed or prevented.
Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG may cause undesirable side effects, serious adverse events or have other properties that could delay or halt clinical trials, delay or prevent its regulatory approval, limit the commercial profile of its labeling, if approved, or result in significant negative consequences following any marketing approval.
We will need to obtain regulatory authority approval of any proposed names for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and any failure or delay associated with such naming approval may adversely impact our business.
The marketing approval process is expensive, time-consuming and uncertain. As a result, we cannot predict when or if we, or any licensees or partners, will obtain marketing approval to commercialize Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG or any other product candidate.
Failure to obtain marketing approval in non-US jurisdictions would prevent our product candidates from being marketed abroad, and any approval we are granted for our product candidates in the United States would not assure approval of product candidates in non-US jurisdictions.
Product liability lawsuits against us could cause us to incur substantial liabilities and to limit commercialization of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved.
We face substantial competition, which may result in others discovering, developing or commercializing products before or more successfully than we do.
Risks Related to Our Dependence on Third Parties
v


We will depend on Qilu for the development and commercialization of Vicineum in Greater China.
We rely on third parties to conduct our pre-clinical studies and clinical trials. If these third parties do not successfully carry out their contractual duties or meet expected deadlines, we may not be able to obtain regulatory approval for or commercialize our product candidates.
We are dependent on third parties to formulate and manufacture Vicineum, which exposes us to a number of risks that may delay development, regulatory approval and commercialization of our products or result in higher product costs.
Risks Related to Our Intellectual Property
If we are unable to obtain and maintain patent protection for our technology and products, or if our licensors are unable to obtain and maintain patent protection for the technology or products that we license from them, or if the scope of the patent protection obtained is not sufficiently broad, our competitors could develop and commercialize technology and products similar or identical to ours, and our ability to successfully commercialize our technology and products may be impaired.
We may become involved in lawsuits to protect or enforce our patents or other intellectual property, which could be expensive, time consuming and unsuccessful.
Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain and could have a material adverse effect on the success of our business.
Risks Related to Regulatory Compliance
Current and future legislation may increase the difficulty and cost for us to obtain marketing approval of our product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and affect the prices we may obtain.
Our failure to comply with data protection laws and regulations could lead to government enforcement actions and significant penalties against us, and adversely impact our operating results.
Risks Related to Our Business and Operations
The COVID-19 coronavirus could adversely impact our business.
Our future success depends on our ability to attract, retain and motivate qualified personnel.
We rely significantly on information technology and any failure, inadequacy, interruption or security lapse of that technology, including any cyber security incidents, could materially adversely affect our business.
We and certain of our officers have been named as defendants in three pending securities class action lawsuits and three related shareholder derivative lawsuits have been filed. These lawsuits, and potential similar or related lawsuits, could result in substantial damages, divert management’s time and attention from our business, and have a material adverse effect on our results of operations. These lawsuits, and any other lawsuits to which we are subject, will be costly to defend and are uncertain in their outcome.
Our employees may engage in misconduct or other improper activities, including non-compliance with regulatory standards and requirements, which could cause significant liability for us and harm our reputation.
Risks Related to Ownership of Our Common Stock
If we are unable to regain compliance with the listing requirements of the Nasdaq Global Market, our common stock may be delisted from the Nasdaq Global Market which could have a material adverse effect on our business and could make it more difficult for you to sell your shares.
vi



PART I

Item 1.     Business.
Item 1.Business.
Overview
We are a biologics oncologylate-stage clinical company focused primarily on designing, engineering and developingadvancing targeted fusion protein therapeutics or TPTs. Our TPTs are single protein therapeutics composed("TFPTs") for the treatment of patients with cancer. We genetically fuse the targeting moieties genetically fused via linker domains toantibody fragment and the cytotoxic protein payloads that arepayload into a single molecule which is produced through our proprietary one-step, microbial manufacturing process. We target tumor cell surface antigens that allowwith limited expression on normal cells. Binding of the target antigen by the TFPT allows for rapid internalization into the targeted cancer cell and have limited expression on normal cells.cell. We have designed our TPTstargeted proteins to overcome the fundamental efficacy and safety challenges inherent in existing antibody drugantibody-drug conjugates or ADCs,("ADCs") where a payload is chemically attached to a targeting antibody.
Our most advanced product candidate, is ViciniumTM, whichVicineum, also known as VB4-845, is a locally-administered TPT. In the third quartertargeted fusion protein composed of 2015, we, through our recently acquired subsidiary, Viventia Bio Inc., or Viventia, commenced in the United States and Canadaan anti-epithelial cell adhesion molecule ("EpCAM") antibody fragment tethered to a Phase 3 clinical trialtruncated form of ViciniumPseudomonas exotoxin A for the treatment of subjects with high-grade non-muscle invasive CIS of the bladder cancer,in patients previously treated with adequate or NMIBC. We anticipate complete enrollment in this clinical trial in the second half of 2017 with topline data in 2018. Our second most advanced product candidate is ProxiniumTM, a locally-administered TPT intendedless than adequate BCG.
In December 2020, we submitted our completed BLA for Vicineum for the treatment of squamous cell carcinoma of the head and neck, or SCCHN. We intend to commence a Phase 1/2a clinical trial that will explore the potential of Proxinium with a checkpoint inhibitor for the treatment of SCCHN in the second half of 2017. We may explore additional therapeutic indications for Vicinium and Proxinium.
In addition to our locally-administered TPTs, our pipeline also includes systemically-administered TPTs in development. Our systemically-administered TPTs are built around our proprietary de-immunized variant of the plant-derived cytotoxin bouganin, or deBouganin. Our lead systemically-administered product candidate, VB6-845d, is being developed for the treatment of multiple types of epithelial cell adhesion molecule, or EpCAM, positive solid tumors. VB6-845d is administered by intravenous infusion. A Phase 1 clinical trial conducted with VB6-845, the prior version of VB6-845d, revealed no clinically relevant immune response to the deBouganin payload In April 2016, we submitted an investigational new drug application, or IND,BCG-unresponsive NMIBC to the FDA, which was accepted for filing by the FDA in preparationFebruary 2021. The FDA granted Priority Review for the BLA and set a target PDUFA date for a decision on the BLA of initiating a Phase 1/2 clinical trial of VB6-845d in subjects with EpCAM-positive cancers in the United States. The IND was withdrawn in July 2016 afterAugust 18, 2021.On August 13, 2021, we received initial feedbacka CRL from the FDA indicating that they had identified hold and non-hold deficiencies that needed to be addressed. In December 2016, we submitted a request for a pre-IND meeting to seek input on the manufacturing, nonclinical and clinical plans for VB6-845d prior to resubmitting an IND. In February 2017, the FDA had determined that it could not approve the BLA for Vicineum in its present form and provided guidance onrecommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality. On August 20, 2021, we withdrew our manufacturing and nonclinical plans for VB6-845d. Based on this guidance, we are performing additional studies and an updated IND submission is planned in the first quarter of 2018.
We maintain global development, marketing and commercialization rights for all of our TPT-based product candidates. Upon regulatory approval for our product candidates, we will explore various commercialization strategies to market our products. If we obtain regulatory approval for Vicinium in high-grade NMIBC, we may build a North American specialty urology sales force to market the product or seek commercialization partners. If we obtain regulatory approval for our other product candidates, including Proxinium, we may seek partners with oncology expertise in order to maximize the commercial value of each asset or a portfolio of assets. We also own or exclusively license worldwide intellectual property rights for all of our TPT-based product candidates, covering our key patents with protection ranging from 2018 to 2036. See ‘‘Business-Intellectual Property’’ for additional details.
On June 10, 2016, we entered into the License Agreement with Roche, pursuant to which we licensed our monoclonal antibody EBI-031 and all other IL-6 antagonist antibody technology owned by us. Under the License Agreement, Roche is required to continue developing EBI-031 at its cost. At the time of the License Agreement, EBI-031, which was derived using our previous AMP-Rx platform, was in pre-clinical development as an intravitreal injection for diabetic macular edema and uveitis. We have received $30.0 million in payments from Roche pursuantMAA to the License Agreement, including a $7.5 million upfront payment and a $22.5 million milestone payment as a result of the IND applicationEMA for EBI-031 becoming effective.  We are also entitled to receive an additional $240.0 million upon the achievement of other specified regulatory, development and commercial milestones, as well as royalties based on net sales of potential future products containing EBI-031 or any other potential future products containing other IL-6 compounds.
We also previously invested a significant portion of our efforts and financial resources in the development of our product candidate isunakinra (EBI-005)Vysyneum for the treatment of subjectsBCG-unresponsive NMIBC in order to pause our plans to pursue regulatory approval of Vysyneum in the European Union until there is more clarity from the FDA on next steps for Vicineum in the United States. Vysyneum is the proprietary brand name that was conditionally approved by the EMA for oportuzumab monatox in the European Union. In October 2021, the EMA issued its Withdrawal Assessment Report relating to our MAA for Vysyneum, as is consistent with dry eye diseasethe EMA’s standard practice when an MAA is withdrawn. The EMA Withdrawal Assessment Report reflects the initial assessment and allergic conjunctivitis. Based oncorresponding questions from the EMA and identifies major objections in the areas of quality, good clinical practice, efficacy and safety. Due to the high concordance between FDA and European Commission approvals, we believe that the probability of success of future approval in the European Union for Vysyneum increases if FDA approval for Vicineum has already been obtained.

On October 29, 2021, we participated in a Type A Meeting with the FDA to discuss questions related to CMC raised in the CRL (the “CMC Type A Meeting”). During the CMC Type A Meeting, we and the FDA reviewed issues related to CMC to be further discussed during the review of a BLA for Vicineum upon potential resubmission. We believe we have a clear understanding of what additional information regarding CMC is required for a potential resubmission of a BLA. Additionally, although not an issue raised in the CRL, the FDA confirmed at the CMC Type A Meeting that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical trials. The FDA also confirmed that we can utilize Vicineum manufactured during process validation for any future clinical trials needed to address issues raised in the CRL, and that these potential trials can proceed while addressing CMC issues.
negative results from our completedOn December 8, 2021, we participated in a Type A Meeting with the FDA to discuss design elements of an additional Phase 3 clinical trials in dry eye diseasetrial for Vicineum (the “Clinical Type A Meeting”), which the FDA confirmed will be required for a potential resubmission of a BLA. The trial design may include these elements:
A randomized clinical trial assessing the safety and allergic conjunctivitis,efficacy of Vicineum compared to investigators’ choice of intravesical chemotherapy;
Trial may include both patients who have received adequate BCG1 and patients who have received less than adequate BCG;
The FDA encouraged us to submit the final results from the Phase 3 VISTA trial for Vicineum with a BLA resubmission.
1As per the 2018 FDA guidance on NMIBC, adequate BCG is defined as at least one of the following: (i) at least five of six doses of an initial induction course plus at least two of three doses of maintenance therapy or (ii) at least five of six doses of an initial induction course plus at least two of six doses of a second induction course.
On January 7, 2022, the FDA granted our request for a Type C Meeting to discuss the study protocol for an additional Phase 3 clinical trial that we do not plan to pursue further developmentconduct for potential resubmission of isunakinra.a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. The Type C Meeting has been scheduled for March 28, 2022.
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One of the items we expect to be discussed in the Type C Meeting is the patient population for the additional Phase 3 clinical trial, which may be different than the patient population studied in previous clinical trials for Vicineum for the treatment of NMIBC in two primary ways.
First, the additional Phase 3 clinical trial may include patients with only non-muscle invasive carcinoma in situ (CIS) of the bladder, and may not include patients with only papillary disease of the bladder. This change would lead to a smaller overall patient population than previously studied, as some of our past clinical trials of Vicineum in NMIBC have included patients with CIS or high-grade papillary disease of the bladder.
Second, the additional Phase 3 clinical trial may include patients who have received less than adequate BCG in addition to those who have received adequate BCG, per the FDA’s guidance. Receipt of less than adequate BCG could be due to (i) failure of, or intolerance to, a BCG therapy prior to reaching the FDA’s definition of adequate BCG or (ii) supply shortages of BCG, among other reasons. This change would lead to a larger patient population than previously studied, as past clinical trials of Vicineum in NMIBC only included patients who had previously been treated with adequate BCG.
Potential changes related to the additional Phase 3 clinical trial for Vicineum will be discussed at the upcoming Type C Meeting with the FDA scheduled for March 28, 2022.
Our TPTTFPT Platform
Our current product candidates are based on our proprietary TPTTFPT platform and are focused on addressing areas of unmet medical need in cancer. Our novel TPTsTFPTs have been designed to overcome the efficacy and safety challenges of existing ADCs and are being developed for both local and systemic administration.systemic-administration. Our TPTsTFPTs are single protein therapeutics composed of targeting moietiesdomains genetically fused via linker domainspeptide linkers to cytotoxic protein payloads that are produced through our proprietary recombinant one-step, microbial manufacturing process. Our TPTTFPT platform uses protein binding antibody fragments, which include fragment antigen binding domains, or Fabs, single chain variable domains or scFvs,("ScFvs"), and non-covalent scFv dimers or diabodies,("diabodies"), derived from the domains of antibodies that confer antigen recognition. We select antibody fragments for our product candidates depending upon the target therapeutic indication. We target tumor cell surface antigens that allow for rapid internalization into the targeted cancer cell and that also have limited expression in normal cells. For local administrations, we utilize an immunogenic cytotoxic protein payload designed to both target cancer cells and promote a heightened local immune response against the tumor. For systemic administrations,systemic-administrations, we use deBouganin, a deBouganinplant-derived, protein payload of reduced immunogenic potential that we believe can be repeatedly administered via infusion without the generation of an efficacy-limiting immune response against the payload.
Locally-administered TPTsTFPTs
We utilize our TPTsTFPTs with immunogenic cytotoxic protein payloads for tumors that can be targeted locally rather than systemically. Local administration allows for the TPTTFPT to reach the tumor without being cleared by the immune system, which enables us to maximize the concentration of TPTsTFPTs directly to tumors. Our locally-administered TPTs, includingTFPT Vicineum, which is our lead product candidates Vicinium and Proxinium, containcandidate in development for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, contains a targeting moietyantibody binding domain that is designed to bind to EpCAM, which is a protein over-expressed in many cancers. This targeting moietybinding domain is genetically fused to a truncated form of exotoxin A or ETA,("ETA"), which is an immunogenic cytotoxic protein payload that is produced by the bacterial species Pseudomonas. ThesePseudomonas. This product candidates arecandidate is designed to bind to EpCAM on the surface of cancer cells. The TPT-EpCAMTFPT-EpCAM complex is subsequently internalized into the cell and, once inside the cell, the TPTTFPT is cleaved by a cellular enzyme to release the cytotoxic protein payload, thus enabling cancer cell-killing.cell killing.
We also believe that our TPTsTFPTs designed for local administration may not only directly kill cancer cells through a targeted delivery of a cytotoxic protein payload, but also potentiate an anti-cancer therapeutic immune response in cancer cells near the site of administration.response. This immune response is believed to be triggered by both the immunogenic cell death of the cancer cells due to our payloads’payload's mechanism of action and the subsequent release of tumor antigens and the immunologically active setting created by the nature of the cytotoxic protein payloads. We believe that this immune response may also enhance the action of checkpoint inhibitors, whichthat require a pre-existing immune response for maximum efficacy.
Our most advanced locally-administered TFPT product candidates are Vicinium and Proxinium,candidate is Vicineum, in development for the treatment of high-grade NMIBCnon-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and recurrent, locally advanced or metastatic EpCAM-expressing SCCHN, respectively. These TPTs aresquamous cell carcinoma of the head and neck ("SCCHN"). This TFPT is not, however, suitable for systemic administrationsystemic-administration over multiple doses because the body’s immune system would recognize and eliminate foreign proteins, such as ETA, prior to their reaching targeted cancer cells.
Systemically-administered TPTsTFPTs
We also utilize our TPTsTFPTs with a de-immunized payload where systemic administrationsystemic-administration is required. Our systemically-administered TPTs currently in developmentTFPTs are built around deBouganin. Since the body’s immune system naturally recognizes and attempts to
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eliminate foreign proteins, we designed our systemically administered TPTssystemically-administered TFPTs with a deBouganin payload to avoid inducing an immunogenic response. DeBouganin is constructed by mutating the immunogenic T-cell epitopes from bouganin so that they are not recognized as foreign by the immune system. However, we also believe that deBouganin may enhance the action of checkpoint inhibitors as a result of the promotion of a local tumor immune response following the death of cancer cells. Our systemically-administered product candidate is VB6-845d for the treatment of multiple types of EpCAM-positive solid tumors.
Our Differentiated Approach to Targeted Therapies
We believe that our TPT constructTFPT platform will address many challenges experienced with existing ADCs. The basic construct for our TPTsTFPTs and existing ADCs is similar as each is comprised of a targeting moietydomain that specifically binds to cancer cells and delivers a cytotoxic payload. However, existing ADCs have been associated with limitations that we believe are addressed by our TPTs.

TFPTs.
Limitations of existingExisting ADC approachesApproaches to treating tumorsTreating Tumors
We believe existing ADCs have the following fundamental efficacy and safety challenges:
Deliver insufficient drug to tumors. Existing ADCs utilize full-length antibodies, which, due to their large size, have a reduced ability to penetrate tumors, thereby potentially reducing their efficacy.
Inability to kill a broad array of cancer cells within a tumor. Subsets of cancer cells within tumors may have mechanisms to resist and not be responsive to the cytotoxic payloads, or small molecule chemotherapies, used in existing ADCs.
Off-target toxicities due to unstable chemical linkage between targeting antibody and cytotoxic payload. Existing ADCs utilize chemical linkage strategies to join antibodies to small molecule cytotoxic payloads. While in the circulatory system, these chemical linkages can break and release free cytotoxic payloads in the circulation. These free small molecule cytotoxic payloads are not targeted and cannot discriminate between dividing cancer cells and non-cancerous cells, thus resulting in increased off-target toxicities.
Limited combination therapy potential. The release of free cytotoxic payloads in the tumor region can result in toxicity to immune cells that attack tumors. This effect on anti-tumor immune cellsAdverse events may limit the potential utility of existing ADCs in combination therapies including those employingwith immune checkpoint inhibitors.
inhibitors which have their own adverse events, including immune-related adverse events.
Complex and challenging manufacturing process. The multi-step manufacturing process of existing ADCs creates a non-homogeneous product that limits efficacy and drives greater costs than those estimated for our manufacturing process.
Advantages of our TPT platformTFPT Platform
We believe TPTsour TFPTs offer the following key advantages:
Deliver a greater amount of drug to tumors. Our TPTsTFPTs are designed using smaller targeting proteins that have an increased ability to exit the circulatory system and have binding properties designed to enable deeper penetration into targeted tumors, and we believe this will increase efficacy.
Ability to kill a broader array of cancer cells within a tumor. Our novel cytotoxic payloads consist of proteins rather than small molecule cytotoxic payloads. We believe the larger size of our cytotoxic protein payloads helps circumvent multi-drug resistance mechanisms that can make certain cancer cells resistant to small molecule cytotoxic payloads. By contrast to existing ADCs, which employ cytotoxic payloads that inhibit cellular replication and are effective at killing rapidly proliferating cancer cells, our cytotoxic protein payloads inhibit protein synthesis and are designed to kill not only rapidly proliferating, but also slowly growing cancer cells includeincluding tumor progenitor cells/cancer stem-like cells.
Increase safety due to a more stable linkage between targeting protein and cytotoxic payload. Our single protein molecules are designed to remain intact until they reach the inside of the cancer cell and to not release free cytotoxins into the circulatory system, thereby minimizing off-target toxicity.
Promote a therapeutic immune response. We believe that the potent TPTTFPT toxin-mediated killing of cancer cells in this immunologically active setting leads to the efficient presentation of cancer antigens to the immune system, thereby promoting an anti-tumor cellular immune response. Our locally-administered TPTsTFPTs utilize an immunogenic cytotoxic payload that we believe promotes a heightened immune response in the local tumor environment.
Potential combination with checkpoint inhibitors. We believe that the potential effect of checkpoint inhibitors, which are antibodies that promote the action of anti-tumor T-cells by blocking inhibitory ligand/receptor interactions that include PD-1 and PD-L1, may be enhanced when used in combination with other agents. We believe that, by mediating specific killing of tumor cells and promoting anti-tumor immune responses, our TPTs,TFPTs, while potentially effective on their own, may complement checkpoint inhibitors. In particular, we believe that our the
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use of our cytotoxin payload ETA, which promotes an immune response in the local tumor environment,induces immunogenic cell death, may facilitate the presentation of tumor cell surface antigens following the death of cancer cells, thereby providing a tumor immune response to enhance the action of checkpoint inhibitor therapies.
Utilize a simpler and more efficient manufacturing process. Our proprietary recombinant one-step manufacturing process creates a homogeneous product that we believe will improve efficacy and result in lower manufacturing costs.

Our Strategy
We are committed to designing, engineering, developing and commercializing TPTsTFPTs to identify and address oncology indications that suffer from a high unmet medical need. The key elements of our strategy are as follows:
Rapidly advance Vicinium through clinical development and obtain regulatory approval. Based upon our September 2014 end of Phase 2 meeting with the FDA, in the third quarter of 2015, we, through our recently acquired subsidiary Viventia, commenced an open-label, non-randomized Phase 3 clinical trial of Vicinium in subjects with high-grade NMIBC in the United States and Canada. In November 2016, the FDA provided draft guidance regarding appropriate clinical trial design for new therapies for NMIBC, including the use of single-arm studies. We believe that our Phase 3 clinical trial design is consistent with the FDA’s draft guidance. We anticipate complete enrollment of this Phase 3 clinical trial in the second half of 2017, and we expect to report top-line data in 2018. If this Phase 3 clinical trial is successful, we intend to pursueObtain regulatory approval initially in the United States and Canada. Assuming that we receive positive data in our Phase 3 clinical trial, we intend to initiate discussions with the EMA regarding a regulatory pathway for European Union, or E.U., approval.
Rapidly advance Proxinium through clinical development and obtain regulatory approval. We intend to initiate a Phase 1/2a clinical trial of Proxinium in combination with a checkpoint inhibitor in the second half of 2017. We anticipate that the Phase 1/2a clinical trial will explore the potential for Proxinium, due to its potential immunogenic effect, to enhance checkpoint inhibitors in combination therapyVicineum for the treatment of EpCAM-expressing SCCHN. non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. In prior Phase 1 and Phase 2 clinical trials, Proxinium demonstrated anti-tumor activity in 53% of evaluable subjects with EpCAM-expressing tumors as assessed by investigator’s clinical measurements, investigator’s overall assessment including qualitative changes, and assessment of available radiologic data.
Advance our systemically-administered product candidate, VB6-845d. In April 2016,December 2020, we submitted an INDour completed BLA for Vicineum to the FDA for the treatment of BCG-unresponsive NMIBC, which was accepted for filing by the FDA in preparationFebruary 2021. The FDA granted Priority Review for the BLA and set a target PDUFA date for a decision on the BLA of initiating a Phase 1/2 clinical trial of VB6-845d in subjects with EpCAM-positive cancers in the United States. The IND was withdrawn in July 2016 afterAugust 18, 2021. On August 13, 2021, we received initial feedbacka CRL from the FDA indicating that theythe FDA had identified holddetermined that it could not approve the BLA for Vicineum in its present form. On August 20, 2021, we withdrew our MAA to the EMA for Vysyneum for the treatment of BCG-unresponsive NMIBC in order to pause our plans to pursue regulatory approval of Vysyneum in the European Union until there is more clarity from the FDA on next steps for Vicineum in the United States. In October and non-hold deficiencies that neededDecember 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be addressed. In December 2016, we submitted a requestrequired for a pre-IND meeting to seek input onpotential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the manufacturing, nonclinical and clinical plansrequirements for VB6-845d prior to resubmitting an IND. In February 2017,potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA provided guidancefor March 28, 2022 in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
Maximize the commercial potential Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. We own exclusive, worldwide rights to Vicineum and we have out-licensed the rights to Vicineum in Greater China, the Middle East and North Africa region (“MENA”) and Turkey. If Vicineum receives marketing approval from the FDA for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, we plan to pursue commercialization strategies that maximize the value of Vicineum in the United States by partnering with a contract sales organization. Based on our manufacturingmarket research, we believe Vicineum has an innovative profile with a high possibility that patients, healthcare professionals and nonclinical planspayors will be advocates for VB6-845d. Based on this guidance,its use for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, which we are performing additional studies and an updated IND submission is planned for in the first quarter of 2018.believe represents a significant commercial opportunity. We believe that we will be able to effectively communicate differentiating characteristics and key attributes of Vicineum to patients, physicians and payors, with the deBouganin payload in VB6-845d may enhance the actiongoal of checkpoint inhibitorsestablishing favorable reimbursement as well as a resultfavorable formulary status in targeted urology practices. Additionally, we believe that our plans to partner with a contract sales organization should allow us to address the urologists-initiated treatment market for non-muscle invasive CIS of the promotion of a local tumor immune response followingbladder in patients previously treated with adequate or less than adequate BCG in the death of cancer cells.
United States in an efficient and effective way.
Explore opportunities in combination therapies. We plan to continue discussions with potential partners that utilize technologies whose mechanism of action could be complementary to our TPT platform. These technologies include, but are not limited to, checkpoint inhibitors, immune modulators and other immuno-oncology agents.
Expand on the value of selected product candidatesVicineum through strategic partnerships. We may decideIf we obtain regulatory approval for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, we intend to build a North American specialty urology sales force to market the product in the United States. Outside the United States, we will continue to seek additional business development partners with urology expertise by selectively partnerpartnering with pharmaceutical and biopharmaceutical companies when we believe that a partner could bring additional resources and expertise to maximize the value of oneVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or more of our product candidates.
Leverage our TPT platform to develop additional product candidates. We intend to develop additional product candidates based on our TPT platform. Depending on the strategicless than adequate BCG. In 2020 and financial merits, we may enter into partnerships and collaborations to support these development efforts.
Maximize the commercial value of our product candidates. We maintain global development, marketing and commercialization rights for all of our TPT-based product candidates. If we obtain regulatory approval for Vicinium in high-grade NMIBC, we may build a North American specialty urology sales force to market the product or seek commercialization partners. Outside North America, we will seek commercialization partners with urology expertise. If we obtain regulatory approval for our other product candidates, including Proxinium, we may seek partners with oncology expertise in order to maximize the commercial value of each asset or a portfolio of assets.
Our License Agreement with Roche
On June 10, 2016,2021, we entered into license agreements to support such commercialization efforts outside the LicenseUnited States for Greater China, MENA and Turkey.
Explore opportunities in combination therapies. We plan to continue discussions with potential partners that utilize technologies whose mechanism of action could be complementary to our TFPT platform. These technologies include, but are not limited to, checkpoint inhibitors, immune modulators and other immuno-oncology agents. In June 2017, we entered into a Cooperative Research and Development Agreement (“CRADA") with Roche.the National Cancer Institute ("NCI") for the development of Vicineum in combination with AstraZeneca’s immune checkpoint inhibitor durvalumab for the treatment of NMIBC. Vicineum is believed to work via a dual
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mechanism of action to directly kill cancer cells and activate a local inflammatory process that stimulates T-cells, which then proliferate and destroy the cancer cells. Because of this second mechanism, there may be potential for a synergistic effect when given in combination with checkpoint inhibitors. Under the License Agreement, we granted Roche an exclusive, worldwide license to develop and commercialize, at its cost, our monoclonal antibody EBI-031 and all other IL-6 antagonist antibody technology owned by us. Pursuant to the terms of the License Agreement, RocheCRADA, this hypothesis is requiredbeing tested by the NCI in Phase 1 clinical trial in patients with BCG-unresponsive NMIBC to evaluate the safety, efficacy and biological correlates of Vicineum in combination with durvalumab (“NCI Trial”). On September 10, 2021, preliminary results from an interim analysis of 12 patients in the NCI Trial (“Interim Analysis”) were presented at a conference hosted by the American Urological Association. Enrollment in the Phase 1 clinical trial is ongoing. Based on the Interim Analysis, the combination of Vicineum and durvalumab has been generally well-tolerated with no new safety signals emerging (no Grade 4 or 5 treatment-related adverse events) and has a similar safety profile compared to both agents used individually. The Interim Analysis also indicated a 3-month complete response rate of 42% (5/12) and a 12-month complete response rate of 17% (2/12).

We have deferred further development of Vicineum for the treatment of SCCHN and of VB6-845d in order to continue developing EBI-031focus our efforts and any other product made fromour resources on our ongoing development and, if approved, the other transferred IL-6 antagonist antibody technology at its cost.
Roche paid an upfront license feecommercialization of $7.5 million and $22.5 million as a resultVicineum for the treatment of non-muscle invasive CIS of the IND applicationbladder in patients previously treated with adequate or less than adequate BCG. We are also exploring collaborations for EBI-031 becoming effective. Roche has also agreed to pay up to an additional $240.0 million uponVicineum for the achievementtreatment of specified regulatory, developmentSCCHN and commercial milestones. In addition, we are entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% for net sales of potential future products containing EBI-031 and up to 50% of these rates for net sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to the buy-out options of Roche.VB6-845d.
Our Product Pipeline
At this time, we are focused exclusively on the clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and have deferred further development of our other product candidates. The following table sets forth our current development stage programs:

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ViciniumVicineum for the Treatment of Non-Muscle Invasive CIS of the Bladder in Patients Previously Treated with Adequate or Less Than Adequate BCG
Overview
Our most advanced locally-administered product candidate, Vicinium, is being developedWe are developing Vicineum, oportuzumab monatox, for the treatment of high-grade NMIBCnon-muscle invasive CIS of the bladder in subjects who havepatients previously received two courses of BCG and whose diseasetreated with adequate or less than adequate BCG. Vicineum is now BCG-unresponsive. Vicinium is administered bygiven via intravesical administration directly into the bladder. ViciniumVicineum utilizes an immunogenic cytotoxic protein payload that is a truncated form of ETA produced by the bacterial species Pseudomonas. ViciniumVicineum also includes an anti-EpCAM ScFv targeting moietydomain that is required to deliver the ETA into EpCAM expressingEpCAM-expressing cancer cells. The toxicity to non-cancerous bladder cells is minimized due to their not having EpCAM over-expressed on their surface.
In a completed Phase 2 clinical trial, of the 45 evaluable subjects, 40% achieved a complete response, or CR, or no evidence of disease at three months while 16% remained disease-free for at least 18 months. Median time to disease recurrence was 274 days for subjects achieving a CR following a six-week induction phase, and this was extended to 408 days for subjects achieving a CR following a longer 12-week induction phase. No statistically significant difference was observed between the two dosing strategies (p=0.17). Vicinium was generally well-tolerated with no subjects discontinuing treatment in Phase 1 and Phase 2 clinical trials due to adverse events.

Based upon our September 2014 end of Phase 2 meeting withAugust 2018, we received Fast Track designation from the FDA we, throughfor Vicineum for the treatment of BCG-unresponsive NMIBC. The FDA has conditionally accepted the proprietary brand name VICINEUM™ for our recently acquired subsidiary Viventia, commenced an open-label, non-randomized Phase 3 clinical trial of Vicinium in subjects with high-grade NMIBC who have received two courses of BCG, and whose disease is now BCG-unresponsive, and for whom the current standard of care is the surgical removal of their bladder, or a radical cystectomy, in the third quarter of 2015 in the United States and Canada. Based on safety and efficacy data observed with the longer 12-week induction in our Phase 2 clinical trial, the FDA agreed to our plan to employ more frequent dosing in our Phase 3 clinical trial, in which the primary end points are CR and duration of response, or DoR, in subjects with carcinoma in situ, or CIS, whose disease is BCG-unresponsive. In November 2016, the FDA provided draft guidance regarding appropriate clinical trial design for new therapies for NMIBC, including the use of single-arm studies, and we believe that our Phase 3 clinical trial design is consistent with the FDA’s draft guidance. We anticipate complete enrollment in this clinical trial in the second half of 2017 with topline data in 2018. If this Phase 3 clinical trial is successful, we intend to initially pursue regulatory approval in the United States and Canada.
As part of this trial, in July 2015, we submitted a Clinical Trial Application, or CTA, to Health Canada to include Canadian sites. In September 2015, we received a No Objection Letter from Health Canada, permitting us to proceed with our Phase 3 clinical trial in Canada. Assuming that we receive positive data in our Phase 3 clinical trial, we intend to initiate discussions with the EMA regarding a regulatory pathway for E.U. approval.
Overall, we believe that our efficacy and safety data support the continued clinical development of Vicinium to fulfill a significant unmet medical need in subjects with high-grade NMIBC. Because Vicinium contains ETA, an immunogenic cytotoxic payload that elicits an anti-ETA immune response, we believe the local administration of Vicinium may produce interactions with the immune system in the local tumor environment, killing bladder cancer cells, and promoting the production of tumor cell surface antigens into this local tumor environment that may create a heightened cross priming effect.
We own or exclusively license worldwide rights to our Vicinium intellectual property portfolio that provides unextended patent term until 2024, and, if our pending patent applications for Vicinium are granted patent protection until at least 2036. See ‘‘Business-Intellectual Property’’ for additional details.product candidate, oportuzumab monatox.
Disease overviewOverview
Most cancers that form in the bladder are transitional cell carcinomas that derive from the transitional cell lining of the bladder. Transitional cell carcinoma of the bladder can be characterized as either high-grade or low-grade. Low-grade bladder cancer often recurs occursin the lining of the bladder, after treatment, but rarely invades the muscular wall of the bladder or spreads to other parts of the body and is unlikely to be fatal. High-grade bladder cancer commonly recursoccurs in the bladder, has a strong tendency to invade the muscular wall of the bladder, spreadsspread to other parts of the body and is much more likely to result in death. Bladder cancer is also divided into muscle-invasive and NMIBC,non-muscle invasive, based on invasion of the muscularis propria, which is the thick muscle deep in the bladder wall. Muscle invasiveMuscle-invasive disease is more likely to spread to other parts of the body.
There are three forms of high-grade NMIBC, which areNMIBC: Ta, a papillary tumor in the innermost layer of the bladder lining,lining; T1, a papillary tumor that has started to grow into the connective tissue beneath the bladder lining,lining; and CIS, flat lesions of the transitional cell lining of the bladder. Papillary tumors are generally low-grade with low risk of progression, although about two to nine percent are high-grade, with a moderately high risk of progression to muscle-invasive bladder cancer. Evaluable CIS tumors are always high-grade, with a worse prognosis than papillary tumors.tumors, as such CIS tumors appear irregular and abnormal under a microscope and the tumors are more aggressive, with a highhigher probability of progression to muscle-invasive disease. Furthermore, the incidence of CIS in conjunction with Ta or T1 tumors results in a higher risk of recurrence and progression. About 75% to 85% of bladder cancers are non-muscle invasive. Of these, Ta tumors account for about 70%, CIS accounts for about 10% and T1 tumors account for about 20% and CIS lesions account for about 10%.
BladderAccording to World Cancer Research Fund International figures, bladder cancer is the ninthtenth most common cancer diagnosed worldwide and the second most common malignancy of the genitourinary system. Theresystem, which refers to cancers of the urinary system of men and women and the reproductive organs of men.In 2020, there were an estimated 430,000573,000 new cases of bladder cancer diagnosed in 2012 and 165,000213,000 deaths worldwide.worldwide, according to data from the Global Cancer Observatory. The 5-year global prevalence of bladder cancer, or the number of individuals with bladder cancer in a 5-year period, is estimated at 2.71.7 million individuals. The American Cancer Societymost recent data from the NCI's Surveillance, Epidemiology and End-Result Program ("SEER") estimated that approximately 79,03084,000 new cases of bladder cancer would be diagnosed in 20172021 and there would be approximately 16,87017,000 deaths due to bladder cancer in the United States during 2017.2021. Based on a 2010 estimate prepared using Medicare data from the Surveillance, Epidemiology, and End Results program,2014 publication in Current Opinion in Urology, among cancers in the United States, bladder cancer has the highest per-patient treatment costs, with an estimated overall cost of $3.9approximately $4.0 billion annually. In the United States, bladder cancerannually and has the highest overall cost among the elderly. Based on our assessment of the market, the treatment paradigm has remained the same since those figures were generated, and we believe the cost of care has increased.
NMIBC makes up 70%75% to 80%85% of all bladder cancers. The high recurrence rate and ongoing invasive monitoring requirement of bladder cancers are the key contributors to the economic and human toll of this disease. Bladder cancer occurs

predominantly in older patients (about nine of the 10ten people with bladder cancer are over the age of 55 years). The median age at diagnosis is approximately 73 years.years of age. Overall, the five yearfive-year survival rate for bladder cancer in the United States is 77%. While the five yearfive-year survival rates are 98% for stage zero and 88% for stage one NMIBC, once the cancer becomes invasive, the rates drop dramatically with five yearfive-year survival rates of 63%, 46% and 15% for stage two, three and four muscle invasive bladder cancers, respectively. We are targeting subjectspatients with BCG-unresponsive high-grade NMIBC. We estimate that this segmentnon-muscle invasive CIS of the U.S.bladder in patients previously treated with adequate or less than adequate BCG. Our initial target market isincludes the approximately 65,000 patients.6,000 patients in the US diagnosed annually, including those patients with non-muscle invasive CIS of the bladder previously treated with adequate or less than adequate BCG. We would expect that, if ViciniumVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG is approved by the FDA, patients would receive treatment until the earlier of 2 years orand disease recurrence.
Current approachesApproaches to treatmentTreatment
Within high-grade NMIBC,non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, the initial treatment of Ta or T1 is transurethral resection of the bladder tumor or TURBT,("TURBT") followed by BCG treatment. For CIS, whether or not TURBT is an option, BCG is the standard of care. BCG is a live attenuated strain of Mycobacterium bovis, with
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a diminished virulence in humans. Since BCG works by utilizing an immune/inflammatory mechanism, BCG is generally initiated only two to four weeks after TURBT, allowing the urothelium to heal and lowering the risk of systemic infection. When high-grade bladder tumors have been completely resected, BCG is used as adjuvant therapy to prevent recurrence. In patients with residual disease after resection, BCG helps to eradicate residual disease and delay progression. The BCG regimen consists of an induction phase followed by a maintenance phase. The induction phase involves six consecutive once-weekly instillations of the drug into the bladder. The maintenance phase involves three consecutive once-weekly instillations repeated every three to six months for at least one year. The response rate to a single induction phase of BCG is 60% to 70% with an additional 30% to 50% of the non-responders becoming responders following a second induction phase. However, BCG’s failure rate for all responders is estimated to be as high as 50% within the first 12 months of treatment and 90% within five years.
For patients who received BCG and whose disease is now BCG-unresponsive, surgical removal of the bladder, or a radical cystectomy ishas been recommended due to the risk of progression to muscle invasive disease, which greatly reduces a patient’s prognosis. Radical cystectomy is a complex surgery associated with a high complication rate of 25% to 35% and a mortality rate of 1% to 3%, with8% within six months of surgery. The surgery also entails a number of short-term risks including bleeding and/or clots, infections, bowel obstruction, bowel perforation, peritonitis and injury to the urethra. More than 25% of radical cystectomy patients require hospital readmission for surgery-related complications within 90 days following surgery. The impact of radical cystectomy is life-altering, with major lifestyle changes, including incontinence and sexual dysfunction, and daily issues related to management of the external bag for urine collection.
Keytruda was approved by the FDA in January 2020 for the treatment of patients with Bacillus Calmette-Guerin (BCG)-unresponsive, high-risk, non-muscle invasive bladder cancer (NMIBC) with carcinoma in situ (CIS) with or without papillary tumors who are ineligible for or have elected not to undergo cystectomy and is the only approval of Keytruda in the NMIBC space. Keytruda has been on the market for the treatment of BCG-unresponsive CIS (+/- Ta/T1) patients since January 2020. In 2009, Endo Pharmaceuticals Inc.'s Valstar (valrubicin) was re-launched in the United States for the treatment of BCG-refractory CIS bladder cancer in patients for whom radical cystectomy is not an option. Valstar is administered intravesically directly into the bladder once a week for six weeks. Due to drug resistance and toxicities, Valstar has had limited clinical utility. Other than Keytruda and Valstar, there are no other approved therapies for BCG-unresponsive CIS bladder cancer. However, there are various other intravesical product candidates in development for the treatment of NMIBC, including product candidates developed by FerGene Inc. (Adstiladrin/nadofaragene firadenovec (rAd-IFN/Syn3)), AADi, LLC (ABI-009), Altor BioScience Corp. (ALT-801)ImmunityBio (Anktiva/N-803 in combination with BCG), Cold Genesys,Theralase Technologies Inc. (TLD-1433), Janssen (Erdafitinib and TAR-200) and CG Oncology (CG0070). In addition, systemically-administered checkpoint inhibitors are being evaluated for the treatment of NMIBC including products developed by Bristol-Myers Squibb (Opdivo alone or in combination with BCG +/- BMS986205), F. Hoffmann-La Roche AG (Tecentriq) andFKD Therapies Oy (Instiladrin) AstraZeneca (Imfinzi). Another route of administration for checkpoint inhibitor is currently being evaluated by Pfizer with the subcutaneous administration of Sasanlimab (PF-06801591) for the treatment of BCG-unresponsive NMIBC patients.
Regulatory Update
United States
In December 2020, we submitted our completed BLA for Vicineum for BCG-unresponsive NMIBC to the FDA, which was accepted for filing by the FDA in February 2021. The FDA granted Priority Review for the BLA and set a target PDUFA date for a decision on the BLA of August 18, 2021. On August 13, 2021, we received a CRL from the FDA indicating that the FDA had determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality.
On October 29, 2021, we participated in a CMC Type A Meeting with the FDA. During the CMC Type A Meeting, we and the FDA reviewed issues related to CMC to be further discussed during the review of a BLA for Vicineum upon potential resubmission. We believe we have a clear understanding of what additional information regarding CMC is required for a potential resubmission of a BLA. Additionally, although not an issue raised in the CRL, the FDA confirmed at the CMC Type A Meeting that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical trials. The FDA also confirmed that we can utilize Vicineum manufactured during process validation for any future clinical trials needed to address issues raised in the CRL, and that any of these future trials can proceed while addressing CMC issues raised in the CRL.
On December 8, 2021, we participated in a Clinical Type A Meeting with the FDA to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA.The FDA encouraged us to include the Vista Trial data in a BLA resubmission.
On January 7, 2022, the FDA granted our request for a Type C Meeting to discuss the study protocol for an additional Phase 3 clinical trial that we plan to conduct for potential resubmission of a BLA for Vicineum for the treatment of non-muscle invasive
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CIS of the bladder in patients previously treated with adequate or less than adequate BCG. The Type C Meeting has been scheduled for March 28, 2022.
Although the FDA previously conditionally accepted the name Vicineum for our product candidate, oportuzumab monatox, in the United States, this approval is subject to further and final review by FDA upon potential resubmission of a BLA. If the FDA objects to our proposed proprietary product name, we may be required to expend significant additional resources in an effort to identify a suitable proprietary product name that would qualify under applicable laws, not infringe the existing rights of third parties and be acceptable to the FDA.
European Union
On March 5, 2021, we submitted a MAA to the EMA for Vysyneum for the treatment of BCG-unresponsive NMIBC under the EMA’s centralized procedure. On March 31, 2021, we were informed that the Committee for Medicinal Products for Human Use of the EMA had conditionally accepted the proprietary brand name Vysyneum for our product candidate, oportuzumab monatox, in the European Union.
On August 20, 2021, we withdrew our MAA to the EMA for Vysyneum for the treatment of BCG-unresponsive NMIBC in order to pause our plans to pursue regulatory approval of Vysyneum in the European Union until there is more clarity from the FDA on next steps for Vicineum in the United States.
On October 20, 2021, the EMA issued its Withdrawal Assessment Report relating to our MAA for Vysyneum, as is consistent with the EMA’s standard practice when an MAA is withdrawn. The Assessment Report reflects the initial assessment and corresponding questions from the EMA and identifies major objections in the areas of quality, good clinical practice, efficacy and safety. Due to the high concordance between FDA and European Commission approvals, we believe that the probability of success of future approval in the European Union for Vysyneum increases if FDA approval for Vicineum has already been obtained.
Although the EMA previously conditionally accepted the name Vysyneum for our product candidate, oportuzumab monatox, in the European Union, this approval is subject to further and final review by the EMA upon potential resubmission of the MAA. If the EMA objects to our proposed proprietary product name, we may be required to expend significant additional resources in an effort to identify a suitable proprietary product name that would qualify under applicable laws, not infringe the existing rights of third parties and be acceptable to the EMA.
China
On July 30, 2020, we and our wholly-owned subsidiary, Viventia Bio, Inc., entered into an exclusive license agreement with Qilu Pharmaceutical, Co., Ltd. (“Qilu”) pursuant to which we granted Qilu an exclusive, sublicensable, royalty-bearing license, under certain intellectual property owned or exclusively licensed by us, to develop, manufacture and commercialize Vicineum for the treatment of BCG-unresponsive NMIBC and other types of cancer in Greater China. The Investigational New Drug application (“IND”) for Vicineum submitted by Qilu to the Center for Drug Evaluation of the China National Medical Products Administration was accepted for review in January 2021 and approved in March 2021.
On June 1, 2021, we entered into a Global Supply Agreement with Qilu pursuant to which Qilu will be part of the manufacturing network for, if approved, global commercial supply of Vicineum drug substance and drug product.
On July 20, 2021 we and Qilu announced the enrollment of the first patient in China in a Phase 3 clinical trial to assess the efficacy and safety of Vicineum in patients with BCG-unresponsive NMIBC. The open-label, single-arm, multi-center bridging trial will evaluate the efficacy and safety of Vicineum in approximately 53 patients with carcinoma in situ (CIS) with or without papillary disease, high-grade Ta papillary disease or T1 papillary disease of any grade. Patients will be required to have failed previous treatment with BCG for inclusion in the trial. The primary endpoints are the complete response rate (for CIS patients) and the recurrence-free rate (for papillary patients) at six months, with the complete response rate and the recurrence-free rate at three months, safety and tolerability as the secondary endpoints. Based on the partnership agreement between Sesen Bio and Qilu Pharmaceutical, the trial is being run at the sole cost of Qilu Pharmaceutical.
MENA
On November 30, 2020, we and our wholly owned subsidiary, Viventia Bio, Inc., entered into an exclusive license agreement with Hikma Pharmaceuticals LLC, to develop and commercialize Vicineum for the treatment of BCG-unresponsive NMIBC in the MENA region (20 countries in the Middle East and North Africa). No submission for registration has taken place in any of the countries as approvals are contingent on FDA or EMA approval.
Turkey
On August 5, 2021, we entered into an exclusive license agreement with EİP Eczacıbaşı İlaç Pazarlama A.Ş., to develop and commercialize Vicineum for the treatment of BCG-unresponsive NMIBC in Turkey and Northern Cyprus. No submission for registration has taken place in either region as approvals are contingent on FDA or EMA approval.
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Internal Review
In September 2021 we disclosed that our Board of Directors (the “Board”) initiated an independent internal review conducted by outside counsel with the assistance of subject matter experts focusing on the conduct of, and data generated from, the clinical trials of Vicineum for the treatment of BCG-unresponsive NMIBC, and pre-clinical studies
Pre-clinical studies. Our in vitro studiesthe overall safety of Vicinium in bladder cancer cell lines demonstrated activity following an exposure time equivalent to clinical dosing.Vicineum (the “Review”). The anti-tumor activity of Vicinium was also evaluated against human tumor xenografts (SCCHN, colorectal and small cell lung carcinoma cell lines) using an athymic mouse model. Mice bearing EpCAM-positive human tumor xenografts implanted subcutaneously were administered 0.25-0.5 mg/kg of Vicinium by intravenous injection, and tumor size monitoredReview took place over the course of five months, involved full cooperation from our management team, a review of more than 600,000 documents, and 39 interviews of current and former employees and consultants. It is now complete. As a result of the pre-clinicalReview, the Board continues to fully support our current management team and believes no changes or amendments relating to our prior disclosures to the Securities and Exchange Commission (“SEC”) or the FDA relating to Vicineum, the Phase 3 VISTA trial for Vicineum for the treatment of BCG-unresponsive NMIBC, or the BLA for Vicineum are warranted. We intend to work cooperatively with the FDA in preparing for an additional Phase 3 clinical trial for Vicineum.
New Proposed Phase 3 Clinical Trial
On January 7, 2022, the FDA granted our request for a Type C Meeting to discuss the study (33protocol for an additional Phase 3 clinical trial that we plan to 51 days post-initiationconduct for potential resubmission of treatment)a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. The Type C Meeting has been scheduled for March 28, 2022.
Prior Phase 3 Clinical Trial – VISTA Trial
We, through our subsidiary Viventia, commenced our single-arm, multi-center, open-label Phase 3 clinical trial ("VISTA Trial') in patients with BCG-unresponsive NMIBC who have received adequate BCG and comparedwhose disease is now BCG-unresponsive, and for whom the then-current standard of care was a radical cystectomy in the third quarter of 2015 in the United States and Canada. Based on safety and efficacy data observed with the longer 12-week induction in our Phase 2 clinical trial, the FDA agreed to our plan to employ more frequent dosing in the VISTA Trial, in which the primary endpoints were complete response ("CR") and duration of response ("DoR") in patients with CIS whose disease is BCG-unresponsive. In November 2016, the FDA issued draft guidance regarding appropriate clinical trial design for new drugs and biologics for BCG-unresponsive NMIBC, including the use of single-arm trials. The FDA finalized this guidance in February 2018 and retained many of the recommendations from the 2016 draft guidance regarding clinical trial design, including the use of single-arm trials. We believe that our VISTA Trial design was consistent with these aspects of the FDA’s guidance.
The primary and secondary endpoints for the VISTA Trial were as follows:
Dose30 mg of Vicineum (in 50 mL of saline)
Total enrollment133 patients, including 93 CIS patients whose disease is BCG-unresponsive
Primary endpointsCRR at 3 months in patients with CIS (with or without papillary disease) whose disease is BCG-unresponsive; and
Kaplan-Meier estimate of DoR for BCG-unresponsive CIS patients who experience a CR at 3 months (post-induction).
Patients with CIS were considered to have a CR if at the time of any disease status evaluation (per protocol every 13 weeks or any unscheduled evaluation) there was no evidence of high-grade disease (CIS, high-grade Ta or any grade T1 disease) or disease progression (e.g., to muscle invasive disease). Low-grade disease was not considered a treatment failure in these patients, and they could remain on study treatment following TURBT.
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Secondary endpointsEvent-free survival in all patients;
CRR at 6, 9, 12, 15, 18, 21 and 24 months in patients with CIS whose disease is BCG-unresponsive;
Time to cystectomy in all patients;
Time to disease recurrence in papillary patients;
PFS in all patients;
OS in all patients; and
Safety and tolerability of Vicineum therapy in all patients.
Exploratory endpointTo evaluate biomarkers that may be associated with response or disease progression or treatment failure, which may include, for example, EpCAM status, tumor subtype morphology, furin levels in tumor cell endosomes, presence of a glycosaminoglycan coat and presence of receptors that could impede a host anti-tumor immune response, such as PD-L1.
The VISTA Trial completed enrollment in April 2018 with a total of 133 patients across three cohorts based on histology and time to disease recurrence after adequate BCG treatment (under 2018 FDA guidance on treatment of NMIBC, adequate BCG is defined as at least one of the following (i) at least five of six doses of an untreated tumor-bearing group. Vicinium demonstrated significant tumor growth suppression. Vicinium is designedinitial induction course plus at least two of three doses of maintenance therapy or (ii) at least five of six doses of an initial induction course plus at least two of six doses of a second induction course):
Cohort 1 (n=86): Patients with CIS with or without papillary disease that was determined to be refractory or recurred within six months of their last course of adequate BCG;
Cohort 2 (n=7): Patients with CIS with or without papillary disease that recurred after six months, but less than 11 months, after their last course of adequate BCG; and
Cohort 3 (n=40): Patients with high-risk (Ta or T1) papillary disease without CIS that recurred within six months of their last course of adequate BCG.
The primary endpoints of the VISTA Trial were CRR at 3 months in patients with CIS (with or without papillary disease) whose disease is BCG-unresponsive and DoR for BCG-unresponsive CIS patients who experience a localCR.
As of the May 29, 2019 data cutoff date, preliminary primary and secondary endpoint data for each of the trial cohorts were as follows:
Cohort 1 (n=86) Evaluable Population (n=82) Complete Response Rate, for CIS:
Time PointEvaluable Patients*
Complete Response Rate
(95% Confidence Interval)
3-monthsn=8239% (28%-50%)
6-monthsn=8226% (17%-36%)
9-monthsn=8220% (12%-30%)
12-monthsn=8217% (10%-27%)
*Response-evaluable population includes any mITT patient who completed the induction phase.
Cohort 2 (n=7) Evaluable Population (n=7) Complete Response Rate, for CIS:
Time PointEvaluable Patients*
Complete Response Rate
(95% Confidence Interval)
3-monthsn=757% (18%-90%)
6-monthsn=757% (18%-90%)
9-monthsn=743% (10%-82%)
12-monthsn=714% (0%-58%)
*Response-evaluable population includes any mITT patient who completed the induction phase.

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Pooled Cohorts 1 and 2 (n=93) Evaluable Population (n=89) Complete Response Rate, for CIS:
Time PointEvaluable Patients*
Complete Response Rate
(95% Confidence Interval)
3-monthsn=8940% (30%-51%)
6-monthsn=8928% (19%-39%)
9-monthsn=8921% (13%-31%)
12-monthsn=8917% (10%-26%)
*Response-evaluable population includes any mITT patient who completed the induction phase.
Phase 3 Pooled Complete Response Rate vs. Phase 2 Pooled Complete Response Rate:
Time PointPhase 3 Pooled CRR (95% Confidence Interval)Phase 2 Pooled CRR (95% Confidence Interval)
3-months40% (30%-51%)40% (26%-56%)
6-months28% (19%-39%)27% (15%-42%)
9-months21% (13%-31%)18% (8%-32%)
12-months17% (10%-26%)16% (7%-30%)

Cohort 3 (n=40) Evaluable Population (n=38) Recurrence-Free Rate†:
Time PointEvaluable Patients*
Recurrence-Free Rate
(95% Confidence Interval)
3-monthsn=3871% (54%-85%)
6-monthsn=3858% (41%-74%)
9-monthsn=3845% (29%-62%)
12-monthsn=3842% (26%-59%)
†Recurrence-free rate is defined as the percentage of patients that are recurrence-free at the given assessment time point.
*Response-evaluable population includes any mITT patient who completed the induction phase.
    Duration of Response:The median DoR for patients in Cohort 1 and Cohort 2 combined (n=93) is 287 days (95% CI, 154-NE), using the Kaplan-Meier method. Additional ad hoc analysis of pooled data for all patients with CIS (Cohorts 1 and 2, n=93) shows that among patients who achieved a complete response at 3 months, 52% remained disease-free for a total of 12 months or longer after starting treatment, using the Kaplan-Meier method. DoR is defined as the time from first occurrence of complete response to documentation of treatment failure or death.
    We have conducted additional analyses for secondary endpoints. These additional data include the following:
Time to Cystectomy:Across all 133 patients treated with Vicineum in the VISTA Trial, greater than 75% of all patients are estimated to remain cystectomy-free at 3 years, using the Kaplan-Meier method. Additional ad hoc analysis shows that approximately 88% of responders are estimated to remain cystectomy-free at 3 years. Time to cystectomy is defined as the time from the date of first dose of study treatment to surgical bladder removal. The first 2018 FDA guidance on treatment of BCG-unresponsive NMIBC patients states that the goal of therapy in such patients is to avoid cystectomy. Therefore, time to cystectomy is a key secondary endpoint in the VISTA Trial.
Time to Disease Recurrence: High-grade papillary (Ta or T1) NMIBC is associated with high rates of progression and recurrence. The median time to disease recurrence for patients in Cohort 3 (n=40) is administered by intravesical instillation directly402 days (95% CI, 170-NE), using the Kaplan-Meier method. Time to disease recurrence is defined as the time from the date of the first dose of study treatment to the bladder. Vicinium repeatedly administered subcutaneouslyfirst occurrence of treatment failure or death on or prior to treatment discontinuation.
Progression-Free Survival ("PFS"):90% of all 133 patients treated with Vicineum in both ratsthe VISTA Trial are estimated to remain progression-free for 2 years or greater, using the Kaplan-Meier method. PFS is defined as the time from the date of first dose of study treatment to the first occurrence of disease progression (e.g., T2 or more advanced disease) or death on or prior to treatment discontinuation.
Event-Free Survival: 29% of all 133 patients treated with Vicineum in the VISTA Trial are estimated to remain event-free at 12 months, using the Kaplan-Meier method. Event-free survival is defined as the time from the date
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of first dose of study treatment to the first occurrence of disease recurrence, progression or death on or prior to treatment discontinuation.
Overall Survival ("OS"):96% of all 133 patients treated with Vicineum in the VISTA Trial are estimated to have an overall survival of 2 years or greater, using the Kaplan-Meier method. OS is defined as the time from the date of first dose of study treatment to death from any cause.
Data is as of the May 29, 2019 data cut from the Phase III VISTA trial. The clinical data shown are based on the data submitted in the BLA on December 18, 2020. Final numbersare pending. On August 13, 2021, the FDA issued a CRL for the BLA that included requests for additional clinical and cynomolgus monkeys did not resultstatistical data.
Safety Results
As of the May 29, 2019 data cutoff date, in any product candidate-related systemic toxicity. Toxicities associatedpatients across all cohorts (n=133) of our Phase 3 VISTA Trial of Vicineum for the treatment of BCG-unresponsive NMIBC, 88% experienced at least one adverse event, with subcutaneous administration95% of adverse events being Grade 1 or 2. The most commonly reported treatment-related adverse events were limited to localized irritationdysuria (14%), hematuria (13%) and urinary tract infection (12%), all of which are consistent with skin lesions resolvingthe profile of bladder cancer patients and the use of catheterization for treatment delivery. These adverse events were determined by the end of the pre-clinical study. Vicinium was foundclinical investigators to be immunogenicmanageable and reversible, and only four patients (3%) discontinued treatment due to an adverse event. Serious adverse events, regardless of treatment attribution, were reported in all species tested with anti-drug antibodies14% of patients. There were four treatment-related serious adverse events reported in three patients including acute kidney injury (Grade 3), pyrexia (Grade 2), cholestatic hepatitis (Grade 4) and renal failure (Grade 5 or death). There were no age-related increases in adverse events observed after seven days of dosing.in the VISTA Trial.
Phase 1 clinical trial. and 2 Clinical Trials
Phase 1 Clinical Trial. We initiated an open-label, dose-escalating Phase 1 clinical trial of ViciniumVicineum for the treatment of BCG-unresponsive NMIBC in September 2004 at 22 sites in Canada. We enrolled 64 subjectspatients with high-grade Ta or T1 tumors with or without CIS (17 of which had CIS) and who had previously received at least one treatment of BCG. The Phase 1 clinical trial was designed to assess safety and determine the maximum tolerated dose, and the recommended Phase 2 dose. The secondary objective was to explore the anti-tumor activity of Vicinium.

Vicineum.
Eight dose levels were initially evaluated, ranging from 0.1 to 10.56 mg, doseand given once weekly for six consecutive weeks. Each dose was administered by instillation and held for two hours prior to voiding. Safety data from each dose cohort was evaluated after three weeks of treatment before proceeding to the next dose cohort. A maximum tolerated dose was not reached; therefore, additional escalations through 13.73 mg, 17.85 mg, 23.20 mg and 30.16 mg were undertaken. No dose-limiting toxicities or DLTs, were reported and no maximum tolerated dose was reached in these additional dose-escalations. ViciniumVicineum was generally well-tolerated at each of these escalated doses.
A CR was defined in this Phase 1 clinical trial as non-positive urinaryurine cytology and either normal cystoscopy or abnormal cystoscopy with negative biopsy. Of the 64 subjectspatients enrolled, only 61 were considered to be evaluable for efficacy as two subjectspatients were excluded from the analysis due to an absence of BCG treatment prior to this Phase 1 clinical trial, and there was one unrelated death for whom no final tumor assessment was obtained. Evidence of clinical efficacy, as defined by a CR, was achieved by 24 of the 61 randomized subjectspatients (39%). Only three of the 17 subjectspatients (18%) treated in the 0.1-<1mg/1 mg/dose range were CRs. In contrast, seven of the 14 subjectspatients (50%) treated in 1.0-<10mg/10 mg/dose range and 14 of the 30 subjectspatients (46.7%) treated in the ≥10mg/≥10 mg/dose range experienced CRs at the three monththree-month assessment. Of the subjectspatients with CIS, five of the 17 subjectspatients (29%) achieved a CR, while non-recurrence was observed in seven of the 16 subjectspatients with T1 (43.8%) and 12 of the 28 subjectspatients with Ta (42.8%). This Phase 1 clinical trial was completed in April 2006.
Phase 2 clinical trial. Clinical Trial. Based on our Phase 1 clinical trial conducted in Canada, we submitted the IND for ViciniumVicineum for the treatment of BCG-unresponsive NMIBC to the FDA in August 2005, and we initiated an open-label Phase 2 clinical trial of ViciniumVicineum in March 2007 at 20 sites in Canada and the United States. We enrolled 46 subjectspatients with CIS (with or without Ta or T1) who had previously received at least one treatment of BCG. Of the 46 subjectspatients enrolled, 27 subjectspatients (58.7%) had received at least two treatments of BCG. The Phase 2 clinical trial was designed to determine the tolerability and explore the potential for clinical benefit from Vicinium.Vicineum. Clinical benefit was defined in this Phase 2 clinical trial as a CR or no evidence of disease at the three monththree-month evaluation. A CR was defined in this Phase 2 clinical trial as no histological evidence of disease and negative urine cytology. Any cases with no histological evidence of disease on initial biopsy but atypical or suspicious urine cytology were also considered CRs only if they remained negative after being evaluated with repeat biopsy, directed and random. Vicinium showed evidence of clinical efficacy. A subjectpatient was considered to have a durable CR if that subjectpatient obtained a CR and remained disease-free for a period of at least 12 months from initiation of treatment.
The dosing regimen for our Phase 2 clinical trial included an induction phase followed by a maintenance phase, consisting of three weekly treatments and then nine weeks of no treatment repeated every three months for at least one year and ending with nine weeks of no treatment.year. There were two treatment groups in this Phase 2 clinical trial. Treatment Arm A consisted of 23 subjects,patients, of which 22 were ultimately evaluable as one subjectpatient violated eligibility requirements early in this Phase 2 clinical trial. Twenty-two subjectspatients in the induction phase
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received six consecutive once-weekly instillations of 30 mg of Vicinium.Vicineum. At the three-month assessment, subjectspatients with residual disease but no disease progression-where disease progression iswas defined as being muscle invasive-were eligible for either a second induction phase or a maintenance phase, which consisted of three consecutive once-weekly instillations repeated every three months for at least one year. Of the 13 subjects unable topatients who did not achieve a CR at the three-month assessment, nine subjectspatients elected additional treatment. From these nine, two became CRs after receiving maintenance dosing. Treatment Arm B was added to evaluate a longer induction cycle.cycle using the same dose. In Treatment Arm B, 23 subjectspatients in the induction phase received 12 consecutive once-weekly instillations of 30 mg Vicinium.Vicineum. At the three-month assessment, the combined CR rate for both treatment arms was 40%. At the 12-month assessment, the CR rate in Treatment Arm A was 13%, but 17% in Treatment Arm B. Of those subjectspatients who did not achieve a CR at the three-month assessment, 73% had either a reduction in tumor size or did not experience further tumor growth.
The following charts demonstrate the responses in this Phase 2 clinical trial in Treatment Arm A and Treatment Arm B. The data below shows the percentage change in surface area of cancer within the bladder, based on bladder mapping data utilizing cystoscopy in 40 subjects.patients. The following charts demonstrate the responses in this Phase 2 clinical trial in Treatment Arm A and Treatment Arm B:

sesn-20211231_g2.jpg
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sesn-20211231_g3.jpg
This Phase 2 clinical trial was completed in September 2009.

Near the completion of this Phase 2 clinical trial in 2009, Valstar was re-launched in the United States for the treatment of BCG-refractory CIS bladder cancer in subjectspatients for whom immediate cystectomy would be associated with unacceptable morbidity or mortality. However, because physicians were not widely prescribing Valstar to their patients and it was not an approved therapy in Europe, this disrupted our originally designed clinical path of a head-to-head pivotal Phase 3 clinical trial of ViciniumVicineum against Valstar. Due to the uncertainty of the standard of care in this space, our efforts were put on hold until a clear clinical path was established. In May 2013, the FDA co-sponsored a public workshop where it evaluated potential trial designs for the development of therapies for NMIBC and specifically provided regulatory guidance supporting the idea that a single-arm clinical trial could provide sufficient evidence of benefit if the results were robust. The panel suggested it is acceptable to include high-gradehigh-risk papillary subjectspatients without CIS in a clinical trial with CIS subjectspatients because the clinical management and outcome if left untreated is considered to be the same. Thereafter,In September 2014, we began discussionsconducted an end of Phase 2 meeting with the FDA and, consistent with our interactions with the FDA during this meeting, refocused our resources to commence an open-label, non-randomized Phase 3 clinical trial of ViciniumVicineum in subjects with high-grade NMIBC.BCG-unresponsive NMIBC, which ended up being our Phase 3 VISTA Trial.
Safety data. data
We believe that our safety data from 110 subjectspatients in our Phase 1 and Phase 2 clinical trials support further development of Vicinium.Vicineum for the treatment of NMIBC BCG failures. There were no Grade 4 or Grade 5 serious adverse events that were considered by the clinical investigators to be related to Vicinium.Vicineum during the Phase 1 and Phase 2 clinical trials of Vicineum for the treatment of NMIBC BCG failures. There was one Grade 5 serious adverse event, or death, which was determined by the clinical investigator to be unrelated to Vicinium.Vicineum. The most common reported treatment-related adverse events were an abnormally frequent passage of small amounts of urine, blood in the urine and painful urination, the majority of which were considered to be mild or moderate in severity. No subjectspatients discontinued treatment due to a Vicinium-relatedVicineum-related adverse event during the Phase 1 and Phase 2 clinical trials.
ViciniumOutside of United States ("OUS") Business Development Partnering
Greater China
On July 30, 2020, we and our wholly-owned subsidiary, Viventia Bio, Inc., entered into an exclusive license agreement with Qilu Pharmaceutical, Co., Ltd. ("Qilu") pursuant to which we granted Qilu an exclusive, sublicensable, royalty-bearing license, under certain intellectual property owned or exclusively licensed by us, to develop, manufacture and commercialize Vicineum
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for the treatment of BCG-unresponsive NMIBC and other types of cancer in China, Hong Kong, Macau and Taiwan. We also granted Qilu a non-exclusive, sublicensable, royalty-bearing sublicense, under certain other intellectual property licensed by us to develop, manufacture and commercialize Vicineum in Greater China. We retain (i) development and commercialization rights in the rest of the world excluding Greater China, the Middle East and North Africa region (“MENA”) and Turkey and (ii) manufacturing rights with respect to Vicineum in the rest of the world excluding Greater China.
During 2020, we received a total of $10 million in net proceeds associated with the Qilu License Agreement. We are also entitled to receive up to an additional $23 million upon the achievement of certain technology transfer, development and regulatory milestones, as well as a 12% royalty based upon annual net sales of Vicineum in Greater China. The royalties are payable upon the first commercial sale of Vicineum in a region and continuing until the latest of (i) twelve years after the first commercial sale of Vicineum in such region, (ii) the expiration of the last valid patent claim covering or claiming the composition of matter, method of treatment, or method of manufacture of Vicineum in such region, and (iii) the expiration of regulatory or data exclusivity for Vicineum in such region. The royalty rate is subject to reduction under certain circumstances, including when there is no valid claim of a licensed patent that covers Vicineum in a particular region or no data or regulatory exclusivity of Vicineum in a particular region.
Qilu is responsible for all costs related to developing, obtaining regulatory approval of and commercializing Vicineum for the prevention and treatment of cancers including, but not limited to, NMIBC and various sub-types of NMIBC (the “Field”) in Greater China. Qilu is required to use commercially reasonable efforts to develop, seek regulatory approval for, and commercialize Vicineum in the Field in Greater China. A joint development committee was established between us and Qilu to coordinate and review the development, manufacturing and commercialization plans with respect to Vicineum in Greater China. We and Qilu also executed the terms and conditions of a supply agreement and related quality agreement pursuant to which we will manufacture or have manufactured and supply Qilu with all quantities of Vicineum necessary for Qilu to develop and commercialize Vicineum in the Field in Greater China until we have completed manufacturing technology transfer to Qilu and approval of a Qilu manufactured product by the National Medical Products Administration in China ("NMPA") for Vicineum has been obtained.
The Qilu License Agreement will expire on a licensed product-by-licensed product and region-by-region basis on the date of the expiration of all applicable Royalty Terms. Either party may terminate the Qilu License Agreement for the other party’s material breach following a cure period or upon certain insolvency events. Qilu has the right to receive a refund of all amounts paid to us in the event the Qilu License Agreement is terminated under certain circumstances. The Qilu License Agreement includes customary representations and warranties, covenants and indemnification obligations for a transaction of this nature.
The Investigational New Drug application ("IND") for Vicineum submitted by Qilu to the Center for Drug Evaluation of the China National Medical Products Administration was accepted for review in January 2021 and approved in March 2021, resulting in a $3 million milestone payment from Qilu, the first milestone payment out of the $23 million in potential milestone payments. We recorded $2.8 million (net of VAT) as license revenue during the three-month period ended March 31, 2021.
In June 2021, the Qilu License Agreement was recognized by Shandong Province, Bureau of Science and Technology as "Technology Transfer". An agreement that is designated as a Technology Transfer shall be entitled to a tax incentive of value-added tax ("VAT") recovery. As such, we recorded $0.9 million of revenue during the three months ended June 30, 2021 for additional purchase price resulting from Qilu's obligation to pay Sesen an amount equal to its recovery of VAT. We will not be subject to VAT on future potential milestone payments.
On July 20, 2021 we and Qilu announced the enrollment of the first patient in China in a Phase 3 clinical trial development plan
Based upon our September 2014 end of Phase 2 meeting withto assess the FDA, we, through our recently acquired subsidiary Viventia, commenced an open-label, non-randomized Phase 3 clinical trial of Vicinium in subjects with high-grade NMIBC who have received two courses of BCG, and whose disease is now BCG-unresponsive, and for whom the current standard of care is the surgical removal of their bladder, or a radical cystectomy, in the third quarter of 2015 in the United States and Canada. Based on safety and efficacy data observed with the longer 12-week induction in our Phase 2 clinical trial, the FDA agreed to our plan to employ more frequent dosing in our Phase 3 clinical trial, in which the primary end points are CR and DoR in subjects with CIS whose disease is BCG-unresponsive. In November 2016, the FDA provided draft guidance regarding appropriate clinical trial design for new therapies for NMIBC, including the use of single-arm studies, and we believe that our Phase 3 clinical trial design is consistent with the FDA’s draft guidance. We anticipate complete enrollment in this clinical trial in the second half of 2017 with topline data in 2018. If this Phase 3 clinical trial is successful, we intend to initially pursue regulatory approval in the United States and Canada.
As part of this trial, in July 2015, we submitted a Clinical Trial Application, or CTA, to Health Canada to include Canadian sites. In September 2015, we received a No Objection Letter from Health Canada, permitting us to proceed with our Phase 3 clinical trial in Canada. Assuming that we receive positive data in our Phase 3 clinical trial, we intend to initiate discussions with the EMA regarding a regulatory pathway for E.U. approval.
Our Phase 3 clinical trial protocol is as follows:
Dose30 mg of Vicinium (in 50 mL of saline)
Estimated total enrollment134 subjects, including 77 CIS subjects whose disease is refractory to or relapsed within 6 months of the last dose of adequate BCG treatment
Primary endpointComplete response rate in subjects with CIS (with or without papillary disease) whose disease is refractory or relapsed in six months or less following adequate BCG treatment, which is defined as at least two courses of full dose BCG; and
DoR will be estimated (Kaplan-Meier Estimate) for those subjects with CIS whose disease is refractory to or relapsed within 6 months of the last dose of adequate BCG treatment (with or without papillary disease) who experience a complete response.

Subjects with CIS will be considered to have a complete response if at the time of any disease status evaluation (per protocol every 13 weeks or any unscheduled evaluation) there is no evidence of high-grade disease (CIS, high-grade Ta or high-grade T1 disease) or disease progression (e.g., to muscle invasive disease). Low-grade disease is not considered a treatment failure in these subjects and they may remain on study treatment following TURBT.
Secondary endpointsComplete response rate and DoR in subjects with CIS whose disease is refractory to or relapsed within 6 months of the last dose of adequate BCG treatment (with or without papillary disease) whose disease is refractory or relapsed from six months to 11 months following adequate BCG treatment;
Complete response rate and DoR in all subjects with CIS (with or without papillary disease) following adequate BCG treatment;
Event-free survival, or EFS, in all subjects;
Complete response rate in subjects at three, six, nine, 12, 15, 18, 21, and 24 months in subjects with CIS whose disease is refractory to or relapsed within 6 months of the last dose of adequate BCG treatment;
Time to cystectomy in all subjects;
Time to disease recurrence in all subjects;
Progression-free survival, or PFS, in all subjects;
Overall survival, or OS, in all subjects; and
Safety and tolerability of Vicinium therapy in all subjects.
Exploratory endpointTo evaluate biomarkers that may be associated with response or disease progression or treatment failure, which may include, for example, EpCAM status, tumor subtype morphology, furin levels in tumor cell endosomes, presence of a glycosaminoglycan coat, and presence of receptors that could impede a host anti-tumor immune response such as PD-L1.
Overall, we believe that our efficacy and safety data supportof Vicineum in patients with BCG-unresponsive NMIBC. The open-label, single-arm, multi-center bridging trial will evaluate the continuedefficacy and safety of Vicineum in approximately 53 patients with carcinoma in situ (CIS) with or without papillary disease, high-grade Ta papillary disease or T1 papillary disease of any grade. Patients will be required to have failed previous treatment with BCG for inclusion in the trial. The primary endpoints are the complete response rate (for CIS patients) and the recurrence-free rate (for papillary patients) at six months, with the complete response rate and the recurrence-free rate at three months, safety and tolerability as the secondary endpoints. Based on the Qilu License Agreement, the trial is being run at the sole cost of Qilu.
MENA
On November 30, 2020, we and our wholly owned subsidiary, Viventia Bio, Inc., entered into an exclusive license agreement with Hikma Pharmaceuticals LLC, to develop and commercialize Vicineum for the treatment of BCG-unresponsive NMIBC in the MENA region (20 countries in the Middle East and North Africa). In consideration for the rights granted by us, Hikma agreed to pay to us an upfront payment, sales related milestones payments, and royalties on net sales in the MENA region for the term of the Hikma License Agreement.

Turkey
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On August 5, 2021, we entered into an exclusive license agreement with EIP pursuant to which we granted EIP an exclusive license to register and commercialize Vicineum for the treatment of BCG-unresponsive NMIBC in Turkey and Northern Cyprus. Under the terms of the license agreement, we are entitled to receive an upfront payment of $1.5 million. We are in the process of amending the license agreement to defer payment of the upfront payment to coincide with the potential FDA approval of Vicineum. We are also eligible to receive additional regulatory and commercial milestone payments of $2.0 million and are entitled to receive a 30% royalty on net sales in Turkey and Northern Cyprus.
Vicineum for the Treatment of SCCHN
Vicineum (formerly referred to as Proxinium in publications, focused on this clinical development of Vicinium to fulfill a significant unmet medical need in subjects with high-grade NMIBC.
Proxinium
Overview
Our second most advanced locally-administered product candidate, Proxinium,setting), is also being developed as a treatment for subjectspatients with recurrent, locally advanced or metastatic EpCAM-expressing squamous cell carcinoma of the head and neck (SCCHN)SCCHN who have received at least one prior platinum-based chemotherapy regimen with recurrent, locally advanced or metastatic EpCAM-expressing SCCHN. Proxinium utilizes an immunogenic cytotoxic protein payload that is a truncated form of ETA produced by the bacterial, Pseudomonas, and is designed to target EpCAM-positive cancer cells, while minimizing toxicity to non-cancerous cells. Proxiniumregimen. To treat SCCHN, Vicineum is administered via injection directly into the targeted tumor, or intratumoral injection. ProxiniumVicineum for the treatment of SCCHN has received Orphan Drug Designation from the FDA and the EMA and Fast Track designation from the FDA.
In our two Phase 1 clinical trials subjectsencompassing 44 patients treated with Proxinium had demonstrated antiitumor activityVicineum, a complete resolution or reduction in 53%size of injected tumors was observed in 16 of the 30 evaluable subjectspatients (53%) with EpCAM-expressing tumors as assessed by Investigator’sthe investigators’ clinical measurements, Investigator’sthe investigators' overall assessment including qualitative changes and assessment of available radiologic data. In addition, three out of the four subjects with complete responses of injected tumors had regression or complete resolution of adjacent non injected lesions. In a Phase 2 clinical trial, we observed tumor shrinkage in 10 of the 14 evaluable subjects (71.4%). Combined results from two Phase 1 clinical trials encompassing 44 subjects have shown complete resolution or reduction in size of injected tumors in 16 of the 30 evaluable EpCAM-positive subjects (53.3%). An additional 27% of evaluable subjectspatients had stable disease and, therefore, the results indicate an overall tumor control rate of approximately 80%. ProxiniumIn addition, three out of the four patients with CRs of injected tumors had regression or complete resolution of adjacent non-injected lesions. Vicineum was generally well-tolerated during the clinical trials. Dose-limiting toxicity in the Phase I1 clinical trials was transaminase elevation in liver enzymes..enzymes.
In our clinical trials involving Proxinium,Vicineum for the treatment of SCCHN, we have also observed some stabilization, partial reduction and complete resolution of non-injected tumors. We believe that TPTTFPT mediated killing of cancer cells leads tooccurs via a selective release of cancer antigens into the local tumor environment,mechanism known as ICD, which is driven byknown to enhance the presentation of neoantigens to the immune system. We believe that this, combined with the immunogenic nature of our immunogenic cytotoxic protein payload that creates a heightened cross priming effect, wherebyimmune response, wherein naive cytotoxic T cellsT-cells are stimulated by antigen presenting cells, such as dendritic

cells, presenting tumor cell surface antigens following the death of cancer cells. We believe that this anti-tumor response may complement checkpoint inhibitor therapies.
We intend to initiate a Phase 1/2aIn our clinical trial of Proxinium in combination with a checkpoint inhibitor in the second half of 2017. We anticipate that the Phase 1/2a clinical trial will explore the potential for Proxinium, due to its potential immunogenic effect, to enhance checkpoint inhibitors in combination therapytrials involving Vicineum for the treatment of SCCHN. We will be measuring both the objective response rates and immune response biomarkers in the Phase 1/2a clinical trial. Should the trial yield encouraging results and we are able to secure additional funding, we will move into later stage trials.
During a Type C meeting with FDA in 2007, the FDA noted that approval of a companion diagnostic for EpCAM expression would need to coincide with Proxinium approval. However, during the clinical evaluation of Proxinium, we developed an immunohistochemical test to determine whether clinical trial subjects are EpCAM positive. Internal examination from head and neck cancer subjects showed that our EpCAM antibody bound to 84% of all subject samples. We intend to seek the FDA’s input as to whether this immunohistochemical test satisfies the FDA’s request for a companion diagnostic for EpCAM expression and whether we will need to submit this test for pre-market approval as a companion diagnostic in conjunction with Proxinium.
Overall, we believe that our efficacy and safety data support the continued clinical development of Proxinium to fulfill a significant unmet medical need in subjects with recurrent, locally advanced or metastatic EpCAM-expressing SCCHN.
We believe the local administration of Proxinium mediates tumor cell killing leading to the release of tumor-specific antigens that may generate a cross-priming effect. Proxinium, like Vicinium, contains ETA, an immunogenic cytotoxic payload. The local activation of an anti-ETA response may further heighten the cross-priming response. We also believe that the effect of checkpoint inhibitors may be enhanced if they are used in combination with Proxinium due to its potential immunogenic effect.
We own or exclusively license worldwide rights to our Proxinium intellectual property portfolio that provides unextended patent term until 2024 and, if our pending composition of matter patent applications for Proxinium are granted, until at least 2036. See ‘‘Business-Intellectual Property’’ for additional details.
Disease overview
Head and neck cancers, which include cancers of the oral cavity, pharynx and larynx, are collectively the sixth most common cancers in the world. Head and neck cancer develops from the mucosal linings of the upper aerodigestive tract, comprising of the nasal cavity and paranasal sinuses, the nasopharynx, the hypopharynx, larynx, and trachea, and the oral cavity and oropharynx. Squamous cell carcinoma is the most frequent malignant tumor of the head and neck region. Invasive head and neck cancers arise in most cases from preneoplastic lesions grouped under the term dysplasia. Dysplastic lesions present with an increased likelihood of progressing to squamous cell carcinoma. The altered epithelium displays architectural and cytological changes that range from mild to severe.
There are approximately 650,000 new cases annually and nearly 350,000 deaths due to head and neck cancer. In head and neck cancer, approximately 40% to 60% of deaths result from local or regional disease. The American Cancer Society estimated thatSCCHN, there would be approximately 59,340 new cases of head and neck cancers in the United States in 2015, of which 45,780 cases would be attributed to cancers of the oral cavity and pharynx and 13,560 cases would be attributed to cancer of the larynx, and 8,650 deaths. Most of head and neck cancers are biologically similar with more than 90% being squamous cell carcinomas that commonly originate in the epithelium. They are strongly associated, more so than other cancers, with certain environmental and lifestyle risk factors, and worldwide incidence exceeds 500,000 cases annually.
New treatment modalities have been undermined by the approximately 10% to 25% of cured patients who subsequently develop second primary tumors due to field cancerization. These second primary tumors are one of the leading factors in the 40% to 50% five year survival rate. Based on our immunohistochemical test used during our clinical trials of Proxinium, we believe that approximately 84% of late-stage SCCHN are EpCAM positive. We are initially developing Proxinium to potentially address late-stage SCCHN. We would expect that, if Proxinium is approved by the FDA, patients would receive treatment until disease progression.

Current approaches to treatment
Existing treatment options for SCCHN include immunotherapy (checkpoint inhibitors), surgery, drug therapies, radiation therapy or a combination of therapies. There is no standard treatment option for patients who progress after receiving these treatments. Approximately 60% of patients with head and neck cancer have locally recurrent disease and distant metastases occur in 20% to 30% of patients.
Currently, Erbitux, an anti-epidermal growth factor receptor antibody, is the only FDA approved tumor-targeted therapy for the treatment of late-stage SCCHN. Erbitux has been approved as a first-line therapy for late-stage SCCHN in combination with platinum-based therapy plus fluorouracil. Erbitux has also attained approval as a monotherapy or in combination with radiation therapy for second-line treatment of late-stage SCCHN in patients that have failed platinum-based therapy.
The five year survival rate for patients with locally recurrent disease is reported to be 40% to 50% and loco-regional recurrence is the predominant cause of failure and up to 70% of such patients have advanced disease. In addition, more than 50% of all patients who die from head and neck cancers have loco-regional disease as the only site of failure. If head and neck cancers are not controlled locally, they can infringe on the esophagus and airway, compromising nutrition and respiratory functions and often resulting in significant anatomic disfigurement. As such, the management of locally recurrent disease requires a multidisciplinary approach involving an array of specialists with an expertise in head and neck cancers.
Most recently checkpoint inhibitors have entered into use in the treatment of SCCHN. Two checkpoint inhibitors that target PD-1, pembrolizumab and nivolumab, have now received approval for the treatment of SCCHN. Nivolumab was granted FDA approval for the treatment of patients with SCCHN who have progressed on or after platinum-based chemotherapy. Nivolumab-treated subjects had a 30% reduction in the risk of death; a median OS of 7.5 months for nivolumab and 5.1 months for investigator's choice, or IC. There were no statistically significant differences between the two arms for progression-free survival or objective response rate, or ORR (13.3% versus 5.8% for nivolumab and IC, respectively). Pembrolizumab was granted accelerated approval by the FDA for the treatment of patients with SCCHN who have progressed on or after platinum-based chemotherapy. The major efficacy outcome measures were ORR according to Response Evaluation Criteria in Solid Tumors, or RECIST version 1.1, as assessed by blinded independent central review, and duration of response. The ORR was 16% (95% CI: 11, 22) with a complete response rate of 5%.
Clinical trials and pre-clinical studies
Pre-clinical studies. Pre-clinical data from in vitro and in vivo studies of Proxinium have demonstrated the potential to be safe in humans and to have clinical activity. In vitro pharmacology studies have demonstrated that Proxinium exhibits potent cytotoxicity against numerous EpCAM-positive cell lines, including SCCHN, bladder tumor and prostate tumor cell lines. Proxinium has also demonstrated anti-tumor activity in several human tumor xenograft animal models expressing EpCAM, including those derived from human squamous cell carcinomas and in a lung cancer subject derived xenograft, or PDX, model. In the PDX model, mice were engrafted with human bone marrow cells were each implanted with two subcutaneous EpCAM positive human PDX tumors. Tumor-bearing animals were treated with Proxinium alone in one tumor, an anti-PD-1 checkpoint inhibitor alone given systemically, or a combination of the two. Intratumoral injection of Proxinium into the tumor xenograft located on one side of the animal was able to block the growth of the tumor while also having a quantifiable anti-tumor effect on the un-injected tumor on the opposite flank. In contrast, the checkpoint inhibitor alone had little effect on tumor growth but appeared to amplify Proxinium’s activity on the uninjected tumor.


Proxinium treatment alone was also observed to increase the numbers of CD8+ T cells, an important cytotoxic immune cell population, in the blood. We believe that this indicates that the checkpoint inhibitor alone was ineffective in initiating the anti-tumor effects of immune cells without the prior activation of cancer specific immune cells by a cytotoxic regimen, such as Proxinium.
Further, synergistic and additive effects were observed in these in vitro pharmacology studies with Proxinium in combination with various anti-cancer agents, as well as with radiation therapy. Toxicological studies in Sprague-Dawley rats showed no clear evidence of systemic toxicity whether given via intradermal or subcutaneous injection. The only dose-related reactions were at the injection site with most lesions resolving by the end of the observation period. Plasma concentrations of animal in a seven-day toxicology study conducted in Sprague-Dawley rats were 50 ng/mL at four hours after squamous cell injection and approximately 1,000 ng/mL at 10 minutes following intravenous injection on day one. These blood levels are approximately 5- and 100-fold higher, respectively, than the mean Cmax measured in subjects administered 700 mg weekly for four weeks (10,936 pg/mL) through the intratumoral route. In in vivo pharmacology studies in human tumor xenograft mouse models, we observed evidence of tumor growth suppression.
In summary, in vitro and in vivo pre-clinical data have shown that the anti-cancer agent Proxinium preferentially binds to tumor cells and has an acceptable safety profile. The local and systemic toxicological profile for Proxinium in Sprague-Dawley rats has been defined with toxicological effects at doses 1,000-fold greater than the IC50 for activity on tumor cells.
First Phase 1 clinical trial. We initiated an open-label, dose-escalating Phase 1 clinical trial of Proxinium in December 2003 at three sites in Russia. We enrolled 24 subjects with late-stage SCCHN who had previously undergone prior radiation therapy, with a majority having completed at least one chemotherapy cycle. In addition, based on our immunohistochemical test

used during this Phase 1 clinical trial of Proxinium, 17 of the 24 subjects (70.8%) enrolled in this Phase 1 clinical trial had tumors that tested positive for EpCAM. The Phase 1 clinical trial was designed to determine the maximum tolerated dose and the recommended Phase 2 dose. Secondary objectives included evaluation of safety, tolerability, PK profile and efficacy endpoints.
In addition, information on PK properties and immunogenicity, as well as a preliminary assessment of tumor response, was obtained.
Subjects received two cycles of Proxinium administered once per day for five consecutive days, with doses ranging from 20 µg to 280 µg, followed by 23 days off. Two DLTs occurred at the 280 µg dose level, establishing 200 µg as the maximum tolerated dose. The DLTs observed in the two subjects were elevated liver enzyme tests, which were not associated with any signs of liver damage or toxicity, were asymptomatic and were transient as they resolved to baseline values.
Objective anti-tumor responses were measured by caliper, CT scans and digital photography from baseline to final assessment. Anti-tumor responses and stable disease were observed in six of the 14 (42.9%) and four of the 14 (28.6%) evaluable subjects with EpCAM-positive tumors, respectively, for an overall response rate of 71.4% (10 of the 14 evaluable subjects). All six of the evaluable subjects with EpCAM-negative tumors had progression of their target tumors. In addition, the 10 subjects with EpCAM-positive tumors and who had responses or stable disease had a survival time of 278 days compared with a survival time of 124 days for the six subjects with EpCAM-negative tumors. The 14 evaluable EpCAM-positive subjects had a survival time of 207 days. This Phase 1 clinical trial was completed in October 2004.
Second Phase 1 clinical trial. We initiated a second open-label, dose-escalating Phase 1 clinical trial of Proxinium in June 2004 at four sites in Brazil. We enrolled 20 subjects with late-stage SCCHN. All of the subjects enrolled in this Phase 1 clinical trial had undergone prior radiation therapy, with a majority having completed at least one chemotherapy cycle. Eighteen of the 20 subjects (90%) tested positive for EpCAM, of which two subjects were non-clinically evaluable. Preliminary efficacy data indicated 14 of the 16 evaluable EpCAM-positive subjects (87.5%) had either a ‘‘complete resolution,’’ ‘‘response’’ or ‘‘stable’’ disease of injected tumors following Proxinium treatment, with 25% of subjects achieving a ‘‘complete response’’ of the injected tumor. The second Phase 1 clinical trial was designed to determine the maximum tolerated dose and the recommended Phase 2 dose. Secondary objectives included evaluation of safety, tolerability, PK profile and efficacy endpoints.
Subjects received Proxinium once weekly for four weeks with initial doses ranging from 100 µg to 930 µg, followed up by four weeks with once weekly doses ranging from 100 µg to 930 µg. The maximum tolerated dose was established at 700 µg, based on the occurrence of DLTs in two of the five subjects at the 930 µg dose level cohort. The DLTs observed in the two subjects were elevated liver enzyme tests. In both cases, the elevated liver enzyme tests were not associated with any signs of liver damage or toxicity, were asymptomatic, and resolved to baseline values.
Therapeutic exploratory endpoints were analyzed to evaluate the tumor response and anti-tumor activity of Proxinium. RECIST criteria were not used in this Phase 1 clinical trial and instead the clinical investigator used the following definitions for tumor responses: ‘‘complete response’’ was the complete clinical resolution of a tumor (injected or non injected), ‘‘response’’ was defined as clinically and radiologically documented reduction in the size of the target tumor indicative of anti-tumor activity from baseline to final, ‘‘stable’’ was defined as no change in the disease state captured through clinical or radiological assessments from baseline to final and ‘‘progression’’ was defined as an increase in the size of the target tumor from baseline to the final assessment.
The following table demonstrates the response rate of subjects with EpCAM-positive tumors in this Phase 1 clinical trial:
Number ofComplete StableResponse of
evaluable subjectsresponseResponseresponseprogression
16.................................4 of the 166 of the 164 of the 162 of the 16
 (25.0%)(37.5%)(25.0%)(12.5%)
An example of a ‘‘complete’’ response obtained in a Proxinium injected tumor in the second Phase 1 clinical trial can be seen in FIGURE 1, FIGURE 2, FIGURE 3 and FIGURE 4 below

.
A non injected tumor response was observed in four of the 20 subjects (20%) in the second Phase 1 clinical trial where subjects were administered Proxinium weekly and one of the 15 subjects (6.7%) in the Phase 2 clinical trial, which is discussed below, where subjects were administered Proxinium weekly. In such cases, tumor responses were seen in loco-regional tumors that themselves had not been injected with Proxinium, but were adjacent to, and in one case bi-lateral to the injected tumor. An example of a non-target tumor response is shown in FIGURE 3 and FIGURE 4 above. We believe that this non-target tumor response may be a consequence of surrounding cancer cells dying in response to Proxinium through diffusion (or the local spread of Proxinium) and cross priming of the immune system or the selective release of cancer antigens into the local immune tumor environment. This Phase 1 clinical trial was completed in March 2005.
Phase 2 clinical trial. We submitted the IND for Proxinium to the FDA in August 2005. We initiated an open-label Phase 2 clinical trial of Proxinium in March 2006 at nine sites in Canada and twenty-one sites in the United States. We enrolled 15 subjects with refractory locally recurrent disease, which means that the subject must have progressed on or after receiving, or was unable to tolerate, at least one anti-cancer treatment regimen or had to have previously documented refusal of treatment for locally recurrent disease. The Phase 2 clinical trial was designed to determine the safety, tolerability and recommended dose of intratumorally injected Proxinium. Secondary objectives were to evaluate principal target tumor and target tumor response rates, determine the time to progression of the principal target tumor, overall survival time and progression-free survival, and also to confirm the PK profile and assess immunogenicity of intratumorally injected Proxinium.
The dosing regimen for our Phase 2 clinical trial included intratumoral injections once per week at 500µg or 700µg. Although the small sample size does not allow for statistical evaluation of treatment effects, it was expected that the Phase 2 clinical trial would provide some additional evidence of the therapeutic effect of Proxinium for control of local or regional late-stage SCCHN, as well as a survival benefit for those subjects. To be eligible for measurement of a radiographically confirmed response, a subject had to have a radiographic assessment at baseline/day one and at least two additional radiographic assessments, not less than four weeks apart, after day one. According to this definition, eight subjects were eligible for a principal tumor radiological response evaluation. In order to assess best tumor response, at least two CT scans, one at baseline

and one post-baseline, were required. Best tumor response was defined in this Phase 2 clinical trial as the greatest degree of decrease in tumor size observed throughout the clinical trial. Bidimensional tumor measurements were used to determine tumor size. Bidimensional measurements of a tumor were based on its longest diameter and the greatest perpendicular measurement from this diameter from CT scans.
RECIST criteria were not used in this Phase 2 clinical trial and instead the clinical investigator used the following definitions for tumor responses. A ‘‘complete response’’ was defined in this Phase 2 clinical trial as the clinically and radiologically documented complete disappearance of the principal target tumor or other target tumors, based on bidimensional measurement as determined by two radiological observations not less than four weeks apart. A ‘‘partial response’’ was defined in this Phase 2 clinical trial as a 50% or more decrease of the bidimensional measurements in the principal target tumor that had been measured as compared to baseline. ‘‘Progressive disease’’ was defined in this Phase 2 clinical trial as either: at least a 25% increase of the bidimensional measurements for tumors greater than four cm2 or at least a 50% increase of the bidimensional measurements for tumors less than four cm2 in the principal target tumor as compared to the nadir, which was defined in this Phase 2 clinical trial as the smallest radiologically determined tumor size achieved during the clinical trial. ‘‘Stable disease’’ was defined in this Phase 2 clinical trial as disease that meets neither the ‘‘partial response’’ nor the ‘‘progressive disease’’ criteria during or following active treatment and based on the sum of its bidimensional measurements, includes a less than 25% increase in tumor size for tumors greater than four cm2, or a less than 50% increase in tumor size for tumors less than four cm2. Tumor measurements that were radiographically confirmed showed that four of the eight evaluable subjects (50%) demonstrated ‘‘stable disease’’ for their principal tumor.
When radiographic best responses were evaluated at any two treatment time points, including baseline, 13 of the 14 evaluable subjects (92.9%) showed ‘‘stable disease’’ or partial response, with 10 of the 14 evaluable subjects (71.4%) showing a decrease in tumor size ranging from 4% to 85%. Measurements of the principal target tumors taken at baseline and at final visit showed that three of the eight evaluable subjects (37.5%) had decreases in principal tumor size ranging from 4% to 35%. Of five subjects with multiple tumors who achieved primary tumor responses, four of those subjects also achieved responses in subsequently injected non-primary tumors. These results suggest that Proxinium may be effective in the treatment of EpCAM-positive late-stage SCCHN.
This Phase 2 clinical trial was completed in August 2007.
Phase 3 clinical trial. We initiated a randomized Phase 3 clinical trial of Proxinium in January 2006 at 75 sites globally. Total enrollment was planned for 292 subjects with late-stage SCCHN and the protocol included two periods: a Phase 2 lead-in period comprised of 30 subjects and a Phase 3 period comprised of 262 subjects. Each subject’s locally recurrent disease had to be refractory, which means that the subject must have progressed on or after receiving, or was unable to tolerate, at least one anti-cancer treatment regimen or had to have previously documented refusal of treatment for locally recurrent disease.
This Phase 3 clinical trial was conducted to compare the overall survival time associated with intratumorally injected Proxinium and safety and efficacy data of Proxinium in combination with BSC versus BSC alone, in subjects with locally recurrent disease who had received at least one anti-cancer treatment regimen for such locally recurrent disease. Secondary objectives were to compare the loco-regional response rate and duration of loco-regional response, the local progression-free survival, symptomatic benefit and safety profile for subjects from the Proxinium in combination with BSC arm and the BSC alone arm.
During the treatment phase of this Phase 3 clinical trial, all subjects were assessed weekly and treated according to institutional standards of BSC, which included treatment measures such as the use of pain medication, hydration, antiemetics and nutritional support, but did not include the use of radiotherapy (except as needed for the palliation of distant metastases) or any agent that may have had an impact on tumor response. Subjects who were randomized to the BSC alone arm were either seen in the clinic or had weekly assessments conducted by phone; provided that at least one in-person visit was conducted every four weeks. Subjects who were randomized to Proxinium in combination with the BSC arm were also to receive BSC, as well as a once weekly intratumoral injection of Proxinium at 700 µg per dose. Subjects in both arms of this Phase 3 clinical trial continued in the treatment phase until either complete resolution of all target tumors or radiographic tumor progression occurred. All subjects were then to remain in the follow-up phase until one of the following occurred: (i) 12 months from the date that the last subject required for efficacy analyses had been randomized, died, withdrew or we terminated the trial or (ii) termination of the trial for safety reasons due to DLTs.
The intention of the Phase 2 period of the clinical trial was evaluation of available data once the first 30 subjects reached the four week treatment time point. Of the first 30 subjects enrolled, 15 were randomized to each study arm. The Phase 2 lead in period was specifically designed for the assessment of safety, with an independent review of the safety data by the

data safety monitoring board, or DSMB. Following the review by the DSMB, they recommended the continuation of enrollment and monitoring as mandated by the protocol since the available data indicated that intratumoral administration of Proxinium was generally well-tolerated by the subjects. The Phase 3 period began immediately after the conclusion of the Phase 2 period, with no pause in enrollment.
There were 62 subjects for which post-treatment tumor measurements were available, 36 subjects in the Proxinium in combination with the BSC arm and 26 subjects in the BSC alone arm. Responses in FIGURE 5 below represent the best percentage change in radiographically determined bidimensional measurement from baseline at any time point for the injected tumor. Of the Proxinium in combination with BSC arm, 19 of the 36 subjects (52.8%) showed tumor reduction with a median reduction in bidimensional tumor measurement of 48.3%. In contrast, only 10 of the 26 subjects (38.5%) of the BSC alone arm showed a median reduction in tumor size of 21.9%. With respect to the subjects for whom the best bidimensional percent change showed an increase in tumor size, the Proxinium in combination with BSC arm had 12 of the 36 subjects (33.3%) showing a median increase of 31.7%. The increase in tumor size was more pronounced in the BSC alone arm with 11 of the 26 subjects (42.3%) showing a median increase of 60.8%.
Targeted tumor responses in FIGURE 5 below were categorized as complete, partial, stable or progressive disease. A complete response was defined as radiographically confirmed complete disappearance of disease, partial response as a 50% or more decrease of the sum of the product of the bidimensional measurements as compared to baseline, and progressive disease as at least a 25% increase in the sum of the products of the bidimensional measurements compared to the radiographic nadir, when the sum at baseline was greater than four cm2 or at least a 50% increase of the sum of the product(s) of the bidimensional measurements compared to the radiographic nadir, when the sum at baseline was less than or equal to four cm2. Stable disease was defined as the response when neither the complete response, partial response nor the progressive disease criteria were met.
This Phase 3 clinical trial was terminated in April 2008 because of challenges relating to subject enrollment and retention for reasons specific to emerging markets, but not due to safety or efficacy concerns. Clinical trial subject enrollment and retention in emerging markets presents unique challenges compared to North America. With fewer established options for communicating with existing and new subjects, emerging market study centers have difficulty acquiring new subjects as well as maintaining consistent contact with existing subjects, making follow up very difficult. We do not believe these issues will pose the same challenges in a North American clinical trial. In the United States, study centers have established multiple options to enroll and remain in communication with subjects.

At the time this Phase 3 clinical trial was terminated, 166 subjects had been randomized in the trial. Of these, 82 subjects were randomized to the Proxinium treatment in combination with the BSC arm and 84 subjects were randomized to the BSC alone arm (as discussed below).
Safety data. We believe that our safety and anti-tumor activity data in our two Phase 1 clinical trials, our Phase 2 clinical trial, and our partially completed Phase 3 clinical trial support further development of Proxinium. There were no Grade 5 serious adverse events that were considered by the clinical investigator to be related to Proxinium.Vicineum. The serious adverse events (Grade 3 and Grade 4) that were reported in the clinical trials of ProxiniumVicineum for the treatment of SCCHN and were considered to be possibly, probably or definitely related to treatment consisted of abnormal tumor growth, anorexia, cancer pain, decrease in red blood cells, difficulty swallowing, elevated calcium levels, facial pain, fatigue, high blood sugar, influenza like illness, injection site pain, liver function abnormalities, low albumin level, low sodium concentration, nausea, rash, swelling, tumor hemorrhage and tumor necrosis.
SevenFor the combined Phase 1 (VB4-101 and VB4-101A) and Phase 2 (VB4-845-01-IIA) studies, seven subjects died during the clinical trials of Proxinium,Vicineum for the treatment of SCCHN, but none of the deaths were deemed to be related to Proxinium. Eleven subjectsVicineum-related. Out of the four patients who discontinued treatment due to liver function test abnormalities; however, the serum levelsabnormalities, 2 subjects were transientin study VB4-101 and they eventually returned to baseline without any evidence of permanent liver damage.2 were subjects were in VB4-101A). Four subjects withdrew from the clinical trials. Three of the four subjects withdrew at their request and one of the four subjects withdrew at the request of the investigator.
Proxinium Proposed Phase 1/2a Clinical Trial Plan3 (VB4-845-01-lllA) VB4-845-01-lllA was a randomized, multicentre therapeutic confirmatory study evaluating the safety and efficacy of Vicineum plus BSC versus BSC alone in the treatment of patients with advanced SCCHN who had received at least 1 anti-cancer treatment regimen for advanced disease. One hundred and sixty-six of the approximately 292 patients were enrolled at 75 sites. The primary endpoint for the study was overall survival. A total of 166 patients had been randomized into the study. Of the 166 patients, 82 were randomized to the Vicineum treatment plus BSC arm and 84 patients were randomized to the BSC arm.
VB4-845-01-IIIA was terminated early due to a corporate decision unrelated to safety or efficacy. At the time of study termination, survival data was available for 133 of 142 patients that had been randomized. A total of 66 were enrolled on the BSC arm and 67 enrolled in the Vicineum plus BSC treatment arm. Of the 66 BSC patients enrolled in the BSC arm, there were 43 documented deaths in this treatment arm; the date of death was known for 36 patients and unknown for 7. Of the patients treated with Vicineum, 41 deaths were documented with the date of death known for 37 patients and unknown for 4.
Interim safety data was available for 132 of 139 patients that had been randomized. One hundred and eleven patients reported at least 1 AE. Thirty-six patients reported 205 adverse events (AEs) that were treatment related. Most of the treatment-related AEs were mild to moderate in severity. Of the 205 treatment-related AEs reported, there were 23 Grade 3 events and 2 Grade 4 events. There were no Grade 5 related AEs reported. The 2 related Grade 4 events were 2 occurrences of tumour necrosis in 1 patient; both were considered probably related to the treatment. Most related AEs resolved on their own and did not require additional treatment. Others were treated with concomitant medications.
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Four patients in the Vicineum plus BSC group reported Grade 3 increases in both ALT and AST. One patient reported a Grade 3 increase in ALT and another patient reported a Grade 3 increase in AST. All of the Grade 3 increases in ALT/AST occurred in the Vicineum plus BSC group. No Grade 4 increases in ALT/AST were reported. In 1 patient, Vicineum was discontinued due to liver function test abnormalities, in 1 patient Vicineum was interrupted due to liver function test abnormalities and in the last patient Vicineum was discontinued due to disease progression.
We intendhave deferred further development of Vicineum for the treatment of SCCHN in order to initiate a Phase 1/2a clinical trialfocus our efforts and our resources on our ongoing development and, if approved, the commercialization of ProxiniumVicineum for the treatment of non-muscle invasive CIS of the bladder in combinationpatients previously treated with a checkpoint inhibitor inadequate or less than adequate BCG. We are also exploring collaborations for the second halfdevelopment of 2017. We anticipate that the Phase 1/2a clinical trial will explore the potential for Proxinium, due to its potential immunogenic effect, to enhance checkpoint inhibitors in combination therapyVicineum for the treatment of SCCHN.
Overall, we believeWe own or exclusively license worldwide rights to our Vicineum for the treatment of SCCHN intellectual property portfolio that our efficacy and safety data support the continued clinical development of Proxinium to fulfill a significant unmet medical need in subjects with late-stage SCCHN.
Potential future indications
Based on the safety and efficacy data in our two Phase 1 clinical trials, our Phase 2 clinical trial and our previous partially completed Phase 3 clinical trial of Proxinium, we also believe that there are several other potential applicationsprovides for Proxinium that we may elect to pursue, including colon, thyroid and prostate cancers.an unextended patent term until 2036. See ‘‘Our Intellectual Property’’ below for additional details.
VB6-845d
Overview
Our lead systemically-administered product candidate, VB6-845d, is being developed as a treatment for multiple types of EpCAM-positive solid tumors. VB6-845d is a TPTTFPT consisting of an EpCAM targeting Fab genetically linked to deBouganin, which is administered by intravenous infusion. DeBouganin acts by inhibiting protein synthesis and helps circumvent multi-drug resistance mechanisms. EpCAM is over-expressed on the cell surface of many solid tumors, including breast, colorectal, gastric, lung, ovarian and prostate. EpCAM overexpression has been shown to be involved in promoting malignant progression. In addition, EpCAM overexpression is associated with increased tumor grade, disease progression, increased proliferative phenotypes and diminished survival. EpCAM is also a cancer stem cell marker. A Phase 1 clinical trial conducted with VB6-845, the prior version of VB6-845d, revealed no clinically relevant immune response to the deBouganin payload, and fivepayload. Five of seven subjectspatients (71.4%) maintained stable disease (meaning no change in tumor size from baseline) after one completed cycle of treatment (four weeks) two subjects. Two patients had decreases in target tumor size, and one subject who continued treatment through a third cycle (12 weeks) maintained stable disease. SafetyInterim safety data from oneour Phase 1 clinical trial was consistent with expectations for the study population of subjectspatients with advanced solid tumors and the anticipated effects of targeted biological therapies containing immunogenic sequences.
Based upon the hypersensitivity reactionsantibody responses directed against the Fab seen in our Phase 1 clinical trial conducted in Russia and in the country of Georgia, we de-immunized the Fab portion of VB6-845 to create VB6-845d. In April 2016, we submitted an IND to the FDA in preparation of initiating a Phase 1/2 clinical trial of VB6-845d in subjectspatients with EpCAM-positive cancers in the United States. The IND was withdrawn in July 2016 after we received initial feedback from the FDA indicating that they had identified hold and non-hold deficiencies that needed to be addressed. In December 2016, we submitted a request for a pre-IND meeting to seek input on the manufacturing, nonclinical and clinical plans for VB6-845d prior to resubmitting an IND. In February 2017, the FDA provided guidance on our manufacturing and nonclinical plans for VB6-845d. Based on this guidance, we are performing additional studies and an updated IND submission is planned for in the the first quarter of 2018.

Overall, we believe that our pre-clinical data and the interim Phase 1 clinical data support further clinical investigation of VB6-845d to explore whether it may fulfill the significant unmet medical need in the treatment of subjectspatients with EpCAM-positive solid tumors. Specifically, we believe that VB6-845d has potential to be a first-in-class TPTTFPT capable of providing clinical benefit in these difficult to treat patient populations.
We are currently developing VB6-845d, a recombinant fusion protein consisting of an anti-EpCAM fragment fused to a deBouganin payload for the systemic treatment of advanced solid tumors. DeBouganin acts by inhibiting protein synthesis and helps circumvent multi-drug resistance mechanisms. Solid tumors form an abnormal and discrete tumor mass in the body that usually does not contain cysts or liquid areas.
We believe that our TPTsTFPTs utilizing our de-immunized deBouganin payload may be enhanced if combined with checkpoint inhibitors. We believe that deBouganin’s potential effect on cancer cells could promote an immunogenic response that may enhance the action of checkpoint inhibitors.
We have deferred further development of VB6-845d in order to focus our efforts and our resources on our ongoing development and, if approved, commercialization of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. We are also exploring collaborations for VB6-845d.
We own or exclusively license worldwide rights to our VB6-845d intellectual property portfolio that provides for an unextended patent term until at least June 2025 and, if our pending compositionmethod of matter patenttreatment patents and applications for VB6-845d are granted, until at least 2036. See ‘‘Business-IntellectualOur Intellectual Property’’ below for additional details.
Clinical trialsLUMC
On December 8, 2020, we and pre-clinical studies
Pre-clinical studies. VB6-845,Leiden University Medical Center (“LUMC”) agreed to the prior versionco-development of VB6-845d, demonstrated strong bindingan imaging agent (the “Imaging Agent”) that is comprised of an antibody fragment of Vicineum™, and potent activity with small doses of the product candidate against numerous EpCAM-positive solid tumor cell lines, including those derived from tumors of the breast, cervix, colon, endometrium, gastric, lung and ovary, in in vitro pharmacology studies. In vitro and in vivo pre-clinical data have also demonstrated that VB6-845 preferentially binds to tumor cells expressing EpCAM andan imaging molecule supplied by LUMC. The Imaging Agent is effective in inhibiting tumor growth and increasing survival in mouse models. These xenograft studies demonstrated that VB6-845 was able to selectively affect EpCAM-expressing tumors without observed systemic toxicity.
Phase 1 clinical trial. We received regulatory approval from the Federal Service on Surveillance in Healthcare and Social Development of the Russian Federation (Roszdravnadzor) to conduct a Phase 1 clinical trial in Russia in March 2007 and from Ministry of Labour Health and Social Affairs of Georgia in April 2007. We initiated an open-label Phase 1 clinical trial of VB6-845 in May 2007 at five sites in Russia and one site in Georgia. We enrolled 15 subjects with EpCAM-positive solid tumors, including breast, colorectal, kidney, non-small cell lung, ovary, pancreas and stomach cancers. All subjects enrolled in this Phase 1 clinical trial had tumors that tested positive for EpCAM as confirmed by our immunohistochemical test used during this Phase 1 clinical trial of VB6-845. The Phase 1 clinical trial was designed to define the maximum tolerated dose and to evaluate immunogenicity, safety. Secondary objectives included information on PK properties and assessing exploratory efficacy of VB6-845.
Subjects were treated over three dose cohorts in this Phase 1 clinical trial. VB6-845 was administered as a monotherapy intravenous infusion (for a period of over three hours), once weekly in four-week cycles, to subjects with EpCAM-positive advanced solid tumors. Subjects were evaluated at the end of each cycle. Three subjects at the first cohort dose level received 1.00 mg/kg, 10 subjects at the second cohort dose level received 2.00 mg/kg and two subjects at the third cohort dose level received 3.34 mg/kg. Following treatment of the subjects in the second cohort, the clinical reporting company reviewed the safety data and unanimously decided to escalate to the third cohort at a dose of 3.34 mg/kg. Out of the first group of five subjects in the second cohort, one DLT (an infusion-related reaction) was reported and confirmed by the clinical trial monitoring company. As the study was stopped early, no maximum tolerated dose was reached. VB6-845 was generally well-tolerated up to the third dose cohort (3.34 mg/kg).
One of our primary objectives in this Phase 1 clinical trial was to validate the extensive pre-clinical data supporting de-immunization of the deBouganin cytotoxic protein payload in humans. For a payload to be viable systemically it must be de-immunized to prevent rapid clearance by the immune system. Subject blood samples for the assessment of an anti-VB6-845 response were collected pre-infusion for the first cycle and every four weeks thereafter. An analysis of the antibody titers at each time point revealed a minimal immune response directed against the deBouganin moiety for only two subjects after eight weeks. Moreover, the titer of the immune response was just above the threshold of the assay (ranging between a titer of 1500 to 1800). These findings are consistent with significant de-immunization of the parent Bouganin cytotoxic protein payload via T-cell epitope depletion.
For all cohorts, exploratory efficacy data (CT and radiographic) were available for seven subjects who completed one full cycle (four weeks) of treatment. Five of the seven subjects showed stable disease, which meansdelineate tumor measurement is unchanged relative to baseline, on CT scans one week after the completion of a fourth dose of VB6-845. Of the three subjects

who continued to receive treatment past the first cycle, one subject continued to have stable disease at the completion of their second (eight weeks) and third (12 weeks) cycles. There was radiographic evidence of decreases in tumor size in two subjects with renal cell carcinoma and breast carcinoma. For one subject, six measurable target tumors in the lungs as well as a measurable target tumor in a pulmonary lymph node and pelvic mesentery showed decreases by CT scan ranging from 11% to 29% on a final visit relative to the baseline. Other non-target, non-measurable tumors appeared unchanged; although there was an appearance of disease progression as a potentially new brain tumor, which was inaccessible to treatment. In one other subject, CT scan results revealed decreases in four of the five measurable target tumors in the liver, with decreases in individual tumors ranging from 4% to 15%. Non-target, non-measurable tumors in lungs, liver and bones showed stable disease.
This Phase 1 clinical trial was terminated in April 2008. Subjects in this Phase 1 clinical trial exhibited little to no immune responses to the deBouganin payload, thereby demonstrating de-immunization of deBouganin. Subjects did, however, generate antibodies against the Fab molecule in the product candidate, specifically against mouse amino acid sequences that were left in the Fab to increase the thermal stability in this early version of the molecule. Taken together, we believe this demonstratednormal tissue during surgery so that the subjects were fully immunocompetent, which means that they were capabletumor margin is clearly visible, thereby helping to ensure clear margins after surgical excision of rejecting the deBouganin payload if their immune system recognized it as foreign. Furthermore, it is important to note that the deBouganin payload was presented to the subjects’ immune system as a fusion with the immunogenic Fab fragment. The ‘‘hapten-carrier effect’’ principal in immunology dictates that presenting a non-immunogenic ‘‘hapten’’ protein (deBouganin) to the immune system as a conjugate or fusion to an immunogenic ‘‘carrier’’ protein (Fab with mouse amino acid sequences) is an effective way to amplify the immunogenicity of the non-immunogenic protein. Our observation of a lack of immunogenicity of deBouganin in this setting is further evidence of its de-immunization. We have since engineered these mouse amino acid sequences out of VB6-845, which we refer to as VB6-845d, and based upon a binding specificity pre-clinical study, VB6-845d retained biologic activity.
    
The chart below demonstrates why we believe that we have successfully de-immunized VB6-845 to create VB6-845d as shown by in a Phase 1 clinical trial that revealed no clinically relevant immune response to the deBouganin payload.

Safety data. We believe that our safety data from the 15 subjects in our Phase 1 clinical trial support further development of VB6-845d. There were no Grade 5 serious adverse events that were considered by the clinical investigator to be related to VB6-845. The Grade 3 and Grade 4 serious adverse events that were reported in the Phase 1 clinical trial of VB6-845 and considered to be possibly, probably or definitely related to treatment, consisting of an infusion related reaction and an infusion site reaction that are consistent with the immunogenic nature of the Fab fragment. The subject’s condition improved and the event was considered to be resolved one day after onset without any further clinical concerns. The subject with the infusion related reaction was discontinued from the Phase 1 clinical trial in accordance with the protocol treatment stopping criteria defined for Grade 4 serious adverse events. The adverse event data reported for the subjects at the time the Phase 1 clinical trial was terminated was based upon interim data.
VB6-845d Phase1/2 clinical trial development plan
In April 2016, we submitted an IND to the FDA in preparation of initiating acancerous tissue. A Phase 1/2 clinical trial of VB6-845d in subjectsthe Imaging Agent was successfully completed by LUMC with EpCAM-positive cancers in the United States. The IND was withdrawn in July 2016 after we received initial feedback from the FDA indicating that they had identified holdfavorable tolerability and non-hold deficiencies that needed to be addressed. In December 2016, we submitted a request for a pre-IND meeting to seek input on the manufacturing, nonclinical and clinical plans for VB6-845d prior to resubmitting an IND. In February 2017, the FDA provided guidance on our manufacturing and nonclinical plans for VB6-845d. Based on this guidance, we are performing additional studies and an updated IND submission is planned for in the first quarter of 2018.
Overall,demonstrated tumor detection, which we believe that our pre-clinical data andfurther supports the interim Phase 1 clinical data support further clinical investigationtargeting specificity of VB6-845dVicineum. We signed an agreement with LUMC whereby we have an option to explore whether it may fulfillobtain an exclusive, worldwide license to any intellectual property related to the significant unmet medical need in the treatment of subjects with EpCAM-positive solid tumors. We also believe that the deBouganin payload in VB6-845d may enhance the action of checkpoint inhibitors as a result of the promotion of a local tumor immune response following the death of cancer cells.Imaging Agent.
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EBI-031
License - Out-License Agreement with Roche
OnIn June 10, 2016, we entered into the Roche License Agreement, with Roche. The License Agreement became effective on August 16, 2016, following stockholder approval. Under the License Agreement,pursuant to which we granted Roche an exclusive, worldwide license, including the right to sublicense, to our patent rights and know-how related to our monoclonal antibody EBI-031 or any

and all other IL-6 anti-IL antagonist anti-IL-6 monoclonal antibody to make, have made, use, have used, register, have registered, sell, have sold, offer for sale, import and export any product containing such an antibody or any companion diagnostic used to predict or monitor response to treatment with such a product, or collectively, Licensedtechnology owned by us (collectively, the “Licensed Intellectual Property.
Pursuant toProperty”). Under the terms of theRoche License Agreement, Roche is required to continue developing, at its cost, EBI-031 and any other product made from the Licensed Intellectual Property that contains an IL-6 antagonist anti-IL-6anti-IL monoclonal antibody or(the “Roche Licensed Product,Product”) and pursue ongoing patent prosecution, at its cost. At the time of the Roche License Agreement, EBI-031, which was derived using our previous AMP-Rx platform, was in pre-clinical development as an intravitreal injection for diabetic macular edema and uveitis.
Financial Terms
We received from Roche paid an up-frontupfront license fee of $7.5 million in August 2016 upon the effectiveness of the license under theRoche License Agreement following approval by our stockholders, and Roche agreed to pay up to an additional $262.5 million upon the achievement of specified regulatory, development and commercial milestones with respect to up to two unrelated indications. Specifically, an aggregate amount of up to $197.5 million is payable to us for the achievement of specified milestones with respect to the first indication:indication, consisting of (i) $72.5 million in development milestones, the next of which is $30.0 million for initiation of the first Phase III study, (ii) $50.0 million in regulatory milestones and (iii) $75.0 million in commercialization milestones.
In September 2016, Roche paid us the first development milestone of $22.5 million as a result of the IND application for EBI-031 becoming effective. effective on or before September 15, 2016.
In December 2021, a $20 million milestone was achieved due to Roche initiating a Phase II clinical trial. We invoiced Roche $20 million with payment terms of 30 days following the achievement of the corresponding milestone event, pursuant to the Roche License Agreement. In January 2022 the payment of $20 million was received.
Additional amounts of up to $65.0 million are payable upon the achievement of specified development and regulatory milestones in a second indication.
In addition, we are entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% forof net sales of potential future products containing EBI-031 and up to 50% of these rates for net sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to the buy-out options of Roche further described below.Roche.
Buy-Out Options
The Roche License Agreement provides for two “option periods” during which Roche may elect to make a one-time payment to us and, in turn, terminate its diligence, milestone and royalty payment obligations under the Roche License Agreement. Specifically, (i) Roche may exercise a buy-out option following the first dosing or Initiation,("Initiation") in the first Phase 2 study for a Roche Licensed Product until the day before Initiation of the first Phase 3 study for a Roche Licensed Product, in which case Roche is required to pay us $135.0 million within 30 days after Roche’s exercise of such buy-out option and receipt of an invoice from us, or (ii) Roche may exercise a buy-out option following the day after Initiation of the first Phase 3 study for a Roche Licensed Product until the day before the acceptance for review by the FDA or other regulatory authority of a biologics license application, or BLA or similar application for marketing approval for a Roche Licensed Product in either the United States or in the E.U.EU, in which case Roche is required to pay us, within 30 days after Roche’s exercise of such buy-out option and receipt of an invoice from us, $265.0 million, which amount would be reduced to $220.0 million if none of our patent rights containing a composition of matter claim covering any compound or Roche Licensed Product has issued in the E.U.EU.
Termination
Either we or Roche may each terminate the Roche License Agreement if the other party breaches any of its material obligations under the Roche License Agreement and does not cure such breach within a specified cure period. Roche may terminate the Roche License Agreement following effectiveness by providing advance written notice to us or by providing written notice if we are debarred, disqualified, suspended, excluded, or otherwise declared ineligible from certain federal or state agencies or programs. We may terminate the Roche License Agreement if, prior to the first filing of a BLA for a Roche Licensed Product, there is a period of 12 months where Roche is not conducting sufficient development activities with respect to the products made from the Licensed Intellectual Property.
Clinical Development
In July 2019, Roche reported that it started a multi-center, non-randomized, open-label, multiple ascending dose Phase 1 study to investigate the safety, tolerability, pharmacokinetics and pharmacodynamics of intravitreal EBI-031 monotherapy in patients with diabetic macular edema. Further, Roche reported that once determined, an extended cohort will be dosed with the optimal dose of EBI-031 while another arm of the trial will test EBI-031 in combination with Lucentis (ranibizumab) following intravitreal administration in patients with diabetic macular edema.
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In December 2021, Roche reported that it started enrollment of two Phase 2 clinical trials in patients with diabetic macular edema (“DME”). The first clinical trial, BP43445 (NCT05151731), is a multicenter, randomized, double-masked, active comparator-controlled trial to investigate the efficacy, safety, tolerability, pharmacokinetics, and pharmacodynamics of EBI-031 administered intravitreally in patients with DME. The second clinical trial, BP43464 (NCT05151744), is a combination trial to assess the efficacy, safety, tolerability, pharmacokinetics, and pharmacodynamics of EBI-031 with ranibizumab (an anti-vascular endothelial growth factor inhibitor) compared with ranibizumab alone in DME patients. For both trials, only one eye will be chosen as the trial eye and the duration of the trial will be 52 weeks.
Our Intellectual propertyProperty
We currently own or exclusively license approximately 2313 families of patents and applications, which generally relate to our TPT-basedTFPT-based product candidates and evolving our platform of targeting agents, cytotoxins (such as deBouganin) and linker technologies. As our product candidates evolve through clinical development, we continue to monitor advancements and bolster patent coverage with the goal of attaining durable patent protection for at least 15 years from product launch. In addition, we have filed and are in the process of filing a number of additional applications around our platform technology, including our various targeting agents, cytotoxins, and linkers that, if issued, would expire in 2036.

where possible.
Product Candidates-Vicinium and ProxiniumCandidate - Vicineum
We exclusively license two families (48 patents and four applications) licensed fromunder a license agreement with the University of Zurich or Zurich,("Zurich") (the "Zurich License Agreement") which, among other things, include composition of matter claims directed to EpCAM antibody chimeras, EpCAM antibody chimera-cytotoxin conjugates, and their potential use in treating bladder and head and neck cancer. These families claim all or portions of Vicinium and Proxinium,Vicineum, as well as certainmethods of their respective indications under clinical development. The first family includes composition of matter claims directed to the EpCAM antibody chimeras that are used in Vicinium and Proxinium. The first family consists of 21 patents in the United States, Canada, Europe and Japan, which expire in April 2020, subject to any applicable patent term adjustment or extension that may be available on a jurisdictional basis. The second family includes claims directed to the use of Vicinium and Proxinium in the treatment oftreating bladder and head and neck cancer respectively, and consistsconsist of 27 issued patents in the United States, Europe, Canada, China, Israel and Japan and also include pending applications in the United States, Canada, Hong Kong and Europe.States. The expiry datedates of the patents in this family isare April 2024 subject to any applicable patent term adjustment or extension that may be available on a jurisdictional basis.
In addition to the Zurich portfolio, we own one issued U.S. patent with composition of matter claims directed to modified nucleic acid sequences that encode Vicinium and Proxinium and are potentially useful for high expression yield of Vicinium and Proxinium. The expiry date of this patent is in September 2028, subject to any applicable patent term adjustment or extension that may be available on a jurisdictional basis. In addition, we have filed and are in the process of filing a number of additional patent applications with claims around composition of matter, manufacturing and purification methods, medical applications, and various uses of our various product candidates that, if issued, would expire in 2036.
Bouganin and deBouganin family
We exclusively license a family of patents and applications licensed from Merck KGaA, or Merck, which include claims directed to, among other things, modified de-immunized bouganin protein, EpCAM antibody-bouganin conjugates, and use claims directed to, among other things, methods of using the same to treat various diseases, including cancer. Claims in this family may cover, among other things, both the immunoconjugate, VB6-845d, and the de-immunized bouganin cytotoxins used in our product candidates. Currently the family consists of three issued patents in the United States, as well as 30 issued patents in Australia, Canada, China, Europe, Hong Kong, India, Israel, Japan, South Korea, Mexico, New Zealand, Russia and South Africa and one pending application in each of the United States and Brazil. The expiry date of this family is in MarchJune 2025, subject to any applicable patent term adjustment or extension that may be available on a jurisdictional basis. We also exclusively license from Merck threeSee "Our Vicineum License Agreements" below for additional familiesinformation.
In addition to the Zurich portfolio, we own two issued US patents related to Vicineum. The expiry date of these patents and applications with, among other things, use claims directed to various de-immunization methodologies, which expire in May 2018, December 2018 andis February 2022,2029, subject to any applicable patent term adjustment or extension that may be available on a jurisdictional basis.
In addition, we have filed and are in the process of filing a number of additional patent applications with, among other things, composition of matter and use claims around our various product candidatesfamilies relating to treatment regimens using Vicineum that ifinclude issued would expire in 2036 and beyond.
We also exclusively license a family of patents directed to the unmodified bouganin cytotoxin from Protoden Technologies Inc., or Protoden, a company owned by Clairmark Investments Ltd., or Clairmark. See ‘‘See ‘‘Board Policies-Related Party Transactions’’ for additional details. The seven patents are in the United States, Australia and Japan and patent applications in Canada, and Europe and Hong Kong. These patents will expire in June 2018, subject2036.
Additionally, we have a license agreement with Micromet AG ("Micromet") (the "Micromet License Agreement"), now part of Amgen, Inc., which grants us non-exclusive rights, with certain sublicense rights, for know-how and patents allowing exploitation of certain single chain antibody products. These patents cover some key aspects of Vicineum. See "Our Vicineum License Agreements" below for additional information.
We also have a license agreement with XOMA Ireland Limited ("XOMA") (the "XOMA License Agreement") which grants us non-exclusive rights, with certain sublicense rights, to any applicablecertain XOMA patent term adjustment or extension that may be available on a jurisdictional basis. We do not currently view theserights and know-how related to certain expression technology, including plasmids, expression strains, plasmid maps and production systems. These patents and applications as significant to the development and commercialization, if approved,related know-how cover some key aspects of our product candidates.Vicineum. See "Our Vicineum License Agreements" below for additional information.
EBI-031 and our Legacy Product Candidates
AsWe own the following families of March 24, 2017, we owned a total of eleven families ofpatents and patent applications related to EBI-031 and our legacy product candidates, including EBI-005, or isunakinra.candidates. As of March 24, 2017,February 28, 2022, our patent portfolio includes the following patents and applications related to theseour legacy product candidates:
a United States, a New Zealand, Japan and a South Africa composition of matter patent covering isunakinra which expires in 2031;
composition-of-matter patent applications covering isunakinra in Australia, Brazil, Canada, China, Europe, Hong Kong, India, Israel, Korea, Mexico Russia, and Taiwan, which, if granted, are expected to expire in 2031;
patent applications covering the formulation of isunakinra filed in the United States, Australia, Canada, China, Europe, Japan, New Zealand, Russia, and Singapore, which, if granted, are expected to expire in 2034;
patent applications covering methods of manufacturing isunakinra filed in the Australia, which, if granted are expected to expire in 2032;

a PCT patent application covering methods and compositions for increasing the retention of therapeutic agents in the eye which, if granted, is expected to expire in 2035;
a provisional application directed to compositions and methods for increasing the retention of therapeutic agents in the eye which, if converted and granted, is expected to expire in 2037.2038.
a provisional application directed to compositions and methods for increasing the retention of anti-VEGF therapeutic agents in the eye which, if converted and granted, is expected to expire in 2037.2038; and
a provisional application directed to compositions and methods for increasing the retention of RGD therapeutic agents in the eye which, if converted and granted, is expected to expire in 2037.2038.
patent applicationsTo the best of our knowledge based on correspondence received on February 25, 2022, the following families are owned by us, and licensed to Roche pursuant to the Roche License Agreement dated June 10, 2016:
patents covering the IL-6 antagonistic anti-IL6 monoclonal antibodies and active fragments thereof, including IL-6 antibody EBI-029, filed in the United States, Australia, Brazil, Canada, China, Europe, Hong Kong, India, Israel, Japan, Korea, Mexico, New Zealand, Russia Singapore, and South Africa, which are licensed to Roche pursuant tothat expire in November 2033;
patent applications covering the License Agreement,IL-6 antagonistic anti-IL6 monoclonal antibodies and active fragments thereof, including IL-6 antibody EBI-029, filed in Brazil, Canada, Europe, India, Mexico, United States and Singapore, and, if granted, are expected to expire in 2033;
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patents covering IL-6 antagonistic anti-IL6 monoclonal antibodies and active fragments thereof, including the IL-6 antibody EBI-031, in Australia, Austria, Belgium, Bulgaria, Chile, China, Columbia, Croatia, Czech Republic, Denmark, Finland, France, Germany, Greece, Hong Kong, Hungary, Indonesia, Ireland, Italy, Japan, Lithuania, Macau, Malaysia, Mexico, Morocco, Netherlands, Norway, Poland, Portugal, Romania, Russia, Serbia, Slovenia, Slovakia, South Africa, Spain, Sweden, Switzerland, Turkey, Ukraine, United States and United Kingdom, that expire in November 2035;
patent applications covering IL-6 antagonistic anti-IL6 monoclonal antibodies and active fragments thereof, including the IL-6 antibody EBI-031, having a pending PCT application and applications pending or to be filed in Algeria, Australia, Bahrain, Brazil, Canada, Chile, Colombia, Costa Rica, Egypt, Europe, (to be filed),Egypt, India, Israel, Korea, Malaysia, Mexico, Morocco, New Zealand, Oman, Peru, Philippines, Qatar, Russian Federation, Saudi Arabia, Singapore, South Africa, Thailand, Ukraine, United Arab Emirates, United States and Vietnam, which are licensed to Roche pursuant to the License Agreement, and, if granted, are expected to expire in 2035; and
a PCT Applicationpatent applications in China, Europe, Japan and an Argentine applicationthe United States, each corresponding to a United States provisional application covering the IL-6 antibody EBI-031 formulation, which, are licensed to Roche pursuant to the License Agreement, and if granted, are expected to expire in 2036.2037.
Our Vicineum License Agreements
License agreementIn-License Agreement with The University of Zurich
Overview and exclusivity. Exclusivity
We have a license agreementLicense Agreement with the University of Zurich ("Zurich") which grants us exclusive license rights, with the right to sublicense, to make, have made, use and sell under certain patents primarily directed to our targeting agent, including an EpCAM chimera and related immunoconjugates and methods of use and manufacture of the same. These patents cover some key aspects of our product candidates Vicinium and Proxinium. Under the termsVicineum. Upon receipt of the agreement,CRL regarding our BLA for Vicineum for the treatment of BCG-unresponsive NMIBC, we may bebecame obligated to pay $750,000$0.5 million in a milestone payments, for the first product candidate that achieves applicable clinical development milestones. Based on current clinical status, we anticipate that these milestones may be triggered by Vicinium’s clinical development pathway. As part of the consideration, we willpayment to Zurich. We are also be obligated to pay up to a 4% royalty on the net product sales for products covered by or manufactured using a method covered by a valid claim in the Zurich patent rights. We haveRoyalties owed to Zurich will be reduced if the righttotal royalty rate owed by us to reduceZurich and any other third party is 10% or greater, provided that the royalty rate to Zurich may not be less than 2% of net sales. The obligation to pay royalties in a particular country expires upon the expiration or termination of the last of the Zurich patent rights that covers the manufacture, use or sale of a product. There is no obligation to pay royalties in a country if there is no valid claim that covers the product or a method of manufacturing the product. AsFor the year ended December 31, 2020, we recorded an expense of $0.3 million for the achievement of the datedevelopment milestone related to the submission of this Annual Report on Form 10-K, aggregate license feesour BLA for Vicineum with the FDA. For the year ended December 31, 2021, we recorded an expense of $250,000 have been paid$0.5 million for the regulatory milestone related to Zurich by Viventia prior to our acquisitionreceipt of Viventia.the CRL from the FDA in August 2021.
Patent rights. Rights
We are responsible for the patent filing, prosecution and maintenance activities pertaining to the patent rights, at our sole expense, while Zurich is afforded reasonable opportunities to review and comment on such activities. If appropriate, we shall apply for an extension of the term of any licensed patent where available, for example, in at least the United States, Europe and Japan. In the event of any substantial infringement of the patent rights, we may request Zurich to take action to enforce the licensed patents against third parties. If the infringing activity is not abated within 90 days and Zurich has elected not to take legal action, we may take legal action (inbring suit in our own name (and in Zurich’s name, if necessary). Such action will be at our own expense and Zurich will have the opportunity to join at its own expense. Recoveries from any action shall generally belong to the party bringing the suit, but (a) in the event that we bring the action and an acceptable settlement or monetary damages are awarded, then Zurich will be reimbursed for any amount that would have been due to Zurich if the products sold by the infringer actually had been sold by us, or (b) in the event a joint legal action is brought, then the parties shall share the expense and recoveries shall be shared in proportion to the share of expense paid by the respective party. Each party is required to cooperate with the other in litigation proceedings at the expense of the party bringing the action.
Term and termination. Termination
The term of the agreementZurich License Agreement expires as of the expiration date of the last patent to expire within the Zurich patent rights. We are currently projecting an expiration date for the U.S.United States licensed patents in 2024,June 2025, subject to any applicable patent term adjustment or extension that may be available on a jurisdictional basis. Zurich has the right to terminate the agreementZurich License Agreement if we breach any obligation of the agreement and fail to cure such breach within the applicable cure periods. We have the right to terminate the agreementZurich License Agreement at any time and for any reason by giving 90 days written notice to Zurich.
In-License Agreement with Micromet
Overview
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We have a License Agreement with Merck KGaA

OverviewMicromet AG ("Micromet"), now part of Amgen, Inc., which grants us nonexclusive rights, with certain sublicense rights, for know-how and exclusivity. In March 2004, we entered into an exclusive license agreement with Biovation Limited, subsequently acquired by Merck, which was subsequently amended and restated in October 2015. Pursuant topatents allowing exploitation of certain single chain antibody products. These patents cover some key aspects of Vicineum. Under the agreement, we were granted an exclusive license, with the right to sublicense, under certain patents and technology relating to the de-immunization of our cytotoxin Bouganin for therapeutic and in vivo diagnostic purposes in humans. The de-immunized cytotoxin is known as deBouganin, and has been incorporated into our product candidates, VB6-845d. We have the worldwide exclusive right, with the right to sublicense, under the licensed patents and technology to, among other things, make, have made, use or sell products incorporating deBouganin.
Asterms of the dateLicense Agreement with Micromet, as of this Annual Report on Form 10-K, aggregate license fees of $225,000 have been paid to Merck by Viventia prior to our acquisition of Viventia. Under the agreement,December 31, 2021, we may be obligated to pay certain clinical development and regulatory milestonesup to €2.4 million in milestone payments for each ‘‘licensed product’’: (A) $2,000,000 upon the start of the first Phase 3 clinical trial for a licensed product; (B) $2,000,000 upon submission of the first BLA for a licensed product; (C) $2,000,000 upon the approval of the first BLAproduct candidate that achieves applicable regulatory and sales-based development milestones (approximately $2.7 million at exchange rates in certain countries for a licensed product and $1,000,000 upon each of the second and third approvals of a BLA in certain additional countries for the same licensed product (total of $4,000,000); and (D) $2,000,000 upon the approval of the second BLA in certain countries for a licensed product; and $1,000,000 upon each of the second and third approvals of the second BLA in certain additional countries for the same licensed product (total of $4,000,000)effect on December 31, 2021). As part of the consideration, weWe are obligatedalso required to pay up to a 1.5%3.5% royalty on the net sales for products covered by the agreement, which includes Vicineum. The royalty rate owed to Micromet in a particular country will be reduced to 1.5% if there are no valid claims covering the product sales up to $150,000,000 and a 2% royalty on the net product sales above such amount.
Patent rights. We have the first right to file, prosecute and maintain licensed patents relating to de-immunized plasmids and proteins, including, among other things, our deBouganin and Merck has the first right to file, prosecute and maintain any other licensed patents. We have the first right, but not thein that country. The obligation to enforcepay royalties in a particular country expires upon the licensed patents against third parties for suspected infringement, and, after repaymentlater of costs and expenses, any recoveries under such suit will be treated as net product sales and we shall pay a royalty on the same. We may not settle such patent infringement suit without the prior written consent of Merck, but such consent shall not be unreasonably delayed or withheld. If we decline to enforce the licensed patents against third parties for suspected infringement, Merck may bring such a patent infringement suit and any recoveries will be retained by Merck.
Term and termination. The agreement expires on a country-by-country and product-by-product basis until the longer of (i) the expiration date of the last to expire patent withinvalid claim covering the licensed patent rights that covers a licensed product and (ii) 10 years fromthe tenth anniversary of the first commercial sale of a licensedthe product in such country; provided that nocountry. Finally, we are required to pay to Micromet an annual license maintenance fee of €50,000 (approximately $56,625 at exchange rates in effect as of December 31, 2021), which can be credited towards any royalty is payablepayment we owe to Micromet. We recorded an expense of €0.7 million ($0.9 million) related to achievement of a development milestone in the three months ended December 31, 2020, due to the submission of our BLA for more than 15 years fromVicineum with the FDA in December 2020. We recorded an expense of €0.5 million ($0.6 million) related to the submission of the MAA to the EMA for Vysyneum™ in the first commercial launchquarter of a licensed product anywhere in2021.
Patent Rights
Micromet, at its sole expense, is responsible for the world.patent filing, prosecution and maintenance activities pertaining to the patent rights. In any patent enforcement action initiated by Micromet, we may be required, upon the request of Micromet and at Micromet’s expense, to provide reasonable assistance to Micromet with respect to such enforcement action.
Term and Termination
The term of the Micromet License Agreement expires as of the expiration of any royalty obligations under the License Agreement. Either party has the right to terminate the agreement for breach of the agreement andMicromet License Agreement if the other party fails to comply with any of its material obligations under the Micromet License Agreement and fails to cure such breachnon-compliance within the applicable cure period.periods.
In-License Agreement with XOMA
Overview
We have a License Agreement with XOMA Ireland Limited ("XOMA") which grants us non-exclusive rights to certain XOMA patent rights and know-how related to certain expression technology, including plasmids, expression strains, plasmid maps and production systems. These patents and related know-how cover some key aspects of Vicineum. Under the terms of the License Agreement with XOMA, we are required to pay up to $0.25 million in milestone payments for a product candidate that incorporates know-how under the license and achieves applicable clinical development milestones. Based on current clinical status, we anticipate that these milestones may be triggered by Vicineum’s clinical development pathway. We are also required to pay a 2.5% royalty on the net sales for products incorporating XOMA’s technology, which includes Vicineum. We have the right to reduce the amount of royalties owed to XOMA on a country-by-country basis by the amount of royalties paid to other third parties, provided that the royalty rate to XOMA may not be less than 1.75% of net sales. In addition, the foregoing royalty rates are reduced by 50% with respect to products that are not covered by a valid patent claim in the country of sale. The obligation to pay royalties in a particular country expires upon the later of the expiration date of the last valid claim covering the product and the tenth anniversary of the first commercial sale of the product in such country.
Patent Rights
XOMA, at its sole expense, is responsible for the patent filing, prosecution and maintenance activities pertaining to the patent rights. In any patent enforcement action initiated by XOMA, we may be required, upon the request of XOMA and at XOMA’s expense, to provide reasonable assistance to XOMA with respect to such enforcement action.
Term and Termination
The term of the XOMA License Agreement expires as of the expiration of any royalty obligations under the XOMA License Agreement. Either party has the right to terminate the agreement by giving Merck six months prior written notice.XOMA License Agreement if the other party fails to comply with any of its material obligations under the XOMA License Agreement and fails to cure such non-compliance within the applicable cure periods.
Our Manufacturing
We maintain an approximately 31,400lease a 31,100 square foot manufacturing, laboratory, warehouse and office facility in Winnipeg, Manitoba, Canada.Manitoba. We have three 15 liter fermentors,15-liter fermenters, one 150 liter fermentor,30-liter fermenter, one 500 liter fermentor150-liter fermenter, one 500-liter fermenter and one 1,500 liter fermentor.1,500-liter fermenter. Our classified fermentation suite and post-production processing capabilities are currentlywere dedicated to producing our pre-clinical study and clinical trial batches of Vicineum. In September 2017, we completed the manufacturing of all Vicineum necessary for our Phase
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3 VISTA Trial and for our CRADA with the NCI. In conjunction with this achievement, we ended our manufacturing activities at our facility in Winnipeg and completed the technology transfer processto outsource future Vicineum clinical and commercial to third-party manufacturers.
Fujifilm and Baxter
In October 2018, we entered into a Master Bioprocessing Services Agreement with Fujifilm (the “Fujifilm MSA”) for the manufacturing process and technology transfer of Vicineum drug substance production.
In November 2019, we entered into a Commercial Manufacturing and Supply Agreement with Baxter (the “Baxter CSA”) for the manufacturing process and technology transfer of Vicineum drug product production.
In August 2020, we completed manufacturing of the drug substance process performance qualification (“PPQ”) batches at Fujifilm and in September 2020, we successfully completed the drug product PPQ batches at Baxter. All of the completed drug substance PPQ batches and drug product PPQ batches met all quality acceptance criteria.
In December 2020, we received and analyzed all of the analytical comparability test results from the drug substance and drug product PPQ batches. Our in-house expertise and capabilities in process development and manufacturing allow us to reduce product development timelines by manufacturing Fabs, scFvs, protein scaffolds and fusion proteins such as TPTs for research and pre-clinicalFor analytical comparability, we conducted testing across four categories: release testing, biophysical characterization, forced degradation studies, and stability studies. This approach is in alignment with requirements of the FDA, the EMA and the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use. The test results for Vicineum produced by Fujifilm and Baxter were found to be highly comparable to our supply of Vicineum produced at our Winnipeg facility.
On October 29, 2021, at the CMC Type A Meeting, the FDA confirmed that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical testingtrials and subsequently transferring production into our fermentation suite. In addition, our one-step manufacturing process creates a homogeneous productconfirmed that we believecan utilize Vicineum manufactured during process validation for any future clinical trials needed to address issues raised in the CRL regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC, and that any of these future trials can proceed while addressing CMC issues raised in the CRL.
In January 2022, we signed a Scope of Work ("SOW #11") with Fujifilm under the Fujifilm MSA for the manufacturing of commercial batches of Vicineum in 2022 and 2023.
We intend to use Vicineum produced by Fujifilm and Baxter for any future clinical trials of Vicineum, including the additional Phase 3 clinical trial, and, if approved, for commercial supply.
Qilu
In June 2021, we entered into a Global Supply Agreement with Qilu pursuant to which Qilu will improve efficacy. These particular advantages also reduce costs compared to contracting third party process developmentbe part of the manufacturing network for, if approved, global commercial supply of Vicineum drug substance and manufacturing.drug product.
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Our manufacturing facility is intended to produce multiple product candidates per year and we believe it will produce sufficient quantities of our product candidates to meet our currently anticipated pre-clinical study and clinical trial needs. In the event we obtain approval from the FDA to market any of our product candidates, we will need to outsource our commercial scale manufacturing to contract manufacturing organizations, or CMOs. We are currently in process of identifying a CMO.
Commercial Operations
We do not currently have an organization structured for the sales, marketing and distribution of products. We may rely on licensing and co-promotion agreements with strategic collaborators for the commercialization of our products in the United States and other territories. If we choose to build a commercial infrastructure to support marketing in the United States, such commercial infrastructure could be expected to include a sales force supported by sales management, internal sales support, an internal marketing group and distribution support. To develop the appropriate commercial infrastructure internally, we would

have to invest financial and management resources, some of which would have to be deployed prior to the approval of any of our product candidates.
Competition
The pharmaceutical industry is highly competitive, subject to rapid and significant technological change and has a strong emphasis on developing proprietary products. While we believe that our next generation TPTTFPT platform, knowledge, experience and scientific resources provide us with competitive advantages, we face competition from both large and small pharmaceutical and biotechnology companies, academic institutions and other research organizations; specifically with companies, institutions and organizations that are actively researching and developing products that attach proprietary cell-killing payloads to antibodies for targeted delivery to cancer cells. Our competitors include, but are not limited to,to:
NMIBC: Merck & Co., Inc. (Keytruda/pembrolizumab and BCG) (approved drugs), Endo Pharmaceuticals Inc. (Valstar/valrubicin) (approved drug), FerGene Inc. (Adstiladrin/nadofaragene firadenovec (rAd-IFN/Syn3)), Medical Enterprises Ltd. (Synergo RITE plus mitomycin C), Aadi, LLC (ABI-009), Altor Bioscience Corporation (ALT-801)ImmunityBio (Anktiva/N-803 in combination with BCG), Cold Genesys, Inc.CG Oncology. (CG0070), Endo PharmaceuticalsTheralase Technologies Inc. (Valstar) (approved drug)(TLD-1433 photodynamic compound), FKD Therapies Oy (Instilidrin)Bristol-Myers Squibb (Opdivo/nivolumab with or without BCG or BMS-986205), Merck and other pharmaceutical companies (BCG) (approved drug)F. Hoffmann-La Roche AG (Tecentriq/Atezolizumab), AstraZeneca (Imfinzi/durvalumab with or without BCG or External Beam Radiotherapy), Eli Lilly and Company (Gemcitabine) and Telormedix SA (Vesimune); Pfizer, Inc. (Sasanlimab);
SCCHN: Bristol-Myers Squibb Company (nivolumab)(approved(Opdivo/nivolumab) (approved drug), Eli Lilly and Company, and Merck (Erbitux, pembrolizumab) (approved drugs);
Multiple types of solid tumors: Amgen Inc. (Panitumumab) (approved drug), Bayer AG and Onyx Pharmaceuticals (Sorafenib) (approved drug), Bristol-Myers Squibb Company, Eli Lilly and Company, and Merck (Erbitux) (approved drug), F. Hoffmann-La Roche AG (Bevacizumab) (approved drug), Genentech, Inc. (Bevacizumab, Erlotinib and Trastuzumab) (approved drugs), Pfizer, Inc. (Sunitinib) and Trion Research GmbH (Removab); and
In addition to competition from alternative treatments, we may also face competition from products that are biosimilar to, and possibly interchangeable with, our product candidates. Biosimilar products are expected to become available over the coming years. Even if our product candidates achieve marketing approval, they may be priced at a significant premium over competitive biosimilar products if any have been approved by then and insurers or other third partythird-party payors may encourage or even require the use of lower priced biosimilar products. Even if our treatments receive market authorization, they may not be listed on the formularies of payors (public or private insurers) or reimbursed. This may impact the uptake of the drug as a treatment option for patients and/or the price at which the drug can be sold at. Further, if the drug is reimbursed it may be at a narrower indication than the full scope of market authorization.
Many of our competitors have significantly greater financial resources and expertise in research and development, manufacturing, pre-clinical studies, conducting clinical trials, obtaining regulatory approval and marketing than we do. These competitors are also active in seeking patent protection and licensing arrangements in anticipation of collecting royalties for use of technology that they have developed. Moreover, specialized biologics, biopharmaceutical and biotechnology companies may prove to be significant competitors, particularly through collaborative arrangements with large and established companies.
Our commercial opportunity could be substantially limited in the event that our competitors develop and commercialize products that are more effective, safer, less toxic, more convenient or cheaper than our comparable products. In geographies that are critical to our commercial success, competitors may also obtain regulatory approvals before us, resulting in our competitors building a strong market position in advance of our product’s entry. We believe the factors determining the success of our programs will be the drug design, effectiveness against multi-drug resistance mechanisms, efficacy, safety, price and convenience of our product candidates.
Government Regulation
As a clinical-stage biologics company, we are subject to extensive regulation by the FDA, Health Canada and other national, supranational, state, provincial and local regulatory agencies. We are also subject to extensive regulation by similar governmental authorities in other countries in which we operate. In the United States, the Federal Food, Drug, and Cosmetic Act or the FDCA,("FDCA") and the Public Health Service Act or PHSA,("PHSA") and their implementing regulations set forth, among other things, requirements for the research, testing, development, manufacture, quality control, safety, effectiveness, approval, post-approval monitoring and reporting, labeling, storage, record keeping, distribution, import, export, advertising and promotion of our product candidates. Although the discussion below focuses on regulation in the United States, we anticipate seeking approval to market our products in other countries. Generally, our activities in other countries will be subject to regulation that is similar in nature and scope to that imposed in the United States, although there can be important differences. Additionally, some significant aspects of regulation in the E.U.EU are addressed in a centralized way through the European Commission following the opinion of the EMA, but country-specific regulation in the individual European Union Member States or the E.U.("EU Member States,States") remains essential in many respects. The process of obtaining regulatory marketing approvals and the

subsequent compliance with
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appropriate supranational, federal, state, provincial, local and foreignnon-US statutes and regulations require the expenditure of substantial time and financial resources, and we may not be successful in any given jurisdiction.
U.S.US Government Regulation
In the United States, pharmaceuticaldrug products are regulated by the FDA under the FDCA and other laws, including, in the case of biologics, the PHSA. PharmaceuticalDrug products are also subject to other federal, state and local statutes and regulations. A failure to comply with any applicable requirements during the product development, approval, or post-approval periods may lead to administrative or judicial sanctions, including, among other things, the imposition by the FDA or an institutional review board or IRB,("IRB") of a hold on clinical trials, refusal to approve pending marketing applications or supplements, withdrawal of approval, warning letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, or administrative, civil and/or criminal investigation, penalties or prosecution.
In the United States, all of our product candidates are regulated by the FDA as biologics. Biologics require the submission of a BLA and approval by the FDA prior to being marketed in the United States. Manufacturers of biologics may also be subject to state and local regulation.
The steps required before a biologic may be marketed in the United States generally include:
completion of pre-clinical studies, animal studies and formulation studies, some in compliance with the FDA’s current Good Laboratory Practices or GLP,("GLP") regulations, and the Animal Welfare Act administered and enforced by the U.S.United States Department of Agriculture;
submission to the FDA of an IND to support human clinical testing, which must become effective before human clinical trials may commence;
approval by an IRB before each trial may be initiated at each clinical site;
performance of adequate and well-controlled clinical trials under protocols submitted to the FDA for review and approvalreviewed and approved by each IRB, conducted in accordance with federal regulations and with current Good Clinical Practices or GCPs,("GCP") to establish the safety, purity and potency of the biologic for each targeted indication;
submission of a BLA to the FDA;
satisfactory completion of an FDA Advisory Committee review, if applicable;
satisfactory completion of an FDA inspection of the manufacturing facilities at which the biologic is produced to assess compliance with current Good Manufacturing Practices, or cGMP and to assure that the facilities, methods and controls are adequate; and
FDA review and approval of thea BLA.
Pre-clinical studiesStudies
Pre-clinical studies include laboratory evaluation of product chemistry, formulation and toxicity, as well as animal studies to assess the characteristics and potential safety and efficacy of the product candidate. The conduct of the pre-clinical testsstudies must comply with federal regulations and requirements, including, as applicable, GLP and the Animal Welfare Act. The results of the pre-clinical studies, together with manufacturing information and analytical data, are submitted to the FDA as part of an IND. The FDA evaluates the IND to determine whether there is an adequate basis for starting the drugproduct candidate in initial clinical studies,trials, and the IND must become effective before human clinical trials may be commenced. Additional pre-clinical testsstudies may continue after the IND is submitted. A 30-day waiting period after the submission of each IND is required prior to the commencement of clinical testing in humans. If during this 30-day period the FDA does not raise any concerns or issues that must be addressed prior to the commencement of clinical trials or does not impose a clinical hold, the IND becomes effective 30 days following the FDA’s receipt of the IND and the clinical trial proposed in the IND may begin.
Clinical trialsTrials
Clinical trials involve the administration of the product candidate to healthy volunteers or patients under the supervision of qualified investigators. Clinical trials are subject to extensive regulation and must be conducted in compliance with (i) federal regulations, (ii) GCP standards, which set safeguards to protect the rights and health of patients and establish standards for conducting, recording data from, and reporting results of clinical trials, and (iii) protocols detailing the objectives of the trial, the parameters to be used in monitoring safety, and the effectiveness criteria to be evaluated, if any. ForeignNon-US studies conducted under an IND generally must meet the same requirements that apply to studies being conducted in the United States.

The informed written consent of each study subjectpatient must be obtained before the subjectpatient may begin participation in the clinical trial. The study protocol, study plan, and informed consent forms for each clinical trial must be reviewed and approved by an IRB for each clinical site, and the study must be conducted under the auspices of an IRB for each trial site. Investigators and IRBs must also comply with FDA regulations and guidelines, including those regarding oversight of study subjectpatient informed consent, complying with the study protocol and investigational plan, adequately monitoring the clinical trial, and timely reporting of adverse events.
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The clinical trial program for a product candidate is generally divided into three phases. Although the phases are usually conducted sequentially, they may overlap or be combined. The three phases are as follows:
Phase 1. Phase 1 involves the initial introduction of a product candidate into humans. Phase 1 clinical trials are typically conducted in healthy human subjects, but in some situations are conducted in subjectspatients with the target disease or condition. These clinical trials are generally designed to evaluate the safety, metabolism, PKpharmacokinetic ("PK") properties and pharmacologic actions of the product candidate in humans, the side effects associated with increasing doses and, if possible, to gain early evidence onof effectiveness. During Phase 1 clinical trials, sufficient information about the product candidate’s PK properties and pharmacological effects may be obtained to inform and support the design of Phase 2 clinical trials. The total number of participants included in Phase 1 clinical trials varies, but is generally in the range of 20 to 80;
Phase 2. Phase 2 includes the controlled clinical trials conducted to obtain initial evidence of effectiveness of the product candidate for a particular indication(s) in subjectspatients with the target disease or condition, to determine dosage tolerance and optimal dosage, and to gather additional information on possible adverse side effects and safety risks associated with the product candidate. Phase 2 clinical trials are typically well-controlled, closely monitored, and conducted in a limited subjectpatient population, usually involving no more than several hundred participants; and
Phase 3. Phase 3 clinical trials are controlled clinical trials conducted in an expanded subjectpatient population at geographically dispersed clinical trial sites. They are performed after preliminary evidence suggesting effectiveness of the product candidate has been obtained and are intended to further evaluate dosage, clinical effectiveness and safety, to establish the overall benefit-risk relationship of the product candidate and to provide an adequate basis for regulatory approval. Phase 3 clinical trials usually involve several hundred to several thousand participants. In most cases, the FDA requires two adequate and well controlled Phase 3 clinical trials to demonstrate the efficacy of the product candidate, although a single Phase 3 clinical trial with other confirmatory evidence may be sufficient in certain instances.
The decision to suspend or terminate development of a product candidate may be made by either a health authority body, such as the FDA, by an IRB, or by a company for various reasons and during any phase of clinical trials. The FDA may order the temporary or permanent discontinuation of a clinical trial at any time or impose other sanctions if it believes that the clinical trial either is not being conducted in accordance with FDA requirements or presents an unacceptable risk to the clinical trial subjects.patients. In some cases, clinical trials are overseen by a DSMB,data safety monitoring board ("DSMB"), which is an independent group of qualified experts organized by the trial sponsor to evaluate at designated points in time whether or not a trial may move forward and/or should be modified. These decisions are based on unblinded access to data from the ongoing trial and generally involve determinations regarding the benefit/riskbenefit-risk ratio for study subjectspatients and the scientific integrity and validity of the clinical trial.
In addition, there are requirements for the registration of certain clinical trials of product candidates on public registries, such as ClinicalTrials.gov,www.clinicaltrials.gov, and the submission of certain information pertaining to these trials, including clinical trial results, after trial completion.
Assuming successful completion of all required testing in accordance with all applicable regulatory requirements, a sponsor submits extensive information about the product candidate information to the FDA in the form of a BLA to request marketing approval for the product candidate in specified indications.
Biologics License Applications
In order to obtain approval to market a biologic in the United States, a marketing application must be submitted to the FDA that provides data establishing the safety and effectiveness of the product candidate for the proposed indication. The application includes all relevant data available from pertinent pre-clinical studies and clinical trials, including negative or ambiguous results as well as positive findings, together with detailed information relating to the product’s chemistry, manufacturing, controls and proposed labeling, among other things. Data can come from company-sponsored clinical trials intended to test the safety and effectiveness of a product candidate, or from a number of alternative sources, including studies initiated by investigators. To support marketing approval, the data submitted must be sufficient in quality and quantity to establish the safety and effectiveness of the product candidate to the satisfaction of the FDA. For example, in November 2016,

the FDA issued a draft guidance document on developing new drugs and biologics for treating BCG-unresponsive NMIBC and our BLA for Vicinium will likely have to meet the expectations set forthfinalized this guidance in that guidance document.February 2018.
Under the Prescription Drug User Fee Act, or PDUFA, as amended, the fees payable to the FDA for reviewing aan original BLA, as well as annual program fees for commercial manufacturing establishments and for approved products, can be substantial, subject to certain limited deferrals, waivers and reductions that may be available. The FDA has 60 days from receipt of a BLA to determine whether the application will be accepted for filing based on the agency’s threshold determination that it is sufficiently complete to permit substantive review. The FDA may refuse to accept for filing any BLA that it deems incomplete or not properly reviewable at the time of submission, in which case the BLA will have to be updated and resubmitted. The FDA’s PDUFA review goal is to review 90% of priority BLA applications and original efficacy supplements within
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six months of filing and 90% of standard applications and original efficacy supplements within 10 months of filing, whereupon a decision is to be made, but the FDA can and frequently does extend this review timeline to consider certain later-submitted information or information intended to clarify or supplement information provided in the initial submission.
The FDA may not complete its review or approve a BLA within these established goal review times. The FDA reviews the BLA to determine, among other things, whether the proposed product is safe, pure, and potent for its intended use, and whether the product is being manufactured in compliance with cGMP. The FDA may also refer applications for novel product candidates which present difficult questions of safety or efficacy to an advisory committee, typically a panel that includes clinicians and other experts, for review, evaluation and a recommendation as to whether the application should be approved and under what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when making decisions.
Before approving a BLA, the FDA will inspect the facilities at which the product candidate is manufactured or the facilities that are significantly involved in the product development and distribution process and will not approve the product candidate unless cGMP compliance is satisfactory. Additionally, before approving a BLA, the FDA will typically inspect one or more clinical sites to assure compliance with GCP. Under the Pediatric Research Equity Act, certain BLAs must include an assessment, generally based on clinical trial data, of the safety and effectiveness of the biological product in relevant pediatric populations. The FDA may waive or defer the requirement for a pediatric assessment, either at a company’s request or by its own initiative, including waivers for certain products not likely to be used in a substantial number of pediatric patients. Products with orphan drug designation are exempt from these requirements for orphan-designated indications with no formal waiver process required.
After the FDA evaluates the BLA and the manufacturing facilities, it issues either an approval letter or a complete response letter.CRL. A complete response letterCRL generally outlines the deficiencies in the submission and may require substantial additional testing or information in order for the FDA to reconsider the application. On August 13, 2021, we received a CRL from the FDA indicating that the FDA had determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality. If and when those deficiencies have been addressed to the FDA’s satisfaction in a resubmission of thea BLA, the FDA may issue an approval letter. The FDA’s PDUFA review goal is to review such resubmissions iswithin two or six months of receipt, depending on the type of information included. Notwithstanding the submission of any requested additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval and deny approval of a resubmitted BLA. FDA approval of any application may include many delays or never be granted. An approval letter authorizes commercial marketing of the product candidate with specific prescribing information for specific indications. As a condition of BLA approval, the FDA may require a risk evaluation and mitigation strategy or REMS,("REMS") to help ensure that the benefits of the product candidate outweigh the potential risks. REMS can include Medication Guides, communication plans for healthcare professionals, and also may include elements to assure safe use or ETASU.("ETASU"). ETASU can include, but are not limited to, special training or certification for prescribing or dispensing, dispensing only under certain circumstances, special monitoring, and the use of patient registries. The requirement for a REMS can materially affect the potential market and profitability of the biologic. Moreover, product approval may require substantial post-approval testing and surveillance to monitor the biologic’s safety, purity, or potency, which can be costly.
Changes to some of the conditions established in an approved application, including changes in indications, labeling, or manufacturing processes or facilities, require submission and FDA approval of a new BLA or a supplemental BLA before the change can be implemented. A supplemental BLA for a new indication typically requires clinical data similar to that in the original application, and the FDA generally uses the same procedures and actions in reviewing a supplemental BLA as it does in reviewing a new BLA.
Product approvals may be withdrawn if compliance with regulatory standards is not maintained or if safety or manufacturing problems occur following initial marketing. For example, quality control and manufacturing procedures must conform, on an ongoing basis, to cGMP requirements, and the FDA periodically inspects manufacturing facilities to assess compliance with cGMP. Accordingly, manufacturers must continue to spend time, money and effort to maintain cGMP compliance. In addition, new or modified government requirements, including from new legislation, may be established that

could delay or prevent regulatory approval of our product candidates under development or affect our ability to maintain product approvals we have obtained.
FDA regulation of companion diagnostics
If safe and effective use of a product candidate depends on identifying appropriate patients through an in vitro diagnostic test, then the FDA generally will require approval of a diagnostic test, known as an in vitro companion diagnostic device, or companion diagnostic, at the same time that the FDA approves the product candidate. The FDA issued an August 2014 guidance document addressing companion diagnostics. The FDA has required sponsors using companion diagnostics intended to select the patients who will respond to cancer treatment to obtain a pre-market approval, or PMA, for those diagnostics. The review of these companion diagnostics in conjunction with the review of a cancer therapeutic involves coordination of review by the FDA’s Center for Biologics Evaluation and Research and by the FDA’s Center for Devices and Radiological Health. During a Type C meeting with FDA in 2007, the FDA noted that approval of a companion diagnostic for EpCAM expression would need to coincide with Proxinium approval. We intend to clarify whether the FDA still believes that a companion diagnostic is necessary for approval of Proxinium.
PMA applications involve a rigorous premarket development program during which the applicant must generate and provide the FDA with extensive data, including from pre-clinical and clinical studies, supporting the device’s safety and effectiveness and information about the device and its components regarding, among other things, device design, manufacturing and labeling. PMA applications are subject to an application fee. For a diagnostic device, the applicant must demonstrate that the diagnostic produces reproducible results when the same sample is tested multiple times by multiple users at multiple laboratories. As part of the PMA review, the FDA will typically inspect the manufacturer’s facilities for compliance with the Quality System Regulation, or QSR, which imposes design, testing, control, documentation and other quality assurance requirements.
PMA approval is not guaranteed, and the FDA may ultimately respond to a PMA submission with a denial of approval or a “not approvable” letter based on deficiencies in the application and require additional clinical trial or other data that may be expensive and time-consuming to generate and that can substantially delay approval. If the FDA’s evaluation of the PMA application is favorable, the FDA may issue an approvable letter requiring the applicant’s agreement to specific conditions, such as changes in labeling, or specific additional information, such as submission of final labeling, in order to secure final approval of the PMA. If the FDA concludes that the applicable criteria have been met, the FDA will issue an approval letter for the approved indications, which may be more limited than those originally sought by the applicant. The PMA can include post-approval conditions that the FDA believes necessary to ensure the safety and effectiveness of the device, including, among other things, restrictions on labeling, promotion, sale and distribution. Medical devices remain subject to extensive regulatory requirements after being approved or cleared, including under the QSR.
Biosimilars and market exclusivityMarket Exclusivity
TheUnder the Biologics Price Competition and Innovation Act of 2009 or BPCIA, was passed as part of the Patient Protection and Affordable Care Act and the Health Care and Education Affordable Reconciliation Act of 2010, or the Affordable Care Act, that President Obama signed into law in March 2010. This U.S. healthcare legislation created an approval pathway for biosimilar versions of innovative biological products that did not previously exist. Prior to that time, innovative biologics had essentially unlimited regulatory exclusivity. Under the biosimilars pathway,("BPCIA"), the FDA can approve products that are biosimilar to (but not generic copies of) innovative biologics on the basis of less extensive data than is required by a full BLA. To be biosimilar, a biological product must be highly similar to an already-licensed FDA biological product, or reference product and can have no clinically meaningful differences in safety, or efficacypurity and potency from the reference product. An interchangeable biosimilar product must meet additional standards for interchangeability and, if approved, may be substituted
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for the reference product. At this juncture, it is unclear whether any product biosimilar deemed ‘‘interchangeable’’ by the FDA, in fact, will be readily substituted by pharmacies, which are governed by state pharmacy law.
After an innovator has marketed its product for four years, a manufacturer may file an application for approval of a ‘‘biosimilar’’ version of the innovator product. However, although an application for approval of a biosimilar may be filed four years after approval of the innovator product, qualified innovative biological products receive 12 years of regulatory exclusivity, meaning that the FDA may not approve a biosimilar version until 12 years after the innovative biological product was first approved by the FDA under the PHSA. The BPCIA also provides a mechanism for innovators to enforce the patents that protect innovative biological products and for biosimilar applicants to challenge the patents. Such patent litigation may begin as early as four years after the innovative biological product is first approved by the FDA. Although the patents for the reference biologic may be challenged by the biosimilar applicant during that time period pursuant to the BPCIA statutory patent

challenge framework, no biosimilar or interchangeable product will be licensed by the FDA until the end of the exclusivity period. The first biologic product candidate submitted under the abbreviated approval pathway that is determined to be interchangeable with the reference product has exclusivity against any other determinations of interchangeability to the reference product for the lesser of (i) one year after first commercial marketing of the interchangeable biosimilar product, (ii) 18 months after approval of the interchangeable biosimilar product if there is no legal challenge, (iii) 18 months after the resolution in the interchangeable biosimilar product applicant’s favor of a lawsuit challenging the reference product’s patents, and (iv) 42 months after 42 months after approval of the interchangeable biosimilar product if a lawsuit is ongoing within the 42-month period.
The objectives of the BPCIA are conceptually similar to those of the Hatch-Waxman Act, which established abbreviated pathways for the approval of generic drugs. The FDA has published several guidance documents providing direction on developing and obtaining approval of biosimilar product candidates. The guidance documents to date explain, among other things, that the FDA will approve a biosimilar product if there are no clinically meaningful differences between the biological product and the reference product in terms of safety, purity and potency. A determination of biosimilarity may be based upon: (1) analytical studies showing that the biological product is highly similar to, with no clinically meaningful differences from, the reference product, (2) animal studies, including toxicity assessments, and/or (3) a clinical trial or trials (including assessment of immunogenicity and PKs or pharmacodynamics)PKs) that are sufficient to demonstrate safety, purity and potency.potency in one or more appropriate conditions of use for which the reference product is licensed and for which licensure is sought for the biological product. The FDA recommends that sponsors use a stepwise approach to developing the data and information needed to support biosimiliarity.biosimilarity. At each step, the sponsor should evaluate the extent of residual uncertainty of biosimilarity that remains and incorporate the FDA’s advice for additional studies to address remaining uncertainty. To meet the higher standard for interchangeability the sponsor must demonstrate, in addition to biosimilarity, that the proposed biological product can be expected to produce the same clinical result and, if administered more than once to any given patient, the safety risk and potential for diminished efficacy associated with switching between the proposed biological product and the reference product is not greater than continuing to use the reference product. A biological product that is determined to be interchangeable may be substituted for the reference product without the intervention of the prescribing healthcare provider. In March 2015, the FDA approved the first biosimilar product under the BPCIA, and it has approved other biosimilar products since then. If any of our product candidates is approved by the FDA, the approval of a biologic product biosimilar to one of our products could have a material impact on our business. In particular, a biosimilar could be significantly less costly to bring to market and priced significantly lower than our products, if approved by the FDA.
The ‘‘Purple"Purple Book,’’" first published by the FDA in September 2014, lists biological products, including any biosimilar and interchangeable biological products licensed by the FDA under the PHSA. The lists include the date a biological product was licensed under Section 351(a) of the PHSA and whether the FDA evaluated the biological product for reference product exclusivity under Section 351(k)(7) of the PHS Act.PHSA. The Purple Book will also enable a user to see whether a biological product licensed under Section 351(k) of the PHSA has been determined by the FDA to be biosimilar to or interchangeable with a reference biological product (an already-licensed FDA biological product).product. Biosimilar and interchangeable biological products licensed under Section 351(k) of the PHSA will be listed under the reference product to which biosimilarity or interchangeability was demonstrated.
Advertising and promotionPromotion
The FDA and other federal regulatory agencies closely regulate the marketing and promotion of biologics through standards and regulations for, among other things, direct-to-consumer advertising, communications regarding unapproved uses, industry-sponsored scientific and educational activities, and promotional activities involving the internet. A biologic cannot be commercially promoted before it is approved. After approval, promotion of a biologic can include only those claims relating to safety and effectiveness that are consistent with the labeling approved by the FDA.
Healthcare providers are permitted, however, to prescribe products for unapproved uses (also known as ‘‘off-label’’ uses) - that is, uses not approved by the FDA and therefore not described in the product’s labeling - because the FDA does not regulate the practice of medicine. However, FDA restricts manufacturers’ communications regarding unapproved uses. Broadly speaking, a manufacturer may not promote a product for an unapproved use, but may engage in non-promotional, balanced communication regarding unapproved uses under specified conditions. Failure to comply with applicable FDA requirements and restrictions in
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this area may subject a company to adverse publicity and enforcement action by the FDA, the United States Department of Justice or the DOJ,("DOJ"), or the Office of Inspector General of the United States Department of Health and Human Services or HHS,("HHS"), as well as state authorities. Such enforcement action could subject a company to a range of penalties that could have a significant commercial impact, including civil and criminal fines and agreements that materially restrict the manner in which a company promotes or distributes products.
Post-approval regulationRegulation

After regulatory approval of a product is obtained, a company is required to comply with a number of post-approval requirements. For example, as a condition of BLA approval, the FDA may require post-marketing testing, including Phase 4 clinical trials, and surveillance to further assess and monitor the product’s safety and effectiveness after commercialization. Regulatory approval of oncology products often requires that subjectspatients in clinical trials be followed for long periods to determine the overall survival benefit of the product. In addition, as a holder of an approved BLA, a company would be required to report adverse reactions and production problems to the FDA, to provide updated safety and efficacy information, and to comply with requirements concerning advertising and promotional labeling for any of its products.
The manufacturing of our product candidates is required to comply with applicable FDA manufacturing requirements contained in the FDA’s cGMP regulations. Our product candidates are manufactured at our production plant in Winnipeg, Manitoba, Canada. In the event we obtain approval from the FDA to market any of our product candidates, we will need to outsource our commercial scale manufacturing to CMOs. Quality control and manufacturing procedures must continue to conform to cGMP after approval to assure and preserve the long term stability of the biological product. Biologic manufacturers and other entities involved in the manufacture and distribution of approved biologics are also required to register their establishments and list any products they make with the FDA and to comply with related requirements in certain states. The FDA and certain state agencies periodically inspect manufacturing facilities to assess compliance with cGMP which imposes extensive procedural and substantive record keeping requirements, and other laws.
Discovery of problems with a product after approval may result in serious and extensive restrictions on a product or the manufacturer or holder of an approved BLA, as well as lead to potential market disruptions. These restrictions may include suspension of a product manufacturing until the FDA is assured that quality standards can be met, continuing oversight of manufacturing by the FDA under a ‘‘consent decree,’’ which frequently includes the imposition of costs and continuing inspections over a period of many years, as well as possible withdrawal of the product from the market. Other potential consequences include interruption of production, issuance of warning letters or other enforcement letters, refusal to approve pending BLAs or supplements to approved BLAs, product seizure or detention, and injunctions or imposition of civil and/or criminal penalties.
In addition, changes to the manufacturing process are strictly regulated, and, depending on the significance of the change, may require prior FDA approval before being implemented. FDA regulations also require investigation, correction, and reporting of any deviations from cGMP and impose reporting and documentation requirements upon a company and any third partythird-party manufacturers that a company may decide to use. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality control to maintain compliance with cGMP and other aspects of regulatory compliance.
Newly discovered or developed safety or effectiveness data may require changes to a product’s approved labeling, including the addition of new warnings and contraindications, and also may require the implementation of other risk management measures, such as additional post-market clinical trials to assess new safety risks or distribution-related or other restrictions under a REMS.
Patent Term Extension
Depending upon the timing, duration and specifics of the FDA approval of our product candidates, some of our U.S.US patents may be eligible for limited patent term extension. The provisions of the Hatch-Waxman actAct permit a patent restoration term extension of up to five years as compensation for patent term lost during product development and the FDA regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product’s approval date. The patent term restoration period is generally one-half the time between the effective date of an IND and the submission date of a BLA plus the time between the submission date of a BLA and the approval of that application. Only one patent applicable to an approved product is eligible for the extension and the application for the extension must be submitted prior to the expiration of the patent. The United States Patent and Trademark Office ("USPTO"), in consultation with the FDA, reviews and approves the application for any patent term extension or restoration. In the future, we may apply for restoration of patent term extension for one of our currently owned or licensed patents to add patent life beyond its current expiration date, depending on the expected length of the clinical trials and other factors involved in the filing of the relevant BLA.
Many other countries also provide for patent term extensions or similar extensions of patent protection for biologic products. For example, in Japan, it may be possible to extend the patent term for up to five years and in Europe, it may be possible to obtain a supplementary patent certificate that would effectively extend patent protection for up to five years.
The Foreign Corrupt Practices Act

The Foreign Corrupt Practices Act or FCPA,("FCPA") prohibits any U.S.United States individual or business from paying, offering, or authorizing payment or offering of anything of value, directly or indirectly, to any foreignnon-US official, political party or candidate
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for the purpose of influencing any act or decision of the foreignnon-US entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the United States to comply with accounting provisions requiring such companies to maintain books and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries, and to devise and maintain an adequate system of internal accounting controls for international operations.
Canadian Government Regulation
In Canada, Health Canada is responsible for the regulation of pharmaceuticals under the authority of the Food and Drugs Act and the Food and Drug Regulations. Any compound that fits under the definition of ‘‘drug’’ as defined in the Food and Drugs Act must undergo a series of trials (for example, Phase 1, 2 and 3, similar to the United States) to demonstrate it is both safe and effective before it can be marketed in Canada. Approval is based on a risk-benefit assessment, in which the therapeutic benefits are weighed against the risks associated with taking the drug.
All clinical drug trials taking place in Canada are regulated through the Food and Drug Regulations, which is supplemented by the Good Clinical Practice: Consolidated Guidelines. A failure to comply with any requirements during product development, approval, or post-approval periods may lead to administrative or judicial sanctions. These sanctions could include fines, suspension or cancellation of regulatory approvals, closure of a clinical trial, product recalls, seizure of products, operating restrictions, injunctions, criminal penalties, and criminal prosecution. Our product candidates are biologics and therefore come under the purview of the Biologics and Genetic Therapies Directorate of Health Canada. To receive approval from Health Canada, biologics, like all drugs, must be shown to be safe and effective. In addition, biologics must be shown to be of suitable quality in terms of both chemistry and manufacturing. This latter requirement increases the regulatory burden, requiring additional submissions and mandatory inspections with respect to the method of manufacture, similar to that in the United States. Health Canada also has rules relating to the approval of subsequent entry biologics in Canada, following the expiry of an innovator biologic’s data exclusivity and/or patent protection.
The Canadian drug approval process requires submission and approval of a CTA as well as approval by a Research Ethics Board before each phase of human clinical trials is commenced. Canadian clinical trial development is similar to the clinical trial phases of the United States.
Exclusivity
Canada does not currently have patent term extensions but under the Food and Drug Regulations there are data exclusivity provisions for ‘‘innovative drugs’’ that have not been previously approved in a drug by the relevant Minister and that is not a variation of a previously approved medicinal ingredient such as a salt, ester, enantiomer, or polymorph. The term of data exclusivity is presently eight years from the date of first market approval which can be extended to an additional six months for pediatric indications if an innovator includes, in its new drug submission, or any supplement to that new drug submission filed within the first five years of the eight-year data protection period, results of clinical trials which were designed and conducted with the purpose of increasing knowledge about the use of the drug in pediatric populations and which will lead to a health benefit for children.
In addition, Canada, similar to the United States, has patent/regulatory linkage provisions. The Patented Medicines (Notice of Compliance) Regulations enable a patent with claims to the medicinal ingredient, formulation, dosage form or use to be listed on the Patent Register. A second person who files a drug submission that directly or indirectly compares itself to a drug wherein there is a patent on the Patent Register will not obtain market authorization for their product until the patent term has expired, it is determined that they will not be infringing the patent, the patent is held invalid or the inclusion of the patent on the Patent Register is found to have been made through certain false statements. Although a stay pending the outcomes of any associated proceedings (up to two years) may be obtained, it can be costly, and success is not guaranteed. If a company is not successful in any such proceeding, they may be liable for damages and also may result in a competitor’s product receiving market authorization.
Advertising, Promotion and Compliance
Advertising and promotion of health products, particular prescription drugs/biologics is regulated primarily by Health Canada pursuant to the Food and Drugs Act and Regulations, by standards set by the Pharmaceutical Advertising Advisory Board, Advertising Standards Canada and industry associations, such as Innovative Medicines Canada, the national association representing Canadians who work for Canadian research-based pharmaceutical companies, and their Code of Ethical Practices.

In addition, Canada has the Competition Act and the Corruption of Foreign Public Officials Act. All of these define how drugs can be advertised and what are or are not permitted activities and interactions with public officials, healthcare professionals, the public and other stakeholders. For example, in Canada direct to consumer advertising of prescription drugs is generally prohibited. Failure to comply can result in sanctions, fines, suspension or cancellation of regulatory approvals, closure of a clinical trial, product recalls, seizure of products, operating restrictions, injunctions, criminal penalties, and criminal prosecution.
European Union and other international government regulationInternational Government Regulation
In addition to regulations in the United States, we will be subject to a variety of regulations in other jurisdictions governing, among other things, clinical trials and any commercial sales and distribution of our product candidates. Whether or not we obtain FDA approval for a product candidate, we must obtain the requisite approvals from regulatory authorities in foreign countries outside of the United States prior to the commencement of clinical trials or marketing of a product in those countries. Some countries outside of the United States have a similar process that requires the submission of a CTA much like the IND prior to the commencement of human clinical trials. In the E.U.,EU, for example, a CTA must be submitted to the competent authorities of the E.U.EU Member States where the clinical trial is conducted and to an independent ethics committee, much like the FDA and IRB, respectively. Once the CTA is approved in accordance with a country’s requirements, clinical trial development may proceed.
Marketing authorization applicationAuthorization Application for biologic medicinal products in the European Union and in other foreign countriesBiologic Medicinal Products
To obtain regulatory approval to commercialize a new drugproduct under E.U.EU regulatory systems, we must submit a marketing authorization application.
In the E.U.,EU, a marketing authorization for a medicinal product can be obtained through a centralized, mutual recognition, decentralized procedure, or national procedure (single country). The centralized procedure is mandatory for certain medicinal products, including orphan medicinal products and certain biologic products and optional for certain other products, including medicinal products that are a significant therapeutic, scientific or technical innovation, or whose authorization would be in the interest of public or animal health.
In accordance with the centralized procedure, the applicant can submit a single application for marketing authorization to the EMA which will provide a positive opinion regarding the application if it meets certain quality, safety, and efficacy requirements. Based on the opinion of the EMA, the European Commission takes a final decision to grant a centralisedcentralized marketing authorization which permits the marketing of a product in all 28 E.U.27 EU Member States and three of the four European Free Trade Association States - Iceland, Liechtenstein and Norway. Under the centralized procedure in the E.U.,EU, the maximum timeframe for the evaluation of a marketing authorization application is 210 days (excluding clock stops, when additional written or oral information is to be provided by the applicant in response to questions asked by the EMA Committee for Medicinal Products for Human Use, or CHMP).CHMP.
For other countries outside of the E.U.,EU, such as the United Kingdom and countries in Eastern Europe, Latin America or Asia, the requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary from country to country. Internationally, clinical trials are generally required to be conducted in accordance with GCPs, applicable regulatory requirements of each jurisdiction and the medical ethics principles that have their origin in the Declaration of Helsinki. If we fail to comply with applicable foreignnon-US regulatory requirements, we may be subject to, among other things, fines, suspension or withdrawal of regulatory approvals, product recalls, seizure of products, operating restrictions and criminal prosecution.
Advertising, Promotion and Compliance
In the E.U.,EU, the advertising and promotion of our products will also be subject to E.U.EU laws and E.U.EU Member States’ national laws governing promotion of medicinal products, interactions with physicians, misleading and comparative advertising and unfair commercial practices. Other E.U.EU Member State national legislation may also apply to the advertising and promotion of medicinal products. These laws require that promotional materials and advertising in relation to medicinal products comply with the product’s Summary of Product Characteristics or SmPC,("SmPC"), as approved by the competent authorities. The SmPC is the document that provides information to physicians concerning the safe and effective use of the medicinal product. The SmPC forms an intrinsic and integral part of the marketing authorization granted for the medicinal product. Promotion of a medicinal product that does not comply with the SmPC is considered to constitute off-label promotion and is prohibited in the E.U.EU. The applicable laws at the E.U.EU level and in the individual E.U.EU Member States also prohibit the direct-to-consumer advertising of prescription-only medicinal products. Violations of the rules governing the promotion of medicinal products in the E.U.EU could be penalized by administrative measures, fines and imprisonment.

During all phases of development (pre- and post-marketing), failure to comply with applicable regulatory requirements may result in administrative or judicial sanctions. These penalties imposed by the European Commission, the competent authorities of the E.U. Member States or comparable foreign regulatory authorities could include the imposition of a clinical hold on trials, refusal to approve pending applications, withdrawal of an approval, warning letters, product recalls, product seizures, total or partial suspension of production or distribution, product detention or refusal to permit the import or export of products, injunctions, fines, civil penalties or criminal prosecution. Any agency or judicial enforcement action could have a material adverse effect on us.
Regulation of in vitro diagnostic medical devices in the European Union
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In the E.U., companion diagnostics are regulated as in vitro diagnostic medical devices, or IVDs. Manufacturers of IVDs are required to comply with the Essential Requirements laid down in Annex I to the Directive 98/79/EC of the European Parliament and of the Council of 27 October 1998 on in vitro diagnostic medical devices, or the IVD Directive. Compliance with these requirements entitles manufacturers to affix the Conformité Européene, or CE, mark to their IVDs, without which they cannot be commercialized in the E.U. To demonstrate compliance with the Essential Requirements laid down in Annex I to the IVD Directive and obtain the right to affix the CE mark to the IVDs, manufacturers must undergo a conformity assessment procedure, which varies according to the type of IVDs. The IVD Directive groups IVDs into four categories based on the risks associated with relative dangers to public health and / or patient treatment by an IVD failing to perform as intended:

General IVDs;
IVDs for self-testing;
IVDs falling within the scope of Annex II, List A:
reagents and reagent products, including related calibrators and control materials, for determining the following blood groups: ABO system, rhesus (C, c, D, E, e), or anti-Kell;
reagents and reagent products, including related calibrators and control materials, for the detection, confirmation and quantification in human specimens of markers of human immunodeficiency virus, or HIV, infection (HIV 1 and 2), human T-lymphotropic virus I and II, and hepatitis B, C and D.
IVDs falling within the scope of Annex II, List B:
reagents and reagent products, including related calibrators and control materials, for determining the following blood groups: anti-Duffy and anti-Kidd;
reagents and reagent products, including related calibrators and control materials, for determining irregular anti-erythrocyte antibodies;
reagents and reagent products, including related calibrators and control materials, for the detection and quantification in human samples of the following congenital infections: rubella, toxoplasmosis;
reagents and reagent products, including related calibrators and control materials, for diagnosing the following hereditary disease: phenylketonuria;
reagents and reagent products, including related calibrators and control materials, for determining the following human infections: cytomegalovirus, chlamydia;
reagents and reagent products, including related calibrators and control materials, for determining the following human leukocyte antigen tissue groups: DR, A, B;
reagents and reagent products, including related calibrators and control materials, for determining the following tumoral marker: prostate-specific antigen;
reagents and reagent products, including related calibrators, control materials and software, designed specifically for evaluating the risk of trisomy 21;
the following device for self-diagnosis, including its related calibrators and control materials: device for the measurement of blood sugar.
Following determination of the appropriate category for an IVD, manufacturers are required to follow the related conformity assessment procedures laid down in Article 9 of the IVD Directive.

For general IVDs, a self-assessment process in accordance with Annex III of the IVD Directive and a related Declaration of Conformity by the manufacturer prior to affixing the CE mark is sufficient. In the Declaration of Conformity, the manufacturer certifies that its product complies with the Essential Requirements provided for in Annex I to the IVD Directive.
For IVD for self-testing and those falling within List A or B of Annex II to the IVD, a notified body must undertake an assessment of the conformity of the manufacturer and/or the device with the applicable provisions of the IVD Directive.
The notified body would commonly audit and examine a product technical file and the quality system for the manufacture, design, and final inspection of a medical device before issuing a CE Certificate of Conformity demonstrating compliance with the relevant Essential Requirements laid down in Annex I to the Medical Devices Directive (Council Directive 93/42/EEC of 14 June 1993 concerning medical devices, OJ No L 169/1 of 1993-07-12). Following the issuance of a CE Certificate of Conformity, manufacturers can draw up the Declaration of Conformity and affix the CE mark to the products covered by the CE Certificate of Conformity and the Declaration of Conformity.
In the European Union, companion diagnostics for EpCAM expression are regulated as general IVDs. The involvement of a notified body during the conformity assessment procedure is not, therefore, currently required. This situation will, however, change with the new Regulation on In Vitro Diagnostic Medical Devices, or IVDR, which is expected to be definitively adopted by the Council and the European Parliament by the end of the March 2017. The Regulation, which will replace the IVD Directive from May 2012, will substantially impact IVD manufacturers. In accordance with the new IVDR, companion diagnostics will be regulated as Class C IVDs and a notified body will be required to participate in the related conformity assessment procedure.
Orphan Drug Designation
The FDA may grant Orphan Drug Designation to biologics intended to treat a rare disease or condition that affects fewer than 200,000 individuals in the United States or if thea disease or condition that affects more than 200,000 individuals in the United States but there is no reasonable expectation that the cost of developing and making the drugbiologic would be recovered from sales in the United States. In the E.U., the EMA’s Committee for Orphan Medicinal Products grants Orphan Drug Designation to promote the development of products that are intended for the diagnosis, prevention or treatment of life-threatening or chronically debilitating conditions affecting not more than five in 10,000 persons in the E.U. community. Additionally, designation is granted for products intended for the diagnosis, prevention or treatment of a life-threatening, seriously debilitating or serious and chronic condition and when, without incentives, it is unlikely that sales of the drug in the E.U. would be sufficient to justify the necessary investment in developing the biologic.
In the United States, orphan drug designationOrphan Drug Designation entitles a party to financial incentives, such as opportunities for grant funding towards clinical trial costs, tax credits for certain research and user fee waivers under certain circumstances. In addition, if a product receives the first FDA approval for the indication for which it has orphan designation, the product is entitled to seven years of market exclusivity, which means the FDA may not approve any other application for the samea biologic for the same indication for a period of seven years, except in limited circumstances, such as a showing of clinical superiority over the product with orphan exclusivity. The FDA can revoke a product’s orphan drug exclusivity under certain circumstances, including when the product sponsor is unable to assure the availability of sufficient quantities of the product to meet patient needs. Orphan drug exclusivity does not prevent the FDA from approving a different drug for the same disease or condition, or the same biologic for a different disease or condition.
In the E.U.,EU, medicinal products: (a) that are used to diagnose, treat or prevent life-threatening or chronically debilitating conditions that affect no more than five in 10,000 people in the E.U.;EU; or (b) that are used to treat or prevent life-threatening, seriously debilitating or chronically debilitatingserious and chronic conditions and that, for economic reasons, would be unlikely to be developed without incentives; and (c) where no satisfactory method of diagnosis, prevention or treatment of the condition concerned exists, or, if such a method exists, the medicinal product would be of significant benefit to those affected by the condition, may be granted an orphan designation in the E.U.EU. The application for orphan designation must be submitted to the EMA and approved by the European Commission before an application is made for marketing authorization for the product. Once authorized,designated, Orphan medicinal product designation also entitles a party to financial incentives such as reduction of fees or fee waivers. Moreover, ten years of market exclusivity is granted following biologic approval.marketing authorization, if the product continues to be designated as an orphan medicinal product upon grant of the marketing authorization. During this ten-year period, with a limited number of exceptions, neither the competent authorities of the E.U.EU Member States, the EMA, or the European Commission are permitted to accept applications or grant marketing authorization for other similar medicinal products with the same therapeutic indication. However, marketing authorization may be granted to a similar medicinal product with the same orphan indication during the ten-year period with the consent of the marketing authorization holder for the original orphan medicinal product or if the manufacturer of the original orphan medicinal product is unable to supply sufficient quantities. Marketing authorization may also be granted to a similar medicinal product with the same orphan indication if this latter product is demonstrated to be safer,

more effective or otherwise clinically superior to the original orphan medicinal product. This period of market exclusivity may be reduced to six years, at the end of the fifth year, if the orphan designation criteria are no longer met, including where it can be demonstrated on the basis of available evidence that the product is sufficiently profitable not to justify maintenance of market exclusivity. Additionally, marketing authorization may be granted to a similar product during the ten-year period of market exclusivity for the same therapeutic indication at any time if:
The second applicant can establish in its application that its product, although similar to the orphan medicinal product already authorized, is safer, more effective or otherwise clinically superior;
The holder of the marketing authorization for the original orphan medicinal product consents to a second orphan medicinal product application; or
The holder of the marketing authorization for the original orphan medicinal product cannot supply enough orphan medicinal product.
There is currently no orphan drug designation in Canada.
Orphan drug designation must be requested before submission of an application for marketing approval or marketing authorization. Orphan drug designation does not convey any advantage in, ornor shorten the duration of the regulatory review and approval process.
ProxiniumVicineum for the treatment of SCCHN has received Orphan Drug Designation from the FDA and the European Medicines Agency.EMA.
Expedited Programs in the United States and Other Jurisdictions
In the United States, a product may be granted fast trackFast Track designation if it is intended for the treatment of a serious or life-threatening condition and demonstrates the potential to address unmet medical needs for such condition. With fast-trackFast Track designation, the sponsor may be eligible for more frequent opportunities to obtain the FDA’s feedback, and the FDA may initiate review of sections of a BLA before the application is complete. This ‘‘rolling review’’Rolling Review is available if the applicant provides, and the FDA approves, a schedule for the remaining information. Even if a product receives fast-trackFast Track designation, the designation can be rescinded and provides no assurance that a product will be reviewed or approved more expeditiously than would otherwise have been the case, or that the product will be approved at all.
FDA may designate a product candidate as a breakthrough therapy if it finds that the product candidate is intended, alone or in combination with one or more other product candidates or approved products, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the product candidate may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints. For product candidates designated as breakthrough therapies, more frequent interaction and communication between the FDA and the sponsor of the trial can help to identify the most efficient path for clinical development. Product candidates designated as breakthrough therapies by the FDA may also be eligible for priority review.Priority Review. We may apply for breakthrough therapy designation for some of our product candidates. However, even if we believe one of our product candidates meets the criteria for designation as a breakthrough therapy, the FDA may disagree and determine not to make such designation. In any event, the receipt of a breakthrough therapy designation for a product candidate
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may not result in a faster development process, review or approval compared to product candidates considered for approval under conventional FDA procedures and, in any event, does not assure ultimate approval by the FDA. In addition, even if one or more of our product candidates qualify as breakthrough therapies, the FDA may later decide that the product candidates no longer meet the conditions for designation.
Accelerated approval under FDA regulations allows a product designed to treat a serious or life-threatening disease or condition that provides a meaningful therapeutic advantage over available therapies to be approved on the basis of either an intermediate clinical endpoint or a surrogate endpoint that is reasonably likely to predict clinical benefit. Approvals of this kind typically include requirements for appropriate post-approval Phase 4confirmatory clinical trials to be conducted with due diligence to validate the surrogate endpoint or otherwise confirm clinical benefit and for all promotional materials to be submitted to the FDA for review prior to dissemination.
The FDA may grant priority reviewPriority Review designation to a product candidate, which sets the target date for FDA action on the application at six months from FDA filing, or eight months from the sponsor’s submission. Priority reviewReview may be granted where a product is intended to treat a serious or life-threatening disease or condition and, if approved, has the potential to provide a safe and effective therapy where no satisfactory alternative therapy exists or a significant improvement in safety or efficacy compared to available therapy. If criteria are not met for priority review,Priority Review, the standard FDA review period is ten months

from FDA filing or 12 months from sponsor submission. Priority reviewReview designation does not change the scientific/medical standard for approval or the quality of evidence necessary to support approval.
In Canada, Health Canada has a Priority Review Process, allowing for shortened review targets of eligible drug submissions. Eligibility for Priority Review is similar to that of the United States. The drug submission must be for a serious, life-threatening or severely debilitating disease or condition for which there is substantial evidence of clinical effectiveness that the drug provides (a) effective treatment, prevention or diagnosis of a disease or condition for which no drug is presently marketed in Canada; or (b) a significant increase in efficacy and/or significant decrease in risk such that the overall benefit/risk profile is improved over existing therapies, preventatives or diagnostic agents for a disease or condition that is not adequately managed by a drug marketed in Canada. Priority Review does not change the quality, safety, or efficacy requirements of the submission; it just shortens Health Canada’s target review timeline from 300 days down to 180 days.
Under the Centralized Procedure in the E.U.,EU, the maximum timeframe for the evaluation of a marketing authorization application is 210 days (excluding ‘‘clock stops,’’ when additional written or oral information is to be provided by the applicant in response to questions asked by the CHMP. Accelerated evaluation might be granted by CHMP in exceptional cases, when a medicinal product is expected to be of a major public health interest, defined by three cumulative criteria: (1) the seriousness of the disease (for example, heavy disabling or life-threatening diseases) towhich should be treated, (2) the absence or insufficiency of an appropriate alternative therapeutic approach,justified and (3) anticipation of high therapeutic benefit.assessed on a case-by-case basis. In this circumstance, EMA ensures that the opinion of CHMP is given within 150 days.
ProxiniumVicineum has received Fast Track and Priority Review designations from the FDA for the treatment of BCG-unresponsive NMIBC and Fast Track designation from the FDA.FDA for the treatment of SCCHN.
Healthcare Reform
In the United States and some foreignnon-US jurisdictions, there have been, and continue to be, a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could, among other things, prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability, or the ability of any collaborators,partners, to profitably sell any products for which we, or they, obtain marketing approval. We expect that current laws, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional downward pressure on the price that we, or any collaborators,partners, may receive for any approved products.
In the United States, the Medicare Prescription Drug, Improvement, and Modernization Act of 2003, or Medicare Modernization Act, established the Medicare Part D program and generally authorized prescription drug plan sponsors to impose limits on the number of covered drugs under their plans in a therapeutic class. The Medicare Modernization Act, including its cost reduction initiatives, could decrease the coverage and reimbursement rate that we may receive for any of our product candidates, if approved. The Centers for Medicare & Medicaid Services or CMS,("CMS"), the agency that runsadministers the Medicare program, alsoand Medicaid programs, may revise reimbursement and implement coverage restrictions. Cost reduction initiatives and changes in coverage could decrease utilization of and reimbursement for any approved products, which would then affect the price we can receive. Private payors often follow Medicare coverage policy and payment limitations in setting their own reimbursement rates. Therefore, anyAny reduction in reimbursement from federal legislationMedicare, Medicaid or regulationother government programs may leadresult in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to similar reductions in private payor reimbursement.generate revenue, attain profitability or commercialize our products.
In addition, in March 2010, the President of the United StatesObama signed one of the most significant healthcare reform measures in decades. The Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act (collectively, the "ACA") substantially changeschanged the way healthcare will beis financed by both governmental and private insurers and significantly impacts the pharmaceutical industry. The Affordable Care ActACA has impacted existing government healthcare programs and has resulted in the development of new programs. For example, the Affordable Care ActACA provides for Medicare payment for performance initiatives and improvements to the physician quality reporting system and feedback program.initiatives.    
Among the Affordable Care Act’sACA's provisions of importance to the pharmaceutical industry are the following:
an annual, non-deductible fee on any entity that manufactures or imports specified branded prescription products and biological products;
an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program ("MDRP") to 23.1% for innovator drugs and 13% for non-innovator drugs of the average manufacturer price;price ("AMP");
a new methodology by which average manufacturer priceAMP is calculated and reported by manufacturers for products that are inhaled, infused, instilled, implanted or injected and not generally dispensed through retail community pharmacies;

expansion of healthcare fraud and abuse laws, including the civil False Claims Act and the federal Anti-Kickback Statute, new government investigative powers and enhanced penalties for noncompliance;
a new partial prescription drug benefit for Medicare recipients or ("Medicare Part D,D") coverage gap discount program, in which manufacturers must agree to offer 50% point-of-sale discounts off negotiated prices of
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applicable brand products to eligible beneficiaries during their coverage gap period, as a condition for the manufacturers’ outpatient products to be covered under Medicare Part D;D (subsequent legislation increased this amount to 70% effective as of January 1, 2019);
extension of manufacturers’ Medicaid rebate liability from fee-for-service Medicaid utilization to include the utilization of Medicaid managed care organizations as well;
expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to additional individuals, thereby potentially increasing manufacturers’ Medicaid rebate liability;
expansion of the entities eligible for discounts under the Public Health Service Act's 340B pharmaceuticaldrug pricing program;
new requirements to report to CMS annually specifying financial arrangements with physicians and teaching hospitals, as defined in the Affordable Care ActACA and its implementing regulations, including reporting any ‘‘payments or other transfers of value’’ made or distributed to prescribers, teaching hospitals, and other healthcare providers and reporting any ownership and investment interests held by physicians and other healthcare providers and their immediate family members and applicable group purchasing organizations during the preceding calendar year;
a new requirement to annually report product samples that manufacturers and distributors provide to physicians;
a mandatory non-deductible payment for employers with 50 or more full-time employees (or equivalents) who fail to provide certain minimum health insurance coverage for such employees and their dependents;
establishment of the Center offor Medicare and Medicaid Innovation within CMS to test innovative payments and service delivery models; and
a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research;research
Certain provisions of the ACA have been subject to judicial challenges, as well as efforts to repeal, replace, or otherwise modify them or to alter their interpretation or implementation. For example, the Tax Cuts and
a mandatory nondeductible Jobs Act enacted on December 22, 2017, eliminated the tax-based payment for employers with 50 or more full-time employees (or equivalents)individuals who fail to provide certainmaintain minimum health insuranceessential coverage for such employeesunder section 5000A of the Internal Revenue Code of 1986, as amended, commonly referred to as the “individual mandate,” effective January 1, 2019. Further, the Bipartisan Budget Act of 2018 among other things, amended the Medicare statute, effective January 1, 2019, to reduce the coverage gap in most Medicare prescription drug plans, commonly known as the “donut hole,” by raising the manufacturer discount under the Medicare Part D coverage gap discount program to 70%. Additional legislative changes, regulatory changes and their dependents.
The Affordable Care Act also establishes an Independent Payment Advisory Board, or IPAB, which has authority to recommend certain changesjudicial challenges related to the Medicare programACA remain possible. It is unclear how the ACA and its implementation, as well as efforts to reduce expenditures byrepeal, replace, or otherwise modify, or invalidate, the program that could result in reduced payments for prescription products. The IPAB has broad discretion to propose policies to reduce expenditures, which may have a negative impact on payment rates for pharmaceutical products. A proposal made by the IPAB is required to be implemented by the U.S. federal government’s CMS unless Congress adopts a proposal with savings greater than those proposed by the IPAB. IPAB proposals may impact payments for physician and free-standing services beginning in 2015 and for hospital services beginning in 2020.ACA, or portions thereof, will affect our business.
In addition, other legislative changes have been proposed and adopted since the Affordable Care ActACA was enacted. In August 2011, forFor example, the President signed into law the Budget Control Act of 2011, which, among other things, created the Joint Select Committee on Deficit Reduction to recommend proposals in spending reductions to Congress. The Joint Select Committee did not achieve its targeted deficit reduction of an amount greater than $1.2 trillion for the years 2013 through 2021, triggering the legislation’s automatic reductions to several government programs. Subsequent legislation has extended the reduction through 2025. These reductions include aggregate reductions to Medicare payments to healthcare providers of up to 2% per fiscal year.
In January 2013, the President signed into lawas amended by the American Taxpayer Relief Act of 2012, which,among other things, led to aggregate reductions in Medicare payments for all items and services, including prescription drugs and biologics, to service providers of, on average, 2% per fiscal year beginning April 1, 2013, and due to subsequent legislation, will continue until 2030 (with the exception of a temporary suspension from May 1, 2020 through March 31, 2022). On December 10, 2021, President Biden signed a law that provides for 1% Medicare sequestration in the second quarter of 2022 and allows the full 2% sequestration thereafter until 2030. To offset the temporary suspension during the COVID-19 pandemic, in 2030, the sequestration will be 2.25% for the first half of the year, and 3% in the second half of the year.
The American Taxpayer Relief Act of 2012 also, among other things, reduced Medicare payments to several categories of healthcare providers and increased the statute of limitations period for the government to recover overpayments to providers from three to five years.
Additional legislative changes, FDAregulatory changes, or CMS regulations, guidance or interpretations could be adopted, which may impact the marketing approvals and reimbursement offor our product candidates. For example, there has been increasing legislative, regulatory, and enforcement interest in November 2015, the U.S. House of Representatives formed an Affordable Drug Pricing Task ForceUnited States with respect to advance legislation intended to control pharmaceutical drug costs and investigate pharmaceutical drug pricing practices. There have been several Congressional inquiries and the U.S. Senate has requested information from certain pharmaceutical companies in connection with an investigation into pharmaceutical drug pricing practices.
Legislativeproposed and enacted federal and state legislation and regulatory initiatives designed to, among other things, bring more transparency to product pricing, evaluate the relationship between pricing and manufacturer patient programs, and reform government healthcare program reimbursement methodologies for drug products. For example, Congress is currently considering changes regardingthat could affect our overall rebate liability. Changes under consideration include a drug price negotiation program, Medicare Part B and Part D inflation rebates, under which manufacturers would owe rebates if the Affordable Care Act remainaverage sales price or average manufacturer price of a drug were to increase faster than the pace of inflation, and Part D benefit redesign, including a proposed new manufacturer discount program.
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It is possible and appear likely in the 115th United States Congress and under the Trump Administration. We anticipate that the Affordable Care Act,ACA, as currently enacted

or may be amended in the future, as well as other healthcare reform measures that may be adopted in the future, may result in additional reductions in Medicare and other healthcare funding, more rigorous coverage criteria, and new payment methodologies and in additional downward pressure on coverage and payment and the price that we receive for any approved product. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors.
Coverage, pricingPricing and reimbursementReimbursement
Significant uncertainty exists as to the coverage and reimbursement status of any products for which we obtain regulatory approval. In the United States and in other countries, sales of any products for which we receive regulatory approval for commercial sale will depend in part on the availability of reimbursement from third-party payors. Third-party payors include government health administrative authorities, managed care providers, private health insurers and other organizations. The process for determining whether a payor will provide coverage for a biologic may be separate from the process for setting the price or reimbursement rate that the payor will pay for the biologic. Third-party payors may limit coverage to specific products on an approved list, or formulary, which might not include all of the products approved by the FDA, Health Canada or comparable foreignnon-US regulatory authorities for a particular indication or if a product is included it may not be listed on the formulary for all the indications or it may be listed on a narrower basis than what is approved by the FDA, Health Canada or comparable foreignnon-US regulatory authorities. Third-party payors are increasingly challenging the price and examining the medical necessity and cost-effectiveness of medical products and services, in addition to their safety and efficacy. We may need to conduct expensive pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effectiveness of our products, in addition to the costs required to obtain FDA, Health Canada or other comparable foreignnon-US regulatory authorities’ approvals. A payor’s decision to provide coverage for a product does not imply that an adequate reimbursement rate will be approved. Adequate third partythird-party reimbursement may not be available to enable us to maintain price levels sufficient to realize an appropriate return on our investment in product development.
In 2003, the United States Congress enacted legislation providingcreating Medicare Part D, which became effective at the beginning of 2006. Government payment for some of the costs of prescription drugs may increase demand for any products for which we receive marketing approval. However, to obtain payments under this program, we would be required to sell products to Medicare recipients through prescription drug plans operating pursuant to this legislation. These plans will likely negotiate discounted prices for our products. Federal, state and local governments in the United States continue to consider legislation to limit the growth of healthcare costs, including the cost of prescription drugs. Future legislation could limit payments for pharmaceuticals such as the product candidates that we are developing.developing or modify manufacturer discounts. For example, Congress is currently considering legislation that would sunset the current Part D discount program and replace it with a new manufacturer discount program, effective 2024. Congress further could enact a Medicare Part D inflation rebate, under which manufacturers would owe rebates if the average manufacturer price of a drug were to increase faster than the pace of inflation.
Different pricing and reimbursement schemes exist in other countries. In Canada, the Patented Medicines Prices Review Board evaluates and controls excessive pricing of patented products. Further, there are national, provincial and territorial formularies funded by government healthcare systems, in addition to formularies for private payors (private insurers) and hospitals or hospital groups. Listing on the formularies and price depend on evidence and submissions regarding the cost/benefitcost-benefit of the drug and comparison of the cost-effectiveness of a particular product candidate to currently available therapies and is often subject to negotiations.
In the E.U.,EU, once a marketing authorization is granted for a medicinal product the applicant is required to engage in pricing and reimbursement discussions and negotiate with a separate pricing authority in each of the E.U.EU Member States. The E.U.EU Member States governments influence the price of pharmaceutical products through their pricing and reimbursement rules and control of national healthcare systems that fund a large part of the cost of those products to consumers. Some jurisdictions operate positive and negative list systems under which products may only be marketed once a reimbursement price has been agreed upon. To obtain reimbursement or pricing approval, some of the E.U.EU Member States may require the completion of clinical trials that compare the cost-effectiveness of a particular product candidate to currently available therapies. Other E.U.EU Member States allow companies to fix their own prices for medicines,medicinal products but monitor and control company profits. The downward pressure on healthcare costs in general, particularly pharmaceuticals, has become more intense. As a result, increasingly high barriers are being erected to the entry of new products. Furthermore, an increasing number of E.U.many EU Member States and other foreignnon-US countries use prices for medicinal products established in other countries as “reference prices” to help determine the price of the product in their own territory. Consequently, a downward trend in prices of medicinal products in some countries could contribute to similar downward trends elsewhere. The E.U.EU Member States have discretion to restrict the range of medicinal products for which their national health insurance systems provide reimbursement and to control the prices of medicinal products for human use. An E.U. Member State may approve a specific price for the medicinal product or it may instead adopt a system of direct or indirect controls on the profitability of the company placing the medicinal product on the market. We may face competition for our products, if approved, from lower priced products in foreignnon-US countries that have placed price controls on pharmaceutical products. In addition, in some countries, cross-border imports from low-priced markets exert a commercial pressure on pricing within a country.

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The sole legal instrument at the E.U. level governing the pricing and reimbursement of medicinal products is Council Directive 89/105/EEC, or the Transparency Directive. The aim of the Transparency Directive is to ensure that pricing and reimbursement mechanisms established in the E.U. Member States are transparent and objective, do not hinder the free movement and trade of medicinal products in the E.U. and do not hinder, prevent or distort competition on the market. The Transparency Directive does not provide any guidance concerning the specific criteria on the basis of which pricing and reimbursement decisions are to be made in individual E.U. Member States. Neither does it have any direct consequence for pricing nor reimbursement levels in individual E.U. Member States.

Health Technology Assessment or HTA,("HTA") of medicinal products is becoming an increasingly common part of the pricing and reimbursement procedures in some E.U.EU Member States. These E.U.EU Member States include the United Kingdom, France, Germany, Ireland, Italy and Sweden. The HTA process in European Economic Area or EEA,("EEA") countries is governed by the national laws of these countries. HTA is the procedure according to which the assessment of the public health impact, therapeutic impact and the economic and societal impact of use of a given medicinal product in the national healthcare systems of the individual country is conducted. HTA generally focuses on the clinical efficacy and effectiveness, safety, cost, and cost-effectiveness of individual medicinal products as well as their potential implications for the healthcare system. Those elements of medicinal products are compared with other treatment options available on the market.
The outcome of HTA regarding specific medicinal products will often influence the pricing and reimbursement status granted to these medicinal products by the competent authorities of individual E.U.EU Member States. The extent to which pricing and reimbursement decisions are influenced by the HTA of the specific medicinal product vary between E.U. Member States.
Pursuant to Directive 2011/24/EU a voluntary network of national authorities or bodies responsible for HTA in the individual E.U. Member States was established. The purpose of the network is to facilitate and support the exchange of scientific information concerning HTAs. This may lead to harmonization of the criteria taken into account in the conduct of HTAs between E.U. Member States and in pricing and reimbursement decisions and may negatively affect price in at least some E.U. Member States.
The marketability of any products for which we receive regulatory approval for commercial sale may suffer if the government and third party-payorsthird-party payors fail to provide adequate coverage and reimbursement. In addition, an increasing emphasis on managed care in the United States has increased and will continue to increase the pressure on pharmaceutical pricing. Coverage policies and third partythird-party reimbursement rates may change at any time.
Even if favorable coverage and reimbursement status is attained for one or more products for which we receive regulatory approval, less favorable coverage policies and reimbursement rates may be implemented in the future.
American Society of Clinical Oncology or ASCO, value assessment("ASCO") Value Assessment for cancer treatmentsCancer Treatments
On May 31, 2016, ASCO published a framework to assess the value of cancer treatment options. The framework was developed in response to concern that new, expensive cancer treatments may not be supported by adequate medical evidence. The purpose of the framework is to provide a standardized quantification of cancer treatments and assist oncologists and patients in deciding between new cancer treatments and the standard of care. The framework takes into account a medication’s (i) efficacy, (ii) safety and (iii) cost, to derive an overall treatment value.
This framework is described by ASCO as providing a basis for a new software tool that doctors can use to assist shared decision-making with their patients. While we believe that the safety and efficacy profiles of our product candidates are potentially better than that of the standard of care and, if approved, we intend to price our products competitively, we do not know how the data will be assessed by ASCO. It is also unknown when ASCO will release a version of the software application relating to the updated framework and whether use of this application could adversely affect the assessment of any of our product candidates. If this framework and software were adopted and utilized by payors and physicians, and if our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG were to receive low ratings, this could adversely affect the price and reimbursement of our product candidates,Vicineum, if approved, reduce prescriptions and harm our business.
Other healthcare lawsHealthcare Laws and compliance requirementsCompliance Requirements
Healthcare providers, physicians and third-party payors in the United States and elsewhere will play a primary role in the recommendation and prescription of any product candidatescandidate for which we obtain marketing approval. Our future arrangements with third-party payors and customers maywill expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and relationships through which we market, sell and distribute any products for which we obtain marketing approval. In addition, we may be subject to transparency laws and

patient privacy regulation by U.S.United States federal and state governments and by governments in foreignnon-US jurisdictions in which we conduct our business. We have described below some of the key federal, state and foreignnon-US healthcare laws and regulations that may affect our ability to operate.
The federal Anti-Kickback Statute prohibits, among other things, knowingly and willfully offering, paying, soliciting or receiving remuneration to induce or in return for purchasing, leasing, ordering or arranging for the purchase, lease or order of any healthcare item or service reimbursable under Medicare, Medicaid or other federally financed healthcare programs. This statute has been interpreted to apply to arrangements between pharmaceutical manufacturers on one hand and prescribers, purchasers, and formulary managers on the other. Although there are a number of statutory exemptions and regulatory safe harbors protecting some business arrangements from prosecution, the exemptions and safe harbors are drawn narrowly and practices that involve remuneration intended to induce prescribing, purchasing or recommending may be subject to scrutiny if they do not qualify for an exemption or safe harbor. Our practices may not in all cases meet all of the criteria for safe harbor protection from federal Anti-Kickback Statute liability. The Affordable Care Act, among other things, clarified that liabilityLiability may be established under the federal Anti-Kickback Statute without proving actual knowledge of the statute or specific intent to violate it. In addition, the Affordable Care Act provides that the government may assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the civil False Claims Act (discussed below).The.
The federal civil False Claims Act prohibits, among other things, any person from knowingly presenting, or causing to be presented, a false or fraudulent claim for payment of government funds; knowingly making, using, or causing to be made or used a false record or statement material to a false or fraudulent claim to the federal government; or knowingly concealing or knowingly and improperly avoiding, decreasing, or concealing an obligation to pay money to the federal government. As a result of a modification made by the Fraud Enforcement and Recovery Act of 2009, a claim includes ‘‘any request or demand’’ for money or property presented to the U.S. government. The False
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Claims Act also permits a private individual acting as a “whistleblower” to bring actions on behalf of the federal government alleging violations of the statute and to share in any monetary recovery. Recently, several pharmaceuticalPharmaceutical and other healthcare companies have faced enforcement actions under the federal civil False Claims Act for, among other things, allegedly providing free product to customers with the expectation that the customers would bill federal programs for the product. Other companies have faced enforcement actionsproduct and for allegedly causing false claims to be submitted because of the companies’ marketing of the product for unapproved, and thus non-reimbursable, uses. In addition, a claim can be deemed to be false due to failure to comply with legal or regulatory requirements material to the government’s payment decision. False Claims Act liability is potentially significant in the healthcare industry because the statute provides for treble damages and significant mandatory penalties of $5,500 to $11,000 per false claim or statement (and $10,781 to $21,563 per false claim or statement for penalties assessed after August 1, 2016 for violations occurring after November 2, 2015).statement. Pharmaceutical and other healthcare companies also are subject to other federal false claims laws, including, among others, federal criminal healthcare fraud and false statement statutes that extend to non-government health benefit programs.statutes.
The fraud provisions of the federal Health Insurance Portability and Accountability Act of 1996 or HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH,its implementing regulations (collectively, "HIPAA"), among other things, imposesimpose criminal and civil liability for knowingly and willfully executing a scheme to defraud any healthcare benefit program, including private third party payors and knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for healthcare benefits, items or services.
The federal Physician Payment Sunshine Act, being implemented as the Open Payments Program, which requires certain pharmaceuticalmanufacturers of drugs, devices, biologics and biological manufacturers to engage in extensive tracking of payments or transfers of value to physicians and teaching hospitals and public reporting of the payment data. Pharmaceutical and biological manufacturers with productsmedical supplies for which payment is available under Medicare, Medicaid or the State Children’s Health Insurance Program are(with certain exceptions) to report annually to CMS information related to direct or indirect payments and other transfers of value to physicians and teaching hospitals, as well as ownership and investment interests held in our by physicians and their immediate family members. Beginning in 2022, applicable manufacturers also will be required to have started tracking suchreport information regarding payments on August 1, 2013, and must submit a report on or before the 90th daytransfers of each calendar year disclosing reportable payments made in the previous calendar year.value provided to physician assistants, nurse practitioners, clinical nurse specialists, certified nurse anesthetists and certified nurse-midwives.
Many states have adopted analogous laws and regulations, including state anti-kickback and false claims laws, which may apply to items or services reimbursed under Medicaid and other state programs or, in several states, regardless of the payor. Several states have enacted legislation requiring pharmaceutical companies to, among other things, establish marketing compliance programs,programs; file periodic reports with the state, including reports on gifts and payments to individual healthcare providers; make periodic public disclosures on sales, marketing, pricing, clinical trials and other activities,activities; and/or register their sales representatives, as well as torepresentatives. Some states prohibit pharmacies and other healthcare entities from providing specified physician prescribing data to pharmaceutical companies for use in sales and marketing, and tomarketing. Some states prohibit other specified sales and marketing practices.practices, including the provision of gifts, meals, or other items to certain healthcare providers, and/or offering co-pay support to patients for certain prescription drugs. All of our activities are potentially subject to federal and state consumer protection and unfair competition laws. In addition, in order to distribute products commercially, we must comply with state laws that require the registration of manufacturers and wholesale distributors of pharmaceutical products in a state, including, in some states, manufacturers and distributors who ship products into the state even if such manufacturers or distributors have no place of business within the state. Some states also impose requirements on manufacturers and distributors to establish the

pedigree of product in the chain of distribution, including some states that require manufacturers and others to adopt new technology capable of tracking and tracing product as it moves through the distribution chain.
In addition, we may be subject to data privacy and security laws and regulations by both the federal government and the states in which we conduct our business. The legislative and regulatory landscape for privacy and data protection continues to evolve, and there has been an increasing focus on privacy and data protection issues which may affect our business. Numerous federal and state laws and regulations, including state security breach notification laws, state health information privacy laws and federal and state consumer protection laws, including the California Consumer Privacy Act ("CCPA"), govern the collection, use, disclosure, and protection of health-related and other personal information. In addition, state laws govern the privacy and security of health information in specified circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts. Failure to comply with such laws and regulations could result in government enforcement actions and create liability for us (including the imposition of significant civil or criminal penalties), private litigation and/or adverse publicity that could negatively affect our business.
HIPAA as amended by HITECH and its implementing regulations, imposes requirements relating to the privacy, security and transmission of individually identifiable health information. HITECH also increased the civil and criminal penaltiesWe may obtain health information from third parties, such as research institutions, that may be imposed against covered entities, business associates and possibly other persons, and gave state attorneys general new authorityare subject to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorney’s fees and costs associated with pursuing federal civil actions. In addition, state laws govern the privacy and security ofrequirements under HIPAA. Although we are not directly subject to HIPAA other than with respect to providing certain employee benefits, we could potentially be subject to criminal penalties if we, our affiliates, or our agents knowingly obtain, use, or disclose individually identifiable health information maintained by a HIPAA-covered entity in specified circumstances, many of which differ from each other in significant ways and maya manner that is not have the same effect, thus complicating compliance efforts. authorized or permitted by HIPAA.
Other jurisdictions including Canada, have corresponding laws and regulations governing the handling of personal information and third partythird-party communications that may be more or less stringent than those of the United States. In Canada, such laws include the Personal Information Protection and Electronic Documents Act, similar provincial legislation regarding privacy and personal health information and anti-spam legislation, wherein the failure to comply or breaches can result in notification requirements or corrective action, including civil and criminal fines and sanctions.
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In the United States, our activities are potentially subject to additional regulation by various federal, state and local authorities in addition to the FDA, including CMS, other divisions of HHS (for example, the Office of Inspector General), the DOJ and individual United States Attorney offices within the DOJ, and state and local governments.
If we participate in the Medicaid drug rebate program,MDRP, we will have certain price reporting obligations to the Medicaid drug rebate program,MDRP, and we may have obligations to report average sales price or ASP,("ASP") figures to the Medicare program. Under the Medicaid drug rebate program,MDRP, we would be required to pay a rebate to each state Medicaid program for our covered outpatient drugs that are dispensed to Medicaid beneficiaries and paid for by a state Medicaid program as a condition of having federal funds being made available to the states for our drugs under Medicaid and Medicare Part B. Those rebates arewould be based on pricing data reported by us on a monthly and quarterly basis to CMS. These data would include average manufacturer price, or AMP and, in the case of innovator products, the best price for each drug which, in general, represents the lowest price available from the manufacturer to any entity in the United States in any pricing structure, calculated to include all sales and associated rebates, discounts and other price concessions. On December 21, 2020, CMS issued a final rule that modified MDRP regulations to permit reporting multiple best price figures with regard to value based purchasing arrangements (beginning in 2022); provide definitions of “line extension,” “new formulation,” and related terms with the practical effect of expanding the scope of drugs considered to be line extensions (beginning in 2022); and revise best price and AMP exclusions of manufacturer-sponsored patient benefit programs, including with respect to the potential inapplicability of such exclusions in the context of pharmacy benefit manager “accumulator” programs (beginning in 2023).
Federal law also requires that a company that participates in the Medicaid drug rebate programMDRP report ASP information each quarter to CMS for certain categories of drugs that are paid under Part B of the Medicare program. Manufacturers calculate ASP based on a statutorily defined formula and interpretations of the statute by CMS.statute. CMS uses these submissions to determine payment rates for drugs under Medicare Part B. For calendar quarters beginning January 1, 2022, manufacturers will be required to report the average sales price for certain drugs under the Medicare program regardless of whether they participate in the Medicaid Drug Rebate Program. In addition, starting in 2023, manufacturers must pay refunds to Medicare for single source drugs or biologicals, or biosimilar biological products, reimbursed under Medicare Part B and packaged in single-dose containers or single-use packages for units of discarded drug reimbursed by Medicare Part B in excess of 10 percent of total allowed charges under Medicare Part B for that drug. Manufacturers that fail to pay refunds could be subject to civil monetary penalties of 125 percent of the resulting Medicare payment rate.refund amount.
Federal law requires that any company that participates in the Medicaid drug rebate programMDRP also participate in the Public Health Service’s 340B drug pricing program in order for federal funds to be available for the manufacturer’s drugs under Medicaid and Medicare Part B. The 340B drug pricing program requires participating manufacturers to agree to charge statutorily-definedstatutorily defined covered entities no more than the 340B “ceiling price” for the manufacturer’s covered outpatient drugs. The Health Resources and Services Administration ("HRSA"), which administers the 340B program, issued a final regulation regarding the calculation of the 340B ceiling price and the imposition of civil monetary penalties on manufacturers that knowingly and intentionally overcharge covered entities, which became effective on January 1, 2019. HRSA also has implemented a ceiling price reporting requirement, pursuant to which manufacturers must report the 340B ceiling prices for their covered outpatient drugs to HRSA on a quarterly basis. HRSA then publishes those prices to 340B covered entities. Moreover, under a final regulation effective January 13, 2021, HRSA newly established an administrative dispute resolution (“ADR”) process for claims by covered entities that a manufacturer has engaged in overcharging, and by manufacturers that a covered entity violated the prohibitions against diversion or duplicate discounts. Such claims are to be resolved through an ADR panel of government officials rendering a decision that could be appealed only in federal court. An ADR proceeding could subject a manufacturer to onerous procedural requirements and could result in additional liability. HRSA further could terminate a manufacturer’s agreement to participate in the 340B program for a failure to comply with 340B program requirements. In the event that HRSA were to terminate such an agreement, federal payments may not be available under Medicaid or Medicare Part B for our covered outpatient drugs that we are able to successfully commercialize.
In addition, in order to be eligible to have its products paid for with federal funds under the Medicaid and Medicare Part B programs and purchased by certain federal agencies and grantees, a manufacturer also must participate in the Department of Veterans Affairs Federal Supply Schedule or FSS,("FSS") pricing program, established by Section 603 of the Veterans Health Care Act of 1992. Under this program, the manufacturer is obligated to make its “covered drugs” (biologics or innovator drugs) available for procurement on an FSS contract and charge a price to four federal agencies - Department of Veterans Affairs, Department of Defense, Public Health Service and Coast Guard - that is no higher than the statutory federal ceiling price. We also expect to participate in the Tricare Retail Pharmacy Program, under which we would pay quarterly rebates to DoD for prescriptions of innovator drugs dispensed to Tricare beneficiaries through Tricare Retail network pharmacies. The requirements under the 340B and FSS programs could reduce the revenue we may generate from any products that are commercialized in the future and could adversely affect our business and operating results.
Pricing and rebate calculations vary among products and programs. The calculations are complex and are often subject to interpretation by manufacturers, governmental or regulatory agencies, and the courts. The Medicaid rebate amount for each manufacturercovered outpatient drug is computed each quarter based on the manufacturer’s submission to CMS of its current AMP and, in
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the case of innovator products, best price figures, for the quarter. If we participate in the Medicaid drug rebate programMDRP and become aware

that our reporting for a prior quarter was incorrect, or has changed, we will be obligated to resubmit the corrected data for a period not to exceed twelve quarters from the quarter in which the data originally were due. Such restatements and recalculations would increase our costs for complying with the laws and regulations governing the Medicaid drug rebate program.MDRP. Any corrections to our rebate calculations could result in an overage or underage in our rebate liability for past quarters, depending on the nature of the correction. Price recalculations also may affect the ceiling price at which we would be required to offer our products to certain covered entities, such as safety-net providers, under the 340B drug discount program.program, and we may be obligated to issue refunds to covered entities.
If we participate in the Medicaid drug rebate programMDRP or our products are covered under Medicare Part B, we will be liable for errors associated with our submission of pricing data. We cannot assure you that our submissions, if we participate in these programs, will not be found by CMS to be incomplete or incorrect. In addition to retroactive rebates and the potential for 340B program refunds, if we are found to have knowingly submitted false AMP, ASP or best price information to the government, we may be liable for civil monetary penalties per item of false information. If we are found to have made a misrepresentation in the reporting of our ASP, the Medicare statute provides for civil monetary penalties for each misrepresentation for each day in which the misrepresentation was applied. Civil monetary penalties also can be applied if we are found to have intentionally charged 340B covered entities more than the statutorily mandated ceiling price. Our failure to submit monthly/quarterly AMP, ASP and best price data on a timely basis could result in a civil monetary penalty per day for each day the information is late beyond the due date. Such failure also could be grounds for CMS to terminate our Medicaid drug rebate agreement, pursuant to which we would participate in the Medicaid program. In the event that CMS terminates our rebate agreement, federal payments may not be available under Medicaid or Medicare Part B for our covered outpatient drugs that we are able to successfully commercialize.
Because of the breadth of these laws and the narrowness of available statutory and regulatory exemptions, it is possible that some of our business activities could be subject to challenge under one or more of such laws. If our operations are found to be in violation of any of the federal and state laws described above or any other governmental regulations that apply to us, we may be subject to penalties, including (depending on the applicable law) criminal and significant civil monetary penalties, damages, fines, imprisonment, exclusion from participation in government programs, injunctions, recall or seizure of products, total or partial suspension of production, denial or withdrawal of pre-marketing product approvals, private ‘‘qui tam’’ actions brought by individual whistleblowers in the name of the government or refusal to allow us to enter into supply contracts, including government contracts, and the curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and our results of operations. To the extent that any of our products are sold in a foreignnon-US country, we may be subject to similar foreignnon-US laws and regulations, which may include, for instance, applicable post-marketing requirements, including safety surveillance, anti-fraud and abuse laws, and implementation of corporate compliance programs and more extensive reporting of payments or transfers of value to healthcare professionals.
In the E.U.,EU, interactions between pharmaceutical companies and physicians are also governed by strict laws, regulations, industry self-regulation codes of conduct and physicians’ codes of professional conduct in the individual E.U.EU Member States. The provision of benefits or advantages to physicians to induce or encourage the prescription, recommendation, endorsement, purchase, supply, order or use of medicinal products is prohibited. The provision of benefits or advantages to physicians is also governed by the national anti-bribery laws of the E.U.EU Member States. One example isStates and by the UKUnited Kingdom's Bribery Act 2010. This act applies to any company incorporated in or “carrying on business” in the UK, irrespective of where in the world the alleged bribery activity occurs. Violation of these laws could result in substantial fines and imprisonment.
The national laws of certain E.U.EU Member States require payments made to physicians to be publicly disclosed. Moreover, the European Federation of Pharmaceutical Industries and Associations or EFPIA("EFPIA") Code on disclosure of transfers of value from pharmaceutical companies to healthcare professionals and healthcare organizations imposes a general obligation on members of EFPIA or related national industry bodies to disclose transfers of value to healthcare professionals. In addition, agreements with physicians must often be the subject of prior notification and approval by the physician’s employer, his/her competent professional organization, and/or the competent authorities of the individual E.U.EU Member States. These requirements are provided in the national laws, industry codes, or professional codes of conduct, applicable in the individual E.U.EU Member States.
If we fail to comply with applicable foreignnon-US regulatory requirements, we may be subject to, among other things, warning letters or untitled letters, injunctions, civil, administrative, or criminal penalties, monetary fines or imprisonment, suspension or withdrawal of regulatory approvals, suspension of ongoing clinical studies, refusal to approve pending applications or supplements to applications filed by us, suspension or the imposition of restrictions on operations, product recalls, the refusal to permit the import or export of our products or the seizure or detention of products.
Environmental and safety lawsSafety Laws
We are subject to a variety of federal, provincial and local regulations relating to the use, handling, storage and disposal of hazardous materials, including chemicals and radioactive and biological materials. Our operations involve such hazardous materials and produce such hazardous waste products. Although we believe that our safety procedures for handling

and disposing of these materials comply with the standards prescribed by federal, provincial and local regulations, the risk of accidental contamination or injury from these materials cannot be eliminated. Radioactive materials in Canada come under
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federal jurisdiction. Canada’s Nuclear Safety and Control Act 1997 c.9 contains a general prohibition against any activity, including possession of radioactive material, except in accordance with the terms and conditions set out in a federal license issued by the Canadian Nuclear Safety Commission. The Nuclear Substances and Radiation Devices Regulation does however, exempt licensing requirements for small quantities of radioactive substances that either meet concentrations set out in a schedule to the Regulation or, for radioactive substances not set out in the schedule, that meet certain regulatory criteria. Our operations do not currently require a federal license issued by the Canadian Nuclear Safety Commission. Our manufacturing facilityoperations in Winnipeg, Manitoba, Canada is alsomay be subject to license approvals, notification requirements and investigation and enforcement for air and water and waste matters under the Province of Manitoba’s Environment Act CCSM c.E125. For hazardous, including radioactive materials, Manitoba’s Dangerous Goods Handling and Transportation Regulation Man Reg 55/2003 adopts as law the federal Transportation of Dangerous Goods Regulations SOR/2001-286. This federal law addresses the documentation, labeling and packaging of the hazardous material. Finally, for occupational health and safety matters Manitoba’s Workplace Safety and Health Act CCSM c W210 applies.matters.
Corporate History -and Acquisition of Viventia
We were incorporated under the laws of the State of Delaware in 2008. We were formerly known as Denovo Therapeutics, Inc. and Newco LS14, Inc. before changing our name to Eleven Biotherapeutics, Inc. Our principal executive offices are located at 245 First Street, Suite 1800, Cambridge, Massachusetts 02142,in February 2010 and our telephone number is (617) 444-8551.again to Sesen Bio, Inc. in May 2018.
OnIn September 20, 2016, we entered into a Share Purchase Agreement with Viventia Bio, Inc., a corporation incorporated under the laws of the Province of Ontario, Canada, the shareholders of Viventia named therein - collectively referred to herein as(collectively, the “Selling Shareholders” -"Selling Shareholders") and, solely in its capacity as seller representative, Clairmark an affiliateInvestments Ltd., a corporation incorporated under the laws of Leslie Dan, onethe Province of our directors,Ontario, Canada (“Clairmark”), pursuant to which we agreed to and simultaneously completed the acquisition of all of the outstanding capital stock of Viventia from the Selling Shareholders referred to herein as the “Acquisition.”(the "Viventia Acquisition"). In connection with the closing of the Viventia Acquisition, we issued 4,013,4314.0 million shares of our common stock to the Selling Shareholders according to their pro rata share of Viventia’s then-outstanding shares of common stock, which represented approximately 19.9% of our voting power as of immediately prior to the issuance of such shares of common stock. Clairmark is an affiliate of Leslie L. Dan, who served on our board of directors until his retirement in July 2019.
In connection with the Viventia Acquisition, we are obligated to pay to the sellersSelling Shareholders certain post-closing contingent cash payments upon the achievement of specified milestones and based upon net sales, in each case subject to the terms and conditions set forth in the acquisition agreement, including: (i) a one-time milestone payment of $12.5 million payable upon the first sale of Vicinium or any variant or derivative thereof, other than Proxinium (referred to herein as the Purchased Product)Vicineum (the "Purchased Product"), in the United States; (ii) a one-time milestone payment of $7.0 million payable upon the first sale of the Purchased Product in any one of certain specified European countries; (iii) a one-time milestone payment of $3.0 million payable upon the first sale of the Purchased Product in Japan; and (iv) and quarterly earn-out payments equal to two percent (2%) of net sales of the Purchased Product during specified earn-out periods. Such earn-out payments are payable with respect to net sales in a country beginning on the date of the first sale in such country and ending on the earlier of (i) December 31, 2033, and (ii) fifteen years after the date of such sale, subject to early termination in certain circumstances if a biosimilar product is on the market in the applicable country.
Under the Share Purchase Agreement, we, our affiliates, licensees and subcontractors are required to use commercially reasonable efforts, for the first seven years following the closing of the Viventia Acquisition, to achieve marketing authorizations throughout the world and, during the applicable earn-out period, to commercialize the Purchased Product in the United States, France, Germany, Italy, Spain, United Kingdom, Japan, China and Canada.
EmployeesHuman Capital
Our key human capital management objectives are to recruit, retain, manage and motivate our employees. There are a limited number of individuals in our industry with the breadth of skills and experience required to successfully develop, gain regulatory approval of and commercialize products. Competition to hire from this limited pool is intense given the numerous pharmaceutical and biotechnology companies looking for similar personnel as well as universities and research institutions. We rely on our executive officers and other key employees to achieve our research, development and commercialization objectives and to successfully implement our business strategy. We also rely on consultants and advisors, including scientific and clinical advisors, to assist us in formulating our research and development and commercialization strategy.
We are committed to maintaining a diverse and inclusive workplace in which our employees from all backgrounds can fully contribute to the growth and success of our business. We communicate shared values and leadership behaviors, which are expected of all employees. Additionally, every employee has an annual performance review and has opportunities to contribute to corporate goals. We rely on a variety of sources to fill open positions, including job boards and postings on our corporate website.
We have a demonstrated history of investing in our workforce through comprehensive and competitive compensation and benefits, and a focus on health and employee wellbeing. We have adopted our 2014 Stock Incentive Plan ("2014 Plan") and Employee Stock Purchase Plan (“ESPP”) to enable us and our subsidiaries to recruit and retain highly qualified employees, directors and consultants, provide those individuals with an incentive for productivity, and provide those individuals with an opportunity to share in our growth and value.
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As of December 31, 2016,2021, we had 34thirty-five full-time employees and oneno part-time employee, eight of whom are term specific employees, sixnine hold Ph.D. degrees and one is a medicalveterinary doctor. This number consists of sevenfifteen employees engaged in administration ten employees engaged in clinical activities, twoand twenty employees engaged in research and development eight employees engaged(eight in operations (five in manufacturingclinical and regulatory, three in facility/engineering)supply chain, five in manufacturing/engineering, and eight employees engagedfour in quality and support. Fivesupport). Two of our employees are located in our corporate headquarters in Boston, 26Cambridge, fifteen of our employees are located in our Winnipeg facility, two of our employees are located in our Toronto office and twofive of our employees are located in our Philadelphia office. We have no collective bargaining agreements with our employees, and none are represented by labor unions. We have not experienced any work stoppages. We believe our relationship with our employees is satisfactory.

Since the beginning of the COVID-19 pandemic, approximately 30% of our employees have continued to work at our Winnipeg facility, where we have adopted health screening, implemented socially distancing and personal protective equipment requirements, enhanced cleaning and sanitation protocols, and modified workspaces to reduce the potential for transmission of the virus. All other employees who do not require access to our facility to perform their work have been working from home during the pandemic.

Corporate Information and Access to SEC Reports
Item 1A.Risk Factors
Our principal executive offices are located at 245 First Street, Suite 1800, Cambridge, Massachusetts 02142, our telephone number is (617)-444-8550 and our website address is www.sesenbio.com. We make our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports, available free of charge in the “Investors” section of our website as soon as reasonably practicable after we file these reports with the SEC. We routinely post these reports, recent news and announcements, financial results and other important information about our business on our website at www.sesenbio.com. Information contained on our website is not a part of this Annual Report on Form 10-K.
In addition, the SEC maintains an Internet website at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

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Item 1A.    Risk Factors.
Our business is subject to substantial risks and uncertainties. The occurrence of any of the following risks and uncertainties, either alone or taken together, could materially and adversely affect our business, financial condition, results of operations or prospects. In these circumstances, the market price of our common shares could decline, and you may lose all or part of your investment. The risks and uncertainties described below are not the only ones we face. Risks and uncertainties of general applicability and additional risks and uncertainties not currently known to us or that we currently deem to be immaterial may also materially and adversely affect our business, financial condition, results of operations or prospects.
Risks Related to Our Financial Position and Need Forfor Additional Capital
We have incurred significant losses since our inception and anticipate that we will continue to incur losses for the foreseeable future.
We are a specialty pharmaceutical company with a limited operating history. Over the past few years, we have focused primarily on developing our lead product candidate, Vicineum. Since our inception, we have received no revenues from sales of our products, have incurred significant operating losses and expect to continue to incur operating losses for the foreseeable future.future as we continue the clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and seek marketing approval from the FDA. We had net incomelosses of $1.9$0.3 million, $22.4 million and $107.5 million for the yearyears ended December 31, 2016 due to the $29.62021, 2020 and 2019, respectively. We incurred negative cash flows from operating activities of $68.9 million, of revenue from the License Agreement; however, we have incurred net losses of $33.5$30.8 million and $37.5 million for the yearyears ended December 31, 20152021, 2020 and $34.2 million for the year ended December 31, 2014.2019, respectively. As of December 31, 2016,2021, we had cash and cash equivalents of $162.6 million, net working capital (current assets less current liabilities) of $194.0 million and an accumulated deficit of $123.3$316.3 million. To date, weWe have financed our operations to date primarily through private placements of our common stock, and preferred stock, common stock warrants and convertible bridge notes, venture debt borrowings, and our initial public offering or IPO,("IPO"), our follow-on public offerings, sales effected in an "at-the-market" offering throughat-the-market ("ATM") offerings and, our agent, Cowenout-licensing and Company, LLC, through our License Agreement with Roche and, to a lesser extent, from a collaboration. Substantially allOUS business development partnership agreements. The majority of our revenue to date has been licensing revenue from milestone payments received under our License Agreement with Rocheout-licensing and collaboration revenue. We have devoted substantially all of our financial resources and efforts to research andOUS business development activities. We are still in the early stages of development of certain of our product candidates, and we have not completed development of any product candidates. partnership agreements. We expect to continue to incur significant expenses and operating losses over the next several years. Our net losses may fluctuate significantly from quarter to quarterquarter-to-quarter and year to year.year-to-year.
We willexpect to incur substantial expenses iflosses for the foreseeable future, and we expect these losses to increase as we:
continue our planned Phase 3 clinical trial for Vicinium and initiate our Phase 1/2a clinical trial for Proxinium;
continue the research and pre-clinical and clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
seek marketing approval for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG in the United States and the European Union;
establish a commercialization infrastructure and scale up external manufacturing and distribution capabilities to commercialize Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved;
adapt our other product candidates;regulatory compliance efforts to incorporate requirements applicable to marketed drugs;
seek and conduct combination trials of one or more of our product candidates;
seek to discover and develop additional product candidates;
in-license or acquire the rights to other products, product candidates or technologies; and
seek marketing approvals for any product candidates that successfully complete clinical trials;
establish sales, marketing and distribution capabilities and scale up and validate external manufacturing capabilities to commercialize any product candidates for which we may obtain marketing approval;
maintain, expand and protect our intellectual property portfolio;
add equipment and physical infrastructure to support our research and development;
hire additional clinical, quality control, scientific and management personnel; and
expand our operational, financial and management systems and personnel.
Because of the numerous risks and uncertainties associated with pharmaceutical productdrug development and commercialization, we are unable to accurately predict the timing or amount of increased expenses or when, or if, we will be able to achieve profitability. Our expenses will increase substantially if:
If we are required by the FDA, the EMA or Health Canadaregulatory authorities to perform studies or clinical trials in addition to those currently expected;expected or
if there are any delays in enrollmentthe initiation and completion of subjects in, or completing our clinical trials or the development of any of our product candidates, that we may develop.our expenses could increase.
With the exception of specified regulatory, development and commercial milestones under our License Agreement with Roche,out-licensing and OUS business development partnership agreements, we currently have no source of product revenue and may never become profitable.
Our ability to become and remain profitable depends on our ability to generate revenue. Although we may be entitled to certain licensing fees related to specific regulatory, development and commercial milestones for EBI-031payments under our License Agreement with Roche,out-licensing and OUS business development partnership agreements, neither we nor any of our business development partners have not commercialized any of our product candidates. We do not expect to generate significant revenue from the development of our product candidates unless and until we or one of our business development partners obtain marketing approval for, and commercialize, Vicinium, ProxiniumVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or our other product candidates that we may develop, in-licenseless than adequate BCG. Our ability to generate revenue from Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or acquire in the future. This would require us to be successful inless than adequate BCG will depend on a range of challenging activities, including:

successfully completing development activities, including clinical trial design and enrollment of a sufficient number of subjects in factors, including:
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our clinical trials and completion of the necessary clinical trials;
completing and submitting BLAsability to the FDA and obtainingobtain regulatory approval for, indicationsand successfully commercialize, Vicineum for which there is a commercial market;the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
completingour ability to complete and submittingsubmit applications to, and obtaining regulatory approval from, foreignnon-US regulatory authorities, including Health Canadaauthorities;
the size of the markets in the territories for which we or our business development partners gain regulatory approval;
our ability to find a suitable contract sales organization ("CSO") to help us market and the European Commission;promote Vicineum, if approved;
establishingour ability to develop and maintain effective medical affairs, sales, marketing and distribution capabilities, either ourselves or through collaborations or other arrangements with third parties, to effectively market and sell our product candidates;
achieving an adequate level of market acceptance of our product candidates;
successfully commercializing any product candidates,Vicineum, if approved;
protecting our rightsability to enter into and maintain commercially reasonable agreements with wholesalers, distributors and other third parties in our intellectual property portfolio;supply chain;
ensuring theour success in establishing a commercially viable price for Vicineum, if approved;
our success in defending against potential competition and other developments in our market generally;
our ability to manufacture of commercial quantities of Vicineum at acceptable cost levels;
our product candidates;
finding suitable partnersability to help us develop certain of our product candidates and market, sell and/or distribute any of our products that receive regulatory approval in other markets; and
obtaining adequate pricing,obtain coverage and adequate reimbursement from third parties,third-party payors, including government payors; and
our and private payors.our business development partners' ability to successfully complete development activities, including necessary clinical trials, for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
We are onlyEven if Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG is approved for commercial sale, Vicineum may not gain market acceptance or achieve commercial success. If our addressable market is not as significant as we estimate, the preliminary stagesindication approved by regulatory authorities is narrower than we expect or the treatment population is narrowed by competition, physician choice or clinical practice guidelines, we may not generate significant revenue from sales of most of these activities.Vicineum. In addition, we would anticipate incurring significant costs associated with commercializing Vicineum, if approved. We may never succeed in these activitiesnot achieve profitability soon after generating product sales from Vicineum, if ever. If we are unable to generate product revenues from Vicineum, we will not become profitable and even if we do, may never generate revenues that are significant enoughbe unable to achieve profitability.continue operations without continued funding.
Even if we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become and remain profitable would depress the value of our company and could impair our ability to raise capital, expand our business, maintain our research and development efforts, obtain drug approvals, diversify our product offerings or even continue our operations. A decline in the value of our company could also cause our stockholdersyou to lose all or part of theiryour investment.
We will need substantial additional funding. If we are unable to raise capital when needed, we could be forced to delay, reduce or eliminate our product development programs or commercialization efforts.
We are devoting substantial financial resources to our ongoing and planned activities, including a new Phase 3 clinical trial for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and functions associated with operating as a public company. We expect to continue to spend substantial amounts to continue the clinical development of fundsVicineum for the treatment of non-muscle invasive CIS of the bladder in connectionpatients previously treated with our ongoing activities, particularly as we continue our Phase 3 clinical trial for Vicinium, initiate our Phase 2 clinical trial for Proxinium,adequate or less than adequate BCG, and, continue research and development activities. In addition, if we obtain regulatory approval for any of our product candidates, we would need to devote substantial financial resources to commercialization efforts, including product manufacturing, marketing, sales and distribution.approved, commercialize Vicineum. Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise capital when needed or on attractive terms, we could be forced to delay, reduce or eliminate our research and development programs or any future commercialization efforts.
Our future capital requirements will depend on many factors, including:
the initiation, progress, timing, costs and resultstiming of continuing the clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
the success of our commercialization of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved;
the outcome, timing and cost of the regulatory approval process for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG by the FDA and comparable non-US regulatory authorities, including the potential for the FDA to require that we perform more studies and clinical trials for our product candidates;than those we currently expect;
the scope, progress, resultscosts and coststiming of pre-clinical development and laboratory testingthe implementation of our pre-clinical product candidates;commercial-scale manufacturing activities;
our ability to establish collaborationsand maintain commercial arrangements on favorable terms, if at all, particularly manufacturing, marketing and distribution arrangements for our product candidates;
Vicineum for the costs and timingtreatment of non-muscle invasive CIS of the implementation of commercial-scale manufacturing activities;bladder in patients previously treated with adequate or less than adequate BCG;
the costs and timing of establishing sales, marketing and distribution capabilities for any product candidates for which we may receive regulatory approval;
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the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending any intellectual property-related claims;

our obligation to make milestone, royalty and other payments to third party licensors under our licensingin-licensing agreements;
the extent to which we in-license or acquire rights to other products, product candidates or technologies; and
the outcome, timing and cost of regulatory review by the FDA and comparable foreign regulatory authorities, including the potential for the FDA or comparable foreign regulatory authorities, including Health Canada or the EMA, to require that we perform more studies than those that we currently expect;
the effect of competing technological and market developments; and
the revenue, if any, received from commercial sales of any product candidates for which we receive regulatory approval.developments.
We cannot be certain that additional funding will be available when needed on acceptable terms, or at all. If we are unable to raise additional capital in sufficient amounts, when required or on acceptable terms, we also could be required to:
seek out-licensing or commercialization partners to assist in the clinical development or commercialization of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG in the United States and other markets;
delay, limit, reduce or terminate the clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG; or
significantly curtail our operations.
Based on our current operating plan, we believe that our cash and cash equivalents of $25.3$162.6 million as of December 31, 20162021, will be sufficient to fund our current operating planoperations into early 2018;2024; however, we have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources soonermay be utilized faster than we currently expect.
Identifying potential product candidates and conducting pre-clinical testing and clinical trials is a time-consuming, expensive and uncertain process that takes years to complete, and we may never generate the necessary data or results required to obtain regulatory approval and achieve product sales. Our commercial revenues, if any, will be derived from sales of any product candidates that we successfully develop, none of which we expect to be commercially available for many years, if at all. In addition, if approved, any product candidate that we develop or any product that we in-license may not achieve commercial success. Accordingly, we will need to obtain substantial additional financing to achieve our business objectives. Adequate additional financing may not be available to us on acceptable terms, or at all. In addition, we may seek additional capital due to favorable market conditions or strategic considerations, even if we believe we have sufficient funds for our current or future operating plans.
Our independent registered public accounting firm has included an explanatory paragraph relating to our ability to continue as a going concern in its report on our audited financial statements included in our Annual Report on Form 10-K.
Our report from our independent registered public accounting firm for the year ended December 31, 2016 includes an explanatory paragraph stating that our recurring losses from operations and insufficient cash resources raise substantial doubt about our ability to continue as a going concern. If we are unable to obtain adequate financing or engage in another strategic transactions on acceptable terms and when needed, our business, prospects, financial condition and results of operations will be materially and adversely affected and we may be unable to continue as a going concern. While we believe that our cash and cash equivalents will be sufficient to fund our current operating plan into early 2018, given our planned expenditures for the next several years, we and our independent registered public accounting firm have concluded that there is still a substantial doubt regarding our ability to continue as a going concern. If we are unable to continue as a going concern, we may have to liquidate our assets and may receive less than the value at which those assets are carried on our audited financial statements, and it is likely that investors will lose all or a part of their investment. If we seek additional financing to fund our business activities in the future and there remains substantial doubt about our ability to continue as a going concern, investors or other financing sources may be unwilling to provide additional funding to us on commercially reasonable terms or at all.
Future sales and issuances of shares of our common stock or rights to purchase shares of our common stock, including pursuant to our 2014 Stock Incentive Plancommon stock purchase warrants and 2009 Stock Incentive Plan,stock options, could result in additional dilution of the percentage ownership of our stockholders, restrict our operations or require us to relinquish rights to our technologies or product candidates.
Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of equity offerings, debt financings, government or other third-party funding, collaborations,licensing and OUS business development partnership agreements, strategic alliances licensing arrangements and marketing and distribution arrangements and other commercial arrangements. We do not have any committed external source of funds other than the amounts payable under the License Agreement with Roche.our out-licensing and OUS business development partnership agreements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, our stockholders’ ownership interest will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect our stockholders’ rights as holders of our common stock. For example, in September 2016, we acquired Viventia in an all-stock transaction pursuant to which we issued 4,013,431 shares of our common stock to the Selling Stockholders, which resulted in further dilution to our existing stockholders.
We have also adopted the 2014 Stock Incentive Plan, or the 2014 Plan to enable us and our subsidiaries to recruit and retain highly qualified employees, directors and consultants, provide those individuals with an incentive for productivity, and provide those individuals with an opportunity to share in our growth and value. As of December 31, 2016,2021, we had 1,088,303an aggregate of 15.8 million stock options and RSUs outstanding under the 2014 Plan, our prior equity plan and inducement awards granted outside of our equity plans. In addition, as of December 31, 2021, we had 8.9 million shares of

common stock available for issuancegrant under theour 2014 Plan. Future equity incentive grants and issuances of shares of common stock under the 2014 Plan, or other grants outside of the 2014 Plan pursuant to inducement equity awards, may have an adverse effect on the market price of shares of our common stock.
Further, debt financing and preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends.
If we raise additional funds through government or other third-party funding, collaborations,licensing or OUS business development partnership agreements, strategic alliances licensing arrangements or marketing and distribution arrangements, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market products or product candidates that we would otherwise prefer to develop and market ourselves.
Our limited operating history may make it difficult for our stockholders to evaluate the success of our business to date and to assess our future viability.
We are an early-stage company. We were incorporated and commenced active operations in early 2008, and our operations to date have been limited to organizing and staffing our company, acquiring rights to intellectual property, business planning, raising capital, developing our technology, identifying potential product candidates, undertaking pre-clinical studies and conducting clinical trials. All of our product candidates which we are currently pursuing are still in clinical or pre-clinical development. We have not yet demonstrated our ability to successfully complete clinical development of any product candidate, obtain marketing approvals, manufacture at commercial scale, or arrange for a third party to do so on our behalf, or conduct sales, marketing and distribution activities necessary for successful product commercialization. Consequently, any predictions about our future success or viability may not be as accurate as they could be if we had a longer operating history.
In addition, as a new business, we may encounter unforeseen expenses, difficulties, complications, delays and other known and unknown factors. We will need to transition at some point from a company with a research and development focus to a company capable of supporting commercial activities. We may not be successful in such a transition.
We expect our financial condition and operating results to continue to fluctuate significantly from quarter-to-quarter and year-to-year due to a variety of factors, many of which are beyond our control. Accordingly, our stockholders should not rely upon the results of any quarterly or annual periods as indications of future operating performance.
Business disruptions could seriously harm our future revenues and financial condition and increase our costs and expenses.
Our operations could be subject to earthquakes, power shortages, telecommunications failures, water shortages, floods, hurricanes, typhoons, fires, extreme weather conditions, medical epidemics and other natural or man-made disasters or business interruptions. The occurrence of any of these business disruptions could seriously harm our operations and financial condition and increase our costs and expenses. The ultimate impact on us and our general infrastructure of being in certain geographical areas is unknown, but our operations and financial condition could suffer in the event of a fire or other natural disaster.
The anticipated benefits of the Viventia acquisition may not be fully realized and may take longer to realize than expected.
The Viventia acquisition involved the integration of Viventia’s operations, product candidates and technology with our existing operations and programs, and there are uncertainties inherent in such integration. We have devoted and will continue to devote significant management attention and resources to the Viventia integration and to the further development of Viventia's product candidates and other development programs. Delays, unexpected difficulties in the integration process or failure to retain key management personnel could adversely affect our business, financial results and financial condition. Even if we were able to conduct the integration successfully, we may not realize the full achievement of the benefits of the Viventia acquisition within a reasonable period of time.
In addition, we may have not yet discovered during the due diligence process all factors regarding Viventia that could produce unintended and unexpected consequences for us. Undiscovered factors could cause us to incur potentially material financial liabilities, and prevent us from achieving the expected benefits from the acquisition within our desired time frames, if at all.
Risks Related to the DiscoveryClinical Development and DevelopmentRegulatory Approval of Our Product Candidates

Vicineum
We are dependent on our lead product candidates, Vicinium and Proxinium.candidate, Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. If we are unable to obtain marketing approval for or successfully commercialize either of theseour lead product candidates,candidate, either alone or through a collaboration,an out-license or OUS business development partnership, or experience significant delays in doing so, our business could be materially harmed.
We currently have no products approved for sale and have invested a significant portion of our efforts and financial resources in the development of ViciniumVicineum. On August 13, 2021, we received a CRL from the FDA indicating that the FDA had determined that it could not approve the BLA for Vicineum for the treatment of patients with high-grade non-muscular invasive bladder cancer, orBCG-unresponsive NMIBC and of Proxiniumin its present form. On August 20, 2021, we withdrew our MAA to the EMA for Vysyneum for the treatment of patientsBCG-unresponsive NMIBC in order to pause
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our plans to pursue regulatory approval of Vysyneum in the European Union until there is more clarity from the FDA on next steps for Vicineum in the United States. In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with squamous cell carcinomathe FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the headrequirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
We may be unable to address the issues identified in the CRL from the FDA or resubmit a BLA for Vicineum, or address the concerns identified in the EMA Withdrawal Assessment Report or resubmit our MAA for Vysyneum, including because of a lack of capital or otherwise.
Even if the issues identified in the CRL or the concerns identified in the EMA Withdrawal Assessment Report are resolved to the satisfaction of the FDA or the EMA, respectively, the FDA and neck,the European Commission retain the right not to approve a BLA or SCCHN. MAA, respectively, or to require additional information, or to raise additional issues with regard to regulatory approval, which could further delay or prevent its approval or limit product labelling claims.
Our prospects are substantially dependent on our ability and the ability of our out-licensing and OUS business development partners to obtain marketing approval for and successfully commercialize Vicinium and Proxinium. The success of these two lead product candidates will depend, among other things, on our ability to design and successfully complete clinical trials for each product candidate. The clinical trial process is uncertain, and failure of one or more clinical trials can occur at any stage of testing. For example, in 2009, Viventia put its development of Vicinium on hold due to the uncertainty of the standard of care for bladder cancer, and in 2008, Viventia terminated its Phase 3 clinical trial of Proxinium due to enrollment and retention reasons that we believe were specific to emerging markets. While we plan to move both of these programs forward, and believe that we will not have enrollment and retention problems with our Phase 3 clinical trial for Vicinium and our Phase 2 clinical trial for Proxinium each in the United States and Canada, the general clinical development of product candidates involves a lengthy and expensive process with an uncertain outcome. We are also in the early stages of development of VB6-845d and EBI-031. We submitted an IND for EBI-031Vicineum for the treatment of diabetic macular edema,non-muscle invasive CIS of the bladder in patients previously treated with adequate or DME, and uveitis in June 2016, which received IND Clearance fromless than adequate BCG. In addition, either the substance of the issues identified by the FDA in the CRL, or the CRL itself, or the concerns identified in the EMA Withdrawal Assessment Report could have an adverse impact on July 7, 2016,future efforts to obtain marketing authorization for Vicineum from other non-US regulatory authorities, or on our future efforts to commercialize Vicineum and enables initiationgain acceptance of clinical development of this product candidate.We subsequently licensed EBI-031 pursuant to the License Agreement with Roche, who will now be responsible for the development and potential commercialization of EBI-031.
In addition to the successful completion of clinical trials, theVicineum from third party payors. The success of Vicinium, Proxinium, VB6-845d and EBI-031Vicineum will also depend on several other factors, including the following:
receiptsuccessfully completing the clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
addressing the issues identified in the CRL we received from the FDA and the concerns identified in the EMA Withdrawal Assessment Report;
receiving marketing approvals from the FDA, Health Canada, the European Commission or comparable foreignnon-US regulatory authorities;authorities, including our ability to address the issues identified by the FDA in the CRL or the EMA Withdrawal Assessment Report;
developing and maintaining the commercial manufacturing supply and distribution chain for Vicineum;
performance of our current and future collaborators, if any;out-licensing or OUS business development partners;
the extent of any required post-marketing approval commitments to applicable regulatory authorities;
obtaining and maintaining patent, trade secret protection and regulatory exclusivity, both in the United States and internationally;
protection ofprotecting our rights in our intellectual property portfolio;
launch oflaunching commercial sales, if and when marketing approval is received;
demonstration ofdemonstrating an acceptable safety profile prior to and following any marketing approval;
obtaining marketplace acceptance, if and when approved, by patients, the medical community and third-party payors;
establishing and maintaining pricing sufficient to realize a meaningful return on our investment; and
competition with other therapies.
If we (or, in the case of EBI-031, Roche)or our OUS business development partners are unable to develop, receive marketing approval for, or successfully commercialize Vicinium, Proxinium, VB6-845d or EBI-031,Vicineum or experience delays as a result of any of these factors or otherwise, our business could be materially harmed.
If additional clinical trials of any product candidate that we developVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG fail to demonstrate quality, safety and efficacy to the satisfaction of the FDA, Health Canada, the EMA or other non-US regulatory authorities or do not otherwise produce favorable results, we may incur additional costs or experience delays in completing, or ultimatelywill be delayed or unable to complete the development and potential commercialization of any product candidate.Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
Before obtaining marketing approval from regulatory authorities for the sale of any product candidate,Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, we must complete pre-clinical development and then conduct extensive clinical trials to demonstrate the quality, safety and efficacy of our product candidatesVicineum in humans.humans. In order to address the issues identified in the CRL we received from the FDA for the BLA for Vicineum and the concerns
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identified in the EMA Withdrawal Assessment Report, we will need to complete one or more additional clinical trials. Such trials will require us to incur substantial additional costs and will delay the potential commercialization of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. Clinical testing is expensive, difficult to design and implement, can take many years to complete and is uncertain as to outcome.outcome. A failure of one or more clinical trials can occur at any stage of testing. Thetesting. Further, the outcome of pre-clinical testingstudies and early clinical trials may not be predictive of the success of later clinical trials, and interimpreliminary results of a clinical trial do not necessarily predict final results.
Even if such clinical trials are successfully completed as planned, the results. Moreover, pre-clinical may not support approval of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG under the laws and regulations of the FDA, the European Commission or comparable non-US regulatory authorities. We cannot be certain that additional clinical data will demonstrate Vicineum is both safe and effective for its intended uses to the satisfaction of the FDA, the EMA or comparable non-US regulatory authorities. Pre-clinical and clinical data and analyses are often susceptibleable to varying interpretationsbe interpreted in different ways. Even if we view our results favorably, we may be unable to demonstrate safety and analyses, and many companies that have believed their product candidates performed satisfactorilyefficacy of Vicineum for the treatment of non-muscle invasive CIS of the bladder in pre-clinical studies and clinical trials have nonetheless failedpatients previously treated with adequate or less than adequate BCG to the satisfaction of the FDA, the EMA or other non-US regulatory authorities. If a regulatory authority has a different view, we may still fail to obtain marketingregulatory approval of their product candidates. For example,Vicineum. This, in January 2016, we announced top-line resultsturn, would prevent us from commercializing Vicineum and our Phase 3 clinical trial of isunakinraability to generate revenues in patients with severe allergic conjunctivitis.the future would be materially impaired.

In this trial, there was no statistically significant difference between the isunakinra treated group and the vehicle control group on the primary endpoint of ocular itching or on any secondary endpoints.
Many compounds that initially showed promise in early-stage testing for treating cancer have later been found to not be effective treatments or to cause side effects that prevented further development of the compound. The therapeutic efficacy and safety profiles of our product candidates have not been demonstrated in humans, and weWe may not be able to successfully develop and commercialize our product candidates.
Our product candidates are novel and their potential benefita more sensitive bioanalytical assay which is unproven. Our ability to generate revenues from our product candidates, which we do not expect will occur in the short term, if ever, will depend heavily on the successful development, approval and commercialization, if achieved, of one or more of our product candidates. For example, our product candidates may not prove to be effective treatmentsneeded for the cancer targets they are being designed to act against and may not demonstrate inadditional Phase 3 clinical trial subjects any or all of the pharmacological data points that may have been demonstrated in pre-clinical studies and previous clinical trials. Our product candidates may interact with human biological systems in unforeseen, ineffective or harmful ways. If our product candidates are associated with undesirable side effects or have characteristics that are unexpected, we may need to abandon their development or limit development to certain uses or subpopulations in which the undesirable side effects or other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. Many compounds that initially showed promise in early-stage testing for treating cancer have later been found to not be effective treatments or may cause side effects that prevented further development of the compound. As a result of these and other risks described herein that are inherent in the development of novel therapeutic agents, we may never successfully develop, enter into or maintain third party licensing or collaboration transactions with respect to, or successfully commercialize our product candidates, in which case we will not achieve profitability and the value of our shares of common stock may decline.
We may expend our limited resources to pursue development of a particular product candidate or indication and fail to capitalize on product candidates or indications that have a greater likelihood of clinical success or commercial potential.
Because we have limited financial and managerial resources, we focus on research programs and product candidates that we identify for specific indications. As a result, we may forego or delay pursuit of opportunities with other product candidates or for other indications that later prove to have greater likelihood of clinical success or commercial potential. For example, we previously invested a significant portion of our efforts and financial resources in the development of isunakinra Vicineumfor the treatment of non-muscle invasive CIS of the bladder in patients previously treated with dry eye disease and allergic conjunctivitis. Notwithstanding this significant investment, based onadequate or less than adequate BCG.
We will need to develop a more sensitive bioanalyticalassay for the results from our completedadditional Phase 3 clinical trialstrial for Vicineum for the treatment of non-muscle invasive CIS of the bladder in dry eye disease and allergic conjunctivitis, we dopatients previously treated with adequate or less than adequate BCG than was used in our prior VISTA Trial for Vicineum. This bioanalyticalassay will be used to measure levels of Vicineum in the blood. The development of a new bioanalyticalassay for a novel biologic like Vicineum can be complex. There is risk that an adequately sensitive bioanalyticalassay may not plan to pursuebe scientifically or economically feasible or that any new bioanalyticalassay developed by us or a third party will not be accepted by the FDA or other comparable regulatory bodies. As a result, further development of isunakinra.
Our resource allocation decisionsVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG may cause us to fail to capitalize on viable commercial productsbe negatively impacted or profitable market opportunities. Our spending on research and development programs and product candidates for specific indications may not yield any commercially viable products. In addition, if we do not accurately evaluate the commercial potential or target market for a particular product candidate, we may relinquish valuable rights to that product candidate through collaboration, licensing or other royalty arrangements in cases indelayed, which it would have been more advantageous for us to retain sole development and commercialization rights to such product candidate.an adverse impact on our business.
If we experience any of a number of possible unforeseen events in connection with our clinical trials, potential marketing approval or commercialization of our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG could be delayed or prevented.
We may experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent our ability to receive marketing approval or commercialize any product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG that we may develop, including:
clinical trials of our product candidatesVicineum may produce negative or inconclusive results, and we may decide, or regulators may require us, to conduct additional clinical trials or abandon productthe development programs;of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
the number of subjects required for clinical trials of our product candidates may be larger than we anticipate, enrollment in these clinical trials may be slower or more challenging than we anticipate, or subjectspatients may drop out of these clinical trials at a higher rate than we anticipate;
our third-party contractors may fail to comply with regulatory requirements, including GCPsGCP or meet their contractual obligations to us in a timely manner, or at all;
inspection of the clinical trial operations, trial sites or manufacturing facilityfacilities by the FDA or other comparable foreignnon-US regulatory authorities such as Health Canada, or the competent authorities of the E.U. Member States, could result in findings of non-compliance and the imposition of a clinical suspension or termination;

regulators or institutional review boardsIRBs/Ethics Committees may delay or not authorize us or our investigators to commence a clinical trial or conduct a clinical trial at a prospective trial site;
we may experience delays or fail to reach agreement with the FDA or a comparable foreignnon-US regulatory authority including Health Canada, or the competent authorities of the E.U. Member States, on a trial design that we are able to execute;
we may be unable to identify and maintain a sufficient number of trial sites, many of which may already be engaged in other clinical trial programs, including for the same indications as our clinical trials;
we may experience delays in reaching, or fail to reach, agreement on acceptable clinical trial contracts or clinical trial protocols with prospective trial sites;
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trial sites and investigators may deviate from clinical trial protocols or otherwise fail to conduct the trial in accordance with regulatory requirements, and investigators may drop out of the clinical trial;
trial sites may withdraw from our clinical trials, including as a result of changing standards of care or ineligibility of a site to participate in our clinical trials;
we may decide, or regulators or institutional review boards/IRBs/Ethics Committees or other reviewing entities, including comparable foreignnon-US regulatory authorities, such as Health Canada, or the competent authorities of the E.U. Member States, may require us to suspend or terminate clinical research for various reasons, including noncompliance with regulatory requirements including GCPsGCP or a finding that the subjectspatients are being exposed to unacceptable health risks;
the cost of clinical trials of our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG may be greater than we anticipate;
we may receive feedback from DSMBs or the FDA, DSMBs, or a comparable foreignnon-US regulatory authority, including Health Canada, or the competent authorities of the E.U. Member States, that might require modification to the protocol for the clinical trial or performance of additional studies before clinical trials may continue;
as a clinical trial proceeds, or as the results of earlier stage studies or concurrent studies become available, we may determine that we need to modify the protocol and/or other aspects of the clinical trial before it may continue;
the FDA, a comparable foreignnon-US regulatory authority, including Health Canada, or the competent authorities of the E.U. Member States, or we may decide to, or a DSMB may recommend to, suspend or terminate clinical trials at any time for safety issues or for any other reason;
the supply or quality of our product candidatesVicineum or other materials necessary to conduct clinical trials of our product candidatesVicineum may be insufficient or inadequate;
our product candidatesVicineum may have undesirable side effects or other unexpected characteristics, causing us or our investigators, regulators or institutional review boardsIRBs/Ethics Committees to suspend or terminate the trials;
lack of adequate funding to continue a clinical trial, including the incurrenceoccurrence of unforeseen costs due to enrollment delays, requirements to conduct additional clinical trials or increased expenses associated with the services of our CROs and other third parties; and
changes in applicable laws, governmental regulations or administrative actions.
We rely on CROs and clinical trial sites to ensure the proper and timely conduct of our clinical trials, and while we have agreements governing their activities, we have limited influencecontrol over their actual performance. Any delays in completing our clinical trials will increase our costs, slow down our development and regulatory submission process for our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and jeopardize our ability to obtain regulatory approval, commence commercial sales and generate revenues, if our product candidates areVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG is ultimately approved.
Further, conducting clinical trials in foreign countries,outside of the United States, as we have done historically for ViciniumVicineum (both for the treatment of BCG-unresponsive NMIBC and Proxiniumfor the treatment of SCCHN) and as we may decide to do in the future, presents additional risks that may delay completion of our clinical trials. These risks include the failure of enrolled subjectspatients in foreign countries outside of the United States to adhere to clinical protocol as a result of differences in healthcare services or cultural customs, managing additional administrative burdens associated with foreignnon-US regulatory schemes,frameworks, as well as political and economic risks relevant to such foreign countries.
If we are required to conduct additional clinical trials or other testing of our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG beyond those that we currently contemplate, if we are unable to successfully complete clinical trials of our product candidatesVicineum or other testing, if the results of these trials or tests are not favorable or are only modestly favorable or if there are safety concerns, we may:

be delayed in obtaining marketing approval for our product candidates;Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
not obtain marketing approval at all;
obtain approval for indications or patient populations that are not as broad as intended or desired;
obtain approval with labeling that includes significant use or distribution restrictions or safety warnings, or is subject to a REMS;
be subject to additional post-marketing testing requirements; or
have the productVicineum removed from the market after obtaining marketing approval.
Our product development costs will also increase if we experience delays in testing or marketing approvals. We do not know whether any of our pre-clinical studies or clinical trials will begin as planned, will need to be restructured or will be completed
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on schedule, or at all. Significant pre-clinical or clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG or allow our competitors to bring products to market before we do and impair our ability to successfully commercialize our product candidates.Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
If we experience delays or difficulties in the enrollment of subjectspatients in clinical trials, our receipt of necessary regulatory approvals could be delayed or prevented.
We may not be able to initiate or continue clinical trials for our product candidates if we are unable to locate and enroll a sufficient number of subjectspatients to participate in these trials as required by the FDA or similar non-US regulatory authorities outside the United States, including Health Canada or the EMA.authorities. We have previously experienced difficulties with clinical trial enrollment and retention, which led to the early termination of our Phase 3 trial of ProxiniumVicineum for the treatment of SCCHN in 2008, and we may experience difficulties in subjectpatient enrollment in our clinical trials in the future for a variety of reasons.
Subject enrollment is affected by a number of factors, including:
the severity of the disease under investigation;
the eligibility criteria for the clinical trial in question;
the size of the patient population for the disease;
the size of the subjectpatient population required for statistically significant analysis of the clinical trial’s primary endpoints;
the design of the clinical trial;
the clinicians' and subjects'patients' perceived risks and benefits of the product candidate under study, including relative to alternative treatments;
the efforts to facilitate timely enrollment in clinical trials;
the subjectpatient referral practices of physicians;
any ongoing clinical trials conducted by competitors for the same indication;
the risk that subjectspatients enrolled in clinical trials will drop out of the clinical trials before completion;
the ability to monitor subjectspatients adequately during and after treatment; and
the proximity and availability of clinical trial sites for prospective subjects.patients.
Further, our ability to successfully initiate, enroll and complete a clinical trial in any foreign country outside of the United States, should we decide to do so, is subject to numerous risks unique to conducting business in foreignsuch countries, including:
difficulty in establishing or managing relationships with CROs and physicians;
different or additional standards for the conduct of clinical trials;
absence in some countries of established groups with sufficient regulatory expertise for review of the protocols associated with our product candidates;
ensuring that clinical trial quality is sufficient to meet the standards of the FDA or other regulatory authorities;
our inability to locate qualified local consultants, physicians and partners; and

the potential burden of complying with a variety of foreignnon-US laws, medical standards and regulatory requirements, including the regulation of pharmaceutical and biotechnology products and treatments.
In addition, our clinical trials will compete with other clinical trials for other product candidates that are in the same therapeutic areas as our product candidates, and this competition will reduce the number and types of subjectspatients available to us, because some subjectspatients who might have opted to enroll in our trials may instead opt to enroll in a trial being conducted by one of our competitors. Since the number of qualified clinical investigators is limited, we expect to conduct some of our clinical trials at the same clinical trial sites that some of our competitors use, which will reduce the number of subjectspatients who are available for our clinical trials in such clinical trial site. Moreover, because our product candidates represent a departure from more commonly used methods for cancer treatment, potential subjectspatients and their doctors may be inclined to use conventional therapies, such as chemotherapy, rather than enroll subjectspatients in any of our clinical trials.
Our inability to enroll a sufficient number of subjectspatients for our clinical trials would result in significant delays, could require us to abandon one or more clinical trials altogether and could delay or prevent our receipt of necessary regulatory approvals. Enrollment delays in our clinical trials may result in increased development costs for our product candidates, which would cause the value of our company to decline and limit our ability to obtain additional financing.
Current shortages of BCG, coupled with the cessation of BCG production by one of two manufacturers in the United States and Canada, could inhibit or delay our ability to complete enrollment of our Vicinium Phase 3 clinical trials.
We, through our recently acquired subsidiary Viventia, have commenced an open-label, non-randomized Phase 3 clinical trial of Vicinium in subjects with high-grade NMIBC who have received at least two courses of full-dose BCG, and whose disease is now BCG-unresponsive, in the third quarter of 2015 in the United States and Canada. To qualify as eligible for participation in this clinical trial, subjects must have received adequate BCG treatment defined as at least two courses of full-dose BCG, i.e., at least one induction and one maintenance course or at least two induction courses. The initial induction course must be at least five treatments within a seven week period. The second course (induction or maintenance) must be at least two treatments within a six week period. The “5+2” doses of BCG must be given within approximately 12 months andVicineum for the same disease episode for whichtreatment of non-muscle invasive CIS of the subject is enrolling. Treatment must be considered full-dose BCG. Subjects who were unable to receive at least five doses of BCGbladder in a first course and at least two doses of BCG in a second course due to intolerance are not eligible. Subjects who receivedpatients previously treated with adequate or less than full doseadequate BCG (e.g., 1/2 or 1/3 dosing) as a standard regimen and not due to dose reductions because of AEs are not eligible.
In 2015, we encountered disruptions in our ability to enroll eligible subjects in our Phase 3 clinical trial of Vicinium due to a temporary shortage of BCG, which led to some physicians rationing their supply of BCG and failing to administer the full dose through their patients’ BCG treatment. This temporary shortage was rectified in 2016. In November 2016, Sanofi Pasteur, or Sanofi, one of the two manufacturers of BCG in the United States and Canada, announced that its production of its BCG product would cease in mid-2017. If Merck, the other manufacturer of BCG in the United States and Canada, is unable to increase its production of its BCG product to counterbalance the loss of Sanofi’s BCG product, there may be a shortage of BCG, which could inhibit, delay or prevent our ability to complete enrollment of our Phase 3 clinical trial.
Our product candidates may cause undesirable side effects, serious adverse events or have other properties that could delay or
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halt clinical trials, delay or prevent theirits regulatory approval, limit the commercial profile of theirits labeling, if approved, or result in significant negative consequences following any marketing approval.
Undesirable side effects or serious adverse events caused by our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG could cause us or regulatory authorities to interrupt, delay or halt respective clinical trials and could result in a restrictive label or the delay or denial of regulatory approval by the FDA or other comparable foreignnon-US regulatory authorities, including Health Canada or the European Commission. For example, even though each of our product candidates that have been administered to humans in earlier-stage clinical trials have generally been well-tolerated by subjects, in some cases there were side effects and serious adverse events, some of which were severe.
High-grade NMIBC (Vicinium)authorities.
There were no Grade 4 or Grade 5 serious adverse events that were considered by the clinical investigatorinvestigators to be related to ViciniumVicineum during the Phase 1 and Phase 2 clinical trials. However, theretrials of Vicineum for the treatment of NMIBC. There was one Grade 5 serious adverse event, or death, which was determined by the clinical investigator to be unrelated to Vicinium.Vicineum. The most common reported treatment-related adverse events were an abnormally frequent passage of small amounts of urine, blood in the urine and painful urination, the majority of which were considered to be mild or moderate in severity. No subjectspatients discontinued treatment due to a Vicinium-relatedVicineum-related adverse event during the Phase 1 and Phase 2 clinical trials.

SCCHN (Proxinium)
There were no Grade 5 seriousAs of the May 29, 2019 data cutoff date, in patients across all cohorts (n=133) of our Phase 3 VISTA Trial of Vicineum for the treatment of BCG-unresponsive NMIBC, 88% experienced at least one adverse event, with 95% of adverse events thatbeing Grade 1 or 2. The most commonly reported treatment-related adverse events were considereddysuria (14%), hematuria (13%) and urinary tract infection (12%) - all of which are consistent with the profile of bladder cancer patients and the use of catheterization for treatment delivery. These adverse events were determined by the clinical investigatorinvestigators to be related to Proxinium during the Phase 1, Phase 2 or Phase 3 clinical trials. The Grade 3manageable and Grade 4 serious adverse events that were reported in the clinical trials of Proxiniumreversible, and were considered to be possibly, probably or definitely related to treatment consisted of abnormal tumor growth, anorexia, cancer pain, decrease in red blood cells, difficulty swallowing, elevated calcium levels, facial pain, fatigue, high blood sugar, influenza-like illness, injection site pain, liver function abnormalities, low albumin level, low sodium concentration, nausea, rash, swelling, tumor hemorrhage and tumor necrosis. Seven subjects died during the clinical trials of Proxinium, but none of the deaths were deemed to be related to Proxinium. Eleven subjectsonly four patients (3%) discontinued treatment due to liver function test abnormalities; however, the serum levelsan adverse event. Serious adverse events, regardless of treatment attribution, were transientreported in 14% of patients. There were four treatment-related serious adverse events reported in three patients including acute kidney injury (Grade 3), pyrexia (Grade 2), cholestatic hepatitis (Grade 4) and they eventually returned to baseline without any evidence of permanent liver damage. Four subjects withdrew from the clinical trials. Three of the four subjects withdrew at their request and one of the four subjects withdrew at the request of the investigator.
Multiple types of EpCAM-positive solid tumors (VB6-845d)
renal failure (Grade 5 or death). There were no Grade 5 seriousage-related increases in adverse events that were considered byobserved in the clinical investigator to be related to VB6-845, which is the prior version of VB6-845d, during the Phase 1 clinical trial. The Grade 3 and Grade 4 serious adverse events that were considered to be possibly, probably or definitely related to treatment consisted of an infusion related reaction and an infusion site reaction.VISTA Trial.
As a result of theseIn addition, side effects and serious adverse events or further safety or toxicity issues that we may experience in our clinical trials or in post-marketing experience, if approved, could lead to the future, we may not receiveFDA's or other comparable non-US regulatory approval for anyauthority's imposition of our product candidates or we may receive approval subject to restrictive label requirements,a REMS or other post-marketing obligations, which could preventhinder us from ever generating revenues or achieving profitability. Results of our clinical trials could reveal an unacceptably high severity and prevalence of side effects or serious adverse events. In such an event,As a result, our clinical trials could be suspended or terminated, and the FDA or comparable foreignnon-US regulatory authorities including Health Canada, the EMA and the European Commission, could order us to cease further development or deny approval of anyVicineum for the treatment of our product candidates for anynon-muscle invasive CIS of the bladder in patients previously treated with adequate or all targeted indications.less than adequate BCG. The clinical trial drug-related siderelated drug-side effects or serious adverse events in our clinical trials could affect clinical trial subjectpatient recruitment or the ability of enrolled subjectspatients to complete the clinical trial or result in potential product liability claims.
We have no clinical safety data on human exposure to VB6-845d or anyAdditionally, if Vicineum for the treatment of our other pre-clinical product candidates. Many compounds that initially showed promise in clinical or early stage testing for treating cancers have later been found to cause side effects that prevented further developmentnon-muscle invasive CIS of the compound.
Additionally, if our product candidates receivebladder in patients previously treated with adequate or less than adequate BCG receives marketing approval, and we or others later identify undesirable side effects or serious adverse events caused by our product candidates,Vicineum, a number of potentially significant negative consequences could result, including:
we may suspend or be forced to suspend marketing of our product candidates;Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
we may be obliged to conduct a product recall or product withdrawal;
regulatory authorities may suspend, vary, or withdraw their approvals of our product candidates;Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
regulatory authorities may order the seizure or recall of our product candidates;Vicineum;
regulatory authorities may require additional warnings on the label or a REMS or other post-marketing obligations that could diminish the usage or otherwise limit the commercial success of our product candidates;Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
we may be required to conduct post-marketing studies;
we could be sued and held liable for harm caused to subjects or patients;
we could be required to pay fines and face other administrative, civil and criminal penalties; and
our reputation may suffer.
Any of these events could prevent us from achieving or maintaining market acceptance of our product candidates, if approved.
We recently identified a potential issue regarding the sensitivity of an assay we employed in our Vicinium clinical trials.  The FDA could take a number of actions in response to this issue, which could have a material adverse effect on our business.

In our Phase 3 clinical trials of ViciniumVicineum for the treatment of subjects with NMIBC, we have and are generating pharmacokinetic data. We recently identified a potential issue regarding the sensitivitynon-muscle invasive CIS of the assay we employed. We used the same assaybladder in the Phase 1 clinical trial for Vicinium.  We did not evaluate pharmacokinetics in the Phase 2 clinical trial for Vicinium.  We notified the FDA of this issue and are working to develop an appropriate action plan to address this issue.  We are closely monitoring the subjects enrolled in our ongoing Phase 3 clinical trial of Vicinium and we do not believe that subjects in this clinical trial are exposed to any additional material risk due to the issue surrounding the assay. The FDA could take a number of actions in response to this issue, including requiring us to modify the protocol for our Phase 3 clinical trial, insisting on additional subject monitoring, placing our Phase 3 clinical trial on partialpatients previously treated with adequate or full clinical hold, which any such actions could have a material adverse effect on our business.less than adequate BCG, if approved.
We will need to obtain FDAregulatory authority approval of any proposed names for our product candidates,oportuzumab monatox for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and any failure or delay associated with such naming approval may adversely impact our business.
We have not yet submitted
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Although the FDA previously conditionally accepted the name Vicineum, and EMA previously conditionally accepted the name Vysyneum, for our proposed proprietary names, Viciniumproduct candidate, oportuzumab monatox, these approvals are subject to further and Proxinium, tofinal review by FDA and EMA upon potential resubmission of our respective applications and at the time of regulatory authority review of such applications. If the FDA or any foreign regulatory authority, including Health Canada or the European Commission, for provisional approval. Any proprietary name we propose to use with our product candidates in the United States must be approved by the FDA, regardless of whether we have registered it, or applied to register it, as a trademark. The FDA reviews any proposed product name, including an evaluation of potential for confusion with other product names. The FDA may alsoEMA object to a product name if it believes the name inappropriately implies medical claims or contributes to an overstatement of efficacy. If the FDA objects to any proposed proprietary product name, we may be required to expend significant additional resources in an effort to identify a suitable proprietary product name that would qualify under applicable laws, not infringe the existing rights of third parties and be acceptable to the FDA.FDA and EMA, as applicable.
The marketing approval process is expensive, time-consuming and uncertain. As a result, we cannot predict when or if we, or any licensees or partners, will obtain marketing approval to commercialize Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG or any other product candidate.
Securing marketing approval requires the submission of extensive pre-clinical and clinical data and supporting information to regulatory authorities for each therapeutic indication to establish the product candidate’s quality, safety, and efficacy. The process of obtaining marketing approvals, both in the United States and abroad, is expensive and may take many years, especially if additional clinical trials are required, if approval is obtained at all. In October and December 2021, we participated in a CMC Type A Meeting and Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. We may applyhave a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
Securing marketing approval also requires the submission of information about the product manufacturing process to, and could possibly obtain provisional approvalinspection of our proprietary namesmanufacturing facilities by, the regulatory authorities. The FDA prioror other comparable non-US regulatory authorities may determine that any product candidate that we may develop is not safe, effective or of appropriate quality, is only moderately effective or has undesirable or unintended side effects, toxicities or other characteristics that preclude our obtaining marketing approval or prevent or limit commercial use. Any marketing approval we ultimately obtain may be limited or subject to submissionrestrictions or post-approval commitments that render the approved product not commercially viable.
The different requirements and expectations of our BLAs. However, this approval is conditional upon a further and final review bythe non-US regulatory authorities compared with the FDA atmay lengthen the time of BLA review.
We may attempt to secure approval from the FDA or comparable non-U.S. regulatory authorities through the use of accelerated registration pathways. If unable to obtain approval under an accelerated pathway, we may be requiredreview process, require us to conduct additional pre-clinical studies or clinical trials, beyond those that we contemplate, which could increase the expense of obtaining,our development costs, lead to changes in regulatory positions and delay the receipt of, necessary marketing approvals. Even if we receive accelerated approval from the FDA, if our confirmatory trials do not verify clinical benefit, or if we do not comply with rigorous post-marketing requirements, the FDA may seek to withdraw accelerated approval.
We may seek an accelerated approval development pathway for certain indications for our product candidates, including Vicinium in BCG refractory high-grade NMIBC. Under the accelerated approval provisions in the FDCA and the FDA’s implementing regulations, the FDA may grant accelerated approval to a product designed to treat a serious or life-threatening condition that provides meaningful therapeutic advantage over available therapies and demonstrates an effect on a surrogate endpoint or intermediate clinical endpoint that is reasonably likely to predict clinical benefit. The FDA considers a clinical benefit to be a positive therapeutic effect that is clinically meaningful in the context of a given disease. For the purposes of accelerated approval, a surrogate endpoint is a marker, such as a laboratory measurement, radiographic image, physical sign, or other measure that is thought to predict clinical benefit, but is not itself a measure of clinical benefit. An intermediate clinical endpoint is a clinical endpoint that can be measured earlier than an effect on irreversible morbidity or mortality that is reasonably likely to predict an effect on irreversible morbidity or mortality or other clinical benefit.
If we choose to pursue accelerated approval, we intend to seek feedback from the FDA or will otherwise evaluate our ability to seek and receive such accelerated approval. There can be no assurance that the FDA will agree that our proposed primary endpoint of a pivotal study is an appropriate surrogate endpoint. There also can be no assurance that, after our evaluation of the feedback from the FDA or other factors, we will decide to pursue or submit a BLA for accelerated approval or any other form of expedited development, review or approval. Furthermore, if we submit an application for accelerated approval, there can be no assurance that such application will be accepted or that approval will be granted on a timely basis, or at all. For example, if another company receives full approval from the FDA to market a product for treatment of BCG refractory high-grade NMIBC, our ability to seek and obtain accelerated approval for Vicinium in the same indication may be materially adversely affected. The FDA or foreign regulatory authorities also could require us to conduct further studies prior to considering our application or granting approval of any type. We might not be able to fulfill the FDA’s requirements in a timely manner, which would cause delays, or approval might not be granted because our submission is deemed incomplete by the FDA. A failure to obtain accelerated approval or any other form of expedited development, review or approval for a product candidate would result in a longer time period to commercialize such product candidate, could increase the cost of development of such product candidate and could harm our competitive position in the marketplace.
Moreover, even if we receive accelerated approval from the FDA, we will be subject to rigorous post-marketing requirements, including the completion of confirmatory post-market clinical trial(s) to verify the clinical benefit of the product, and

submission to the FDA of all promotional materials 30-120 days prior to their dissemination. The FDA could seek to withdraw accelerated approval for multiple reasons, including if we fail to conduct any required post-market study with due diligence, a post-market study does not confirm the predicted clinical benefit, other evidence shows that the product is not safe or effective under the conditions of use, or we disseminate promotional materials that are found by the FDA to be false and misleading.
Failure to successfully validate, develop and obtain regulatory approval for companion diagnostics for our product candidates could impede development and commercialization.
We have developed a companion diagnostic for use with Proxinium. The FDA and comparable foreign regulatory authorities, including Health Canada, will require the development and regulatory approval or CE marking of a companion diagnostic as a condition to approving Proxinium. Companion diagnostics developed in conjunction with clinical programs for the associated product candidates are subject to regulation by the FDA and comparable foreign regulatory authorities, including Health Canada or the European Commission, as medical devices, and require separate approval or the affixing of a CE mark prior to their commercialization. Each regulatory body that approves a product candidate will independently need to review and/or approve the companion diagnostic before or concurrently with its approval of the product candidate, and before a product can be commercialized. During a Type C meeting with the FDA in 2007, the FDA noted that approval of a companion diagnostic for epithelial cell adhesion molecule, or EpCAM, expression would need to coincide with Proxinium approval. We intend to clarify whether the FDA still believes that a companion diagnostic is necessary to receive approval. The FDA may still require that a companion diagnostic for EpCAM expression be approved before or at the time of Proxinium approval. We and any potential future third-party collaborators may encounter difficulties in developing and obtaining approval for or affixing a CE mark to any companion diagnostic. Any delay or failure by us or our future third-party collaborators to develop or obtain regulatory approval or CE mark for a companion diagnostic couldinterpretations, delay or prevent approval and commercialization of Proxinium,these product candidates or limit the commercial opportunity for Proxinium. We may also have difficulty achieving adoption of Proxinium if the companion diagnostic is not commercially availablelead to significant post approval limitations or is restricted in its use by payors or other market forces. We could also incur additional expense if the FDA or comparable regulatory authorities, including Health Canada, determine that further studies are required before our companion diagnostic may be approved. Even if approved or CE marked,restrictions. If we may experience delays in developing a sustainable, reproducible and scalable manufacturing process or transferring that process to commercial partners for production, all of which may prevent us from commercializing our product candidates on a timely or profitable basis, if at all. Additionally, we or our collaborators may encounter production difficulties that could constrain the supply of the companion diagnostics, affect the ease of use, affect the price or have difficulties gaining acceptance of the use of the companion diagnostics in the clinical community. If the companion diagnostic for use with Proxinium fails to gain market acceptance, our ability to derive revenues from sales of Proxinium, if approved, could be harmed.
Because we plan to produce commercial supply of our product candidate Vicinium, if approved, through a third-party manufacturer, the FDA or foreignobtaining regulatory authorities may require us to demonstrate that the product manufactured by our third-party manufacturer is comparable in quality, safety, and efficacy to the product that was used in our clinical trials. If we experience challenges in demonstrating comparability, or if the FDA or foreign regulatory authorities require additional nonclinical or clinical studies to demonstrate comparability, the approval and/or commercialization of Vicinium could be delayed, adversely affected or terminated, or may result in significantly higher costs.
Our product candidate, Vicinium, has been produced in our own manufacturing facility for all clinical trials for Vicinium to date, and we also intend to utilize our own manufacturing facility to supply product for our ongoing Phase 3 clinical trial of Vicinium. We intend to utilize a third-party manufacturer to produceapprovals, the commercial supply of Vicinium, if approved, and plan to enter into discussions with the FDA and foreign regulatory authorities regarding the criteria for demonstrating comparability of Vicinium produced by our third-party manufacturer to Vicinium produced in our own manufacturing facility. Because this manufacturing change is being introduced at an advanced stage of development of Vicinium, the FDA and foreign regulatory authorities may require a comprehensive comparability assessment, potentially including additional nonclinical studies or clinical trials utilizing Vicinium produced by our third-party manufacturer, and/or a modification of our ongoing Phase 3 clinical trial to include Vicinium produced by our third-party manufacturer. Such requirements could result in lengthy delays and significantly higher costs for the clinical development, filing of a BLA, and potential commercialization of Vicinium. If we are unable to demonstrate comparability of Vicinium produced in our own manufacturing to Vicinium produced by our third-party manufacturer, we may not be able to obtain approval of a BLA for Vicinium. If we are unable to effectively transfer our manufacturing process to our third-party manufacturer, we may be unable to continue the clinical development of or seek approval of Vicinium.
Risks Related to the Commercialization of Our Product Candidates

Our commercial success depends upon attaining significant market acceptance of our product candidates, if approved, among physicians, patients, third-party payors and the medical community.
Even if we obtain regulatory approval for our product candidates, our product candidates may not gain market acceptance among physicians, patients, third-party payors or the medical community. The product candidates that we are developing are based on our TPT platform, which is a new technology and therapeutic approach. Market participants with significant influence over acceptance of new treatments, such as physicians and third-party payors, may not adopt a product or treatment based on our TPT platform and technologies, and we may not be able to convince the medical community and third-party payors to accept and use, or to provide favorable reimbursement for, any product candidates developed by us or any future collaborators. Market acceptance of our product candidates, if we receive approval, depends on a number of factors, including:
the perceived quality, efficacy and safety of our product candidates;
clinical indications for which our product candidates are approved;
availability of alternative effective treatments for the disease indications of our product candidates are intended to treat and the relative risks, benefits and costs of those treatments;
acceptance by physicians, major operators of cancer clinics and patients of our product candidates as safe and effective treatments;
the success of our physician education programs;
potential and perceived advantages of our product candidates over alternative treatments;
safety of our product candidates seen in a broader patient group, including their use outside the approved indications should physicians choose to prescribe them for such uses;
prevalence and severity of any side effects;
any new or unexpected results from additional clinical trials or further analysis of clinical data of completed clinical trials by us or our competitors;
product labeling or patient information requirements imposed by the FDA or other foreign regulatory authorities, including Health Canada and the EMA;
timing of market introduction of our product candidates as well as competitive products;
the pricing of our treatments, particularly in relation to alternative treatments, and willingness and ability of patients to pay for our product candidates;
availability of coverage and adequate reimbursement and pricing by third-party payors and government authorities;
maintaining compliance with all applicable regulatory requirements;
relative convenience and ease of administration; and
effectiveness of our sales, marketing and distribution efforts and operations.
If our product candidates are approved but fail to achieve market acceptance among physicians, patients, third-party payors or the medical community, we may not be able to generate significant revenues, which would compromise our ability to become profitable.
The market opportunitiesprospects for our product candidates may be limitedharmed and our ability to those patients whogenerate revenues will be materially impaired.
Failure to obtain marketing approval in non-US jurisdictions would prevent our product candidates from being marketed abroad, and any approval we are ineligiblegranted for established therapies or for whom prior therapies have failed, and may be small.
Cancer therapies are sometimes characterized as first-line, second-line or third-line. When cancer is detected early enough, first-line therapy, usually chemotherapy, hormone therapy, surgery, radiotherapy or a combination of these, is sometimes adequate to cureour product candidates in the cancer or prolong life without a cure. Second-line and third-line therapies are administered to patients when prior therapy isUnited States would not effective. We expect to seek initialassure approval of Viciniumproduct candidates in non-US jurisdictions.
In order to market and sell any product candidate that we may develop outside of the United States, we or our third-party licensees or commercialization partners must obtain separate marketing approvals and comply with numerous and varying regulatory requirements. The approval procedure varies among countries and can involve additional testing. The time required to obtain approval may differ substantially from that required to obtain FDA approval. The regulatory approval process outside the United States generally includes all of the risks associated with obtaining FDA approval. In addition, in many countries outside the United States it is required that the product be approved for reimbursement before the product can be sold in that country. We or these third parties may not obtain approvals from regulatory authorities outside the United States on a timely basis, if at all. For example, on March 5, 2021, we submitted our MAA to the EMA for Vicineum for the treatment of high-gradeBCG-unresponsive NMIBC after prior therapies have failed and approvalunder the EMA’s centralized procedure. On August 20, 2021, we withdrew our MAA to the EMA for ProxiniumVysyneum for the treatment of late-stage SCCHN. Subsequently, for those product candidates that proveBCG-unresponsive NMIBC. We have decided to be sufficiently beneficial, if any, we would expectpause our plans to seekpursue regulatory approval potentially earlierof Vysyneum in the treatment paradigm, butEuropean Union until there is no guarantee thatmore clarity from the FDA on the next steps for Vicineum in the United States. Additionally, on October 20, 2021, the EMA issued its Withdrawal Assessment Report relating to our MAA for Vysyneum, as is consistent with the EMA’s standard practice when an MAA is withdrawn. The Assessment Report reflects the initial assessment and corresponding questions from the EMA and identifies major objections in the areas of quality, good clinical practice, efficacy and safety. Approval by the FDA does not ensure approval by regulatory authorities in other countries or jurisdictions, and approval by one regulatory authority outside the United States does not ensure approval by regulatory authorities in other countries or jurisdictions or by the FDA. We may not be able to file for marketing approvals and may not receive necessary approvals to commercialize our products in any market. If we are unable to obtain approval of our product candidates even if approved, would be approved for first-line therapy, and, prior to any such approvals, we will have to conduct additional clinical trials.

Our projectionsby regulatory authorities in other jurisdictions, the commercial prospects of both the number of people who have the cancers we are targeting, as well as the subset of people with these cancers who have previously failed prior treatments, and who have the potential to benefit from treatment with our product candidates, are based on our beliefs and estimates. These estimates have been derived from a variety of sources, including scientific literature, surveys of clinics, patient foundations or market research, and may prove to be incorrect. Further, new studies may change the estimated incidence or prevalence of these cancers and the number of patients may turn out to be lower than expected. Additionally, the potentially addressable patient population for our product candidates may be limited or may not be amenable to treatment with our product candidates. Even if we receive regulatory approval for our product candidates and obtain significant market share, because the potential target populations are small, we may never achieve profitability without obtaining regulatory approval for additional indications, including the use of the products as first-line or second-line therapy.
Our commercial success could depend upon the continued marketing of another company’s approved product, or the approval of another company’s product candidate, that is administered with our product candidates.
Some of our future clinical trials and some of the indications for which we are developing our product candidates may involve the use of our product candidates in combination with other companies’ marketed products or product candidates. These marketed products or product candidates may be administered in a clinical trial in combination with one or more of our product candidates. In the event that any of these pharmaceutical companies has unforeseen issues that negatively impacts the clinical development, marketing approval or availability of its product or product candidate or otherwise opts to discontinue clinical development or marketing of its product or product candidate, our ability to complete our applicable clinical trials and/or evaluate clinical results for our product candidate in combination with the other company’s marketed product or product candidate may be negatively impacted. As a result, this could adversely affect our ability to file for, obtain, or maintain regulatory approval for our product candidate on a timely basis, or at all.
If we are unable to establish sales, marketing and distribution capabilities, we may not be successful in commercializing any of our product candidates, if and when they are approved.
We do not have a sales or marketing infrastructure and have no experience in the sale, marketing or distribution of therapeutic products. To achieve commercial success for any product for which we have obtained marketing approval, we will need to establish sales, marketing and distribution capabilities, either ourselves or through collaborations or other arrangements with third parties.
There are risks involved with establishing our own sales, marketing and distribution capabilities. For example, recruiting and training a sales force is expensive and time consuming and could delay any product launch. If the commercial launch of any product candidate for which we recruit a sales force and establish marketing capabilities is delayed or does not occur for any reason, we would have prematurely or unnecessarily incurred these commercialization expenses. This may be costly,significantly diminished, and our investment would be lost if we cannot retain or reposition our sales and marketing personnel.business prospects could decline.
Factors that may inhibit our efforts to commercialize any product candidates on our own include:
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our inability to recruit, train and retain adequate numbers of effective sales and marketing personnel;

the inability of sales personnel to obtain access to physicians or persuade adequate numbers of physicians to prescribe our products;
the lack of complementary products to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies with more extensive product lines; and
unforeseen costs and expenses associated with creating an independent sales and marketing organization.
We may enter into arrangements with third parties to perform sales, marketing and distribution services in markets outside the United States. We may also enter into arrangements with third parties to perform these services in the United States if we do not establish our own sales, marketing and distribution capabilities in the United States or if we determine that such third-party arrangements are otherwise beneficial. Our product revenues and our profitability, if any, under any such third-party sales, marketing or distribution arrangements are likely to be lower than if we were to market, sell and distribute any product candidates ourselves. In addition, we may not be successful in entering into arrangements with third parties to sell, market and distribute any product candidates or may be unable to do so on terms that are favorable to us. We likely will have little control over such third parties, and any of them may fail to devote the necessary resources and attention to sell and market our product candidates effectively. If we do not establish sales, marketing and distribution capabilities successfully, either on our own or in collaboration with third parties, we will not be successful in commercializing any product candidates for which we may obtain approval.

We face substantial competition, which may result in others discovering, developing or commercializing products before or more successfully than we do.
The development and commercialization of new biologics products is highly competitive. We face competition with respect to our product candidates and will face competitionVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with respect to any other product candidates that we may seek to developadequate or commercialize in the future,less than adequate BCG from both large and small pharmaceutical, biopharmaceutical and biotechnology companies, academic institutions and other research organizations; and particularly from companies, institutions and organizations that are actively researching, developing, or marketing products that attach proprietary cell-killing payloads to antibodies for targeted delivery to cancer cells.organizations. There are a number of large pharmaceutical, biopharmaceutical and biotechnology companies that currently market and sell products or are pursuing the development of products for the treatment of NMIBC. For instance, in January 2020, the respective disease indicationsFDA approved Merck & Co., Inc.'s Keytruda (pembrolizumab) as a systemic monotherapy to treat patients with BCG-unresponsive NMIBC with CIS with or without papillary tumors who are ineligible for which we areor have elected not to undergo cystectomy. In addition, FerGene Inc. is developing our product candidates. We believeAdstiladrin (nadofaragene firadenovec (rAd-IFN/Syn3) for BCG-unresponsive NMIBC for the United States market. On May 17, 2020, the FDA issued a CRL that indicated outstanding questions regarding CMC = issues of Adstiladrin. In September 2020, CG Oncology (CG0070, a significant number of products are currently under development, and may become commercially available in the future,recombinant adenovirus type 5, same type as Adstiladrin) initiated a Phase 3 study for the treatment of conditionsBCG-unresponsive patients with expected primary and study completion dates of December 2022 and December 2024, respectively. In December 2020, ImmunityBio (Anktiva/N-803 in combination with BCG) released preliminary Phase 2 data for the CIS cohort and is expected to file its BLA following a meeting with the FDA in the first quarter of 2022. However, the Phase 2 trial did not include a BCG only control arm. In May 2020, the preliminary results of the Phase 2 study of Tecentriq for the treatment of BCG-unresponsive CIS patients were presented at ASCO by the NCI (National Cancer Institute) which we aresponsored the trial. The data showed that the trial did not meet its primary endpoint and further development of Tecentriq remains uncertain. Finally, another route of administration for checkpoint inhibitors is currently developing, and may try to develop, product candidates.being evaluated by Pfizer with the subcutaneous administration of Sasanlimab (PF-06801591) for the treatment of BCG-unresponsive NMIBC patients. There is intense and rapidly evolving competition in the biotechnology, biopharmaceutical and antibody fragment and immuno-oncology therapeutics fields. Some of these competitive products and therapies are based on scientific approaches that are similar to our approach, and others are based on entirely different approaches. We are aware of several companies that are developing, or have developed cancer immunotherapies and antibody drug conjugates, or ADCs, and we are also aware of several companies developing product candidates that target the same cancer pathways that we are targeting or that are testing product candidates in the same cancer indications that we are testing. For example, there are several companies that have programs that attach proprietary cell-killing payloads to antibodies for targeted delivery to cancer cells.
In addition to competition from alternative treatments, we eventually may also face competition from products that are biosimilar to, and possibly interchangeable with, our product candidates. Even if our product candidates achieve marketing approval, they may be priced at a significant premium over competitive biosimilar products, and insurers or other third-party payors may encourage or even require the use of lower priced biosimilar products. In addition, we may face significant competition upon expiration of our intellectual property protection.
We also face substantial competition with respect to our EBI-031 program. The current standard of care for DME includes anti-VEGF therapies and corticosteroids. Some patients with DME are effectively treated by the current standard of care therapies. Approved anti-VEGF therapies for treating DME include Lucentis (ranibizumab) and Eylea® (aflibercept). Off-label use of Avastin (bevacizumab) is also seen in DME. Approved corticosteroid therapies include Ozurdex (dexamethasone implant) and Iluvien (fluocinolone implant). Laser photocoagulation was historically the standard of care for treating DME, in particular for a subcategory of DME called clinically significant macular edema, and is still used to treat some DME patients. However, anti-VEGF therapy has been proven in clinical trials to have superior efficacy over laser photocoagulation.
Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than product candidates that we may develop. Our competitors also may obtain FDA or other regulatory approval for their products more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market position before we are able to enter the market.
In addition, our ability to compete may be affected in many cases by insurers or other third-party payors, particularly Medicare, seeking to encourage the use of generic drug products. Generic products are currently being used as part of the standard of care for the indications that we are pursuing, and additional products are expected to become available on a generic basis over the coming years. If any product candidate that we may develop achieves marketing approval, we expect that it will be priced at a significant premium over competitive generic products.
More established companies may have a competitive advantage over us due to their greater size, cash flowresources and institutional experience. Compared to us, many of our competitors may have significantly greater financial, technical and human resources. As a result of these factors, our competitors may obtain regulatory approval of their product candidates before we are able to, which may limit our ability to develop or commercialize our product candidates. Our competitors may also develop drugs that are safer, more effective, more widely used and cheaperless expensive than ours, and may also be more successful than us in manufacturing and marketing their products. These appreciable advantages could render our product candidates obsolete or non-competitive before we can recover the expenses of development and commercialization.
IfOur product candidates may face competition from biosimilar products.
With the value framework publishedenactment of the BPCIA, abbreviated pathways for approval of biosimilar and interchangeable biological products were created. The BPCIA establishes legal authority for the FDA to review and approve biosimilars for marketing, as well as biosimilars that have been designated as “interchangeable” with a previously approved biologic, or reference product. Under the BPCIA, an application for a biosimilar product cannot be approved by the ASCO to assessFDA until 12 years after the valuereference product was approved under a full BLA. This period of cancer treatment optionsregulatory exclusivity runs concurrently with, but is adopted and utilized by payors and physicians and we were to receive low ratings, it could adversely affectindependent of, periods of patent protection for the price and reimbursement of our products, if approved, reduce prescriptions and harm our business.reference product.

On May 31, 2016, ASCO published a framework to assess the value of cancer treatment options. The framework was developed in response to concern that new, expensive cancer treatments may not be supported by adequate medical evidence. The purpose of the framework is to provide a standardized quantification of cancer treatments and assist oncologists and patients in deciding between new cancer treatments and the standard of care. The framework takes into account a medication’s (i) efficacy, (ii) safety and (iii) cost, to derive an overall treatment value.
This framework is described by ASCO as providing a basis for a new software tool that doctors can use to assist shared decision-making with their patients. While weWe believe that the safety and efficacy profilesany of our product candidates, are potentially better than thatincluding Vicineum for the treatment of non-muscle invasive CIS of the standardbladder in patients previously treated with adequate or less than adequate BCG, approved as a biological product under a full BLA should qualify for a 12-year period of careexclusivity. However:
the United States Congress could amend the BPCIA to significantly shorten this exclusivity period as has been previously proposed; and if approved, we intend
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a potential competitor could seek and obtain approval of its own BLA during our exclusivity period instead of seeking approval of a biosimilar version.
The BPCIA is complex and its provisions continue to price our products competitively, we do not know howbe interpreted and implemented by the data will be assessed by ASCO. It is also unknown when ASCO will releaseFDA and United States courts. As a versionresult, the ultimate impact, implementation and implications of the software application relating to the updated framework and whether use of this application could adversely affect the assessment of any of our product candidates. If this framework and software were adopted and utilized by payors and physicians, and if our product candidates were to receive low ratings, this could adversely affect the price and reimbursement of our product candidates, if approved, reduce prescriptions and harm our business.
Even if weBPCIA are able to commercialize any product candidate that we may develop, the products may become subject to unfavorable pricing regulations, third-party coverage or reimbursement practices or healthcare reform initiatives, whichuncertainty and could harmcompromise the future commercial prospects for our business.
Our ability to commercialize any product candidates that we may develop successfully will depend, in part, onbiological products. Moreover, it is not yet clear the extent to which coverage and adequate reimbursement for these products and related treatments will be available from government healthcare programs, private health insurers, managed care plans and other organizations. Government authorities and third-party payors, such as private health insurers and health maintenance organizations, decide which medications they will pay for and establish reimbursement levels. A primary trend in the U.S. healthcare industry and elsewhere is cost containment. Government authorities and third-party payors have attempted to control costs by limiting coverage and the amount of reimbursement for particular medications. Increasingly, third-party payors are requiring that drug companies provide them with predetermined discounts from list prices and are challenging the prices charged for medical products. Coverage and reimbursement may not be available for a product that we commercialize and, even if they are available, the level of reimbursement may not be satisfactory.
Inadequate reimbursement may adversely affect the demand for, or the price of, any product candidate for which we obtain marketing approval. Obtaining and maintaining adequate reimbursement for our productsbiosimilar, once approved, may be difficult. We may be required to conduct expensive pharmacoeconomic studies to justify coverage and reimbursement or the level of reimbursement relative to other therapies. If coverage and adequate reimbursement are not available or reimbursement is available only to limited levels, we may not be able to successfully commercialize any product candidate for which we obtain marketing approval.
There may be significant delays in obtaining coverage and reimbursement for newly approved drugs, and coverage may be more limited than the indications for which the drug is approved by the FDA or similar regulatory authorities outside the United States, including Health Canada, or the European Commission. Moreover, eligibility for coverage and reimbursement does not imply that a drug will be paid for in all cases or at a rate that covers our costs, including research, development, manufacture, sale and distribution expenses. Interim reimbursement levels for new drugs, if applicable, may also not be sufficient to cover our costs and may not be made permanent. Reimbursement rates may vary according to the clinical setting in which a drug is used, may be based on reimbursement levels already set for lower cost drugs and may be incorporated into existing payments for other services. Net prices for drugs may be reduced by mandatory discounts or rebates required by government healthcare programs or private payors and by any future relaxation of laws that presently restrict imports of drugs from countries where they may be sold at lower prices than in the United States. Third-party payors often rely upon Medicare coverage policy and payment limitations in setting their own reimbursement policies. Our inability to promptly obtain coverage and adequate reimbursement rates from both government-funded and private payorssubstituted for any approvedone of our reference products that we develop would compromise our ability to generate revenues and become profitable.
The regulations that govern marketing approvals, pricing, coverage and reimbursement for new drug products vary widely from country to country. Current and future legislation may significantly change the approval requirements in ways that could involve additional costs and cause delays in obtaining approvals. Some countries require approval of the sale price of a drug before it can be marketed. In many countries, the pricing review period begins after marketing or product licensing approval is granted. In some foreign markets, prescription pharmaceutical pricing remains subject to continuing governmental control even after initial approval is granted. As a result, we might obtain marketing approval for a product in a particular country, but then be subjectway that is similar to price regulationstraditional generic substitution for pharmaceutical products; this will depend on a number of marketplace and regulatory factors that delay our commercial launchare still developing at both the federal and state levels of the product, possibly for lengthy time periods, and negatively impact the revenues we are able to generate from the sale of the product in that country. To obtain reimbursement or pricing approval in some countries, we may be required to conduct a clinical trial that compares the cost-effectiveness of our

product candidate to other available therapies. Adverse pricing limitations may hinder our ability to recoup our investment in one or more product candidates, even if our product candidates obtain marketing approval.
There can be no assurance that our product candidates or any products that we may in-license, if they are approved for sale in the United States or in other countries, will be considered medically reasonable and necessary for a specific indication, that they will be considered cost-effective by third-party payors, that coverage and an adequate level of reimbursement will be available, or that third-party payors’ reimbursement policies will not adversely affect our ability to sell our product candidates profitably. In addition, we are unable to predict what changes in legislation or regulation relating to the health care industry or third-party coverage and reimbursement may be enacted in the future and how such legislation or regulation could impact our business. See the risk factor in this Annual Report on Form 10-K entitled “Current and future legislation may increase the difficulty and cost for us and any collaborators to obtain marketing approval of our product candidates and affect the prices we, or they, may obtain” in this Annual Report on Form 10-K for more information, including with respect to the Affordable Care Act.government.
Product liability lawsuits against us could cause us to incur substantial liabilities and to limit commercialization of any products that we develop.Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved.
We face an inherent risk of product liability exposure related to the use of any product candidates that we developVicineum for the treatment of non-muscle invasive CIS of the bladder in human clinical trials and will face an even greater risk if we commercially sell any products that we develop.patients previously treated with adequate or less than adequate BCG. If we cannot successfully defend ourselves against claims that our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or productsless than adequate BCG caused injuries, we will incur substantial liabilities. Regardless of merit or eventual outcome, liability claims may result in:
decreased demand for any product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or products that we develop;less than adequate BCG;
injury to our reputation and significant negative media attention;
withdrawal of clinical trial subjects;patients;
significant costs to defend the related litigation;
substantial monetary awards to trial subjects or patients;
loss of revenue;
reduced time and attention of our management to pursue our business strategy; and
the inability to commercialize any products that we develop.Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
We currently hold $10.0 million CAD in product liability insurance coverage in the aggregate, with a per incident limit of $10.0 million CAD, which may not be adequate to cover all liabilities that we may incur. We would need to increase our insurance coverage if we expand our clinical development activities beyond historical levels. We would need to further increase our insurance coverage if Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG is approved, and we commence commercialization of any product candidate that receives marketing approval.commercialization. Insurance coverage is increasingly expensive. We may not be able to maintain insurance coverage at a reasonable cost or in an amount adequate to satisfy any liability that may arise.
We conduct certain elements of our business internationally, and the decisions of sovereign governments could have a material adverse effect on our business, financial condition and results of operations.
Viventia was founded as a Canadian company and conducted its business internationally. In addition to our clinical trials in the United States and Canada, Viventia has historically conducted clinical trials in Russia, Brazil and Canada. We intend to, and may, conduct clinical trials in other jurisdictions. Sovereign governments, including Canada, may establish laws or regulations that will be deleterious to our interests or that will affect our ability, to obtain access to regulatory agencies in Russia, Brazil, Canada, and/or other jurisdictions. Governments have also, from time to time, established foreign exchange controls which could have a material adverse effect on our business, financial condition and results of operations. To date, neither our operations nor our financial condition have been materially impacted due to laws or regulations of sovereign governments.
Risks Related to the License Agreement with Roche
We depend on our license agreement with Roche for the development and commercialization of EBI-031.
On June 10, 2016, we entered into the License Agreement with Roche. The License Agreement became effective on August 16, 2016, following stockholder approval. Under the License Agreement, we granted Roche an exclusive, worldwide license, including the right to sublicense, to our patent rights and know-how related to our monoclonal antibody EBI-031 or any other

IL-6 antagonist anti-IL-6 monoclonal antibody, to make, have made, use, have used, register, have registered, sell, have sold, offer for sale, import and export any product containing such an antibody or any companion diagnostic used to predict or monitor response to treatment with such a product, or collectively, Licensed Intellectual Property.
Pursuant to the terms of the License Agreement, Roche is required to continue developing EBI-031 and any other product made from the Licensed Intellectual Property that contains an IL-6 antagonist anti-IL-6 monoclonal antibody, or Licensed Product, at its cost.
Roche paid an up-front license fee of $7.5 million upon effectiveness of the license under the License Agreement, and agreed to pay up to an additional $262.5 million upon the achievement of specified regulatory, development and commercial milestones with respect to up to two unrelated indications. Specifically, an aggregate amount of up to $197.5 million is payable to us for the achievement of specified milestones with respect to the first indication: consisting of $72.5 million in development milestones, $50.0 million in regulatory milestones and $75.0 million in commercialization milestones.
The first development milestone payment equaled $22.5 million as a result of the IND application for EBI-031 becoming effective on or before September 15, 2016, and which was paid to us in September 2016. Additional amounts of up to $65.0 million are payable upon the achievement of specified development and regulatory milestones in a second indication.
In addition, we are entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% for net sales of potential future products containing EBI-031 and up to 50% of these rates for net sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to the buy-out options of Roche further described below.
The License Agreement provides for two “option periods” during which Roche may elect to make a one-time payment to us and, in turn, terminate its diligence, milestone and royalty payment obligations under the License Agreement. Specifically, (i) Roche may exercise a buy-out option following Initiation in the first Phase 2 study for a Licensed Product until the day before Initiation of the first Phase 3 study for a Licensed Product, in which case Roche is required to pay us $135.0 million within 30 days after Roche’s exercise of such buy-out option and receipt of an invoice from us, or (ii) Roche may exercise a buy-out option following the day after Initiation of the first Phase 3 study for a Licensed Product until the day before the acceptance for review by the FDA or other regulatory authority of a BLA or similar application for marketing approval for a Licensed Product in either the United States or in the E.U., in which case Roche is required to pay us, within 30 days after Roche’s exercise of such buy-out option and receipt of an invoice from us, $265.0 million, which amount would be reduced to $220.0 million if none of our patent rights containing a composition of matter claim covering any compound or Licensed Product has issued in the E.U.
The right to potential future payments under the License Agreement represents a significant portion of the value of the License Agreement to us. We cannot be certain that we will receive any future payments under the License Agreement, which would adversely affect the trading price of our common stock and our business prospects.
Additionally, if Roche were to breach or terminate the License Agreement, we may not be able to obtain, or may be delayed in obtaining, marketing approvals for EBI-031 and will not be able to, or may be delayed in our efforts to, successfully commercialize EBI-031. We may not be able to seek and obtain a viable, alternative collaborator to partner for the development and commercialization of the licensed products on similar terms or at all.
Risks Related to Our Dependence on Third Parties
We will depend on Qilu for the development and commercialization of Vicineum in Greater China.
On July 30, 2020, we entered into the Qilu License Agreement. Under the terms of the Qilu License Agreement, Qilu has an exclusive license to manufacture, develop and commercialize Vicineum in Greater China, including mainland China, Hong Kong, Macau and Taiwan. The timing and amount of any milestone and royalty payments we may receive under the Qilu License Agreement will depend in part on Qilu’s efforts. We will also depend on Qilu to comply with all applicable laws relative to the manufacturing, development and commercialization of Vicineum in Greater China. We do not control the individual efforts of Qilu, and any failure by Qilu to devote sufficient time and effort to the manufacture, development and commercialization of Vicineum could have a material adverse impact on our financial results and operations, such as by a failure of Qilu to meet its obligations to us, including future milestone and royalty payments. In addition, if Qilu were to violate, or was alleged to have violated, any laws or regulations during the performance of its obligations for us, it is possible that we could suffer financial and reputational harm or other negative outcomes, including possible legal consequences.
Any termination, breach or expiration of the Qilu License Agreement could have a material adverse effect on our financial position by reducing or eliminating the potential for us to receive milestones and royalties. In such an event, we may be required to devote additional efforts and to incur additional costs associated with pursuing the manufacture, development and commercialization of Vicineum in Greater China. If we breach our obligations under the Qilu License Agreement and are unable to cure such breach, Qilu may terminate the Qilu License Agreement and retain all rights to manufacture, develop and commercialize Vicineum in Greater China with no obligation to make any additional milestone or royalty payments. Qilu has the right to receive a refund of all amounts paid us in the event the Qilu License Agreement is terminated under certain
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circumstances. In addition, the royalty rate is subject to reduction under certain circumstances, including when there is no valid claim of a licensed patent for Vicineum in a particular region or no data or regulatory exclusivity for Vicineum in a particular region.
We have entered into and may enter into collaborationsadditional OUS business development partnerships or licenseout-license agreements with third parties for the developmentcommercialization or commercializationdevelopment of our product candidates. If our collaborationsOUS business development partnerships or licensesout-licenses are not successful, we may not be able to capitalize on the market potential of these product candidates.
We have sought and may seek additional third-party collaboratorspartners or licensees for development and commercialization of our product candidates.candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. Our current and likely collaboratorscommercialization partners or licensees for any sales, marketing, distribution, development, licensing or broader collaboration arrangements include large and mid-size pharmaceutical companies, regional and national pharmaceutical companies and biotechnology companies. We are not currently party to any such arrangement, other than the License Agreement with Roche. Our ability to generate revenues from these arrangements depend and will depend on our collaborators’partners' or licensee'slicensees' abilities and efforts to successfully perform the functions assigned to them in these arrangements.


CollaborationsOUS business development partnerships and licenses involving our product candidates including the License Agreement with Roche, pose a number of risks, including the following:
collaboratorspartners or licensees have significant discretion in determining the amount and timing of efforts and resources that they will apply to these collaborationspartnerships or licenses;
collaboratorspartners or licensees may not perform their obligations as expected;
collaborators or licensees may not pursue development and commercialization of our product candidates that receive marketing approval or may elect not to continue or renew development or commercialization programs based on clinical trial results, changes in the collaborators’ or licensees' strategic focus or available funding, or external factors, such as an acquisition, that divert resources or create competing priorities;
collaboratorspartners or licensees may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial or abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a product candidate for clinical testing;
collaboratorspartners or licensees may not pursue commercialization and development of our product candidates that receive marketing approval or may elect not to continue or renew commercialization or development programs based on clinical trial results, changes in any such partner’s or licensee’s strategic focus or available funding, or external factors, such as an acquisition, that divert resources or create competing priorities;
partners or licensees could independently develop, or develop with third parties, products that compete directly or indirectly with our products or product candidates if the collaboratorspartners or licensees believe that competitive products are more likely to be successfully developed or can be commercialized under terms that are more economically attractive than ours;
product candidates discovered under the collaborationpartnership or license with us may be viewed by our collaboratorspartners or licensees as competitive with their own product candidates or products, which may cause collaboratorspartners or licensees to cease to devote resources to the commercialization of our product candidates;
a collaboratorpartners or licenseelicensees with marketing and distribution rights to one or more of our product candidates that achieve regulatory approval may not commit sufficient resources to the marketing and distribution of such product or products;
partners or licensees could become involved in a business combination, which might deemphasize or terminate the commercialization or development of any product candidate licensed to it by us;
disagreements with collaboratorspartners or licensees, including disagreements over proprietary rights, contract interpretation or the preferred course of development, might cause delays or termination of the research, development or commercialization of product candidates, might lead to additional responsibilities for us with respect to product candidates, or might result in litigation or arbitration, any of which would divert management attention and resources, be time-consuming and expensive;
collaboratorspartners or licensees may not properly maintain or defend our intellectual property rights or may use our proprietary information in such a way as to invite litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential litigation;
collaboratorspartners or licensees may infringe the intellectual property rights of third parties, which may expose us to litigation and potential liability; and
collaborationscommercialization partners or licenses may be terminated for the convenience of the collaboratorpartner or licensee and, if terminated, we could be required to raise additional capital to pursue further development or commercialization of the applicable product candidates.
CollaborationOUS business development partnership agreements and licenses may not lead to developmentcommercialization or commercializationdevelopment of product candidates in the most efficient manner, or at all. If any collaborationspartnerships or licenses that we enter into, do not result in the successful developmentcommercialization and commercializationdevelopment of products or if one of our collaboratorspartners or licensees terminates its agreement with us, we may not receive any future research funding or milestone or royalty payments under the collaborationpartnership or license. All of the
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risks relating to product development, regulatory approval and commercialization described in this Annual Report on Form 10-K would also apply to the activities of any collaboratorscurrent or future OUS business development partners and licensees.
Additionally, subject to its contractual obligations to us, if a collaborator or licensee of ours were to be involved in a business combination, it might deemphasize or terminate the development or commercialization of any product candidate licensed to it by us. If one of our collaboratorspartners or licensees terminates its agreement with us, we may find it more difficult to attract new collaboratorspartners or licensees and our perception in the business and financial communities could be harmed.
If we are not able to establish additional collaborations, we may have to alter our development and commercialization plans and our business could be adversely affected.
For some of our product candidates, we may decide to collaborate with pharmaceutical or biotechnology companies for the development and potential commercialization of such product candidates. We face significant competition in seeking

appropriate collaborators. Whether we reach a definitive collaboration agreement will depend, among other things, upon our assessment of the collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation of a number of factors. Those factors may include the design or results of clinical trials, the likelihood of approval by the FDA or similar regulatory authorities outside the United States, including Health Canada, or the European Commission, the potential market for the subject product candidate, the costs and complexities of manufacturing and delivering such product candidate to patients, the potential of competing products, the existence of uncertainty with respect to our ownership of technology, which can exist if there is a challenge to such ownership without regard to the merits of the challenge, and industry and market conditions generally. The collaborator may also consider alternative product candidates or technologies for similar indications that may be available to collaborate on and whether such a collaboration could be more attractive than the one with us for our product candidate. We may also be restricted under future license agreements from entering into agreements on certain terms with potential collaborators. Collaborations are complex and time-consuming to negotiate and document. In addition, there have been a significant number of recent business combinations among large pharmaceutical companies that have resulted in a reduced number of potential future collaborators.
If we are unable to reach agreements with suitable collaboratorsnew partners or licensees on a timely basis, on acceptable terms, or at all, we may have to curtail the development of a product candidate, reduce or delay its development program or one or more of our other development programs, delay its potential commercialization or reduce the scope of any sales or marketing activities, or increase our expenditures and undertake development or commercialization activities at our own expense. If we elect to fund and undertake development or commercialization activities on our own, we may need to obtain additional expertise and additional capital, which may not be available to us on acceptable terms or at all. If we fail to enter into collaborationspartnerships and do not have sufficient funds or expertise to undertake the necessary development and commercialization activities, we may not be able to further develop our product candidates or bring them to market or continue to develop our product platform.
We rely on third parties to conduct our pre-clinical studies and clinical trials. If these third parties do not successfully carry out their contractual duties or meet expected deadlines, we may not be able to obtain regulatory approval for or commercialize our product candidates.
We rely on domestic and international third-party CROs to monitor and manage data for our ongoing pre-clinical and clinical programs. We rely on these parties for execution of our pre-clinical studies and clinical trials, and we control only some aspects of their activities. Nevertheless, we are responsible for ensuring that each of our pre-clinical studies and clinical trials is conducted in accordance with the applicable protocol and legal, regulatory and scientific standards, and our reliance on the CROs does not relieve us of our regulatory responsibilities. We also rely on third parties to assist in conducting our pre-clinical studies in accordance with GLP and the Animal Welfare Act requirements. We and our CROs are required to comply with U.S.US federal regulations and current GCP, which are international standards meant to protect the rights and health of subjectspatients and assure the credibility of clinical trial data that are enforced by the FDA Health Canada, the competent authorities of the E.U. member states and comparable foreignnon-US regulatory authorities for all of our product candidates in clinical development. Regulatory authorities enforce GCP through periodic inspections of trial sponsors, principal investigators and trial sites. If we or any of our CROs fail to comply with applicable GCP, the clinical data generated in our clinical trials may be deemed unreliable and the FDA or comparable foreignnon-US regulatory authorities including Health Canada and the EMA, may require us to perform additional clinical trials before approving our marketing applications.
On October 27, 2021, the FDA published a Warning Letter (the “FDA Warning Letter”) issued to a former clinical investigator in our VISTA trial for Vicineum arising from a 2021 FDA inspection related to the review of our BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. We discontinued use of the clinical site and the clinical investigator over four years ago when we learned of professional misconduct by the clinical investigator that was unrelated to the VISTA trial. The FDA Warning Letter indicated that the clinical investigator did not comply with applicable statutory requirements and applicable regulations regarding conduct of clinical investigations. The clinical investigator's medical license was temporarily suspended on May 29, 2017, due to inaccurate recordkeeping, which was unassociated with Sesen Bio and the patients in the VISTA trial. We notified the FDA of the misconduct at that time. There was no evidence found that patients were harmed by the clinical investigator’s actions. We included the corresponding patient data from the clinical site in the BLA submission to the FDA, which were thoroughly analyzed and discussed during the BLA review.
We cannot assure you that upon inspection by a given regulatory authority, such regulatory authority will determine that any of our clinical trials comply with GCP requirements. In addition, our clinical trials must be conducted with product produced under cGMP requirements. Failure to comply with these regulations may require us to repeat pre-clinical studies and clinical trials, which would delay the regulatory approval process.
Our CROs are not our employees, and except for remedies available to us under our agreements with such CROs, we cannot control whether or not they devote sufficient time and resources to our ongoing clinical, non-clinical and pre-clinical programs. If CROs do not successfully carry out their contractual duties or obligations or meet expected deadlines or if the quality or accuracy of the data they obtain is compromised due to the failure to adhere to our protocols, regulatory requirements or for other reasons, our pre-clinical studies and clinical trials may be extended, delayed or terminated and we may not be able to obtain regulatory approval for or successfully commercialize our product candidates. As a result, our results of operations and the commercial prospects for our product candidates would be harmed, our costs could increase and our ability to generate revenues could be delayed.
Because we have relied and will continue to rely on third parties, our internal capacity to perform these functions is limited. Outsourcing these functions involves risk that third parties may not perform to our standards, may not produce results in a timely manner or may fail to perform at all. In addition, the use of third-party service providers requires us to disclose our proprietary information to these parties, which could increase the risk that this information will be misappropriated. We currently have a small number of employees, which limits the internal resources we have available to identify and monitor our

third-party providers. To the extent we are unable to identify and successfully manage the performance of third-party service
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providers in the future, our business may be adversely affected. Though we carefully manage our relationships with our CROs, there can be no assurance that we will not encounter challenges or delays in the future or that these delays or challenges will not have a material adverse impact on our business, financial condition and prospects.
If we lose our relationships with CROs, our product development efforts could be delayed.
We rely on domestic and international third-party vendors and CROs for pre-clinical studies and clinical trials related to our product development efforts. Switching or adding additional CROs would involve additional cost and requires management time and focus. Our CROs generally have the right to terminate their agreements with us in the event of an uncured material breach. In addition, some of our CROs have an ability to terminate their respective agreements and/or research projects with us pursuant to such agreements if it can be reasonably demonstrated that the safety of the subjectspatients participating in our clinical trials warrants such termination in accordance with the reasonable opinion of the relevant CRO. Identifying, qualifying and managing performance of third-party service providers can be difficult, time consuming and cause delays in our development programs. In addition, there is a natural transition period when a new CRO commences work and the new CRO may not provide the same type or level of services as the original provider. If any of our relationships with our third-party CROs terminate, we may not be able to enter into arrangements with alternative CROs or to do so on commercially reasonable terms.
Our experience manufacturing our product candidates is limited to our pre-clinical studies and clinical trials. We have no experience manufacturing our product candidates on a commercial scale. We are dependent on third parties forto formulate and manufacture Vicineum, which exposes us to a number of risks that may delay development, regulatory approval and commercialization of our supply chain, and ifproducts or result in higher product costs.
In September 2017, we experience problems with any such third parties,completed the manufacturing of all Vicineum necessary for our product candidates could be delayed.
We maintain an approximately 31,400 square footVISTA Trial and for our CRADA with the NCI. In conjunction with this achievement, we ended our manufacturing laboratory, warehouse and officeactivities at our facility in Winnipeg Manitoba, Canada. We have three 15 liter fermentors, one 150 liter fermentor, one 500 liter fermentor and one 1,500 liter fermentor. Our classified fermentation suitecompleted the technology transfer process to outsource future Vicineum clinical and post-production processing capabilities are currently dedicatedcommercial to producing our pre-clinical study and clinical trial batches.third-party manufacturers.
Our manufacturing facility has been audited byOn August 13, 2021, we received a third party for compliance with cGMP. The most recent audit was in January 2014 and it did not identify any major impediments to the cGMP manufacturing of product candidates up to and including Phase 3 production. Manufacturing of drugs and product candidates, including Vicinium, Proxinium and VB6-845d, must comply with cGMP standards and other regulations. Methods of manufacture as well as validation of manufacturing procedures and quality control systems are reviewed by regulatory authorities, such as the FDA, Health Canada and the competent authorities of the E.U. Member States, to determine their effect on the quality, purity and potency of product candidates. All such manufacturing procedures, validation programs and quality assessment activities must be properly documented in accordance with regulatory requirements. The FDA, Health Canada and the competent authorities of the E.U. Member States conduct inspections to determine compliance with cGMP to ensure that product candidates used in human testing are adequately characterized in terms of identity, potency and purity. In general, the same cGMP standards expected of marketed drugs apply to the supply of product candidates evaluated in most stages of clinical testing.
Our manufacturing facility is intended to produce multiple product candidates per year, and we believe it will produce sufficient quantities of our product candidates to meet our currently anticipated pre-clinical study and clinical trial needs. In the event we obtain approvalCRL from the FDA to market any of our product candidates, we intend to outsource our commercial scale manufacturing to CMOs. We do not have experience in manufacturing products at commercial scale. Additionally, the facilities used by any CMO to manufacture any of our product candidates must be the subject of a satisfactory inspection beforeindicating that the FDA had determined that it could not approve the BLA for Vicineum in its present form and, among other applicable regulatory authorities approvethings, raised CMC issues pertaining to a BLA or marketing authorizationrecent pre-approval inspection and product quality. At the CMC Type A Meeting held in October 2021, the FDA confirmed that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical trials and that we can utilize Vicineum manufactured during process validation for each of our product candidates manufactured at that facility. We will depend on these third-party manufacturing partners for compliance with the E.U.’s, FDA’s and comparable foreign regulatory authorities’, including Health Canada’s, requirements for the manufacture of our finished products, if and when our product candidates are approved.
Any significant disruption in our supplier relationships could harm our business. Any significant delayany future clinical trials needed to address issues raised in the supply of a product candidate or its key materialsCRL, and that such trials can proceed while addressing CMC issues. Therefore, we have no current plans to re-build internal manufacturing capacity for an ongoing pre-clinical study or clinical trial could considerably delay completion of such pre-clinical study or clinical trial, product testingVicineum and potential regulatory approval of a product candidate. If our CMOs or we are unableexpect to purchase these key materials after regulatory approval has been obtained for a product candidate, the commercial launch of such product candidate would be delayed or there would be a shortage in supply, which would impair our ability to generate revenues from the sale of such product candidate.
In the event that manufacturing process changes are necessary for the further development of a product candidate, we may not be able to reach agreement with regulatory agencies on the criteria for demonstrating comparability to the original product,

which would require us to repeat clinical trials performed with the original product. This could result in lengthy delays in implementing the new process or site and substantial lost sales as a result of our inability to meet commercial demand. If we reach agreement with regulatory agencies on the criteria for establishing comparability, we may not be able to meet these criteria or may suffer lengthy delays in meeting these criteria. This may result in significant lost sales due to inability to meet commercial demand with the original product. Furthermore, studies to demonstrate comparability, or any other studies on the new process or site such as validation studies, may uncover findings that result in regulatory agencies delaying or refusing to approve the new process or site.
If we encounter difficulties in identifying and/or negotiating a commercial manufacturing agreement with a third party manufacturer of our product candidates, or if we experience problems with the third-party manufacturer, the manufacturing of our product candidates and our product development and commercialization efforts may be delayed, we may not be able to obtain regulatory approval of our product candidates, and our costs may be higher than expected, all of which could have a material adverse effect on our business.
We intendcontinue to rely upon aon third-party manufacturer for the commercial supply of our product candidates. expertise in this area.
Our reliance on a third-party manufacturer will exposemanufacturers exposes us to certain risks that we would not be subject to if we manufactured those productsVicineum ourselves, including:
The development of commercial-scale manufacturing capabilities to produce clinical supply of Vicineum may require our third-party manufacturermanufacturers to invest substantial additional funds and hire and retain technical personnel who have the necessary manufacturing experience. Our third-party manufacturermanufacturers may fail to devote sufficient time and resources to develop the capabilities to manufacture our product candidates.Vicineum.
Because of the complex nature of our product candidates,Vicineum, our third party manufacturer,manufacturers, or other third parties we rely on, may encounter difficulties in achieving the volume of production needed to satisfy commercial demand,our clinical supply demands, may not be able to achieve such volume at an acceptable cost, may experience technical issues that impact comparability, quality, or compliance with applicable regulations governing the manufacture of biological products, and may experience shortages of qualified personnel to adequately staff production operations.
Our third-party manufacturermanufacturers could default on its agreementtheir agreements with us to meet our requirements for commercializationsupply of our product candidates,Vicineum, or itthey may terminate or decide not to renew its agreementtheir agreements with us, based on itstheir own business priorities, at a time that is costly or damaging to us. If our third-party manufacturermanufacturers were to terminate our arrangementarrangements or fail to meet our commercial manufacturing demands, we may be delayed in our ability to obtain and maintain regulatory approval of our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or if approved, commercialize our product candidates.less than adequate BCG.
It may be difficult or impossible for us to find a replacement manufacturermanufacturers on acceptable terms quickly, or at all. Identifying alternate manufacturers may be difficult because the number of potential manufacturers that have the necessary expertise to produce biologics is limited. Additionally, the FDA must approve any alternative manufacturer before we may use the alternative manufacturer to produce commercialclinical supply of Vicineum.
If any third-party manufacturer makes improvements in the manufacturing process for Vicineum, we may not own, or may have to share, the intellectual property rights to such improvements.
A third-party manufacturer may gain knowledge from working with us that could be used to supply one of our competitors with a product candidate, if approved.that competes with ours.
Our reliance on a third party manufacturerthird-party manufacturers reduces our control over our commercialization activitiesproduction and supply of Vicineum but does not relieve us of our responsibility to ensure compliance with applicable legal and regulatory standards. The FDA and other foreign non-US
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regulatory authorities require that our product candidates and any products that we may eventually commercialize be manufactured according to cGMP and similar foreignnon-US standards. Methods of manufacture as well as validation of manufacturing procedures and quality control systems are reviewed by regulatory authorities, such as the FDA and other comparable non-US regulatory authorities, to determine their effect on the quality, purity and potency of product candidates. All such manufacturing procedures, validation programs and quality assessment activities must be properly documented in accordance with regulatory requirements. Any failure by our third-party manufacturermanufacturers to comply with cGMP or to scale up manufacturing processes,similar non-US standards, including any failure to deliver sufficient quantities of product candidates in a timely manner, could lead to a delay in, or failure to obtain, regulatory approval of any of our product candidates. candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. For example, we may be unable to resolve the issues raised in the CRL pertaining to a recent pre-approval inspection and product quality.
In addition, sucha failure by our third-party manufactures to comply with cGMP or similar non-US standards could be the basis for the FDA or any other foreignnon-US regulatory authorities including Health Canada, the European Commission or the competent authorities of the E.U. Member States to issue a warning or untitled letter, withdraw approvals for product candidates previously granted to us, or take other regulatory or legal action, including recall or seizure, total or partial suspension of production, suspension of ongoing clinical trials, refusal to approve pending applications or supplemental applications, detention of product, refusal to permit the import or export of products, injunction, imposing administrative or civil penalties, or pursuing criminal prosecution.
Any contamination in our manufacturing process, shortages of raw materials or failure of any of our key suppliers to deliver necessary components of our TPT platform could result in delays in our timing for clinical development or obtaining marketing approval.
Given the nature of biologics manufacturing, there is a risk of contamination. Any contamination could materially adversely affect our ability to produce our product candidates on schedule and could therefore halt or delay our clinical development programs.

Some of the raw materials required in our manufacturing process are derived from biological sources. Such raw materials are difficult to procure and may also be subject to contamination or recall. A material shortage, contamination, recall, or restriction on the use of biologically derived substances in the manufacture of our product candidates could halt or delay our clinical development programs or disrupt the commercial manufacturing of our product candidates, if approved, which could materially and adversely affect our business.
The successful commercialization and continued development of EBI-031 depends substantially on the License Agreement with Roche. If Roche is unable or unwilling to commercialize or further develop EBI-031, or experiences significant delays in doing so, our business will be materially harmed.
On June 10, 2016, we entered into the License Agreement with Roche for the development and commercialization of EBI-031. Prior to this agreement, we did not have a history of working with Roche. The License Agreement provides for milestone payments to us based on the achievement of specified development, regulatory and commercial milestones, and provides us with royalty-based revenue if EBI-031 is successfully commercialized. We cannot predict the success of the License Agreement.
We are substantially dependent on Roche to develop and commercialize EBI-031. Under the License Agreement, Roche has significant control over the conduct and timing of development and commercialization efforts with respect to EBI-031. We have little control over the amount, timing and quality of resources that Roche devotes to the development or commercialization of EBI-031. If Roche fails to devote sufficient financial and other resources to the future development or commercialization of EBI-031, the development and commercialization of EBI-031 would be delayed or could fail. This would result in a delay in our receiving milestone payments or royalties at all.
Risks Related to Our Intellectual Property
If we are unable to obtain and maintain patent protection for our technology and products, or if our licensors are unable to obtain and maintain patent protection for the technology or products that we license from them, or if the scope of the patent protection obtained is not sufficiently broad, our competitors could develop and commercialize technology and products similar or identical to ours, and our ability to successfully commercialize our technology and products may be impaired.
Our success depends in large part on our and our licensors’ ability to obtain and maintain patent protection in the United States and other countries with respect to our proprietary technology and products. We and our licensors have sought to protect our proprietary position by filing patent applications in the United States and abroad related to our novel technologies and product candidates. The patent prosecution process is expensive and time-consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. It is also possible that we will fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection. Moreover, in some circumstances, we do not have the right to control the preparation, filing and prosecution of patent applications, or to maintain the patents, covering technology that we license from third parties. Therefore, these patents and applications may not be prosecuted and enforced in a manner consistent with the best interests of our business. If such licensors fail to maintain such patents, or lose rights to those patents, the rights we have licensed may be reduced or eliminated.
The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and has in recent years been the subject of much litigation. As a result, the issuance, scope, validity, enforceability and commercial value of our and our licensors’ patent rights are highly uncertain. Our and our licensors’ pending and future patent applications may not result in patents being issued which protect our technology or products or which effectively prevent others from commercializing competitive technologies and products. In addition, the laws of foreign countries may not protect our rights to the same extent as the laws of the United States. For example, European patent law restricts the patentability of methods of treatment of the human body more than United States law does. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after filing, or in some cases not at all. Therefore, we cannot know with certainty whether we or our licensors were the first to make the inventions claimed in our owned or licensed patents or pending patent applications, or that we or our licensors were the first to file for patent protection of such inventions. As a result, the issuance, scope, validity, enforceability and commercial value of our owned or licensed patent rights are highly uncertain. Our pending and future patent applications may not result in patents being issued which protect our technology or products, in whole or in part, or which effectively prevent others from commercializing competitive technologies and products. In particular, during prosecution of any patent application, the issuance of any patents based on the application may depend upon our ability to generate additional pre-clinical or clinical data that support the patentability of our proposed claims. We may not be able to generate sufficient additional data on a timely basis, or at all. Moreover, changes in either the patent laws or

interpretation of the patent laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent protection.
Recent patent reform legislation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents. On September 16, 2011, the Leahy-Smith America Invents Act, or the Leahy-Smith Act, was signed into law. The Leahy-Smith Act includes a number of significant changes to United States patent law. These include provisions that affect the way patent applications are prosecuted and may also affect patent litigation. The United States Patent Office recently developed new regulations and procedures to govern administration of the Leahy-Smith Act, and many of the substantive changes to patent law associated with the Leahy-Smith Act, and in particular, the first to file provisions, only became effective on March 16, 2013. Accordingly, it is not clear what, if any, impact the Leahy-Smith Act will have on the operation of our business. However, the Leahy-Smith Act and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents.
Moreover, we may be subject to a third-party preissuance submission of prior art to the U.S. Patent and Trademark Office, or USPTO, or become involved in opposition, derivation, reexamination, inter partes review, post-grant review or interference proceedings challenging our patent rights or the patent rights of others. An adverse determination in any such submission, proceeding or litigation could reduce the scope of, or invalidate, our patent rights, allow third parties to commercialize our technology or products and compete directly with us, without payment to us, or result in our inability to manufacture or commercialize products without infringing third-party patent rights. In addition, if the breadth or strength of protection provided by our patents and patent applications is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates.
Even if our owned and licensed patent applications issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors from competing with us or otherwise provide us with any competitive advantage. Our competitors may be able to circumvent our owned or licensed patents by developing similar or alternative technologies or products in a non-infringing manner.
The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our owned and licensed patents may be challenged in the courts or patent offices in the United States and abroad. Such challenges may result in loss of exclusivity or freedom to operate or in patent claims being narrowed, invalidated or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent protection of our technology and products. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. As a result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours.
We may not be able to protect our intellectual property rights throughout the world.
Filing, prosecuting and defending patents on all of our product candidates and technologies throughout the world would be prohibitively expensive, and our or our licensors’ intellectual property rights in some countries outside the United States can be less extensive than those in the United States. In addition, the laws and practices of some foreign countries do not protect
intellectual property rights to the same extent as federal and state laws in the United States. Consequently, we and our licensors may not be able to prevent third parties from practicing our and our licensors’ inventions in all countries outside the United States, or from selling or importing products made using our and our licensors’ inventions in and into the United States
or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products, and may export infringing products to territories where we or our licensors have patent protection, but where enforcement is not as strong as in the United States. These products may compete with our products in jurisdictions where we do not have any issued patents and our patent claims or other intellectual property rights may not be effective or sufficient to prevent them from so competing.
Many companies have encountered significant problems in protecting and defending intellectual property rights in certain foreign jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents and other intellectual property protection, particularly those relating to biopharmaceuticals, which could make it difficult for us to stop the infringement of our or our licensor’s patents or marketing of competing products in violation of our proprietary rights generally in those countries. Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial cost and divert our efforts and attention from other aspects of our business, could put our and our licensors’ patents at risk of being invalidated or being interpreted narrowly and put our and our licensors’ patent applications at risk of not issuing and could provoke third parties to assert claims against us or our licensors. We or our licensors may not prevail in any

lawsuits that we or our licensors initiate and the damages or other remedies awarded, if any, may not be commercially meaningful.
The laws of certain foreign countries may not protect our rights to the same extent as the laws of the United States, and these foreign laws may also be subject to change. For example, methods of treatment and manufacturing processes may not be patentable in certain jurisdictions, and the requirements for patentability may differ in certain countries, particularly developing countries. Furthermore, generic and/or biosimilar product manufacturers or other competitors may challenge the scope, validity or enforceability of our or our licensors’ patents, requiring us or our licensors to engage in complex, lengthy and costly litigation or other proceedings.
Generic or biosimilar product manufacturers may develop, seek approval for, and launch biosimilar versions or generic versions, respectively, of our products. The FDA published draft guidance documents on biosimilar product development. If a biosimilar product is also found to be interchangeable with a reference product, it may be substituted for the reference product.
Complexities associated with the larger, and often more complex, structures of biological products, as well as the process by which such products are manufactured, pose significant hurdles to implementation, which are still being worked out by the FDA. If any of our product candidates are approved by the FDA, the approval of a biologic product biosimilar to or interchangeable with one of our products could have a material impact on our business. In particular, a biosimilar could be significantly less costly to bring to market and priced significantly lower than our products, if approved by the FDA.
Many countries, including E.U. countries, have compulsory licensing laws under which a patent owner may be compelled under certain circumstances to grant licenses to third parties. In those countries, we and our licensors may have limited remedies if patents are infringed or if we or our licensors are compelled to grant a license to a third party, which
could materially diminish the value of those patents. This could limit our potential revenue opportunities. Accordingly, our and our licensors’ efforts to enforce intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we own or license.
We have not yet registered our trademarks in all of our potential markets, and failure to secure those registrations could adversely affect our business.
Our future trademark applications may not be allowed for registration, and our registered trademarks may not be maintained or enforced. During trademark registration proceedings, we may receive rejections from the USPTO or other applicable foreign intellectual property offices. Although we are given an opportunity to respond to those rejections, we may be unable to overcome such rejections, or have to expend additional resources to secure registrations, such as commencing cancellation proceedings against third-party trademark registrations to remove them as obstacles to our trademark applications. In addition, in the USPTO and in comparable agencies in many foreign jurisdictions, third parties are given an opportunity to oppose pending trademark applications and to seek to cancel registered trademarks. Opposition or cancellation proceedings may be filed against our trademarks, and our trademarks may not survive such proceedings. If we do not secure registrations for our trademarks, we may encounter more difficulty in enforcing them against third parties than we otherwise would.
We depend on our license agreements with the University of Zurich and Merck KGaA and if we cannot meet the requirements under the agreements we could lose important rights to Vicinium, Proxinium or VB6-845d, which could have material adverse effect on our business.
We have an exclusive license agreement with Zurich. Pursuant to the agreement, we were granted an exclusive license, with the right to sublicense, under certain patents primarily relating, in part, to our targeting agents, EpCAM chimera and immunoconjugates (including aspects of Vicinium and Proxinium) and methods of use, to make, use, sell and import products that would otherwise infringe such patents in the field of the treatment, stasis and palliation of disease in humans. If we fail to meet our obligations under the license agreement, Zurich may have the right to terminate our license, and upon the effective date of such termination, our right to use the licensed Zurich patent rights would end. To the extent such licensed technology or patent rights relate to our product candidates, we would expect to exercise all rights and remedies available to us, including attempting to cure any breach by us, and otherwise seek to preserve our rights under the patent rights licensed to us, but we may not be able to do so in a timely manner, at an acceptable cost to us or at all. Any uncured, material breach under the license agreement could result in our loss of rights to practice the patent rights licensed to us under the license agreement, and to the extent such patent rights and other technology relate to our product candidates or other of our compounds, it could have a material adverse effect on our commercialization efforts for our product candidates, including Vicinium and Proxinium.
We also have a license agreement with Merck, which grants us an exclusive license, with the right to sublicense, under certain patents and technology relating to the de-immunization of our cytotoxin Bouganin for therapeutic and in vivo diagnostic purposes in humans. If we fail to meet our obligations under this license agreement, Merck may have the right to terminate our

license, and upon the effective date of such termination, our right to use the licensed Merck patent rights and technology would end. To the extent such licensed technology or patent rights relate to our product candidates, we would expect to exercise all rights and remedies available to us, including attempting to cure any breach by us, and otherwise seek to preserve our rights under the patent rights and technology licensed to us, but we may not be able to do so in a timely manner, at an acceptable cost to us or at all. Any uncured, material breach under the license agreement could result in our loss of rights to practice the patent and technology rights licensed to us under the license agreement, and to the extent such patent rights and other technology relate to our product candidates, it could have a material adverse effect on our commercialization efforts for product candidates.
We may become involved in lawsuits to protect or enforce our patents or other intellectual property, which could be expensive, time consuming and unsuccessful.
Competitors may infringe our issued patents or other intellectual property. To counter infringement or unauthorized use, we may be required to file infringement claims, which can be expensive and time consuming. Any claims we assert against perceived infringers could provoke these parties to assert counterclaims against us alleging that we infringe their patents. In addition, in a patent infringement proceeding, a court may decide that a patent of ours is invalid or unenforceable, in whole or in part, construe the patent’s claims narrowly or refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation proceeding could put one or more of our patents at risk of being invalidated or interpreted narrowly. Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation.
Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain and could have a material adverse effect on the success of our business.
Our commercial success depends upon our ability, and the ability of our collaborators, to develop, manufacture, market and sell our product candidates and use our proprietary technologies without infringing the proprietary rights of third parties. There is considerable intellectual property litigation in the biotechnology and pharmaceutical industries. We may become party to, or threatened with, future adversarial proceedings or litigation regarding intellectual property rights with respect to our products and technology, including interference or derivation proceedings before the USPTO. The risks of being involved in such litigation and proceedings may increase as our product candidates near commercialization and as we gain the greater visibility associated with being a public company. Third parties may assert infringement claims against us based on existing patents or patents that may be granted in the future. We may not be aware of all such intellectual property rights potentially relating to our product candidates and their uses. Thus, we do not know with certainty that any product candidate, or our commercialization thereof, does not and will not infringe or otherwise violate any third party’s intellectual property.
If we are found to infringe a third party’s intellectual property rights, we could be required to obtain a license from such third party to continue developing and marketing our products and technology. However, we may not be able to obtain any required license on commercially reasonable terms or at all. Even if we were able to obtain a license, it could be non-exclusive, thereby giving our competitors access to the same technologies licensed to us. We could be forced, including by court order, to cease commercializing the infringing technology or product. In addition, we could be found liable for monetary damages, including treble damages and attorneys’ fees if we are found to have willfully infringed a patent. A finding of infringement could prevent us from commercializing our product candidates or force us to cease some of our business operations. Claims that we have misappropriated the confidential information or trade secrets of third parties could have a similar negative impact on our business.
If we fail to comply with our obligations in our intellectual property licenses and funding arrangements with third parties, we could lose rights that are important to our business.
We are party to a number of license agreements and a collaboration agreement that impose, and, for a variety of purposes, we will likely enter into additional licensing and funding arrangements with third parties that may impose, diligence, development and commercialization timelines and milestone payment, royalty, insurance and other obligations on us. Under certain of our existing licensing agreements, we are obligated to pay royalties or make specified milestone payments on net product sales of product candidates or related technologies to the extent they are covered by the agreement. We also are obligated under certain of our existing license agreements to pay maintenance and other fees. We also have diligence and development obligations under certain of those agreements that we are required to satisfy. If we fail to comply with our obligations under current or future license and collaboration agreements, our counterparties may have the right to terminate these agreements, in which event we might not be able to develop, manufacture or market any product that is covered by these agreements or may face other penalties under the agreements. Such an occurrence could diminish the value of the product candidate being developed under any such agreement. Termination of these agreements or reduction or elimination of our rights under these agreements

may result in our having to negotiate new or reinstated agreements with less favorable terms, or cause us to lose our rights under these agreements, including our rights to important intellectual property or technology.
We may be subject to claims by third parties asserting that our employees, consultants, independent contractors or we have misappropriated their intellectual property, or claiming ownership of what we regard as our own intellectual property.
Many of our employees and our licensors’ employees, including our senior management, were previously employed at universities, medical institutions or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Some of these employees, including members of our senior management, executed proprietary rights, non-disclosure and non-competition agreements, or similar agreements, in connection with such previous employment. Although we try to ensure that our employees do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that these employees or we have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such employee’s former employer. Litigation may be necessary to defend against these claims.
In addition, while it is our policy to require our employees and contractors who may be involved in the development of intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who in fact develops intellectual property that we regard as our own. Our and their assignment agreements may not be self-executing or may be breached, and we may be forced to bring claims against third parties, or defend claims they may bring against us, to determine the ownership of what we regard as our intellectual property.
If we fail in prosecuting or defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel. Even if we are successful in prosecuting or defending against such claims, litigation could result in substantial costs and be a distraction to management.
Intellectual property litigation could cause us to spend substantial resources and distract our personnel from their normal responsibilities.
Even if resolved in our favor, litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses, and could distract our technical and management personnel from their normal responsibilities. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments and if securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock. Such litigation or proceedings could substantially increase our operating losses and reduce the resources available for development activities or any future sales, marketing or distribution activities. We may not have sufficient financial or other resources to conduct such litigation or proceedings adequately. Some of our competitors may be able to sustain the costs of such litigation or proceedings more effectively than we can because of their greater financial resources. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could compromise our ability to compete in the marketplace.
If we are unable to protect the confidentiality of our trade secrets, our business and competitive position would be harmed.
In addition to seeking patents for some of our technology and product candidates, we also rely on trade secrets, including unpatented know-how, technology and other proprietary information, to maintain our competitive position. We seek to protect these trade secrets, in part, by entering into non-disclosure and confidentiality agreements with parties who have access to them, such as our employees, corporate collaborators, outside scientific collaborators, contract manufacturers, consultants, advisors and other third parties. We also enter into confidentiality and invention or patent assignment agreements with our employees and consultants. Despite these efforts, any of these parties may breach the agreements and disclose our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. Enforcing a claim that a party illegally disclosed or misappropriated a trade secret is difficult, expensive and time-consuming, and the outcome is unpredictable. In addition, some courts inside and outside the United States are less willing or unwilling to protect trade secrets. If any of our trade secrets were to be lawfully obtained or independently developed by a competitor, we would have no right to prevent them, or those to whom they communicate it, from using that technology or information to compete with us. If any of our trade secrets were to be disclosed to or independently developed by a competitor, our competitive position would be harmed.
Intellectual property rights do not necessarily address all potential threats to our competitive advantage.
The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations, and may not adequately protect our business, or permit us to maintain our competitive advantage. The following examples are illustrative:

others may be able to make product candidates that are the same as or similar to our product candidates but that are not covered by the claims of the patents that we own or have licensed;
biosimilar product manufacturers may develop, seek approval for, and launch biosimilar versions of our products, which could be significantly less costly to bring to market and priced significantly lower than our products;
we or our licensors might not have been the first inventor to file patent applications covering certain of our inventions;
others may design around our intellectual property rights or independently develop similar or alternative technologies or duplicate any of our technologies without infringing or misappropriating our intellectual property rights;
it is possible that our pending patent applications will not lead to issued patents with claims that cover our products or even issued patents;
issued patents that we own or have exclusively licensed may not provide us with any competitive advantages, or may be held invalid or unenforceable as a result of legal challenges;
our competitors might conduct research and development activities in the United States and other countries that provide a safe harbor from patent infringement claims for certain research and development activities, as well as in countries where we do not have patent rights and then use the information learned from such activities to develop competitive products for sale in our major commercial markets;
we may not develop additional proprietary technologies or product candidates that are patentable; and
the intellectual property rights of others may have an adverse effect on our business.
Risks Related to Regulatory and Marketing Approval of Our Product Candidates and Other Legal Compliance Matters
If we are not able to obtain required regulatory approvals, or there are delays in obtaining approvals, we will not be able to commercialize any product candidate that we may develop, and our ability to generate revenue will be materially impaired. The marketing approval process is expensive, time-consuming and uncertain. As a result, we cannot predict when or if we, or any licensees or collaborators, will obtain marketing approval to commercialize any product candidate.
To date, we have not obtained approval from the FDA or any foreign regulatory authority, including Health Canada and the European Commission, to market or sell any of our product candidates. The failure to obtain marketing approval for a product candidate will prevent us from commercializing the product candidate. The activities associated with the development and commercialization of our product candidates, including design, testing, manufacture, quality, safety, efficacy, recordkeeping, labeling, storage, approval, advertising, promotion, sale and distribution, are subject to comprehensive regulation by the FDA and other regulatory agencies in the United States and by the EMA, the competent authorities of the E.U. Member States, Health Canada and similar regulatory authorities outside the United States. We have only limited experience in filing and supporting the applications necessary to gain marketing approvals and expect to rely on third-party CROs to assist us in this process.
The process of obtaining marketing approvals, both in the United States and abroad, is expensive and may take many years, especially if additional clinical trials are required, if approval is obtained at all. Securing marketing approval requires the submission of extensive pre-clinical and clinical data and supporting information to regulatory authorities for each therapeutic indication to establish the product candidate’s quality, safety, and efficacy. Securing marketing approval also requires the submission of information about the product manufacturing process to, and inspection of manufacturing facilities by, the regulatory authorities. The FDA, Health Canada, EMA or other regulatory authorities may determine that any product candidate that we may develop is not safe, effective or of appropriate quality, is only moderately effective or has undesirable or unintended side effects, toxicities or other characteristics that preclude our obtaining marketing approval or prevent or limit commercial use. Any marketing approval we ultimately obtain may be limited or subject to restrictions or post-approval commitments that render the approved product not commercially viable.
The regulatory process can vary substantially based upon a variety of factors, including the type, complexity and novelty of the product candidates involved. Moreover, changes in marketing approval policies during the development period, changes in or the enactment of additional statutes or regulations, or changes in regulatory review for each submitted product application, may cause delays in the approval or rejection of an application. The FDA and comparable regulatory authorities in other countries, including Health Canada and the European Commission, have substantial discretion in the approval process and may refuse to accept any application or may decide that our data is insufficient for approval and require additional pre-clinical, clinical or other studies. In addition, varying interpretations of the data obtained from pre-clinical and clinical testing could delay, limit or prevent marketing approval of a product candidate. In November 2016, the FDA issued draft guidance on developing drugs and biologics for treating BCG-unresponsive NMIBC, which sets forth certain expectations for our development of Vicinium. We

may be unable to satisfy all recommendations contained in the FDA guidance and, even if we do, it is not guaranteed that meeting all such recommendations will be sufficient to obtain marketing approval.
The different requirements and expectations of the EMA and Health Canada compared with the FDA may lengthen the regulatory review process, require us to conduct additional studies or clinical trials, increase our development costs, lead to changes in regulatory positions and interpretations, delay or prevent approval and commercialization of these product candidates or lead to significant post approval limitations or restrictions. If we experience delays in obtaining regulatory approvals, the commercial prospects for our product candidates may be harmed and our ability to generate revenues will be materially impaired.
Some of our product candidates may qualify for orphan drug designation, and if we obtain approval for these product candidates, orphan drug exclusivity may afford limited protection. If another party obtains orphan drug exclusivity before we do for the same drug for the same indication we are targeting, we may be precluded from commercializing our product candidate in that indication until the other party’s period of exclusivity has ended.
Regulatory authorities in some jurisdictions, including the United States and the E.U., may designate drugs and biologics intended to treat relatively small patient populations as orphan drugs. Under the Orphan Drug Act, the FDA may designate a product as an orphan drug if it is a biologic intended to treat a rare disease or condition, which generally means a disease or condition that affects fewer than 200,000 individuals in the United States. The first BLA applicant with an orphan drug designation that receives FDA approval is entitled to a seven-year period of orphan drug exclusivity in the United States, during which the FDA generally may not approve another application for a product with the same principal molecular structural features for the same indication. In the E.U., following the opinion of the EMA’s Committee for Orphan Medicinal Products, the European Commission grants orphan drug designation to a product if (1) it is intended for the diagnosis, prevention or treatment of a life-threatening or chronically debilitating condition; (2) either (a) such condition affects no more than five in 10,000 persons in the E.U. when the application is made, or (b) the product, without the incentives derived from orphan medicinal product status, would not generate sufficient return in the E.U. to justify investment; and (3) there exists no satisfactory method of diagnosis, prevention or treatment of such condition authorized for marketing in the E.U., or if such a method exists, the product will be of significant benefit to those affected by the condition. Once authorized, orphan medicinal products are entitled to ten years of market exclusivity.
We have obtained orphan drug designation from the FDA and the European Commission for Proxinium to treat EpCAM-positive SCCHN, and where appropriate we intend to seek orphan drug designation for our other product candidates. In the U.S., we cannot assure that any or all of our product candidates that receive orphan drug designation will, upon approval, have seven years of orphan drug exclusivity. The FDA may revoke orphan drug designation under certain circumstances, including if the agency determines that the request for orphan drug designation omitted material information or subsequently finds that the biologic had not been eligible for orphan drug designation at the time the request for designation was submitted. Revocation of orphan drug designation suspends the associated orphan drug exclusivity. Also, the FDA may approve another sponsor’s application for the same drug for the same use, prior to the expiration of our product’s orphan drug exclusivity, under certain circumstances, including if we are unable to assure sufficient quantity of our product, or if the other sponsor can demonstrate that its product candidate is clinically superior to ours by showing superior safety or efficacy or a major contribution to patient care. In addition, if a competitor obtains approval and orphan drug exclusivity for a product that is the same as a product candidate we are pursuing for the same indication, approval of our product candidate would be blocked during the period of the competitor’s orphan drug exclusivity, unless we could demonstrate that our product candidate is clinically superior to the approved product. Also, if a competitor obtains approval for a drug that is the same as a product candidate we are pursuing for a different orphan indication, the competitor’s approval may negatively impact the market opportunity for our product candidate, even if our product is granted orphan drug exclusivity.
Products authorized in the E.U. as orphan medicinal products are entitled to ten years of data exclusivity. The products are, in parallel, entitled to ten years of market exclusivity. The ten-year market exclusivity may be reduced to six years if, at the end of the fifth year, it is established that the product no longer meets the criteria for orphan designation, for example, if the product is sufficiently profitable not to justify maintenance of market exclusivity. Additionally, marketing authorization may be granted to a similar product during the ten-year period of market exclusivity for the same therapeutic indication at any time if:
The second applicant can establish in its application that its product, although similar to the orphan medicinal product already authorized, is safer, more effective or otherwise clinically superior;
The holder of the marketing authorization for the original orphan medicinal product consents to a second orphan medicinal product application; or

The holder of the marketing authorization for the original orphan medicinal product cannot supply enough orphan medicinal product.
Our product candidates for which we intend to seek approval as biological products may face competition sooner than expected.
With the enactment of the BPCIA, abbreviated pathways for approval of biosimilar and interchangeable biological products were created. The BPCIA establishes legal authority for the FDA to review and approve biosimilars for marketing, as well as biosimilars that have been designated as “interchangeable” with a previously approved biologic, or reference product. Under the BPCIA, an application for a biosimilar product cannot be approved by the FDA until 12 years after the reference product was approved under a full BLA. This period of regulatory exclusivity runs concurrently with, but is independent of, periods of patent protection for the reference product.
We believe that any of our product candidates approved as a biological product under a full BLA should qualify for a 12-year period of exclusivity. However:
the United States Congress could amend the BPCIA to significantly shorten this exclusivity period as has been previously proposed; and
a potential competitor could seek and obtain approval of its own BLA during our exclusivity period instead of seeking approval of a biosimilar version.
The BPCIA is complex and its provisions continue to be interpreted and implemented by the FDA and U.S. courts. As a result, the ultimate impact, implementation and implications of the BPCIA are subject to uncertainty and could compromise the future commercial prospects for our biological products. Moreover, it is not yet clear the extent to which a biosimilar, once approved, may be substituted for any one of our reference products in a way that is similar to traditional generic substitution for pharmaceutical products; this will depend on a number of marketplace and regulatory factors that are still developing at both the federal and state levels of government.
Failure to obtain marketing approval in foreign jurisdictions would prevent our product candidates from being marketed abroad, and any approval we are granted for our product candidates in the United States would not assure approval of product candidates in foreign jurisdictions.
In order to market and sell any product candidate that we may develop in the E.U., Canada and many other jurisdictions, we or our third-party licensees or collaborators must obtain separate marketing approvals and comply with numerous and varying regulatory requirements. The approval procedure varies among countries and can involve additional testing. The time required to obtain approval may differ substantially from that required to obtain FDA approval. The regulatory approval process outside the United States generally includes all of the risks associated with obtaining FDA approval. In addition, in many countries outside the United States it is required that the product be approved for reimbursement before the product can be sold in that country. We or these third parties may not obtain approvals from regulatory authorities outside the United States, including Health Canada, or the European Commission, on a timely basis, if at all. Approval by the FDA does not ensure approval by regulatory authorities in other countries or jurisdictions, and approval by one regulatory authority outside the United States does not ensure approval by regulatory authorities in other countries or jurisdictions or by the FDA. We may not be able to file for marketing approvals and may not receive necessary approvals to commercialize our products in any market. If we are unable to obtain approval of our product candidates by regulatory authorities in Canada, the E.U. or other jurisdictions, the commercial prospects of our product candidates may be significantly diminished and our business prospects could decline.
Even if we, or our third-party licensees or collaborators, obtain marketing approvals for our product candidates, the terms of those approvals, ongoing regulations and post-marketing restrictions may limit how we, or they, manufacture and market our products, which could materially impair our ability to generate revenue.
Once marketing approval has been granted, an approved product and its manufacturer and marketer are subject to ongoing review and extensive regulation. We, and any collaborators we may have in the future, must therefore comply with requirements concerning advertising and promotion for any of our products for which we or they obtain marketing approval. Promotional communications with respect to prescription products are subject to a variety of legal and regulatory restrictions and must be consistent with the information in the product’s approved labeling. Thus, if any product candidate that we may develop receives marketing approval, the accompanying label may limit the approved use of our product, which could limit sales of the product.

In addition, manufacturers of approved products and those manufacturers’ facilities are required to comply with extensive FDA requirements, including ensuring that quality control and manufacturing procedures conform to cGMPs, which include requirements relating to quality control and quality assurance as well as the corresponding maintenance of records and documentation and reporting requirements. We, our contract manufacturers, our future collaborators and their contract manufacturers will also be subject to other regulatory requirements, including submissions of safety and other post-marketing information and reports, registration and listing requirements, requirements regarding the distribution of samples to physicians, recordkeeping, and potentially costly post-marketing studies or other clinical trials and surveillance to monitor the safety or efficacy of the product such as the requirement to implement a risk evaluation and mitigation strategy.
Accordingly, assuming we receive marketing approval for one or more of our product candidates, we and our contract manufacturers will continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production, product surveillance and quality control. If we are not able to comply with post-approval regulatory requirements, we could have the marketing approvals for our products withdrawn by regulatory authorities and our ability to market any future products could be limited, which could adversely affect our ability to achieve or sustain profitability. Thus, the cost of compliance with post-approval regulations may have a negative effect on our operating results and financial condition.
Any product candidate for which we obtain marketing approval will be subject to a strict enforcement of post-marketing requirements and we could be subject to substantial penalties, including withdrawal of our product from the market, if we fail to comply with all regulatory requirements or if we experience unanticipated problems with our products, when and if any of them are approved.
Any product candidate for which we obtain marketing approval, along with the manufacturing processes, post-approval clinical data, labeling, advertising and promotional activities for such product, will be subject to continual requirements of and review by the FDA and other federal and state regulatory authorities. These requirements include, but are not limited to, restrictions governing promotion of an approved product, submissions of safety and other post-marketing information and reports, registration and listing requirements, cGMP requirements relating to manufacturing, quality control, quality assurance and corresponding maintenance of records and documents, and requirements regarding the distribution of samples to physicians and recordkeeping. The respective safety and efficacy profiles of our product candidates will continue to be closely monitored by the FDA and comparable foreign regulatory authorities, including Health Canada, if they are approved. If new safety information becomes available after approval of our product candidates, the FDA may require labeling changes or establishment of a REMS, and the FDA or comparable foreign regulatory authorities, including Health Canada, may require a similar strategy, impose significant restrictions on our product candidates’ indicated uses or marketing, or impose ongoing requirements for potentially costly post-approval studies or post-market surveillance.
The FDA and other federal and state agencies, including the DOJ closely regulate compliance with all requirements governing prescription drug products, including requirements pertaining to marketing and promotion of drugs in accordance with the provisions of the approved labeling and manufacturing of products in accordance with cGMP requirements. Violations of such requirements may lead to investigations alleging violations of the FDCA and other statutes, including the False Claims Act and other federal and state health care fraud and abuse laws as well as state consumer protection laws. In the United States, engaging in impermissible promotion of approved products for off-label uses can also subject us to false claims litigation under federal and state statutes, and other litigation and/or investigation, which can lead to civil and criminal penalties and fines and agreements that materially restrict the manner in which we promote or distribute our drug products. These false claims statutes include the federal civil False Claims Act, which allows any individual to bring a lawsuit against a pharmaceutical company on behalf of the federal government alleging submission of false or fraudulent claims, or causing to present such false or fraudulent claims, for payment by a federal program such as Medicare or Medicaid. If the government prevails in the lawsuit, the individual will share in any fines or settlement funds. These False Claims Act lawsuits against pharmaceutical companies have increased significantly in volume and breadth, leading to several substantial civil and criminal settlements based on certain sales practices promoting off-label drug uses. This increasing focus and scrutiny has increased the risk that a pharmaceutical company will have to defend a false claim action, pay settlement fines or restitution, agree to comply with burdensome reporting and compliance obligations, or risk being excluded from the Medicare, Medicaid and other federal and state healthcare programs. If we do not lawfully promote our approved products, we may become subject to such litigation and/or investigation and, if we are not successful in defending against such actions, those actions could compromise our ability to become profitable. Our failure to comply with all regulatory requirements, and later discovery of previously unknown adverse events or other problems with our products, manufacturers or manufacturing processes, may yield various results, including:
litigation involving patients taking our products;
restrictions on such products, manufacturers or manufacturing processes;
restrictions on the labeling or marketing of a product;

restrictions on product distribution or use;
requirements to conduct post-marketing studies or clinical trials;
warning letters or untitled letters;
withdrawal of the products from the market;
refusal to approve pending applications or supplements to approved applications that we submit;
recall of products;
fines, restitution or disgorgement of profits or revenues;
suspension or withdrawal of marketing approvals;
damage to relationships with any potential collaborators;
unfavorable press coverage and damage to our reputation;
refusal to permit the import or export of our products;
product seizure or detention; or
injunctions or the imposition of civil or criminal penalties.
The occurrence of any event or penalty described above may inhibit or preclude our ability to commercialize our product candidates and generate revenue.
Non-compliance by us or any future collaborator with regulatory requirements regarding safety monitoring or pharmacovigilance, and with requirements related to the development of products for the pediatric population, can also result in significant financial penalties.
Our failure to comply with data protection laws and regulations could lead to government enforcement actions and significant penalties against us, and adversely impact our operating results.
We are subject to U.S. data protection laws and regulations (i.e., laws and regulations that address privacy and data security) at both the federal and state levels. The legislative and regulatory landscape for data protection continues to evolve, and in recent years there has been an increasing focus on privacy and data security issues. Numerous federal and state laws, including state data breach notification laws, state health information privacy laws, and federal and state consumer protection laws, govern the collection, use, and disclosure of health-related and other personal information. In addition, we may obtain health information from third parties (e.g., healthcare providers who prescribe our products) that are subject to privacy and security requirements under Health Insurance Portability and Accountability Act of 1996, or HIPAA. Although we are not directly subject to HIPAA-other than potentially with respect to providing certain employee benefits-we could be subject to criminal penalties if we knowingly obtain or disclose individually identifiable health information maintained by a HIPAA-covered entity in a manner that is not authorized or permitted by HIPAA. Finally, a data breach affecting sensitive personal information, including health information, could result in significant legal and financial exposure and reputational damages that could potentially have an adverse effect on our business.
E.U. Member States, Switzerland and other countries have also adopted data protection laws and regulations, which impose significant compliance obligations. For example, the collection and use of personal health data in the E.U. is governed by the provisions of the E.U. Data Protection Directive, or the Directive. The Directive and the national implementing legislation of the E.U. Member States impose strict obligations and restrictions on the ability to collect, analyze and transfer personal data, including health data from clinical trials and adverse event reporting. In particular, these obligations and restrictions concern the consent of the individuals to whom the personal data relates, the information provided to the individuals, notification of data processing obligations to the competent national data protection authorities and the security and confidentiality of the personal data. Data protection authorities from the different E.U. Member States may interpret the Directive and national laws differently and impose additional requirements, which add to the complexity of processing personal data in the E.U.
Guidance on implementation and compliance practices are often updated or otherwise revised. For example, the E.U. Data Protection Directive prohibits the transfer of personal data to countries outside of the European Economic Area, or EEA, that are not considered by the European Commission to provide an adequate level of data protection. These countries include the United States.

The judgment by the Court of Justice of the E.U. in the Schrems case (Case C-362/14 Maximillian Schrems v. Data Protection Commissioner) determined the U.S.-E.U. Safe Harbor Framework, which was relied upon by many U.S. entities as a basis for transfer of personal data from the E.U. to the U.S., to be invalid. U.S. entities therefore, had only the possibility to rely on the alternate procedures for such data transfer provided in the E.U. Data Protection Directive.
On February 29, 2016, however, the European Commission announced an agreement with the U.S. Department of Commerce (DOC) to replace the invalidated Safe Harbor framework with a new E.U.-U.S “Privacy Shield”. On July 12, 2016, the European Commission adopted a decision on the adequacy of the protection provided by the Privacy Shield. The Privacy Shield is intended to address the requirements set out by the Court of Justice of the E.U. in its Schrems judgment by imposing more stringent obligations on companies, providing stronger monitoring and enforcement by the DOC and the Federal Trade Commission, and making commitments on the part of public authorities regarding access to information. U.S. companies have been able to certify to the DOC their compliance with the privacy principles of the Privacy Shield since August 1, 2016 and rely on the Privacy Shield certification to transfer of personal data from the E.U. to the U.S.
On September 16, 2016, the Irish privacy advocacy group Digital Rights Ireland brought an action for annulment of the European Commission decision on the adequacy of the Privacy Shield before the Court of Justice of the E.U. (Case T-670/16). Case T-670/16 is still pending. If the Court of Justice of the E.U. invalidates the Privacy Shield, it will no longer be possible to rely on the Privacy Shield certification to transfer personal data from the E.U. to entities in the U.S. Adherence to the Privacy Shield is not, however, mandatory. U.S.-based companies are permitted to rely either on their adherence to the E.U.-US Privacy Shield or on the other authorized means and procedures to transfer personal data provided by the E.U. Data Protection Directive.
In addition, the E.U. Data Protection Regulation, intended to replace the current E.U. Data Protection Directive entered into force on May 24, 2016 and will apply from May 25, 2018. The E.U. Data Protection Regulation will introduce new data protection requirements in the E.U. and substantial fines for breaches of the data protection rules. The E.U. Data Protection Regulation will increase our responsibility and liability in relation to personal data that we process, and we may be required to put in place additional mechanisms to ensure compliance with the new data protection rules.

Our failure to comply with these laws, or changes in the way in which these laws are implemented, could lead to government enforcement actions and significant penalties against us, and adversely impact our business.
Our relationships with customers and third-party payors may be subject, directly or indirectly, to applicable anti-kickback, fraud and abuse, false claims, transparency, health information privacy and security, and other healthcare laws and regulations, which could expose us to criminal sanctions, civil penalties, contractual damages, reputational harm, administrative burdens and diminished profits and future earnings.
Healthcare providers, physicians and third-party payors in the United States and elsewhere will play a primary role in the recommendation and prescription of any product candidates for which we obtain marketing approval. Our future arrangements with third-party payors and customers may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and relationships through which we market, sell and distribute any products for which we obtain marketing approval. In addition, we may be subject to transparency laws and patient privacy regulation by U.S. federal and state governments and by governments in foreign jurisdictions in which we conduct our business. The applicable federal, state and foreign healthcare laws and regulations that may affect our ability to operate include:
the federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or providing remuneration, directly or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, order or recommendation or arranging of, any good or service, for which payment may be made under a federal healthcare program such as Medicare and Medicaid;
the federal False Claims Act imposes criminal and civil penalties, including through civil whistleblower or qui tam actions, against individuals or entities for, among other things, knowingly presenting, or causing to be presented, false or fraudulent claims for payment by a federal healthcare program or making a false statement or record material to payment of a false claim or avoiding, decreasing or concealing an obligation to pay money to the federal government, with potential liability including mandatory treble damages and significant per-claim penalties, currently set at $5,500 to $11,000 per false claim;
HIPAA, which imposes criminal and civil liability for executing a scheme to defraud any healthcare benefit program or knowingly and willfully falsifying, concealing or covering up a material fact or making any

materially false, fictitious or fraudulent statement or representation, or making or using any false writing or document knowing the same to contain any materially false, fictitious or fraudulent statement or entry relating to the delivery of or payment for healthcare benefits, items or services;
the federal Physician Payments Sunshine Act requires applicable manufacturers of covered products to report payments and other transfers of value to physicians and teaching hospitals;
HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009, and their respective implementing regulations, which imposes obligations, including mandatory contractual terms, on covered healthcare providers, health plans and healthcare clearinghouses, as well as their business associates, with respect to safeguarding the privacy, security and transmission of individually identifiable health information; and
analogous state and foreign laws and regulations, such as state anti-kickback and false claims laws and transparency statutes, which may apply to sales or marketing arrangements and claims involving healthcare items or services reimbursed by non-governmental third-party payors, including private insurers; state and foreign laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government or otherwise restrict payments that may be made to healthcare providers; state and foreign laws that require drug manufacturers to report information related to payments and other transfers of value to physicians and other healthcare providers or marketing expenditures; and state and foreign laws governing the privacy, security, collection, use and disclosure of health information, including state data breach notification laws, state health information privacy laws, and federal and state consumer protection laws (e.g., Section 5 of the FTC Act), many of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.
Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations may involve substantial costs. It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, including, without limitation, damages, fines, imprisonment, exclusion from participation in government funded healthcare programs, such as Medicare and Medicaid, and the curtailment or restructuring of our operations. If any of the physicians or other healthcare providers or entities with whom we expect to do business is found to be not in compliance with applicable laws, it may be subject to criminal, civil or administrative sanctions, including exclusions from participation in government funded healthcare programs.
Current and future legislation may increase the difficulty and cost for us and any collaborators to obtain marketing approval of our product candidates and affect the prices we, or they, may obtain.
In the United States and some foreign jurisdictions, there have been a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could, among other things, prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability, or the ability of any collaborators, to profitably sell any products for which we, or they, obtain marketing approval. We expect that current laws, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional downward pressure on the price that we, or any collaborators, may receive for any approved products.
In the United States, the Medicare Modernization Act, established the Medicare Part D program and generally authorized prescription drug plan sponsors to impose limits on the number of covered drugs under their plans in a therapeutic class. The Medicare Modernization Act, including its cost reduction initiatives, could decrease the coverage and reimbursement rate that we may receive for any of our product candidates, if approved. CMS, the agency that runs the Medicare program, also may revise reimbursement and implement coverage restrictions. Cost reduction initiatives and changes in coverage could decrease utilization of and reimbursement for any approved products, which would then affect the price we can receive. Private payors often follow Medicare coverage policy and payment limitations in setting their own reimbursement rates. Therefore, any reduction in reimbursement from federal legislation or regulation may lead to similar reductions in private payor reimbursement.
In addition, in March 2010, President Obama signed into law the Affordable Care Act. Among the provisions of the Affordable Care Act of potential importance to our business and our product candidates are the following:
an annual, non-deductible fee on any entity that manufactures or imports specified branded prescription products and biologic agents;

an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program;
a new methodology by which average manufacturer price is calculated and reported by manufacturers for products that are inhaled, infused, instilled, implanted or injected and not generally dispensed through retail community pharmacies;
expansion of healthcare fraud and abuse laws, including the civil False Claims Act and the federal Anti-Kickback Statute, new government investigative powers and enhanced penalties for noncompliance;
a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 50% point-of-sale discounts off negotiated prices of applicable brand products to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient products to be covered under Medicare Part D;
extension of manufacturers’ Medicaid rebate liability from fee-for-service Medicaid utilization to include the utilization of Medicaid managed care organizations as well;
expansion of eligibility criteria for Medicaid programs;
expansion of the entities eligible for discounts under the Public Health Service 340B pharmaceutical pricing program;
new requirements to report certain financial arrangements with physicians and teaching hospitals;
a new requirement to annually report product samples that manufacturers and distributors provide to physicians;
a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research;
a new IPAB which has authority to recommend certain changes to the Medicare program to reduce expenditures by the program that could result in reduced payments for prescription products; and
establishment of the Center for Medicare and Medicaid Innovation within CMS to test innovative payment and service delivery models.
Other legislative changes have been proposed and adopted since the Affordable Care Act was enacted. These changes include the Budget Control Act of 2011, which, among other things, led to aggregate reductions to Medicare payments to providers of up to 2% per fiscal year that started in 2013 and, due to subsequent legislation, will continue until 2025. In addition, the American Taxpayer Relief Act of 2012, among other things, reduced Medicare payments to several types of providers and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. These new laws may result in additional reductions in Medicare and other healthcare funding and otherwise affect the prices we may obtain for any of our product candidates for which regulatory approval is obtained, which could have a material adverse effect on our financial operations.
Additional legislative changes, FDA or CMS regulations, guidance or interpretations could be adopted, which may impact the marketing approvals and reimbursement of our product candidates. For example, in November 2015, the U.S. House of Representatives formed an Affordable Drug Pricing Task Force to advance legislation intended to control pharmaceutical drug costs and investigate pharmaceutical drug pricing, and the U.S. Senate has requested information from certain pharmaceutical companies in connection with an investigation into pharmaceutical drug pricing practices. If healthcare policies or reforms intended to curb healthcare costs are adopted or if we experience negative publicity with respect to pricing of our products or the pricing of pharmaceutical drugs generally, the prices that we charge for any approved products may be limited, our commercial opportunity may be limited and/or our revenues from sales of our products may be negatively impacted.
Legislative and regulatory changes regarding the Affordable Care Act remain possible and appear likely in the 115th United States Congress and under the Trump Administration We expect that the Affordable Care Act, as currently enacted or may be amended in the future, as well as other healthcare reform measures that may be adopted in the future, may result in additional reductions in Medicare and other healthcare funding, more rigorous coverage criteria, new payment methodologies and additional downward pressure on the price that we receive for any approved product. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability, or commercialize our products. Moreover, legislative and regulatory proposals have been made to expand post-approval requirements and restrict sales and promotional activities for pharmaceutical products. We cannot be sure whether additional legislative changes will be enacted in the U.S. or outside of the U.S., or whether the FDA or CMS

regulations, guidance or interpretations will be changed, or what the impact of such changes on the marketing approvals of our product candidates, if any, may be.
If we participate in the Medicaid drug rebate program and fail to comply with our reporting and payment obligations under that or other governmental pricing programs, we could be subject to additional reimbursement requirements, penalties, sanctions and fines, which could have a material adverse effect on our business, financial condition, results of operations and growth prospects.
If we participate in the Medicaid drug rebate program, we will have certain price reporting obligations to the Medicaid drug rebate program, and we may have obligations to report ASP figures to the Medicare program. Under the Medicaid drug rebate program, we would be required to pay a rebate to each state Medicaid program for our covered outpatient drugs that are dispensed to Medicaid beneficiaries and paid for by a state Medicaid program as a condition of having federal funds being made available to the states for our drugs under Medicaid and Medicare Part B. Those rebates are based on pricing data reported by us on a monthly and quarterly basis to CMS. These data include AMP and, in the case of innovator products, the best price for each drug which, in general, represents the lowest price available from the manufacturer to any entity in the United States in any pricing structure, calculated to include all sales and associated rebates, discounts and other price concessions.
Federal law also requires that a company that participates in the Medicaid drug rebate program report ASP information each quarter to CMS for certain categories of drugs that are paid under Part B of the Medicare program. Manufacturers calculate ASP based on a statutorily defined formula and interpretations of the statute by CMS. CMS uses these submissions to determine payment rates for drugs under Medicare Part B and the resulting Medicare payment rate.
Federal law requires that any company that participates in the Medicaid drug rebate program also participate in the Public Health Service’s 340B drug pricing program in order for federal funds to be available for the manufacturer’s drugs under Medicaid and Medicare Part B. The 340B drug pricing program requires participating manufacturers to agree to charge statutorily-defined covered entities no more than the 340B “ceiling price” for the manufacturer’s covered outpatient drugs. In addition, in order to be eligible to have its products paid for with federal funds under the Medicaid and Medicare Part B programs and purchased by certain federal agencies and grantees, a manufacturer also must participate in the FSS pricing program, established by Section 603 of the Veterans Health Care Act of 1992. Under this program, the manufacturer is obligated to make its “covered drugs” (biologics or innovator drugs) available for procurement on an FSS contract and charge a price to four federal agencies, Department of Veterans Affairs, Department of Defense, Public Health Service, and Coast Guard, that is no higher than the statutory federal ceiling price. The requirements under the 340B and FSS programs could reduce the revenue we may generate from any products that are commercialized in the future and could adversely affect our business and operating results.
Pricing and rebate calculations vary among products and programs. The calculations are complex and are often subject to interpretation by manufacturers, governmental or regulatory agencies, and the courts. The Medicaid rebate amount for each manufacturer is computed each quarter based on the manufacturer’s submission to CMS of its current AMP and, in the case of innovator products, best price figures, for the quarter. If we participate in the Medicaid drug rebate program and become aware that our reporting for a prior quarter was incorrect, or has changed, we will be obligated to resubmit the corrected data for a period not to exceed twelve quarters from the quarter in which the data originally were due. Such restatements and recalculations would increase our costs for complying with the laws and regulations governing the Medicaid drug rebate program. Any corrections to our rebate calculations could result in an overage or underage in our rebate liability for past quarters, depending on the nature of the correction. Price recalculations also may affect the ceiling price at which we would be required to offer our products to certain covered entities, such as safety-net providers, under the 340B drug discount program.
If we participate in the Medicaid drug rebate program or our products are covered under Medicare Part B, we will be liable for errors associated with our submission of pricing data. In addition to retroactive rebates and the potential for 340B program refunds, if we are found to have knowingly submitted false AMP, ASP, or best price information to the government, we may be liable for civil monetary penalties per item of false information. If we are found to have made a misrepresentation in the reporting of our ASP, the Medicare statute provides for civil monetary penalties for each misrepresentation for each day in which the misrepresentation was applied. Our failure to submit monthly/quarterly AMP, ASP, and best price data on a timely basis could result in a civil monetary penalty per day for each day the information is late beyond the due date. Such failure also could be grounds for CMS to terminate our Medicaid drug rebate agreement, pursuant to which we would participate in the Medicaid program. In the event that CMS terminates our rebate agreement, federal payments may not be available under Medicaid or Medicare Part B for our covered outpatient drugs that we are able to successfully commercialize.

Laws and regulations governing any international operations we may have in the future may preclude us from developing, manufacturing and selling certain products outside of the United States and require us to develop and implement costly compliance programs.
If we expand our operations outside of the United States, we must dedicate additional resources to comply with numerous laws and regulations in each jurisdiction in which we plan to operate. The FCPA prohibits any U.S. individual or business from paying, offering, authorizing payment or offering of anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the United States to comply with certain accounting provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries, and to devise and maintain an adequate system of internal accounting controls for international operations.
Compliance with the FCPA is expensive and difficult, particularly in countries in which corruption is a recognized problem. In addition, the FCPA presents particular challenges in the pharmaceutical industry, because, in many countries, hospitals are operated by the government, and doctors and other hospital employees are considered foreign officials. Certain payments to hospitals in connection with clinical trials and other work have been deemed to be improper payments to government officials and have led to FCPA enforcement actions.
Various laws, regulations and executive orders also restrict the use and dissemination outside of the United States, or the sharing with certain non-U.S. nationals, of information classified for national security purposes, as well as certain products and technical data relating to those products. If we expand our presence outside of the United States, it will require us to dedicate additional resources to comply with these laws, and these laws may preclude us from developing, manufacturing, or selling certain products and product candidates outside of the United States, which could limit our growth potential and increase our development costs.
The failure to comply with laws governing international business practices may result in substantial civil and criminal penalties and suspension or debarment from government contracting. The Securities and Exchange Commission, or SEC, also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA’s accounting provisions.
The results of the United Kingdom’s referendum on withdrawal from the E.U. may have a negative effect on global economic conditions, financial markets and our business.
In June 2016, a majority of voters in the United Kingdom elected to withdraw from the E.U. in a national referendum. The government of the United Kingdom is expected to initiate the formal withdrawal procedure by late March 2017. The procedure involves a two-year negotiation period in which the United Kingdom and the E.U. must conclude an agreement setting out the terms of the United Kingdom's withdrawal and the arrangements for the United Kingdom's future relationship with the E.U. This negotiation period could be extended by a unanimous decision of the European Council, in agreement with the United Kingdom. The referendum has created significant uncertainty about the future relationship between the United Kingdom and the E.U., including with respect to the laws and regulations that will apply as the United Kingdom determines which E.U. laws to replace or replicate in the event of a withdrawal. From a regulatory perspective, the United Kingdom's withdrawal could bear significant complexity and risks. A basic requirement related to the grant of a marketing authorization for a medicinal product in the E.U. is that the applicant is established in the E.U. Following the withdrawal of the United Kingdom from the E.U., marketing authorizations previously granted to applicants established in the United Kingdom may no longer be valid. Moreover, depending upon the exact terms of the United Kingdom's withdrawal, there is an arguable risk that the scope of a marketing authorization for a medicinal product granted by the European Commission pursuant to the centralized procedure would not, in the future, include the United Kingdom. In these circumstances, an authorization granted by the United Kingdom's competent authorities would always be required to place medicinal products on the United Kingdom market. In addition, the laws and regulations that will apply after the United Kingdom withdraws from the E.U. would affect the manufacturing sites that hold a manufacturing authorization issued by the United Kingdom competent authorities. Our capability to rely on these manufacturing sites for products intended for the E.U. market would also depend upon the exact terms of the United Kingdom's withdrawal. The referendum has also given rise to calls for the governments of other E.U. Member States to consider withdrawal from the E.U. These developments, or the perception that any of them could occur, have had and may continue to have a material adverse effect on global economic conditions and the stability of global financial markets, and may significantly reduce global market liquidity and restrict the ability of key market participants to operate in certain financial markets. Any of these factors could significantly increase the complexity of our activities in the E.U. and in the United Kingdom, could depress our economic activity and restrict our access to capital, which could have a material adverse effect on our business, financial condition and results of operations and reduce the price of our securities.

If we or our third-party manufacturers fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur significant costs.
We and our third-party manufacturers are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the handling, use, storage, treatment and disposal of hazardous materials and wastes. From time to time and in the future, our operations may involve the use of hazardous and flammable materials, including chemicals and biological materials, and produce hazardous waste products. We generally contract with third parties for the disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting from our use of hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil or criminal fines and penalties for failure to comply with such laws and regulations.
Although we maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from the use of hazardous materials, this insurance may not provide adequate coverage against potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive materials.
In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or future laws and regulations may impair our research, development or production efforts. Our failure to comply with these laws and regulations also may result in substantial fines, penalties or other sanctions.
Further, with respect to the operations of our third-party contract manufacturers, it is possible that if they fail to operate in compliance with applicable environmental, health and safety laws and regulations or properly dispose of wastes associated with our products, we could be held liable for any resulting damages, suffer reputational harm or experience a disruption in the manufacture and supply of our product candidates or products.
Risks Related to Our Intellectual Property
If we are unable to obtain and maintain patent protection for our technology and products, or if our licensors are unable to obtain and maintain patent protection for the technology or products that we license from them, or if the scope of the patent protection obtained is not sufficiently broad, our competitors could develop and commercialize technology and products similar or identical to ours, and our ability to successfully commercialize our technology and products may be impaired.
Our success depends in large part on our and our licensors’ ability to obtain and maintain patent protection in the United States and other countries with respect to Vicineum and our other proprietary technology and product candidates. We and our licensors have sought to protect our proprietary position by filing patent applications in the United States and abroad related to our novel technologies and product candidates. The patent prosecution process is expensive and time-consuming, and we may not be able to file and prosecute all necessary or desirable patent applications in jurisdictions of interest at a reasonable cost or in a timely manner. It is also possible that we will fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection. Moreover, in some circumstances, we do not have the right to control the preparation, filing and prosecution of patent applications, or to maintain the patents, covering technology that we license from third parties. Therefore, these patents and applications may not be prosecuted and enforced in a manner consistent with the best interests of our business. If such licensors fail to maintain such patents, or lose rights to those patents, the rights we have licensed may be reduced or eliminated.
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The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and has in recent years been the subject of much litigation. As a result, the issuance, scope, validity, enforceability and commercial value of our and our licensors’ patent rights are highly uncertain. Our and our licensors’ pending and future patent applications may not result in patents being issued which protect our technology or products or which effectively prevent others from commercializing competitive technologies and products. In addition, the laws of non-US countries may not protect our rights to the same extent as the laws of the United States. For example, European patent law restricts the patentability of methods of treatment of the human body more than United States law does. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after filing, or in some cases not at all. Therefore, we cannot know with certainty whether we or our licensors were the first to make the inventions claimed in our owned or licensed patents or pending patent applications, or that we or our licensors were the first to file for patent protection of such inventions. As a result, the issuance, scope, validity, enforceability and commercial value of our owned or licensed patent rights are highly uncertain. Our pending and future patent applications may not result in patents being issued which protect our technology or products, in whole or in part, or which effectively prevent others from commercializing competitive technologies and products. In particular, during prosecution of any patent application, the issuance of any patents based on the application may depend upon our ability to generate additional pre-clinical or clinical data that support the patentability of our proposed claims. We may not be able to generate sufficient additional data on a timely basis, or at all. Moreover, changes in either the patent laws or interpretation of the patent laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent protection.
Moreover, we may be subject to a third-party preissuance submission of prior art to the USPTO or become involved in opposition, derivation, reexamination, inter partes review, post-grant review or interference proceedings challenging our patent rights or the patent rights of others. An adverse determination in any such submission, proceeding or litigation could reduce the scope of, or invalidate, our patent rights, allow third parties to commercialize our technology or products and compete directly with us, without payment to us, or result in our inability to manufacture or commercialize products without infringing third-party patent rights. In addition, if the breadth or strength of protection provided by our patents and patent applications is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates. In addition, invalidation of our patent rights by third parties could jeopardize the anticipated revenue streams from current licensees.
Even if our owned and licensed patent applications issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors from competing with us or otherwise provide us with any competitive advantage. Our competitors may be able to circumvent our owned or licensed patents by developing similar or alternative technologies or products in a non-infringing manner.
The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our owned and licensed patents may be challenged in the courts or patent offices in the United States and abroad. Such challenges may result in loss of exclusivity or freedom to operate or in patent claims being narrowed, invalidated or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent protection of our technology and products. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. As a result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours.
We may not be able to protect our intellectual property rights throughout the world.
Filing, prosecuting and defending patents on Vicineum and our other product candidates and technologies throughout the world would be prohibitively expensive, and our or our licensors’ intellectual property rights in some countries outside the United States can be less extensive than those in the United States. In addition, the laws and practices of countries outside the United States do not protect intellectual property rights to the same extent as federal and state laws in the United States. Moreover, the intellectual property laws of the United States change over time. For example, several United States Supreme Court cases have redefined what is considered to be patentable subject matter. Consequently, we and our licensors may not be able to prevent third parties from practicing our and our licensors’ inventions in all countries inside or outside the United States, or from selling or importing products made using our and our licensors’ inventions in and into the United States or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products and may export infringing products to territories where we or our licensors have patent protection, but where enforcement is not as strong as in the United States. These products may compete with our products in jurisdictions where we do not have any issued patents and our patent claims or other intellectual property rights may not be effective or sufficient to prevent them from so competing.
Many companies have encountered significant problems in protecting and defending intellectual property rights in non-US jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of
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patents and other intellectual property protection, particularly those relating to biopharmaceuticals, which could make it difficult for us to stop the infringement of our or our licensor’s patents or marketing of competing products in violation of our proprietary rights generally in those countries. Proceedings to enforce our patent rights in non-US jurisdictions could result in substantial cost and divert our efforts and attention from other aspects of our business, could put our and our licensors’ patents at risk of being invalidated or being interpreted narrowly and put our and our licensors’ patent applications at risk of not issuing and could provoke third parties to assert claims against us or our licensors. We or our licensors may not prevail in any lawsuits that we or our licensors initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful.
The laws of certain countries outside of the US may not protect our rights to the same extent as the laws of the United States, and such laws may also be subject to change. For example, methods of treatment and manufacturing processes may not be patentable in certain jurisdictions, and the requirements for patentability may differ in certain countries, particularly developing countries. Furthermore, generic and/or biosimilar product manufacturers or other competitors may challenge the scope, validity or enforceability of our or our licensors’ patents, requiring us or our licensors to engage in complex, lengthy and costly litigation or other proceedings.
Generic or biosimilar product manufacturers may develop, seek approval for, and generic versions or biosimilar versions, respectively, of our products. The FDA has published several guidance documents on biosimilar product development. If a biosimilar product is also found to be interchangeable with a reference product, it may be substituted for the reference product. Complexities associated with the larger, and often more complex, structures of biological products, as well as the process by which such products are manufactured, pose significant hurdles to implementation, which are still being worked out by the FDA. If any of our product candidates are approved by the FDA, the approval of a biologic product biosimilar to or interchangeable with one of our products could have a material impact on our business. In particular, a biosimilar could be significantly less costly to bring to market and priced significantly lower than our products, if approved by the FDA.
Many countries, including EU countries, have compulsory licensing laws under which a patent owner may be compelled under certain circumstances to grant licenses to third parties. In those countries, we and our licensors may have limited remedies if patents are infringed or if we or our licensors are compelled to grant a license to a third party, which could materially diminish the value of those patents. This could limit our potential revenue opportunities. Accordingly, our and our licensors’ efforts to enforce intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we own or license.
We have not yet registered our trademarks in all of our potential markets, and failure to secure those registrations could adversely affect our business.
Our future trademark applications may not be allowed for registration, and our registered trademarks may not be maintained or enforced. During trademark registration proceedings, we may receive rejections from the USPTO or other applicable non-US intellectual property offices. Although we are given an opportunity to respond to those rejections, we may be unable to overcome such rejections, or have to expend additional resources to secure registrations, such as commencing cancellation proceedings against third-party trademark registrations to remove them as obstacles to our trademark applications. In addition, in the USPTO and in comparable agencies in many non-US jurisdictions, third parties are given an opportunity to oppose pending trademark applications and to seek to cancel registered trademarks. Opposition or cancellation proceedings may be filed against our trademarks, and our trademarks may not survive such proceedings. If we do not secure registrations for our trademarks, we may encounter more difficulty in enforcing them against third parties than we otherwise would.
We depend on our license agreements with Zurich, Micromet and XOMA, and if we cannot meet the requirements under the agreements, we could lose important rights to Vicineum, which could have material adverse effect on our business.
We have an exclusive license agreement with Zurich. Pursuant to the Zurich License Agreement, we were granted an exclusive license, with the right to sublicense, under certain patents primarily relating, in part, to our targeting agents, EpCAM chimera and immunoconjugates (including aspects of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and Vicineum for the treatment of SCCHN) and methods of use, to make, use, sell and import products that would otherwise infringe such patents in the field of the treatment, stasis and palliation of disease in humans. If we fail to meet our obligations under the Zurich License Agreement, Zurich may have the right to terminate our license, and upon the effective date of such termination, our right to use the licensed Zurich patent rights would end. To the extent such licensed technology or patent rights relate to our product candidates, we would expect to exercise all rights and remedies available to us, including attempting to cure any breach by us, and otherwise seek to preserve our rights under the patent rights licensed to us, but we may not be able to do so in a timely manner, at an acceptable cost to us or at all. Any uncured, material breach under the Zurich License Agreement could result in our loss of rights to practice the patent rights licensed to us under the Zurich License Agreement, and to the extent such patent rights and other technology relate to our product candidates or other of our compounds, it could have a material adverse effect on our commercialization efforts for our product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and Vicineum for the treatment of SCCHN.
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We also have a license agreement with Micromet, which grants us non-exclusive rights, with certain sublicense rights, for know-how and patents allowing exploitation of certain single chain antibody products. If we fail to meet our obligations under the Micromet License Agreement, Micromet may have the right to terminate our license, and upon the effective date of such termination, our right to use the licensed Micromet patent rights would end. To the extent such licensed technology or patent rights relate to our product candidates, we would expect to exercise all rights and remedies available to us, including attempting to cure any breach by us, and otherwise seek to preserve our rights under the patent rights licensed to us, but we may not be able to do so in a timely manner, at an acceptable cost to us or at all. Any uncured, material breach under the Micromet License Agreement could result in our loss of rights to practice the patent rights licensed to us under the Micromet License Agreement, and to the extent such patent rights and other technology relate to our product candidates or other of our compounds, it could have a material adverse effect on our commercialization efforts for our product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and Vicineum for the treatment of SCCHN.
We also have a license agreement with XOMA, which grants us non-exclusive rights, with certain sublicense rights, to certain XOMA patent rights and know-how related to certain expression technology, including plasmids, expression strains, plasmid maps and production systems. If we fail to meet our obligations under the XOMA License Agreement, XOMA may have the right to terminate our license, and upon the effective date of such termination, our right to use the licensed XOMA patent rights and related know-how would end. To the extent such licensed technology or patent rights relate to our product candidates, we would expect to exercise all rights and remedies available to us, including attempting to cure any breach by us, and otherwise seek to preserve our rights under the patent rights licensed to us, but we may not be able to do so in a timely manner, at an acceptable cost to us or at all. Any uncured, material breach under the XOMA License Agreement could result in our loss of rights to practice the patent rights licensed to us under the XOMA License Agreement, and to the extent such patent rights and other technology relate to our product candidates or other of our compounds, it could have a material adverse effect on our commercialization efforts for our product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and Vicineum for the treatment of SCCHN.
We may become involved in lawsuits to protect or enforce our patents or other intellectual property, which could be expensive, time consuming and unsuccessful.
Competitors may infringe our issued patents or other intellectual property. To counter infringement or unauthorized use, we may be required to file infringement claims, which can be expensive and time consuming. Any claims we assert against perceived infringers could provoke these parties to assert counterclaims against us alleging that we infringe their patents, trademarks or other intellectual property. In addition, in a patent infringement proceeding, a court may decide that a patent of ours is invalid or unenforceable, in whole or in part, construe the patent’s claims narrowly or refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation proceeding could put one or more of our patents at risk of being invalidated or interpreted narrowly. In a trademark infringement proceeding, we could be enjoined from continued use of a trademark deemed to be infringing and forced to rebrand product packaging, product inserts, market and advertising materials, resulting in a loss of sales and established goodwill in that name or mark. In addition, we could be found liable for monetary damages, including treble damages and attorneys’ fees if we are found to have willfully infringed a trademark.
Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. Even if resolved in our favor, litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses and could distract our technical and management personnel from their normal responsibilities. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments and if securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock.
Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain and could have a material adverse effect on the success of our business.
Our commercial success depends upon our ability, and the ability of our partners, to develop, manufacture, market and sell our product candidates and use our proprietary technologies without infringing the proprietary rights of third parties. There is considerable intellectual property litigation in the biotechnology and pharmaceutical industries. We may become party to, or threatened with, future adversarial proceedings or litigation regarding intellectual property rights with respect to our products and technology, including interference or derivation proceedings before the USPTO. The risks of being involved in such litigation and proceedings may increase as our product candidates near commercialization and as we gain the greater visibility associated with being a public company. Third parties may assert infringement claims against us based on existing patents or patents that may be granted in the future. We may not be aware of all such intellectual property rights potentially relating to our product candidates and their uses. Thus, we do not know with certainty that any product candidate, or our commercialization thereof, does not and will not infringe or otherwise violate any third party’s intellectual property.
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If we are found to infringe a third party’s intellectual property rights, we could be required to obtain a license from such third party to continue developing and marketing our products and technology. However, we may not be able to obtain any required license on commercially reasonable terms or at all. Even if we were able to obtain a license, it could be non-exclusive, thereby giving our competitors access to the same technologies licensed to us. We could be forced, including by court order, to cease commercializing the infringing technology or product. In addition, we could be found liable for monetary damages, including treble damages and attorneys’ fees if we are found to have willfully infringed a patent. A finding of infringement could prevent us from commercializing our product candidates or force us to cease some of our business operations. Claims that we have misappropriated the confidential information or trade secrets of third parties could have a similar negative impact on our business.
We may be subject to claims by third parties asserting that our employees, consultants, independent contractors or we have misappropriated their intellectual property, or claiming ownership of what we regard as our own intellectual property.
Many of our employees and our licensors’ employees, including our senior management, were previously employed at universities, medical institutions or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Some of these employees, including members of our senior management, executed proprietary rights, non-disclosure and non-competition agreements, or similar agreements, in connection with such previous employment. Although we try to ensure that our employees do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that these employees or we have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such employee’s former employer. Litigation may be necessary to defend against these claims.
In addition, while it is our policy to require our employees and contractors who may be involved in the development of intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who in fact develops intellectual property that we regard as our own. Our and their assignment agreements may not be self-executing or may be breached, and we may be forced to bring claims against third parties, or defend claims they may bring against us, to determine the ownership of what we regard as our intellectual property.
If we fail in prosecuting or defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel. Even if we are successful in prosecuting or defending against such claims, litigation could result in substantial costs and be a distraction to management.
If we are unable to protect the confidentiality of our trade secrets, our business and competitive position would be harmed.
In addition to seeking patents for some of our technology and product candidates, we also rely on trade secrets, including unpatented know-how, technology and other proprietary information, to maintain our competitive position. We seek to protect these trade secrets, in part, by entering into non-disclosure and confidentiality agreements with parties who have access to them, such as our employees, corporate collaborators, outside scientific collaborators, contract manufacturers, consultants, advisors and other third parties. We also enter into confidentiality and invention or patent assignment agreements with our employees and consultants. Despite these efforts, any of these parties may breach the agreements and disclose our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. Enforcing a claim that a party illegally disclosed or misappropriated a trade secret is difficult, expensive and time-consuming, and the outcome is unpredictable. In addition, some courts inside and outside the United States are less willing or unwilling to protect trade secrets. If any of our trade secrets were to be lawfully obtained or independently developed by a competitor, we would have no right to prevent them, or those to whom they communicate it, from using that technology or information to compete with us. If any of our trade secrets were to be disclosed to or independently developed by a competitor, our competitive position would be harmed.
Intellectual property rights do not necessarily address all potential threats to our competitive advantage.
The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations, and may not adequately protect our business, or permit us to maintain our competitive advantage. The following examples are illustrative:
others may be able to make product candidates that are the same as or similar to our product candidates but that are not covered by the claims of the patents that we own or have licensed;
biosimilar product manufacturers may develop, seek approval for, and launch biosimilar versions of our products, which could be significantly less costly to bring to market and priced significantly lower than our products;
we or our licensors might not have been the first inventor to file patent applications covering certain of our inventions;
others may design around our intellectual property rights or independently develop similar or alternative technologies or duplicate any of our technologies without infringing or misappropriating our intellectual property rights;
it is possible that our pending patent applications will not lead to issued patents with claims that cover our products or even issued patents;
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issued patents that we own or have exclusively licensed may not provide us with any competitive advantages, or may be held invalid or unenforceable as a result of legal challenges;
our competitors might conduct research and development activities in the United States and other countries that provide a safe harbor from patent infringement claims for certain research and development activities, as well as in countries where we do not have patent rights and then use the information learned from such activities to develop competitive products for sale in our major commercial markets;
we may not develop additional proprietary technologies or product candidates that are patentable; and
the intellectual property rights of others may have an adverse effect on our business.
Risks Related to Regulatory Compliance
If and when we commercialize, our relationships with customers and third-party payors may be subject, directly or indirectly, to applicable anti-kickback, fraud and abuse, false claims, transparency, and other healthcare laws and regulations, which could expose us to criminal sanctions, civil penalties, contractual damages, reputational harm, administrative burdens and diminished profits and future earnings.
Healthcare providers, physicians and third-party payors in the United States and elsewhere will play a primary role in the recommendation and prescription of any product candidate for which we obtain marketing approval. Our future arrangements with third-party payors and customers may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and relationships through which we market, sell and distribute any products for which we obtain marketing approval. In addition, we may be subject to transparency laws and patient privacy regulation by United States federal and state governments and by governments in non-US jurisdictions in which we conduct our business.
For a full discussion of these laws, see the subsection titled “Other Healthcare Laws and Compliance Requirements” in Item 1.
Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations may involve substantial costs. It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, including, without limitation, damages, fines, imprisonment, exclusion from participation in government funded healthcare programs, such as Medicare and Medicaid, and the curtailment or restructuring of our operations. If any of the physicians or other healthcare providers or entities with whom we expect to do business is found to be not in compliance with applicable laws, it may be subject to criminal, civil or administrative sanctions, including exclusions from participation in government funded healthcare programs.
Current and future legislation may increase the difficulty and cost for us to obtain marketing approval of our product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and affect the prices we may obtain.
In the United States and some non-US jurisdictions, there have been, and continue to be, a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could, among other things, prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability, or the ability of any commercialization partners, to profitably sell any products for which we, or they, obtain marketing approval. We expect that current laws, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional downward pressure on the price that we, or any commercialization partners, may receive for any approved products.
CMS, the agency that administers the Medicare and Medicaid programs, may revise reimbursement and implement coverage restrictions. Any reduction in reimbursement from Medicare, Medicaid or other government programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability or commercialize our products.
In addition, in March 2010, President Obama signed into law the ACA. Among the provisions of the ACA of potential importance to our business and our product candidates are the following:
an annual, non-deductible fee on any entity that manufactures or imports specified branded prescription products and biological products;
an increase in the statutory minimum rebates a manufacturer must pay under the MDRP to 23.1% for innovator drugs and 13% for non-innovator drugs of the AMP;
a new methodology by which AMP is calculated and reported by manufacturers for products that are inhaled, infused, instilled, implanted or injected and not generally dispensed through retail community pharmacies;
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expansion of healthcare fraud and abuse laws, including the civil False Claims Act and the federal Anti-Kickback Statute, new government investigative powers and enhanced penalties for noncompliance;
a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 70% (as of January 1, 2019) point-of-sale discounts off negotiated prices of applicable brand products to eligible beneficiaries during their coverage gap period, as a condition for the manufacturers’ outpatient products to be covered under Medicare Part D;
extension of manufacturers’ Medicaid rebate liability from fee-for-service Medicaid utilization to include the utilization of Medicaid managed care organizations as well;
expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to additional individuals, thereby potentially increasing manufacturers’ Medicaid rebate liability;
expansion of the entities eligible for discounts under the Public Health Service Act's 340B drug pricing program;
new requirements to report to CMS annually specifying financial arrangements with physicians and teaching hospitals, as defined in the ACA and its implementing regulations, including reporting any ‘‘payments or other transfers of value’’ made or distributed to prescribers, teaching hospitals, and other healthcare providers and reporting any ownership and investment interests held by physicians and other healthcare providers and their immediate family members and applicable group purchasing organizations during the preceding calendar year;
a new requirement to annually report product samples that manufacturers and distributors provide to physicians;
a mandatory non-deductible payment for employers with 50 or more full-time employees (or equivalents) who fail to provide certain minimum health insurance coverage for such employees and their dependents;
establishment of the Center for Medicare and Medicaid Innovation within CMS to test innovative payment and service delivery models; and
a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research.
Certain provisions of the ACA have been subject to judicial challenges, as well as efforts to repeal, replace, or otherwise modify them or to alter their interpretation or implementation. For example, the Tax Cuts and Jobs Act enacted on December 22, 2017, eliminated the tax-based payment for individuals who fail to maintain minimum essential coverage under section 5000A of the Code, commonly referred to as the “individual mandate,” effective January 1, 2019. Further, the Bipartisan Budget Act of 2018 among other things, amended the Medicare statute, effective January 1, 2019, to reduce the coverage gap in most Medicare prescription drug plans, commonly known as the “donut hole,” by raising the manufacturer discount under the Medicare Part D coverage gap discount program to 70%. Additional legislative changes, regulatory changes and judicial challenges related to the ACA remain possible. It is unclear how the ACA and its implementation, as well as efforts to repeal, replace, or otherwise modify, or invalidate, the ACA, or portions thereof, will affect our business.
In addition, other legislative changes have been proposed and adopted since the ACA was enacted. For example, the Budget Control Act of 2011, as amended by the American Taxpayer Relief Act of 2012, among other things, led to aggregate reductions in Medicare payments for all items and services, including prescription drugs and biologics, to service providers of, on average, 2% per fiscal year beginning April 1, 2013, and due to subsequent legislation, will continue until 2030 (with the exception of a temporary suspension from May 1, 2020 through March 31, 2022). On December 10, 2021, President Biden signed a law that provides for 1% Medicare sequestration in the second quarter of 2022 and allows the full 2% sequestration thereafter until 2030. To offset the temporary suspension during the COVID-19 pandemic, in 2030, the sequestration will be 2.25% for the first half of the year, and 3% in the second half of the year.
The American Taxpayer Relief Act of 2012 also, among other things, reduced Medicare payments to several categories of healthcare providers and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. These new laws may result in additional reductions in Medicare and other healthcare funding and otherwise affect the prices we may obtain for any of our product candidates for which regulatory approval is obtained, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, which could have a material adverse effect on our financial operations.
Additional legislative changes, regulatory changes, or guidance could be adopted, which may impact the marketing approvals and reimbursement for our product candidates. For example, there has been increasing legislative, regulatory, and enforcement interest in the United States with respect to drug pricing practices. There have been several Congressional inquiries and proposed and enacted federal and state legislation and regulatory initiatives designed to, among other things, bring more transparency to product pricing, evaluate the relationship between pricing and manufacturer patient programs, and reform government healthcare program reimbursement methodologies for drug products. For example, Congress is currently considering changes that could affect our overall rebate liability. Changes under consideration include a drug price negotiation program, Medicare Part B and Part D inflation rebates, under which manufacturers would owe rebates if the average sales price
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or average manufacturer price of a drug were to increase faster than the pace of inflation, and Part D benefit redesign, including a proposed new manufacturer discount program. If healthcare policies or reforms intended to curb healthcare costs are adopted or if we experience negative publicity with respect to pricing of our products or the pricing of pharmaceutical drugs generally, the prices that we charge for any approved products may be limited, our commercial opportunity may be limited and/or our revenues from sales of our products may be negatively impacted.
It is possible that the ACA, as currently enacted or may be amended in the future, as well as other healthcare reform measures that may be adopted in the future, may result in additional reductions in Medicare and other healthcare funding, more rigorous coverage criteria, and new payment methodologies and in additional downward pressure on coverage and payment and the price that we receive for any approved product. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability or commercialize our products. We cannot be sure whether additional legislative changes will be enacted in the United States or outside of the United States, or whether regulatory changes, guidance or interpretations will be changed, or what the impact of such changes on the marketing approvals of our product candidates, if any, may be.
Our failure to comply with data protection laws and regulations could lead to government enforcement actions and significant penalties against us, and adversely impact our operating results.
The regulatory environment surrounding information security, data collection, and privacy is increasingly demanding. In the United States, we are subject to a number of data protection laws and regulations (i.e., laws and regulations that address privacy and data security) at both the federal and state levels. The legislative and regulatory landscape for data protection continues to evolve, and in recent years there has been an increasing focus on privacy and data security issues. Numerous federal and state laws, including state data breach notification laws, state health information privacy laws, and federal and state consumer protection laws, such as Section 5 of the Federal Trade Commission Act, govern the collection, use, and disclosure of health-related and other personal information.
In addition, we may obtain health information from third parties (e.g., healthcare providers who prescribe our products) that are subject to privacy and security requirements in the United States under HIPAA. Although we are not directly subject to HIPAA-other than potentially with respect to providing certain employee benefits-we could be subject to criminal penalties if we knowingly obtain, use or disclose individually identifiable health information maintained by a HIPAA-covered entity in a manner that is not authorized or permitted by HIPAA. Finally, a data breach affecting sensitive personal information, including health information, could result in significant legal and financial exposure and reputational damages that could potentially have an adverse effect on our business.
In addition to US data protection laws and regulations, we also may be subject to European and other international data protection requirements, such as the EU General Data Protection Regulation. Our failure to comply with data privacy and security laws and regulations, or changes in the way in which these laws are implemented, could lead to unfavorable outcomes, including increased compliance costs, delays or impediments in the development of new products, increased operating costs, diversion of management time and attention, regulatory liability as a result of government enforcement actions and significant penalties against us, civil liability as a result of claims initiated by data subjects (including claims initiated as class actions) contracting parties or other third parties as a result of non-compliance with data protection laws and/or contractual obligations, and adverse publicity that could negatively affect our operating results, financial condition and our overall and business. Federal regulators, state attorneys general, and plaintiffs’ attorneys, including class action attorneys, have been and will likely continue to be active in this space. Such liabilities could adversely impact our results of operations, financial condition and our overall business.
Laws and regulations governing any international operations we may have in the future may preclude us from developing, manufacturing and selling certain products outside of the United States and require us to develop and implement costly compliance programs.
For our current and future operations outside of the United States, we must dedicate additional resources to comply with numerous laws and regulations in each jurisdiction in which we operate. The FCPA prohibits any United States individual or business from paying, offering, authorizing payment or offering of anything of value, directly or indirectly, to any non-US official, political party or candidate for the purpose of influencing any act or decision of the non-US entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the United States to comply with certain accounting provisions requiring us to maintain books and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries, and to devise and maintain an adequate system of internal accounting controls for international operations.
Compliance with the FCPA is expensive and difficult, particularly in countries in which corruption is a recognized problem. In addition, the FCPA presents particular challenges in the pharmaceutical industry, because, in many countries, hospitals are operated by the government, and doctors and other hospital employees are considered non-US officials. Certain payments to
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hospitals in connection with clinical trials and other work have been deemed to be improper payments to government officials and have led to FCPA enforcement actions.
Various laws, regulations and executive orders also restrict the use and dissemination outside of the United States, or the sharing with certain non-United States nationals, of information classified for national security purposes, as well as certain products and technical data relating to those products. If we expand our presence outside of the United States, it will require us to dedicate additional resources to comply with these laws, and these laws may preclude us from developing, manufacturing, or selling certain products and product candidates outside of the United States, which could limit our growth potential and increase our development costs.
The failure to comply with laws governing international business practices may result in substantial civil and criminal penalties and suspension or debarment from government contracting. The SEC also may suspend or bar issuers from trading securities on United States exchanges for violations of the FCPA’s accounting provisions.
Our employees may engage in misconduct or other improper activities, including non-compliance with regulatory standards and requirements, which could cause significant liability for us and harm our reputation.
We are exposed to the risk of employee fraud or other misconduct, including intentional failure to comply with FDA regulations or similar regulations of comparable non-U.S.non-United States regulatory authorities, including Health Canada, failure to provide accurate information to the FDA or comparable non-U.S.non-United States regulatory authorities, including Health Canada or the competent authorities of the E.U.EU Member States, failure to comply with manufacturing standards we have established, failure to comply with federal and state healthcare fraud and abuse laws and regulations and similar laws and regulations established and enforced by comparable non-U.S.non-United States regulatory authorities, and failure to report financial information or data accurately or disclose unauthorized activities to us. Employee misconduct could also involve the improper use of information obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to our reputation. It is not always possible to identify and deter employee misconduct, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws, standards or regulations. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could have a significant impact on our business and results of operations, including the imposition of significant fines or other sanctions.
Risks Related to Employee Mattersour Business and Managing GrowthOperations
The COVID-19 coronavirus could adversely impact our business.
We continue to monitor the effect of the novel strain of coronavirus, COVID-19. The COVID-19 coronavirus has spread and has caused significant disruptions around the world. We may experience disruptions as a result of the COVID-19 pandemic that could severely impact our business, including:
delays or difficulties related to the continued clinical development of Vicineum for non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, including delays in clinical trial sites receiving the supplies and materials needed to conduct clinical trials, difficulties in recruiting clinical site investigators and clinical site staff and difficulties in enrolling patients or treating patients in active trials;
difficulties in raising additional capital needed for the continued development of Vicineum for non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and if approved, commercialization for Vicineum due to the long-term negative effects of the pandemic on the financial, banking and capital markets;
delays in necessary interactions with regulators and other important agencies and contractors due to limitations in employee resources, travel restrictions or forced furlough of government employees;
interruption of key business activities due to illness and/or quarantine of key individuals and delays associated with recruiting, hiring and training new temporary or permanent replacements for such key individuals, both internally and at our third-party service providers;
evolving changes in local regulations as part of a response to the COVID-19 outbreak that may require us to change the ways in which operate, which may result in unexpected costs; and
interruption of key commercialization, manufacturing, and related activities due to limitations on work and travel imposed or recommended by federal or state governments, employers and others.
The global pandemic of COVID-19 continues to evolve. The extent to which COVID-19 may impact our business will depend on future developments, which are highly uncertain and cannot be predicted with confidence, the duration of the outbreak, travel restrictions and social distancing in the United States and other countries, business closures or business disruptions and the effectiveness of actions taken in the United States and other countries to contain and treat the virus. The full impact of the COVID-19 pandemic on our operational and financial performance, including our ability to execute our business strategies and
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initiatives in the expected time frame, will depend on future developments, including the duration of the pandemic and continuing restrictions on travel and transports, and shelter-in-place, social distancing, and similar measures, all of which are uncertain and difficult to predict. The broad-based business and economic disruptions caused by the pandemic could materially affect our business condition, results of operations and cash flows, including our ability to raise additional capital.
Our future success depends on our ability to attract, retain and motivate qualified personnel.
Our future growth and success depend on our ability to recruit, retain, manage and motivate our employees. The loss of any member of our senior management team or the inability to hire or retain experienced management personnel could compromise our ability to execute our business plan and harm our operating results. Recruiting and retaining qualified scientific, clinical, manufacturing and sales and marketing personnel will also be critical to our success. The loss of the services of our executive officers or other key employees could impede the achievement of our research, development and commercialization objectives and seriously harm our ability to successfully implement our business strategy. Furthermore, replacing executive officers and key employees may be difficult and may take an extended period of time because of the limited number of individuals in our industry with the breadth of skills and experience required to successfully develop, gain regulatory approval of and commercialize products. Competition to hire from this limited pool is intense, and we may be unable to hire, train, retain or motivate these key personnel on acceptable terms given the competition among numerous pharmaceutical and biotechnology companies for similar personnel. We also experience competition for the hiring of scientific and clinical personnel from universities and research institutions. In addition, we rely on consultants and advisors, including scientific and clinical advisors,

to assist us in formulating our research and development and commercialization strategy. Our consultants and advisors may be employed by employers other than us and may have commitments under consulting or advisory contracts with other entities that may limit their availability to us. If we are unable to continue to attract and retain high quality personnel, our ability to pursue our growth strategy will be limited.
We will need to grow the size of our organization, and we may experience difficulties in managing this growth.
As of December 31, 2016, we had 34 full-time employees and one part-time employee, eight of whom are temporary employees, six hold Ph.D. degrees and one is a medical doctor. As our development and commercialization plans and strategies develop, or as a result of any future acquisitions, we will need additional managerial, operational, sales, marketing, financial and other resources. Our management, personnel and systems that are currently in place may not be adequate to support this future growth. Future growth would impose significant added responsibilities on members of management, including:
managing our clinical trials effectively;
identifying, recruiting, maintaining, motivating and integrating additional employees;
managing our internal development efforts effectively while complying with our contractual obligations to licensors, licensees, contractors and other third parties;
improving our managerial, development, operational and finance systems; and
expanding our facilities.
As our operations expand, we will need to manage additional relationships with various strategic partners, suppliers and other third parties. Our future financial performance and our ability to commercialize our product candidates, if approved, and to compete effectively will depend, in part, on our ability to effectively manage any future growth. To that end, we must be able to effectively manage our development efforts and clinical trials and hire, train and integrate additional management, administrative and sales and marketing personnel. Our failure to accomplish any of these tasks could prevent us from successfully growing our company.
If we expand our development and regulatory capabilities or implement sales, marketing and distribution capabilities, we may encounter difficulties in managing our growth, which could disrupt our operations.
To manage future growth, we must continue to implement and improve our managerial, operational and financial systems, expand our facilities and continue to recruit and train additional qualified personnel. Due to our limited financial resources and the limited experience of our management team in managing a company with such growth, we may not be able to effectively manage the expansion of our operations or recruit and train additional qualified personnel. The expansion of our operations may lead to significant costs and may divert our management and business development resources. Any inability to manage growth could delay the execution of our business plans or disrupt our operations.
We rely significantly on information technology and any failure, inadequacy, interruption or security lapse of that technology, including any cyber security incidents, could harmmaterially adversely affect our abilitybusiness.
In the ordinary course of business, we rely on information technology networks and systems, some of which are provided, hosted or managed by third parties, to operate ourcollect, store, process and transmit electronic data. In addition, we handle certain data, including proprietary business effectively.
information and personal information that is subject to data protection laws and regulations. Despite the implementation of security measures, our internal computer systems and those of third parties with which we contract are vulnerable to damage from cyber-attacks, computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. System failures, accidents or security breaches could cause interruptions in our operations and could result in a material disruption of our clinical and commercialization activities and business operations, in addition to possibly requiring substantial expenditures of resources to remedy. The loss of clinical trial data could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data.
Although we have implemented processes, procedures, and controls to help mitigate the risks associated with a cyber security incident, there can be no assurance that these measures will be sufficient for all possible situations. Even security measures that are appropriate, reasonable, and/or in accordance with applicable legal requirements may not be able to protect the networks, systems and information we maintain and those of third parties with which we contract. Unauthorized parties, whether within or outside our company, may disrupt or gain access to our systems, or those of third parties with whom we do business, through human error, misfeasance, fraud, trickery, or other forms of deceit, including break-ins, use of stolen credentials, social engineering, phishing, ransomware, computer viruses or other malicious codes, and similar means of unauthorized and destructive tampering. Even the most well-protected information, networks, systems and facilities remain potentially vulnerable because the techniques used in such attempted cyber security incidents evolve and generally are not recognized until launched against a target. Accordingly, we may be unable to anticipate these techniques or to implement adequate security barriers or other preventative measures, making it impossible for us to entirely mitigate this risk. While we have experienced, and expect to continue to experience, threats and disruptions to our information technology infrastructure, none of them to date has had a material impact on our business or operations. To the extent that any disruption or security breach were to result in a loss of, or damage to, our data or applications, or inappropriate disclosure of confidential or proprietary information, we could incur liability and our product research, development and, if approved, commercialization effortsof Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG could be delayed.delayed, or we could be subject to regulatory and other government investigations, enforcement actions, or incur liability, substantial fines or costs, any of which could materially adversely affect our business, our reputation, results of operations and financial condition. Although we maintain insurance coverage for various cyber security risks, there can be no guarantee that all costs or losses incurred will be fully insured.
Our restructuring plan and the associated headcount reduction may not result in anticipated savings, could result in total costs and expenses that are greater than expected and could disrupt our business.
On August 30, 2021, we approved a restructuring plan to reduce operating expenses and better align our workforce with the needs of our business following receipt of the CRL from the FDA regarding our BLA for Vicineum for the treatment of BCG-
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unresponsive NMIBC. The restructuring plan included a reduction in our workforce by 18 positions (approximately 35%) as well as additional cost-saving initiatives intended to preserve capital while we continue development of Vicineum. Restructuring expenses for the year ended December 31, 2021 were approximately $5.5 million, consisting primarily of severance and other employee-related costs of $2.8 million and contract termination costs of $2.7 million.
We may not realize, in full or in part, the anticipated benefits, savings and improvements in our cost structure from our restructuring efforts due to unforeseen difficulties, delays or unexpected costs. If we are unable to realize the expected operational efficiencies and cost savings from the restructuring, our operating results and financial condition would be adversely affected. Furthermore, our restructuring plan may be disruptive to our operations. For example, our headcount reductions could yield unanticipated consequences, such as increased difficulties in implementing our business strategy, including retention of our remaining employees.
We and certain of our officers have been named as defendants in three pending securities class action lawsuits and three related shareholder derivative lawsuits have been filed. These lawsuits, and potential similar or related lawsuits, could result in substantial damages, divert management’s time and attention from our business, and have a material adverse effect on our results of operations. These lawsuits, and any other lawsuits to which we are subject, will be costly to defend and are uncertain in their outcome.
On August 19, 2021, August 31, 2021 and October 7,2021, three substantially identical securities class action lawsuits captioned Bibb v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-07025, Cizek v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-07309 and Markman v. Sesen Bio, Inc. et al., Case No. 1:21-cv-08308 were filed against us and certain of our officers in the US District Court for the Southern District of New York. The three complaints allege violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder based on statements made by us concerning our BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. The three complaints seek compensatory damages and costs and expenses, including attorneys’ fees. On October 29, 2021, the court consolidated the three cases under the caption In re Sesen Bio, Inc. Securities Litigation, Master File No. 1:21-cv-07025-AKH (the “Securities Litigation”), and appointed Ryan Bibb, Rodney Samaan, Lionel Dreshaj and Benjamin Dreshaj (“Lead Plaintiffs”) collectively as the lead plaintiffs under the Private Securities Litigation Reform Act. On November 1, 2021, two stockholders filed motions to reconsider asking the court to appoint a different lead plaintiff. The court has not ruled on those motions at this time. On November 24, 2021, defendants filed a motion to transfer venue to the US District Court for the District of Massachusetts. That motion was fully briefed as of December 13, 2021, but the court has not yet ruled on that motion. On December 6, 2021, the Lead Plaintiffs filed an amended class action complaint (the “Amended Complaint”). The Amended Complaint alleges the same violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder on the same theory as the prior complaints. Defendants’ response to the Amended Complaint is due to be filed on March 7, 2022.
On September 20, 2021 and September 24, 2021, two substantially similar derivative lawsuits captioned Myers v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-11538 and D’Arcy v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-11577 were filed against our board of directors and certain of our officers in the US District Court for the District of Massachusetts, with Sesen Bio, Inc. named as a nominal defendant. On January 12, 2022, a third derivative complaint captioned Tang v. Sesen Bio, Inc., et al., was filed in Superior Court in Massachusetts against our board of directors and certain of our officers in the US District Court for the District of Massachusetts, with us named as nominal defendant, but no defendant has yet been served. The three derivative complaints allege breach of fiduciary duties, waste of corporate assets, and violations of federal securities laws based on statements made by us concerning our BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. The D’Arcy complaint further alleges unjust enrichment, abuse of control, gross mismanagement and aiding and abetting thereof. The three derivative complaints seek unspecified damages, restitution and disgorgement of profits, benefits and compensation obtained by the defendants and costs and expenses, including attorneys’ fees. On October 18, 2021, the court consolidated the two federal court cases under the caption In re Sesen Bio, Inc. Derivative Litigation, Lead Case No. 1:21-cv-11538 (the “Federal Derivative Litigation”). On December 22, 2021, the court entered a joint stipulation among the parties to stay the Federal Derivative Litigation until after a ruling on any motion to dismiss filed by defendants in the Securities Litigation. Defendants intend to seek a similar stay of the state court derivative litigation in the event any defendant is served.
We believe that these lawsuits are without merit and intend to vigorously defend against these actions. However, whether or not the claims are successful, litigation is often expensive and can divert management’s attention and resources from other business concerns, which could adversely affect our business.
We currently are not able to estimate the possible cost to us from these actions, as the pending lawsuits are currently at an early stage, and we cannot be certain how long it may take to resolve the pending lawsuits or the possible amount of any damages that we may be required to pay. If we are ultimately required to pay significant defense costs, damages or settlement amounts, such payments could adversely affect our operations.
We may be the target of similar litigation in the future. The market price of our common stock has experienced and may continue to experience volatility, and in the past, companies that have experienced volatility in the market price of their stock
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have been subject to securities litigation. Any future litigation could result in substantial costs and divert our management’s attention from other business concerns, which could seriously harm our business. We maintain liability insurance; however, if any costs or expenses associated with the pending lawsuits or any other litigation exceed our insurance coverage, we may be forced to bear some or all costs and expenses directly, which could adversely affect our business, financial condition, results of operations or stock price.
Risks Related to Ownership of Our Common Stock
If we are unable to regain compliance with the listing requirements of the Nasdaq Global Market, our common stock may be delisted from the Nasdaq Global Market which could have a material adverse effect on our business and could make it more difficult for you to sell your shares.
Our executive officers, directorscommon stock is listed on the Nasdaq Global Market, and principal stockholders, if they choosewe are therefore subject to act together,its continued listing requirements, including requirements with respect to the market value of publicly-held shares, market value of listed shares, minimum bid price per share, and minimum stockholders' equity, among others, and requirements relating to board and committee independence. If we fail to satisfy one or more of the requirements, we may be delisted from the Nasdaq Global Market.
On January 24, 2022, we received notice (the "Notice") from the Nasdaq Stock Market LLC ("Nasdaq") that we are not currently in compliance with the $1.00 minimum bid price requirement for continued listing on the Nasdaq Global Market, as set forth in Nasdaq Listing Rule 5450(a)(1). The Notice indicated that, consistent with Nasdaq Listing Rule 5810(c)(3)(A), we have 180 calendar days, or until July 25, 2022, to regain compliance with the ability to control all matters submitted to stockholders for approval.
As of March 23, 2017, our current executive officers and directors, combined with our stockholders who own more than 5%minimum bid price requirement by having the closing bid price of our outstandingcommon stock meet or exceed $1.00 per share for at least ten consecutive business days. The notification had no immediate effect on the listing of our common stock, and our common stock will continue to trade on the Nasdaq Global Market under the symbol “SESN” at this time.
If we do not regain compliance by July 25, 2022, we may be eligible for an additional 180 calendar day grace period. If we fail to regain compliance during the applicable period, we will receive notification from Nasdaq that our common stock is subject to delisting. At that time, we may then appeal the delisting determination to a Nasdaq hearings panel. Such notification will have no immediate effect on our listing on the Nasdaq Global Market, nor will it have an immediate effect on the trading of our common stock pending such hearing. There can be no assurance, however, that we will be able to regain compliance with Nasdaq’s minimum bid price requirement. If we regain compliance with the Nasdaq’s minimum bid price requirement, there can be no assurance that we will be able to maintain compliance with the continued listing requirements for the Nasdaq Global Market or that our common stock will not be delisted from the Nasdaq Global Market in the future. In addition, we may be unable to meet other applicable listing requirements of the Nasdaq Global Market, including maintaining minimum levels of stockholders’ equity or market values of our common stock in which case, our common stock could be delisted notwithstanding our ability to demonstrate compliance with the aggregate, beneficially owned shares representing 52.1%minimum bid price requirement.
Delisting from the Nasdaq Global Market may adversely affect our ability to raise additional financing through the public or private sale of equity securities, may significantly affect the ability of investors to trade our securities and may negatively affect the value and liquidity of our capitalcommon stock. Delisting also could have other negative results, including the potential loss of employee confidence, the loss of institutional investors or interest in business development opportunities.
If we are delisted from Nasdaq and we are not able to list our common stock on another exchange, our common stock could be quoted on the OTC Bulletin Board or in the “pink sheets.” As a result, we could face significant adverse consequences including, among others:

a limited availability of market quotations for our securities;
a determination that our common stock is a “penny stock” which will require brokers trading in our common stock to adhere to more stringent rules and possibly result in a reduced level of trading activity in the secondary trading market for our securities;
a limited amount of news and little or no analyst coverage for us;
we would no longer qualify for exemptions from state securities registration requirements, which may require us to comply with applicable state securities laws; and
a decreased ability to issue additional securities (including pursuant to short-form Registration Statements on Form S-3) or obtain additional financing in the future.
If our common stock becomes subject to the penny stock rules, it would become more difficult to trade our shares.
The SEC has adopted rules that regulate broker-dealer practices in connection with transactions in penny stocks. Penny stocks are generally equity securities with a price of less than $5.00, other than securities registered on certain national securities exchanges or authorized for quotation on certain automated quotation systems, provided that current price and volume information with respect to transactions in such securities is provided by the exchange or system. If we do not retain our listing on Nasdaq and if these stockholders were to choose to act together, they would be able to control all matters submitted to our stockholders for approval, as well as our management and affairs. For example, these persons, if they choose to act together, would control the election of directors and approval of any merger, consolidation or sale of all or substantially allprice of our assets.common stock is less than $5.00, our common stock may be deemed a penny stock. The
This concentration
65


penny stock rules require a broker-dealer, before a transaction in a penny stock not otherwise exempt from those rules, to deliver a standardized risk disclosure document containing specified information. In addition, the penny stock rules require that before effecting any transaction in a penny stock not otherwise exempt from those rules, a broker-dealer must make a special written determination that the penny stock is a suitable investment for the purchaser and receive (i) the purchaser’s written acknowledgment of voting power may:
delay, defer or preventthe receipt of a changerisk disclosure statement; (ii) a written agreement to transactions involving penny stocks; and (iii) a signed and dated copy of a written suitability statement. These disclosure requirements may have the effect of reducing the trading activity in control;
entrenchthe secondary market for our managementcommon stock, and the board of directors; or
delay or prevent a merger, consolidation, takeover or other business combination involving us on terms that othertherefore stockholders may desire.have difficulty selling their shares.
Provisions in our corporate charter documents and under Delaware law could make an acquisition of our company, which may be beneficial to our stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management.
Provisions in our certificateAmended and Restated Certificate of incorporationIncorporation (the "Certificate of Incorporation") and our bylaws may discourage, delay or prevent a merger, acquisition or other change in control of our company that stockholders may consider favorable, including transactions in which our stockholders might otherwise receive a premium for their shares. These provisions could also limit the price that investors might be willing to pay in the future for shares of our common stock, thereby depressing the market price of our common stock. In addition, because our board of directors is responsible for appointing the members of our management team, these provisions may frustrate or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for stockholders to replace members of our board of directors. Among other things, these provisions:
establish a classified board of directors such that only one of three classes of directors is elected each year;
allow the authorized number of our directors to be changed only by resolution of our board of directors;
limit the manner in which stockholders can remove directors from our board of directors;
establish advance notice requirements for stockholder proposals that can be acted on at stockholder meetings and nominations to our board of directors;
require that stockholder actions must be effectedaffected at a duly called stockholder meeting and prohibit actions by our stockholders by written consent;
limit who may call stockholder meetings;
authorize our board of directors to issue preferred stock without stockholder approval, which could be used to institute a “poison pill” that would work to dilute the stock ownership of a potential hostile acquirer, effectively preventing acquisitions that have not been approved by our board of directors; and
require the approval of the holders of at least 75% of the votes that all our stockholders would be entitled to cast to amend or repeal specified provisions of our certificateCertificate of incorporationIncorporation or bylaws.
Moreover, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, or DGCL, which prohibits a person who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of three years after the date of the transaction in which the person acquired in excess of 15% of our outstanding voting stock, unless the merger or combination is approved in a prescribed manner.
An active trading market
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Item 1B.    Unresolved Staff Comments.
Not applicable.
Item 2.    Properties.
We lease a 31,100 square foot manufacturing, laboratory, warehouse and office facility in Winnipeg, Manitoba. We have three 15-liter fermenters, one 30-liter fermenter, one 150-liter fermenter, one 500-liter fermenter and one 1,500-liter fermenter. Our classified fermentation suite and post-production processing capabilities were dedicated to producing our pre-clinical study and clinical trial batches of Vicineum.In September 2017, we completed the manufacturing of all Vicineum necessary for our common stock may not be sustained.
Our shares of common stock began trading on The NASDAQ Global Market on February 6, 2014. Given the limited trading history of our common stock, there is a risk that an active trading market for our shares will not be sustained, which could put downward pressure on the market price of our common stock and thereby affect the ability of our stockholders to sell their shares.
The price of our common stock has been volatile and may fluctuate in the future, which could result in substantial losses for our stockholders.
The trading price of our common stock has and may continue to fluctuate significantly. During the period from January 4, 2016 to March 23, 2017, the closing sales price of our common stock ranged from a high of $5.97 per share to a low of $0.25 per share. Our stock price experienced significant volatility in May 2015 after we announced that we failed to meet either of the

two co-primary endpoints in our Phase 3 clinical trial of isunakinra in patients with moderate to severe dry eye diseaseVISTA Trial and in January 2016 after we announced that we failed to meet the primary endpoint in our Phase 3 clinical trial of isunakinra in patients with allergic conjunctivitis. Furthermore, the stock market in general and the market for smaller biopharmaceutical companies in particular have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. As a result of this volatility, our stockholders may not be able to sell their common stock at or above the price at which they purchased their shares. The market price for our common stock may be influenced by many factors, including:
the success of competitive products or technologies;
results of clinical trials of Vicinium, Proxinium or any other product candidate that we may develop;
results of clinical trials of product candidates of our competitors;
regulatory or legal developments in the United States and other countries;
developments or disputes concerning patent applications, issued patents or other proprietary rights;
the recruitment or departure of key scientific or management personnel;
the level of expenses related to any of our product candidates or clinical development programs;
the results of our efforts to discover, develop, acquire or in-license additional products, product candidates or technologies for the treatment of ophthalmic diseases, the costs of commercializing any such products and the costs of development of any such product candidates or technologies;
actual or anticipated changes in estimates as to financial results, development timelines or recommendations by securities analysts;
variations in our financial results or those of companies that are perceived to be similar to us;
changes in the structure of healthcare payment systems;
market conditions in the pharmaceutical and biotechnology sectors;
general economic, industry and market conditions; and
the other factors described in this “Risk Factors” section.
In the past, following periods of volatility in the market price of a company’s securities, securities class action litigation has often been instituted against that company. We also may face securities class action litigation if we cannot obtain regulatory approvals for or if we otherwise fail to commercialize Vicinium or Proxinium. Such litigation, if instituted against us, could cause us to incur substantial costs to defend such claims and divert management’s attention and resources.
Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.
As of December 31, 2016, we had U.S. federal net operating loss, or NOL, carryforwards of $111.4 million, state NOL carryforwards of $110.6 million and U.S. federal and state research and development tax credit carryforwards of $1.9 million and $1.1 million, respectively. These U.S. federal and state NOL carryforwards and U.S. federal and state tax credit carryforwards expire at various dates beginning in 2025 through 2036, if not utilized. Utilization of these NOL and tax credit carryforwards may be subject to a substantial limitation under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, or the Code, and comparable provisions of state, local and foreign tax laws due to changes in ownership of our company that have occurred previously or that could occur in the future. Under Section 382 of the Code and comparable provisions of state, local and foreign tax laws, if a corporation undergoes an “ownership change,” generally defined as a greater than 50% change by value in its equity ownership over a three year period, the corporation’s ability to use its pre-change NOL carryforwards and other pre-change tax attributes, such as research and development tax credits, to reduce its post-change income may be limited. We have determined that it is more likely than not that our net operating and tax credit amounts disclosed are subject to a material limitation under Section 382. We may also experience ownership changes in the future as a result of subsequent shifts in our stock ownership. As a result, if we generate taxable income, our ability to use our pre-change NOL and tax credits carryforwards to reduce U.S. federal and state taxable income may be subject to limitations, which could result in increased future tax liability to us.
A significant portion of our total outstanding shares are eligible to be sold into the market, which could cause the market price of our common stock to drop significantly, even if our business is doing well.

Sales of a substantial number of shares of our common stock in the public market, or the perception in the market that the holders of a large number of shares intend to sell shares, could reduce the market price of our common stock. As of March 23, 2017, we had outstanding 24,700,746 shares of common stock. Of these shares, 8,746,736 shares are restricted securities under Rule 144 under the Securities Act of 1933, as amended, or Securities Act. Any of our remaining shares that are not restricted securities under Rule 144 under the Securities Act may be resold in the public market without restriction unless purchased by our affiliates.
Moreover, holders of an aggregate of 9,795,963 shares of our common stock, including 3,582,328 shares of common stock issued in connectionCRADA with the acquisition of Viventia, have rights, subjectNCI.In conjunction with this achievement, we ended our manufacturing activities at our facility in Winnipeg and completed the technology transfer process to specified conditions,outsource future Vicineum clinical and commercial to require us to file registration statements covering their shares or to include their sharesthird-party manufacturers. We operate our Winnipeg facility under a two-year renewable lease expiring in registration statements that we may file for ourselves or other stockholders. We have filed registration statements on April 9, 2014, March 12, 2015September 2022, and March 31, 2016 registering all shares of common stock that we may issue under our equity compensation plans. As of March 23, 2017, we had outstanding options to purchase an aggregate of 1,717,181 shares of our common stock, of which options to purchase 862,934 shares were vested. These shares can be freely sold in the public market upon issuance, subject to volume, notice and manner of sale limitations applicable to affiliates.
We are an “emerging growth company,” and the reduced disclosure requirements applicable to emerging growth companies may make our common stock less attractive to investors.
We are an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act, and may remain an emerging growth company for up to five years. For so long as we remain an emerging growth company, we are permitted and intend to rely on exemptions from certain disclosure requirements that are applicable to other public companies that are not emerging growth companies. These exemptions include:
not being required to comply with the auditor attestation requirements in the assessment of our internal control over financial reporting;
not being required to comply with any requirement that may be adopted by the Public Company Accounting Oversight Board regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements;
reduced disclosure obligations regarding executive compensation; and
exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved.
We have taken advantage of reduced reporting burdens in this Annual Report on Form 10-K for the annual period ended December 31, 2016, including reduced disclosure regarding executive compensation related information that would be required if we were not an emerging growth company. We expect to continue, in our public reporting, to take advantage of some or all of the reporting exemptions available to emerging growth companies. We cannot predict whether investors will find our common stock less attractive if we rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our stock price may be more volatile.
In addition, the JOBS Act also provides that an emerging growth company can take advantage of an extended transition period for complying with new or revised accounting standards. This allows an emerging growth company to delay the adoption of certain accounting standards until those standards would otherwise apply to private companies. We have irrevocably elected not to delay such adoption of new or revised accounting standards, and, as a result, we will comply with new or revised accounting standards on the relevant dates on which adoption of such standards is required for public companies that are not emerging growth companies.
We incur increased costs as a result of operating as a public company, and our management now is required to devote substantial time to new compliance initiatives and corporate governance practices.
As a public company, and particularly after we are no longer an emerging growth company, we will incur significant legal, accounting and other expenses that we did not incur as a private company. The Sarbanes-Oxley Act of 2002, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of The NASDAQ Global Market and other applicable securities rules and regulations impose various requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and corporate governance practices. Our management and other personnel devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations have increased our legal and financial compliance costs and will make some activities more time-consuming and costly. For example, we expect that these rules and regulations may make it more difficult and more expensive for us to obtain director and

officer liability insurance, which in turn could make it more difficult for us to attract and retain qualified members of our board of directors.
We cannot predict or estimate the amount of additional costs we may incur or the timing of such costs. These rules and regulations are often subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices.
For as long as we remain an emerging growth company, we may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies as described in the preceding risk factor. We may remain an emerging growth company until the end of the 2019 fiscal year, although if the market value of our common stock that is held by non-affiliates exceeds $700 million as of any June 30 before that time or if we have annual gross revenues of $1 billion or more in any fiscal year, we would cease to be an emerging growth company as of December 31 of the applicable year. We also would cease to be an emerging growth company if we issue more than $1 billion of non-convertible debt over a three-year period.
Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, or Section 404, we are required to furnish a report by our management on our internal control over financial reporting. However, while we remain an emerging growth company, we will not be required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm. To achieve compliance with Section 404 within the prescribed period, we are engaged in a process to document and evaluate our internal control over financial reporting, which is both costly and challenging. In this regard, we continue to dedicate internal resources, potentially engage outside consultants and adopt a detailed work plan to assess and document the adequacy of internal control over financial reporting, continue steps to improve control processes as appropriate, validate through testing that controls are functioning as documented and implement a continuous reporting and improvement process for internal control over financial reporting. Despite our efforts, there is a risk that we will not be able to conclude, within the prescribed timeframe or at all, that our internal control over financial reporting is effective as required by Section 404. As of December 31, 2016 there was a material weakness in our controls over the financial reporting process related to business combinations. As a result of a lack of expertise in our finance and accounting group related to the accounting for business combinations, we lacked sufficient review of assumptions used and conclusions reached from the perspective of a typical market participant used in the acquisition valuation model. If we fail to remedy this material weakness or identify one or more additional material weaknesses in our internal control over financial reporting, it could result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.
If we are unable to successfully remediate the existing material weakness in our internal control over financial reporting, we could lose investor confidence in the accuracy and completeness of our financial reports, the market price of our common stock could decline, and we could be subject to sanctions or investigations by the SEC or other regulatory authorities.
In preparing our consolidated financial statements as of December 31, 2016 and 2015 and for the three years ended December 31, 2016, our management concluded that, as of December 31, 2016, we had a material weaknesses in our internal control over financial reporting related to accounting for business combinations. A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of our financial statements will not be prevented or detected on a timely basis.
The material weakness in our internal control over financial reporting was attributable primarily to our lack of expertise in our finance and accounting group related to the accounting for business combinations. These deficiencies included, but were not limited to, our existing financial reporting and accounting personnel lacking sufficient and appropriate knowledge of U.S. GAAP and SEC rules and regulations related to business combinations. In response to this material weakness, we are currently evaluating the controls and procedures we will design and put in place to address the material weakness and plan to implement appropriate measures as part of this effort. These actions may include adding personnel, which may include one or more employees to our finance and accounting group and/or the engagement of independent consultants to aid us in our review of business combinations. However, we cannot assure you that we will be successful in pursuing these measures or that these measures will significantly improve or remediate the material weakness described above. We also cannot assure you that we have identified all of our existing material weaknesses, or that we will not in the future have additional material weaknesses. We have not yet remediated our material weakness, and the remediation measures that we intend to implement may be insufficient to address our existing material weakness or to identify or prevent additional material weaknesses.

If we are unable to remediate this weakness, or otherwise to conclude that our internal control over financial reporting is effective, or if our independent auditors determine that we have a material weakness in our internal control over financial reporting, we could lose investor confidence in the accuracy and completeness of our financial reports, the market price of our common stock could decline, and we could be subject to sanctions or investigations by the SEC or other regulatory authorities.
Our disclosure controls and procedures may not prevent or detect all errors or acts of fraud.
We are subject to the periodic reporting requirements of the Securities Exchange Act of 1934, as amended, or Exchange Act. Our disclosure controls and procedures are designed to reasonably assure that information required to be disclosed by us in reports we file or submit under the Exchange Act is accumulated and communicated to management, recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC. We believe that any disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by an unauthorized override of the controls. Accordingly, because of the inherent limitations in our control system, misstatements or insufficient disclosures due to error or fraud may occur and not be detected.
Because we do not anticipate paying any cash dividends on our common stock in the foreseeable future, capital appreciation, if any, will be our stockholders’ sole source of gain.
We have never declared or paid cash dividends on our common stock. We currently intend to retain all of our future earnings, if any, to finance the growth and development of our business. As a result, capital appreciation, if any, of our common stock will be our stockholders’ sole source of gain.
If securities or industry analysts do not publish research or publish inaccurate or unfavorable research about our business, our stock price and trading volume could decline.
The trading market for shares of our common stock depends in part on the research and reports that securities or industry analysts publish about us or our business. Securities and industry analysts do not currently, and may never, publish research on us. If no securities or industry analysts commence coverage of us, the trading price for shares of our common stock would likely be negatively impacted. In the event securities or industry analysts initiate coverage, if one or more of the analysts who cover us downgrade shares of our common stock or publish inaccurate or unfavorable research about our business, our stock price would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, demand for shares of our common stock could decrease, which might cause our stock price and trading volume to decline.
Item 1B.Unresolved Staff Comments.
Not applicable.
Item 2.Properties.
Our manufacturing facility is located in Winnipeg, Manitoba, Canada, which we operate under a five-year renewable lease through September 2020 with a right to renew the lease for one subsequent five-yearthree-year term. The manufacturing facility consists of an approximately 31,400 square foot manufacturing, laboratory, warehouse and office facility.
Our U.S. corporate headquarters is located in Cambridge, MA, where we occupy office space under a lease that was executed in October 2016. The initial term of the lease expiresexpired in July 2017, after whichwith the lease will continuenow continuing on a month-to-month basisrenewable four-month term unless terminated by either party with the requisite notice. The lease is currently extended throughJune 2022.
We also have office space in Philadelphia, PA, where we occupy office space under a lease that was executed in September 2015.December 2017. The initial term of the lease expired in August 2016, afterMay 2018, which the lease has continuednow continues on a month-to-month basisrenewable six-month terms unless terminated by either party with the requisite notice. We also have office space in Toronto, Ontario, Canada, where we occupy office space under aThe lease that is on a month-to-month basis unless terminated by either party with the requisite notice. has been extended throughMay 2022.
We believe that our existing facilities are adequate to meet our current needs and that suitable additional alternative spaces will be available in the future on commercially reasonable terms.
Item 3.    Legal Proceedings.
Item 3.Legal Proceedings.
On August 19, 2021, August 31, 2021, and October 7, 2021, three substantially identical securities class action lawsuits captioned Bibb v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-07025, Cizek v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-07309 and Markman v. Sesen Bio, Inc. et al., Case No. 1:21-cv-08308 were filed against us and certain of our officers in the US District Court for the Southern District of New York. The three complaints allege violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder, based on statements made by us concerning the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. The three complaints seek compensatory damages and costs and expenses, including attorneys’ fees. On October 29, 2021, the court consolidated the three cases under the caption In re Sesen Bio, Inc. Securities Litigation, Master File No. 1:21-cv-07025-AKH (the “Securities Litigation”), and appointed Ryan Bibb, Rodney Samaan, Lionel Dreshaj and Benjamin Dreshaj (“Lead Plaintiffs”) collectively as the lead plaintiffs under the Private Securities Litigation Reform Act. On November 1, 2021, two stockholders filed motions to reconsider asking the court to appoint a different lead plaintiff. The court has not ruled on those motions at this time. On November 24, 2021, defendants filed a motion to transfer venue to the US District Court for the District of Massachusetts. That motion was fully briefed as of December 13, 2021, but the court has not yet ruled on that motion. On December 6, 2021, the Lead Plaintiffs filed an amended class action complaint (the “Amended Complaint”). The Amended Complaint alleges the same violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder on the same theory as the prior complaints. Defendants’ response to the Amended Complaint is due to be filed on March 7, 2022.
On September 20, 2021 and September 24, 2021, two substantially similar derivative lawsuits captioned Myers v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-11538 and D’Arcy v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-11577 were filed against our board of directors and certain of our officers in the US District Court for the District of Massachusetts, with us named as nominal defendant. On January 12, 2022, a third derivative complaint captioned Tang v. Sesen Bio, Inc., et al., was filed in Superior Court in Massachusetts against our board of directors and certain of our officers in the US District Court for the District of Massachusetts, with us named as nominal defendant, but no defendant has yet been served. The three derivative complaints allege breach of fiduciary duties, waste of corporate assets and violations of federal securities laws, based on statements made by us concerning the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. The D’Arcycomplaint further alleges unjust enrichment, abuse of control, gross mismanagement and aiding and abetting thereof. The three derivative complaints seek unspecified damages, restitution and disgorgement of profits, benefits and compensation obtained by the defendants and costs and expenses, including attorneys’ fees. On October 18, 2021, the court consolidated the two federal court cases under the caption In re Sesen Bio, Inc. Derivative Litigation, Lead Case No. 1:21-cv-11538 (the “Federal Derivative Litigation”). On December 22, 2021, the court entered a joint stipulation among the parties to stay the Federal Derivative Litigation until after a ruling on any motion to dismiss filed by defendants in the Securities Litigation. Defendants intend to seek a similar stay of the state court derivative litigation in the event any defendant is served.
We believe that these lawsuits are not currently subjectwithout merit and intends to anyvigorously defend against them. The lawsuits are in the early stages, and, at this time, no assessment can be made as to the likely outcome or whether the outcome will be material legal proceedings.to us.

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Item 4.Mine Safety Disclosures.


Item 4.    Mine Safety Disclosures.
Not applicable.

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PART II
Item 5.    Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.
Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.
Stock Price
Our common stock trades on the NASDAQ Global Market under the symbol “EBIO”. The following table sets forth for the period indicated the high and low sale prices per share for our common stock as reported"SESN" on the NASDAQNasdaq Global Market for the period indicated: Market.
 Market Price
 High Low
First quarter 2015$13.50
 $8.92
Second quarter 2015$13.78
 $2.61
Third quarter 2015$8.00
 $2.25
Fourth quarter 2015$3.30
 $2.24
First quarter 2016$3.00
 $0.25
Second quarter 2016$3.80
 $0.31
Third quarter 2016$5.97
 $1.58
Fourth quarter 2016$3.23
 $1.32
Holders
As of March 23, 2017, we had 33February 21, 2022, there were 17 holders of record of our common stock. This number does not include beneficial owners whose shares were held in street name.
Dividends
We have never declared or paid, anyand for the foreseeable future do not expect to declare or pay, cash dividends on our common stock. We currently intend to retain all of our future earnings, if any, to fundfinance the developmentgrowth and growthdevelopment of our business. We do not expect to pay any cash dividends in the foreseeable future.
RecentUnregistered Sales of Unregistered Securities
During the fiscal year ended December 31, 2016, we had no sales of unregistered securities that have not been previously disclosed in a Current Report on Form 8-K or Quarterly Report on Form 10-Q.None.
PurchasePurchases of Equity Securities by the Issuer
We did not purchase anyNone.
Securities Authorized for Issuance under Equity Compensation Plans
The information required by this item regarding our equity compensation plans is incorporated herein by reference to Item 12 of our registered equity securities during the period covered byPart III of this Annual Report on Form 10-K.
Item 6.     [Reserved.]

Item 6.Selected Financial Data.
You should read the following selected financial data together with our consolidated financial statements and the related notes appearing elsewhere in this Annual Report on Form 10-K and the “Management’sItem 7.    Management’s Discussion and Analysis of Financial Condition and Results of Operations” section of this Annual Report on Form 10-K. We have derived the consolidated statement of operations and comprehensive income (loss) data for the years ended December 31, 2016, 2015 and 2014 and the consolidated balance sheet data as of December 31, 2016 and 2015 from our audited consolidated financial statements included in this Annual Report on Form 10-K. We derived the consolidated statement of operations and comprehensive income (loss) data for the years ended December 31, 2013 and 2012 and the consolidated balance sheet data as of December 31, 2014, 2013 and 2012 from our audited financial statements that are not included elsewhere in this Annual Report on Form 10-K. Our historical results for any prior period are not necessarily indicative of results to be expected in any future period. With respect to the selected financial data as of and for the year ended December 31, 2016, the following table takes in account the completion of our acquisition of Viventia on September 20, 2016. See Notes 2 and 3 within the notes to our audited consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K for further explanation regarding the effect of the Acquisition.Operations.
 Year Ended December 31,
 2016 2015 2014 2013 2012
 (in thousands, except per share data)
Consolidated Statement of Operations and Comprehensive Income (Loss) Data:         
Revenue:         
Collaboration revenue$406
 $490
 $2,243
 $1,334
 $
License revenue29,575
 500
 
 
 
Total revenue29,981
 990
 2,243
 1,334
 
Operating expenses:         
Research and development13,479
 26,336
 26,703
 13,788
 15,263
General and administrative14,736
 9,850
 8,471
 4,024
 4,213
(Gain) loss from change in fair value of contingent consideration(1,100) 
 
 
 
Total operating expenses27,115
 36,186
 35,174
 17,812
 19,476
Income (loss) from operations2,866
 (35,196) (32,931) (16,478) (19,476)
Other income (expense):         
Other income (expense), net(723) 3,139
 (849) (147) (13)
Interest expense(247) (1,395) (376) (1,400) (168)
Total other income (expense), net(970) 1,744
 (1,225) (1,547) (181)
Net income (loss) before income taxes1,896
 (33,452) (34,156) (18,025) (19,657)
       Provision for income taxes5
 


 
 
Net income (loss) and comprehensive income (loss)$1,891
 $(33,452) $(34,156) $(18,025) $(19,657)
Cumulative preferred stock dividends and accretion of preferred stock discount
 
 (519) (3,857) (3,111)
Net income (loss) applicable to common stockholders$1,891
 $(33,452) $(34,675) $(21,882) $(22,768)
Net income (loss) per share applicable to common stockholders—basic$0.09
 $(1.76) $(2.37) $(16.18) $(22.93)
Weighted-average number of common shares used in net income (loss) per share applicable to common stockholders—basic21,083
 18,993
 14,644
 1,352
 993
Net income (loss) per share applicable to common stockholders—diluted$0.09
 $(1.76) $(2.37) $(16.18) $(22.93)
Weighted-average number of common shares used in net income (loss) per share applicable to common stockholders—diluted21,733
 18,993

14,644
 1,352
 993

See Note 2 within the notes to our audited consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K for a description of the method used to calculate basic and diluted net income (loss) per share applicable to common stockholders.
 As of December 31,
 2016 2015 2014 2013 2012
 (in thousands)
Consolidated Balance Sheet Data:         
Cash and cash equivalents$25,342
 $36,079
 $54,059
 $7,942
 $7,882
Working capital21,947
 28,731
 49,199
 2,677
 6,446
Total assets104,097
 36,825
 55,000
 11,237
 9,503
Notes payable, net of current portion
 9,763
 9,749
 2,876
 1,769
Warrant liability5
 115
 3,219
 297
 147
Convertible preferred stock
 
 
 56,678
 45,035
Accumulated deficit(123,311) (125,202) (91,750) (57,594) (39,569)
Total stockholders’ equity (deficit)38,677
 18,944
 36,826
 (54,332) (39,296)

Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations.
The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our consolidated financial statements and therelated notes to thosethereto and other financial statements appearinginformation included elsewhere in this Annual Report on Form 10-K. ThisIn addition to historical information, some of the information contained in the following discussion and analysis contains forward-looking statements that involve risks, uncertainties and uncertainties. As a result of many factors, including those factors set forth in Part I, Item IA, “Risk Factors”assumptions. You should review "Item 1A. Risk Factors" of this Annual Report on Form 10-K for a discussion of important factors that could cause our actual results couldto differ materially from the results described in or implied by the forward-looking statements.statements contained in the following discussion and analysis.
Overview
We are a biologics oncologylate-stage clinical company primarily focused on designing, engineeringadvancing targeted fusion protein therapeutics ("TFPTs") for the treatment of patients with cancer. We genetically fuse the targeting antibody fragment and developing targeted protein therapeutics. Our TPTs are single-protein therapeutics composed of targeting moieties genetically fused via linker domains tothe cytotoxic protein payloads that arepayload into a single molecule which is produced through our proprietary one-step, microbial manufacturing process. We target tumor cell surface antigens that allowwith limited expression on normal cells. Binding of the target antigen by the TFPT allows for rapid internalization into the targeted cancer cell and have limited expression on normal cells.cell. We have designed our TPTstargeted proteins to overcome the fundamental efficacy and safety challenges inherent in existing antibody drugantibody-drug conjugates or ADCs,("ADCs") where a payload is chemically attached to a targeting antibody.
Our most advanced product candidate, is Vicinium, whichVicineum, also known as VB4-845, is a locally-administered TPT. In the third quartertargeted fusion protein composed of 2015, we, through our recently acquired subsidiary Viventia, commenced in the United States and Canada a Phase 3 clinical trial of Vicinium for the treatment of subjects with high-grade non-muscle invasive bladder cancer, or NMIBC. Our second most advanced product candidate is Proxinium, a locally-administered TPT intended for the treatment of EpCAM positive squamousan anti-epithelial cell carcinoma of the head and neck, or SCCHN. A Phase 1/2a clinical trial will explore the potential of Proxinium in combination with a checkpoint inhibitor for the treatment of SCCHN and is planned to commence enrollment in the second half of 2017. We are also developing cancer therapies for systemic administration utilizing our TPT platform and our proprietary payload deBouganin. We may explore additional therapeutic indications for Vicinium and Proxinium.
Our locally-administered TPTs contain a targeting moiety that is designed to bind to EpCAM, which is a protein over expressed in many cancers. This targeting moiety is genetically fusedadhesion molecule ("EpCAM") antibody fragment tethered to a truncated form of ETA,Pseudomonas exotoxin A for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
In December 2020, we submitted our completed BLA for Vicineum for the treatment of BCG-unresponsive NMIBC to the FDA, which is an immunogenic cytotoxic protein payload that is producedwas accepted for filing by the bacterial species, Pseudomonas. These product candidates are designed to bind to EpCAMFDA in February 2021. The FDA granted Priority Review for the BLA and set a target PDUFA date for a decision on the surfaceBLA of cancer cells.August 18, 2021.On August 13, 2021, we received a CRL from the FDA indicating that the FDA had determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality. On August 20, 2021, we withdrew our MAA to the EMA for Vysyneum for the treatment of BCG-unresponsive NMIBC in order to pause our plans to pursue regulatory approval of Vysyneum in the European Union until there is more clarity from the FDA on next steps for Vicineum in the United States. Vysyneum is the proprietary brand name that was conditionally approved by the EMA for oportuzumab monatox in the European Union. In
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October 2021, the EMA issued its Withdrawal Assessment Report relating to our MAA for Vysyneum, as is consistent with the EMA’s standard practice when an MAA is withdrawn. The TPT-EpCAM complex is subsequently internalized intoEMA Withdrawal Assessment Report reflects the cellinitial assessment and once insidecorresponding questions from the cell,EMA and identifies major objections in the TPT is cleaved byareas of quality, good clinical practice, efficacy and safety. Due to the high concordance between FDA and European Commission approvals, we believe that the probability of success of future approval in the European Union for Vysyneum increases if FDA approval for Vicineum has already been obtained.
On October 29, 2021, we participated in a cellular enzymeType A Meeting with the FDA to releasediscuss questions related to CMC raised in the cytotoxic protein payload, thus enabling cancer cell-killing.CRL (the “CMC Type A Meeting”). During the CMC Type A Meeting, we and the FDA reviewed issues related to CMC to be further discussed during the review of a BLA for Vicineum upon potential resubmission. We believe we have a clear understanding of what additional information regarding CMC is required for a potential resubmission of a BLA. Additionally, although not an issue raised in the CRL, the FDA confirmed at the CMC Type A Meeting that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical trials. The FDA also confirmed that we can utilize Vicineum manufactured during process validation for any future clinical trials needed to address issues raised in the CRL, and that these potential trials can proceed while addressing CMC issues.
On December 8, 2021, we participated in a Type A Meeting with the FDA to discuss design elements of an additional Phase 3 clinical trial for Vicineum (the “Clinical Type A Meeting”), which the FDA confirmed will be required for a potential resubmission of a BLA. The trial design may include these elements:
A randomized clinical trial assessing the safety and efficacy of Vicineum compared to investigators’ choice of intravesical chemotherapy;
Trial may include both patients who have received adequate BCG1 and patients who have received less than adequate BCG;
The FDA encouraged us to submit the final results from the Phase 3 Vista Trial for Vicineum with a BLA resubmission.
1As per the 2018 FDA guidance on NMIBC, adequate BCG is defined as at least one of the following: (i) at least five of six doses of an initial induction course plus at least two of three doses of maintenance therapy or (ii) at least five of six doses of an initial induction course plus at least two of six doses of a second induction course.
On January 7, 2022, the FDA granted our TPTs designedrequest for local administrationa Type C Meeting to discuss the study protocol for an additional Phase 3 clinical trial that we plan to conduct for potential resubmission of a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. The Type C Meeting has been scheduled for March 28, 2022.
One of the items we expect to be discussed in the Type C Meeting is the patient population for the additional Phase 3 clinical trial, which may be different than the patient population studied in previous clinical trials for Vicineum for the treatment of NMIBC in two primary ways.
First, the additional Phase 3 clinical trial may include patients with only non-muscle invasive carcinoma in situ (CIS) of the bladder, and may not include patients with only directly kill cancer cells throughpapillary disease of the bladder. This change would lead to a targeted deliverysmaller overall patient population than previously studied, as some of our past clinical trials of Vicineum in NMIBC have included patients with CIS or high-grade papillary disease of the bladder.
Second, the additional Phase 3 clinical trial may include patients who have received less than adequate BCG in addition to those who have received adequate BCG, per the FDA’s guidance. Receipt of less than adequate BCG could be due to (i) failure of, or intolerance to, a cytotoxic protein payload, but also potentiate an anti-cancer therapeutic immune responseBCG therapy prior to reaching the FDA’s definition of adequate BCG or (ii) supply shortages of BCG, among other reasons. This change would lead to a larger patient population than previously studied, as past clinical trials of Vicineum in cancer cells nearNMIBC only included patients who had previously been treated with adequate BCG.
Potential changes related to the siteadditional Phase 3 clinical trial for Vicineum will be discussed at the upcoming Type C Meeting with the FDA scheduled for March 28, 2022.
The single-arm, multi-center, open-label Phase 3 clinical trial (“VISTA Trial”) completed enrollment in April 2018 with a total of administration. This immune response is believed133 patients across three cohorts based on histology and time to disease recurrence after adequate BCG treatment:
Cohort 1 (n=86): Patients with CIS with or without papillary disease that was determined to be triggered by both the immunogenic cell deathrefractory or recurred within six months of their last course of adequate BCG;
Cohort 2 (n=7): Patients with CIS with or without papillary disease that recurred after six months, but less than 11 months, after their last course of adequate BCG; and
Cohort 3 (n=40): Patients with high-risk (Ta or T1) papillary disease without CIS that recurred within six months of their last course of adequate BCG.
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The primary endpoints of the VISTA Trial were CRR at 3 months in patients with CIS (with or without papillary disease) whose disease is BCG-unresponsive and duration of response ("DoR") for BCG-unresponsive CIS patients who experience a complete response ("CR").
As of the May 29, 2019 data cutoff date, preliminary primary and secondary endpoint data for each of the trial cohorts were as follows:
Cohort 1 (n=86) Evaluable Population (n=82) Complete Response Rate, for CIS:
Time PointEvaluable Patients*
Complete Response Rate
(95% Confidence Interval)
3-monthsn=8239% (28%-50%)
6-monthsn=8226% (17%-36%)
9-monthsn=8220% (12%-30%)
12-monthsn=8217% (10%-27%)
*Response-evaluable population includes any mITT patient who completed the induction phase.
Cohort 2 (n=7) Evaluable Population (n=7) Complete Response Rate, for CIS:
Time PointEvaluable Patients*
Complete Response Rate
(95% Confidence Interval)
3-monthsn=757% (18%-90%)
6-monthsn=757% (18%-90%)
9-monthsn=743% (10%-82%)
12-monthsn=714% (0%-58%)
*Response-evaluable population includes any mITT patient who completed the induction phase.
Pooled Cohorts 1 and 2 (n=93) Evaluable Population (n=89) Complete Response Rate, for CIS:
Time PointEvaluable Patients*
Complete Response Rate
(95% Confidence Interval)
3-monthsn=8940% (30%-51%)
6-monthsn=8928% (19%-39%)
9-monthsn=8921% (13%-31%)
12-monthsn=8917% (10%-26%)
*Response-evaluable population includes any mITT patient who completed the induction phase.
Phase 3 Pooled Complete Response Rate vs. Phase 2 Pooled Complete Response Rate:
Time PointPhase 3 Pooled CRR (95% Confidence Interval)Phase 2 Pooled CRR (95% Confidence Interval)
3-months40% (30%-51%)40% (26%-56%)
6-months28% (19%-39%)27% (15%-42%)
9-months21% (13%-31%)18% (8%-32%)
12-months17% (10%-26%)16% (7%-30%)

Cohort 3 (n=40) Evaluable Population (n=38) Recurrence-Free Rate†:
Time PointEvaluable Patients*
Recurrence-Free Rate
(95% Confidence Interval)
3-monthsn=3871% (54%-85%)
6-monthsn=3858% (41%-74%)
9-monthsn=3845% (29%-62%)
12-monthsn=3842% (26%-59%)
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†Recurrence-free rate is defined as the percentage of patients that are recurrence-free at the given assessment time point.
*Response-evaluable population includes any mITT patient who completed the induction phase.
Duration of Response:The median DoR for patients in Cohort 1 and Cohort 2 combined (n=93) is 287 days (95% CI, 154-NE), using the Kaplan-Meier method. Additional ad hoc analysis of pooled data for all patients with CIS (Cohorts 1 and 2, n=93) shows that among patients who achieved a complete response at 3 months, 52% remained disease-free for a total of 12 months or longer after starting treatment, using the Kaplan-Meier method. DoR is defined as the time from first occurrence of complete response to documentation of treatment failure or death.
    We have conducted additional analyses for secondary endpoints. These additional data include the following:
Time to Cystectomy:Across all 133 patients treated with Vicineum in the VISTA Trial, greater than 75% of all patients are estimated to remain cystectomy-free at 3 years, using the Kaplan-Meier method. Additional ad hoc analysis shows that approximately 88% of responders are estimated to remain cystectomy-free at 3 years. Time to cystectomy is defined as the time from the date of first dose of study treatment to surgical bladder removal. The first 2018 FDA guidance on treatment of BCG-unresponsive NMIBC patients states that the goal of therapy in such patients is to avoid cystectomy. Therefore, time to cystectomy is a key secondary endpoint in the VISTA Trial.
Time to Disease Recurrence: High-grade papillary (Ta or T1) NMIBC is associated with high rates of progression and recurrence. The median time to disease recurrence for patients in Cohort 3 (n=40) is 402 days (95% CI, 170-NE), using the Kaplan-Meier method. Time to disease recurrence is defined as the time from the date of the first dose of study treatment to the first occurrence of treatment failure or death on or prior to treatment discontinuation.
Progression-Free Survival ("PFS"):90% of all 133 patients treated with Vicineum in the VISTA Trial are estimated to remain progression-free for 2 years or greater, using the Kaplan-Meier method. PFS is defined as the time from the date of first dose of study treatment to the first occurrence of disease progression (e.g., T2 or more advanced disease) or death on or prior to treatment discontinuation.
Event-Free Survival: 29% of all 133 patients treated with Vicineum in the VISTA Trial are estimated to remain event-free at 12 months, using the Kaplan-Meier method. Event-free survival is defined as the time from the date of first dose of study treatment to the first occurrence of disease recurrence, progression or death on or prior to treatment discontinuation.
Overall Survival ("OS"):96% of all 133 patients treated with Vicineum in the VISTA Trial are estimated to have an overall survival of 2 years or greater, using the Kaplan-Meier method. OS is defined as the time from the date of first dose of study treatment to death from any cause.
Data is as of the May 29, 2019 data cut from the Phase III VISTA trial. The clinical data shown are based on the data submitted in the BLA on December 18, 2020. Final numbersare pending. On August 13, 2021, the FDA issued a CRL for the BLA that included requests for additional clinical and statistical data.
Safety Results
As of the May 29, 2019 data cutoff date, in patients across all cohorts (n=133) of our Phase 3 VISTA Trial of Vicineum for the treatment of BCG-unresponsive NMIBC, 88% experienced at least one adverse event, with 95% of adverse events being Grade 1 or 2. The most commonly reported treatment-related adverse events were dysuria (14%), hematuria (13%) and urinary tract infection (12%) - all of which are consistent with the profile of bladder cancer cellspatients and the use of catheterization for treatment delivery. These adverse events were determined by the clinical investigators to be manageable and reversible, and only four patients (3%) discontinued treatment due to our payloads’ mechanisman adverse event. Serious adverse events, regardless of actiontreatment attribution, were reported in 14% of patients. There were four treatment-related serious adverse events reported in three patients including acute kidney injury (Grade 3), pyrexia (Grade 2), cholestatic hepatitis (Grade 4) and renal failure (Grade 5 or death). There were no age-related increases in adverse events observed in the subsequent release of tumor antigens and the immunologically active setting created by the nature of the cytotoxic protein payloads.VISTA Trial.
Our early pipeline product candidate, VB6-845d, is being developed for systemic administration as a treatment for multipleManufacturing

types of EpCAM-positive solid tumors. VB6-845d is a TPT consisting of an EpCAM targeting Fab genetically linked to deBouganin, a novel plant derived cytotoxic payload that we have optimized for minimal immunogenic potential.
We were incorporated and commenced active operations in early 2008, and our operations to date have been limited to organizing and staffing our company, acquiring rights to intellectual property, business planning, raising capital, developing our technology, identifying potential product candidates, undertaking pre-clinical studies and conducting clinical trials. To date, we have financed our operations primarily through private placements of our common stock and preferred stock and convertible bridge notes, venture debt borrowings, our IPO, sales effected in an “at-the-market” offering through our agent, Cowen and Company, LLC, or Cowen, from the License Agreement with Roche, and, to a lesser extent, from our former collaboration agreement with ThromboGenics N.V., or ThromboGenics. We have devoted substantially all of our financial resources and efforts to research and development activities. We have not completed development of any of our product candidates. We expect to continue to incur significant expenses and operating losses over the next several years. Our net losses may fluctuate significantly from quarter to quarter and year to year.
License Agreement with Roche
On June 10, 2016,In October 2018, we entered into the Licensea Master Bioprocessing Services Agreement with Roche. UnderFujifilm (the "Fujifilm MSA") for the Licensemanufacturing process and technology transfer of Vicineum drug substance production.
In November 2019, we entered into a Commercial Manufacturing and Supply Agreement with Baxter for the manufacturing process and technology transfer of Vicineum drug product production.
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In August 2020, we completed manufacturing of the drug substance process performance qualification (“PPQ”) batches at Fujifilm and in September 2020, we successfully completed the drug product PPQ batches at Baxter. All of the completed drug substance PPQ batches and drug product PPQ batches met all quality acceptance criteria.
In December 2020, we received and analyzed all of the analytical comparability test results from the drug substance and drug product PPQ batches. For analytical comparability, we conducted testing across four categories: release testing, biophysical characterization, forced degradation studies, and stability studies. This approach is in alignment with requirements of the FDA, the EMA and the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use. The test results for Vicineum produced by Fujifilm and Baxter were found to be highly comparable to supply of Vicineum at our Winnipeg facility.
In June 2021, we entered into a Global Supply Agreement with Qilu pursuant to which Qilu will be part of the manufacturing network for, if approved, global commercial supply of Vicineum drug substance and drug product.
On October 29, 2021, at the CMC Type A Meeting, the FDA confirmed that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical trials and confirmed that we can utilize Vicineum manufactured during process validation for any future clinical trials needed to address issues raised in the CRL regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC, and that any of these future trials can proceed while addressing CMC issues raised in the CRL.
In January 2022, we signed a Scope of Work ("SOW #11") with Fujifilm under the Fujifilm MSA for the manufacturing of commercial batches of Vicineum in 2022 and 2023.
We intend to use Vicineum produced by Fujifilm and Baxter for any future clinical trials of Vicineum and, if approved, for commercial supply.
Outside of United States ("OUS") Business Development Partnering
Greater China
On July 30, 2020, we and our wholly-owned subsidiary, Viventia Bio, Inc., entered into an exclusive license agreement with Qilu Pharmaceutical, Co., Ltd. ("Qilu") pursuant to which we granted RocheQilu an exclusive, worldwidesublicensable, royalty-bearing license, under certain intellectual property owned or exclusively licensed by us, to develop, manufacture and commercialize Vicineum for the treatment of BCG-unresponsive NMIBC and other types of cancer in China, Hong Kong, Macau and Taiwan ("Greater China"). We also granted Qilu a non-exclusive, sublicensable, royalty-bearing sublicense, under certain other intellectual property licensed by us to develop, manufacture and commercialize at its cost, our monoclonal antibody EBI-031Vicineum in Greater China. We retain (i) development and all other IL-6 antagonist antibody technology owned by us.
Roche paid an upfront license fee of $7.5 million and a development milestone payment of $22.5 million as a resultcommercialization rights in the rest of the IND application for EBI-031 becoming effective. Roche hasworld excluding Greater China, the Middle East and North Africa region (“MENA”) and Turkey and (ii) manufacturing rights with respect to Vicineum in the rest of the world excluding Greater China.
During 2020, we received a total of $10 million in net proceeds associated with the Qilu License Agreement. We are also agreedentitled to payreceive up to an additional $240.0$23 million upon the achievement of specified regulatory,certain technology transfer, development and commercial milestones. In addition, we are entitled to receiveregulatory milestones, as well as a 12% royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% forbased upon annual net sales of potential future products containing EBI-031Vicineum in Greater China. The royalties are payable upon the first commercial sale of Vicineum in a region and up to 50%continuing until the latest of these rates for net sales(i) twelve years after the first commercial sale of potential future products containing other IL-6 compounds, with eachVicineum in such region, (ii) the expiration of the royaltieslast valid patent claim covering or claiming the composition of matter, method of treatment, or method of manufacture of Vicineum in such region, and (iii) the expiration of regulatory or data exclusivity for Vicineum in such region. The royalty rate is subject to reduction under certain circumstances, andincluding when there is no valid claim of a licensed patent that covers Vicineum in a particular region or no data or regulatory exclusivity of Vicineum in a particular region.
The Investigational New Drug application ("IND") for Vicineum submitted by Qilu to the buy-out optionsCenter for Drug Evaluation of Roche.the China National Medical Products Administration was accepted for review in January 2021 and approved in March 2021, resulting in a $3 million milestone payment from Qilu, the first milestone payment out of the $23 million in potential milestone payments. We recorded $2.8 million (net of VAT) as license revenue during the three-month period ended March 31, 2021.
Liquidity
Since inception,In June 2021, the Qilu License Agreement was recognized by Shandong Province, Bureau of Science and Technology as "Technology Transfer". An agreement that is designated as a Technology Transfer shall be entitled to a tax incentive of value-added tax ("VAT") recovery. As such, we have incurred significant operating losses and expect to continue to incur operating losses for the foreseeable future. We had net income of $1.9 million for the year ended December 31, 2016 due to the $29.6recorded $0.9 million of revenue during the three months ended June 30, 2021, for additional purchase price resulting from the License Agreement; however, we have incurred net lossesQilu's obligation to pay Sesen an amount equal to its recovery of $33.5 million for the year ended December 31, 2015 and $34.2 million for the year ended December 31, 2014. As of December 31, 2016, we had an accumulated deficit of $123.3 million.
VAT. We dowill not know when, or if, we will generate any revenue from the sale of our product candidates as we seek regulatory approval for, and potentially begin to commercialize, any of our product candidates. We anticipate that we will continue to incur losses for the next several years, and we expect the losses to increase as we continue the development of, and seek regulatory approvals for, our product candidates, and begin to commercialize any approved products. We arebe subject to allVAT on future potential milestone payments to Qilu.
On July 20, 2021 we and Qilu announced the enrollment of the risks commonfirst patient in China in a Phase 3 clinical trial to assess the developmentefficacy and safety of new products,Vicineum in patients with BCG-unresponsive NMIBC. The open-label, single-arm, multi-center bridging trial will evaluate the efficacy and we may encounter unforeseen expenses, difficulties, complications, delays and other unknown factors that may adversely affect our business. Until we can generate substantial revenue from commercial sales, if ever, we expect to seek additional capital through a combinationsafety of private and public equity offerings, debt financings, strategic collaborations and alliances and licensing arrangements. To the extent that we raise additional capital through the saleVicineum in approximately 53 patients with carcinoma in situ (CIS) with or without papillary disease, high-grade Ta papillary disease or T1 papillary disease of equity or convertible debt securities, the ownership interests of existing shareholdersany grade. Patients will be diluted, and the terms may include liquidation or other preferences that adversely affect the rights of existing shareholders. Debt financing, if available, may involve agreements that include liens or other restrictive covenants limiting our ability to take important actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise additional funds through strategic collaborations and alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies or grant licenses on terms that are not favorable to us. If we are unable to raise additional funds when needed, we may be required to delay, limit, reduce or terminatehave failed previous treatment with BCG for inclusion in the trial. The primary endpoints are the complete response rate (for CIS patients)
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and the recurrence-free rate (for papillary patients) at six months, with the complete response rate and the recurrence-free rate at three months, safety and tolerability as the secondary endpoints. Based on the Qilu License Agreement, the trial is being run at the sole cost of Qilu.
MENA
On November 30, 2020, we and our development or commercialization efforts or grant rightswholly owned subsidiary, Viventia Bio, Inc., entered into an exclusive license agreement with Hikma Pharmaceuticals LLC, to develop and market our technologies that we would otherwise prefercommercialize Vicineum for the treatment of BCG-unresponsive NMIBC in MENA region (20 countries in Middle East and North Africa) (the “MENA License Agreement”). In consideration for the rights granted by us, Hikma agreed to developpay to us an upfront payment, sales related milestones payments, and market ourselves.
Our future capital requirements will dependroyalties on many factors, including:
net sales in the scope, initiation, progress, timing, costs and results of pre-clinical development and laboratory testing and clinical trialsMENA region for our product candidates;
our ability to establish collaborations on favorable terms, if at all, particularly manufacturing, marketing and distribution arrangements for our product candidates;

the costs and timingterm of the implementation of commercial-scale manufacturing activities;Hikma License Agreement.
the costs and timing of establishing sales, marketing and distribution capabilities for our product candidates;Turkey
the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending any intellectual property-related claims;
our obligation to make milestone, royalty and other payments to third-party licensors under our licensing agreements;
the extentOn August 5, 2021, we entered into an exclusive license agreement with EİP Eczacıbaşı İlaç Pazarlama A.Ş., (“EIP”) pursuant to which we in-license or acquire rightsgranted EIP an exclusive license to other products, product candidates or technologies;
the outcome, timingregister and cost of regulatory review by the FDA and comparable foreign regulatory authorities, including the potentialcommercialize Vicineum for the FDA or comparable foreign regulatory authorities, including Health Canada, to require that we perform more studies or clinical trials than those that we currently expect;
our ability to achieve certain future regulatory, developmenttreatment of BCG-unresponsive NMIBC in Turkey and commercialization milestones under the License Agreement with Roche;
the effect of competing technological and market developments; and
the revenue, if any, received from commercial sales of any product candidates for which we receive regulatory approval.
Accordingly, until such time that we can generate substantial revenue from product sales, if ever, we expect to finance our operations through public or private equity or debt financings or other sources. However, we may be unable to raise additional funds or enter into such arrangements when needed on favorable terms, or at all, which would have a negative impact on our financial condition and could force us to delay, limit, reduce or terminate our development programs or commercialization efforts or grant to others rights to develop or market product candidates that we would otherwise prefer to develop and market ourselves. Failure to receive additional funding could cause us to cease operations, in part or in full. Furthermore, even if we believe we have sufficient funds for our current or future operating plans, we may seek additional capital due to favorable market conditions or strategic considerations.
We believe that our cash and cash equivalents of $25.3 million as of December 31, 2016 will be sufficient to fund our current operating plan into early 2018; however, we have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect.
Financial Operations Overview
Revenue
To date, we have not generated any revenues from the sale of products. Substantially all of our revenue to date has been derived from a license agreement and, to a lesser extent, from a collaboration. We do not expect to generate significant product revenue unless and until we obtain marketing approval for, and commercialize our product candidates.
Northern Cyprus. Under the terms of the License Agreement with Roche, Roche paidlicensing agreement, we are entitled to receive an upfront payment of $1.5 million. We are in the process of amending the license feeagreement to defer payment of $7.5the upfront payment to coincide with the potential FDA approval of Vicineum. We are also eligible to receive additional regulatory and commercial milestone payments of $2.0 million and are entitled to receive a development milestone payment30% royalty on net sales in Turkey and Northern Cyprus.
Internal Review
In September 2021 we disclosed that our Board of $22.5 million asDirectors (the “Board”) initiated an independent internal review conducted by outside counsel with the assistance of subject matter experts focusing on the conduct of, and data generated from, the clinical trials of Vicineum for the treatment of BCG-unresponsive NMIBC, and the overall safety of Vicineum (the “Review”). The Review took place over the course of five months, involved full cooperation from our management team, a review of more than 600,000 documents, and 39 interviews of current and former employees and consultants. It is now complete. As a result of the IND applicationReview, the Board continues to fully support our current management team and believes no changes or amendments relating to our prior disclosures to the Securities and Exchange Commission (“SEC”) or the FDA relating to Vicineum, the Phase 3 VISTA trial for EBI-031 becoming effective.Vicineum for the treatment of BCG-unresponsive NMIBC, or the BLA for Vicineum are warranted. We intend to work cooperatively with the FDA in preparing for an additional Phase 3 clinical trial for Vicineum.
We also have generatedComponents of Our Results of Operations
License Revenue
License revenue consists of revenue recognized pursuant to our commercialization partnership agreements, including the Qilu License Agreement, which is assessed under ASC Topic 606, Revenue ("ASC 606"). In the future, we may generate revenue from our collaborationa combination of up-front payments, milestone payments and license agreement with ThromboGenics, which we entered intoroyalties in May 2013. Under the agreement, we and ThromboGenics collaborated to seek to identify protein or peptide therapeutics that directly modulate any of a specified set of targets in a novel pathway in retinal disease. In connection with our commercialization partnership agreements, including the agreement, ThromboGenics paid us an upfront technology licensing fee of $1.75 million and paid us to perform activities under the agreement at a set rate per full-time equivalent person working on collaboration activities. On August 1, 2016, we received notice from ThromboGenics of ThromboGenics’s termination, effective as of October 31, 2016, of the agreement.Qilu License Agreement.
Research and Development Expenses
Research and development expenses consist primarily of costs incurred for the development of our product candidates,Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, which include:
employee-related expenses, including salaries, benefits, travel and stock-basedshare-based compensation expense;
expenses incurred under agreements with CROs,contract research organizations ("CROs") and investigative sites that conduct our clinical trials;trials, including the additional Phase 3 clinical trial for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
expenses associated with developing manufacturing capabilities;
expenses associated with transferring manufacturing capabilities andto contract manufacturing clinical trial materials;organizations ("CMOs") for commercial-scale production;

facilities, depreciation and other expenses, which include direct and allocated expenses for rent and maintenance of facilities, insurance and other supplies; and
expenses associated with pre-clinical, clinicalregulatory activities; and regulatory activities.
expenses associated with license milestone fees.
We expense research and development costs as incurred. We recognize external development costs based on an evaluation of the progress to completion of specific tasks using information and data provided to us by our vendors and our clinical sites.
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The successful development and commercialization of any product candidateVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG is highly uncertain. This is due to the numerous risks and uncertainties associated with product development and commercialization, including the uncertainty of:
the scope, progress, outcome and costs of our clinical trials, including the additional Phase 3 clinical trial, and other research and development activities;
the efficacy and potential advantages of our product candidatesVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG compared to alternative treatments, including any standard of care;
the market acceptance of our product candidates;Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
the cost and timing of the implementation of commercial-scale manufacturing of our product candidates;Vicineum;
obtaining, maintaining, defending and enforcing patent claims and other intellectual property rights;
significant and changing government regulation;
the impact of the COVID-19 pandemic; and
the timing, receipt and terms of any marketing approvals.
A change in the outcome of any of these variables with respect to the development of any product candidateVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG could mean a significant change in the costs and timing associated with the development of that product candidate.Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. For example, if the FDA or another regulatory authority were to require us to conduct clinical trials or other testing beyond those that we currently contemplate will be required for the completion of clinical development of any product candidate,Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or if we experience significant delays in enrollment in any of our clinical trials,less than adequate BCG, we could be required to expend significant additional financial resources and time on the completion of clinical development of that product candidate.Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
We allocate direct research and development expenses, consisting principally of external costs, such as fees paid to investigators, consultants, central laboratories and CROs in connection with our clinical trials, and costs related to manufacturing or purchasing clinical trial materials and technology transfer and license milestone fees, to specific product programs. We do not allocate employee and contractor-related costs, costs associated with our platform and facility expenses, including depreciation or other indirect costs, to specific product programs because these costs aremay be deployed across multiple product programs under research and development and, as such, are separately classified. The table below provides research and development expenses incurred for our Vicinium, EBI-031 and isunakinra product programsVicineum for the treatment of BCG-unresponsive NMIBC and other expenses by category. FollowingWe have deferred further development of Vicineum for the acquisitiontreatment of Viventia,SCCHN and VB6-845d in order to focus our researchefforts and our resources on our ongoing development expensesand, if approved, commercialization of Vicineum for Vicinium and Proxinium will materially increase during subsequent periods. the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
We did not allocate research and development expenses to Proxinium or any other specific product programsprogram during the periods presented:presented (in thousands):
Year ended December 31,
202120202019
Programs:
Vicineum for the treatment of BCG-unresponsive NMIBC$15,110 $22,234 $16,023 
Total direct program expenses15,110 22,234 16,023 
Personnel and other expenses:
Employee and contractor-related expenses8,977 5,775 6,513 
Platform-related lab expenses172 303 513 
Facility expenses524 442 442 
Other expenses529 437 1,172 
Total personnel and other expenses10,202 6,957 8,640 
Total Research and Development$25,312 $29,191 $24,663 
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 Year ended December 31,
 2016 2015 2014
 (in thousands)
Programs:     
Vicinium (1)$1,564
 $
 $
EBI-031 (2)2,996
 5,384
 
Isunakinra/EBI-005 (3)1,653
 14,455
 19,820
Total direct program expenses6,213
 19,839
 19,820
Personnel and other expenses: 
Employee and contractor-related expenses5,863
 4,762
 4,620
Platform-related lab expenses479
 620
 855
Facility expenses561
 536
 473
Other expenses363
 579
 935
Total personnel and other expenses7,266
 6,497
 6,883
Total research and development expenses$13,479
 $26,336
 $26,703

(1) Our development activities for Vicinium will increase significantly during subsequent periods.
(2) Beginning August 16, 2016, Roche is responsible for all development costs for EBI-031.

(3) Our development activities for isunakinra are no longer ongoing as of December 31, 2016.
General and Administrative Expenses
General and administrative expenses consist primarily of salaries and related costs for personnel, including stock-basedshare-based compensation and benefits, in executive, operational, finance, business development and human resource functions. Other general and administrative expenses include facility-related costs, and professional fees for legal, insurance, investment banking fees, patent, consulting and accounting services.services, pre-commercial United States market research and pre-launch market readiness for the potential commercial launch of Vicineum.
Restructuring Charge
On August 30, 2021, we approved a restructuring plan to reduce operating expenses and better align our workforce with the needs of our business following receipt of the CRL from the FDA regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC (the “Restructuring Plan”). The Restructuring Plan included a reduction in our workforce by 18 positions (or approximately 35% of our workforce) as well as additional cost-saving initiatives intended to preserve capital while we continue development of Vicineum. Restructuring costs related to the Restructuring Plan were recorded in operating expenses in our Consolidated Statements of Operations and Comprehensive Loss.
Intangibles Impairment Charge
Our intangible assets consist of indefinite-lived, acquired in-process research and development ("IPR&D") worldwide product rights to Vicineum as a result of the acquisition of Viventia in 2016. IPR&D assets acquired in a business combination are considered indefinite-lived until the completion or abandonment of the associated research and development efforts. We recognize an impairment loss when and to the extent that the estimated fair value of an intangible asset is less than its carrying value. In addition, on a quarterly basis, we perform a qualitative review of our business operations to determine whether events or changes in circumstances have occurred which could indicate that the carrying value of our intangible assets was not recoverable. If an impairment indicator is identified, an interim impairment assessment is performed. The fair value of the acquired intangible assets for the US and EU rights of Vicineum is determined using a risk-adjusted discounted cash flow approach, which includes probability adjustments for projected revenues and operating expenses based on the success rates assigned to each stage of development for each geographical region as well as discount rates applied to the projected cash flows.
Change in Fair Value of Contingent Consideration
In connection with the Viventia Acquisition in September 2016, we recorded contingent consideration pertaining to the amounts potentially payable to Viventia's shareholders pursuant to the terms of the Share Purchase Agreement among us, Viventia and the other signatories thereto and are based on regulatory approval in certain markets and future revenue levels. The fair value of contingent consideration is assessed at each balance sheet date and changes, if any, to the fair value are recognized in earnings (or loss) for the period.
Other Income, (Expense), Net
Other income, and expensenet consists primarily of interest income earned on cash and cash equivalents interestand, to a lesser extent, any gains or losses on foreign exchange.
Provision for Income Taxes
Benefit for income taxes is driven by the intangible impairment charge, changing the value of deferred tax liabilities. Provision for income taxes consists of income taxes incurred to non-US jurisdictions pursuant to our OUS business development partnership agreements, including the Qilu License Agreement.
Our Results of Operations
Comparison of the Years ended December 31, 2021 and 2020
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 Year ended December 31,Increase/(Decrease)
 20212020DollarsPercentage
 (in thousands, except percentages)
Revenue:
License and related revenue$26,544 $11,236 $15,308 136 %
Total revenue26,544 11,236 15,308 136 %
Operating expenses:
Research and development$25,312 $29,191 $(3,879)(13)%
General and administrative29,393 14,302 15,091 106 %
Restructuring charge5,528 — 5,528 — %
Intangibles impairment charge31,700 — 31,700 — %
Change in fair value of contingent consideration(56,840)(11,180)(45,660)408 %
Total operating expenses35,093 32,313 2,780 %
Loss from Operations(8,549)(21,077)12,528 (59)%
Other (expense) income:
Other (expense) income, net(60)125 (185)(148)%
Net Loss and Comprehensive Loss Before Taxes(8,609)(20,952)12,343 (59)%
Benefit (provision) for income taxes8,273 (1,445)9,718 (673)%
Net Loss and Comprehensive Loss After Taxes$(336)$(22,397)$22,061 (98)%
License Revenue
Revenue for the year ended December 31, 2021 was $26.5 million, primarily due to the $20 million milestone achieved pursuant to the Roche License Agreement upon initiating a Phase II clinical trial, $5.0 million related to the Qilu License Agreement (achievement of the IND milestone, clinical supply revenue, and license revenue for additional purchase price due to the recovery of VAT), and $1.5 million upfront milestone revenue achieved pursuant to the MENA License Agreement. Revenue for the year ended December 31, 2020 was $11.2 million, which was due to the recognition of revenue pursuant to the Qilu License Agreement.
Research and Development
Research and development expenses were $25.3 million for the year ended December 31, 2021, compared to $29.2 million for the year ended December 31, 2020. The decrease of $3.9 million was primarily due to lower costs associated with technology transfer and manufacturing ($7.4 million). This was partially offset by increases in employee-related compensation driven by increased headcount as part of the commercial build and the retention program implemented after receipt of the CRL in August 2021 ($2.1 million), regulatory and clinical consulting fees ($1.0 million)and certain other R&D expense, on outstanding debt,none of which were individually material ($0.5 million). We anticipate that R&D expenses will increase beginning in 2022 due to additional clinical trial activity costs related to our plans to conduct an additional Phase 3 clinical trial for Vicineum.
General and Administrative
General and administrative expenses were $29.4 million for the gain year ended December 31, 2021, compared to $14.3 million for the year ended December 31, 2020. The increase of $15.1 million was primarily due to increases in employee-related compensation ($5.0 million), legal costs ($4.8 million), and marketing and commercial expenses ($4.1 million) driven by preparation for the commercial launch of Vicineum prior to the issuance of the CRL in August 2021. Additionally, increases in accounting services ($0.4 million), insurance expenses ($0.4 million), IT expenses ($0.3 million) and others ($0.1 million) contributed to the increase.
Restructuring Charge
On August 30, 2021, we approved a restructuring plan to reduce operating expenses and better align our workforce with the needs of our business following receipt of the CRL from the FDA regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC (the “Restructuring Plan”). The Restructuring Plan included a reduction in our workforce by 18 positions
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(or lossapproximately 35% of our workforce) as well as additional cost-saving initiatives intended to preserve capital while we continue development of Vicineum.
Restructuring expenses were $5.5 million for the year ended December 31, 2021, compared to no restructuring expenses for the year ended December 31, 2020. The increase was due to one-time costs associated with the Restructuring Plan implemented in response to the CRL for severance and other employee-related costs ($2.8 million) and termination of certain contracts ($2.7 million).
Intangibles Impairment Charge
We recorded an intangibles impairment charge of $31.7 million during the year ended December 31, 2021. We did not record any impairment charges during the year ended December 31, 2020. In August 2021, we received a CRL from the FDA regarding our BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. The impairment charge of $31.7 million for the year ended December 31, 2021 relates to the full impairment of our US in-process research and development asset due to expected delays in the start of commercialization and lower probabilities of success, combined with higher operating expenses expected to be incurred prior to commercialization, resulting in lower expected future cash flows estimated in the US market at this time.
Change in Fair Value of Contingent Consideration
The non-cash change in fair value of contingent consideration was income of $56.8 million for the year ended December 31, 2021, compared to income of $11.2 million for the year ended December 31, 2020. The decrease in the fair value of our common and preferred stock warrant liability that were carried at fair value,contingent consideration of $45.7 million from the loss on extinguishment of debt and the expense relatedyear ended December 31, 2020 to the issuance costs allocated to warrants measured at fair value.
Critical Accounting Policies and Significant Judgments and Estimates
This management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which we have prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, and expenses and the disclosure of contingent assets and liabilities in our financial statements. On an ongoing basis, we evaluate our estimates and judgments, including those related to revenue recognition, accrued research and development expenses, stock-based compensation, fair value of warrants to purchase common stock, fair value of intangible assets and goodwill, income taxes including the valuation allowance for deferred tax assets, contingent consideration and going concern considerations. We base our estimates on historical experience, known trends and events and various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
While our significant accounting policies are described in more detail in the notes to our audited consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K, we believe the following accounting policies to be most critical to the judgments and estimates used in the preparation of our financial statements.
Revenue Recognition
We recognize revenue in accordance with Accounting Standards Codification, or ASC, Topic 605, Revenue Recognition and evaluate multiple-element arrangements based on the guidance in ASC Topic 605-25, Revenue Recognition-Multiple-Element Arrangements, or ASC 605-25. Revenues from license arrangements are recognized when persuasive evidence of an arrangement exists, delivery of goods or services has occurred, including title to the product, and associated risk of loss has passed to the customer, the price is fixed or determinable, collection from the customer has been reasonably assured, all performance obligations have been met, and any associated reductions of revenue can be reasonably estimated. We license
certain rights to our product candidates to third parties. Activities under licensing agreements are evaluated to determine if
they represent a multiple element arrangement. We identify the deliverables included within the agreement and
evaluate which deliverables represent separate units of accounting. We account for those components as separate
units of accounting if the following two criteria are met:

the delivered item or items have stand-alone value to the customer; and
delivery or performance of the undelivered item(s) is considered probable and substantially in our control, and the arrangement includes a general right of return relative to the delivered item(s).

Factors considered in this determination include, among other things, whether any other vendors sell the items separately and if the licensee could use the delivered item for its intended purpose withoutyear ended December 31, 2021, was driven by the receipt of a CRL from the remaining deliverables. The consideration that is fixed or determinable is allocatedFDA, regarding our BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. Due to the separate units of accounting based on the relative selling prices of each deliverable. The consideration allocated to each unit of accounting is recognized as the related goods and services are delivered. The amount allocable to the delivered units of accounting is limited to the amount that is not contingent upon the delivery of additional items or meeting other specified performance conditions.


We determine the selling price on the basis of vendor-specific objective evidence, orVSOE, third party evidence, or best estimate of selling price. VSOE is the price charged for a deliverable when it is sold separately. Third party evidence is the price that we or vendors charge for a similar deliverable when sold separately. Best estimate is the price at which we would sell the deliverable if the deliverable were sold by us regularly on a stand-alone basis.

In the case of our License Agreement with Roche, we concluded that the License Agreement contains the following deliverables: 1) an exclusive, worldwide license, including the right to sublicense, to its patent and know-how related to our monoclonal antibody EBI-031 or any other IL-6 antagonist anti-IL-6 monoclonal antibody; 2) IND regulatory clearance activities; 3) conduct a tissue cross-reactivity study; 4) transfer pre-clinical inventory, and 5) perform de minimus post-effective date services. We determined that the License Agreement contains four units of accounting. The de minimis post-effective date services were not determined to be substantive, and thus were not considered units of accounting. The $29.9 million of allocable arrangement consideration was allocated to each of the units of accounting using the relative selling price method based on our best estimate of selling price of each of the units of accounting. The best estimate of selling price of the license was calculated using a discounted cash flow model that included the following key assumptions: the development timeline of EBI-031, future revenue forecast for EBI-031, and an appropriate discount rate to discount the related cash flows and probability of successful development. The best estimate of selling price of the remaining deliverables was based on estimated costs plus a reasonable margin. The allocation of arrangement consideration was not particularly sensitive to changes in our best estimate of selling price given the significant value ascribed to the license deliverable.

When multiple deliverables are combined and accounted for as a single unit of accounting, we base our revenue recognition on the last element to be delivered using the straight-line or proportional performance method depending on our ability to estimate the timing of the delivery of the performance obligation. Amounts received or recorded as receivable prior to satisfying the associated revenue recognition criteria are recorded as deferred revenueinherent uncertainty in the consolidated balance sheets. Amounts not expected to be recognized within one year followingpath forward for Vicineum at this time, we reassessed the balance sheet date are classified as non-current deferred revenue.

If a future milestone payment under a license agreement is contingent upon the achievement of a substantive milestone, license revenue is recognized in its entirety in the period in which the milestone is achieved. Non-substantive milestone payments that are paid based on the passage of time or as a result of the licensee’s performance are allocated to the units of accounting within the arrangement and recognized as revenue when those deliverables are satisfied. A milestone is substantive if:

it can only be achieved based in whole or in part on either our performance or the occurrence of a specific outcome resulting from our performance;
there is substantive uncertainty at the date an arrangement is entered into that the event will be achieved; and
it would result in additional payments being due to us.

Options are considered substantive if, at the inception of the arrangement, we are at risk as to whether the licensee will choose to exercise the option. Factors that we consider in evaluating whether an option is substantive include the overall objective of the arrangement, the benefit the licensee might obtain from the arrangement without exercising the option, the cost to exercise the option and the likelihood that the option will be exercised. For arrangements under which an option is considered substantive, we do not consider the item underlying the option to be a deliverable at the inception of the arrangement and the associated option fees are not included in allocable arrangement consideration, assuming the option is not priced at a significant and incremental discount. Conversely, for arrangements under which an option is not considered substantive or if an option is priced at a significant and incremental discount, we would consider the item underlying the option to be a deliverable at the inception of the arrangement and a corresponding amount would be included in allocable arrangement consideration.

Commercial milestone and royalty payments received under license agreements are recognized as license revenue when they are earned.
Accrued Research and Development Expenses
As part of the process of preparing our consolidated financial statements, we are required to estimate our accrued expenses. This process involves reviewing quotes and contracts, identifying services that have been performed on our behalf and estimating the level of service performed and the associated cost incurred for the service when we have not yet been invoiced or otherwise notified of the actual cost. The majority of our service providers invoice us monthly in arrears for services performed or when contractual milestones are met. We make estimates of our accrued expenses as of each balance sheet date in our financial statements based on facts and circumstances known to us at that time. We periodically confirm the accuracy of our estimates with the service providers and make adjustments if necessary. The significant estimates in our accrued research and

development expenses are related to fees paid to CROs and other vendors in connection with research and development activities for which we have not yet been invoiced.
We base our expenses related to CROs on our estimates of the services received and efforts expended pursuant to quotes and contracts with CROs that conduct research and development on our behalf. The financial terms of these agreements are subject to negotiation, vary from contract to contract and may result in uneven payment flows. There may be instances in which payments made to our vendors will exceed the level of services provided and result in a prepayment of the research and development expense. In accruing service fees, we estimate the time period over which services will be performed and the level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from our estimate, we adjust the accrual or prepayment expense accordingly. Although we do not expect our estimates to be materially different from amounts actually incurred, our understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and could result in our reporting amounts that are too high or too low in any particular period. There have been no material changes in estimates for the periods presented.
Stock-based Compensation
We account for all stock-based compensation payments to employees, directors and non-employees using an option pricing model for estimating fair value. Accordingly, stock-based compensation expense is measured based on the estimated fair value of the awards on the date of grant, net of estimated forfeitures. We recognize stock-based compensation expense for the portion of the award that is ultimately expected to vest over the period during which the recipient renders the required services to us using the straight-line method. In accordance with authoritative guidance, we remeasure the fair value of non-employee stock-based awards as the awards vest, and recognize the resulting value, if any, as expense during the period the related services are rendered.
Significant Factors, Assumptions and Methodologies Used in Determining Fair Value
We apply the fair value recognition provisions of ASC Topic 718, Compensation-Stock Compensation, or ASC 718. Determining the amount of stock-based compensation to be recorded requires usassumptions used to develop estimates of the fair value of stock options as of their grant date. We recognize stock-based compensation expense for service-based awards ratably overrevenue projections upon which the requisite service period, which in most cases is the vesting period of the award. Calculating the fair value of stock-based awards requires that we make highly subjective assumptions.
We use the Black-Scholes option pricing model to value our stock option awards. Use of this valuation methodology requires that we make assumptions as to the volatility of our common stock, the expected term of our stock options, the risk free interest rate for a period that approximates the expected term of our stock options and our expected dividend yield. As a new public company, we do not have sufficient history to estimate the volatility of our common stock price or the expected life of the options. We calculate expected volatility based on reported data for similar publicly traded companies for which historical information is available and will continue to do so until the historical volatility of our common stock is sufficient to measure expected volatility for future option grants. During the periods we were a privately held company with a limited operating history, we utilized data from a representative group of public companies to estimate expected stock price volatility. We selected companies from the biopharmaceutical industry with similar characteristics to us, including those at a similar stage of development and with a similar therapeutic focus.
We use the “simplified method” to estimate the expected term of stock option grants to employees. Under this approach, the weighted-average expected life is presumed to be the average of the contractual term (ten years) and the vesting term (generally four years) of our stock options, taking into consideration multiple vesting tranches. We utilize this method due to a lack of historical exercise data and the plain-vanilla nature of our share-based awards. We have never paid, and do not anticipate paying, any cash dividends in the foreseeable future, and therefore use an expected dividend yield of zero in the option-pricing model. The risk-free rate is based on the yield curve of U.S. Treasury securities with periods commensurate with the expected term of the options being valued. The fair value of each stock option granted to employees and directors is estimated on the date of grant using the Black-Scholes option-pricing model based on the assumptions noted in the following table:
 Year Ended December 31,
 2016 2015 2014
Risk-free interest rate1.23-2.38% 1.42-1.92% 1.67-2.02%
Expected dividend yield—% —% —%
Expected term (in years)5.5-6 5.75-6 5.75-6
Expected volatility71.44-92.09% 69.06-74.11% 60.00-69.58%

We are also required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from our estimates. We use historical data to estimate pre-vesting option forfeitures and record stock-based compensation expense only for those awards that are expected to vest. To the extent that actual forfeitures differ from our estimates, the difference is recorded as a cumulative adjustment in the period the estimates are revised. Stock-based compensation expense recognized in the financial statements is based on awards that are ultimately expected to vest.
Business Combinations
On September 20, 2016, we completed our acquisition of Viventia for total consideration of $59.7 million, consisting of common stock consideration of $13.5 million and contingent consideration with an estimated fair value of $46.2 million. Future changes in our estimates of contingent consideration may impact research and development expense in future periods. The estimated fair value of the contingent consideration is based uponbased. The most significant and impactful assumptions regardingin our revenue projection models are timing of product launch and probabilities of successful achievementclinical and regulatory success POS; we expect delays in the start of related milestones, the estimated timing in which the milestones are achievedcommercialization and discount rates. The estimated fair value could materially differ from actual values or fair values determined using different assumptions.
This transaction was accounted forestimate lower POS as a business combination under the purchase method of accounting. Accordingly, the tangible assets and identifiable intangible assets acquired and liabilities assumed were recorded at fair value asdirect result of the dateCRL and our withdrawal of acquisition,the MAA. We will need to conduct an additional clinical trial, which will lead to delays in the start of commercialization globally. We have assessed a range of commercialization timeline assumptions and applied a probability to each outcome based on management’s best estimate. In addition, we now assume a lower POS in achieving certain clinical and regulatory milestones in the range of approximately 45% to 55% globally. We participated in Type A Meetings with the remaining purchase price recorded as goodwill. The estimated fair values of acquired assetsFDA on October 29, 2021 and assumed liabilities were determined using the methods discussedDecember 8, 2021 to discuss questions related to CMC and clinical issues raised in the following paragraphs and require significant judgmentCRL. Both meetings helped us determine the appropriate path forward for Vicineum. Any changes in these assumptions and estimates which could materially differ from actual values and fair values determined using different methods or assumptions.
The purchase accounting for our acquisition of Viventia is preliminary and subject to completion upon obtaining the necessary remainingother information which principally includes information with respect to the market for Vicinium outside the U.S. We are in the process of obtaining this information and will update the valuation for the changes as the information is obtained. Changes to these assumptions could cause an impact to (1) the valuation of contingent consideration, (2) the identification and valuation of assets acquired, including intangible assets and related goodwill and (3) the related tax impacts of the acquisition. We have preliminarily valued the acquired assets and liabilities based on their estimated fair value. The preliminary fair values included in the consolidated balance sheet as of December 31, 2016 are based on our best estimates. Any adjustments to the preliminary fair values will be made as such information becomes available, but no later than September 19, 2017.
Goodwill
Goodwill represents the difference between the purchase price and the fair value of the identifiable tangible and intangible net
assets when accounted for using the purchase method of accounting. Goodwill is not amortized, but is reviewed for impairment. We test our goodwill for impairment annually, or whenever events or changes in circumstances indicate an impairmentobtained, may have occurred, by comparing its carrying value to its implied fair value in accordance with ASC Topic 350, Intangibles - Goodwill and Other, or ASC 350. Impairment may result from, among other things, deterioration in the performance of the acquired asset, adverse market conditions, adverse changes in applicable laws or regulations and a variety of other circumstances. If we determine that an impairment has occurred, a write-down of the carrying value and an impairment charge to operating expenses in the period the determination is made is recorded. In evaluating the carrying value of goodwill, we must make assumptions regarding estimated future cash flows and other factors to determine the fair value of the acquired assets. Changes in strategy or market conditions could significantlysignificant impact those judgments in the future and require an adjustment to the recorded balances. We have not recognized any impairment charges related to goodwill.
Indefinite-Lived Intangible Assets
In accordance with ASC 350, during the period that an asset is considered indefinite-lived, such as in-process research and development, or IPR&D, it will not be amortized. Acquired IPR&D represents the fair value assigned to research and development assets that have not reached technological feasibility. The value assigned to acquired IPR&D is determined by estimating the costs to develop the acquired technology into commercially viable products, estimating the resulting revenue from the projects, and discounting the net cash flows to present value. The revenue and costs projections used to value acquired IPR&D are, as applicable, reduced based on the probabilityremeasurement of success of developing a new drug. Additionally, the projections consider the relevant market sizes and growth factors, expected trends in technology, and the nature and expected timing of new product introductions by us and our competitors. The rates utilized to discount the net cash flows to their present value are commensurate with the stage of development of the projects and uncertainties in the economic estimates used in the projections. Upon the acquisition of IPR&D, we complete an assessment of whether its acquisition constitutes the purchase of a single asset or a group of assets. Multiple factors are considered in this assessment, including the nature of the technology acquired, the presence or absence of separate cash flows, the development process and stage of completion, quantitative significance and the rationale for entering into the transaction. Indefinite-lived assets are maintained on our consolidated

balance sheet until either the project underlying it is completed or the asset becomes impaired. Indefinite-lived assets are tested for impairment on an annual basis, or whenever events or changes in circumstances indicate the reduction in the fair value of the IPR&D asset is below its respective carrying amount. If we determine that an impairment has occurred, a write-down of the carrying value and an impairment charge to operating expenses in the period the determination is made is recorded. When development of an IPR&D asset is complete the associated asset would be deemed finite-lived and would then be amortized based on its respective estimated useful life at that point.
Contingent Consideration
Each reporting period, we revalue the contingent consideration obligations associated with business combinations to their fair value and record increases in their fair value as contingent consideration expense and decreasesliability in the fair value as contingent consideration income. Changes in contingent consideration result from changes in the assumptions regarding probabilities of successful achievement of regulatory milestones and commercial sales, the period in which these milestones and sales are expected to be achieved, the level of commercial sales of Vicinium, and discount rates used to estimate the fair value of the liability. Significant changes in any of these assumptions would result in a significantly higher or lower fair value measurement.future
Recently Issued Accounting Pronouncements
See Note 2 within the notes to our audited consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K for a discussion on recently issued accounting pronouncements.
Emerging Growth Company Status
The JOBS Act permits an “emerging growth company” such as us to take advantage of an extended transition period to comply with new or revised accounting standards applicable to public companies until those standards would otherwise apply to private companies. We have irrevocably elected to “opt out” of this provision and, as a result, we will comply with new or revised accounting standards as required when they are adopted.
Results of Operations
Comparison of the Years Ended December 31, 2016 and 2015
 
Year ended
December 31,
  
 2016 2015 Change
 (in thousands)
Revenue:     
Collaboration revenue$406
 $490
 $(84)
License revenue29,575
 500
 29,075
Total revenue29,981
 990
 28,991
Operating expenses:     
Research and development13,479
 26,336
 (12,857)
General and administrative14,736
 9,850
 4,886
(Gain) loss from change in fair value of contingent consideration(1,100) 
 (1,100)
Total operating expenses27,115
 36,186
 (9,071)
Income (loss) from operations2,866
 (35,196) 38,062
Other income (expense), net(970) 1,744
 (2,714)
Net income (loss) before income taxes1,896
 (33,452) 35,348
     Provision for income taxes5
 

5
Net income (loss) and comprehensive income (loss)$1,891
 $(33,452)
$35,343
Revenue. Revenue was $30.0 million for the year ended December 31, 2016 compared to $1.0 million for the year ended December 31, 2015. The increase was due primarily to revenue recognized related the fees and a milestone payment received

from Roche under the License Agreement, which was partially offset by reduced fees under our former collaboration agreement with ThromboGenics.
Research and development expenses. Research and development expenses were $13.5 million for the year ended December 31, 2016 compared to $26.3 million for the year ended December 31, 2015. The decrease of $12.9 million was due primarily to a decrease of $12.8 million of isunakinra-related development expenses, which development activities are no longer ongoing, as well as decreases in EBI-031 related development expenses of $2.4 million due to the License Agreement with Roche. These decreases were partially offset by increases in Vicinium related development expenses since September 20, 2016, the date of acquisition, of $1.6 million. In addition, employee and contractor-related expenses, including stock-based compensation and severance, were $5.9 million for the year ended December 31, 2016 compared to $4.8 million for the year ended December 31, 2015.
General and administrative expenses. General and administrative expenses were $14.7 million for the year ended December 31, 2016 compared to $9.9 million for the year ended December 31, 2015. The increase of $4.9 million was due primarily to increased severance, retention and stock-based compensation expenses and professional fees related to the License Agreement with Roche, our review of strategic alternatives and the acquisition of Viventia.
(Gain) loss from change in fair value of contingent consideration. The change in fair value of contingent consideration was $(1.1)income of $11.2 million for the year ended December 31, 2016 due2020. This was primarily attributable to the increase in thesignificantly higher discount rate. There was no change in the fair valuerates as a result of the contingent consideration forfinancial market conditions as of the year ended December 31, 2015.2020, offset by changes to the competitive landscape.
Other (expense) income, (expense), net.
Other income (expense),expense, net was $(1.0)$0.1 million for the year ended December 31, 20162021, compared to $1.7other income of $0.1 million for the year ended December 31, 2015.2020. The change of $(2.7)$0.2 million was due primarily to lower interest income.
Provision for Income Taxes
For the decrease intwelve months ended December 31, 2021, we recorded a benefit from income taxes of $8.3 million. In the change inthird quarter of 2021, we determined that the fair value of our warrantthe Vicineum United States in-process research and development asset was zero, which resulted in an impairment charge of $31.7 million. In connection with this impairment charge, in the third quarter of 2021, we wrote-down the associated deferred tax liability from $3.1by $8.6 million in 2015as a benefit. Please refer to $0.1 million in 2016. In addition, there wasNote 8, "Intangible Assets and Goodwill," for further information regarding the impairment charge. For the twelve months ended December 31, 2020, we recorded a loss on extinguishmentprovision for income taxes of debt in 2016 of $0.9 million associated with the prepayment of the loan with Silicon Valley Bank, or SVB. These changes were partially offset by a decrease in interest expense from $1.4 million in 2015. This provision consisted of income taxes paid to $0.2 million in 2016.non-US jurisdictions pursuant to our commercialization partnership agreements.
Comparison of the Years Endedended December 31, 20152020 and 20142019
 
Year ended
December 31,
  
 2015 2014 Change
 (in thousands)
Revenue:     
Collaboration revenue$490
 $2,243
 $(1,753)
License revenue500
 
 500
Total revenue990
 2,243
 (1,253)
Operating expenses:     
Research and development26,336
 26,703
 (367)
General and administrative9,850
 8,471
 1,379
Total operating expenses36,186
 35,174
 1,012
Loss from operations(35,196) (32,931) (2,265)
Other income (expense), net1,744
 (1,225) 2,969
Net loss and comprehensive loss$(33,452) $(34,156) $704
Revenue. Revenue was $1.0 millionFor a comparison of our results of operations for the years ended December 31, 2020 and 2019, see "Part II - Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations" of our Annual Report on Form 10-K for the fiscal year ended December 31, 2015 compared to $2.2 million for the year ended
December 31, 2014. The decrease of $1.3 million was due largely to less revenue recognized pursuant to the ThromboGenics
collaboration agreement. The decrease was partially offset by $0.5 million of revenue recognized from a license agreement entered into in December 2015.
Research and development expenses. Research and development expenses were $26.3 million for the year ended December 31, 2015 compared to $26.7 million for the year ended December 31, 2014. The decrease of $0.4 million was due primarily to a one-time license fee paid in 2014, in connection2020, filed with the license agreement with The Schepens Eye Research Institute. In addition, there was a decrease of $5.4 million of isunakinra-related development expenses, basedUnited States Securities and Exchange Commission ("SEC") on our decision to discontinue development of isunakinra due to results obtained in our two Phase 3 clinical trials in patients with dry eye disease and allergicMarch 15, 2021.

conjunctivitis. This decrease in isunakinra-related development expenses was offset by increases in EBI-031 related development expenses of $5.4 million during the year ended December 31, 2015, which were incurred as part of our chemistry, manufacturing, and controls development work and nonclinical safety studies to support the submission of an IND to the FDA.
General and administrative expenses. General and administrative expenses were $9.9 million for the year ended December 31, 2015 compared to $8.5 million for the year ended December 31, 2014. The increase of $1.4 million was due primarily to increased operating costs as a result of our continued transition from a private company to a public company, including legal, accounting, insurance and investor relations expenses. In addition, we incurred professional fees related to our pursuit of collaborative or
other strategic opportunities during the year ended December 31, 2015.
Other income (expense), net. Other income (expense), net was $1.7 million for the year ended December 31 2015 compared to
$(1.2) million for the year ended December 31, 2014. The change of $3.0 million was due primarily to the decrease in the fair
value of our warrant liability partially offset by an increase in interest expense associated with additional borrowings from
SVB.
Liquidity and Capital Resources
SourcesOverview
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As of LiquidityDecember 31, 2021, we had cash and cash equivalents of $162.6 million, net working capital of $194.0 million and an accumulated deficit of $316.3 million. We incurred negative cash flows from operating activities of $68.9 million, $30.8 million and $37.5 million for the years ended December 31, 2021, 2020 and 2019, respectively. We believe that our cash and cash equivalents of $162.6 million as of December 31, 2021, are sufficient to fund our operating plan into 2024.
Since our inception, we have incurred significantreceived no revenue from sales of our products, and we anticipate that operating losses and expect towill continue to incur operating losses for the foreseeable future. Substantially allfuture as we seek to address the issues raised in the CRL we received for our BLA for Vicineum for the treatment of our revenue to date has beenBCG-unresponsive NMIBC and the concerns identified in the EMA Withdrawal Assessment Report, complete an additional Phase 3 clinical trial for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and seek marketing approval from the License AgreementFDA and to a lesser extent, from our former collaboration agreement with ThromboGenics. To date, wethe European Commission and, if approved, commercialize Vicineum. We have financed our operations to date primarily through private placements of our common stock, preferred stock, common stock warrants and convertible bridge notes, convertible into our preferred stock, venture debt borrowings, our IPO, follow-on public offerings, sales effected in an “at-the-market” offering throughATM offerings, our agent, Cowen, the License Agreement with RocheOUS business development partnerships and license agreements and, to a lesser extent, from our former collaboration agreement with ThromboGenics.a collaboration.
In June 2016,November 2019, we entered into an Open Market Sale Agreement (the "Sale Agreement") with Jefferies LLC ("Jefferies"), under which we may issue and sell shares of our common stock, par value $0.001 per share from time to time for an aggregate sales price of up to $35 million through Jefferies (the "ATM Offering"). In October 2020 and February 2021, we entered into Amendments No. 1 and No. 2 to the LicenseSale Agreement, with Rocherespectively. Amendments No. 1 and receivedNo.2 modified the Sale Agreement to reflect that we may issue and sell shares of our common stock from time to time for an up-front license feeaggregate sales price of $7.5 million and up to an additional $262.5$50.0 million uponand $34.5 million, respectively. In June 2021, we entered into Amendment No. 3 to the achievementSale Agreement, which modified the Sale Agreement to remove the maximum dollar amount of specified regulatory, developmentshares of common stock that may be sold pursuant to the Sale Agreement. In June and commercial milestonesJuly 2021, we filed prospectus supplements with respect to up to two unrelated indications. Specifically, an aggregate amountthe SEC in connection with the offer and sale of up to $197.5an aggregate of $200 million is payable to us for the achievement of specified milestones with respectour common stock pursuant to the first indication: consistingSale Agreement. Sale of $72.5 millioncommon stock under the Sale Agreement are made by any method that is deemed to be an ATM offering as defined in development milestones, $50.0 million in regulatory milestones and $75.0 million in commercialization milestones. We received the first development milestone payment of $22.5 million as a resultRule 415(a)(4) of the INDSecurities Act of 1933, including but not limited to sales made directly on or through the Nasdaq Global Market or any other existing trading market for EBI-031 becoming effective. In addition, we are entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% for net sales of potential future products containing EBI-031 and at up to 50% of these rates for net sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to the buy-out options of Roche.
Cash Flows
our common stock. As of December 31, 2016,2021, we had cashhave $97.8 million in available ATM capacity.We may sell shares of our common stock efficiently from time to time but have no obligation to sell any of our common stock and cash equivalentsmay at any time suspend offers under the Sale Agreement or terminate the Sale Agreement. Subject to the terms and conditions of $25.3 million. Cash in excessthe Sale Agreement, Jefferies will use its commercially reasonable efforts to sell common stock from time to time, as the sales agent, based upon our instructions, which include a prohibition on sales below a minimum price set by us from time to time. We have provided Jefferies with customary indemnification rights, and Jefferies is entitled to a commission at a fixed rate equal to 3.0% of immediate requirements is invested in accordance with our investment policy, with a view primarily to liquidity and capital preservation.
The following table sets forth the primary sources and uses of cashgross proceeds for each sale of common stock under the periods set forth below:
 Year ended December 31,
 2016 2015 2014
 (in thousands)
Net cash provided by (used in):     
Operating activities$2,622
 $(34,529) $(29,307)
Investing activities461
 (287) (137)
Financing activities(13,820) 16,836
 75,561
Net (decrease) increase in cash and cash equivalents$(10,737) $(17,980) $46,117
Operating activities. Net cash provided by operating activities was $2.6Sale Agreement. We raised $175.0 million of net proceeds from the sale of 56.9 million shares of common stock at a weighted-average price of $3.17 per share during the year ended December 31, 2021. We raised $38.0 million of net proceeds from the sale of 33.4 million shares of common stock at a weighted-average price of $1.17 per share during the year ended December 31, 2020. Share issue costs, including sales agent commissions, related to the ATM Offering totaled $5.4 million and $1.2 million for the year ended December 31, 2016,2021 and consisted primarily of a net income of $1.9 million adjusted for non-cash items, including stock-based compensation expense of $4.0 million, depreciation expense of $0.2 million, a net change of $(0.1) million inDecember 31, 2020, respectively.
We continue to monitor the fair valueeffect of the warrant liability,outbreak of COVID-19. We are proactively executing risk mitigation strategies to attenuate the impact of COVID-19 on us, and at this time, we have not yet experienced any business disruptions as a

net change of $(1.1) million in the fair value result of the contingent consideration, $0.2 million losspandemic. We are continually assessing the effect of the COVID-19 pandemic on extinguishmentour operations, and we are monitoring the spread of debtCOVID-19 and a net change in operating assetsthe actions implemented to combat the virus throughout the world.
Funding Requirements
Our future success is dependent on our ability to develop and, liabilities of $(2.5) million.
Net cash used in operating activities was $34.5 millionif approved, commercialize our product candidates, including Vicineum for the year ended December 31, 2015, and consisted primarilytreatment of a net loss of $33.5 million adjusted for non-cash items, including stock-based compensation expense of $2.5 million, depreciation expense of $0.4 million, a net change of $(3.1) million in the fair valuenon-muscle invasive CIS of the warrant liabilitybladder in patients previously treated with adequate or less than adequate BCG, and ultimately upon our ability to attain profitable operations. In order to commercialize our product candidates, including Vicineum, we need to complete clinical development and comply with comprehensive regulatory requirements. We are subject to a net change in operating assetsnumber of risks similar to other late-stage clinical companies, including, but not limited to, successful discovery and liabilitiesdevelopment of $(1.0) million.
Net cash used in operating activities was $29.3 millionour product candidates, raising additional capital, development and commercialization by our competitors of new technological innovations, protection of proprietary technology and market acceptance of our products. The successful discovery, development and, if approved, commercialization of product candidates, including Vicineum for the year ended December 31, 2014,treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, requires substantial working capital, and consisted primarily of a net
loss of $34.2 million adjusted for non-cash items, including stock-based compensation expense of $2.4 million, loss on extinguishment ofwe expect to seek additional funds through equity or debt of $0.5 million, depreciation expense of $0.4 million, expense relatedfinancings or through additional OUS business development partnerships, collaborations, licensing transactions or other sources. We may be unable to the issuance costs allocatedobtain equity or debt financings or enter into additional OUS business development partnerships, collaborations, or licensing transactions at favorable terms, or at all, and, if necessary, we may be required to
warrants measured at fair value of $0.3 million, change in fair value of warrant liability of $0.1 million and a net change in
operating assets and liabilities of $1.1 million.
Investing activities. Net cash provided by (used in) investing activities consists of sales and purchases of property and
equipment. For the year ended December 31, 2016, we had cash proceeds from the sale of property and equipment of $0.3 million. We also acquired $0.1 million of cash from the acquisition of Viventia. For the year ended December 31, 2015, we purchased $0.3 million of property and equipment. For the year ended December 31, 2014, we purchased $0.1 million of property and equipment.
Financing activities. Net cash used in financing activities for the year ended December 31, 2016 was $13.8 million and consisted primarily of repayment of outstanding debt obligations. On March 1, 2016, we prepaid all outstanding amounts
owed to SVB and terminated our loan agreement with SVB. This was partially offset by proceeds from the exercise of stock options of $0.3 million.
Net cash provided by financing activities for the year ended December 31, 2015 was $16.8 million and consisted primarily of net proceeds of $12.7 million from the issuance of common stock in connection with sales effected in an “at-the-market” offering through our agent, Cowen, and $5.0 million from additional borrowings under our loan with SVB. These amounts were partially offset by payments of notes payable of $0.9 million.
Net cash provided by financing activities for the year ended December 31, 2014 was $75.6 million and consisted primarily of net proceeds from our IPO and the net proceeds from the private placement of common stock completed in December 2014. We received aggregate net proceeds from the IPO of $50.2 million, after deducting underwriting discounts and commissions and other offering expenses payable by us, of which $1.3 million were paid in 2013. We received aggregate net proceeds from the private placement of $18.2 million, after deducting placement agent’s fees and other offering expenses payable by us, of which $1.3 million were paid in 2014.
Funding Requirements implement cost reduction strategies.
We will incur substantial expenses if and as we:
continue
79


address the issues identified in the CRL we received from the FDA for our plannedBLA for Vicineum for the treatment of BCG-unresponsive NMIBC and the concerns identified in the EMA Withdrawal Assessment Report, including the completion of an additional Phase 3 clinical trial for Vicinium and initiate our Phase 2 clinical trial for Proxinium;trial;
continue the research and pre-clinical and clinical development of our other product candidates;
seek to discover and develop additional product candidates;
in-license or acquire the rights to other products, product candidates or technologies;
seek marketing approvals for any product candidates that successfully complete clinical trials;Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
establish and implement sales, marketing and distribution capabilities and scale up and validate external manufacturing capabilities (including completing the manufacturing process and technology transfer to any third-party manufacturers) to commercialize any product candidatesVicineum for which we may obtain marketing approval;the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved;
maintain, expand and protect our intellectual property portfolio;
add equipment and physical infrastructure to support our research and development;
hire additional clinical, regulatory, quality control, scientific and management personnel; and
expand our operational, financial and management systems and personnel.personnel;

conduct research and pre-clinical and clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and our other product candidates;
We believe that our cashseek to discover and cash equivalents of $25.3 million as of December 31, 2016 will be sufficientdevelop additional product candidates; and
in-license or acquire the rights to fund our current operating plan into early 2018; however, we have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect.other products, product candidates or technologies.
Our future capital requirements will depend on many factors, including:
the scope, initiation, progress, timing, costs and results of clinical trials for our product candidates;
the scope, progress, results and costs of pre-clinical development and laboratory testing and clinical trials for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and our pre-clinicalother product candidates;candidates, including an additional Phase 3 clinical trial for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
the ongoing COVID-19 pandemic and its impact on our business
our ability to establish additional OUS business development partnerships, collaborations,or licensing arrangements on favorable terms, if at all, particularly manufacturing, marketing and distribution arrangements for our product candidates;
the costs and timing of the implementation of commercial-scale manufacturing activities;
the costs and timing of establishing and implementing sales, marketing and distribution capabilities for any product candidatesVicineum for which we may receive regulatory approval;the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved;
the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending any intellectual property-related claims;
our obligation to make milestone, royalty and other payments to third partythird-party licensors under our licensing agreements;
the extent to which we in-license or acquire rights to other products, product candidates or technologies;
the outcome, timing and cost of regulatory review by the FDA, EMA, and comparable foreignnon-US regulatory authorities for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, including the potential for the FDA or comparable foreignnon-US regulatory authorities including Health Canada, to require that we perform more studies or clinical trials than those that we currently expect;expect to perform;
our ability to achieve certain future regulatory, development and commercialization milestones under the License Agreement with Roche;our out-license and commercialization OUS business development partnership agreements;
the effect of competing technological and market developments; and
the revenue, if any, received from commercial sales of any product candidatesVicineum for which we receive regulatory approval.the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved.
Until such time, if ever, as we can generate substantial product revenues from commercial sales, we expect to finance our cash needs through a combination of equity offerings, debt financings, government or other third-party funding, collaborations, strategic OUS business development partnerships,alliances, licensing arrangements and marketing and distributionlicensing arrangements. We do not have any committed external source of funds other than the amounts payable under the License Agreement with Roche.our out-license and OUS business development partnership agreements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, our stockholders’the ownership interestinterests of existing stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect our stockholders’the rights as holders of our common stock.existing stockholders. Debt financing and equity financing, if available, may involve agreements that include liens or
80


other restrictive covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise additional funds through government or other third-party funding, collaborations, strategic OUS business development partnerships, alliances licensing arrangements or marketing and distributionlicensing arrangements, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market products or product candidates that we would otherwise prefer to develop and market ourselves.
The COVID-19 pandemic has negatively impacted the global economy, disrupted business operations and created significant volatility and disruption to financial markets. Significant uncertainty remains as to the potential impact of the COVID-19 pandemic on our operations, and on the global economy as a whole. The extent and duration of the pandemic could continue to disrupt global markets and may affect our ability to raise additional capital in the future.
Contractual Obligations and CommitmentsOther Obligations
For information related to our cash requirements from known contractual and other obligations, see the description of Contingent Consideration in Note 5 “Fair Value Measure and Financial Instruments,” as well as the description of our leases in Note 7 “Property and Equipment”, and the description of our license agreement and collaborations in Note 17, “License Agreements” of Part IV - Item 15. Exhibits and Financial Statements - Notes to Consolidated Financial Statements.
Cash Flows
The following table summarizessets forth a summary of our contractual obligations atcash flows for the years ended December 31, 2016:2021, 2020 and 2019 (in thousands):
Year ended December 31,
 202120202019
Net Cash Used in Operating Activities$(68,878)$(30,837)$(37,521)
Net Cash Used in Investing Activities(4)(8)(136)
Net Cash Provided by Financing Activities176,129 38,113 35,356 
Net Increase in Cash, Cash Equivalents and Restricted Cash$107,247 $7,268 $(2,301)
 Total Less than 1 Year 1 to 3 Years 3 to 5 Years More than 5 Years
 (in thousands)
Operating lease obligations(1)$1,138
 $324
 $592
 $222
 $
License maintenance fees(2)1,329
 180
 360
 360
 429
Total fixed contractual obligations$2,467
 $504
 $952
 $582
 $429
Net Cash Used in Operating Activities

(1) We lease our manufacturing facility locatedNet cash used in Winnipeg, Manitoba Canada,operating activities was $68.9 million for the year ended December 31, 2021 and consisted primarily of a net loss of $0.3 million, which consistsincludes $26.5 million of an approximately 31,400 square foot manufacturing, laboratory, warehouse and office facility, underrevenue recognized pursuant to the Roche License Agreement upon Roche initiating a five-year renewable lease through September 2020. The monthly rent for this office space is approximately $25,000 per month. We entered into a short-term lease for our corporate headquarters in Cambridge, Massachusetts in October 2016 and the initial termPhase II clinical trial, achievement of the lease is through July 2017. The monthly rentIND milestone in China pursuant to the Qilu License Agreement, clinical supply revenue resulting from the delivery of drug product to Qilu, our OUS partner for this office space is approximately $4,000 per month.
(2) We have entered into variousGreater China, and license agreements that, upon successful clinicalrevenue for additional purchase price due to the recovery of VAT by our OUS business development contingently trigger payments upon achievementpartner for Greater China, adjusted for non-cash items, including share-based compensation of certain milestones, royalties and other such payments. See ‘‘License Agreements’’ below. Because the achievement of these milestones are uncertain, the amounts have not been included.
We enter into agreements$5.1 million, a decrease in the normal coursefair value of business with CROscontingent consideration of $56.8 million, impairment charge of $31.7 million and a net decrease in operating assets and liabilities of $48.6 million.
Net cash used in operating activities was $30.8 million for clinical trialsthe year ended December 31, 2020 and with vendorsconsisted primarily of a net loss of $22.4 million, adjusted for pre-clinical studies, license agreements and other services and products for operating purposes which are cancelable by us, upon prior written notice. We have an agreement withnon-cash items, including depreciation of $0.1 million, share-based compensation of $1.8 million, a CRO that may be terminated at any time with 30 days’ notice; however, upon termination, we would be required to pay all costs incurred bychange in the CRO up to the termination date, plus an additional fee, which
is calculated as an amount equal to either (a) 5%fair value of the unearned feescontingent consideration of $11.2 million and a net increase in operating assets and liabilities of $0.9 million.
Net cash used in operating activities was $37.5 million for services as providedthe year ended December 31, 2019 and consisted primarily of a net loss of $107.5 million, adjusted for non-cash items, including depreciation of $0.2 million, share-based compensation of $1.2 million, a change in the budget if we have paid 50%fair value of contingent consideration of $71.6 million and a net decrease in operating assets and liabilities of $3.1 million.
Net Cash Used in Investing activities
Net cash used in investing activities consisted of de minimis purchases and sales or moreproperty and equipment during each of the total fees for services as specified in the work order or (b) 3% of the amount of fees we have paid for services as of the date of termination if we have paid less than 50% of the total fees for services as specified in the work order. As ofyears ended December 31, 2016, we have been invoiced $3.12021, and 2020 and $0.1 million for the year ended December 31, 2019.
Net Cash Provided by Financing activities
Net cash provided by financing activities was $176.1 million for the year ended December 31, 2021 and consisted of $175.0 million in fees for servicesnet proceeds from this CRO, which is less than 50% of the total fees for services as specified in the current work order with this CRO. Therefore, as of December 31, 2016, we would have been required to pay a termination fee of 3% of the amount of fees as of the date of termination of this agreement, which would have equaled $94,000 as of December 31, 2016. Amounts owed to such CRO were not included in the ‘‘Contractual Obligations and Commitments’’ table above as it was considered a contingent payment as of December 31, 2016.
We also lease office space in Philadelphia, PA, where we occupy office space under a lease that was executed in September 2015. The initial term of the lease expired in August 2016, after which the lease has continued on a month-to-month basis unless terminated by either party by giving the requisite notice. The monthly rent for this office space is approximately $5,000 per month. We also occupy office space in Toronto, Ontario, Canada with rent of approximately $2,000 per month, on a month-to-month lease, which can be terminated by either party by giving 30 days written notice. These payments are not included in the ‘‘Contractual Obligations and Commitments’’ table above.
In connection with the acquisition of Viventia, we are obligated to pay to the sellers certain post-closing contingent cash payments upon the achievement of specified milestones and based upon net sales, in each case subject to the terms and conditions set forth in the acquisition agreement, including: (i) a one-time milestone payment of $12.5 million payable upon the first sale of Vicinium or any variant or derivative thereof, other than Proxinium, in the United States; (ii) a one-time milestone payment of $7.0 million payable upon the first sale of the Purchased Product in any one of certain specified European countries; (iii) a one-time milestone payment of $3.0 million payable upon the first sale of the Purchased Product in Japan; and (iv) and quarterly earn-out payments equal to two percent (2%) of net sales of the Purchased Product during specified earn-out periods. Such earn-out payments are payable with respect to net sales in a country beginning on the date of the first sale in such country and ending on the earlier of (i) December 31, 2033 and (ii) fifteen years after the date of such sale, subject to early termination in certain circumstances if a biosimilar product is on the market in the applicable country. Because the achievement of these milestones is uncertain, the amounts have not been included in the ‘‘Contractual Obligations and Commitments’’ table above.
License Agreements
License Agreement with the University of Zurich
We have a license agreement with Zurich, which grants us exclusive license rights, with the right to sublicense, to make, have made, use and sell under certain patents primarily directed to our targeting agent, including EpCAM chimera and related immunoconjugates and methods of use and manufacture of the same. These patents cover some key aspects of our product candidates Vicinium and Proxinium.
Under the terms of the agreement, we may be obligated to pay $0.8 million in milestone payments, for the first product candidate that achieves applicable clinical development milestones. Based on current clinical status, we anticipate that these milestones may be triggered by Vicinium’s clinical development pathway. As part of the consideration, we will also be obligated to pay up to a 4% royalty on the net product sales for products covered by or manufactured using a method covered by a valid claim in the Zurich patent rights. We have the right to reduce the amount of royalties owed to Zurich if the total royalty rate owed by us to Zurich and any other third party is 10% or greater, provided that the royalty rate may not be less than 2% of net sales. The obligation to pay royalties in a particular country expires upon the expiration or termination of the last of

the Zurich patent rights that covers the manufacture, use or sale of a product. There is no obligation to pay royalties in a country if there is no valid claim that covers the product or a method of manufacturing the product.
License Agreement with Merck KGaA
We have a license agreement with Merck, which grants us an exclusive license, with the right to sublicense, under certain patents and technology relating to the de-immunization of our cytotoxin Bouganin for therapeutic and in vivodiagnostic purposes in humans. The de-immunized cytotoxin is known as deBouganin and has been incorporated in to our product candidates, VB6-845d. We have the worldwide exclusive right, with the right to sublicense,common stock under the licensed patents and technology to, among other things, make, have made, use or sell products incorporating deBouganin.
Under the agreement, we may be obligated to make milestone payments in respect of certain stages of regulatory approval reached by a product candidate generated by this technology or covered by a licensed patent, as well as royalties calculated with respect to net sales of these products.
Net Operating Loss Carryforwards
As of December 31, 2016, we had $111.4 million of U.S. federal NOL carryforwards, state NOL carryforwards of $110.6 million and U.S. federal and state research and development tax credit carryforwards of $1.9 millionATM Offering and $1.1 million respectively, availablein proceeds from the exercise of common stock warrants.
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Net cash provided by financing activities was $38.1 million for the year ended December 31, 2020 and consisted of $38.0 million net proceeds from the sale of common stock under the ATM Offering and $0.1 million in proceeds from the exercise of common stock warrants.
Net cash provided by financing activities was $35.4 million for the year ended December 31, 2019 and consisted primarily of $27.8 million in net proceeds from our June 2019 Financing, $5.5 million from the exercise of outstanding warrants to reduce future taxable income. Due topurchase our historycommon stock and $1.9 million in net proceeds from our ATM Offering.
Critical Accounting Policies and Use of losses and lack of other positive evidence, we have determined that it is more likely than not that our deferred tax assets will not be realized, and therefore, the deferred tax assets were fully reduced by a valuation allowance. These U.S. federal and state NOL carryforwards and U.S. federal and state tax credit carryforwards expire at various dates beginning in 2025 through 2036, if not utilized. Utilization of the NOLs and general business tax credits carryforwards may be subject to a substantial limitation under Sections 382 and 383 of the Internal Revenue Code of 1986 as amended, which we refer to as the Code, due to changes in ownershipEstimates
The preparation of our company that have occurred previously or that could occurconsolidated financial statements in the future. These ownership changes may limit the amount of NOLsaccordance with GAAP and general business tax credits carryforwards that can be utilized annually to reduce future taxable income and tax, respectively. In general, an ownership change, as defined by Section 382 of the Code, results from transactions increasing the ownership of “5-percent Shareholders” (as defined in the Code) in the stock of a corporation by more than 50 percentage points over a three-year period. We have determined that it is more likely than not that our net operating and tax credit amounts disclosed above are subject to a material limitation under Section 382. We may also experience ownership changes in the future as a result of subsequent shifts in our stock ownership. As a result, if we generate taxable income, our ability to use our pre-change NOL and tax credits carryforwards to reduce U.S. federal and state taxable income may be subject to limitations, which could result in increased future tax liability to us.
Off-balance Sheet Arrangements
We did not have during the periods presented, and we do not currently have, any off-balance sheet arrangements, as defined in the rules and regulations of the SEC.SEC require the use of estimates and assumptions, based on complex judgments considered reasonable, and affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. Our critical accounting policies are those policies which involve a significant level of estimation uncertainty and have had or are reasonably likely to have a material impact on our financial condition or results of operations. Management has determined that our most critical accounting policies are those relating to the fair value of indefinite-lived intangible assets, goodwill; contingent consideration; revenue recognition; development and regulatory milestone payments and other costs; and research and development costs.
Fair Value of Indefinite-Lived Intangible Assets
Item 7A.Quantitative and Qualitative Disclosures About Market Risk.
WeOur intangible assets consist of indefinite-lived, acquired in-process research and development ("IPR&D") worldwide product rights to Vicineum as a result of the acquisition of Viventia in 2016. IPR&D assets acquired in a business combination are exposedconsidered indefinite-lived until the completion or abandonment of the associated research and development efforts. Amortization over the estimated useful life will commence at the time of Vicineum's commercial launch in the respective markets, if approved. If regulatory approval to market riskVicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG is not obtained, we will immediately expense the related capitalized cost.
Indefinite-lived intangible assets are quantitatively tested for impairment at least annually during the fourth quarter of the fiscal year, or more often if indicators of impairment are present. Impairment testing of indefinite-lived intangible assets requires management to estimate the future discounted cash flows of an asset using assumptions believed to be reasonable, but which are unpredictable and inherently uncertain. Actual future cash flows may differ from the estimates used in impairment testing. We recognize an impairment loss when and to the extent that the estimated fair value of an intangible asset is less than its carrying value. In addition, on a quarterly basis, we perform a qualitative review of our business operations to determine whether events or changes in interest rates. Ascircumstances have occurred which could indicate that the carrying value of our intangible assets was not recoverable. If an impairment indicator is identified, an interim impairment assessment is performed.
In August 2021, we received a CRL from the FDA regarding our BLA for Vicineum for the treatment of NMIBC, our lead product candidate. In the CRL, the FDA determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality. Given the inherent uncertainty in the development plans for Vicineum as a result of the CRL and our withdrawal of the MAA, an impairment analysis was conducted in the third quarter of 2021, which concluded that the carrying value of our intangible asset of Vicineum United States rights was fully impaired as of September 30, 2021. The $31.7 million of impairment charges are due to delays in the expected start of commercialization and lower probabilities of success, combined with higher operating expenses expected to be incurred prior to commercialization, resulting in lower expected future cash flows estimated in the US market. At this time, we have assessed that the carrying value of the Vicineum EU rights is not at significant risk of impairment in the future within the current range of commercialization timelines and POS assumptions. This is primarily due to the fact that we expect the Vicineum sales outside of the US to be two to three times the expected sales volume in the US, based on our reassessment of the total addressable global market for high-risk NMIBC during the quarter ended June 30, 2019, wherein we determined that both the global market size and the estimated potential Vicineum commercial sales within the global market were likely higher than the Company's previous estimate. In addition, the EU asset is burdened with significantly less expense than the US asset, as our strategic operating plan is to sublicense Vicineum to business development partners in all regions outside the US, including the EU, with it earning a potential combination of upfront, milestone, and royalty payments, and the business development partner bearing the majority of regulatory and commercialization costs.
In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the requirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of our a BLA for Vicineum for the treatment of non-muscle invasive CIS of the
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bladder in patients previously treated with adequate or less than adequate BCG. We performed the annual impairment test, which incorporated the impact of the CRL and the subsequent Type A Meetings in the fourth quarter of 2021 and concluded that the carrying value of our intangible asset of Vicineum EU rights was not impaired as of December 31, 2021.
Goodwill
Goodwill on our consolidated balance sheets is the result of our acquisition of Viventia in September 2016 and represents the difference between the purchase price and the fair value of the identifiable tangible and intangible net assets acquired under the acquisition method of accounting. Goodwill is not amortized; rather than recording periodic amortization, goodwill is quantitatively tested for impairment at least annually during the fourth quarter of the fiscal year, or more often if indicators of impairment are present. Impairment testing of goodwill requires management to estimate the future discounted cash flows of a reporting unit using assumptions believed to be reasonable, but which are unpredictable and inherently uncertain. Actual future cash flows may differ from the estimates used in impairment testing. If the fair value of the equity of a reporting unit exceeds the reporting unit’s carrying value, including goodwill, then goodwill is considered not to be impaired. We recognize a goodwill impairment when and to the extent that the fair value of the equity of a reporting unit is less than the reporting unit's carrying value, including goodwill. We have only one reporting unit. In addition, on a quarterly basis, we had cash and cash equivalentsperform a qualitative review of $25.3 million, primarily money market mutual funds consisting of U.S. government-backed securities. Our primary exposureour business operations to market risk is interest rate sensitivity, which is affected bydetermine whether events or changes in circumstances have occurred which could have a material adverse effect on the estimated fair value of each reporting unit and thus indicate a potential impairment of the goodwill carrying value. If an impairment indicator is identified, an interim impairment assessment is performed. Given the inherent uncertainty in the development plans for Vicineum as a result of the CRL and our withdrawal of the MAA, an impairment analysis was conducted in the third quarter of 2021. While an impairment was recognized in one of our intangible assets, Vicineum US Rights, we concluded that the carrying value of our goodwill of $13.1 million was not impaired as of September 30, 2021. In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the requirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of our a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. We performed the annual goodwill impairment test, which incorporated the impact of the CRL and the subsequent Type A Meetings in the fourth quarter of 2021 and concluded that there was no goodwill impairment as of December 31, 2021. While our stock price has declined since December 31, 2021, this is consistent with the general levelbiotech sector overall, as world economic conditions continue to be impacted by the highly contagious Omicron variant. We believe that we have sufficient future cash flows from additional geographic regions outside the US to support the value of U.S. interest rates, particularly because our investments areits goodwill. We project future cash flows based on various timeline assumptions and applies a probability to each outcome based on management’s best estimate. In addition, probabilities of success in short-term securities. Due to the short-term duration of our investment portfolioachieving certain clinical and the low risk profile of our investments, an immediate 100 basis point change in interest rates would notregulatory success can also have a material effect on the estimated fair market value of our portfolio.
As our functional currency is the U.S. dollar, we face foreign exchange rate riskequity of its reporting unit as a result of entering into transactions denominated in Canadian dollars. As a result, our primary foreign currency exposure is to fluctuations in the Canadian dollar relative to the U.S. dollar. A hypothetical 10% change in the average foreign currency exchange rates during any of the preceding periods presented would not have a material effect on our net income (loss). Foreign exchange ratesimpairment assessment date. We will continue to evaluate timelines for commercialization and probability of success of development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
Contingent Consideration
Contingent consideration on our consolidated balance sheets is the result of our acquisition of Viventia in September 2016 and represents the discounted present value of future commercial launch milestones and net sales royalties due to the former shareholders of Viventia pursuant to the Share Purchase Agreement. For additional information on how contingent consideration has changed over the relevant period, see "Part IV - Item 15. Financial Statements - Notes to Consolidated Financial Statements - Note 1. Description of Business" of this Annual Report on Form 10-K. Contingent consideration is measured at its estimated fair value on a recurring basis at each reporting period, with fluctuations in value resulting in a non-cash charge to earnings (or loss) during the period. The estimated fair value measurement is based on significant unobservable inputs (Level 3 within the fair value hierarchy), including internally developed financial forecasts, probabilities of success and timing of certain milestone events and achievements, which are unpredictable and inherently uncertain. Actual future cash flows may differ from the assumptions used to estimate the fair value of contingent consideration. The valuation of contingent consideration requires the use of significant assumptions and judgments, which management believes are consistent with those that would be made by a factormarket participant. Management reviews its assumptions and judgments on an ongoing basis as additional market and other data is obtained, and any future changes in the assumptions and judgments utilized by management may cause the estimated fair value of contingent consideration to fluctuate materially, resulting in earnings volatility. In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the requirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that
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we plan to conduct for potential resubmission of our a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. We reassessed the underlying assumptions used to develop the revenue projections upon which the fair value of its contingent consideration is based. The most significant and impactful assumptions in our revenue projection models are timing of product launch and probabilities of clinical and regulatory success (POS); we expect delays in the start of commercialization and estimate lower POS as a direct result of the CRL. We plan to conduct an additional clinical trial, which will lead to delays in the start of commercialization globally and any significant changes or delays could have a significant impact on the fair value of contingent consideration. We have assessed a range of commercialization timeline assumptions and applied a probability to each outcome based on management’s best estimate. In addition, we now assume a lower POS in achieving certain clinical and regulatory milestones in the range of approximately 45% to 55% globally. Any changes in these assumptions and estimates, or other information obtained, may have a significant impact on the remeasurement of the contingent consideration liability in the future. The fair value of the Company’s contingent consideration is determined based on the present value of projected future cash flows associated with sales-based milestones and earnouts on net sales and is heavily dependent on discount rates to estimate the fair value at each reporting period. Earnouts are determined using an earnout rate of 2% on all commercial net sales of Vicineum through December 2033. The discount rate applied to the 2% earnout is derived from the Company’s estimated weighted-average cost of capital (“WACC”), which has fluctuated from 8.8% as of December 31, 2020, to 7.8% as of March 31, 2021, 6.8% as of June 30, 2021, 8.6% as of September 30, 2021, and 9.3% as of December 31, 2021. Milestone payments constitute debt-like obligations, and therefore a high-yield debt index rate is applied to the milestones in order to determine the estimated fair value. This index rate changed from 8.4% as of December 31, 2020, to 7.4% as of March 31, 2021, 6.6% as of June 30, 2021, 7.5% as of September 30, 2021, and 8.0% as of December 31, 2021.
Development and Regulatory Milestones and Other Payments
At the inception of an arrangement that includes development milestone payments, we evaluate whether the development milestones are considered probable of being reached and estimate the amount to be included in the transaction price using the most likely amount method. If it is probable that a significant revenue reversal would not occur, the associated development milestone value is included in the transaction price. Development milestone payments that are not within our control or the licensee's control, such as regulatory approvals, are not considered probable of being achieved until those approvals are received. For payments pursuant to sales milestones and royalty payments, we will note recognize revenue until the subsequent sale of a licensed product occurs. For arrangements with one than one performance obligations, the milestones are generally allocated entirely to the license performance obligation, as (1) the terms of milestone and royalty payments relate specifically to the license and (2) allocating milestones and royalties to the license performance obligation is consistent with the overall allocation objective, because management’s estimate of milestones and royalties approximates the standalone selling price of the license.
Research and Development Costs
Research and development activities are expensed in the period incurred. Research and development expenses consist of both internal and external costs associated with all basic research activities, clinical development activities and technical efforts required to develop a product candidate. Internal research and development consist primarily of personnel costs, including salaries, benefits and share-based compensation, facilities leases, research-related overhead, pre-approval regulatory and clinical trial costs, manufacturing and other contracted services, license fees and other external costs.
In certain circumstances, we are required to make advance payments to vendors for goods or services that will be received in the future periodsfor use in research and development activities. In such circumstances, the advance payments are recorded as we continueprepaid assets and expensed when the activity has been performed or when the goods have been received.
Recently Issued Accounting Standards
Recently issued accounting standards are discussed in "Part IV - Item 15. Exhibits and Financial Statements - Notes to expandConsolidated Financial Statements - Note 4. Recent Accounting Pronouncements" in our consolidated financial statements, which begin on page F-1 of this Annual Report on Form 10-K.
Item 7A.    Quantitative and grow our business.Qualitative Disclosures About Market Risk.
Not applicable.
Item 8.Financial Statements and Supplementary Data.
Item 8.    Financial Statements and Supplementary Data.
Our consolidated financial statements, together with the report of our independent registered public accounting firm, appear in the Index to Financial Statements beginning on pagespage F-1 through F-34 of this Annual Report on Form 10-K.

Item 9.    Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.
Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.
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There has been no change of accountants nor any disagreements with accountants on any matter of accounting principles or practices or financial disclosure required to be reported under this Item.
Item 9A.Controls and Procedures.
Evaluation of Item 9A.    Controls and Procedures.
Disclosure Controls and Procedures
We maintain disclosure controls and procedures, as defined in Exchange Act Rules 13a-15(e) and 15d-15(e), that are designed to ensure information required to be disclosed by us in reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms and that such information is accumulated and communicated to our management, including our principal executive officer and principle financial officer, to allow timely decisions regarding required disclosure. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are achieved. Further, the design of a control system must be balanced against resource constraints, and therefore, the benefits of controls must be considered relative to their costs. Given the inherent limitations in all systems of controls, no evaluation of controls can provide absolute assurance all control issues and instances of fraud, if any, within a company have been detected. These inherent limitations include the realities that judgments in decision making can be faulty and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of controls. The design of any system of controls is also based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions or the degree of compliance with the policies and procedures may deteriorate. Accordingly, given the inherent limitations in a cost-effective system of controls, financial statement misstatements due to error or fraud may occur and may not be detected. Our disclosure controls and procedures are designed to provide reasonable, not absolute, assurance of achieving their objectives. We conduct periodic evaluations of our system of controls to enhance, where necessary, our control policies and procedures.
Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as the end of December 31, 2016. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e)) under the Securities Exchange Act of 1934, as amended, or the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosedperiod covered by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time period specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.this Annual Report on Form 10-K. Based on theupon this evaluation, of our disclosure controls and procedures as of December 31, 2016, our Chief Executive Officer and Chief Financial Officer concluded that as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.level as of December 31, 2021.
Management’s AnnualManagement Report on Internal Control Over Financial Reporting
Our managementManagement is responsible for establishing and maintaining adequate internal control over financial reporting ("ICFR"), as defined in Exchange Act Rules 13a-15(f) and 15d-15(f) under, to provide reasonable assurance regarding the Exchange Act. Ourreliability of our financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. ICFR includes our policies and procedures, such as our Code of Conduct, which (i) require our employees, officers and directors to adhere to certain ethical standards; (ii) require the maintenance of records, in reasonable detail, to help to ensure that our transactions, assets and liabilities are accurately and fairly recorded; (iii) provide reasonable assurance that transactions are authorized by our management and directors and are recorded as necessary to allow for the accurate preparation of financial statements in accordance with GAAP; and (iv) provide reasonable assurance regarding the safeguarding of our assets and the prevention or timely detection of the unauthorized acquisition, use or disposition of our assets, which could have a material effect on the financial statements. ICFR includes the controls themselves, management's monitoring of those controls, actions taken to correct any deficiencies identified and oversight of our internal control environment by the audit committee of our board of directors. Any system of internal control has inherent limitations and therefore may not prevent or detect misstatements. Projections of any evaluation of the effectiveness of ICFR to future periods are subject to the risk that controls may become inadequate over time because of changes in conditions or that the degree of compliance with the policies or procedures may deteriorate.
Management assessed the effectiveness of our ICFR as of the end of our fiscal year 2021 and has reviewed the results of this assessment with the audit committee of our board of directors. Management based its assessment on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this assessment, our management concluded that our ICFR was effective as of December 31, 2021 to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP.
The effectiveness of our ICFR as of December 31, 2021 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report which is included immediately below.

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Report of Independent Registered Public Accounting Firm
To the Shareholders and the Board of Directors of Sesen Bio, Inc.
Opinion on Internal Control over Financial Reporting
We have audited Sesen Bio Inc.’s internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Sesen Bio, Inc. (the “Company”) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2021, based on the COSO criteria.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2021 and 2020, the related consolidated statements of operations and comprehensive loss, stockholders’ (deficit) equity and cash flows for each of the three years in the period ended December 31, 2021, and the related notes and our report dated February 28, 2022 expressed an unqualified opinion thereon.
Basis for Opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.
Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and Limitations of Internal Control Over Financial Reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to ourthe maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and our boarddirectors of directorsthe company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the preparation and fair presentation of publishedcompany’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. ProjectionsAlso, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2016. In making this assessment, our management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control—Integrated Framework (2013). Our management has excluded from its assessment of, and its conclusion on the effectiveness of internal control over financial reporting the internal controls of Viventia Bio, Inc. and its subsidiaries which were acquired September 20, 2016 and is included in our 2016 consolidated financial statements included in this Annual Report on Form 10-K. Viventia Bio, Inc. constituted $0.9 million of our total assets as of December 31, 2016 and $0 of our revenues for the year then ended.
As of December 31, 2016 there was a material weakness in our controls over the financial reporting process related to business combinations. As a result of a lack of expertise in our finance and accounting group related to the accounting for business combinations, we lacked sufficient review of assumptions used and conclusions reached from the perspective of a typical market participant used in the acquisition valuation model. As a result, our management concluded that our internal control over financial reporting was not effective as of December 31, 2016./s/ Ernst & Young LLP
We are committed to remediating the control deficiency that constituted the above material weakness by implementing changes to our internal control over financial reporting. Our management is responsible for implementing changes and improvements in the internal control over financial reporting and for remediating the control deficiency that gave rise to the above material weakness. To remediate the material weaknesses described above, we are currently evaluating the controls and procedures we will design and put in place to address the material weakness and plan to implement appropriate measures as part of this effort. These actions may include adding personnel, which may include one or more employees to our finance and accounting group and/or the engagement of independent consultants to aid our review of business combinations.
Any actions we have taken or may take to remediate the above material weaknesses is subject to continued management review supported by testing, as well as oversight by the audit committee of our board of directors. We cannot assure, in any way, even if we add one or more employees to our finance and accounting group and/or engage an independent consultant, that material weaknesses or significant deficiencies will not occur in the future and that we will be able to remediate such weaknesses or

Boston, Massachusetts
deficiencies in a timely manner, which could impair our ability to accurately and timely report our financial position, results of operations or cash flows.February 28, 2022
This annual report does not include an attestation report of our registered independent public accounting firm regarding internal control over financial reporting. Our management’s report was not subject to attestation by our independent registered public accounting firm pursuant to rules of the SEC that permit emerging growth companies, which we are, to provide only management’s report in this annual report.




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Changes in Internal Control over Financial Reporting
Except as described above, there was no changeThere have not been changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the three monthsquarter ended December 31, 20162021 that hashave materially affected or isare reasonably likely to materially affect our internal control over financial reporting.

Item 9B.Other Information.
87



Item 9B.    Other Information.
None.

Item 9C.    Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.
Not applicable.
PART III
Item 10.Item 10.    Directors, Executive Officers and Corporate Governance.
Board of Directors
Members of Our Board of Directors
The following table sets forth the name and age as of March 24, 2017 of each of our directors.
NameAgePosition
Stephen A. Hurly49President and Chief Executive Officer and Director
Wendy Dixon Ph.D.(1)(2)61Chair of the Board of Directors
Abbie C. Celniker, Ph.D.(3)58Director
Paul G. Chaney(2)59Director
Leslie L. Dan, B.Sc., Phm., M.B.A., C.M87Director
Jay S. Duker, M.D.58Director
Barry J. Gertz, M.D., Ph.D.65Director
Jane V. Henderson(1)(3)51Director
Daniel S. Lynch(1)(2)(3)58Director
(1)Member of the Audit Committee.
(2)Member of the Compensation Committee.
(3)Member of the Nominating and Corporate Governance Committee.
Stephen A. Hurly has served as our President and Chief Executive Officer since September 2016. Mr. Hurly brings nearly two decades of leadership experience in the life sciences industry. Prior to his role as our President and Chief Executive Officer, he served as the President and Chief Executive Officer of Viventia Bio Inc., or Viventia, a specialty pharmaceutical company, from March 2014 through our acquisition of Viventia in September 2016. Previously, Mr. Hurly was the Chief Executive Officer of Burrill & Co.'s Merchant Banking Division, a finance business for life science companies, from 2011 to 2014. Prior to that, Mr. Hurly was the head of the Life Sciences Investment Banking Practice at Boenning & Scattergood, a securities asset management and investment banking firm, from 2008 to 2011. Mr. Hurly has more than 15 years of experience in the investment banking business. Mr. Hurly currently serves on the board of directors of PHusis Therapeutics Inc., a private targeted small molecule therapeutics company, since May 2011. He graduated from Swarthmore College with a B.A. degree in Engineering and earned an M.B.A. from the University of Chicago. We believe that Mr. Hurly is qualified to serve on our board because of his extensive knowledge of our business based on his service as our President and Chief Executive Officer and previously as the President and Chief Executive Officer of Viventia.
Wendy L. Dixon, Ph.D. has served as the Chair of our board since December 2016 and as a member of our board since October 2014. Dr. Dixon has been the President of Great Meadow Consulting, L.L.C., a life science consulting firm, since July 2009. Additionally, Dr. Dixon has been an advisor to the Mellon Group since August 2014 and was a Senior Advisor to The Monitor Group, now Deloitte Consulting LLP, a consulting firm, from November 2010 to January 2012. Dr. Dixon has also been a member of the Industry Advisory Board of Longitude Capital, a venture capital firm, since March 2015. From 2001 to 2009, Dr. Dixon was the Chief Marketing Officer and President, Global Marketing for Bristol-Myers Squibb, where she served on the Executive Committee. From 1996 to 2001, she was the Senior Vice President, Marketing at Merck and Co., and prior to that, she held executive management positions at West Pharmaceuticals, Inc., Osteotech, Inc. (subsequently acquired by Medtronic Inc.) and Centocor Biotech, Inc. (now Janssen Biotech, Inc.) and various positions at SmithKline and French (now GlaxoSmithKline) in marketing, regulatory affairs, project management and as a biochemist. Dr. Dixon has served on the board of directors of Alkermes plc (NASDAQ: ALKS) since January 2011, Incyte Corporation (NASDAQ: INCY) since May 2010, bluebird bio (NASDAQ: BLUE) since May 2013, and Voyager Therapeutics, Inc. (NASDAQ: VYGR) since January 2017, and was formerly on the boards of Ardea Biosciences, when Ardea was acquired by AstraZeneca plc, Furiex Pharmaceuticals, when Furiex was acquired by Actavis plc, Dentsply International and Orexigen Therapeutics, Inc. (NASDAQ: OREX). Dr. Dixon received a B.S. and a M.S. in Natural Science and a Ph.D. in Biochemistry from the University of Cambridge (UK). We believe that Dr. Dixon is qualified to serve on our board because of her extensive executive leadership experience in and knowledge of the life sciences industry, as well as her extensive corporate governance experience from serving on numerous boards of directors in the life sciences industry.

Abbie C. Celniker, Ph.D. has served as a member of our board since September 2011 and previously as our President and Chief Executive Officer from September 2011 to September 2016. Since October 2016, Dr. Celniker has served as a partner of Third Rock Ventures, a venture capital firm, and as the interim chief executive officer at Goldfinch Biopharma, Inc., a private biotechnology company. Previously, Dr. Celniker served as the Executive Vice President, Translational Medicine of Alexion Pharmaceuticals, Inc., a biopharmaceutical company, from January 2011 to August 2011. Prior to joining Alexion Pharmaceuticals, Dr. Celniker served as the President and Chief Executive Officer and as a member of the board of directors of Taligen Therapeutics, Inc., a biotechnology company, from July 2008 to January 2011, when Taligen Therapeutics was acquired by Alexion Pharmaceuticals. Previously, Dr. Celniker served as the Global Head of Biologics of Novartis AG, the Senior Vice President of Research and Development Strategy and Operations of Millennium Pharmaceuticals, Inc. and the Vice President Protein Technologies of the Wyeth Research facilities in Cambridge, Massachusetts. Dr. Celniker formerly served on the board of directors of Dyax Corp. when it was acquired by Shire plc. Dr. Celniker received a B.A. in Biology from the University of California, San Diego, and a Ph.D. in Molecular Biology from the University of Arizona. We believe that Dr. Celniker is qualified to serve on our board because of her extensive experience in the development of biologics, her extensive executive leadership experience in the life sciences industry and her extensive knowledge of our company based on her prior experience as our President and Chief Executive Officer.
Paul G. Chaney has served as a member of our board since February 2014. Mr. Chaney is a co-founder of PanOptica, Inc., a private biopharmaceutical company focused on developing innovative ophthalmic therapeutics, and has served as its President and Chief Executive Officer since 2009. Prior to co-founding PanOptica, Mr. Chaney was executive vice president of OSI Pharmaceuticals, Inc. and president of (OSI) Eyetech, Inc., OSI Pharmaceutical’s wholly-owned eyecare subsidiary. Mr. Chaney joined Eyetech Pharmaceuticals as Chief Operating Officer in 2003. Prior to joining Eyetech, Mr. Chaney held a variety of senior management positions at Pharmacia Corporation, including Vice President of the Global Ophthalmology Business and Vice President of Global Pharmaceutical Ophthalmology. Mr. Chaney also serves as the chairman of the board of directors of Eyegate Pharmaceuticals, Inc. (NASDAQ: EYEG) since August 2008. He began his career as a sales representative for The Upjohn Company in 1980. Mr. Chaney earned a dual degree in Biological Sciences and English from the University of Delaware. We believe that Mr. Chaney is qualified to serve on our board because of his extensive executive leadership experience in the life sciences industry and at pharmaceutical company business units for over 20 years.
Leslie L. Dan, B.Sc. Phm., M.B.A., C.M. has served as a member of our board since September 2016 and is the founder of Viventia Bio, Inc. He was appointed the chair of Viventia’s board of directors in January 2013 and served as Viventia’s President and Secretary from 2012 to 2015. Mr. Dan also founded Novopharm (now known as Teva Canada Limited) in 1964, now a wholly-owned subsidiary of Teva Pharmaceuticals Industries Limited, and has served on Teva Canada’s board of directors as Chairman since 2000. Mr. Dan also served on the board of directors of Draxis Health Inc. (now known as Draxis Specialty Pharmaceuticals Inc.), a provider of sterile products, non-sterile products and radiopharmaceuticals, from 1993 to 2003, and on the board of directors of Teva Israel from 2001 to 2007. Mr. Dan graduated from the University of Toronto with a B.Sc. Phm. and an M.B.A. He has also received honorary doctorates from the University of British Columbia, Dalhousie University, York University and the University of Toronto. We believe that Mr. Dan is qualified to serve on our board because of his extensive executive leadership experience in and knowledge of the life sciences industry, as well as his extensive knowledge of our business as a founder of Viventia.
Jay S. Duker, M.D., has served as a member of our board since January 2015. Dr. Duker has served in varying capacities at the New England Eye Center (NEEC) since January 1992, most recently as Director since 2001. He has also served as Professor and Chairman of the Department of Ophthalmology at Tufts Medical Center and the Tufts University School of Medicine since 2003. He has published more than 185 journal articles, with his major research interests including retinal imaging, in particular optical coherence tomography (OCT), retinal vascular diseases, and drug delivery to the posterior segment. His book, Yanoff and Duker’s Ophthalmology, is one of the bestselling ophthalmic texts over the past decade. Dr. Duker is the co-founder of three companies, including Hemera Biosciences, a biotech start-up whose focus is a gene therapy based treatment for age-related macular degeneration. Dr. Duker has served on the board of directors of pSivida Corp. (NASDAQ: PSDV) since September 2016. Dr. Duker received an A.B. from Harvard University and a M.D. from the Jefferson Medical College at Thomas Jefferson University. We believe that Dr. Duker is qualified to serve on our board because of his extensive clinical and academic experience, his medical knowledge and as a co-founder of other life sciences companies.
Barry J. Gertz, M.D., Ph.D. has served as a member of our board since January 2015. Since October 2014, Dr. Gertz has served as a venture partner at Clarus Ventures, a venture capital firm. Prior to his time with Clarus Ventures, Dr. Gertz served in varying roles at Merck & Co., Inc., a pharmaceutical company, from 1986 until July 2014, including as Senior Vice President and Head of Global Clinical Development from 2002 to 2014. Dr. Gertz has co-authored over 100 scientific publications and has been a contributor to the evaluation and approval of more than 26 new drugs or vaccines. Dr. Gertz received a B.A. in chemistry from the University of Pennsylvania. He subsequently received M.D. and Ph.D. degrees in the Medical Scientist Training Program at the University of Pennsylvania, School of Medicine with a Ph.D. in the Department of Pharmacology. We

believe that Dr. Gertz is qualified to serve on our board because of his extensive executive leadership experience in a pharmaceutical company, his experience in clinical development, his knowledge of the life sciences industry and his insight into financial and investment matters from his experience in private equity investing in life sciences companies.
Jane V. Henderson has served as a member of our board since October 2013. Since January 2017, Ms. Henderson has served as the Chief Financial Officer of Voyager Therapeutics, Inc., a biopharmaceutical company. Prior to joining Voyager Therapeutics, Ms. Henderson served as the Senior Vice President, Chief Financial and Business Officer of Kolltan Pharmaceuticals, Inc., a biopharmaceutical company, from February 2013 to November 2016, when Kolltan Pharmaceuticals was acquired by Celldex Therapeutics, Inc. Prior to joining Kolltan Pharmaceuticals, Ms. Henderson served as the Vice President, Business Development of ISTA Pharmaceuticals, Inc., an eye care company, from June 2010 to June 2012, when ISTA Pharmaceuticals was acquired by Bausch + Lomb Incorporated. Prior to joining ISTA Pharmaceuticals, Ms. Henderson served as the Executive Vice President, Chief Financial Officer and Head of Business Development of Axerion Pharmaceuticals, Inc., a pharmaceutical company, from September 2009 to June 2010, provided independent consulting services from February 2009 to September 2009 and served as the Executive Vice President, Chief Financial Officer and Chief Business Officer of Panacos Pharmaceuticals, Inc., a pharmaceutical company, from January 2008 to February 2009. Prior to that, Ms. Henderson served in a variety of senior investment banking roles at HSBC Holdings plc, Canadian Imperial Bank of Commerce, Lehman Brothers and Salomon Brothers. Ms. Henderson received a B.S. in Psychology from Duke University. We believe that Ms. Henderson is qualified to serve on our board because of her extensive executive leadership experience in and knowledge of the life sciences industry and her extensive finance background as a chief financial officer for over five years and as an investment banker for over 20 years.
Daniel S. Lynch has served as a member of our board since December 2013 and as the Chair of our board from December 2013 to December 2016. Mr. Lynch has served as a venture partner at Third Rock Ventures, a venture capital firm, since May 2013 and as an entrepreneur-in-residence from May 2011 to May 2013. Since 2005, Mr. Lynch has served on the boards of directors of several life sciences companies, including on the board of directors of bluebird bio, Inc. (NASDAQ: BLUE) since 2011 and as chairman of the board of directors for Blueprint Medicines Corp. (NASDAQ: BPMC) since 2012. Previously, Mr. Lynch served on the board of directors of DNIB Unwind, Inc. (formerly BIND Therapeutics, Inc.) from 2012 until its acquisition by Pfizer Inc. Prior to that, Mr. Lynch served as the Chief Financial Officer and then the Chief Executive Officer of ImClone Systems Inc. Mr. Lynch received a B.A. in Mathematics from Wesleyan University and a M.B.A. from the Darden Graduate School of Business Administration at the University of Virginia. We believe that Mr. Lynch is qualified to serve on our board because of his senior leadership experience, his experience in private equity investing in life sciences companies and his extensive corporate governance experience through service on the boards of directors of other life sciences companies.
Executive Officers
Executive Officers
The following table sets forth the name and age as of March 24, 2017 of each of our directors.
NameAgePosition
Stephen A. Hurly49
President and Chief Executive Officer and Director
John J. McCabe, C.P.A.49
Chief Financial Officer
Arthur DeCillis, M.D.60
Chief Medical Officer
In addition to the biographical information for Mr. Hurly, which is set forth above, under “Board of Directors—Members of Our Board of Directors,” set forth below is certain biographical information about Mr. McCabe and Dr. DeCillis:
John J. McCabe, C.P.A. has served as our Chief Financial Officer since January 2016 and as our Treasurer since September 2012 and previously served as our Senior Vice President of Finance from August 2015 to January 2016, our Vice President of Finance and Business Operations from June 2013 through August 2015, and our Senior Director of Finance from April 2012 through June 2013. Prior to joining us, Mr. McCabe provided independent financial and accounting consulting services from June 2011 to April 2012. Prior to that, Mr. McCabe served as Vice President of Finance at Clinical Data, Inc., a drug developer that was acquired by Forest Laboratories, from December 2010 to June 2011 and as the Senior Director of Financial Reporting of Clinical Data from August 2007 to December 2010. Prior to that, Mr. McCabe served in several financial roles at Interleukin Genetics, Inc., a genetics-focused personalized health company, and SatCon Technology Corporation, a developer of innovative power conversion solutions. He began his career working for the accounting firm of Coopers & Lybrand LLP, now known as PricewaterhouseCoopers LLP. Mr. McCabe received a B.S. in Business Administration from the University of Vermont and is also a Certified Public Accountant.

Arthur DeCillis, M.D. has served as our Chief Medical Officer since September 2016. Previously, Dr. DeCillis served as the Chief Medical Officer of Viventia from September 2015 until September 2016. Prior to joining Viventia, Dr. DeCillis served as the Vice President of Medical Affairs at Exelixis, Inc., a biotechnology company which discovered, develops and commercializes small molecules for the treatment of cancer, from 2011 to 2015. Earlier at Exelixis, Dr. DeCillis served as the company’s Vice President of Clinical Research from 2007 to 2011. Prior to that, Dr. Decillis served as a Senior Director and Executive Director at Novartis Pharmaceutical Corp. from 2005 to 2007. Previously, he held positions of increasing responsibility in Oncology Global Clinical Research at Bristol-Myers Squibb Company, culminating as group director. He graduated from Lehigh University with a Bachelor’s degree in Mathematics, received his Doctor of Medicine degree from the University of Rochester School of Medicine and Dentistry and received a M.S. degree in Intelligent Systems from the University of Pittsburgh. He completed his internship and residency in Internal Medicine at the Medical College of Virginia and a Fellowship in Medical Informatics at the University of Pittsburgh. He is Board Certified in Internal Medicine.
No Family Relationships
There are no family relationships between any of our officers and directors.
Board Committees
Our board has established an audit committee, a compensation committee, and a nominating and corporate governance committee, each of which operates under a charter that has been approved by our board. Copies of the committee charters are posted on the Investor Relations section of our website, which is located at ir.elevenbio.com.
Audit Committee
The members of our audit committee are Ms. Henderson, Dr. Dixon and Mr. Lynch. Ms. Henderson chairs our audit committee. Our audit committee’s responsibilities include:
appointing, approving the compensation of, and assessing the independence of, our registered public accounting firm;
overseeing the work of our independent registered public accounting firm, including through the receipt and consideration of reports and other communications from such firm;
reviewing and discussing with management and our independent registered public accounting firm our annual and quarterly financial statements and related disclosures;
monitoring our internal control over financial reporting, disclosure controls and procedures and code of business conduct and ethics;
overseeing our internal audit function;
overseeing our risk assessment and risk management policies;
establishing policies and procedures for the receipt and retention of accounting-related complaints and concerns;
meeting independently with our internal auditing staff, our independent registered public accounting firm and management;
reviewing and approving or ratifying any related person transactions; and
preparing the audit committee report required by SEC rules.
All audit and non-audit services, other than de minimis non-audit services, to be provided to us by our independent registered public accounting firm must be approved in advance by our audit committee.
Our board has determined that each of Ms. Henderson and Mr. Lynch is an “audit committee financial expert” as defined in applicable SEC rules and that each qualifies as independent as defined under the applicable NASDAQ rules.
The audit committee met seven times during 2016.
Compensation Committee
The members of our compensation committee are Dr. Dixon, Messrs. Lynch and Chaney. Dr. Dixon chairs our compensation committee. Our compensation committee’s responsibilities include:
reviewing and approving, or making recommendations to our board with respect to, the compensation of our chief executive officer and our other executive officers;
overseeing an evaluation of our senior executives;
overseeing and administering our cash and equity incentive plans;

retaining the services, following the determination of independence under applicable NASDAQ and Exchange Act rules, of our compensation consultant, as well as overseeing and considering the recommendations of our compensation consultant;
reviewing and making recommendations to our board with respect to director compensation;
reviewing and discussing annually with management our compensation disclosure required by SEC rules; and
preparing the compensation committee report required by SEC rules.
The processes and procedures followed by our compensation committee in considering and determining executive and director compensation are described below under “—Board Processes—Executive and Director Compensation Processes.” In addition to the board’s independence determination, our board has determined that each member of our compensation committee is a “non-employee director” for purposes of Rule 16b-3 under the Exchange Act, and an “outside director” for purposes of Section 162(m) of the Internal Revenue Code.
The compensation committee met seven times during 2016.
Nominating and Corporate Governance Committee
The members of our nominating and corporate governance committee are Mr. Lynch, Dr. Celniker and Ms. Henderson. Mr. Lynch chairs our nominating and corporate governance committee. Our nominating and corporate governance committee’s responsibilities include:
identifying individuals qualified to become members of our board;
recommending to our board the persons to be nominated for election as directors and to each of our board’s committees;
reviewing and making recommendations to our board with respect to our board leadership structure;
reviewing and making recommendations to our board with respect to management succession planning;
developing and recommending to our board corporate governance principles; and
overseeing a periodic evaluation of our board.
The nominating and corporate governance committee met one time during 2016.
At the 2017 Annual Meeting, stockholders will be asked to consider the election of Dr. Celniker, Ms. Henderson and Mr. Lynch, each of whom has been nominated for election as a director for the first time since the completion of our initial public offering in March 2014.
During 2011, Dr. Celniker was appointed by our board as a new director.

During 2013, Ms. Henderson and Mr. Lynch were each appointed by our board as a new director. Ms. Henderson and Mr. Lynch were each originally proposed to our nominating and corporate governance committee by Dr. Celniker, our former chief executive officer, and were each subsequently appointed as a director by our board.
Director Nomination Process
The process followed by our nominating and corporate governance committee to identify and evaluate director candidates may include requests to board members and others for recommendations, evaluation of the performance on our board and its committees of any existing directors being considered for nomination, consideration of biographical information and background material relating to potential candidates and, particularly in the case of potential candidates who are not then serving on our board, interviews of selected candidates by members of our nominating and corporate governance committee and our board.
In considering whether to recommend any particular candidate for inclusion in our board’s slate of recommended director nominees, our nominating and corporate governance committee applies the criteria set forth in our corporate governance guidelines described below under “—Corporate Governance Guidelines”. Consistent with these criteria, our nominating and corporate governance committee expects every nominee to have the following attributes or characteristics, among others: integrity, honesty, adherence to high ethical standards, business acumen, good judgment and a commitment to understand our business and industry.
Each of the director nominees is currently a member of our board. The nominee biographies under “—Board of Directors—Members of Our Board of Directors” indicate the experience, qualifications, attributes and skills of each of our current directors that led our nominating and corporate governance committee and our board to conclude he or she should continue to serve as a

member of our board. Our nominating and corporate governance committee and our board believe that each of the nominees has the individual attributes and characteristics required of each of our directors, and that the nominees as a group possess the skill sets and specific experience desired of our board as a whole.
Our nominating and corporate governance committee considers the value of diversity when selecting nominees, and believes that our board, taken as a whole, should embody a diverse set of skills, experiences and abilities. The committee does not make any particular weighting of diversity or any other characteristic in evaluating nominees and directors.
Stockholders may recommend individuals for consideration as potential director candidates by submitting their names, together with appropriate biographical information and background materials, and information with respect to the stockholder or group of stockholders making the recommendation, including the number of shares of common stock owned by such stockholder or group of stockholders, to our Corporate Secretary at Eleven Biotherapeutics, Inc. 245 First Street, Suite 1800 Cambridge, MA 02142, Attention: Corporate Secretary. The specific requirements for the information that is required to be provided for such recommendations to be considered are specified in our by-laws and must be received by us no later than the requisite dates set forth under our by-laws and Rule 14a-8 promulgated under the Exchange Act. Assuming that appropriate biographical and background material has been provided on a timely basis, the nominating and corporate governance committee will evaluate stockholder-recommended candidates by following substantially the same process, and applying substantially the same criteria, as it follows for candidates submitted by others.
Stockholders also have the right under our by-laws to directly nominate director candidates, without any action or recommendation on the part of the nominating and corporate governance committee or our board, by following the procedures set forth in our by-laws.
Code of Business Conduct and Ethics
We haveOur Board has adopted a written Code of Business Conduct and Ethics that appliesapplicable to our directors, officers and employees, including our principal executive officer, principal financial officer, principal accounting officer or controller or persons performing similar functions. The Code of Business Conduct and Ethics covers fundamental ethical and compliance-related principles and practices such as accurate accounting records and financial reporting, avoiding conflicts of interest, the protection and use of our property and information and compliance with legal and regulatory requirements. A current copy of the code is posted on the Corporate Governance section of our website, which is located at http://www.elevenbio.com. If we makewww.sesenbio.com. We intend to satisfy the disclosure requirement under Item 5.05 of Form 8-K regarding any substantive amendmentsamendment to, or grant any waiverswaiver from, a provision of this Code and by posting such information on the Codewebsite address and location specified above.
The additional information required by this item will be set forth in our 2022 Proxy Statement to be filed with the SEC within 120 days of Business ConductDecember 31, 2021 and Ethics for any officer or director, we will disclose the nature of such amendment or waiver on our website or in a Currentis incorporated by reference into this Annual Report on Form 8-K to the extent10-K.
Item 11.     Executive Compensation.
The information required by applicable law, the rules ofthis item will be set forth in our 2022 Proxy Statement to be filed with the SEC or the rules of the NASDAQ Global Market.
Section 16(a) Beneficial Ownership Reporting Compliance
Based solely on our review of copies of reports filed by individuals and entities required to make filings pursuant to Section 16(a) of the Exchange Act or written representations from such individuals or entities, we believe that during 2016 all filings required to be made by such individuals or entities were timely made in accordance with the Exchange Act.
Item 11.Executive Compensation.

This section describes the material elements of compensation awarded to, earned by or paid to each of our named executive officers in 2016. Our named executive officers for 2016 are Stephen A. Hurly, our President and Chief Executive Officer, John J. McCabe, C.P.A., our Chief Financial Officer, Arthur DeCillis, M.D., our Chief Medical Officer, Abbie C. Celniker, Ph.D., our former Chief Executive Officer, and Karen Tubridy, Pharm.D, our former Chief Development Officer. This section also provides qualitative information regarding the manner and context in which compensation is awarded to and earned by our executive officers and is intended to place in perspective the data presented in the tables and narrative that follow.
Summary Compensation Table
The following table sets forth information regarding compensation awarded to, earned by or paid to each of our named executive officers for the years ended December 31, 2016 and 2015.

Name and Principal Position Year 
Salary
($)
 
Bonus
($)(6)
 
Stock-based
awards
($)(7)
 
Option
awards
($)(7)
 
All other
compensation
($)
 
Total
($)
Stephen A. Hurly(1) 2016 119,093
 
 
 755,511
 
 874,604
President and Chief Executive Officer 2015 
 
 
 
 
 
Abbie C. Celniker, Ph.D.(2) 2016 325,137
 
 
 51,385
 675,000
(8)1,051,522
Former President and Chief Executive Officer 2015 430,000
 150,500
 236,722
 976,898
 4,000
(9)1,798,120
John J. McCabe, C.P.A.(3) 2016 305,000
 75,000
 
 227,846
 
 607,846
Chief Financial Officer 2015 
 
 
 
 
 
Arthur DeCillis, M.D.(4) 2016 116,855
 
 
 215,860
 
 332,715
Chief Medical Officer 2015 
 
 
 
 
 
Karen Tubridy, Pharm.D.(5) 2016 233,889
 
 
 24,652
 323,710
(10)582,251
Former Chief Development Office 2015 312,000
 65,525
 103,187
 437,920
 4,000
(9)922,632
(1)Mr. Hurly has served as our President and Chief Executive Officer since September 20, 2016.
(2)Dr. Celniker resigned as our President and Chief Executive Officer on September 20, 2016. All compensation reported with respect to her status as a named executive officer reflects amounts paid prior to September 20, 2016. See “Director Compensation” for all fees earned by Dr. Celniker as a non-employee director after September 20, 2016.
(3)Mr. McCabe has served as our Chief Financial Officer effective January 1, 2016.
(4)Dr. DeCillis has served as our Chief Medical Officer since September 20, 2016.
(5)Ms. Tubridy resigned as or Chief Development Officer on September 20, 2016.
(6)The amounts reported in the "Bonus" column reflect discretionary cash bonuses payable to our named executive officers for their performance in a given year.
(7)The amounts reported in the “Stock-based awards” and "Options awards" columns reflect the aggregate grant date fair value of stock-based compensation awarded during the year computed in accordance with the provisions of Financial Accounting Standards Board Accounting Standard Codification, or ASC, Topic 718. See Note 12 to our financial statements appearing at the end of our Annual Report on Form 10-K for the year ended December 31, 2016 regarding assumptions underlying the valuation of equity awards.
(8)All other compensation includes $450,000 paid to Dr. Celniker, pursuant to a Separation and Release Agreement, which is an amount equal to her base salary for 12 months, and $225,000, which is an amount equal to her target bonus payment for 2016.
(9)All other compensation includes a discretionary employer 401(k) matching contribution.
(10)All other compensation includes $323,710 paid to Ms Tubridy, pursuant to a Separation and Release Agreement, which is an amount equal to her base salary for 12 months.
Narrative to Summary Compensation Table
In 2016, we paid annual base salaries of $425,000 to Mr. Hurly, $305,000 to Mr. McCabe and $417,011 to Dr. DeCillis. Base salaries are used to recognize the experience, skills, knowledge and responsibilities required of all our employees, including our named executive officers. None of our named executive officers is currently party to an employment agreement or other agreement or arrangement that provides for automatic or scheduled increases in base salary.
From time to time, our board has approved discretionary annual cash bonuses to our named executive officers with respect to their prior year performance. Our board did not approve discretionary cash bonus to any of the named executives for 2016 performance.
Although we do not have a formal policy with respect to the grant of equity incentive awards to our executive officers, or any formal equity ownership guidelines applicable to them, we believe that equity grants provide our executives with a strong link to our long-term performance, create an ownership culture and help to align the interests of our executives and our stockholders. In addition, we believe that equity grants with a time-based vesting feature promote executive retention by incenting our executive officers to remain in our employment during the vesting period. Accordingly, our board periodically reviews the equity incentive compensation of our named executive officers and from time to time may grant equity incentive awards to them in the form of stock options or restricted stock units, or RSUs.

In February 2016, based upon our overall performance, we granted Dr. Celniker options to purchase 113,250 shares of our common stock, Mr. McCabe, options to purchase 28,313 shares of our common stock, and Ms. Tubridy options to purchase 60,400 shares of our common stock, in each case at an exercise price of $0.28 per share. These options vest over four years in equal quarterly installments, with the first installment vesting on March 31, 2016. Also in February 2016, for retention purposes, we granted Dr. Celniker options to purchase 180,000 shares of our common stock, Mr. McCabe options to purchase 40,000 shares of our common stock, and Ms. Tubridy options to purchase 40,000 shares of our common stock, in each case at an exercise price of $0.28 per share. 50% of these options vest over two years in equal monthly installments, with the first installment vesting on March 25, 2016. The remaining 50% will vest upon the achievement of certain milestones.
In September 2016, we granted Mr. Hurly options to purchase 350,000 shares of our common stock, Mr. McCabe options to purchase 100,000 shares of our common stock and Dr. DeCillis options to purchase 100,000 shares of our common stock, in each case at an exercise price of $3.37 per shares. These options vest over four years, with 25% of the shares underlying the options vesting on September 20, 2017 and 6.25% of the shares underlying the options vesting quarterly thereafter. The options granted to each of Messrs. Hurly and DeCillis were granted outside our 2014 Stock Incentive Plan as inducement awards in connection with their acceptance of employment in accordance with NASDAQ Stock Market Rule 5635(c)(4).
Separation Agreements
In connection with their terminations of employment, on September 20, 2016, each of Dr. Celniker and Ms. Tubridy entered into a Separation and Release of Claims Agreement with us, collectively referred to herein as the “Separation Agreements.” Each Separation Agreement sets forth the terms of each officer’s resignation, effective as of September 20, 2016, including a general release of claims against us arising out of her employment with or resignation from the company.
Under the Separation Agreement with Dr. Celniker, we (i) paid Dr. Celniker $450,000, which is an amount equal to her base salary for 12 months, (ii) paid Dr. Celniker $225,000, which is an amount equal to her target bonus payment for 2016, (iii) accelerated in full the vesting of all of Dr. Celniker’s outstanding equity awards (other than certain equity awards forfeited by Dr. Celniker to the extent necessary to eliminate any “excess parachute payments” within the meaning of Sections 280G and 4999 of the Code, (iv) provided that all stock options granted to Dr. Celniker under our Amended and Restated 2009 Stock Incentive Plan shall continue to be exercisable based on her continued service as a non-employee member of the board and, (v) continued to provide Dr. Celniker and certain of her dependents with group health and dental insurance for a period of one month.
Under the Separation Agreement with Ms. Tubridy, we (i) paid Ms. Tubridy $323,710, which is an amount equal to her base salary for 12 months, (ii) accelerated in full the vesting of all of Ms. Tubridy’s outstanding equity awards and, (iii) continued to provide Ms. Tubridy and certain of her dependents with group health and dental insurance for a period of 12 months. Under the Separation Agreement, all of Ms. Tubridy’s outstanding equity awards expired on December 19, 2016.
Outstanding Equity Awards at December 31, 2016
The following table sets forth information regarding all outstanding stock options and RSUs held by each of our named executive officers as120 days of December 31, 2016.2021 and is incorporated by reference into this Annual Report on Form 10-K.

Item 12.     Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
 Option Awards Stock Awards 
Name
Number of
securities
underlying
unexercised
options
(#)
exercisable
 
Number of
securities
underlying
unexercised
options
(#)
unexercisable
 
Option
exercise
price
($)
 
Option
expiration
date
 
Number of shares or units
of stock 
that have
not vested
(#)
 
Market value of
shares or units of stock that have
not vested
($)
 
Stephen A. Hurly
 350,000
(1)3.37
 9/19/2026   

 
Abbie C. Celniker(2)90,551
 
 0.83
 3/14/2023     
 47,243
 
 7.37
 10/30/2023     
 145,000
 
 10.40
 2/25/2025     
 110,405
 
 0.28
 2/24/2026     
John J. McCabe21,496
 
 0.76
 5/16/2022   

 
 3,690
 247
(3)0.83
 2/13/2013     
 7,677
 2,559
(4)7.37
 10/30/2023     
 10,719
 13,781
(5)10.40
 2/25/2025     
 19,396
 5,104
(6)3.10
 5/20/2025     
 6,250
 13,750
(7)4.09
 8/11/2025     
 5,309
 23,004
(8)0.28
 2/24/2026     
 20,000
 
 0.28
 2/24/2026     
 8,333
 11,667
(9)0.28
 2/24/2026     
 
 100,000
(1)3.37
 9/19/2026     
         3,333
(10)6,366
(11)
Arthur DeCillis
 100,000
(1)3.37
 9/19/2026     
(1)Vests over four years, with 25% of the shares underlying the option to vest on September 20, 2017 and 6.25% of the shares underlying the option vesting quarterly thereafter.
(2)All of Dr. Celniker’s equity awards fully vested on September 20, 2016 pursuant to her Separation Agreement.
(3)Vests over four years in equal quarterly installments, with the first installment vested January 1, 2013.
(4)Vests over four years in equal quarterly installments, with the first installment vesting on January 1, 2014.
(5)Vests over four years in equal quarterly installments, with the first installment vesting on March 31, 2015.
(6)Vests over two years in equal quarterly installments, with the first installment vesting on June 21, 2015.
(7)Vests over four years in equal quarterly installments, with the first installment vesting on November 1, 2015.
(8)Vests over four years in equal quarterly installments, with the first installment vesting on April 1, 2016.
(9)Vests over two years in equal quarterly installments, with the first installment vesting on March 25, 2016.
(10)Vests over eighteen-months in equal installments every six months, with the first installment vesting on February 12, 2016.
(11)The market value of these shares is based on the last reported sales price on December 31, 2016.
Employment Agreements with Current Executive Officers
In August 2015, we entered into an employment agreement with Mr. McCabeThe information required by this item will be set forth in connection with his promotionour 2022 Proxy Statement to Senior Vice President of Finance. In addition, in September 2016, we entered into employment agreements with Mr. Hurly and Dr. DeCillis. Each of these agreements provides that employment will continue until either we or the executive officer provides notice of termination in accordancebe filed with the termsSEC within 120 days of December 31, 2021 and is incorporated by reference into this Annual Report on Form 10-K.
Item 13.     Certain Relationships and Related Transactions, and Director Independence.
The information required by this item will be set forth in our 2022 Proxy Statement to be filed with the agreement. In addition, we have enteredSEC within 120 days of December 31, 2021 and is incorporated by reference into non-competition, non-solicitation, confidentialitythis Annual Report on Form 10-K.
Item 14.     Principal Accountant Fees and assignment agreementsServices.
The information required by this item will be set forth in our 2022 Proxy Statement to be filed with eachthe SEC within 120 days of our executive officers which prohibit them from competing with us, soliciting our employeesDecember 31, 2021 and customersis incorporated by reference into this Annual Report on Form 10-K.
88


PART IV
Item 15.    Exhibits and disclosing confidential information duringFinancial Statement Schedules.
(a)(1) Consolidated Financial Statements
The consolidated financial statements listed in the termIndex to Financial Statements beginning on page F-1 are filed as part of their employment and for a specified time thereafter.this Annual Report on Form 10-K.
Pursuant(a)(2) Financial Statement Schedules
The financial statement schedule listed in the Index to their respective employment agreements, eachFinancial Statements on page F-1 is filed as part of our executive officers is entitled to receive an annual base salarythis Annual Report on Form 10-K.
(a)(3) Exhibits
The exhibits filed as follows: Mr. Hurly, $425,000; Mr. McCabe, $265,000; and Dr. DeCillis, $417,000. In February 2016, our board approved a merit based salary increase retroactively effective to January 1, 2016 for Mr. McCabe, whose annual base salary was increased to $305,000.

In addition, pursuant to their respective employment agreements, eachpart of our executive officers is eligible to receive an annual cash bonus, which is basedthis Annual Report on Form 10-K are set forth on the achievement of individualExhibit Index immediately preceding such exhibits and corporate performance objectives, calculated as a percentage of the executive’s annual base salary, and which will be determinedare incorporated herein by our board, in its sole discretion, as follows: Mr. Hurly 50%, Mr. McCabe 25% and Dr. DeCillis 30%. In connection with Mr. McCabe’s promotion to Chief Financial Officer, the Board approved an increase to the target bonus for Mr. McCabe from 25% of his annual base salary in 2015 to 30% of his annual base salary in 2016.reference.
In connection with the Acquisition, we also entered into a retention letter agreement with Mr. McCabe, who continued to serve as our Chief Financial Officer following the closing of the Acquisition. The retention letter agreement, as subsequently amended on March 5, 2017, provides that Mr. McCabe: (i) would receive a $75,000 bonus at the closing of the Acquisition, (ii) is eligible for an additional $75,000 retention bonus payable in twelve months or earlier if his employment is terminated without cause or for good reason (each as defined in his employment agreement); (iii) may voluntarily resign without good reason (as defined in his employment agreement) within the twelve-month period following the closing of the Acquisition and receive the post-change in control severance benefits under his employment agreement, provided however, in such case, Mr. McCabe would forego the above described retention bonus, and (iv) would receive options to purchase 100,000 shares of our common stock at an exercise price of $3.37 per share.
Potential Payments to Named Executive Officers Upon Termination or Change in Control Transaction
Upon execution and effectiveness of a release of claims, each of our named executive officers will be entitled to severance payments if his employment is terminated under specified circumstances.
Mr. Hurly. If we terminate Mr. Hurly’s employment without cause, as defined in his employment agreement, or if Mr. Hurly terminates his employment with us for good reason, as defined in his employment agreement, absent a change in control transaction, as defined in his employment agreement, we are obligated to (i) pay Mr. Hurly’s base salary for a period of 12 months, paid in accordance with our then-current payroll practices, (ii) pay Mr. Hurly an amount equal to his target bonus payment for the year in which the termination of employment occurs, prorated for the portion of the year in which he was employed, and, (iii) to the extent allowed by applicable law and the applicable plan documents, continue to provide Mr. Hurly and certain of his dependents with group health and dental insurance for a period of 12 months.
If we terminate Mr. Hurly’s employment without cause or if Mr. Hurly terminates his employment with us for good reason, in each case within 18 months following a change in control transaction, as defined in his employment agreement, we are obligated to (i) pay Mr. Hurly an amount equal to his base salary for 12 months, paid in accordance with our then-current payroll practices, (ii) pay Mr. Hurly an amount equal to his target bonus payment for the year in which the termination of employment occurs, (iii) accelerate in full the vesting of all of Mr. Hurly’s outstanding equity awards and, (iv) to the extent allowed by applicable law and the applicable plan documents, continue to provide Mr. Hurly and certain of his dependents with group health and dental insurance for a period of 12 months.
In addition, we have agreed to indemnify Mr. Hurly in any action or proceeding arising out of his service to us, unless he initiates such action or proceeding. These indemnification obligations may require us, among other things, to indemnify Mr. Hurly for certain expenses, including attorneys’ fees that are incurred by him, and to advance to Mr. Hurly such expenses upon request.
Other named executive officers. If we terminate Mr. McCabe's or Dr. DeCillis's employment without cause, as defined in their respective employment agreements, or if Mr. McCabe or Dr. DeCillis terminates his employment with us for good reason, as defined in their respective employment agreements, absent a change in control transaction, as defined in their respective employment agreements, we are obligated to (i) pay Mr. McCabe's or Dr. DeCillis's base salary for a period of 12 months, paid in accordance with our then-current payroll practices and, (ii) to the extent allowed by applicable law and the applicable plan documents, continue to provide Mr. McCabe or Dr. DeCillis and certain of his dependents with group health and dental insurance for a period of 12 months.
If we terminate Mr. McCabe's or Dr. DeCillis's employment without cause or if Mr. McCabe or Dr. DeCillis terminates his employment with us for good reason, in each case within 12 months following a change in control transaction, as defined in their respective employment agreements, we are obligated to (i) pay Mr. McCabe or Dr. DeCillis an amount equal to his base salary for 12 months, paid in accordance with our then-current payroll practices, (ii) accelerate in full the vesting of all of Mr. McCabe's or Dr. DeCillis's outstanding equity awards and, (iii) to the extent allowed by applicable law and the applicable plan documents, continue to provide Mr. McCabe or Dr. DeCillis and certain of his dependents with group health and dental insurance for a period of 12 months.

Taxation. To the extent that any severance or other compensation payment to any of Messrs. Hurly and McCabe or Dr. DeCillis pursuant to his employment agreement or any other agreement constitutes an “excess parachute payment” within the meaning of Sections 280G and 4999 of the Code, then such executive officer will receive the full amount of such severance and other payments, or a reduced amount intended to avoid the application of Sections 280G and 4999, whichever provides the executive with the highest amount on an after-tax basis.
401(k) Plan
We maintain a defined contribution employee retirement plan for our employees. Our 401(k) plan is intended to qualify as a tax-qualified plan under Section 401 of the Code so that contributions to our 401(k) plan, and income earned on such contributions, are not taxable to participants until withdrawn or distributed from the 401(k) plan. Our 401(k) plan provides that each participant may contribute up to 75% of his or her pre-tax compensation, up to a statutory limit, which was $18,000 for 2016. Participants who are at least 50 years old can also make “catch-up” contributions, which in 2016 was up to an additional $6,000 above the statutory limit. Under our 401(k) plan, each employee is fully vested in his or her deferred salary contributions. Employee contributions are held and invested by the plan’s trustee, subject to participants’ ability to give investment directions by following certain procedures. We can make discretionary contributions or matching contributions to our 401(k) plan based on a percentage of contributions made by the employee. We may limit the amount of discretionary contributions up to a specified percentage or dollar amount. Viventia sponsored a 401(k) retirement plan for its U.S.-based employees. Participants may contribute a percentage of their annual compensation to this plan, subject to statutory limitations.
Executive and Director Compensation Processes
Our executive compensation program is administered by the compensation committee of our board, subject to the oversight and approval of our full board. Our compensation committee reviews our executive compensation practices on an annual basis and based on this review makes recommendations to our board for approval, which has full discretion to approve or modify the recommendations of the compensation committee.
In designing our executive compensation program, our compensation committee considers publicly available compensation data for national and regional companies in the biotechnology/pharmaceutical industry to help guide its executive compensation decisions at the time of hiring and for subsequent adjustments in compensation. Our compensation committee has also retained the services of Radford, an independent compensation consultant, to provide it with additional comparative data on executive compensation practices in our industry and to advise it on our executive compensation program generally. Although the compensation committee considers Radford’s advice and recommendations about our executive compensation program, the compensation committee ultimately makes its own decisions about these matters.
None of the compensation committee members and none of our executive officers or directors have any relationship with Radford or the individual consultants employed by Radford. Radford has not provided any other services to our board or management other than compensation consulting services to the compensation committee. The compensation committee has determined that no conflicts of interest exist between Radford and our company, our directors or our executive officers. The compensation committee is directly responsible for the appointment and oversight of any compensation consultants and other advisors it retains.
Our director compensation program is administered by the compensation committee of our board, subject to the oversight and approval of our full board. The compensation committee conducts periodic reviews of director compensation and makes recommendations to the board with respect thereto.
Limitation of Liability and Indemnification
Our certificate of incorporation limits the personal liability of directors for breach of fiduciary duty to the maximum extent permitted by the DGCL, and provides that no director will have personal liability to us or to our stockholders for monetary damages for breach of fiduciary duty as a director. However, these provisions do not eliminate or limit the liability of any of our directors:
for any breach of the director’s duty of loyalty to us or our stockholders;
for acts or omissions not in good faith or that involve intentional misconduct or a knowing violation of law;
for voting for or assenting to unlawful payments of dividends, stock repurchases or other distributions; or
for any transaction from which the director derived an improper personal benefit.

Any amendment to or repeal of these provisions will not eliminate or reduce the effect of these provisions in respect of any act, omission or claim that occurred or arose prior to such amendment or repeal. If the DGCL is amended to provide for further limitations on the personal liability of directors of corporations, then the personal liability of our directors will be further limited to the greatest extent permitted by the DGCL.
In addition, our certificate of incorporation provides that we must indemnify our directors and officers and we must advance expenses, including attorneys’ fees, to our directors and officers in connection with legal proceedings, subject to very limited exceptions.
We maintain a general liability insurance policy that covers specified liabilities of our directors and officers arising out of claims based on acts or omissions in their capacities as directors or officers. In addition, we have entered into indemnification agreements with all of our directors and executive officers. These indemnification agreements may require us, among other things, to indemnify each such director and executive officer for some expenses, including attorneys’ fees, judgments, fines and settlement amounts incurred by him in any action or proceeding arising out of his or her service as one of our directors or executive officers.
Some of our non-employee directors may, through their relationships with their employers, be insured or indemnified against specified liabilities incurred in their capacities as members of our board.
Insofar as indemnification for liabilities arising under the Securities Act of 1933, or the Securities Act, may be permitted to directors, executive officers or persons controlling us, in the opinion of the SEC, such indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.
Director Compensation
Our non-employee directors are compensated for their services on our board as follows:
Exhibit Index
Compensation
Annual Board Cash Retainer$35,000
Additional Retainer for Non-Executive Chair of the Board$47,500
Additional Retainers for Committee Chairs
     ● Audit$15,000
     ● Compensation$10,000
     ● Nominating and Corporate Governance$7,500
Additional Retainers for Committee Members
     ● Audit$7,500
     ● Compensation$6,000
     ● Nominating and Corporate Governance$3,750
Annual Equity Award8,072 shares of common stock
Initial Equity Award16,143 shares of common stock
The stock options granted to our non-employee directors will have an exercise price equal to the fair market value of our common stock on the date of grant and will expire ten years after the date of grant. The initial stock options granted to our non-employee directors will, subject to the director’s continued service on our board, vest monthly in equal amounts over a three-year period following the grant date. The annual stock options granted to our non-employee directors will, subject to the director’s continued service on our board, vest monthly in equal amounts over a one-year period following the grant date.
Each annual cash fee will be payable in arrears in four equal quarterly installments on the last day of each quarter, provided that the amount of each payment will be prorated for any portion of a quarter that a director is not serving on our board.
Each member of our board will also be entitled to reimbursement for reasonable travel and other expenses incurred in connection with attending meetings of the board and any committee on which he or she serves.
The table below shows all compensation to our non-employee directors during 2016.

Name Fees Earned or Paid in Cash ($) 
Option
Awards
($)(1)
 Total ($)
Wendy L. Dixon(2) 47,687
 9,246
 56,933
David A. Berry, M.D., Ph.D.(3) 25,625
 9,246
 34,871
Abbie C. Celniker, Ph.D.(4) 9,701
 
 9,701
Paul G. Chaney(2) 41,000
 
 41,000
Leslie L. Dan(5) 9,701
 34,568
 44,269
Jay Duker, M.D.(2) 35,000
 9,246
 44,246
Barry Gertz, M.D.(2) 35,000
 9,246
 44,246
Jane V. Henderson(2) 53,750
 9,246
 62,996
Daniel S. Lynch(2) 104,435
 9,246
 113,681
Cary G. Pfeffer, M.D.(6) 28,010
 9,246
 37,256
(1)The amounts reported in the “Option Awards” column reflect the aggregate grant date fair value of stock-based compensation awarded during the year computed in accordance with the provisions of Financial Accounting Standards Board ASC Topic 718. See Note 12 to our financial statements appearing at the end of our Annual Report on Form 10-K for the year ended December 31, 2016 regarding assumptions underlying the valuation of equity awards.
(2)Immediately following the annual meeting of stockholders held on June 8, 2016, Dr. Dixon, Dr. Berry, Mr. Chaney, Dr. Duker, Dr. Gertz, Ms. Henderson, Mr. Lynch and Dr. Pfeffer each received an option to purchase 8,072 shares of common stock at an exercise price of $1.83 per share. These stock options vest over twelve months, with 1/12th of the shares underlying the option vesting at the end of each one-month period following June 8, 2016.
(3)Dr. Berry resigned from our board on August 15, 2016.
(4)Dr. Celniker became a non-employee director on September 20, 2016. All fees reported as director compensation reflect amounts paid after September 20, 2016.
(5)In connection with the election of Mr. Dan as a member of our board, in September 2016, our board granted Mr. Dan an option to purchase 16,143 shares of our common stock at an exercise price of $3.37 per share. This stock option vests over three years, with 1/36th of the shares underlying the option vesting at the end of each one-month period following September 20, 2016.
(6)Dr. Pfeffer resigned from our board on September 20, 2016.
During 2016, we did not provide any additional compensation to Mr. Hurly, our President and Chief Executive Officer, for his service as a director. Mr. Hurly’s compensation as a named executive officer is set forth above under “Executive Compensation—Summary Compensation Table.”
The table below shows all stock options held by each of our directors at the end of 2016.
Name
Exhibit
No.
Description
2.1
Stock Options Outstanding
Wendy L. Dixon3.132,287
David A. Berry, M.D., Ph.D.(1)3.2
Abbie C. Celniker, Ph.D.3.3506,449
Paul G. Chaney3.432,287
Leslie L. Dan4.1*16,143
Jay Duker, M.D.4.224,215
Barry Gertz, M.D.4.324,215
Jane V. Henderson4.445,277
Daniel S. Lynch4.5106,695
Cary G. Pfeffer, M.D.(2)4.6
4.7
10.1+
89


(1)10.2+Dr. Berry resigned from
10.3+
10.4+
10.5+
10.6+
10.7+
10.8*
10.9+
10.10†
10.11†
10.12†
10.13†
10.14+
10.15
10.16
10.17+
10.18†
10.19+
10.20+
90


10.21+
10.22+
10.23
10.24
10.25†
10.26
10.27+
10.28+
10.29
10.30*+
10.31*+
21.1*
23.1*
31.1*
31.2*
32.1*
32.2*
101.INSInline XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document)    
101.SCHInline XBRL Taxonomy Extension Schema Document
101.CALInline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEFInline XBRL Taxonomy Extension Definition Linkbase Document
101.LABInline XBRL Taxonomy Extension Label Linkbase Document
101.PREInline XBRL Taxonomy Extension Presentation Linkbase Document
101Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).
(2)Dr. Pfeffer resigned from our board on September 20, 2016.
Compensation Committee Interlocks and Insider Participation

None of our executive officers serves as a member of the board of directors or compensation committee, or other committee serving an equivalent function, of any other entity that has one or more of its executive officers serving as a member of our board or our compensation committee. None of the members of our compensation committee is, or has ever been, an officer or employee of our company.
*Filed herewith.
+This exhibit is a compensatory plan or arrangement in which our executive officers or directors participate.
Portions of this exhibit have been omitted in compliance with Item 12.Security Ownership601 of Certain Beneficial Owners and Management and Related Stockholder Matters.Regulation S-K.
The following table sets forth information with respect
91


Item 16.    Form 10-K Summary.
Not applicable.
92


SIGNATURES
Pursuant to the beneficial ownershiprequirements of our common stock asSection 13 or 15(d) of March 24, 2017 by:
each of our directors;
each of our named executive officers;
all of our directors and executive officers as a group; and
each person, or group of affiliated persons, who is known by us to beneficially own more than 5% of our common stock based on currently available Schedules 13D and 13G filed with the Securities and Exchange Commission.
The column entitled “Percentage of Shares Beneficially Owned” is based on a total of 24,700,746 shares of our common stock outstanding as of March 24, 2017.
Beneficial ownership is determined in accordance with the rules and regulations of the SEC and includes voting or investment power with respect to our common stock. Shares of our common stock subject to options and warrants that are currently exercisable or exercisable within 60 days after March 24, 2017 are considered outstanding and beneficially owned by the person holding the options or warrants for the purpose of calculating the percentage ownership of that person but not for the purpose of calculating the percentage ownership of any other person. Except as otherwise noted, the persons and entities in this table have sole voting and investing power with respect to all of the shares of our common stock beneficially owned by them, subject to community property laws, where applicable. Except as otherwise set forth below, the address of each beneficial owner is c/o Eleven Biotherapeutics, Inc., 245 First Street, Suite 1800, Cambridge, Massachusetts 02142.
Name and Address of Beneficial Owner 
Number of
shares
beneficially
owned
 
Percentage of shares
beneficially owned
5% Stockholders:    
Clairmark Investments Ltd.(1) 3,582,328
 14.5%
Entities affiliated with Flagship Ventures Management, Inc.(2) 1,400,944
 5.7%
JAFCO Super V3 Investment Limited Partnership(3) 1,449,337
 5.9%
Third Rock Ventures, L.P.(4) 4,841,591
 19.6%
Directors and Named Executive Officers:    
Wendy L. Dixon, Ph.D.(5) 29,372
 *
Abbie C. Celniker, Ph.D.(6) 916,364
 3.6%
Paul G. Chaney(7) 31,614
 *
Leslie L. Dan(1)(8) 3,585,915
 14.5%
Jay S. Duker, M.D.(9) 19,955
 *
Barry J. Gertz, M.D., Ph.D.(9) 19,955
 *
Jane V. Henderson(10) 41,979
 *
Daniel S. Lynch(11) 176,901
 *
Stephen A. Hurly(12) 398,031
 1.6%
John J. McCabe, C.P.A. (13) 127,865
 *
Arthur DeCillis, M.D. 
 *
Karen Tubridy, Pharm.D.(14) 32,753
 *
All current executive officers and directors as a group (11 persons)(15) 5,347,951
 20.9%
*Less than one percent.

(1)Based on information reported by Clairmark Investments Ltd. on Schedule 13D filed (1) with the SEC on September 26, 2016. Clairmark is the beneficial owner of the 3,582,328 shares of common stock issued to Clairmark as consideration for the Acquisition of Viventia. Of these shares, 358,232 are being held in escrow for indemnification purposes related to the Acquisition. The address of each of the reporting persons is Clairmark Investments Ltd., 305 Milner Avenue, Suite 914, Toronto, Ontario M1B 3V4.
(2)Based on information reported by Flagship Ventures Fund 2007, L.P. on Schedule 13D/A filed with the SEC on November 30, 2016. Flagship Ventures Fund 2007, L.P., or Flagship 2007 Fund, Flagship Ventures Fund IV, L.P., or Flagship IV Fund, and Flagship Ventures Fund Iv-Rx, L.P., or Flagship IV-Rx Fund, directly hold 1,090,887 shares, 247,550 shares and 62,507 shares of common stock, respectively. Flagship Ventures 2007 General Partner LLC, or Flagship 2007 GP, as the general partner of Flagship 2007 Fund, may be deemed to beneficially own the shares directly held by Flagship 2007 Fund. Flagship Ventures Fund IV General Partner LLC, or Flagship IV GP, as the general partner of Flagship IV Fund and Flagship IV-Rx Fund, may be deemed to beneficially own the shares directly held by Flagship IV Fund and Flagship IV-Rx Fund. Dr. Afeyan and Mr. Kania, as the managers of Flagship 2007 GP and Flagship IV GP, may be deemed to beneficially own the shares directly held by Flagship 2007 Fund, Flagship IV Fund and Flagship IV-Rx Fund. Dr. Afeyan and Mr. Kania hereby disclaim beneficial ownership of the shares of common stock held by Flagship 2007 Fund, Flagship IV Fund, and Flagship IV-Rx Fund, except to the extent of their pecuniary interest therein. The address of each of the reporting persons is Flagship Ventures, One Memorial Drive, 7th Floor, Cambridge, MA 02142.
(3)Based on information reported by JAFCO Super V3 Investment Limited Partnership, or JAFCO Super V3, and JAFCO Co., Ltd. on Schedule 13G/A filed with the SEC on February 9, 2016. JAFCO Super V3 directly holds 1,449,337 shares of common stock. JAFCO Co., Ltd., as the general partner of JAFCO Super V3, may be deemed to have sole power to vote and sole power to dispose of shares of the issuer directly owned by JAFCO Super V3. The address of each of the reporting persons is Otemachi First Square West Tower 11F, 1-5-1, Otemachi Chiyoda-Ku, Tokyo, Japan 100-0004.
(4)Based on information reported by Third Rock Ventures, L.P., or TRV L.P., on Schedule 13D filed with the SEC on February 21, 2014. TRV L.P. directly holds 4,841,591 shares of common stock. Each of Third Rock Ventures GP L.P., or TRV GP, as sole general partner of TRV L.P., and Third Rock Ventures GP, LLC, or TRV GP LLC, as sole general partner of TRV GP, may be deemed to share voting and dispositive power with respect to all shares held by TRV L.P. Each of Mark J. Levin, Kevin Starr, and Dr. Robert I. Tepper, as a manager of TRV LLC, may also be deemed to share voting and dispositive power with respect to all shares held by TRV L.P. Each of the reporting persons disclaims beneficial ownership of the TRV Shares other than those shares which such person owns of record. The address of each of the reporting persons is Third Rock Ventures, 29 Newbury Street, 3rd Floor, Boston, MA 02116.
(5)Consists of 29,372 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
(6)Consists of (i) 409,915 shares of common stock and (ii) 506,449 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
(7)Consists of 31,614 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
(8)Includes 3,587 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
(9)Consists of 19,955 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
(10)Consists of 41,979 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
(11)Consists of (i) 70,879 shares of restricted common stock and (ii) 106,022 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
(12)Consists of 398,031 shares of common stock issued to Mr. Hurly as consideration for the Acquisition (as defined below). Of these shares, 39,803 are being held in escrow for indemnification purposes related to the Acquisition.
(13)Consists of (i) 5,930 shares of common stock and (ii) 121,935 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
(14)Based upon information set forth in the Form 4 filed on Jun 29, 2016. Ms. Tubridy resigned as or Chief Development Officer on September 20, 2016.
(15)Consists of (i) 4,467,083 shares of common stock and (ii) 880,868 shares of common stock issuable upon the exercise of options exercisable within 60 days after March 24, 2017.
Securities Authorized for Issuance under Equity Incentive Plans
The following table sets forth information concerning the awards that may be issued under our 2014 Stock Incentive Plan or under separate inducement awards as of December 31, 2016.

Plan Category (a) Number of securities to be issued upon exercise of outstanding options, warrants and rights Weighted-average exercise price of outstanding options, warrants and rights (1) Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a)) 
Equity compensation plans approved       
     by security holders 1,377,801
(2)$4.90
 1,088,303
 
Equity compensation plans not approved       
     by security holders 650,000
(3)3.37
 
(4)
Total 2,027,801
 $4.41
 1,088,303
 
(1)Represents the weighted-average exercise price of outstanding stock options only. As restricted stock units have no exercise price, they are excluded from the weighted-average exercise price calculation.
(2)Consists of outstanding (i) options to purchase 1,374,468 shares of common stock and (ii) restricted stock units covering an aggregate of 3,333 shares of common stock. Shares in settlement of vested restricted stock units are deliverable within 30 days of the vesting date.
(3)Reflects option grants that were “inducement grants” as defined under NASDAQ Listing Rule 5635(c)(4). Each of the inducement grants expires on the day preceding the tenth anniversary of the grant date and vests over four years, with 25% of the original number of shares subject to the option vesting on the one year anniversary of the date of grant of the option and an additional 6.25% of the shares subject to the option vesting at the end of each successive three-month period following the one-year anniversary of the date of grant of the option, subject to the recipient’s continued service with us through the applicable vesting dates.
(4)Our board of directors has not established any specific number of shares that could be issued without stockholder approval. Inducement grants to new key employees are determined on a case-by-case basis. Other than possible inducement grants, we expect that all equity awards will be made under stockholder-approved plans.
Item 13.Certain Relationships and Related Transactions, and Director Independence.
Director Independence
Our board observes all applicable criteria for independence established by the NASDAQ Stock Market Rules and other governing laws and applicable regulations, including the requirement that a majority of our directors be independent as defined under the NASDAQ Stock Market Rules. Under Rule 5605(a)(2) of the NASDAQ Stock Market Rules, a director will only qualify as an “independent director” if, in the opinion of our board, that person does not have a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director. Our board has determined that all of our directors with the exceptions of Messrs. Hurly and Dan and Dr. Celniker are independent as defined under the NASDAQ Stock Market Rules.
In addition, the NASDAQ Stock Market Rules require that, subject to specified exceptions, (i) each member of our audit and compensation committees be independent, (ii) each member of our audit committee satisfy independence criteria set forth in Rule 10A-3 under the Securities Exchange Act of 1934, as amended, or the Exchange Act; and (iii) each member of our compensation committee satisfy the independence criteria set forth in Rule 10C-1 under the Exchange Act. In orderregistrant has duly caused this report to be considered independent for purposes of Rule 10A-3, a member of our audit committee may not, other than in his or her capacity as a membersigned on its behalf by the undersigned, thereunto duly authorized.
SESEN BIO, INC.
(Registrant)
Date:February 28, 2022By:/s/ Thomas R. Cannell, D.V.M.      
Name:Thomas R. Cannell, D.V.M.
Title:President and Chief Executive Officer
(Principal Executive Officer and Duly Authorized Officer)
Pursuant to the requirements of the audit committee, the board, or any other board committee: (1) accept, directly or indirectly, any consulting, advisory or other compensatory fee from us or any of our subsidiaries; or (2) be an affiliated person of us or any of our subsidiaries. In addition, Rule 10C-1 under theSecurities and Exchange Act requires that,of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. 
SignatureCapacityDate
/s/ Thomas R. Cannell, D.V.M.President, Chief Executive Officer and Director
(Principal Executive Officer)
February 28, 2022
Thomas R. Cannell, D.V.M.
/s/ Monica ForbesChief Financial Officer
(Principal Financial Officer)
February 28, 2022
Monica Forbes
/s/ Elly RyuCorporate Controller
(Principal Accounting Officer)
February 28, 2022
Elly Ryu
/s/ Jay S. Duker, M.D.Chair of the Board of DirectorsFebruary 28, 2022
Jay S. Duker, M.D.
/s/ Carrie L. BourdowDirectorFebruary 28, 2022
Carrie L. Bourdow
/s/ Jason A. KeyesDirectorFebruary 28, 2022
Jason A. Keyes
/s/ Peter K Honig, M.D.DirectorFebruary 28, 2022
Peter K Honig, M.D.
/s/ Michael A.S. Jewett, M.D.DirectorFebruary 28, 2022
Michael A.S. Jewett, M.D.
93


INDEX TO FINANCIAL STATEMENTS
Page
Report of Independent Registered Public Accounting Firm (PCAOB ID: 42)
F-2
Consolidated Balance Sheets
F-5
Consolidated Statements of Operations and Comprehensive Loss
F-6
Consolidated Statements of Changes in Stockholders’ Equity (Deficit)
F-7
Consolidated Statements of Cash Flows
F-8
Notes to Consolidated Financial Statements
F-8

F-1


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of Sesen Bio, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Sesen Bio, Inc. (the “Company”) as of December 31, 2021 and 2020, the related consolidated statements of operations and comprehensive loss, stockholders’ (deficit) equity, and cash flows for each of the three years in the period ended December 31, 2021, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021, in conformity with U.S. generally accepted accounting principles.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 28, 2022 expressed an unqualified opinion thereon.
Basis for Opinion
These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the independence of each member of our compensation committee, our board consider all factors specifically relevant to determining whether a director has a relationshipCompany in accordance with us which is material to that director’s ability to be independent from management in connection with his or her duties as a compensation committee member, including, but not limited to: (1) the source of his or her compensation as a director, including any consulting, advisory or other compensatory fee paid by us to him or her;U.S. federal securities laws and (2) whether he or she is affiliated with us or any of our subsidiaries or affiliates.

Our board has also determined that: (i) Ms. Henderson, Dr. Dixon and Mr. Lynch who comprise our audit committee; and (ii) Messrs. Lynch and Chaney and Dr. Dixon who comprise our compensation committee, each satisfy the independence standards for those committees established by the applicable rules and regulations underof the Securities and Exchange ActCommission and the NASDAQ Stock Market Rules. In addition,PCAOB.
We conducted our audits in accordance with the exceptionstandards of Dr. Celniker, each memberthe PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our nominating and corporate governance committee is independent as defined underaudits provide a reasonable basis for our opinion.
Critical Audit Matters
The critical audit matters communicated below are matters arising from the NASDAQ Stock Market Rules. In making such determination, our board consideredcurrent period audit of the relationshipsfinancial statements that each such non-employee director has with us and all other facts and circumstances our board deemed relevant in determining independence.
Related Person Transactions Policy
Our board has adopted written policies and procedures for the review of any transaction, arrangementwere communicated or relationship in which our company is a participant, the amount involved exceeds $120,000 and one of our executive officers, directors, director nominees or 5% stockholders, or their immediate family members, each of whom we refer to as a “related person,” has a direct or indirect material interest. As a smaller reporting company, we are also required to review and approve any transaction, arrangement or relationship in which our company is a participant, the amount involved exceeds the lesser of $120,000 and or one percent of the average of our total assets at year-end for the last two completed fiscal years, and a related person has a direct or indirect material interest. Because one percent of our average total assets for the past two fiscal years has exceeded $120,000, our board has continuedbe communicated to apply the $120,000 threshold under our policy.
If a related person proposes to enter into such a transaction, arrangement or relationship, which we refer to as a “related person transaction,” the related person must report the proposed related person transaction to our principal accounting officer. The policy calls for the proposed related person transaction to be reviewed and, if deemed appropriate, approved by our audit committee. Whenever practicable, the reporting, review and approval will occur prior to entry into the transaction. If advance review and approval is not practicable, the committee will review, and, in its discretion, may ratify the related person transaction. The policy also permits the chair of the audit committee and that: (1) relates to review and, if deemed appropriate, approve proposed related person transactions that arise between committee meetings, subject to ratification by the audit committee at its next meeting. Any related person transactionsaccounts or disclosures that are ongoingmaterial to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of critical audit matters does not alter in nature will be reviewed annually.any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing a separate opinion on the critical audit matters or on the accounts or disclosures to which they relate.

F-2


Fair Value of Contingent Consideration
Description of the Matter
As discussed in Notes 3 and 5 to the consolidated financial statements under the caption “Contingent Consideration,” the Company uses a discounted cash flow model to estimate the fair value of the contingent consideration liability each reporting period, which represents the present value of projected future cash flows associated with regulatory approval milestones and royalties on net sales due to the selling shareholders of Viventia Bio Inc. Fluctuations in the fair value of the liability result in a charge to earnings (or loss) during the period. As of December 31, 2021, the Company estimated the fair value of the contingent consideration liability as $52.0 million and recorded the change in fair value of $56.8 million as operating income for the year ended December 31, 2021.

Auditing the fair value of the contingent consideration liability required significant auditor judgment due to the high degree of subjectivity in evaluating certain assumptions used to estimate the fair value. In particular, the fair value measurement was sensitive to the significant assumptions underlying the projected commercial sales of Vicineum and probabilities of success and timing of certain milestone events and achievements.
How We Addressed the Matter in Our AuditWe obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the development of the significant assumptions over the Company’s process to estimate the fair value of the contingent consideration liability. This included testing controls over management’s review of the significant estimation assumptions and methods used to develop the fair value estimate, the accuracy of the calculations included within the fair value model, and the underlying data used in the model.
To test the estimated fair value of the contingent consideration liability, our audit procedures included, among others, assessing the terms of the arrangement, evaluating the methodology used and testing the key inputs and significant assumptions discussed above. We evaluated the significant assumptions in light of observable industry and economic trends and standards, external data sources, probability of success benchmarks, and regulatory factors. Our procedures included evaluating the data sources used by management in determining its significant assumptions and included an evaluation of available information that either corroborated or contradicted management’s conclusions. In addition, we involved our valuation professionals to assess the methodology used to determine the fair value of the contingent consideration liability, which included performing corroborative fair value calculations.
Impairment Evaluation of Goodwill and Indefinite-Lived Intangible Assets
Description of the MatterAs discussed in Notes 3 and 8 to the consolidated financial statements under the captions “Indefinite-Lived Intangible Assets” and “Goodwill,” the Company’s intangible assets consist of indefinite-lived, acquired in-process research and development (IPR&D) worldwide product rights to Vicineum as a result of the acquisition of Viventia in 2016. Goodwill on the Company's consolidated balance sheets is the result of the Company’s acquisition of Viventia in September 2016 and represents the difference between the purchase price and the fair value of the identifiable tangible and intangible net assets acquired under the acquisition method of accounting. Indefinite-lived intangible assets are quantitatively tested for impairment at least annually during the fourth quarter of the fiscal year, or more often if indicators of impairment are present. Goodwill is quantitatively tested for impairment at least annually during the fourth quarter of the fiscal year, or more often if indicators of impairment are present. Impairment testing of IPR&D requires management to estimate the future discounted cash flows of the underlying asset. Impairment testing of goodwill requires management to estimate the future discounted cash flows of the Company’s one reporting unit.
Auditing management’s impairment assessments required significant auditor judgment due to the high degree of subjectivity in evaluating certain assumptions used to estimate the fair value of the reporting unit for and the IPR&D. In particular, the fair value estimates of goodwill and of IPR&D were sensitive to the significant assumptions underlying the projected commercial sales of Vicineum.
F-3


How We Addressed the Matter in Our Audit
We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the development of the significant assumptions over the Company’s goodwill and indefinite-lived intangible asset impairment review processes. This included testing controls over management’s review of the quantitative impairment analyses of goodwill and IPR&D, including the significant estimation assumptions and methods used, the accuracy of the calculations included within the valuation models, and the underlying data used in those models.

To test the impairment evaluations over goodwill and IPR&D assets, our audit procedures included, among others, evaluating the methodology and valuation models used and testing the key inputs and significant assumptions discussed above. We evaluated the significant assumptions in light of observable industry and economic trends and standards, external data sources, probability of success benchmarks, and regulatory factors. Our procedures included evaluating the data sources used by management in determining its significant assumptions and included an evaluation of available information that either corroborated or contradicted management’s conclusions. In addition, we inspected the Company’s reconciliation of the fair value of the reporting unit to the market capitalization of the Company and assessed the results. We involved our valuation professionals to assess the methodology and valuation of the discounted cash flow models, including evaluating the reasonableness of certain significant assumptions.


/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2010.
Boston, Massachusetts
February 28, 2022

F-4


SESEN BIO, INC.
CONSOLIDATED BALANCE SHEETS
(In thousands, except share and per share data)
December 31,
20212020
Assets
Current assets:
Cash and cash equivalents$162,636 $52,389 
Accounts receivables21,011 — 
Other receivables3,482 — 
Prepaid expenses and other current assets18,476 7,478 
Restricted Cash— 3,000 
Total current assets205,605 62,867 
Non-current assets:
Restricted cash20 20 
Property and equipment, net43 123 
Intangible assets14,700 46,400 
Goodwill13,064 13,064 
Long term prepaid expenses7,192 — 
Other assets123 349 
Total non-current assets$35,142 $59,956 
                         Total Assets$240,747 $122,823 
Liabilities and Stockholders’ Equity (Deficit)
Current liabilities:
Accounts payable$2,853 $3,102 
Accrued expenses8,255 3,973 
Deferred revenue— 1,500 
Contingent consideration— 8,985 
Other current liabilities460 489 
Total current liabilities11,568 18,049 
Non-current liabilities:
Contingent consideration, net of current portion52,000 99,855 
Deferred tax liability3,969 12,528 
Deferred revenue, net of current portion1,500 1,500 
Other non-current liabilities— 118 
Total non-current liabilities57,469 114,001 
                         Total Liabilities69,037 132,050 
Stockholders’ Equity (Deficit):
Preferred stock, $0.001 par value per share; 5,000,000 shares authorized at December 31, 2021 and 2020; no shares issued and outstanding at December 31, 2021 and 2020— — 
Common stock, $0.001 par value per share; 400,000,000 and 200,000,000 shares authorized at December 31, 2021 and 2020; 199,463,645 and 140,449,647 shares issued and outstanding at December 31, 2021 and 2020, respectively199 140 
Additional paid-in capital487,768 306,554 
Accumulated deficit(316,257)(315,921)
Total Stockholders’ Equity (Deficit)171,710 (9,227)
Total Liabilities and Stockholders’ Equity$240,747 $122,823 
The accompanying notes are an integral part of these consolidated financial statements.
F-5


SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
(In thousands, except per share data)
Year ended December 31,
202120202019
Revenue:
License and related revenue$26,544 $11,236 $— 
Total Revenue26,544 11,236 — 
Operating expenses:
Research and development25,312 29,191 24,663 
General and administrative29,393 14,302 12,208 
Restructuring charge5,528 — — 
Intangibles impairment charge31,700 — — 
Change in fair value of contingent consideration(56,840)(11,180)71,620 
Total operating expenses35,093 32,313 108,491 
Loss from Operations$(8,549)$(21,077)$(108,491)
Other (expense) income, net(60)125 991 
Loss Before Taxes$(8,609)$(20,952)$(107,500)
Benefit (provision) from income taxes$8,273 $(1,445)$— 
Net Loss and Comprehensive Loss After Taxes$(336)$(22,397)$(107,500)
Deemed dividend on adjustment of exercise price of certain warrants$— $(147)$— 
Net loss attributable to common stockholders - basic and diluted$(336)$(22,544)$(107,500)
Net loss per common share - basic and diluted$— $(0.19)$(1.18)
Weighted-average common shares outstanding - basic and diluted$182,323 $118,221 $90,929 
The accompanying notes are an integral part of these consolidated financial statements.
F-6


SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (DEFICIT)
(In thousands, except share data)
Common StockAdditional
Paid-in
Capital
Accumulated
Deficit
Stockholders’
Equity (Deficit)
SharesAmount
Balance at December 31, 201877,456,180 $77 $230,154 $(186,024)$44,207 
Net loss— — — (107,500)(107,500)
Share-based compensation— — 1,237 — 1,237 
Exercises of stock options and vesting of RSAs89,812 — 98 — 98 
Sales of common stock under 2014 ESPP10,283 — — 
Issuance of common stock and common stock warrants, net of issuance costs of $2.2 million20,410,000 21 27,812 — 27,833 
Exercises of common stock warrants6,772,928 5,474 — 5,481 
Issuance of common stock under ATM Offering, net of issuance costs of $0.2 million2,062,206 1,934 — 1,936 
Balance at December 31, 2019106,801,409 107 266,717 (293,524)(26,700)
Net loss— — — (22,397)(22,397)
Share-based compensation— — 1,757 — 1,757 
Exercises of stock options12,000 — 13 — 13 
Sales of common stock under 2014 ESPP28,186 — 11 — 11 
Exercises of common stock warrants238,110 — 131 — 131 
Issuance of common stock under ATM Offering, net of issuance costs of $1.2 million33,369,942 33 37,925 37,958 
Balance at December 31, 2020140,449,647 140 306,554 (315,921)(9,227)
Net loss— — — $(336)(336)
Share-based compensation— — 5,143 — 5,143 
Exercises of stock options33,610 — 42 — 42 
Exercises of common stock warrants2,048,059 1,124 — 1,126 
Issuance of common stock under ATM Offering, net of issuance costs of $5.4 million56,932,329 57 174,905 — 174,962 
Balance at December 31, 2021199,463,645 $199 $487,768 $(316,257)$171,710 
The accompanying notes are an integral part of these consolidated financial statements.
F-7


SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)
 Year ended December 31,
 202120202019
Cash Flows from Operating Activities:
Net loss$(336)$(22,397)$(107,500)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation85 122 219 
Share-based compensation5,143 1,757 1,237 
Change in fair value of contingent consideration(56,840)(11,180)71,620 
       Intangibles impairment charge31,700 — — 
Changes in operating assets and liabilities:
Accounts receivable (net)(24,493)— — 
Prepaid expenses and other assets(17,964)(1,304)(5,188)
Accounts payable(249)1,200 535 
Accrued expenses and other liabilities(4,424)(2,035)1,556 
Deferred revenue(1,500)3,000 — 
                      Net cash used in operating activities(68,878)(30,837)(37,521)
Cash Flows from Investing Activities:
Purchases of equipment(4)(8)(136)
                      Net cash used in investing activities(4)(8)(136)
Cash Flows from Financing Activities:
Proceeds from issuance of common stock and common stock warrants, net of issuance costs— — 27,833 
Proceeds from exercises of common stock warrants1,126 131 5,481 
Proceeds from issuance of common stock under ATM Offering, net of
issuance costs
174,962 37,958 1,936 
Proceeds from exercises of stock options42 13 98 
Proceeds from sale of common stock pursuant to ESPP— 11 
Net cash provided by financing activities176,129 38,113 35,356 
Net increase (decrease) in cash, cash equivalents and restricted cash107,247 7,268 (2,301)
Cash, cash equivalents and restricted cash - beginning of period55,409 48,141 50,442 
Cash, cash equivalents and restricted cash - end of period$162,656 $55,409 $48,141 
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents$162,636 $52,389 $48,121 
Short term restricted cash— 3,000 — 
Long term restricted cash20 20 20 
Total cash, cash equivalents and restricted cash$162,656 $55,409 $48,141 
Supplemental cash flow disclosure:
Cash paid for amounts included in the measurement of lease liabilities$174 $154 $153 
Supplemental disclosure of non-cash operating activities:
Right-of-use assets related to the adoption of ASC 842$— $— $236 
Right-of-use assets obtained in exchange for lease obligations$— $290 $— 
Supplemental disclosure of non-cash financing activities:
Deemed Dividend on adjustment of exercise price on certain warrants$— $147 $— 
The accompanying notes are an integral part of these consolidated financial statements.


SESEN BIO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
1. DESCRIPTION OF BUSINESS
Sesen Bio, Inc. ("Sesen" or the “Company”), a Delaware corporation formed in February 2008, is a late-stage clinical company advancing targeted fusion protein therapeutics ("TFPTs") for the treatment of patients with cancer. The Company’s most advanced product candidate, VicineumTM, also known as VB4-845, is a locally-administered targeted fusion protein composed of an anti-epithelial cell adhesion molecule ("EpCAM") antibody fragment tethered to a truncated form of Pseudomonas exotoxin A related person transaction reviewed underfor the policy will be considered approved or ratified if it is authorized by the audit committee after full disclosuretreatment of non-muscle invasive CIS of the related person’s interestbladder in patients previously treated with bacillus Calmette-Guérin ("BCG"). The Company has an ongoing single-arm, multi-center, open-label Phase 3 VISTA clinical trial of Vicineum as a monotherapy in patients with BCG-unresponsive NMIBC (the "VISTA Trial"). The VISTA Trial completed enrollment in April 2018 with a total of 133 patients. On December 18, 2020, the Company submitted its completed Biologics License Application (the "BLA") for Vicineum for the treatment of BCG-unresponsive NMIBC to the United States Food and Drug Administration ("FDA"). On February 12, 2021, the FDA notified the Company that it has accepted for filing the BLA. The FDA also granted Priority Review for the BLA and set a target Prescription Drug User Fee Act ("PDUFA") date for a decision on the BLA of August 18, 2021. On July 13, 2021, the Company participated in a productive Late-Cycle Meeting with the FDA regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. In the meeting, the FDA confirmed that there was no Advisory Committee meeting planned at that time, and that no post-marketing requirements, including a confirmatory trial, had been identified at that time. Also in the transaction. As appropriatemeeting, the Company and the FDA discussed remaining questions related to manufacturing facilities inspection, product quality information requests and additional information related to chemistry, manufacturing and controls (“CMC”), and a timeline to submit additional supporting information was agreed upon. On August 13, 2021, the Company received a complete response letter (“CRL”) from the FDA indicating that the FDA had determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality.
The Company participated in Type A Meetings with the circumstances, the audit committee will reviewFDA on October 29, 2021 and consider:
theDecember 8, 2021 to discuss questions related person’s interestto CMC and clinical issues raised in the related person transaction;
CRL. Both meetings helped the approximate dollar valueCompany determine the appropriate path forward for Vicineum. Any changes in these assumptions and estimates or other information obtained, may have a significant impact on the remeasurement of the amount involvedcontingent consideration liability in the related person transaction;
the approximate dollar valuefuture. The Company believes it has a clear understanding of the amountwhat additional information regarding CMC is required for resubmission of the related person’s interesta BLA. Additionally, although not an issue raised in the transaction without regardCRL, the FDA confirmed that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical trials. The FDA also confirmed that the amount ofCompany can utilize Vicineum manufactured during process validation for any profit or loss;
whether the transaction was undertakenfuture clinical trials needed to address issues raised in the ordinary course of our business;
whether the terms of the transaction are no less favorable to us than termsCRL, and that could have been reached with an unrelated third party;
the purpose of, and thethese potential benefits to us of, the transaction; andtrials can proceed while addressing CMC issues.
any other information regarding the related person transaction or the related person in the context of the proposed transaction that would be material to investors in light of the circumstances of the particular transaction.
Our audit committee may approve or ratify the transaction only if it determines that, under all of the circumstances, the transaction is in, or is not inconsistent with, our best interests. Our audit committee may impose any conditions on the related person transaction that it deems appropriate.
In addition to the transactions that are excluded by the instructions to the SEC’s related person transaction disclosure rule, our board has determined that the following transactions do not create a material direct or indirect interest on behalf of related persons and, therefore, are not related person transactions for purposes of this policy:
interests arising solely from the related person’s position as an executive officer of another entity, whether or not the person is also a director of the entity, that is a participant in the transaction where the related person and all other related persons own in the aggregate less than a 10% equity interest in such entity, the related person and his or her immediate family members are not involved in the negotiation of the terms of the transaction and do not receive any special benefits as a result of the transaction and the amount involved in the transaction is less than the greater of $200,000 or 5% of the annual gross revenues of the company receiving payment under the transaction; and

a transaction that is specifically contemplated by provisions of our certificate of incorporation or by-laws.
The policy provides that transactions involving the compensation of executive officers shall be reviewed and approved by our compensation committee in the manner specified in the compensation committee’s charter.
Certain Relationships and Related Party Transactions
Since January 1, 2016, we have engaged in the following transactions with our directors, executive officers, holders of more than 5% of our voting securities, and affiliates or immediate family members of our directors, executive officers, and holders of more than 5% of our voting securities. We believe that all of these transactions were on terms as favorable as could have been obtained from unrelated third parties.
Viventia AcquisitionCONSOLIDATED BALANCE SHEETS
On September 20, 2016, we entered into a Share Purchase Agreement with Viventia, the Selling Shareholders(In thousands, except share and solely in its capacity as seller representative, Clairmark, an affiliate of Leslie Dan, one of our directors, pursuant to which we agreed to and simultaneously completed the acquisition of all of the outstanding capital stock of Viventia from the Selling Shareholders. The Selling Shareholders included Clairmark and Mr. Hurly, our chief executive officer. In connection with the closing of the Acquisition, we issued 4,013,431 shares of our common stock to the Selling Shareholders according to their pro rataper share of Viventia’s then-outstanding common shares, which represented approximately 19.9% of our voting power as of immediately prior to the issuance of such shares of our common stock.data)
In connection with the closing of the Acquisition, we entered into a registration rights agreement with Clairmark, pursuant to which Clairmark, has rights, subject to specific conditions, to require us to file registration statements covering the 3,582,328 shares it acquired in the Acquisition or to include such shares in registration statements that we may file for ourselves or other stockholders.
In connection with the forgiveness of certain debt held by Viventia immediately preceding the Acquisition, Viventia irrevocably assigned and set over the right to receive up to $814,000 in the form of research and development investment tax credits to and in favor of Clairmark. In October 2016, we received $697,000 in research and development investment tax credits and in November 2016, we remitted the same amount to Clairmark.
Manufacturing and Office Leases
We lease a manufacturing, laboratory, and office facility in Winnipeg, Manitoba, from an affiliate of Mr. Dan, under a five-year renewable lease through September 2020 with a right to renew the lease for one subsequent five-year term. We have an annual minimum rent obligation of $296,000 for this facility. During the year ended December 31, 2016, we incurred $86,000 in rent expense for this facility.
We also lease an office facility in Toronto, Ontario from an affiliate of Mr. Dan. The lease is on a month-to-month basis unless terminated by either party by giving the requisite notice. We pay approximately $2,000 per month for this office facility. During the year ended December 31, 2016, we incurred $5,000 in rent expense for this facility.
Protoden License
We are party to an intellectual property license agreement under which we pay fees to Protoden Technologies Inc., or Protoden, a company owned by Clairmark. Pursuant to the agreement, we have an exclusive, perpetual, irrevocable and non-royalty bearing license, with the right to sublicense, under certain patents and technology to make, use and sell products that utilize such patents and technology. The annual fee is $100,000. Beginning on January 1, 2025, the licenses granted to us will require no further payments to Protoden. During the year ended December 31, 2016, we paid $28,000 to Protoden under this license agreement.
Item 14.Principal Accountant Fees and Services.
Audit Fees and Services
Ernst & Young LLP provided audit and tax services to us consisting of the audit of our 2016 and 2015 financial statements and tax compliance services. The following table summarizes the fees for Ernst & Young LLP services to us for the last two fiscal years.

Fee Category 
Fiscal Year
2016
 
Fiscal Year
2015
Audit Fees(1) $453,200
 $473,860
Audit-Related Fees(2) 157,500
 
Tax Fees(3) 87,500
 8,500
All Other Fees(4) 
 
Total Fees $698,200
 $482,360
(1)Audit fees consist of fees for the audit of our annual financial statements.
(2)Audit-related fees for fiscal year 2016 were incurred in connection with the Roche License Agreement and Acquisition of Viventia. There were no audit-related fees for fiscal year 2015.
(3)Tax fees for fiscal years 2016 and 2015 consist of fees for tax compliance services. In addition, in 2016 we incurred tax fees in connection with a Section 382 study and the Acquisition of Viventia. Tax compliance services relate primarily to the preparation of our U.S. and Massachusetts tax returns.
(4)There were no other fees for fiscal years 2016 and 2015.
In 2014, the audit committee adopted a formal policy concerning approval of audit and non-audit services to be provided to us by our independent registered public accounting firm, Ernst & Young LLP. The policy requires that all services to be provided by Ernst & Young LLP, including audit services and permitted audit-related and non-audit services, be preapproved by the audit committee, provided that de minimis non-audit services may instead be approved in accordance with applicable SEC rules. The board pre-approved all audit and non-audit services provided by Ernst & Young LLP during fiscal year 2016 and 2015.

PART IV
Item 15.Exhibits and Financial Statement Schedules.
(a) Financial Statements
The following financial statements and supplementary data are included in Item 8 of this Annual Report on Form 10-K.
(b) Exhibits
The exhibits filed as part of this Annual Report on Form 10-K are set forth on the Exhibit Index immediately preceding such exhibits, and are incorporated herein by reference.

SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
ELEVEN BIOTHERAPEUTICS, INC.
By:/s/    Stephen A. Hurly        
Stephen A. Hurly
President and Chief Executive Officer
March 24, 2017
Pursuant to the requirements of the Securities and Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
/s/    Stephen A. HurlyDirector, President and Chief Executive Officer (Principal Executive Officer)March 24, 2017
Stephen A. Hurly
/s/   John J. McCabeChief Financial Officer (Principal Financial and Accounting Officer)March 24, 2017
John J. McCabe
/s/    Wendy L. Dixon, Ph.D.Chair of the Board of DirectorsMarch 24, 2017
Wendy L. Dixon, Ph.D.
/s/    Abbie C. CelnikerDirectorMarch 24, 2017
Abbie C. Celniker, Ph.D.
/s/    Paul G. ChaneyDirectorMarch 24, 2017
Paul G. Chaney
/s/    Leslie Dan, B.Sc. Phm,. M.B.A., C.M.DirectorMarch 24, 2017
Leslie Dan, B.Sc. Phm,. M.B.A., C.M.
/s/    Jay S. Duker, M.D.DirectorMarch 24, 2017
Jay S. Duker, M.D.
/s/    Barry J. Gertz, M.D., Ph.D.DirectorMarch 24, 2017
Barry J. Gertz, M.D., Ph.D.
/s/    Jane V. HendersonDirectorMarch 24, 2017
Jane V. Henderson
/s/    Daniel S. LynchDirectorMarch 24, 2017
Daniel S. Lynch

EXHIBIT INDEX
Exhibit
No.
Description
2.1Share Purchase Agreement, effective as of September 20, 2016, by and between Eleven Biotherapeutics, Inc., Viventia Bio Inc. and Clairmark Investments Ltd., as representative of the selling shareholders (we hereby agree to furnish supplementally a copy of any omitted schedules to the SEC upon request). Incorporated herein by reference to Exhibit 2.1 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
3.1Restated Certificate of Incorporation of Eleven Biotherapeutics, Inc. Incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K filed with the SEC on February 18, 2014 (File No. 001-36296).
3.2Amended and Restated By-laws of Eleven Biotherapeutics, Inc. Incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K filed with the SEC on April 16, 2015 (File No. 001-36296).
4.1Specimen Stock Certificate evidencing the shares of common stock. Incorporated by reference to Exhibit 4.1 to our Registration Statement on Form S-1/A filed with the SEC on January 23, 2014 (Reg. No. 333-193131).
4.2Amended and Restated Investors’ Rights Agreement of Eleven Biotherapetics, Inc. Incorporated by reference to Exhibit 4.2 to our Registration Statement on Form S-1/A filed with the SEC on January 23, 2014 (Reg. No. 333-193131).
4.3Registration Rights Agreement, dated as of September 20, 2016 by and among Eleven Biotherapeutics, Inc. and the shareholders named therein. Incorporated herein by reference to Exhibit 4.1 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
4.4Form of Warrant to Purchase Common Stock, by and between Eleven Biotherapeutics, Inc. and the persons party thereto. Incorporated by reference to Exhibit 10.2 to our Current Report on Form 8-K filed with the SEC on December 1, 2014 (File No. 001-36296).
4.5Form of Warrant issued to Silicon Valley Bank and Life Science Loans, LLC dated November 25, 2014. Incorporated by reference to Exhibit 10.23 to our Registration Statement on Form S-1 filed with the SEC on December 19, 2014 (Reg. No. 333-201176).
10.1+Amended and Restated 2009 Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to our Registration Statement on Form S-1 filed with the SEC on December 30, 2013 (Reg. No. 333-193131).
10.2+Form of Incentive Stock Option Agreement under the Amended and Restated 2009 Stock Incentive Plan. Incorporated by reference to Exhibit 10.2 to our Registration Statement on Form S-1 filed with the SEC on December 30, 2013 (Reg. No. 333-193131).
10.3+Form of Non-statutory Stock Option Agreement under the Amended and Restated 2009 Stock Incentive Plan. Incorporated by reference to Exhibit 10.3 to our Registration Statement on Form S-1 filed with the SEC on December 30, 2013 (Reg. No. 333-193131).
10.4+Form of Restricted Stock Agreement under the Amended and Restated 2009 Stock Incentive Plan. Incorporated by reference to Exhibit 10.4 to our Registration Statement on Form S-1 filed with the SEC on December 30, 2013 (Reg. No. 333-193131).
10.5+2014 Stock Incentive Plan. Incorporated by reference to Exhibit 10.5 to our Registration Statement on Form S-1/A filed with the SEC on January 23, 2014 (Reg. No. 333-193131).
10.6+Form of Incentive Stock Option Agreement under 2014 Stock Incentive Plan. Incorporated by reference to Exhibit 10.6 to our Registration Statement on Form S-1/A filed with the SEC on January 23, 2014 (Reg. No. 333-193131).
10.7+Form of Non-statutory Stock Option Agreement under 2014 Stock Incentive Plan. Incorporated by reference to Exhibit 10.7 to our Registration Statement on Form S-1/A filed with the SEC on January 23, 2014 (Reg. No. 333-193131).
10.8+Form of Restricted Stock Unit Agreement under 2014 Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to our Current Report on Form 8-K filed with the SEC on June 29, 2015 (File No. 001-36296).

10.9Form of Indemnification Agreement by and between Eleven Biotherapeutics, Inc. and each of its directors and executive officers. Incorporated by reference to Exhibit 10.12 to our Registration Statement on Form S-1/A filed with the SEC on January 23, 2014 (Reg. No. 333-193131).
10.10+2014 Employee Stock Purchase Plan. Incorporated by reference to Exhibit 10.13 to our Registration Statement on Form S-1/A filed with the SEC on January 23, 2014 (Reg. No. 333-193131).
10.11+Employment Agreement, dated August 28, 2015, by and between Eleven Biotherapeutics, Inc. and John J. McCabe. Incorporated herein by reference to Exhibit 10.17 to our Annual Report on Form 10-K filed on March 24, 2016 (File No. 001-36296).
10.12+Form of Director Restricted Stock Agreement under 2014 Stock Incentive Plan. Incorporated by reference to Exhibit 10.18 to our Registration Statement on Form S-1/A filed with the SEC on January 23, 2014 (Reg. No. 333-193131).
10.13†

License Agreement, dated as of June 10, 2016, by and among Eleven Biotherapeutics, Inc., F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. Incorporated herein by reference to Exhibit 10.1 to our Quarterly Report on Form 10-Q filed on August 12, 2016 (File No. 001-36296).
10.14†

License Agreement, effective January 13, 2003, as amended and restated on October 14, 2015, by and between The University of Zurich and Viventia Bio Inc. Incorporated herein by reference to Exhibit 10.1 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
10.15†

Amended & Restated Exclusive License Agreement, dated October 14, 2015, by and between Merck KGaA and Viventia Bio Inc. Incorporated herein by reference to Exhibit 10.2 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).

10.16Amended and Restated License Agreement, dated October 17, 2014, by and between Clairmark Investments Ltd. (successor in interest of Protoden Technologies Inc.) and Viventia Bio Inc. Incorporated herein by reference to Exhibit 10.3 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
10.17Indenture, dated March 31, 2000, between 131-149 Hamelin Street Leaseholds Limited (successor in interest of Almad Investments Limited) and Viventia Bio Inc. (successor in interest of Viventia Biotech Inc.), as amended by Lease Amending Agreement, dated June 26, 2003, as further amended by Lease Amending Agreement, dated January 26, 2004, and as further amended by Letter Agreement, dated June 25, 2008, and as further amended by Lease Amending Agreement, September 16, 2015. Incorporated herein by reference to Exhibit 10.4 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
10.18+Separation Agreement dated September 20, 2016 between Eleven Biotherapeutics, Inc. and Abbie C. Celniker. Incorporated herein by reference to Exhibit 10.5 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
10.19+Separation Agreement dated September 20, 2016 between Eleven Biotherapeutics, Inc. and Karen L. Tubridy. Incorporated herein by reference to Exhibit 10.6 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
10.20+Retention Letter Agreement dated September 20, 2016 between Eleven Biotherapeutics, Inc. and John J. McCabe. Incorporated herein by reference to Exhibit 10.7 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
10.21+
Amendment to Retention Letter Agreement, dated March 5, 2017, by and between Eleven Biotherapeutics, Inc. and John J. McCabe. Incorporated herein by reference to Exhibit 10.1 to our Current Report on Form 8-K filed on March 6, 2017 (File No. 001-36296).

10.22+Employment Agreement dated September 20, 2016 between Eleven Biotherapeutics, Inc. and Stephen A. Hurly. Incorporated herein by reference to Exhibit 10.8 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
10.23+Employment Agreement dated September 20, 2016 between Eleven Biotherapeutics, Inc. and Arthur P. DeCillis. Incorporated herein by reference to Exhibit 10.9 to our Current Report on Form 8-K filed on September 21, 2016 (File No. 001-36296).
10.24Agreement for Termination of Lease and Voluntary Surrender of Premises, dated October 14, 2016, between Eleven Biotherapeutics, Inc. and ARE-MA Region No. 38, LLC. Incorporated herein by reference to Exhibit 10.10 to our Quarterly Report on Form 10-Q filed on November 14, 2016 (File No. 001-36296).
21.1*Subsidiaries of Eleven Biotherapeutics, Inc.
23.1*Consent of Ernst & Young LLP

31.1*Rule 13a-14(a) Certification of Principal Executive Officer
31.2*Rule 13a-14(a) Certification of Principal Financial Officer
32.1*Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. §1350
101.INS*XBRL Instance Document
101.SCH*XBRL Taxonomy Extension Schema Document
101.CAL*XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*XBRL Taxonomy Extension Label Linkbase Document
101.PRE*XBRL Taxonomy Extension Presentation Linkbase Document
*Filed herewith.
+This exhibit is a compensatory plan or arrangement in which our executive officers or directors participate.
Confidential treatment requested as to portions of the exhibit. Confidential materials omitted and filed separately with the Securities and Exchange Commission.


INDEX TO FINANCIAL STATEMENTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
The Board of Directors and Stockholders of
Eleven Biotherapeutics, Inc.
We have audited the accompanying consolidated balance sheets of Eleven Biotherapeutics, Inc. (the “Company”) as of December 31, 2016 and 2015, and the related consolidated statements of operations and comprehensive income (loss), convertible preferred stock and stockholders’ equity (deficit), and cash flows for each of the three years in the period ended December 31, 2016. These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements based on our audits.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. We were not engaged to perform an audit of the Company’s internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.
In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Eleven Biotherapeutics, Inc. at December 31, 2016 and 2015, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2016 in conformity with U.S. generally accepted accounting principles.
December 31,
20212020
Assets
Current assets:
Cash and cash equivalents$162,636 $52,389 
Accounts receivables21,011 — 
Other receivables3,482 — 
Prepaid expenses and other current assets18,476 7,478 
Restricted Cash— 3,000 
Total current assets205,605 62,867 
Non-current assets:
Restricted cash20 20 
Property and equipment, net43 123 
Intangible assets14,700 46,400 
Goodwill13,064 13,064 
Long term prepaid expenses7,192 — 
Other assets123 349 
Total non-current assets$35,142 $59,956 
                         Total Assets$240,747 $122,823 
Liabilities and Stockholders’ Equity (Deficit)
Current liabilities:
Accounts payable$2,853 $3,102 
Accrued expenses8,255 3,973 
Deferred revenue— 1,500 
Contingent consideration— 8,985 
Other current liabilities460 489 
Total current liabilities11,568 18,049 
Non-current liabilities:
Contingent consideration, net of current portion52,000 99,855 
Deferred tax liability3,969 12,528 
Deferred revenue, net of current portion1,500 1,500 
Other non-current liabilities— 118 
Total non-current liabilities57,469 114,001 
                         Total Liabilities69,037 132,050 
Stockholders’ Equity (Deficit):
Preferred stock, $0.001 par value per share; 5,000,000 shares authorized at December 31, 2021 and 2020; no shares issued and outstanding at December 31, 2021 and 2020— — 
Common stock, $0.001 par value per share; 400,000,000 and 200,000,000 shares authorized at December 31, 2021 and 2020; 199,463,645 and 140,449,647 shares issued and outstanding at December 31, 2021 and 2020, respectively199 140 
Additional paid-in capital487,768 306,554 
Accumulated deficit(316,257)(315,921)
Total Stockholders’ Equity (Deficit)171,710 (9,227)
Total Liabilities and Stockholders’ Equity$240,747 $122,823 
The accompanying notes are an integral part of these consolidated financial statementsstatements.
F-5


SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
(In thousands, except per share data)
Year ended December 31,
202120202019
Revenue:
License and related revenue$26,544 $11,236 $— 
Total Revenue26,544 11,236 — 
Operating expenses:
Research and development25,312 29,191 24,663 
General and administrative29,393 14,302 12,208 
Restructuring charge5,528 — — 
Intangibles impairment charge31,700 — — 
Change in fair value of contingent consideration(56,840)(11,180)71,620 
Total operating expenses35,093 32,313 108,491 
Loss from Operations$(8,549)$(21,077)$(108,491)
Other (expense) income, net(60)125 991 
Loss Before Taxes$(8,609)$(20,952)$(107,500)
Benefit (provision) from income taxes$8,273 $(1,445)$— 
Net Loss and Comprehensive Loss After Taxes$(336)$(22,397)$(107,500)
Deemed dividend on adjustment of exercise price of certain warrants$— $(147)$— 
Net loss attributable to common stockholders - basic and diluted$(336)$(22,544)$(107,500)
Net loss per common share - basic and diluted$— $(0.19)$(1.18)
Weighted-average common shares outstanding - basic and diluted$182,323 $118,221 $90,929 
The accompanying notes are an integral part of these consolidated financial statements.
F-6


SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (DEFICIT)
(In thousands, except share data)
Common StockAdditional
Paid-in
Capital
Accumulated
Deficit
Stockholders’
Equity (Deficit)
SharesAmount
Balance at December 31, 201877,456,180 $77 $230,154 $(186,024)$44,207 
Net loss— — — (107,500)(107,500)
Share-based compensation— — 1,237 — 1,237 
Exercises of stock options and vesting of RSAs89,812 — 98 — 98 
Sales of common stock under 2014 ESPP10,283 — — 
Issuance of common stock and common stock warrants, net of issuance costs of $2.2 million20,410,000 21 27,812 — 27,833 
Exercises of common stock warrants6,772,928 5,474 — 5,481 
Issuance of common stock under ATM Offering, net of issuance costs of $0.2 million2,062,206 1,934 — 1,936 
Balance at December 31, 2019106,801,409 107 266,717 (293,524)(26,700)
Net loss— — — (22,397)(22,397)
Share-based compensation— — 1,757 — 1,757 
Exercises of stock options12,000 — 13 — 13 
Sales of common stock under 2014 ESPP28,186 — 11 — 11 
Exercises of common stock warrants238,110 — 131 — 131 
Issuance of common stock under ATM Offering, net of issuance costs of $1.2 million33,369,942 33 37,925 37,958 
Balance at December 31, 2020140,449,647 140 306,554 (315,921)(9,227)
Net loss— — — $(336)(336)
Share-based compensation— — 5,143 — 5,143 
Exercises of stock options33,610 — 42 — 42 
Exercises of common stock warrants2,048,059 1,124 — 1,126 
Issuance of common stock under ATM Offering, net of issuance costs of $5.4 million56,932,329 57 174,905 — 174,962 
Balance at December 31, 2021199,463,645 $199 $487,768 $(316,257)$171,710 
The accompanying notes are an integral part of these consolidated financial statements.
F-7


SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)
 Year ended December 31,
 202120202019
Cash Flows from Operating Activities:
Net loss$(336)$(22,397)$(107,500)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation85 122 219 
Share-based compensation5,143 1,757 1,237 
Change in fair value of contingent consideration(56,840)(11,180)71,620 
       Intangibles impairment charge31,700 — — 
Changes in operating assets and liabilities:
Accounts receivable (net)(24,493)— — 
Prepaid expenses and other assets(17,964)(1,304)(5,188)
Accounts payable(249)1,200 535 
Accrued expenses and other liabilities(4,424)(2,035)1,556 
Deferred revenue(1,500)3,000 — 
                      Net cash used in operating activities(68,878)(30,837)(37,521)
Cash Flows from Investing Activities:
Purchases of equipment(4)(8)(136)
                      Net cash used in investing activities(4)(8)(136)
Cash Flows from Financing Activities:
Proceeds from issuance of common stock and common stock warrants, net of issuance costs— — 27,833 
Proceeds from exercises of common stock warrants1,126 131 5,481 
Proceeds from issuance of common stock under ATM Offering, net of
issuance costs
174,962 37,958 1,936 
Proceeds from exercises of stock options42 13 98 
Proceeds from sale of common stock pursuant to ESPP— 11 
Net cash provided by financing activities176,129 38,113 35,356 
Net increase (decrease) in cash, cash equivalents and restricted cash107,247 7,268 (2,301)
Cash, cash equivalents and restricted cash - beginning of period55,409 48,141 50,442 
Cash, cash equivalents and restricted cash - end of period$162,656 $55,409 $48,141 
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents$162,636 $52,389 $48,121 
Short term restricted cash— 3,000 — 
Long term restricted cash20 20 20 
Total cash, cash equivalents and restricted cash$162,656 $55,409 $48,141 
Supplemental cash flow disclosure:
Cash paid for amounts included in the measurement of lease liabilities$174 $154 $153 
Supplemental disclosure of non-cash operating activities:
Right-of-use assets related to the adoption of ASC 842$— $— $236 
Right-of-use assets obtained in exchange for lease obligations$— $290 $— 
Supplemental disclosure of non-cash financing activities:
Deemed Dividend on adjustment of exercise price on certain warrants$— $147 $— 
The accompanying notes are an integral part of these consolidated financial statements.


SESEN BIO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
1. DESCRIPTION OF BUSINESS
Sesen Bio, Inc. ("Sesen" or the “Company”), a Delaware corporation formed in February 2008, is a late-stage clinical company advancing targeted fusion protein therapeutics ("TFPTs") for the treatment of patients with cancer. The Company’s most advanced product candidate, VicineumTM, also known as VB4-845, is a locally-administered targeted fusion protein composed of an anti-epithelial cell adhesion molecule ("EpCAM") antibody fragment tethered to a truncated form of Pseudomonas exotoxin A for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with bacillus Calmette-Guérin ("BCG"). The Company has an ongoing single-arm, multi-center, open-label Phase 3 VISTA clinical trial of Vicineum as a monotherapy in patients with BCG-unresponsive NMIBC (the "VISTA Trial"). The VISTA Trial completed enrollment in April 2018 with a total of 133 patients. On December 18, 2020, the Company submitted its completed Biologics License Application (the "BLA") for Vicineum for the treatment of BCG-unresponsive NMIBC to the United States Food and Drug Administration ("FDA"). On February 12, 2021, the FDA notified the Company that it has accepted for filing the BLA. The FDA also granted Priority Review for the BLA and set a target Prescription Drug User Fee Act ("PDUFA") date for a decision on the BLA of August 18, 2021. On July 13, 2021, the Company participated in a productive Late-Cycle Meeting with the FDA regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. In the meeting, the FDA confirmed that there was no Advisory Committee meeting planned at that time, and that no post-marketing requirements, including a confirmatory trial, had been identified at that time. Also in the meeting, the Company and the FDA discussed remaining questions related to manufacturing facilities inspection, product quality information requests and additional information related to chemistry, manufacturing and controls (“CMC”), and a timeline to submit additional supporting information was agreed upon. On August 13, 2021, the Company received a complete response letter (“CRL”) from the FDA indicating that the FDA had determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality.
The Company participated in Type A Meetings with the FDA on October 29, 2021 and December 8, 2021 to discuss questions related to CMC and clinical issues raised in the CRL. Both meetings helped the Company determine the appropriate path forward for Vicineum. Any changes in these assumptions and estimates or other information obtained, may have been prepared assuminga significant impact on the remeasurement of the contingent consideration liability in the future. The Company believes it has a clear understanding of what additional information regarding CMC is required for resubmission of a BLA. Additionally, although not an issue raised in the CRL, the FDA confirmed that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical trials. The FDA also confirmed that the Company will continue as a going concern. As discussedcan utilize Vicineum manufactured during process validation for any future clinical trials needed to address issues raised in Note 1 to the financial statements, the Company has recurring losses from operationsCRL, and insufficient cash resources that raise substantial doubt about the Company’s ability to continue as a going concern. Management’s plans in regard to these matters are described in Note 1. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.potential trials can proceed while addressing CMC issues.

/s/ Ernst & Young LLP
Boston, Massachusetts
March 24, 2017

ELEVEN BIOTHERAPEUTICS, INC.
CONSOLIDATED BALANCE SHEETS
(inIn thousands, except share and per share data)
December 31,
20212020
Assets
Current assets:
Cash and cash equivalents$162,636 $52,389 
Accounts receivables21,011 — 
Other receivables3,482 — 
Prepaid expenses and other current assets18,476 7,478 
Restricted Cash— 3,000 
Total current assets205,605 62,867 
Non-current assets:
Restricted cash20 20 
Property and equipment, net43 123 
Intangible assets14,700 46,400 
Goodwill13,064 13,064 
Long term prepaid expenses7,192 — 
Other assets123 349 
Total non-current assets$35,142 $59,956 
                         Total Assets$240,747 $122,823 
Liabilities and Stockholders’ Equity (Deficit)
Current liabilities:
Accounts payable$2,853 $3,102 
Accrued expenses8,255 3,973 
Deferred revenue— 1,500 
Contingent consideration— 8,985 
Other current liabilities460 489 
Total current liabilities11,568 18,049 
Non-current liabilities:
Contingent consideration, net of current portion52,000 99,855 
Deferred tax liability3,969 12,528 
Deferred revenue, net of current portion1,500 1,500 
Other non-current liabilities— 118 
Total non-current liabilities57,469 114,001 
                         Total Liabilities69,037 132,050 
Stockholders’ Equity (Deficit):
Preferred stock, $0.001 par value per share; 5,000,000 shares authorized at December 31, 2021 and 2020; no shares issued and outstanding at December 31, 2021 and 2020— — 
Common stock, $0.001 par value per share; 400,000,000 and 200,000,000 shares authorized at December 31, 2021 and 2020; 199,463,645 and 140,449,647 shares issued and outstanding at December 31, 2021 and 2020, respectively199 140 
Additional paid-in capital487,768 306,554 
Accumulated deficit(316,257)(315,921)
Total Stockholders’ Equity (Deficit)171,710 (9,227)
Total Liabilities and Stockholders’ Equity$240,747 $122,823 
The accompanying notes are an integral part of these consolidated financial statements.
F-5
 December 31,
 2016 2015
Assets   
Current assets:   
Cash and cash equivalents$25,342
 $36,079
Prepaid expenses and other current assets585
 232
Total current assets25,927
 36,311
Property and equipment, net796
 407
Restricted cash10
 94
Intangible assets60,500
 
Goodwill16,864
 
Other assets
 13
Total assets$104,097
 $36,825
Liabilities and stockholders’ equity   
Current liabilities:   
Accounts payable$1,667
 $1,246
Accrued expenses1,774
 1,794
Notes payable, current portion
 4,134
Deferred revenue, current portion425
 406
Due to related party114


Total current liabilities3,980
 7,580
Other liabilities
 423
Notes payable, net of current portion
 9,763
Warrant liability5
 115
Deferred tax liability16,335
 
Contingent consideration45,100
 
Commitments and contingencies (Note 9)
 
Stockholders’ equity:   
Preferred stock, $0.001 par value per share; 5,000,000 shares authorized at December 31, 2016 and 2015 and no shares issued and outstanding at December 31, 2016 and 2015
 
Common stock, $0.001 par value per share; 200,000,000 shares authorized at December 31, 2016 and 2015 and 24,531,964 and 19,619,124 shares issued and outstanding at December 31, 2016 and 2015, respectively25
 20
Additional paid-in capital161,963
 144,126
Accumulated deficit(123,311) (125,202)
Total stockholders’ equity38,677
 18,944
Total liabilities and stockholders’ equity$104,097
 $36,825


See accompanying notes.


ELEVEN BIOTHERAPEUTICS,SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)LOSS
(inIn thousands, except per share data)
Year ended December 31,
202120202019
Revenue:
License and related revenue$26,544 $11,236 $— 
Total Revenue26,544 11,236 — 
Operating expenses:
Research and development25,312 29,191 24,663 
General and administrative29,393 14,302 12,208 
Restructuring charge5,528 — — 
Intangibles impairment charge31,700 — — 
Change in fair value of contingent consideration(56,840)(11,180)71,620 
Total operating expenses35,093 32,313 108,491 
Loss from Operations$(8,549)$(21,077)$(108,491)
Other (expense) income, net(60)125 991 
Loss Before Taxes$(8,609)$(20,952)$(107,500)
Benefit (provision) from income taxes$8,273 $(1,445)$— 
Net Loss and Comprehensive Loss After Taxes$(336)$(22,397)$(107,500)
Deemed dividend on adjustment of exercise price of certain warrants$— $(147)$— 
Net loss attributable to common stockholders - basic and diluted$(336)$(22,544)$(107,500)
Net loss per common share - basic and diluted$— $(0.19)$(1.18)
Weighted-average common shares outstanding - basic and diluted$182,323 $118,221 $90,929 
The accompanying notes are an integral part of these consolidated financial statements.
F-6
 Year Ended December 31,
 2016 2015 2014
Revenue:     
     Collaboration revenue$406
 $490
 $2,243
     License revenue29,575
 500
 
Total revenue29,981
 990
 2,243
Operating expenses:     
Research and development13,479
 26,336
 26,703
General and administrative14,736
 9,850
 8,471
(Gain) loss from change in fair value of contingent consideration(1,100) 


Total operating expenses27,115
 36,186
 35,174
Income (loss) from operations2,866
 (35,196) (32,931)
Other income (expense):     
Other income (expense), net(723) 3,139
 (849)
Interest expense(247) (1,395) (376)
Total other income (expense), net(970) 1,744
 (1,225)
Net income (loss) before income taxes1,896
 (33,452)
(34,156)
      Provision for income taxes5
 


Net income (loss) and comprehensive income (loss)$1,891
 $(33,452)
$(34,156)
Cumulative preferred stock dividends and accretion of preferred stock discount
 
 (519)
Net income (loss) applicable to common stockholders$1,891
 $(33,452) $(34,675)
Net income (loss) per share applicable to common stockholders—basic$0.09
 $(1.76) $(2.37)
Weighted-average number of common shares used in net income (loss) per share applicable to common stockholders—basic21,083
 18,993
 14,644
Net income (loss) per share applicable to common stockholders-diluted$0.09
 $(1.76)
$(2.37)
Weighted-average number of common shares used in net income (loss) per share applicable to common stockholders—diluted21,733
 18,993

14,644


See accompanying notes.

ELEVEN BIOTHERAPEUTICS,SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK ANDCHANGES IN STOCKHOLDERS’ EQUITY (DEFICIT)
(In thousands, except share data)
Common StockAdditional
Paid-in
Capital
Accumulated
Deficit
Stockholders’
Equity (Deficit)
SharesAmount
Balance at December 31, 201877,456,180 $77 $230,154 $(186,024)$44,207 
Net loss— — — (107,500)(107,500)
Share-based compensation— — 1,237 — 1,237 
Exercises of stock options and vesting of RSAs89,812 — 98 — 98 
Sales of common stock under 2014 ESPP10,283 — — 
Issuance of common stock and common stock warrants, net of issuance costs of $2.2 million20,410,000 21 27,812 — 27,833 
Exercises of common stock warrants6,772,928 5,474 — 5,481 
Issuance of common stock under ATM Offering, net of issuance costs of $0.2 million2,062,206 1,934 — 1,936 
Balance at December 31, 2019106,801,409 107 266,717 (293,524)(26,700)
Net loss— — — (22,397)(22,397)
Share-based compensation— — 1,757 — 1,757 
Exercises of stock options12,000 — 13 — 13 
Sales of common stock under 2014 ESPP28,186 — 11 — 11 
Exercises of common stock warrants238,110 — 131 — 131 
Issuance of common stock under ATM Offering, net of issuance costs of $1.2 million33,369,942 33 37,925 37,958 
Balance at December 31, 2020140,449,647 140 306,554 (315,921)(9,227)
Net loss— — — $(336)(336)
Share-based compensation— — 5,143 — 5,143 
Exercises of stock options33,610 — 42 — 42 
Exercises of common stock warrants2,048,059 1,124 — 1,126 
Issuance of common stock under ATM Offering, net of issuance costs of $5.4 million56,932,329 57 174,905 — 174,962 
Balance at December 31, 2021199,463,645 $199 $487,768 $(316,257)$171,710 
The accompanying notes are an integral part of these consolidated financial statements.
F-7
 
Series A
Convertible
Preferred Stock
 
Series B
Convertible
Preferred Stock
 Common Stock 
Additional
Paid-in
Capital
 
Accumulated
Deficit
 
Stockholders’
Equity
(Deficit)
 Shares Amount Shares Amount Shares Amount 
 (in thousands, except share data)
Balance at December 31, 201345,250,000
 $45,035
 7,203,845
 $11,643
 1,636,137
 $2
 $3,260
 $(57,594) $(54,332)
Initial public offering, net of issuance costs of $7.3 million(45,250,000) (45,035) (7,203,845) (11,643) 14,010,424
 14
 106,868
 
 106,882
Issuance of common stock, net of issuance costs of $1.5 million
 
 
 
 1,743,680
 2
 15,417
 
 15,419
Exercise of stock options and vesting of restricted stock awards
 
 
 
 190,701
 
 65
 
 65
Exercise of warrants
 
 
 
 352,318
 
 15
 
 15
Conversion of preferred stock warrant to common stock warrant
 
 
 
 
 
 247
 
 247
Issuance of common stock warrants in connection with notes payable
 
 
 
 
 
 254
 
 254
Stock-based compensation expense
 
 
 
 
 
 2,432
 
 2,432
Net loss
 
 
 
 
 
 
 (34,156) (34,156)
Balance at December 31, 2014
 
 
 
 17,933,260
 18
 128,558
 (91,750) 36,826
Issuance of common stock, net of issuance costs of $819,000
 
 
 
 1,446,781
 2
 12,648
 
 12,650
Exercise of stock options and vesting of restricted stock awards
 
 
 
 239,083
 
 63
 
 63
Issuance of common stock warrants in connection with notes payable
 
 
 
 
 
 328
 
 328
Stock-based compensation expense
 
 
 
 
 
 2,529
 
 2,529
Net loss
 
 
 
 
 
 
 (33,452) (33,452)
Balance at December 31, 2015
 
 
 
 19,619,124
 20
 144,126
 (125,202) 18,944
Exercise of stock options and vesting of restricted stock awards
 
 
 
 810,538
 1
 268
 
 269
Issuance of common stock pursuant to the ESPP
 
 
 
 88,871
 
 35
 
 35
Issuance of common stock in connection with the acquisition of Viventia
 
 
 
 4,013,431
 4
 13,521
 
 13,525
Stock-based compensation expense
 
 
 
 
 
 4,013
 
 4,013
Net income
 
 
 
 
 
 
 1,891
 1,891
Balance at December 31, 2016
 $
 
 $
 24,531,964
 $25
 $161,963
 $(123,311) $38,677


See accompanying notes.

ELEVEN BIOTHERAPEUTICS,SESEN BIO, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(inIn thousands)
 Year ended December 31,
 202120202019
Cash Flows from Operating Activities:
Net loss$(336)$(22,397)$(107,500)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation85 122 219 
Share-based compensation5,143 1,757 1,237 
Change in fair value of contingent consideration(56,840)(11,180)71,620 
       Intangibles impairment charge31,700 — — 
Changes in operating assets and liabilities:
Accounts receivable (net)(24,493)— — 
Prepaid expenses and other assets(17,964)(1,304)(5,188)
Accounts payable(249)1,200 535 
Accrued expenses and other liabilities(4,424)(2,035)1,556 
Deferred revenue(1,500)3,000 — 
                      Net cash used in operating activities(68,878)(30,837)(37,521)
Cash Flows from Investing Activities:
Purchases of equipment(4)(8)(136)
                      Net cash used in investing activities(4)(8)(136)
Cash Flows from Financing Activities:
Proceeds from issuance of common stock and common stock warrants, net of issuance costs— — 27,833 
Proceeds from exercises of common stock warrants1,126 131 5,481 
Proceeds from issuance of common stock under ATM Offering, net of
issuance costs
174,962 37,958 1,936 
Proceeds from exercises of stock options42 13 98 
Proceeds from sale of common stock pursuant to ESPP— 11 
Net cash provided by financing activities176,129 38,113 35,356 
Net increase (decrease) in cash, cash equivalents and restricted cash107,247 7,268 (2,301)
Cash, cash equivalents and restricted cash - beginning of period55,409 48,141 50,442 
Cash, cash equivalents and restricted cash - end of period$162,656 $55,409 $48,141 
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents$162,636 $52,389 $48,121 
Short term restricted cash— 3,000 — 
Long term restricted cash20 20 20 
Total cash, cash equivalents and restricted cash$162,656 $55,409 $48,141 
Supplemental cash flow disclosure:
Cash paid for amounts included in the measurement of lease liabilities$174 $154 $153 
Supplemental disclosure of non-cash operating activities:
Right-of-use assets related to the adoption of ASC 842$— $— $236 
Right-of-use assets obtained in exchange for lease obligations$— $290 $— 
Supplemental disclosure of non-cash financing activities:
Deemed Dividend on adjustment of exercise price on certain warrants$— $147 $— 
The accompanying notes are an integral part of these consolidated financial statements.


 Year Ended December 31,
 2016 2015 2014
Operating activities     
Net income (loss)$1,891
 $(33,452) $(34,156)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:     
Depreciation and amortization178
 366
 410
Non-cash interest expense26
 108
 36
Stock-based compensation expense4,013
 2,529
 2,432
Change in fair value of warrant liability(110) (3,104) 123
(Gain) loss from change in fair value of contingent consideration(1,100) 
 
Loss on extinguishment of debt221
 
 459
Gain on sale of equipment(24) 
 
Expense related to issuance costs allocated to warrants measured at fair value
 
 276
Changes in operating assets and liabilities:     
Prepaid expenses and other assets800
 110
 (259)
Restricted cash84
 
 
Accounts payable(742) (1,212) 1,021
Accrued expenses(1,936) 226
 1,315
Deferred revenue19
 (100) (964)
Due to related party(698) 
 
Net cash provided by (used in) operating activities2,622
 (34,529) (29,307)
Investing activities     
Cash acquired in acquisition136
 
 
Sale (purchases) of property and equipment325
 (287) (137)
Net cash provided by (used in) investing activities461
 (287) (137)
Financing activities     
Proceeds from issuance of notes payable, net of debt issuance costs
 5,000
 9,883
Payments on equipment financing and notes payable(14,124) (877) (4,633)
Proceeds from issuance of common stock and common stock warrants, net of issuance costs
 12,650
 70,237
Proceeds from exercise of common stock options and common stock warrants269
 63
 74
Proceeds from sale of common stock pursuant to ESPP35
 
 
Net cash (used in) provided by financing activities(13,820) 16,836
 75,561
Net (decrease) increase in cash and cash equivalents(10,737) (17,980) 46,117
Cash and cash equivalents at beginning of period36,079
 54,059
 7,942
Cash and cash equivalents at end of period$25,342
 $36,079
 $54,059
Supplemental non-cash investing and financing activities     
Common stock issued in connection with the acquisition (Note 3)13,525
 
 
Fair value of assets acquired and liabilities assumed in the acquisition (Note 3):     
Fair value of assets acquired in the acquisition, excluding cash$79,366
 $
 $
Fair value of liabilities assumed in the acquisition$19,777
 $
 $
Conversion of Series A and Series B preferred stock into 8,260,444 shares of common stock$
 $
 $56,678
Conversion of preferred stock warrants into common stock warrants$
 $
 $247
Issuance of warrants to purchase common stock$
 $328
 $3,300
Supplemental cash flow information     
Cash paid for interest$663
 $930
 $335
See accompanying notes.

ELEVEN BIOTHERAPEUTICS,SESEN BIO, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
1. Organization and Basis of PresentationDESCRIPTION OF BUSINESS
Eleven Biotherapeutics,Sesen Bio, Inc. (the("Sesen" or the “Company”), a Delaware corporation formed onin February 25, 2008, is a biologics oncologylate-stage clinical company primarily focused on designing, engineering and developingadvancing targeted fusion protein therapeutics ("TPTs"TFPTs"). for the treatment of patients with cancer. The Company's TPTs are singleCompany’s most advanced product candidate, VicineumTM, also known as VB4-845, is a locally-administered targeted fusion protein therapeutics composed of targeting moieties genetically fused via linker domainsan anti-epithelial cell adhesion molecule ("EpCAM") antibody fragment tethered to cytotoxic protein payloads that are produced througha truncated form of Pseudomonas exotoxin A for the Company's proprietary one-step manufacturing process. The Company targets tumor cell surface antigens that allow for rapid internalization intotreatment of non-muscle invasive CIS of the targeted cancer cell and have limited expression on normal cells.bladder in patients previously treated with bacillus Calmette-Guérin ("BCG"). The Company has designedan ongoing single-arm, multi-center, open-label Phase 3 VISTA clinical trial of Vicineum as a monotherapy in patients with BCG-unresponsive NMIBC (the "VISTA Trial"). The VISTA Trial completed enrollment in April 2018 with a total of 133 patients. On December 18, 2020, the Company submitted its TPTscompleted Biologics License Application (the "BLA") for Vicineum for the treatment of BCG-unresponsive NMIBC to overcome the fundamental efficacyUnited States Food and safety challenges inherentDrug Administration ("FDA"). On February 12, 2021, the FDA notified the Company that it has accepted for filing the BLA. The FDA also granted Priority Review for the BLA and set a target Prescription Drug User Fee Act ("PDUFA") date for a decision on the BLA of August 18, 2021. On July 13, 2021, the Company participated in existing antibody drug conjugates ("ADCs"a productive Late-Cycle Meeting with the FDA regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. In the meeting, the FDA confirmed that there was no Advisory Committee meeting planned at that time, and that no post-marketing requirements, including a confirmatory trial, had been identified at that time. Also in the meeting, the Company and the FDA discussed remaining questions related to manufacturing facilities inspection, product quality information requests and additional information related to chemistry, manufacturing and controls (“CMC”), whereand a payload is chemically attachedtimeline to submit additional supporting information was agreed upon. On August 13, 2021, the Company received a complete response letter (“CRL”) from the FDA indicating that the FDA had determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a targeting antibody.recent pre-approval inspection and product quality.
The Company participated in Type A Meetings with the FDA on October 29, 2021 and December 8, 2021 to discuss questions related to CMC and clinical issues raised in the CRL. Both meetings helped the Company determine the appropriate path forward for Vicineum. Any changes in these assumptions and estimates or other information obtained, may have a significant impact on the remeasurement of the contingent consideration liability in the future. The Company believes it has a clear understanding of what additional information regarding CMC is required for resubmission of a BLA. Additionally, although not an issue raised in the CRL, the FDA confirmed that Vicineum manufactured using the proposed commercial process is comparable to Vicineum used in prior clinical trials. The FDA also confirmed that the Company can utilize Vicineum manufactured during process validation for any future clinical trials needed to address issues raised in the CRL, and that these potential trials can proceed while addressing CMC issues.
Viventia Acquisition
In September 2016, the Company entered into a Share Purchase Agreement with Viventia Bio, Inc., a corporation incorporated under the laws of the Province of Ontario, Canada ("Viventia"), the shareholders of Viventia named therein (the “Selling Shareholders”) and, solely in its capacity as seller representative, Clairmark Investments Ltd., a corporation incorporated under the laws of the Province of Ontario, Canada (“Clairmark”) (the “Share Purchase Agreement”), pursuant to which the Company agreed to and simultaneously completed the acquisition of all of the outstanding capital stock of Viventia from the Selling Shareholders (the “Viventia Acquisition”). In connection with the closing of the Viventia Acquisition, the Company issued 4.0 million shares of its common stock to the Selling Shareholders, which at that time represented approximately 19.9% of the voting power of the Company as of immediately prior to the issuance of such shares. Clairmark is an affiliate of Leslie L. Dan, a director of the Company until his retirement in July 2019.
In addition, under the Share Purchase Agreement, the Company is obligated to pay to the Selling Shareholders certain post-closing contingent cash payments upon the achievement of specified milestones and based upon net sales, in each case subject to the terms and conditions set forth in the Share Purchase Agreement, including: (i) a one-time milestone payment of $12.5 million payable upon the first sale of Vicineum (the “Purchased Product”), in the United States; (ii) a one-time milestone payment of $7.0 million payable upon the first sale of the Purchased Product in any one of certain specified European countries; (iii) a one-time milestone payment of $3.0 million payable upon the first sale of the Purchased Product in Japan; and (iv) quarterly earn-out payments equal to 2% of net sales of the Purchased Product during specified earn-out periods. Such earn-out payments are payable with respect to net sales in a country beginning on the date of the first sale in such country and ending on the earlier of (i) December 31, 2033, and (ii) fifteen years after the date of such sale, subject to early termination in certain circumstances if a biosimilar product is on the market in the applicable country. Under the Share Purchase Agreement, the Company, its affiliates, licensees and subcontractors are required to use commercially reasonable efforts, for the first seven
years following the closing of the Viventia Acquisition, to achieve marketing authorizations throughout the world and, during the applicable earn-out period, to commercialize the Purchased Product in the United States, France, Germany, Italy, Spain, United Kingdom, Japan, China and Canada. Certain of these payments are payable to individuals or affiliates of individuals that became employees or members of the Company's board of directors. However, as of December 31, 2021, none of these individuals are active employees or members of the Company's board of directors.
Liquidity and Capital Resources
As of December 31, 2021, the Company had cash and cash equivalents of $162.6 million and an accumulated deficit of $316.3 million. The Company incurred negative cash flows from operating activities of $68.9 million, $30.8 million and $37.5 million for the years ended December 31, 2021, 2020 and 2019, respectively. Since the Company’s inception, it has received no revenue from sales of its products, and the Company anticipates that operating losses will continue for the foreseeable future as it seeks to address the issues raised in the CRL it received for a BLA for Vicineum for the treatment of BCG unresponsive NMIBC and the concerns identified in the EMA Withdrawal Assessment Report, complete the follow-up stage of the ongoing Phase 3 VISTA Trial of Vicineum for the treatment of BCG-unresponsive NMIBC, complete any additional clinical trials for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and seek marketing approval from the FDA and the European Commission and, if approved, commercialize Vicineum.The Company has financed its operations to date primarily through private placements of its common stock, and preferred stock, common stock warrants and convertible bridge notes, venture debt borrowings, its initial public offering ("IPO"), follow-on public offerings, sales effected in an "at-the-market" offering through its agent, Cowen("ATM") offerings, commercialization partnership and Company, LLC, andout-license agreements. See “Note 12. Stockholders’ Equity” below for information regarding the License Agreement. As of December 31, 2016,Company’s recently completed equity financings. Management believes that the Company hadCompany’s cash and cash equivalents totaling approximately $25.3 million, net working capitalas of $21.9 million and an accumulated deficit of $123.3 million.
In August 2014, FASB issued ASU 2014‑15, Presentation of Financial Statements-Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s AbilityDecember 31, 2021 will be sufficient to Continue as a Going Concern ("ASU 2015-14"). Underfund the new standard, management must evaluate whether there are conditions or events, considered inCompany's current operating plan for at least the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year afternext twelve months from the date that thethese consolidated financial statements arewere issued. This evaluation initially does not take into consideration the potential mitigating effect of management’s plans that have not been fully implemented as of the date the financial statements are issued. When substantial doubt exists, management evaluates whether the mitigating effect of its plans sufficiently alleviates substantial doubt about the Company’s ability to continue as a going concern. The mitigating effect of management’s plans, however, is only considered if both (1) it is probable that the plans will be effectively implemented within one year after the date that the financial statements are issued, and(2) it is probable that the plans, when implemented, will mitigate the relevant conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued. Generally, to be considered probable of being effectively implemented, the plans must have been approved by the Company’s board of directors ("Board") before the date that the financial statements are issued. This standard was adopted by the Company at December 31, 2016.
Funding Requirements
The Company’s future success of the Company is dependent on its ability to develop, and if approved, commercialize its product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and ultimately upon its ability to attain profitable operations. In order to commercialize its product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, the Company needs to complete clinical development and comply with comprehensive regulatory requirements. The Company is subject to a number of risks similar to other early-stage life sciencelate-stage clinical companies, including, but not limited to, successful discovery and development of its product candidates, raising additional capital, with favorable terms, development and commercialization by its competitors of new technological innovations, protection of proprietary technology and market acceptance of the Company’sits products. The successful discovery, development and, developmentif approved, commercialization of product candidates, including Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, requires substantial working capital, which may not be available toand the Company on favorable terms.
To date, the Company has no revenue from product sales and management expects continuing operating losses in the future. As of December 31, 2016, the Company had available cash and cash equivalents of $25.3 million, which it believes is not sufficient to fund the Company’s current operating plan through March 24, 2018, which is twelve months after the date the financial statements are issued. Management expects to seek additional funds through equity or debt financings or through additional collaborationoutside of United States (“OUS”) business development partnerships, collaborations, licensing transactions or licensing transactions.other sources. The Company may be unable to obtain equity or debt financings or enter into additional collaborationOUS business development partnerships, collaborations or licensing transactions at favorable terms, or at all, and, if necessary, the Company willmay be required to implement cost reduction strategies. These
The Company will incur substantial expenses if and as it:
addresses the issues identified in the CRL it received from the FDA for its BLA for Vicineum for the treatment of BCG-unresponsive NMIBC and the concerns identified in the European Medicines Agency’s (“EMA”) Withdrawal Assessment Report, which the Company expects will include the completion of an additional Phase 3 clinical trial;
seeks marketing approvals for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG;
establishes and implement sales, marketing and distribution capabilities and scale up and validate external manufacturing capabilities to commercialize Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved;
maintains, expands and protects its intellectual property portfolio;
hires additional clinical, regulatory, quality control, scientific and management personnel;
expands its operational, financial and management systems and personnel;
conducts research and pre-clinical and clinical development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, and its other product candidates;
seeks to discover and develop additional product candidates; and
in-licenses or acquires the rights to other products, product candidates or technologies.
The Company's future capital requirements will depend on many factors, raise substantial doubt about including:
the scope, initiation, progress, timing, costs and results of laboratory testing and clinical trials for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG and its other product candidates;
the ongoing COVID-19 pandemic and its impact on the Company’s business;
the Company’s ability to continueestablish additional OUS business development partnerships, collaborations or licensing arrangements on favorable terms, if at all, particularly manufacturing, marketing and distribution arrangements for its product candidates;
the costs and timing of the implementation of commercial-scale manufacturing activities, including those associated with the manufacturing process and technology transfer to third-party manufacturers to facilitate such commercial-scale manufacturing of Vicineum;
the costs and timing of establishing and implementing sales, marketing and distribution capabilities for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved;
the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing its intellectual property rights and defending any intellectual property-related claims;
the Company’s obligation to make milestone, royalty and other payments to third-party licensors under its licensing agreements;
the extent to which the Company in-licenses or acquires rights to other products, product candidates or technologies;
the outcome, timing and cost of regulatory review by the FDA, EMA and comparable non-US regulatory authorities for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, including the potential for the FDA, EMA or comparable non-US regulatory authorities to require that the Company perform more studies or clinical trials than those that it currently expects to perform;
the Company’s ability to achieve certain future regulatory, development and commercialization milestones under its out-license and OUS business development partnership agreements
the effect of competing technological and market developments; and
the revenue, if any, received from commercial sales of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, if approved.
Until such time, if ever, as the Company can generate substantial product revenues from commercial sales, the Company expects to finance its cash needs through a combination of equity offerings, debt financings, government or other third-party funding, strategic collaborations, OUS business development partnership agreements, partnerships, alliances, and licensing arrangements. The Company does not have any committed external source of funds other than the amounts payable under the license agreement with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (collectively, “Roche”) and the license agreement with Qilu Pharmaceutical, Co., Ltd. (“Qilu”). To the extent the Company raises additional capital through the sale of equity or convertible debt securities, the ownership interests of existing stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of existing stockholders. Debt financing, if available, may involve agreements that include liens or other restrictive covenants limiting the Company’s ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If the Company raises additional funds through government or other third-party funding, strategic OUS business development partnerships, collaborations, alliances or licensing arrangements, the Company may have to relinquish valuable rights to its technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to the Company. If the Company is unable to raise additional funds when needed, the Company may be required to delay, limit, reduce or terminate its product development or future commercialization efforts or grant rights to develop and market products or product candidates that the Company would otherwise prefer to develop and market itself.
The COVID-19 pandemic has negatively impacted the global economy, disrupted business operations and created significant volatility and disruption to financial markets. Significant uncertainty remains as to the potential impact of the COVID-19 pandemic on the Company’s operations, and on the global economy as a going concern.whole. The extent and duration of the pandemic could continue to disrupt global markets and may affect the Company’s ability to raise additional capital in the future.
2. BASIS OF PRESENTATION
The accompanying consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles ("GAAP"). Any reference in these notes to applicable guidance is meant to refer to GAAP as found in the ASC and Accounting Standards Updates ("ASUs"), promulgated by the Financial Accounting Standards Board ("FASB").
F-8


Use of Estimates
The preparation of financial statements in accordance with GAAP and the rules and regulations of the SEC requires the use of estimates and assumptions, based on a going concern basis,judgments considered reasonable, which contemplatesaffect the realizationreported amounts of assets and satisfactionliabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates and assumptions on historical experience, known trends and events and various other factors that management believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Although management believes its estimates and assumptions are reasonable when made, they are based upon information available at the time they are made. Management evaluates the estimates and assumptions on an ongoing basis and, if necessary, makes adjustments. Due to the risks and uncertainties involved in the ordinary courseCompany’s business and evolving market conditions, and given the subjective element of business.the estimates and assumptions made, actual results may differ from estimated results. The consolidated financial statements do not include any adjustments relating tomost significant estimates and judgments impact the recoverabilityfair value of intangible assets, goodwill and classification of recorded asset amounts orcontingent consideration; income taxes (including the amountsvaluation allowance for deferred tax assets); research and classification of liabilities that might result from the outcome of this uncertainty.development expenses; and going concern considerations.


ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

2. Significant Accounting Policies
Principles of Consolidation
These consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The Company’s consolidated financial statements include the accounts of Eleven Biotherapeutics, Inc.,the Company, its wholly owned subsidiary Viventia Bio Inc., and its indirect subsidiaries, Viventia Bio USA Inc. and Viventia Biotech (EU) Limited. All inter-companyintercompany transactions and balances have been eliminated in consolidation.

Foreign Currency Translation
The functional currency of Viventia Bio Inc., Viventia Bio USA Inc. and Viventia Biotech (EU) Limited is the U.S. dollar. Consolidated balance sheet accounts of the Company’s subsidiaries are translated into U.S. dollars using the exchange rate in effect at the consolidated balance sheet date while expenses are translated using the average exchange rate in effect during the period. Gains and losses arising from translation of the wholly owned subsidiaries’ financial statements are included in the determination of net income (loss).
Use of Estimates
The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Management considers many factors in selecting appropriate financial accounting policies and controls, and in developing the estimates and assumptions that are used in the preparation of these consolidated financial statements. Management must apply significant judgment in this process. In addition, other factors may affect estimates, including: expected business and operational changes, sensitivity and volatility associated with the assumptions used in developing estimates, and whether historical trends are expected to be representative of future trends. The estimation process often may yield a range of potentially reasonable estimates of the ultimate future outcomes and management must select an amount that falls within that range of reasonable estimates. This process may result in actual results differing materially from those estimated amounts used in the preparation of the consolidated financial statements. Estimates are used in the following areas, among others: stock-based compensation expense, fair value of warrants to purchase common stock, revenue recognition, fair value of intangible assets and goodwill, income taxes including the valuation allowance for deferred tax assets, accrued expenses, contingent consideration and going concern considerations. Actual results could differ from those estimates under different assumptions or conditions. Changes in estimates are reflected in reported results in the period in which they become known.
Revenue Recognition
The Company recognizes revenue in accordance with Accounting Standards Codification ("ASC") Topic 605, Revenue Recognition (“ASC 605”) and evaluates multiple-element arrangements based on the guidance in ASC Topic 605-25, Revenue Recognition-Multiple-Element Arrangements (“ASC 605-25”). Revenues from license arrangements are recognized when persuasive evidence of an arrangement exists, delivery of goods or services has occurred, including title to the product, and associated risk of loss has passed to the customer, the price is fixed or determinable, collection from the customer has been reasonably assured, all performance obligations have been met, and any associated reductions of revenue can be reasonably estimated. The Company licenses certain rights to its product candidates to third parties. Activities under licensing agreements are evaluated to determine if they represent a multiple element arrangement. The Company identifies the deliverables included within the agreement and evaluates which deliverables represent separate units of accounting. The Company accounts for those components as separate units of accounting if the following two criteria are met:
the delivered item or items have stand-alone value to the customer; and
delivery or performance of the undelivered item(s) is considered probable and substantially in the control of the Company and each of its subsidiaries is the arrangement includesUS dollar.
3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Cash, Cash Equivalents, Restricted Cash and Concentration of Credit Risk
The Company's cash is held on deposit in demand accounts at a general right of return relative to the delivered item(s).
Factors consideredlarge financial institution in this determination include, among other things, whether any other vendors sell the items separately and if the licensee could use the delivered item for its intended purpose without the receiptamounts in excess of the remaining deliverables. The consideration that is fixed or determinable is allocatedFederal Deposit Insurance Corporation ("FDIC") insurance coverage limit of $250,000 per depositor, per FDIC-insured bank, per ownership category. Restricted cash represents cash held by the Company's primary commercial bank to collateralize a letter of credit issued related to a license agreement and the separate units of accounting basedcredit limit on the relative selling prices of each deliverable. The consideration allocated to each unit of accounting is recognized as the related goodsCompany's corporate credit card, and services are delivered. The amount allocable to the delivered units of accounting is limited to the amount that is not contingent upon the delivery of additional items or meeting other specified performance conditions.

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

The Company determines the selling price on the basis of vendor-specific objective evidence ("VSOE"), third party evidence, or best estimate of selling price. VSOE is the price charged for a deliverable when it is sold separately. Third party evidence is the price that the Company or vendors charge for a similar deliverable when sold separately. Best estimate is the price at which the Company would sell the deliverable if the deliverable were sold by the Company regularly on a stand-alone basis.
When multiple deliverables are combined and accounted for as a single unit of accounting, the Company bases its revenue recognition on the last element to be delivered using the straight-line or proportional performance method depending on the Company’s ability to estimate the timing of the delivery of the performance obligation. Amounts received or recorded as receivable prior to satisfying the associated revenue recognition criteria are recorded as deferred revenue in the consolidated balance sheets. Amounts not expected to be recognized within one year following the balance sheet date are classified as non-current deferred revenue.
If a future milestone payment under a license agreement is contingent upon the achievement of a substantive milestone, license revenue is recognized in its entirety in the period in which the milestone is achieved. Non-substantive milestone payments that are paid based on the passage of time or as a result of the licensee’s performance are allocated to the units of accounting within the arrangementshort term and recognized as revenue when those deliverables are satisfied. A milestone is substantive if:
it can only be achieved based in whole or in part on either the Company’s performance or the occurrence of a specific outcome resulting from the Company’s performance;
there is substantive uncertainty at the date an arrangement is entered into that the event will be achieved; and
it would result in additional payments being due to the Company.
Options are considered substantive if, at the inception of the arrangement, the Company is at risk as to whether the licensee will choose to exercise the option. Factors that the Company considers in evaluating whether an option is substantive include the overall objective of the arrangement, the benefit the licensee might obtain from the arrangement without exercising the option, the cost to exercise the option and the likelihood that the option will be exercised. For arrangements under which an option is considered substantive, the Company does not consider the item underlying the option to be a deliverable at the inception of the arrangement and the associated option fees are not included in allocable arrangement consideration, assuming the option is not priced at a significant and incremental discount. Conversely, for arrangements under which an option is not considered substantive or if an option is priced at a significant and incremental discount, the Company would consider the item underlying the option to be a deliverable at the inception of the arrangement and a corresponding amount would be included in allocable arrangement consideration.
Commercial milestone and royalty payments received under license agreements are recognized as license revenue when they are earned.
Research and Development Costs
Expenditures relating to research and development are expensed in the period incurred. Research and development expenses consist of both internal and external costs associated with all basic research activities, clinical activities and technical effort required to develop a new product or service. The research and development costs include personnel-related costs, stock-based compensation, facilities, research-related overhead, pre-approval regulatory and clinical trial costs, manufacturing costs and other contracted services, license fees, and other external costs.
In certain circumstances, the Company is required to make advance payments to vendors for goods or services that will be received in the future for use in research and development activities. In such circumstances, the advance payments are deferred and are expensed when the activity has been performed or when the goods have been received.
Stock-Based Compensation
The Company accounts for its stock-based compensation awards in accordance with ASC Topic 718, Compensation—Stock Compensation (“ASC 718”). ASC 718 requires all stock-based payments to employees and directors, including grants of employee stock options, to be recognized as expense in the consolidated financial statements based on their grant date fair values. For stock options granted to employees and to members of the Board for their services on the Board, the Company estimates the grant date fair value of each option award using the Black-Scholes option-pricing model. The use of the Black-Scholes option-pricing model requires management to make assumptions with respect to the expectedlong term, of the option, the

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

expected volatility of the common stock consistent with the expected life of the option, risk-free interest rates and expected dividend yields of the common stock. For awards subject to service-based vesting conditions, the Company recognizes stock-based compensation expense, net of estimated forfeitures, equal to the grant date fair value of the stock options on a straight-line basis over the requisite service period. For awards subject to both performance and service-based vesting conditions, the Company recognizes stock-based compensation expense using an accelerated recognition method.
The Company expenses restricted stock awards and restricted stock units to employees and members of the Board based on the grant date fair value of the award on a straight-line basis over the associated service period of the award. Awards of restricted stock to non-employees are adjusted through stock-based compensation expense at each reporting period end to reflect the current fair value of such awards and expensed on a straight-line basis.
The Company records the expense for stock option grants subject to performance-based milestone vesting using the accelerated attribution method over the remaining service period when management determines that achievement of the milestone is probable. Management evaluates when the achievement of a performance-based milestone is probable based on the relative satisfaction of the performance conditions as of the reporting date.
Share-based payments issued to non-employees are recorded at their fair values, and are periodically revalued as the equity instruments vest and are recognized as expense over the related service period in accordance with the provisions of ASC 718 and ASC Topic 505-50, Equity-Based Payments to Non-Employees. For equity instruments granted to non-employees, the Company recognizes stock-based compensation expense on a straight-line basis.
During the years ended December 31, 2016, 2015 and 2014, the Company recorded stock-based compensation expense, which was allocated as follows in the consolidated statements of operations and comprehensive income (loss) (in thousands):
 Year Ended December 31,
 2016 2015 2014
Research and development expense$1,455
 $1,032
 $1,069
General and administrative expense2,558
 1,497
 1,363
 $4,013
 $2,529
 $2,432
No related tax benefits were recognized for the years ended December 31, 2016, 2015 and 2014.
Income Taxes
The Company provides for income taxes using the liability method. Under this method, deferred tax assets and liabilities are determined based on differences between the financial statement carrying amounts and the tax bases of the assets and liabilities using the enacted tax rates in effect in the years in which the differences are expected to reverse. A valuation allowance against deferred tax assets is recorded if, based on the weight of the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized.
The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740, Income Taxes. When uncertain tax positions exist, the Company recognizes the tax benefit of tax positions to the extent that the benefit will more likely than not be realized. The determination as to whether the tax benefit will more likely than not be realized is based upon the technical merits of the tax position as well as consideration of the available facts and circumstances. As of December 31, 2016 and 2015, the Company did not have any significant uncertain tax positions.
Comprehensive Income (Loss)
Comprehensive income (loss) is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. For the years ended December 31, 2016, 2015 and 2014, comprehensive income (loss) was equal to net income (loss).
Cash and Cash Equivalents
respectively. The Company considers all highly liquid investments purchased with aan original maturity of three months or less when purchased to be cash equivalents.

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Concentrations of Credit Risk and Off-Balance-Sheet Risk
The Company has no significant off-balance-sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements. Financial instruments that potentially exposesubject the Company to concentrations of credit risk primarily consistprincipally consists of cash equivalents and cash equivalents. Theaccounts receivable. As of December 31, 2021 and 2020, the Company placeslimited its cash andcredit risk associated with cash equivalents by placing investments in a custodian account in accredited financial institutions.
Fair Value of Financial Instruments
The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows: Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly; and Level 3 inputs are unobservable inputs that reflect the Company’s own assumptions about the assumptionshighly-rated money market participants would use in pricing the asset or liability. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.funds.
The following table presents information about the Company’s financial assets and liabilities that have been measured at fair value, and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value. The Company determines the fair value of the common stock warrants (See Note 11) and contingent consideration (See Note 3) using Level 3 inputs.
The following table summarizes the assets and liabilities measured at fair value on a recurring basis at December 31, 2016 (in thousands):
DescriptionDecember 31, 2016 
Active
Markets
(Level 1)
 
Observable
Inputs
(Level 2)
 
Unobservable
Inputs
(Level 3)
Assets:       
Cash and cash equivalents$25,342
 $25,342
 $
 $
Restricted cash10
 10
 
 
Total assets$25,352
 $25,352
 $
 $
Liabilities:       
Warrant liability$5
 $
 $
 $5
Contingent consideration45,100
 
 
 45,100
Total liabilities$45,105
 $
 $
 $45,105
The following table summarizes the assets and liabilities measured at fair value on a recurring basis at December 31, 2015 (in thousands):
DescriptionDecember 31, 2015 
Active
Markets
(Level 1)
 
Observable
Inputs
(Level 2)
 
Unobservable
Inputs
(Level 3)
Assets:       
Cash and cash equivalents$36,079
 $36,079
 $
 $
Restricted cash94
 94
 
 
Total assets$36,173
 $36,173
 $
 $
Liabilities:       
Warrant liability$115
 $
 $
 $115
Total liabilities$115
 $
 $
 $115
The carrying amounts reflected in the balance sheets for prepaid expenses and other current assets, other assets, accounts payable and accrued expenses approximate their fair values at December 31, 2016 and 2015, due to their short-term nature.

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

There have been no changes to the valuation methods used during the years ended December 31, 2016 and 2015. The Company evaluates transfers between levels at the end of each reporting period. There were no transfers of assets or liabilities between levels during the years ended December 31, 2016 and 2015.
Property and Equipment
Property and equipment consists of lab equipment, furniture and fixtures, computer equipment, software, and leasehold improvements. Expenditures for maintenanceare recorded at cost. Maintenance and repairs are recordedcharged to expense as incurred. Major bettermentsincurred, and costs of improvements and renewals are capitalized as additions to property and equipment.capitalized. Depreciation is calculatedrecognized using the straight-line method over the estimated useful lives of the assets using the straight-line method.
Business Combinations
relative assets. The Company evaluates acquisitionsuses an estimated useful life of five years for lab equipment, four years for furniture and fixtures, three years for computer equipment and software and the lesser of five years or the remaining lease term for leasehold improvements.
Indefinite-Lived Intangible Assets
The Company’s intangible assets consist of indefinite-lived, acquired in-process research and other similar transactionsdevelopment ("IPR&D") worldwide product rights to assess whether or not the transaction should be accounted forVicineum as a business combination by assessing whether or not the Company has acquired inputs and processes that have the ability to create outputs. If determined to be a business combination, the Company accounts for business acquisitions underresult of the acquisition method of accounting as indicatedViventia in the FASB issued ASC Topic 805, Business Combinations (“ASC 805”), which requires the acquiring entity2016. IPR&D assets acquired in a business combination are considered indefinite-lived until the completion or abandonment of the associated research and development efforts. Amortization over the estimated useful life will commence at the time of Vicineum's commercial launch in the respective markets, if approved. If regulatory approval to recognizemarket Vicineum for the treatment of BCG-unresponsive NMIBC is not obtained, the Company will immediately expense the related capitalized cost.
Indefinite-lived intangible assets are quantitatively tested for impairment at least annually during the fourth quarter of the fiscal year, or more often if indicators of impairment are present. Impairment testing of indefinite-lived intangible assets requires management to estimate the future discounted cash flows of an asset using assumptions believed to be reasonable, but which are unpredictable and inherently uncertain. Actual future cash flows may differ from the estimates used in impairment testing. The Company recognizes an impairment loss when and to the extent that the estimated fair value of all assets acquired and liabilities assumed and establishes the acquisition date as the fair value measurement point. Accordingly,an intangible asset is less than its carrying value. In addition, on a quarterly basis, the Company recognizes assets acquired and liabilities assumed inperforms a qualitative review of its business combinations, including contingent assets and liabilities, and non-controlling interest in the acquiree based on the fair value estimates as of the date of acquisition. In accordance with ASC 805, the Company recognizes and measures goodwill as of the acquisition date, as the excess of the fair value of the consideration paid over the fair value of the identified net assets acquired.
The consideration for the Company’s business acquisitions includes future payments that are contingent upon the occurrence of a particular event or events. The obligations for such contingent consideration payments are recorded at fair value on the acquisition date. The contingent consideration obligations are then evaluated each reporting period. Changes in the fair value of contingent consideration obligations, other than changes dueoperations to payments, are recognized as a gain or loss on fair value remeasurement of contingent consideration in the consolidated statements of operations and comprehensive income (loss).
Indefinite-Lived Intangible Assets
In accordance with ASC Topic 350, Intangibles — Goodwill and Other (“ASC 350”), during the period that an asset is considered indefinite-lived, such as in-process research and development (“IPR&D”), it will not be amortized. Acquired IPR&D represents the fair value assigned to research and development assets that have not reached technological feasibility. The value assigned to acquired IPR&D is determined by estimating the costs to develop the acquired technology into commercially viable products, estimating the resulting revenue from the projects, and discounting the net cash flows to present value. The revenue and costs projections used to value acquired IPR&D are, as applicable, reduced based on the probability of success of developing a new drug. Additionally, the projections consider the relevant market sizes and growth factors, expected trends in technology, and the nature and expected timing of new product introductions by the Company and its competitors. The rates utilized to discount the net cash flows to their present value are commensurate with the stage of development of the
projects and uncertainties in the economic estimates used in the projections. Upon the acquisition of IPR&D, the Company completes an assessment ofdetermine whether its acquisition constitutes the purchase of a single asset or a group of assets. Multiple factors are considered in this assessment, including the nature of the technology acquired, the presence or absence of separate cash flows, the development process and stage of completion, quantitative significance and the rationale for entering into the transaction. Indefinite-lived assets are maintained on the Company’s consolidated balance sheet until either the project underlying it is completed or the asset becomes impaired. Indefinite-lived assets are tested for impairment on an annual basis, or whenever events or changes in circumstances have occurred which could indicate that the reductioncarrying value of its intangible assets was not recoverable. If an impairment indicator is identified, an interim impairment assessment is performed.
F-9


In August 2021, the Company received a CRL from the FDA regarding its BLA for Vicineum for the treatment of NMIBC, its lead product candidate. In the CRL, the FDA determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality. Given the inherent uncertainty in the development plans for Vicineum (and Vysyneum in the EMA) as a result of the CRL and the withdrawal of the Company's marketing authorization application (“MAA”), an interim impairment analysis was conducted in the third quarter of 2021, which concluded that the carrying value of the Company’s intangible asset of Vicineum US rights was fully impaired as of September 30, 2021. The $31.7 million of impairment charges were due to delays in the expected start of commercialization and lower probabilities of success, combined with higher operating expenses expected to be incurred prior to commercialization, resulting in lower expected future cash flows estimated in the US market. However, while similar delays in timelines and reduced probabilities of success also affected the estimated fair value of the IPR&DCompany's intangible asset is below its respective carrying amount. If the Company determinesof Vicineum EU rights, this asset was not impaired as of September 30, 2021. At that an impairment has occurred, a write-down oftime, management assessed that the carrying value and anof the Vicineum EU rights is not at significant risk of impairment charge to operating expenses in the periodfuture within the determinationcurrent range of commercialization timelines and probability of clinical and regulatory success (“POS”) assumptions. This is made is recorded. When developmentprimarily due to the fact that the Company expects the Vicineum sales outside of an
IPR&Dthe US to be two to three times the expected sales volume in the US, based on management’s reassessment of the total addressable global market for high-risk NMIBC during the quarter ended June 30, 2019, wherein management determined that both the global market size and the estimated potential Vicineum commercial sales within the global market were likely higher than the Company's previous estimate. In addition, the EU asset is completeburdened with significantly less expense than the associatedUS asset, would be deemed finite-livedas the Company’s strategic operating plan is to sublicense Vicineum to business development partners in all regions outside the US, including the EU, with it earning a potential combination of upfront, milestone, and would then be amortized basedroyalty payments, and the business development partner bearing the majority of regulatory and commercialization costs. The Company participated in Type A Meetings with the FDA on October 29, 2021 and December 8, 2021 to discuss questions related to CMC and clinical issues raised in the CRL. Both meetings helped the Company determine the appropriate path forward for Vicineum. Based upon the outcome of these meetings, the Company plans to conduct an additional Phase 3 clinical trial. Also, during the Clinical Type A Meeting, the Company aligned with FDA to include patients with less than adequate BCG into its respective estimated useful life atnew clinical trial. The Company performed the annual impairment test, which incorporated the impact of the CRL and the subsequent Type A Meetings in the fourth quarter of 2021 and concluded that point.the carrying value of the Company's intangible asset of Vicineum EU rights was not impaired as of December 31, 2021.
The Company did not recognize any impairment charges during the year ended December 31, 2020.
Goodwill
Goodwill on the Company's consolidated balance sheets is the result of the Company’s acquisition of Viventia in September 2016 and represents the difference between the purchase price and the fair value of the identifiable tangible and intangible net

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

assets when accounted for usingacquired under the purchaseacquisition method of accounting. Goodwill is not amortized,amortized; rather than recording periodic amortization, goodwill is quantitatively tested for impairment at least annually during the fourth quarter of the fiscal year, or more often if indicators of impairment are present. Impairment testing of goodwill requires management to estimate the future discounted cash flows of a reporting unit using assumptions believed to be reasonable, but which are unpredictable and inherently uncertain. Actual future cash flows may differ from the estimates used in impairment testing. If the fair value of the equity of a reporting unit exceeds the reporting unit’s carrying value, including goodwill, then goodwill is reviewed for impairment.considered not to be impaired. The Company testsrecognizes a goodwill impairment when and to the extent that the fair value of the equity of a reporting unit is less than the reporting unit's carrying value, including goodwill. The Company has only 1 reporting unit. In addition, on a quarterly basis, the Company performs a qualitative review of its goodwill for impairment annually, or wheneverbusiness operations to determine whether events or changes in circumstances have occurred which could have a material adverse effect on the estimated fair value of each reporting unit and thus indicate a potential impairment of the goodwill carrying value. If an impairment may have occurred, by comparing its carrying value to its implied fair value in accordance with ASC 350. Impairment may result from, among other things, deteriorationindicator is identified, an interim impairment assessment is performed. Given the inherent uncertainty in the performancedevelopment plans for Vicineum as a result of the acquired asset, adverse market conditions, adverse changesCRL and the Company’s withdrawal of its MAA, an impairment analysis was conducted in applicable laws or regulations and a varietythe third quarter of other circumstances. If2021. While an impairment was recognized in one of the Company’s intangible assets, Vicineum US Rights, the Company determinesconcluded that an impairment has occurred, a write-down of the carrying value and an impairment charge to operating expenses in the period the determination is made is recorded. In evaluating the carrying value of its goodwill of $13.1 million was not impaired as of September 30, 2021.
In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the requirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of our a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. The Company performed the annual impairment test, which incorporated the impact of the CRL and the subsequent Type A Meetings in the fourth quarter of 2021 and concluded that there was no goodwill impairment as of December 31, 2021. Management believes the Company must make assumptions regarding estimatedhas sufficient future cash flows from additional geographic regions outside the US to support the value of its goodwill. The
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Company projects future cash flows based on various timeline assumptions and other factorsapplies a probability to determineeach outcome based on management’s best estimate. In addition, probabilities of success in achieving certain clinical and regulatory success can also have a material effect on the estimated fair value of the equity of its reporting unit as of the impairment assessment date. The Company will continue to evaluate timelines for commercialization and probability of success of development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
Based on the annual testing and quarterly reviews performed, the Company concluded that there was no goodwill impairment during the year ended December 31, 2020.
Contingent Consideration
The Company uses a discounted cash flow model to estimate the fair value of the acquired assets. Changescontingent consideration liability each reporting period, which represents the present value of projected future cash flows associated with regulatory approval milestones and royalties on net sales due to the selling shareholders of Viventia Bio Inc. as a result of the Viventia Acquisition in strategy orSeptember 2016. See "Note 1. Description of Business" for additional information. Contingent consideration is measured at its estimated fair value on a recurring basis at each reporting period, with fluctuations in value resulting in a non-cash charge to earnings (or loss) during the period. The estimated fair value measurement is based on significant unobservable inputs (Level 3 within the fair value hierarchy), including internally developed financial forecasts, probabilities of success and timing of certain milestone events and achievements, which are inherently uncertain. Actual future cash flows may differ from the assumptions used to estimate the fair value of contingent consideration. The valuation of contingent consideration requires the use of significant assumptions and judgments, which management believes are consistent with those that would be made by a market conditions could significantly impact thoseparticipant. Management reviews its assumptions and judgments on an ongoing basis as additional market and other data is obtained, and any future changes in the assumptions and judgments utilized by management may cause the estimated fair value of contingent consideration to fluctuate materially, resulting in earnings volatility.
In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the requirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of our a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. The Company reassessed the underlying assumptions used to develop the revenue projections upon which the fair value of its contingent consideration is based. The most significant and impactful assumptions in the Company's revenue projection models are timing of product launch and probabilities of clinical and regulatory success ("POS"); the Company expects delays in the start of commercialization and estimates lower POS as a direct result of the CRL. The Company plans to conduct an additional clinical trial, which will lead to delays in the start of commercialization globally. The Company has assessed a range of commercialization timeline assumptions and applied a probability to each outcome based on management’s best estimate. In addition, the Company now assumes a lower POS in achieving certain clinical and regulatory milestones in the range of approximately 45% to 55% globally. Any changes in these assumptions and estimates, or other information obtained, may have a significant impact on the remeasurement of the contingent consideration liability in the future. The fair value of the Company’s contingent consideration is determined based on the present value of projected future cash flows associated with sales-based milestones and requireearnouts on net sales and is heavily dependent on discount rates to estimate the fair value at each reporting period. Earnouts are determined using an adjustmentearnout rate of 2% on all commercial net sales of Vicineum through December 2033. The discount rate applied to the recorded balances.2% earnout is derived from the Company’s estimated weighted-average cost of capital (“WACC”), which has fluctuated from 8.8% as of December 31, 2020, to 7.8% as of March 31, 2021, 6.8% as of June 30, 2021, 8.6% as of September 30, 2021, and 9.3% as of December 31, 2021. Milestone payments constitute debt-like obligations, and therefore a high-yield debt index rate is applied to the milestones in order to determine the estimated fair value. This index rate changed from 8.4% as of December 31, 2020, to 7.4% as of March 31, 2021, 6.6% as of June 30, 2021, 7.5% as of September 30, 2021, and 8.0% as of December 31, 2021.
ImpairmentLeases
Effective January 1, 2019, the Company adopted ASC Topic 842, Leases (“ASC 842”) using the optional transition method outlined in ASU No. 2018-11, Leases (Topic 842), Targeted Improvements. The adoption of Long-Lived AssetsASC 842 represents a change in accounting principle that aims to increase transparency and comparability among organizations by requiring the recognition of right-of-use assets and lease liabilities on the balance sheet for both operating and finance leases. In addition, the standard requires enhanced disclosures that meet the objective of enabling financial statement users to assess the amount, timing and uncertainty of cash flows arising from leases. The reported results for the year ended December 31, 2021, 2020 and 2019 reflect the application of ASC 842 guidance, while the reported results for priors were prepared in accordance with the previous ASC Topic 840, Leases ("ASC 840") guidance. The adoption of ASC 842 resulted in the recognition of operating lease right-of-use assets and corresponding lease liabilities of $0.2 million on the Company’s consolidated balance sheet as of January 1, 2019.
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The adoption of this guidance did not have a material impact on the Company’s financial condition, results of operations or cash flows; however, the adoption did result in significant changes to the Company’s financial statement disclosures.
As part of the adoption of ASC 842, the Company periodically evaluates its long-lived assetsutilized certain practical expedients outlined in the guidance. These practical expedients include:
Accounting policy election to use the short-term lease exception by asset class;
Election of the practical expedient package during transition, which includes:
-    An entity need not reassess whether any expired or existing contracts are or contain leases;
-    An entity need not reassess the classification for potential impairmentany expired or existing leases. As a result, all leases that were classified as operating leases in accordance with ASC Topic 360, Property, Plant840 are classified as operating leases under ASC 842, and Equipment. Potential impairmentall leases that were classified as capital leases in accordance with ASC 840 are classified as finance leases under ASC 842; and
-    An entity need not reassess initial direct costs for any existing leases.
The Company’s lease portfolio as of the adoption date and as of December 31, 2021 includes: a property lease for manufacturing, laboratory, warehouse and office space in Winnipeg, Manitoba, a property lease for its headquarters in Cambridge, MA, and a property lease for office space in Philadelphia, PA. The Company determines if an arrangement is assessed when there is evidence that events or changesa lease at the inception of the contract and has made a policy election to not separate out non-lease components from lease components, for all classes of underlying assets. The asset components of the Company’s operating leases are recorded as operating lease right-of-use assets and reported within other assets on the Company's consolidated balance sheet. The short-term and long-term liability components are recorded in circumstances indicate thatother current liabilities and other liabilities, respectively, on the carrying amountCompany’s consolidated balance sheet. As of an asset mayDecember 31, 2021, the Company did not be recovered. Recoverability of thesehave any finance leases.
Right-of-use assets is assessedand operating lease liabilities are recognized based on undiscounted expected future cash flows from the assets, considering a numberpresent value of factors, including past operating results, budgets and economic projections, market trends and product development cycles. If impairments are identified,lease payments over the lease term at the commencement date. Existing leases in the Company’s lease portfolio as of the adoption date were valued as of January 1, 2019. The Company uses an incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments, if an implicit rate of return is not provided with the lease contract. Operating lease right-of-use assets are written downadjusted for incentives received.
Operating lease costs are recognized on a straight-line basis over the lease term, in accordance with ASC 842, and also include variable operating costs incurred during the period. Lease costs also include amounts related to their estimatedshort-term leases.
Research and Development Costs
Research and development activities are expensed in the period incurred. Research and development expenses consist of both internal and external costs associated with all basic research activities, clinical development activities and technical efforts required to develop a product candidate. Internal research and development consist primarily of personnel costs, including salaries, benefits and share-based compensation, facilities leases, research-related overhead, pre-approval regulatory and clinical trial costs, manufacturing and other contracted services, license fees and other external costs.
In certain circumstances, the Company is required to make advance payments to vendors for goods or services that will be received in the future for use in research and development activities. In such circumstances, the advance payments are recorded as prepaid assets and expensed when the activity has been performed or when the goods have been received.
Share-Based Compensation
The Company recognizes the grant-date fair value. Thevalue of share-based awards granted as compensation as expense on a straight-line basis over the requisite service period, which is generally the vesting period of the award. To date, the Company has not issued awards where vesting is subject to market conditions. From time to time, the Company has granted to its executives' stock option awards which contain both performance-based and service-based vesting criteria. Performance milestone events are specific to the Company’s corporate goals, including certain clinical development objectives related to the new clinical trial, regulatory and financial objectives. Share-based compensation expense associated with performance-based vesting criteria is recognized any impairment charges throughusing the accelerated attribution method if the performance condition is considered probable of achievement in management’s judgment. The fair value of stock options is estimated at the time of grant using the Black-Scholes option pricing model, which requires the use of inputs and assumptions such as the fair value of the underlying stock, exercise price of the option, expected term, risk-free interest rate, expected volatility and dividend yield.
The fair value of each grant of options during the years ended December 31, 2016.2021, 2020 and 2019 was determined using the following methods and assumptions:
Warrant LiabilityExpected Term.Due to the lack of historical exercise data and given the plain vanilla nature of the options granted by the Company, the expected term is determined using the “simplified" method, as prescribed in SEC Staff Accounting Bulletin ("SAB") No. 107 ("SAB 107"), whereby the expected life equals the arithmetic average of the vesting term
F-12


(generally four years) and the original contractual term (ten years) of the option, taking into consideration multiple vesting tranches.
Risk-Free Interest Rate.The risk-free rate is based on the interest rate payable on United States Treasury securities in effect at the time of grant for a period that is commensurate with the assumed expected term.
Expected Volatility.The expected volatility is based on historical volatilities of a representative group of publicly traded biopharmaceutical companies, including the Company's own volatility, which were commensurate with the assumed expected term, as prescribed in SAB 107.
Dividend Yield. The dividend yield is 0% because the Company has never declared or paid, and for the foreseeable future does not expect to declare or pay, a dividend on its common stock.
Income Taxes
Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and net operating loss ("NOL") and research and development credit ("R&D credit") carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period that includes the enactment date. A valuation allowance is recorded to the extent it is more likely than not that some portion or all of the deferred tax assets will not be realized.
Unrecognized income tax benefits represent income tax positions taken on income tax returns that have not been recognized in the financial statements. The Company recognizes the benefit of an income tax position only if it is more likely than not (greater than 50%) that the tax position will be sustained upon tax examination, based solely on the technical merits of the tax position. Otherwise, no benefit is recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. The Company recognizes accrued interest and penalties related to uncertain tax positions as income tax expense in its consolidated statements of operations. As of December 31, 2021 and 2020, the Company did not have any uncertain tax positions.
Revenue Recognition
The Company accounts for warrant instruments that either conditionally or unconditionally obligaterecords revenue from out-license agreements and OUS business development partnership agreements, including the issuerLicense Agreement with Roche and its OUS partnerships. Under each of these agreements, the Company granted the counterparty an exclusive license to transfer assetsdevelop and commercialize the underlying licensed product. These agreements contain up-front license fees, development and regulatory milestone payments, sales-based milestone payments, and sales-based royalty payments.
The Company determines whether the out-license agreements and OUS business development partnership agreements are in scope of ASC 606, which it adopted as liabilities regardlessof January 1, 2018. Under ASC 606, in determining the appropriate amount of revenue to be recognized as the Company fulfills its obligations under these agreements, management performs the following steps:
1) Identification of the timingcontract;
2) Determination of whether the promised goods or services are performance obligations including whether they are distinct in the context of the redemption featurecontract;
3) Measurement of the transaction price, including the constraint on variable consideration;
4) Allocation of the transaction price to the performance obligations; and
5) Recognition of revenue when or as the Company satisfies each performance obligation.
Development and Regulatory Milestones and Other Payments
At the inception of an arrangement that includes development milestone payments, management evaluates whether the development milestones are considered probable of being reached and estimate the amount to be included in the transaction price even thoughusing the underlying shares maymost likely amount method. If it is probable that a significant revenue reversal would not occur, the associated development milestone value is included in the transaction price. Development milestone payments that are not within the Company's control or the licensee's control, such as regulatory approvals, are not considered probable of being achieved until those approvals are received. For payments pursuant to sales milestones and royalty payments, the Company will not recognize revenue until the subsequent sale of a licensed product occurs. For arrangements with one than one performance obligations, the milestones are generally allocated entirely to the license performance obligation, as (1) the terms of milestone and royalty payments relate specifically to the license and (2) allocating milestones and royalties to the license performance obligation is consistent with the overall allocation objective, because management’s estimate of milestones and royalties approximates the standalone selling price of the license.
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In December 2021, a $20 million milestone was achieved due to Roche initiating a Phase II clinical trial. The Company invoiced Roche $20 million with payment terms of 30 days following the achievement of the corresponding milestone event, pursuant to the Roche License Agreement. Management evaluated the transaction under ASC 606 and determined it is probable that a significant revenue reversal will not occur in future periods, which was not the case in the previous quarter. Accordingly, the Company recorded $20 million as license revenue and accounts receivables in the fourth quarter of 2021. In January 2022, the payment of $20 million was received.
The Company recognized $26.5 million of license revenue related to the Roche, Qilu and MENA License Agreements during the year ended December 31, 2021 and $11.2 million of license revenue related to the Qilu License Agreement during the year ended December 31, 2020.
4. RECENT ACCOUNTING PRONOUNCEMENTS
Adopted in 2021
In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes ("ASU 2019-12"). ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments in ASU 2019-12 also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption is permitted. The method with which the amendments in this ASU are to be classifiedapplied varies depending on the nature of the tax item impacted by amendment. The Company adopted this guidance effective January 1, 2021, and it did not have a material impact on its financial position, results of operations or cash flows.
5. FAIR VALUE MEASUREMENT AND FINANCIAL INSTRUMENTS
The carrying values of cash and cash equivalents, restricted cash, prepaid expenses and other current assets, and accounts payable on the Company’s consolidated balance sheets approximated their fair values as permanent or temporary equity. These warrantsof December 31, 2021 and 2020 due to their short-term nature.
Certain of the Company’s financial instruments are subjectmeasured at fair value using a three-level hierarchy that prioritizes the inputs used to revaluation at each balance sheet date,measure fair value. This fair value hierarchy prioritizes the use of observable inputs and any changes inminimizes the use of unobservable inputs. The three levels of inputs used to measure fair value are recorded as follows:
Level 1:    Inputs are quoted prices for identical instruments in active markets,
Level 2:    Inputs are quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; or model-derived valuations whose inputs are observable or whose significant value drivers are observable.
Level 3:    Inputs are unobservable and reflect the Company’s own assumptions, based on the best information available, including the Company’s own data.
The following tables set forth the carrying amounts and fair values of the Company's financial instruments measured at fair value on a componentrecurring basis as of December 31, 2021 and 2020 (in thousands):
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December 31, 2021
Fair Value Measurement Based on
Carrying AmountFair ValueQuoted Prices in Active
Markets
(Level 1)
Significant Other Observable
Inputs
(Level 2)
Significant Unobservable
Inputs
(Level 3)
Assets:
Money market funds
(cash equivalents)
$16,382 $16,382 $16,382 $— $— 
Liabilities:
Contingent consideration - short term— $— $— $— $— 
Contingent consideration - long term$52,000 $52,000 $— $— $52,000 
December 31, 2020
Fair Value Measurement Based on
Carrying AmountFair ValueQuoted Prices in Active
Markets
(Level 1)
Significant Other Observable
Inputs
(Level 2)
Significant Unobservable
Inputs
(Level 3)
Assets:
Money market funds
(cash equivalents)
$16,374 $16,374 $16,374 $— $— 
Liabilities:
Contingent consideration, current portion8,985 $8,985 $— $— $8,985 
Contingent consideration, net of current portion$99,855 $99,855 $— $— $99,855 
The Company evaluates transfers between fair value levels at the end of each reporting period. There were no transfers of assets or liabilities between fair value levels during the year ended December 31, 2021.
Contingent Consideration
The estimated fair value of the Company’s contingent consideration was determined using probabilities of successful achievement of regulatory milestones and commercial sales, the period in which these milestones and sales are expected to be achieved ranging from 2025 to 2033, the level of commercial sales of Vicineum forecasted for the US, Europe, Japan, China and other income (expense), untilpotential markets and discount rates ranging from 8.0% to 9.3% as of December 31, 2021 and 8.4% to 8.8% as of December 31, 2020. There have been no changes to the earlier of their exercise or expiration or uponvaluation methods utilized during the completion of a liquidation event. year ended December 31, 2021.
The following table sets forth a summary of changes in the fair valueby quarter of the Company’s common stock warrant liability, which represented a recurring measurement classified within Level 3 of the fair value hierarchy, wherein fair value was estimated using significant unobservable inputs (in thousands):
Beginning balance, January 1, 2016$115
Change in fair value of common stock warrants included in other income (expense)(110)
Ending balance, December 31, 2016$5
Contingent Consideration
In connection with the acquisition of Viventia Bio Inc., the Company recorded contingent consideration pertaining to the amounts potentially payable to Viventia Bio Inc.'s Selling Shareholders pursuant to the Share Purchase Agreement (See Note 3). Contingent consideration is measured at fair value and is based on significant inputs not observable in the market, which represents a Level 3 measurement within the fair value hierarchy. The valuation of contingent consideration uses assumptions the Company believes would be made by a market participant. The Company assesses these estimates on an on-going basis as additional data impacting the assumptions is obtained. Future changes in the fair value of contingent consideration related to updated assumptions and estimates are recognized within the consolidated statements of operations and comprehensive income (loss).
Contingent consideration may change significantly as development progresses and additional data are obtained, impacting the Company’s assumptions regarding probabilities of successful achievement of related milestones used to estimate the fair value of the liability and the timing in which they are expected to be achieved. In evaluating the fair value information, considerable judgment is required to interpret the market data used to develop the estimates. The estimates of fair value may not be indicative of the amounts that could be realized in a current market exchange. Accordingly, the use of different market assumptions and/or different valuation techniques could result in materially different fair value estimates. The following table sets forth a summary of changes in the fair value of the Company's contingent consideration liability, which representedmeasured on a recurring measurement classified within Level 3 ofbasis at each reporting period, for the fair value hierarchy, wherein fair value was estimated using significant unobservable inputsyear ended December 31, 2021 (in thousands):

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ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Beginning balance, January 1, 2016$
Contingent consideration resulting from acquisition of Viventia Bio Inc. as of acquisition date46,200
Change in fair value of contingent consideration(1,100)
Ending balance, December 31, 2016$45,100
Segment Information
Operating segments are identified as components of an enterprise for which separate discrete financial information is available for evaluation by the chief operating decision maker, or decision making group, in making decisions on how to allocate resources and assess performance. The Company views its operations and manages its business in one operating segment. The Company operates in one geographic segment. At December 31, 2016, long-lived assets of $0.8 million, comprised of property and equipment, are all held in Canada.
Subsequent Events
The Company considers events or transactions that occur after the balance sheet date, but prior to the issuance of the consolidated financial statements, to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated through the date these consolidated financial statements were issued.
Net Income (Loss) Per Share
Basic net income (loss) per share is calculated by dividing net income (loss) by the weighted-average shares outstanding during the period, without consideration for common stock equivalents. Diluted net income (loss) per share is calculated by adjusting weighted-average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period, determined using the treasury-stock method. For purposes of the diluted net income (loss) per share calculation, stock options, unvested restricted stock, restricted stock units and warrants are considered to be common stock equivalents.
Balance at December 31, 2020$108,840 
Change in fair value included in loss48,160 
Balance at March 31, 2021157,000 
Change in fair value included in loss13,600 
Balance at June 30, 2021170,600 
Change in fair value included in loss(114,000)
Balance at September 30, 202156,600 
Change in fair value included in loss(4,600)
Balance at December 31, 2021$52,000
Balance at December 31, 2021, current portion$— 
Balance at December 31, 2021, net of current portion$52,000 
The following common stock equivalents, using the treasury-stock method, were included in the calculation of diluted net income (loss) per share for the periods indicated.
 Year ended December 31,
 2016 2015 2014
Stock options650,109
 
 
Unvested restricted stock
 
 
Restricted stock units
 
 
Common stock warrants
 
 
 650,109
 


The following common stock equivalents were excluded from the calculation of diluted net income (loss) per share for the periods indicated because including them would have had an anti-dilutive effect or the exercise prices were greater than the average market pricetable sets forth a summary of the common shares.
 Year ended December 31,
 2016 2015 2014
Stock options1,374,359
 1,803,574
 1,438,528
Unvested restricted stock22,150
 41,657
 125,027
Restricted stock units3,333
 150,932
 
Common stock warrants926,840
 926,840
 899,340
 2,326,682
 2,923,003

2,462,895
Recent Accounting Pronouncements

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

In the second quarter of 2014, the FASB issued guidance applicable to revenue recognition that will be effective for the Company for the year ending December 31, 2018. The new guidance must be adopted using either a full retrospective approach for all periods presented or a modified retrospective approach. Earlier application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. The new guidance applies a more principles-based approach to recognizing revenue. The Company expects to adopt this new guidancechange in the first quarter of 2018 using the modified retrospective method. The adoption may have a material effect on the Company's financial statements. The Company's revenues are derived primarily from license and collaboration agreements. The consideration the Company is eligible to receive under these agreements includes upfront payments, research and development funding, milestone payments, and royalties. Each collaboration agreement is unique and will need to be assessed separately under the five-step process under the new standard. The new guidance differs from the current accounting standard in many respects, such as in the accounting for variable consideration, including milestone payments. Under the current accounting policy, the Company recognizes milestone revenue using the milestone method specified in ASC 605-28, which generally results in the recognition of the milestone payment as revenue in the period that the milestone is achieved. However, under the new accounting standard, it is possible to start to recognize milestone revenue before the milestone is achieved, subject to management's assessment of whether it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved.
In November 2015, the FASB issued Accounting Standards Update No. 2015-17, Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”). ASU 2015-17 requires companies to classify all deferred tax assets and liabilities as noncurrent on the balance sheet instead of separating deferred taxes into current and noncurrent amounts. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early adoption is permitted. The guidance may be adopted on either a prospective or retrospective basis. The Company does not expect the adoption of this guidance to have a material effect on the Company’s consolidated financial statements.
In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU 2016-02 addresses the financial reporting of leasing transactions. Under current guidance for lessees, leases are only included on the balance sheet if certain criteria, classifying the agreement as a capital lease, are met. This update will require the recognition of a right-of-use asset and a corresponding lease liability, discounted to the present value, for all leases that extend beyond 12 months. For operating leases, the asset and liability will be expensed over the lease term on a straight-line basis, with all cash flows included in the operating section of the statement of cash flows. For finance leases, interest on the lease liability will be recognized separately from the amortization of the right-of-use asset in the statement of operations and the repayment of the principal portion of the lease liability will be classified as a financing activity while the interest component will be included in the operating section of the statement of cash flows. This guidance is effective for annual and interim reporting periods beginning after December 15, 2018. Early adoption is permitted. The Company has not yet completed the analysis of how adopting this guidance will affect its consolidated financial statements.
In March 2016, the FASB issued Accounting Standards Update No. 2016-09, Improvements to Employee Share-Based Payment Accounting ("ASU 2016-09"). ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Some of the areas of simplification apply only to nonpublic entities. For public business entities, the amendments in ASU 2016-09 are effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. The Company has not yet completed the analysis of how adopting this guidance will affect its consolidated financial statements.

In August, 2016, the FASB issued Accounting Standards Update No. 2016-15, Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force) (“ASU 2016-15”). The amendments in ASU 2016-15 address eight specific cash flow issues and apply to all entities that are required to present a statement of cash flows under ASC Topic 230, Statement of Cash Flows. The amendments in ASU 2016-15 are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption during an interim period. The Company has not yet completed the analysis of how adopting this guidance will affect its consolidated financial statements.

In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Restricted Cash (a consensus of the FASB Emerging Issue Task Force) (“ASU 2016-18”). This new standard addresses the diversity that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. The amendments in ASU 2016-18 require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within the year of adoption, with early adoption permitted. The Company does not expect that the adoption of ASU 2016-18 will have a material impact on its consolidated financial statements.

In January 2017, the FASB issued Accounting Standards Update No. 2017-01, Clarifying the Definition of a Business ("ASU 2017-01"). The standard clarifies the definition of a business by adding guidance to assist entities in evaluating whether transactions should be accounted for as acquisitions of assets or businesses. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Under ASU 2017-01, to be considered a business, the assets in the transaction need to include an input and a substantive process that together significantly contribute to the ability to create outputs. Prior to the adoption of the new guidance, an acquisition or disposition would be considered a business if there were inputs, as well as processes that when applied to those inputs had the ability to create outputs. Early adoption is permitted for certain transactions. Adoption of ASU 2017-01 may have a material impact on the Company's consolidated financial statements if it enters into future business combinations.
In January 2017, the FASB issued Accounting Standards Update No. 2017-04, Simplifying the Test for Goodwill Impairment ("ASU 2017-04"). ASU 2017-04 simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. ASU 2017-04 is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019, and should be applied on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not anticipate the adoption of ASU 2017-04 will have a material impact on its consolidated financial statements.
3. Business Combination
On September 20, 2016, the Company entered into an agreement with Viventia Bio Inc., a corporation incorporated under the laws of the Province of Ontario, Canada (“Viventia”), the shareholders of Viventia named therein (the “Selling Shareholders”) and, solely in its capacity as seller representative, Clairmark Investments Ltd., a corporation incorporated under the laws of the Province of Ontario, Canada (“Clairmark”) (the “Share Purchase Agreement”), pursuant to which the Company agreed to and simultaneously completed the acquisition of all of the outstanding capital stock of Viventia from the Selling Shareholders (the “Acquisition”). In connection with the closing of the Acquisition, the Company issued 4,013,431 shares of its common stock to the Selling Shareholders, which represented approximately 19.9% of the voting power of the Company as of immediately prior to the issuance of such shares of the Company's common stock. The Selling Shareholders includes Clairmark, an affiliate of one of the Company’s directors, and the Company’s CEO.
In addition, under the Share Purchase Agreement, the Company is obligated to pay to the Selling Shareholders certain post-closing contingent cash payments upon the achievement of specified milestones and based upon net sales, in each case subject to the terms and conditions set forth in the Share Purchase Agreement, including: (i) a one-time milestone payment of $12.5 million payable upon the first sale of ViciniumTM or any variant or derivative thereof, other than ProxiniumTM (the “Purchased Product”), in the United States; (ii) a one-time milestone payment of $7.0 million payable upon the first sale of the Purchased Product in any one of certain specified European countries; (iii) a one-time milestone payment of $3.0 million payable upon the first sale of the Purchased Product in Japan; and (iv) and quarterly earn-out payments equal to two percent (2%) of net sales of the Purchased Product during specified earn-out periods. Such earn-out payments are payable with respect to net sales in a country beginning on the date of the first sale in such country and ending on the earlier of (i) December 31, 2033 and (ii) fifteen years after the date of such sale, subject to early termination in certain circumstances if a biosimilar product is on the market in the applicable country (collectively, the "Contingent Consideration"). Under the Share Purchase Agreement, the Company, its affiliates, licensees and subcontractors are required to use commercially reasonable efforts, for the first seven years following the closing of the Acquisition, to achieve marketing authorizations throughout the world and, during the applicable earn-out period, to commercialize the Purchased Product in the United States, France, Germany, Italy, Spain, United Kingdom, Japan, China and Canada. Certain of these payments are payable to individuals or affiliates of individuals that became employees or members of the Company's Board.
Each of the Company, Viventia and the Selling Shareholders has agreed to customary representations, warranties and covenants in the Share Purchase Agreement. The Share Purchase Agreement also includes indemnification obligations in favor of the Company from the Selling Shareholders, including for breaches of representations, warranties, covenants and agreements made

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

by Viventia and the Selling Shareholders in the Share Purchase Agreement. In connection with the closing of the Acquisition, the Company deposited 401,343 shares of its common stock (representing approximately 10% of the Company's common stock portion of the aggregate closing consideration owed to the Selling Shareholders pursuant to the Share Purchase Agreement) into an escrow fund for the purposes of securing the indemnification obligations of the Selling Shareholders to the Company for any and all losses for which the Company is entitled to indemnification pursuant to the Share Purchase Agreement. The Share Purchase Agreement also includes indemnification obligations in favor of the Selling Shareholders from the Company, including for breaches of representations, warranties, covenants and agreements made by the Company in the Share Purchase Agreement.
The Company concluded that the transaction included inputs and processes that have the ability to create outputs and accordingly accounted for the transaction as a business combination in accordance with ASC 805. As such, the assets acquired and liabilities assumed were recorded at fair value, with the remaining purchase price recorded as goodwill.
The purchase price consisted of the issuance of the 4,013,431 shares of the Company's common stock to the Selling Shareholders and the fair value of the Contingent Consideration.Company's total contingent consideration liability, measured on a recurring basis at each reporting period, for the year ended December 31, 2021.
Balance at December 31, 2020$108,840
Change in fair value of contingent consideration - short term(8,985)
Change in fair value of contingent consideration - long term(47,855)
Balance at December 31, 2021$52,000
The Company valuedfair value of the shares issued at $13.5 million,Company’s contingent consideration is determined based on the closing pricepresent value of the Company's common stockprojected future cash flows associated with sales-based milestones and earnouts on September 20, 2016 (the “Acquisition Date”). The Contingent Consideration was preliminarily valued at $46.2 million, using a probability-adjusted, discounted cash flownet sales and is heavily dependent on discount rates to estimate as of the Acquisition Date. The total fair value at each reporting period. Earnouts are determined using an earnout rate of consideration for the acquisition was $59.7 million.
As2% on all commercial net sales of Vicineum through December 31, 2016, purchase accounting for the Acquisition is preliminary and subject to completion upon obtaining the necessary remaining information, which principally includes information with respect2033. The discount rate applied to the market for Vicinium outside2% earnout is derived from the U.S. The Company is in the process of obtaining this information and will update the valuation for the changes as the information is obtained. Changes to these assumptions could cause an impact to (1) the valuation of the Contingent Consideration, (2) the identification and valuation of assets acquired, including intangible assets and related goodwill and (3) the related tax impacts of the Acquisition. The CompanyCompany’s WACC, which has preliminarily valued the acquired assets and liabilities based on their estimated fair value. The preliminary fair values included in the consolidated balance sheetfluctuated from 8.8% as of December 31, 2016 are based on the best estimates2020, to 7.8% as of the Company. Any adjustmentsMarch 31, 2021, 6.8% as of June 30, 2021, 8.6% as of September 30, 2021, and 9.3% as of December 31, 2021. Milestone payments constitute debt-like obligations, and therefore a high-yield debt index rate is applied to the preliminarymilestones in order to determine the estimated fair values will be made as such information becomes available, but no later than September 19, 2017. The following table presents the preliminary allocation of the purchase price for the transactionvalue. This index rate changed from 8.4% as of the Acquisition Date (in thousands):
Cash and cash equivalents $136
Prepaid expenses and other assets 1,162
Property and equipment 867
In-process research and development - U.S. Vicinium 12,200
In-process research and development - E.U. Vicinium 41,100
In-process research and development - R.O.W. Vicinium 7,200
Goodwill 16,864
Accounts payable (1,163)
Accrued expenses (1,494)
Other liabilities (812)
Deferred tax liability (16,335)
  $59,725

The preliminary allocation of the purchase consideration presented in the preceding table has been updated from the preliminary allocation of the purchase consideration presented in the Company’s Form 10-QDecember 31, 2020, to 7.4% as of and for the three- and nine-month periods endedMarch 31, 2021, 6.6% as of June 30, 2021, 7.5% as of September 30, 2016, to reflect new information related to facts2021, and circumstances existing8.0% as of the Acquisition Date, which impacted the determination ofDecember 31, 2021. The decrease in the fair value of contingent consideration of $56.8 million for the IPR&D assetsyear ended December 31, 2021 was driven by the receipt of the CRL from the FDA, in which the FDA determined that it could not approve the BLA for ViciniumVicineum in its present form, and Proxinium,the Company’s withdrawal of its MAA with EMA. In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the requirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of our a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. Incorporating the impact of the CRL and the subsequent Type A Meetings in the fourth quarter of 2021, the Company reassessed the underlying assumptions used to develop the revenue projections upon which the fair value of its contingent consideration is based. The most significant and impactful assumptions in the Contingent Consideration,Company’s revenue projection models are timing of commercial product launch and probabilities of clinical and regulatory success; the related deferred taxCompany expects delays in the start of commercialization and estimates lower POS as a direct result of the CRL and the Company’s withdrawal of its MAA. The Company plans to conduct an additional Phase 3 clinical trial in order to resubmit a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG, which will lead to delays in the start of commercialization globally. The Company has assessed a commercialization timeline assumption and applied a probability to each outcome based on management’s best estimate. In addition, the Company now assumes a lower POS in achieving certain clinical and regulatory milestones in the range of approximately 45% to 55% globally. Any changes in these assumptions and estimates as a result of these meetings, or other information obtained, may have a significant impact on the remeasurement of the contingent consideration liability in the future.
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6. RECEIVABLES
The accounts receivable balance as of December 31, 2021 is $21.0 million, comprised primarily of a $20 million milestone achieved in December 2021 due to Roche initiating a Phase II clinical trial. The Company invoiced Roche $20 million with payment terms of 30 days following the achievement of the corresponding milestone event, pursuant to the Roche License Agreement. In January 2022 the payment of $20 million was received. Additionally, in June 2021, the Qilu License Agreement was recognized by Shandong Province, Bureau of Science and goodwill. DuringTechnology as a "Technology Transfer". As such, the Company recorded $0.9 million of revenue and accounts receivable for the additional purchase price resulting from Qilu's obligation to pay Sesen an amount equal to its recovery of VAT. The Company will not be subject to VAT on future potential milestone payments from Qilu.
The other receivable balance as of December 31, 2021 is $3.5 million. The Company recorded $3.4 million to other receivables in the fourth quarter of 2016,2021 for German VAT recovery related to drug substance sent to Baxter. The Company received a payment for $1.8 million in January 2022 and expects to collect the Company gathered additional information around the market for Vicinium outside of the U.S., which enabled the Company to update the fair value of the IPR&D - Vicinium asset, the Contingent Consideration, the related deferred tax liabilityremaining balance.
The accounts receivable and goodwill. In addition, the Company increased the discount rate applied to determine the fair value the IPR&D assets to reflect

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

the increased risk associated with international markets. The previously reported fair values and the currently reported fair valuesother receivable balances as of the Acquisition Date, including Contingent Consideration, are reflected in theDecember 31, 2020 were de minims.
7. PROPERTY AND EQUIPMENT
The following table sets forth the composition of property and equipment, net as of December 31, 2021 and 2020 (in thousands):
December 31,
20212020
Lab equipment$569 $570 
Furniture and fixtures16 16 
Computer equipment99 97 
Software32 28 
Leasehold improvements293 293 
     Property and equipment, gross1,009 1,004 
     Less: accumulated depreciation(966)(881)
          Total Property and Equipment, Net$43 $123 
Depreciation expense was $0.1 million, $0.1 million and $0.2 million for the years ended December 31, 2021, 2020 and 2019, respectively.
8. INTANGIBLES AND GOODWILL
  Previously Reported Currently Reported
In-process research and development - Vicinium $35,400
 $
In-process research and development - U.S. Vicinium $
 $12,200
In-process research and development - E.U. Vicinium $
 $41,100
In-process research and development - R.O.W. Vicinium $
 $7,200
In-process research and development - Proxinium $800
 $
Goodwill $10,312
 $16,864
Deferred tax liability $(9,774) $(16,335)
Contingent Consideration $(21,900) $(46,200)
Intangibles
The revised fair values noted above did not have an impactIntangible assets on the Company’sCompany's consolidated statementbalance sheet are the result of operationsthe Viventia Acquisition in September 2016. The following table sets forth the composition of intangible assets as of December 31, 2021 and comprehensive income (loss), as the effected assets are indefinite-lived and therefore, not amortized. The revised Contingent Consideration also did not result in an impact to the consolidated statement of operations and comprehensive income (loss) as the change was to the initial value used to complete the preliminary purchase price allocation and not based on facts and circumstances that arose subsequent to the Acquisition Date.2020 (in thousands):
 December 31,
20212020
IPR&D intangible assets:
Vicineum United States rights$— $31,700 
Vicineum European Union rights14,700 14,700 
Total Intangibles$14,700 $46,400 
The preliminary fair value of the acquired intangible assets wasfor the US and EU rights of Vicineum is determined using a risk-adjusted discounted cash flow approach, which includes probability adjustments for projected revenues and operating expenses based on the success rates assigned to each stage of development for each geographical region; as well as a discount rate of 26.1%rates applied to the projected cash flows. The remaining estimated costIn August 2021, the Company received a CRL from the FDA regarding its BLA for Vicineum for the
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treatment of NMIBC, the Company’s lead product candidate. In the CRL, the FDA determined that it could not approve the BLA for Vicineum in its present form and provided recommendations specific to additional clinical/statistical data and analyses in addition to CMC issues pertaining to a recent pre-approval inspection and product quality. Given the inherent uncertainty in the development plans for the Vicinium U.S. IPR&D asset is $48.0 million, with an expected completion date of no earlier than 2019. The remaining estimated cost of development for the Vicinium E.U. IPR&D asset is $25.0 million with an expected completion date of no earlier than 2022. The remaining estimated cost of development for the Vicinium R.O.W. IPR&D asset is $25.0 million, with an expected completion date of no earlier than 2024.

The Company believes the assumptions described above are representative of those a market participant would use in estimating fair value.
The deferred tax liability of $16.3 million primarily relates to the potential future impairments or amortization associated with IPR&D intangible assets, which is not deductible for tax purposes, and which cannot be usedVicineum as a source of income to realize deferred tax assets. As a result the Company recorded the deferred tax liability with an offset to goodwill.

The amount allocated to the IPR&D is considered to be indefinite-lived until the completion or abandonment of the associated researchCRL and development efforts. Asthe Company’s withdrawal of December 31, 2016, thereits MAA, an impairment analysis was no impairment related toconducted in the IPR&D.

The preliminary fairthird quarter of 2021, which concluded that the carrying value of the Company’s Contingent Considerationintangible asset of Vicineum United States rights was determined usingfully impaired as of September 30, 2021. The $31.7 million of impairment charges as of September 30, 2021 are due to delays in the expected start of commercialization and lower probabilities of successful achievement of regulatory milestones and commercial sales, the period in which these milestones and sales aresuccess, combined with higher operating expenses expected to be achieved ranging fromincurred prior to commercialization, resulting in lower expected future cash flows estimated in the US market. At this time, management has assessed that the carrying value of the Vicineum EU rights is not at significant risk of impairment in the future within the current range of commercialization timelines and POS assumptions. This is primarily due to the fact that the Company expects the Vicineum sales outside of the US to be two to three times the expected sales volume in the US, based on management’s reassessment of the total addressable global market for high-risk NMIBC during the quarter ended June 30, 2019, to 2033,wherein management determined that both the level ofglobal market size and the estimated potential Vicineum commercial sales within the global market were likely higher than the Company's previous estimate. In addition, the EU asset is burdened with significantly less expense than the US asset, as the Company’s strategic operating plan is to sublicense Vicineum to business development partners in all regions outside the US, including the EU, with it earning a potential combination of Vicinium,upfront, milestone, and discount rates ranging from 8.6% to 13.7%. Significant changes in anyroyalty payments, and the business development partner bearing the majority of these assumptions would resultregulatory and commercialization costs.
In October and December 2021, we participated in a significantly higherCMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the requirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of our a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or lower fair value measurement.less than adequate BCG.
The Company allocatedperformed the excessannual impairment test, which incorporated the impact of the purchase price overCRL and the identifiablesubsequent Type A Meetings in the fourth quarter of 2021 and concluded that the carrying value of the Company's intangible assets to goodwill. Such goodwill isasset of Vicineum EU rights was not deductible for tax purposes and represents the value placed on expected synergies and deferred tax liabilities recognized in connection with the Acquisition. Asimpaired as of December 31, 2016, there was no impairment of goodwill. All goodwill has been assigned to the Company’s single reporting unit.
These fair value measurements were based on significant inputs not observable in the market and thus represent Level 3 fair value measurements.2021.
The operating results of Viventia for the period from September 20, 2016 to December 31, 2016, which includes no revenue and an operating loss of $3.5 million, have been included in the Company’s consolidated financial statements as of and forCompany did not recognize any impairment charges during the year ended December 31, 2016.2020.

Goodwill
ELEVEN BIOTHERAPEUTICS, INC.Goodwill on the Company's consolidated balance sheet is the result of the Viventia Acquisition in September 2016. Goodwill had a carrying value of $13.1 million as of December 31, 2021 and 2020. Given the inherent uncertainty in the development plans for Vicineum as a result of the CRL and the Company's withdrawal of its MAA, a quantitative impairment analysis was conducted during the third quarter of 2021, in advance of the Company's typical annual assessment date of October 1. While an impairment was recognized in one of its intangible assets, Vicineum US Rights, the Company concluded that the carrying value of its goodwill of $13.1 million was not impaired as of September 30, 2021, with the fair value of equity of the reporting unit exceeding the estimated carrying value of the reporting unit by approximately 45%.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

In October and December 2021, we participated in a CMC Type A Meeting and a Clinical Type A Meeting, respectively, with the FDA to discuss issues raised in the CRL and to discuss design elements of an additional Phase 3 clinical trial for Vicineum, which the FDA confirmed will be required for a potential resubmission of a BLA. Following these Type A Meetings, we believe we have greater clarity of the requirements for potential resubmission of a BLA. We have a Type C Meeting scheduled with the FDA for March 28, 2022, in which we expect to discuss the study protocol for the additional Phase 3 clinical trial that we plan to conduct for potential resubmission of our a BLA for Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG. The Company incurredperformed the annual impairment test, which incorporated the impact of the CRL and the subsequent Type A Meetings in the fourth quarter of 2021 and concluded that there was no goodwill impairment as of December 31, 2021. The Company believes it has sufficient future cash flows from additional geographic regions outside the US to support the value of its goodwill. The Company projects future cash flows based on various timeline assumptions and applies a totalprobability to each outcome based on management’s best estimate. In addition, probabilities of $2.5 millionsuccess in transaction costsachieving certain clinical and regulatory success in connectionthe Company's current development profile (ranging from 45% to 55% globally) also have a material effect on the estimated fair value of its reporting unit as of the impairment assessment date. The Company will continue to evaluate its timelines for commercialization and probability of success of development of Vicineum for the treatment of non-muscle invasive CIS of the bladder in patients previously treated with adequate or less than adequate BCG.
Based on the transaction, excluding Viventia transaction costs, which were included in generalannual testing and administrative expense withinquarterly reviews performed, the consolidated statements of operations and other comprehensive income (loss) forCompany concluded that there was no goodwill impairment during the year ended December 31, 2016.2020.
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9. ACCRUED EXPENSES
The Company’s financial results forfollowing table sets forth the year endedcomposition of accrued expenses as of December 31, 20162021 and 2020 (in thousands):
 December 31,
20212020
Research and development$1,841 $1,372 
Payroll-related expenses2,967 1,892 
Restructuring charge related1,497 — 
Professional fees1,941 684 
Other25 
Total Accrued Expenses$8,255 $3,973 
10. COMMITMENTS AND CONTINGENCIES
Legal Proceedings
From time to time, the Company may become subject to legal proceedings, claims, and litigation arising in the ordinary course of business. When the Company becomes aware of a claim or potential claim, it assesses the likelihood of any loss or exposure. In accordance with authoritative guidance, the Company records loss contingencies in its financial statements only for matters in which losses are inclusiveprobable and can be reasonably estimated. Where a range of Viventia financial results sinceloss can be reasonably estimated with no best estimate in the Acquisition Date. The unauditedrange, the Company records the minimum estimated pro forma results presented below includeliability. If the effectsloss is not probable or the amount of the Acquisition as if it had been consummated asloss cannot be reasonably estimated, the Company discloses the nature of the beginningspecific claim if the likelihood of each period. The pro forma results include the direct expenses of Viventia as well as the additional depreciation expense as a result of the increase in the fair value of the fixed assets. The pro forma results exclude the costs of the transaction, severance and stock-based compensation expenses, the Viventia forgiveness of debtpotential loss is reasonably possible, and the related interest expense in connection with the Acquisition. In addition, the pro forma results do not include any anticipated synergies or other expected benefits of the Acquisition. Accordingly, the unaudited estimated pro forma financial information belowamount involved is not necessarily indicative of either future results of operations or results that might have been achieved had the Acquisition been consummated as of the beginning of each period (in thousands):
 Year Ended December 31,
 2016 2015
Revenue$29,981
 $990
Net loss(3,026) (47,483)
4. Collaboration Agreement
On May 28, 2013, the Company entered into the collaboration and license agreement (the "Collaboration and License Agreement") with ThromboGenics N.V. ("ThromboGenics"). Under the Collaboration and License Agreement, the Company and ThromboGenics collaborated to seek to identify protein or peptide therapeutics that directly modulate any of a specified set of targets in a novel pathway in retinal disease.
ThromboGenics funded certain research and development services performed by the Company during the research term, which was initially thirty (30) months and automatically extended to the extent that the parties mutually agreed in writing. The initial research term concluded in November 2015, however it was amended at that time to extend the performance period into 2016. The Collaboration and License Agreement provided for potential future payments to the Company upon achievement of specified pre-clinical, clinical and regulatory milestones with respect to collaboration products and royalties on sales of collaboration products by ThromboGenics, its affiliates or sublicensees. However, as there have not been any collaboration products identified whose modulation of any of the targets has been confirmed in the course of the research conducted under the Collaboration and License Agreement, none of these milestones or royalties were payable. On August 1, 2016, the Company received notice from ThromboGenics of its termination, effective as of October 31, 2016, of the Collaboration and License Agreement.
material. The Company accounted for this agreement pursuant to ASC Topic 605-25. The Company received a $1.75 million upfront payment and subsequent payments to perform activities undercontinuously assesses the Collaboration and License Agreement at a set rate per full-time equivalent person working on collaboration activities. The Company was recognizing the arrangement consideration using the proportional performance method, by which the amounts were recognized in proportion to the costs incurred based on full time equivalent personnel efforts. Subsequent to the amendment in November 2015, the Company was recognizing revenue on a straight-line basis over the remaining performance period. The Company recorded revenue of $0.4 million, $0.5 million and $2.2 million for the years ended December 31, 2016, 2015 and 2014, respectively. No further amounts are expected to be recognized in the future related to this arrangement. The costs incurred by the Company related to the research activities were recorded as research and development expense in the consolidated statement of operations and comprehensive income (loss).
5. License Agreement with Roche
On June 10, 2016, the Company entered into the License Agreement with Roche, which became effective on August 16, 2016. Under the License Agreement, the Company granted Roche an exclusive, worldwide license, including the right to sublicense, to its patent rights and know-howpotential liability related to the Company’s monoclonal antibody EBI-031 orpending litigation and revises its estimates when additional information becomes available. The Company is not currently a party to any material legal proceedings, other IL-6 antagonist anti-IL-6 monoclonal antibody,than as described below.
On August 19, 2021, August 31, 2021, and October 7, 2021, 3 substantially identical securities class action lawsuits captioned Bibb v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-07025, Cizek v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-07309, and Markman v. Sesen Bio, Inc. et al., Case No. 1:21-cv-08308 were filed against the Company and certain of its officers in the US District Court for the Southern District of New York. The 3 complaints allege violations of Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder based on statements made by the Company concerning its BLA for Vicineum for the treatment of BCG-unresponsive NMIBC. The 3 complaints seek compensatory damages and costs and expenses, including attorneys’ fees. On October 29, 2021, the court consolidated the 3 cases under the caption In re Sesen Bio, Inc. Securities Litigation, Master File No. 1:21-cv-07025-AKH (the “Securities Litigation”), and appointed Ryan Bibb, Rodney Samaan, Lionel Dreshaj and Benjamin Dreshaj (“Lead Plaintiffs”) collectively as the lead plaintiffs under the Private Securities Litigation Reform Act. On November 1, 2021, two stockholders filed motions to make, have made, use, have used, register, have registered, sell, have sold, offerreconsider asking the court to appoint a different lead plaintiff. The court has not ruled on those motions at this time. On November 24, 2021, defendants filed a motion to transfer venue to the US District Court for sale, importthe District of Massachusetts. That motion was fully briefed as of December 13, 2021, but the court has not yet ruled on that motion. On December 6, 2021, the Lead Plaintiffs filed an amended class action complaint (the “Amended Complaint”). The Amended Complaint alleges the same violations of Sections 10(b) and export any product containing such an antibody or any companion diagnostic used to predict or monitor20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder on the same theory as the prior complaints. Defendants’ response to the Amended Complaint is due to be filed on March 7, 2022.
On September 20, 2021 and September 24, 2021, two substantially similar derivative lawsuits captioned Myers v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-11538 and D’Arcy v. Sesen Bio, Inc., et. al., Case No. 1:21-cv-11577 were filed against the Company’s board of directors and certain of its officers in the US District Court for the District of Massachusetts, with the Company named as a nominal defendant. On January 12, 2022, a third derivative complaint captioned Tang v. Sesen Bio, Inc., et al., was filed in Superior Court in Massachusetts against the Company’s board of directors and certain of its officers in the US District Court for the District of Massachusetts, with the Company named as nominal defendant, but no defendant has yet been served. The 3 derivative complaints allege breach of fiduciary duties, waste of corporate assets, and violations of federal securities laws based on statements made by the Company concerning its BLA for Vicineum for the treatment with suchof BCG-unresponsive NMIBC. The D’Arcy complaint further alleges unjust enrichment, abuse of control, gross mismanagement and aiding and abetting thereof. The 3 derivative complaints seek unspecified damages, restitution and disgorgement of profits, benefits and compensation obtained by the defendants and costs and expenses, including attorneys’ fees. On October 18, 2021, the court consolidated the two federal cases under the caption In re Sesen Bio, Inc. Derivative Litigation, Lead Case No. 1:21-cv-11538 (the “Federal Derivative Litigation”). On December 22, 2021, the court entered a product (collectively,joint stipulation among the “Licensed Intellectual Property”).parties

F-19

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Underto stay the License Agreement, RocheFederal Derivative Litigation until after a ruling on any motion to dismiss filed by defendants in the Securities Litigation. Defendants intend to seek a similar stay of the state court derivative litigation in the event any defendant is required to continue developing EBI-031 and any other product made from the Licensed Intellectual Property that contains an IL-6 antagonist anti-IL-6 monoclonal antibody (a “Licensed Product”) at its cost.
Financial Termsserved.
The Company received an upfront license fee of $7.5 million from Rochebelieves that these lawsuits are without merit and Roche agreedintends to pay up to an additional $262.5 million uponvigorously defend against them. The lawsuits are in the achievement of specified regulatory, developmentearly stages and, commercial milestones with respect to up to two unrelated indications. Specifically, an aggregate amount of up to $197.5 million is payableat this time, no assessment can be made as to the Company forlikely outcome or whether the achievement of specified milestones with respectoutcome will be material to the first indication: $72.5 million in development milestones, $50.0 million in regulatory milestones and $75.0 million in commercialization milestones. Additional amounts of up to $65.0 million are payable upon the achievement of specified development and regulatory milestones in a second indication.Company.
The first development milestone payment for the first indication was paid in the amount of $22.5 million as a result of the Investigational New Drug ("IND") application for EBI-031 becoming effective on or before September 15, 2016.
In addition, the Company is entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% for net sales of potential future products containing EBI-031 and up to 50% of these rates for net sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to the buy-out options of Roche further described below.
Buy-Out Options
The License Agreement provides for two “option periods” during which Roche may elect to make a one-time payment to the Company and, in turn, terminate its diligence, milestone and royalty payment obligations under the License Agreement. Specifically, (i) Roche may exercise a buy-out option following the first dosing (“Initiation”) in the first Phase 2 study for a Licensed Product until the day before Initiation of the first Phase 3 study for a Licensed Product, in which case Roche is required to pay the Company $135.0 million within 30 days after Roche's exercise of such buy-out option and receipt of an invoice from the Company, or (ii) Roche may exercise a buy-out option following the day after Initiation of the first Phase 3 study for a Licensed Product until the day before the acceptance for review by the U.S. Food and Drug Administration ("FDA") or other regulatory authority of a biologics license application (“BLA”) or similar application for marketing approval for a Licensed Product in either the United States or in the European Union, in which case Roche is required to pay the Company, within 30 days after Roche’s exercise of such buy-out option and receipt of an invoice from the Company, $265.0 million, which amount would be reduced to $220.0 million if none of the Company’s patent rights containing a composition of matter claim covering any compound or Licensed Product has issued in the European Union.
Termination
The Company or Roche may each terminate the License Agreement if the other party breaches any of its material obligations under the License Agreement and does not cure such breach within a specified cure period. Roche may terminate the License Agreement following effectiveness by providing advance written notice to the Company or by providing written notice if the Company is debarred, disqualified, suspended, excluded, or otherwise declared ineligible from certain federal or state agencies or programs. The Company may terminate the License Agreement if, prior to the first filing of a BLA for a Licensed Product, there is a period of 12 months where Roche is not conducting sufficient development activities with respect to the products made from the Licensed Intellectual Property.
The Company’s License Agreement with Roche contains the following deliverables: 1) an exclusive, worldwide license, including the right to sublicense, to its patent and know-how related to the Company’s monoclonal antibody EBI-031 or any other IL-6 antagonist anti-IL-6 monoclonal antibody; 2) IND regulatory clearance activities; 3) conduct a tissue cross-reactivity study; 4) transfer pre-clinical inventory and 5) perform de minimus post-effective date services.Executive Employment Agreements
The Company has determined that the License Agreement contains four unitsentered into employment agreements and offer letters with certain of accounting. The de minimis post-effective date services were not determined to be substantive,its key executives, providing for separation payments and thus were not considered units of accounting. The $29.9 million of allocable arrangement consideration was allocated to each of the units of accounting using the relative selling price method based on the Company’s best estimate of selling price of each of the units of accounting. The best estimate of selling price of the license was calculated using a discounted cash flow model that included the following key assumptions: the development timeline of EBI-031, future revenue forecast for EBI-031, and an appropriate discount rate to discount the related cash flows and probability of successful development. The best estimate of selling price of the remaining deliverables was based on

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

estimated costs plus a reasonable margin. The allocation of arrangement consideration was not particularly sensitive to changesbenefits in certain circumstances, as defined in the Company's best estimate of selling price given the significant value ascribed to the license deliverable.agreements.
11. LEASES
The Company recognizes arrangement consideration allocated to each unit of accounting when all of the revenue recognition criteria inaccounts for operating leases under ASC 605-25 are satisfiedTopic 842, Leases. The Company's lease portfolio includes an operating lease for that particular unit of accounting. As of December 31, 2016, the basic revenue recognition criteria has been met for all units of accounting except for the transfer of pre-clinical inventory. Accordingly, the Company recognized $29.6 million in revenue related to the License Agreement for the year ended December 31, 2016. The $0.4 million of revenue allocated to the transfer of pre-clinical inventory will be recognized upon delivery of the inventory to Roche.

The Company determined that the milestone payments under the License Agreement were not subject to ASC 605-28 because the achievement of the milestone event depends solely on Roche’s performance. The Company will recognize royalty revenue in the period of sale of the related product(s), based on the underlying contract terms, provided that the reported sales are reliably measurable and the Company has no remaining performance obligations, assuming all other revenue recognition criteria are met.
6. Property and Equipment
Property and equipment and related accumulated depreciation are as follows (in thousands):
 
Estimated Useful
Life (Years)
 December 31,
 2016 2015
Lab equipment5 $457
 $1,961
Furniture and fixtures4 16
 107
Computer equipment3 73
 171
Software3 28
 25
Leasehold improvementsLesser of useful life
or remaining
lease term
 293
 100
   867
 2,364
Less accumulated depreciation and amortization  (71) (1,957)
Total property and equipment, net  $796
 $407
Depreciation expense amounted to $178,000, $366,000 and $410,000 for the years ended December 31, 2016, 2015 and 2014, respectively. During 2016, the Company disposed/sold property and equipment with a net book value of $299,000 for proceeds of $325,000.
7. Accrued Expenses
Accrued expenses consisted of the following (in thousands):
 December 31,
 2016 2015
Development costs$852
 $931
Employee compensation352
 573
Professional fees413
 194
Interest
 88
Other157

8
 $1,774
 $1,794
8. Indebtedness
Term Loan

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

In May 2010, the Company entered into the Loan Agreement with Silicon Valley Bank ("SVB"), pursuant to which the Company could borrow up to $1.5 million. The Loan Agreement was secured by substantially all of the Company’s assets, excluding its intellectual property. Outstanding borrowings bore interest at a fixed rate per annum equal to 8.25%. The Company borrowed the entire $1.5 million in two equal advances in June 2010 and July 2010, and principal and interest payments were due through September 2013.
In September 2012, the Company modified the Loan Agreement with SVB such that the Company was able to borrow up to $5.0 million (the “First Loan Modification Agreement”). On September 4, 2012, the Company borrowed $2.0 million under the First Loan Modification Agreement, of which $0.5 million of the proceeds was used to repay the outstanding balance of the original Loan Agreement. The interest rate on the amount borrowed in 2012 was fixed at 5.75% per annum. On February 1, 2013, the Company borrowed the remaining available loan amount of $3.0 million under the First Loan Modification Agreement. The interest rate on the amount borrowed in 2013 was fixed at 5.75% per annum. The Company made interest-only payments until October 1, 2013, and was required to make consecutive equal monthly payments of principal, plus accrued interest, over the remaining term. The Company accounted for the amendment as a modification, as the terms of the amendment were not substantially different from the original terms of the Loan Agreement.
In November 2014, the Company modified the Loan Agreement with SVB such that the Company was able to increase the amount it may borrow to $15.0 million (the “Second Loan Modification Agreement”). On November 25, 2014, the Company borrowed a first tranche of $10.0 million, of which $3.2 million was applied to the repayment of outstanding debt obligations to SVB under the First Loan Modification Agreement, including accrued interest. The Company borrowed the remaining $5.0 million on May 11, 2015. The interest rate for each tranche was set at the funding date for such tranche at 3.75% above the prime lending rate published in the Wall Street Journal. The interest rate on the amount borrowed in 2014 was fixed at 7.00% per annum.
The Company accounted for the Second Loan Modification Agreement as an extinguishment as the terms of the Second Loan Modification Agreement were substantially different from the original terms of the Loan Agreement, and recorded a loss on extinguishment of $0.5 million, which was recorded in other income (expense) on the consolidated statements of operations and comprehensive income (loss). The warrants issued in connection with the debt (See Note 11) were treated as part of the extinguishment loss.
In connection with the Second Loan Modification Agreement, the Company issued to SVB and Life Science Loans, LLC warrants to purchase a total of 27,500 shares of the Company's common stock at a per share exercise price of $11.04 (the "Warrants"). In connection with the Company's draw-down of $5.0 million in May 2015 the Warrants automatically became exercisable for the purchase of an additional 27,500 shares of common stock at a per share exercise price of $11.83. The exercise price and the number of shares are subject to adjustment upon a merger event, reclassification of the shares of common stock, subdivision or combination of the shares of common stock or certain dividend payments. The Warrants may be exercised on a cashless basis at any time. The Warrants are exercisable until November 24, 2024 and will be exercised automatically on a net issuance basis if not exercised prior to the expiration date and if the then-current fair market value of one share of common stock is greater than the exercise price then in effect.
On December 4, 2015, the Company entered into a Consent and Third Amendment to Loan and Security Agreement (the "Third Loan Amendment Agreement") with SVB in connection with the assignment of the Company's proprietary SuperminTM albumin variant assets to a third party pursuant to a Patent Assignment and License Agreement dated as of December 4, 2015.
The Third Loan Amendment Agreement modified the repayment terms of the Loan Agreement under specified circumstances and the circumstances under which the Company was required to fund a cash collateral account with SVB in an amount equal to the outstanding amount under the Loan Agreement. As a result of the Company's Phase 3 clinical trial of isunakinra for the treatment of severe allergic conjunctivitis, which constituted a "Study Discontinuation Event" pursuant to the terms of the Loan Agreement, the Company was required to fund a cash collateral account with SVB in an amount equal to $15.1 million, representing the outstanding obligations under the Loan Agreement.
The Company accounted for the Third Loan Amendment Agreement as a modification as the terms of the Third Loan Amendment Agreement were not substantially different from the terms of the Second Loan Modification Agreement. The Company recorded a debt discount of $328,000, which was being accreted as interest expense over the remaining term of the loan. The Company recorded interest expense of $102,000 for the year ended December 31, 2015. The offsetting credit to the debt discount was recorded as additional paid-in-capital.

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

The Company also accreted the final payment over the term of the debt using the effective interest method. As of December 31, 2015, the Company had accreted $354,000 of the final payment. The Company also evaluated the debt for embedded features that need to be bifurcated, noting that the contingent interest feature and events of default were required to be bifurcated, but were concluded to be de minimis in value at inception and at December 31, 2015. At December 31, 2015, $14.1 million was outstanding on the term loan under the Loan Agreement.
On March 1, 2016, the Company prepaid all outstanding amounts owed to SVB under the amended Loan Agreement. These obligations included the outstanding principal and interest of $13.8 million and a prepayment penalty of $0.2 million. In addition, the Company was required to pay a final payment equal to 6% of the amounts borrowed under the amended Loan Agreement, or $0.9 million, of which $0.4 million was accrued as of March 1, 2016. In addition, as a result of the prepayment, the Company wrote off the unamortized debt issuance costs and debt discount of $0.2 million. In connection with the prepayment, the Company recorded a loss on extinguishment of debt of $0.9 million, which is included in other income (expense) on the consolidated statements of operations and comprehensive income (loss) for the year ended December 31, 2016.
9. Commitments and Contingencies
Operating Leases
The Company leases a manufacturing31,100 square foot facility located in Winnipeg, Manitoba Canada, which consists of an approximately 31,400 square foot manufacturing, laboratory, warehouse and office facility, under a five year renewablespace. In September 2020, the Company entered into an extension of this lease for an additional two years, through September 20202022, with a right to renewextend the lease for one1 subsequent five-yearthree-year term. The minimum monthly rent under this lease is approximately $25,000CAD $18,100 (approximately $14,300 at exchange rates in effect on December 31, 2021). In addition to rent expense, the Company expects to incur CAD $18,200 per month plus additional rent and applicable taxes. Rent expenserelated to operating expenses (approximately $14,300 at exchange rates in effect on December 31, 2021). Operating lease cost under this lease, was $86,000including the related operating costs, were $0.3 million and $0.3 million for the period beginningyear ended December 31, 2021 and $0.3 million and $0.3 million for the year ended December 31, 2020, respectively.
The asset component of the Company’s operating leases is recorded as operating lease right-of-use assets and reported within other assets on the Acquisition Date through December 31, 2016.Company's consolidated balance sheets. The short-term lease liability is recorded in other current liabilities and the long-term lease liability is recorded in other liabilities on the Company’s consolidated balance sheets. Operating lease cost is recognized on a straight-line basis over the term of the lease.
TheIn addition, the Company leasedhas short-term property leases for modular office space for 1) its corporate headquarters in Cambridge, Massachusetts under an operating lease that was scheduledMA and 2) office space in Philadelphia, PA. The short-term leases renew every three months to expire on April 30, 2018. On October 14, 2016,six months and currently extend through June 2022 and May 2022, respectively. The minimum monthly rent for these office spaces is $2,100 and $18,400, respectively, which is subject to change if and as the Company andadds space to or deducts space from the landlord mutually agreed to terminate theleases.
The components of lease and voluntarily surrender the premises. The Company recorded $565,000, $494,000 and $416,000 in rent expensecost for the years ended December 31, 2016, 20152021 and 2014, respectively, for this lease.
The minimum aggregate future lease commitment at December 31, 20162020 is as follows (in thousands):
Year Ended December 31, 2021Year Ended December 31, 2020
Lease Cost:
Operating lease (including related operating costs)$327 $301 
Short term property leases262 261 
Total lease costs$589 $562 

2017$324
2018296
2019296
2020222
 $1,138

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

License Agreements
The Company is a party to or assignee of license agreements that may require it to make future payments relating to license fees, sublicense fees, milestone fees, and royalties on future sales of licensed products.
Supplemental Information:Year Ended December 31, 2021Year Ended December 31, 2020
Weighted-average remaining lease term (years)0.751.75
Weighted-average discount rate - operating leases12 %12 %
The following outlinestable sets forth the license agreements the Company believes it will oweCompany's future minimum lease payments under if its product candidates reach certain milestones and begin to generate revenue.non-cancelable leases as of December 31, 2021 (in thousands):
The Schepens Eye Research Institute, Inc. / The Massachusetts Eye and Ear Infirmary
F-20


Minimum Lease Payments:Year Ended December 31, 2021
Total future minimum lease payments (2022)$129 
Less: Amounts representing present value adjustment(5)
Operating lease liabilities, net of current portion$124
12. STOCKHOLDERS' EQUITY DEFICIT
Equity Financings
ATM Offering
In July 2010,November 2019, the Company entered into a license agreementan Open Market Sale Agreement SM (the "Sale Agreement") with The Schepens Eye Research Institute, Inc. (“Schepens”Jefferies LLC ("Jefferies"), pursuant tounder which Schepens granted the Company an exclusive royalty-bearing license, with the right to grant sublicenses, to certain intellectual property rights for the development of IL-1blocker for ophthalmic indications. The Company is obligated to pay Schepens up to $4.7 millionmay issue and issue up to 105,000sell shares of its common stock, par value $0.001 per share, from time to time (the “ATM Offering”) for an aggregate sales price of up to $35 million through Jefferies. In October 2020 and February 2021, the Company entered into Amendments No. 1 and No. 2 to the Sale Agreement, respectively. Amendments No. 1 and No. 2 modified the Sale Agreement to reflect that the Company may issue and sell shares of its common stock from time to time for an aggregate sales price of up to an additional $50.0 million and $34.5 million, respectively. In June 2021, the Company entered into Amendment No. 3 to the Sale Agreement, which modified the Sale Agreement to remove the maximum dollar amount of shares of common stock that may be sold pursuant to the Sale Agreement. In June and July 2021, the Company filed prospectus supplements with the SEC in milestone payments, contingentconnection with the offer and sale of up to an aggregate of $200 million of common stock pursuant to the Sale Agreement. Sales are made by any method that is deemed to be an ATM offering as defined in Rule 415(a)(4) of the Securities Act of 1933, as amended, including but not limited to sales made directly on or through the Nasdaq Global Market or any other existing trading market for the Company's common stock. The Company may sell shares of its common stock efficiently from time to time but has no obligation to sell any of its common stock and may at any time suspend offers under the Sale Agreement or terminate the Sale Agreement. Subject to the terms and conditions of the Sale Agreement, Jefferies will use its commercially reasonable efforts to sell common stock from time to time, as the sales agent, based upon the issuance of certain patents. In addition,Company’s instructions, which include a prohibition on sales below a minimum price set by the Company from time to time. The Company has provided Jefferies with customary indemnification rights, and Jefferies is obligatedentitled to pay Schepens a tiered single-digit royalty based on net salescommission at a fixed rate equal to 3.0% of the licensed product. Duringgross proceeds for each sale of common stock under the Sale Agreement. The Company raised $175.0 million of net proceeds from the sale of 56.9 million shares of common stock at a weighted-average price of $3.17 per share during the year ended December 31, 2014,2021, compared to$38.0 million of net proceeds from the sale of 33.4 millionshares of common stock at a weighted-average price of$1.17per share during the year ended December 31, 2020. Share issuance costs, including sales agent commissions, related to the ATM Offering totaled $5.4 million and$1.2 millionduring the year ended December 31, 2021 and 2020, respectively.
June 2019 Financing
In June 2019, the Company paid Schepensraised $27.8 million of net proceeds from the sale of 20.4 million shares of common stock and expensed $350,000accompanying warrants to purchase an additional 20.4 million shares of common stock in an underwritten public offering (the "June 2019 Financing"). The combined purchase price for each share of common stock and accompanying warrant was $1.47. Subject to certain ownership limitations, the warrants issued in the June 2019 Financing were exercisable immediately upon issuance at an exercise price of $1.47 per share, subject to adjustments as provided under the achievement of a clinical milestone. On February 10, 2016, the Company provided notice to Schepens of the Company’s termination of the license agreement, which termination was effective 60 days following receiptterms of such notice by Schepens.warrants, and had a one-year term that expired on June 21, 2020.
The UniversityPreferred Stock
Pursuant to its Amended and Restated Certificate of Zurich

The Company has an exclusive license agreement with the UniversityIncorporation (the "Certificate of Zurich ("Zurich"Incorporation"), which grants the Company an exclusive license, with the right to sublicense, to make, have made, use and sell under certain patents primarily directed to the Company's targeting agent, including EpCAM chimera, and related immunoconjugates and methods of use and manufacture of the same. These patents cover some key aspects of the Company’s product candidates Vicinium and Proxinium. The Company is obligated to pay $750,000 in milestone payments for its first product candidate in the event it reaches the applicable clinical development milestones. As part of the consideration, the Company is also obligatedauthorized to pay upissue 5.0 million shares of "blank check" preferred stock, $0.001 par value per share, which enables its board of directors, from time to a 4% royalty ontime, to create one or more series of preferred stock. Each series of preferred stock issued shall have the net product sales for any products that are coveredrights, preferences, privileges and restrictions as designated by the applicable Zurich patent rights.board of directors. The issuance of any series of preferred stock could affect, among other things, the dividend, voting and liquidation rights of the Company's common stock. The Company has the right to reduce the amounthad no preferred stock issued and outstanding as of royalties owed to Zurich if the total royalty rate owedDecember 31, 2021 and 2020.
Common Stock
Following approval by the CompanyCompany’s stockholders on May 3, 2021, an amendment became effective to Zurichthe Certificate of Incorporation that increased the number of authorized shares of common stock from 200 million to 400 million, of which199 millionand140 millionshares were issued and any other third party is 10% or greater, provided that the royalty rate may not be less than 2%outstanding as of net sales. The obligation to pay royalties in a particular country expires upon the expiration, lapse or abandonment of the last of the Zurich patent rights that covers the manufacture, use or sale of a productDecember 31, 2021 and there is no obligation to pay royalties in a country if there is no patent rights that cover the manufacture, use or sale of a product.

Merck KGaA
The Company holds an exclusive license agreement with Merck KGaA ("Merck") pursuant to which2020, respectively. In addition, the Company was granted an exclusive license, withhad reserved for issuance the right to sublicense, under certain patents and technology relating to aspectsfollowing amounts of VB6-845d, to make, use, sell and import VB6-845d or any products that would otherwise infringe such patents in the fieldshares of therapeutic or diagnostic purposes in humans. Under the agreement, the Company may be obligated to make milestone payments in respect of certain stages of regulatory approval reached by a product candidate generated by this technology or covered by a licensed patent including: (a) $2,000,000 upon the start of the first Phase 3 clinical trial for a licensed product; (b) $2,000,000 upon submission of the first Biologics License Application ("BLA") for a licensed product; (c) $2,000,000 upon the approval of the first BLA in certain countries for a licensed product and $1,000,000 upon each of the second and third approvals of a BLA in certain additional countriesits common stock for the same licensed product (totalpurposes described below as of $4,000,000);December 31, 2021 and (d) $2,000,000 upon the approval of the second BLA in certain countries for a licensed product; and $1,000,000 upon each of the second and third approvals of the second BLA in certain additional countries for the same licensed product (total of $4,000,000). The Company may be obligated to pay a 1.5% royalty on the net product sales up to $150,000,000 and a 2% royalty on the net product sales above such amount.2020 (in thousands):
The license remains in force on a country-by-country basis and product-by-product basis, and expires at the longer of (i) the expiration of the last to expire patent within the licensed patent rights that covers a licensed product and (ii) 10 years from the first commercial sale of a licensed product in such country; provided that no royalty is payable for more than 15 years from the first commercial launch of a licensed product anywhere in the world.
F-21

Legal Contingencies
The Company does not currently have any contingencies related to ongoing legal matters.

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

10. Common Stock
December 31,
20212020
Shares of common stock issued199,464140,450
Shares of common stock reserved for issuance for:
Warrants199 2,247 
Stock options15,703 10,147 
RSUs3,041 — 
Shares available for grant under 2014 Stock Incentive Plan8,933 4,863 
Shares available for sale under 2014 Employee Stock Purchase Plan2,300 — 
Total shares of common stock issued and reserved for issuance229,640 157,707 
The voting, dividend and liquidation rights of holders of shares of common stock are subject to and qualified by the rights, powers and preferences of the holders of the shares of preferred stock. The Company’s common stock has the following characteristics:
Voting
The holdersEach share of common stock shall have voting rights atentitles the holder to 1 vote on all meetingsmatters submitted to a vote of stockholders, each such holder being entitled to one vote for each share thereof held by such holder;the Company's stockholders; provided, however, that, except as otherwise required by law, holders of common stock shall not be entitled to vote on any amendment to the Company’s certificateCertificate of incorporationIncorporation that relates solely to the terms of one or more outstanding series of preferred stock if the holders of such affected series are entitled, either separately or together as a class with the holders of one or more such series, to vote thereon. There shall be no cumulative voting.
Dividends
Dividends may be declared and paid on the common stock from funds lawfully available thereof as and when determined by the Boardboard of directors and subject to any preferential dividend or other rights of any then outstandingthen-outstanding preferred stock.
Liquidation The Company has never declared or paid, and for the foreseeable future does not expect to declare or pay, dividends on its common stock.
Upon the dissolution or liquidation of the Company, whether voluntary or involuntary, holders of common stock will be entitled to receive all assets of the Company available for distribution to its stockholders, subject to any preferential or other rights of any then outstandingthen-outstanding preferred stock.
Reserved for Future IssuanceWarrants
The Company has reserved the following shares of stock:
 As of December 31,
 2016 2015
Unvested restricted stock22,150
 41,657
Restricted stock units3,333
 150,932
Options to purchase common stock3,112,771
 2,319,772
Warrants to purchase common stock926,840
 926,840
Employee stock purchase plan68,609
 157,480
 4,133,703

3,596,681
Reverse Stock Split
On January 21, 2014, the Board and stockholders of the Company approved a one-for-6.35 reverse stock splitAll of the Company’s issuedoutstanding warrants are non-tradeable and outstanding common stock, which was effectedequity-classified because they meet the derivative scope exception under ASC Topic 815-40, Derivatives and Hedging - Contracts in Entity’s Own Equity ("ASC 815-40"). The following table sets forth the Company's warrant activity for the year ended December 31, 2021 (in thousands):
IssuedExercise
Price
ExpirationDecember 31, 2020Issued(Exercised)(Cancelled)December 31, 2021
Jun-2019$1.47Jun-2020— — — — — 
Mar-2018$0.55*Mar-20231,705 — (1,573)— 132 
Nov-2017$0.55*Nov-2022487 — (475)— 12 
May-2015$11.83Nov-202428 — — — 28 
Nov-2014$11.04Nov-202427 — — — 27 
2,247  (2,048) 199 
* Exercise price shown (i) reflects modification described below and (ii) subject to further adjustment based on January 21, 2014. Stockholders entitled to fractional shares as a result of the reverse stock split received a cash payment in lieu of receiving fractional shares. The Company’s historical share and per share information related to issued and outstanding common stock and outstanding options and warrants exercisable for common stock have been retroactively adjusted to give effect to this reverse stock split. Shares of common stock underlying outstanding stock options and other equity instruments convertible into common stock were proportionately reduced and the respective exercise prices, if applicable, were proportionately increased in accordance with the terms of the agreements governing such securities.
Initial Public Offering
On February 11, 2014, the Company completed its IPO, whereby the Company sold 5,750,000 shares of its common stock (inclusive of 750,000 shares of common stock solddown round provision added by the Company pursuant to the full exercise of an overallotment option granted to the underwriters in connection with the offering) at a price of $10.00 per share. The shares began trading on the Nasdaq Global Market on February 6, 2014. The aggregate net proceeds received by the Company from the offering were $50.2

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

million, after deducting underwriting discounts and commissions and other offering expenses payable by the Company. Upon the closing of the IPO, all outstanding shares of convertible preferred stock converted into 8,260,444 shares of common stock; and warrants exercisable for convertible preferred stock were automatically converted into warrants exercisable for 30,708 shares of common stock, resulting in the reclassification of the related convertible preferred stock warrant liability to additional paid-in capital. Additionally, the Company is now authorized to issue 200,000,000 shares of common stock and 5,000,000 shares of preferred stock.
Securities Purchase Agreement
On December 2, 2014, the Company issued and sold 1,743,680 shares of its common stock, par value $0.001 per share (the “Shares”) and warrants to purchase 871,840 shares of common stock (the “PIPE Warrants”) in a private placement. Investors paid $11.47 per Share and also received a PIPE Warrant to purchase one-half of one share of common stock for every one Share purchased. The PIPE Warrants are exercisable at an exercise price of $15.00 per share and expire three years from the date of issuance. The Company received net proceeds from the offering of $18.2 million after deducting placement agent’s fees and other offering expenses payable by the Company.
At-the-Market Facilityamendment described below.
During the year ended December 31, 2016,2021, the Company didreceived proceeds of $1.1 million from the exercises of 1.6 million 2018 Warrants and 0.5 million 2017 Warrants.
Warrant Modifications
In October 2019, the Company entered into transactions with holders of its outstanding 2018 Warrants and 2017 Warrants to purchase the Company's common stock. At such time, the 2018 Warrants and 2017 Warrants utilized the same form of warrant, which contained a prohibition on variable rate transactions (as defined therein). Warrant holders agreed to waive such
F-22


prohibition in exchange for certain concessions from the Company. Management evaluated the warrants after modifications and determined that they continued to be equity-classified under the derivative scope exception of ASC 815-40. The warrants were revalued immediately before and immediately after the modifications to calculate the $1.1 million incremental value of the modified warrants. The Company considers this incremental value to be akin to an offering cost since the modifications were directly related to enabling the ATM Offering and would not sell any shareshave otherwise been incurred. Therefore, in the fourth quarter of 2019, management initially capitalized the $1.1 million to deferred financing cost asset, with an offsetting credit to additional paid-in capital, and then reclassified the deferred financing cost asset to reduce the ATM Offering proceeds within equity as proceeds were received from sales of common stock under the ATM Offering.
2018 Warrants
In October 2019, the Company entered into transactions with the holders of its outstanding 2018 Warrants pursuant to which such holders either (i) exercised their warrants pursuant to a Warrant Exercise Agreement (the "2018 Warrant Exercise Agreements") or (ii) amended their warrants pursuant to a Warrant Amendment Agreement (the "2018 Warrant Amendment Agreements"). As consideration for those holders executing the "at-the-market" sales agreement with Cowen and Company, LLC entered into in March 2015. For the year ended December 31, 2015,2018 Warrant Exercise Agreements, the Company had sold 1,446,781 shares pursuantreduced the exercise price of the warrants from $1.20 to $0.60 per share of the sales agreement,Company's common stock, resulting in proceeds of $12.7$2.0 million netfrom the exercise of commissions3.4 million warrants. Pursuant to the 2018 Warrant Amendment Agreements, the prohibition on certain variable rate transactions included in the 2018 Warrants was amended to exclude ATM offerings and issuance costs.
11. Common Stock Warrants
On November 25, 2014, the Company issuedexercise price of the Warrantswarrants was reduced from $1.20 to purchase a totalthe lesser of 27,500 shares(a) $0.95 per share of common stock and (b) the exercise price as determined from time to SVB and Life Science Loans, LLC at antime pursuant to the anti-dilution provisions in the 2018 Warrant Amendment Agreements. During the second quarter of 2020, the anti-dilution provision was triggered to lower the exercise price of $11.04 per share in connection with the Second Loan Modification Agreement (See Note 8). warrants to $0.55; as such, the Company recognized a deemed dividend of approximately $0.1 million which reduced the income available to common stockholders. As the Company has an accumulated deficit balance, there is no overall impact to additional paid-in capital, as the deemed dividend is recorded as offsetting debit and credit entries to additional paid-in capital. Therefore, the amounts were not presented on the Statement of Stockholders' (Deficit) Equity.
In connection with the 2018 Warrant Exercise Agreements and 2018 Warrant Amendment Agreements, the Company entered into an amendment to the Securities Purchase Agreement dated March 21, 2018 related to the March 2018 Financing, by and among the Company and each purchaser identified on the signature pages thereto, with certain holders representing greater than 50.1% of the securities issued based on initial subscription amounts, pursuant to which the prohibition on variable rate transactions, including ATM offerings, was deleted in its entirety.
2017 Warrants
In October 2019, the Company entered into transactions with the holders of its outstanding 2017 Warrants pursuant to which such holders either (i) exercised their warrants pursuant to a Warrant Exercise Agreement (the "2017 Warrant Exercise Agreements") or (ii) amended their warrants pursuant to a Warrant Amendment Agreement (the "2017 Warrant Amendment Agreements"). As consideration for those holders executing the 2017 Warrant Exercise Agreements, the Company reduced the exercise price of the warrants from $0.80 to $0.55 per share of the Company's drawdowncommon stock. Pursuant to the 2017 Warrant Amendment Agreements, the prohibition on certain variable rate transactions, including ATM offerings, included in the 2017 Warrants was deleted in its entirety and the exercise price of an additional $5.0 millionthe warrants was reduced from $0.80 to the lesser of (a) $0.55 per share of common stock and (b) the exercise price as determined from time to time pursuant to the Loan Agreementanti-dilution provisions in May 2015, the Warrants automatically became exercisable for the purchase of an additional 27,500 shares of common stock at a per share exercise price of $11.83. The Warrants are exercisable immediately and have a ten-year life. The Warrants were initially valued at $0.3 million each using the Black-Scholes option-pricing model.
On December 2, 2014, the Company issued the PIPE Warrants to purchase 871,840 shares of common stock at an exercise price of $15.00 per share in connection with a private placement of common stock (See Note 10). The PIPE Warrants are exercisable immediately and have a three-year life. Upon certain events, the Company is required to settle the PIPE Warrants for cash. As a result, the Company has classified the PIPE Warrants as a liability.
The Company allocated $3.0 million to the PIPE Warrants with the residual proceeds allocated to the common stock. The fair value of the PIPE Warrants was determined using the Black-Scholes option pricing model. The fair value of the PIPE Warrants is re-measured at each reporting date using then-current assumptions with changes in fair value charged to other income (expense) on the statements of operations and comprehensive income (loss).2017 Warrant Amendment Agreements. As of December 31, 20162021, there has been no adjustment to the exercise price of these warrants.
13. EARNINGS (LOSS) PER SHARE
A net loss cannot be diluted. Therefore, when the Company is in a net loss position, basic and 2015,diluted loss per common share are the PIPE Warrants were valuedsame. If the Company achieves profitability, the denominator of a diluted earnings per common share calculation includes both the weighted-average number of shares outstanding and the number of common stock equivalents, if the inclusion of such common stock equivalents would be dilutive. Dilutive common stock equivalents potentially include warrants, stock options and non-vested restricted stock awards and units using the Black-Scholes option-pricing model at $5,000treasury stock method, along with the effect, if any, from outstanding convertible securities. The majority of the Company’s outstanding warrants to purchase common stock have participation rights to any dividends that may be declared in the future and $115,000, respectively. are therefore considered to be participating securities. Participating securities have the effect of diluting both basic and diluted earnings per share during periods of income. During periods of loss, no loss is allocated to the participating securities since the holders have no contractual obligation to share in the losses of the Company.
Additionally, an entity that presents earnings per share shall recognize the value of the effect of an anti-dilution provision in an equity-classified freestanding financial instrument in the period the anti-dilution provision is triggered. That effect shall be treated as a deemed dividend and as a reduction of income available to common stockholders in basic earnings per share. The
F-23


deemed dividend is added back to income available to common stockholders when applying the treasury stock method for diluted earnings per share.
For periods with net income, diluted net earnings per share is calculated by either (i) adjusting the weighted-average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period as determined using the treasury stock method or (ii) the two-class method considering common stock equivalents, whichever is more dilutive. The two-class method is an earnings allocation formula that treats a participating security as having rights to earnings that otherwise would have been available to common stockholders.
The two-class method was not applied for the twelve months ended December 31, 2021, 2020 and 2019 as the Company’s participating securities do not have any obligation to absorb net losses.
For purposes of the diluted net loss per share calculation, common stock equivalents are excluded from the calculation if their effect would be anti-dilutive.
The following assumptions were used in valuingpotentially dilutive securities outstanding as of December 31, 2021, 2020 and 2019 have been excluded from the PIPE Warrants:denominator of the diluted loss per share of common stock outstanding calculation (in thousands):
December 31,
 202120202019
Warrants199 2,247 22,895 
Stock options15,703 10,147 6,236 
Total15,902 12,394 29,131 
 December 31,
2016
 
December 31,
2015
 
Risk-free interest rate0.85% 1.06% 
Expected dividend yield% % 
Expected term (in years)0.92
 1.92
 
Expected volatility83.39% 70.67% 
14. SHARE-BASED COMPENSATION
The change in fair valuefollowing table sets forth the amount of $(0.1) millionshare-based compensation expense recognized by the Company by line item on its Consolidated Statements of Operations and $(3.1) million was recorded as other income in the accompanying statements of operations and comprehensive income (loss)Comprehensive Loss for the years ended December 31, 20162021, 2020 and 2015, respectively. As of December 31, 2016, none of the PIPE Warrants had been exercised.2019 (in thousands):
12. Share-Based Payments

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

2009 Stock Incentive Plan
The Company maintains the Eleven Biotherapeutics, Inc. 2009 Stock Incentive Plan (the “2009 Plan”), as amended and restated, for employees, directors, consultants, and advisors to the Company. Upon the closing of the Company’s IPO in February 2014, the Company ceased granting stock incentive awards under the 2009 Plan. The 2009 Plan provided for the grant of incentive and non-qualified stock options and restricted stock grants as determined by the Board. Under the 2009 Plan, stock options could not be granted at less than fair value on the date of the grant. Furthermore, the exercise price of incentive stock options granted to an employee, who, at the time of grant, is a 10% shareholder, could not be less than 110% of the fair value on the date of grant.
Terms of stock option agreements, including vesting requirements, are determined by the Board, subject to the provisions of the 2009 Plan. Options and restricted stock awards granted by the Company generally vest ratably over four years, with a one-year cliff for new employee awards, and are exercisable from the date of grant for a period of ten years. Restricted stock issuances and early exercises of stock options are subject to the Company’s right of repurchase at the original issuance price, which right lapses over the vesting period of the stock. For options and restricted stock awards granted to date, the exercise price equaled the estimated fair value of the common stock as determined by the Board on the date of grant.
Year ended December 31,
202120202019
Research and development$973 $350 $188 
General and administrative4,170 1,407 1,049 
Total Share Based Compensation$5,143 $1,757 $1,237 
2014 Stock Incentive Plan
In December 2013, the Company’sThe Company's 2014 Stock Incentive Plan, as amended (the “2014 Plan”"2014 Plan"), was adopted by the Boardits board of directors in December 2013 and wassubsequently approved by the Company’sits stockholders in January 2014. The 2014 Plan became effective immediately prior to the closing of the Company’sCompany's IPO in February 2014. The 2014 Planand provides for the grant of incentive stock options, nonstatutoryand non-qualified stock options, restricted stock awards and restricted stock units, stock appreciation rights and other stock-based awards. Theawards, with amounts and terms of grants determined by the Company's board of directors at the time of grant, to the Company's employees, officers, directors, consultants and advisors.
At the Annual Meeting of the Company's stockholders in June 2019, the Company's stockholders approved an amendment to the 2014 Plan that (i) increased by 7.9 million the number of shares of the Company’s common stock reserved for issuance under the 2014 Plan isand (ii) eliminated the sum“evergreen” or automatic replenishment provision of (1) 708,661 shares, plus (2)the 2014 Plan, pursuant to which the number of shares (upof common stock authorized for issuance under the 2014 Plan was automatically increased on an annual basis. At the Annual Meeting of the Company’s stockholders in May 2021, the Company’s stockholders approved an amendment to 1,347,821 shares) equal to (a) 1,586 shares (representingthe 2014 Plan that increased by 12 million the number of shares of common stock reserved for issuance under the 2014 Plan. There were approximately 8.9 million shares of common stock available for issuance under the 2014 Plan as of December 31, 2021.
Stock options outstanding under the 2014 Plan generally vest over a four-year period at the rate of 25% of the grant vesting on the first anniversary of the date of grant and 6.25% of the grant vesting at the end of each successive three-month period thereafter. Stock options granted under the 2014 Plan are exercisable for a period of ten years from the date of grant. There were approximately 12.8 million stock options outstanding under the 2014 Plan as of December 31, 2021.
F-24


On September 9, 2021, the Board of Directors and the Compensation Committee of the Company approved a retention program for all current employees, except for the Chief Executive Officer, pursuant to which the Company will provide certain incentives designed to retain such employees (the “Retention Program”). Pursuant to the Retention Program and effective as of October 1, 2021, the Company’s non-executive employees received a combination of a cash bonus award and a one-time restricted stock unit (“RSU”) award which vests in full on September 30, 2022, subject to continued employment through September 30, 2022. Each RSU represents a contingent right to receive 1 share of the Company’s common stock. The Company recorded an expense of $0.5 million for retention-related RSUs for the year ended December 31, 2021. Additionally, the Company expensed $0.6 million in relation to the cash bonus portion of the retention program.
Also pursuant to the Retention Program and effective as of October 1, 2021, the Company’s executive officers, except for the Chief Executive Officer, were granted a one-time performance-based restricted stock unit (“PSU”) award equal to the value of approximately 50 percent of current base salary. Each PSU represents a contingent right to receive 1 share of the Company’s common stock upon the satisfaction of pre-determined performance criteria. Subject to continued employment, such awards vest on September 30, 2023 upon the determination by the Compensation Committee of the level of achievement of certain key milestones consisting of a clinical trial milestone, an employee retention milestone and cash management milestones. As none of the retention milestones were met in the year ended December 31, 2021 and achievement was deemed not probable, the Company did not record expenses for retention-related PSUs. As of December 31, 2021, the unrecognized compensation expense for the retention-related PSUs, granted on October 1, 2021, was $0.4 million.
A summary of the status of restricted stock units is presented below:
Restricted Stock Units
(in thousands)
Unvested at December 31, 2020— 
Granted RSU2,482 
Granted PSU559 
Unvested at December 31, 20213,041

The weighted average remaining contractual life of unvested RSUs and PSUs as of December 31, 2021 is 9.75 years. The Company did not grant restricted stock units during the years ended December 31, 2020 and 2019.
2009 Stock Incentive Plan
The Company maintains a 2009 Stock Incentive Plan, as amended and restated (the "2009 Plan"), which provided for the grant of incentive and non-qualified stock options and restricted stock awards and restricted stock units, with amounts and terms of grants determined by the Company's board of directors at the time of grant, to its employees, officers, directors, consultants and advisors. Upon the closing of its IPO in February 2014, the Company ceased granting awards under the 2009 Plan and all shares (i) available for issuance under the 2009 Plan that remained available for future issuance as of the effectiveness of the 2014 Plan)at such time and (b) the number of shares of the Company’s common stock(ii) subject to outstanding awards under the Company’s 2009 Plan that expire, terminate or are otherwise surrendered, cancelled,canceled, forfeited or repurchased without having been fully exercised or resulting in any common stock being issued plus (3) an annual increase, to be added on the first day of each fiscal year, equalwere carried over to the lowest2014 Plan. Stock options granted under the 2009 Plan are exercisable for a period of 1,102,362 sharesten years from the date of grant. There were approximately 0.1 million fully vested stock options outstanding under the Company’s common stock, 4%2009 Plan as of the number of shares of the Company’s common stock outstanding on the first day of the applicable fiscal year and an amount determined by the Company’s Board. On January 1, 2016,December 31, 2021.
Out-of-Plan Inducement Grants
From time to time, the Company increasedhas granted equity awards to its newly hired employees, including executives, in accordance with the numberNasdaq Stock Market LLC ("Nasdaq") employment inducement grant exemption (Nasdaq Listing Rule 5635(c)(4)). Such grants are made outside of shares reserved for issuance under the 2014 Plan by 786,431 shares. As of December 31, 2016, the total number of shares of common stock available for issuance under the 2014 Plan was 1,088,303.
The Company’s employees, officers, directors, consultants and advisors are eligible to receive awards under the 2014 Plan. However, incentive stock options may only be granted to the Company’s employees.
Inducement Grants
On September 20, 2016, in connection with the Acquisition, the Company granted stock options to purchase 650,000 shares of the Company's common stock. The grants were made in the form of inducement equity awards outside the 2014 Plan in accordance with NASDAQ Listing Rule 5635(c)(4).
These stock options were granted with an effective grant date of September 20, 2016 and an exercise price of $3.37 per share (the closing price per share of the Company's common stock on September 20, 2016) as an inducement to each recipient in connection with his employment. The inducement equity awards were approved and recommended by the Company's Compensation Committee, approved by the Board and were madeact as an inducement material to each recipient'sthe employee's acceptance of employment with the Company in accordance with NASDAQ Listing Rule 5635(c)(4).
EachCompany. There were approximately 2.8 million stock options outstanding which were granted as employment inducement awards outside of the inducement grants expires on the day preceding the tenth anniversary2014 Plan as of the grant date and vests over four years, with 25% of the original number of shares subject to the option vesting on the one year anniversary of the date of grant of the option and an additional 6.25% of the shares subject to the option vesting at the end of each successive three-month periodDecember 31, 2021.
Stock Options
The following the one -year anniversary of the date of grant of the option, subject to the recipient's continued service with the Company through the applicable vesting dates.
Atable sets forth a summary of the Company’s total stock option activity, including awards granted under the 2014 Plan and related information follows:2009 Plan and inducement grants made outside of stockholder approved plans, for the years ended December 31, 2021, 2020 and 2019:

F-25

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Number of Shares under Option
(in thousands)
Weighted-Average
Exercise Price
Weighted-Average Remaining
Contractual 
Life
(in years)
Aggregate
Intrinsic
Value
(in thousands)
Outstanding at December 31, 20183,942 $2.129.14$57 
Granted3,986 $1.02
Exercised(90)$1.10
Canceled or forfeited(1,602)$1.78
Outstanding at December 31, 20196,236 $1.528.83$358 
Granted4,044 $0.87
Exercised(12)$1.13
Canceled or forfeited(121)$1.04
Outstanding at December 31, 202010,147 $1.268.50$3,160 
Granted8,273 $3.32
Exercised(34)$1.23
Canceled or forfeited(2,683)$3.70
Outstanding at December 31, 202115,703 $1.938.03$82 
Exercisable at December 31, 20217,562 $1.657.41$59 
 Shares 
Weighted-Average
Exercise Price
 
Remaining
Contractual Life
(in years)
Aggregate
Intrinsic
Value
(in thousands)
Outstanding at December 31, 20151,803,574
 $6.28
 7.78$1,540
Granted1,747,495
 1.69
   
Exercised(656,532) 0.41
   
Cancelled or forfeited(870,069) 5.86
   
Outstanding at December 31, 20162,024,468
 $4.41
 8.73$841
Exercisable at December 31, 20161,139,514
 $5.09
 8.08$779
Vested and expected to vest at December 31, 2016 (1)1,879,868
 $4.49
 8.66$834
(1)RepresentsThe Company recognized share-based compensation expense of $5.1 million for the numberyear ended 2021. The stock option related expenses were$4.6 million, $1.8 millionand$1.2 millionfor the years ended December 31, 2021, 2020 and 2019, respectively. The RSU related expense was$0.5 million for the year ended December 31, 2021. The Company did not record RSU related expenses for the years ended December 31, 2020 and 2019. As of vestedDecember 31, 2021, there was $10.4 million of total unrecognized compensation cost related to non-vested stock options pluswhich the numberCompany expects to recognize over a weighted-average period of unvested2.7 years. The weighted-average grant-date fair value of stock options expected to vest.
granted during the year ended December 31, 2021, 2020 and 2019 were $2.16, $0.56 and $1.02, respectively. The total intrinsic value of stock options exercised for the years ended December 31, 2016, 20152021, 2020 and 20142019 was $942,000, $768,000 and $921,000, respectively. The total fair value of employee options vested forde minimis.
For the years ended December 31, 2016, 20152021, 2020 and 2014 was $3.7 million, $1.8 million and $1.3 million, respectively.
Restricted Stock
From time to time, upon approval by2019, the Board, certain employees and advisors have been granted restricted shares of common stock. Certain shares of restricted stock were subject to repurchase rights. Accordingly, the Company recorded the proceeds from the issuance of certain restricted stock as a liability in the consolidated balance sheets. The restricted stock liability was reclassified into stockholders’ equity as the restricted stock vested. A summary of the status of unvested restricted stock as of December 31, 2016 and 2015, and changes during the year ended December 31, 2016 are presented below:
 
Restricted
Stock
 
Weighted-Average
Grant Date
Fair Value
Unvested at December 31, 201541,657
 $11.05
Vested(19,507) 10.62
Unvested at December 31, 201622,150
 $11.43
The Company did not grant restricted stock to non-employees during the year ended December 31, 2016. The Company issued 6,660 shares of restricted stock to non-employees during the year ended December 31, 2015. The non-employee restricted stock is revalued as it vests. There were no shares of non-employee unvested restricted stock outstanding at December 31, 2016. The expense related to the restricted stock granted to non-employees for the years ended December 31, 2016, 2015 and 2014 was $3,000, $45,000 and $58,000, respectively.
Restricted Stock Units
From time to time, upon approval by the Board, certain employees have been granted restricted stock units. A summary of the status of restricted stock units is presented below:
 
Restricted
Stock Units
 
Weighted-Average
Grant Date
Fair Value
Unvested at December 31, 2015150,932
 $2.85
Vested(134,499) 2.83
Cancelled(13,100) 2.76
Unvested at December 31, 20163,333
 $4.09
The Company did not issue any restricted stock units to non-employees during the years ended December 31, 2016 and 2015 .

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Performance-Based Stock Options
The Company has granted stock options to employees and founders of the Company, which contain both performance-based and service-based vesting criteria. Milestone events are specific to the Company’s corporate goals, including but not limited to certain preclinical and clinical development milestones related to the Company’s product candidates. Stock-based compensation expense associated with these performance-based stock options is recognized if the performance condition is considered probable of achievement using management’s best estimates. In 2016, the compensation committee of the Board determined that performance-based milestones were achieved and the Company recorded stock-based compensation of $40,000. There was no expense recorded for performance-based stock options during the year ended December 31, 2015. During the year ended December 31, 2014, management determined that a performance-based milestone was achieved and recorded stock-based compensation expense of $293,000. As of December 31, 2016, there were no performance-based stock options outstanding.
Stock-Based Compensation Expense
Thegrant-date fair value of each stock option granted to employees and directorsoptions was estimated on the date of grantdetermined using the Black-Scholes option-pricing model based on thefollowing weighted-average inputs and assumptions noted in the following table:Black-Scholes option pricing model:
Year ended December 31,
202120202019
Fair market value$3.32$0.87$1.02
Grant exercise price$3.32$0.87$1.02
Expected term (in years)6.06.16.0
Risk-free interest rate0.9%1.3%2.1%
Expected volatility74.6%71.5%78.1%
Dividend yield—%—%—%
15. EMPLOYEE BENEFIT PLANS
 Year Ended December 31,
 2016 2015 2014
Risk-free interest rate1.23-2.38% 1.42-1.92% 1.67-2.02%
Expected dividend yield—% —% —%
Expected term (in years)5.5-6 5.75-6 5.75-6
Expected volatility71.44-73.42% 69.06-74.11% 60.00-69.58%
Volatility
Since the Company has only been publicly traded since February 6, 2014 it does not have relevant historical data to support its expected volatility. As such, the Company has used a weighted-average of expected volatility based on the volatilities of a representative group of publicly traded biopharmaceutical companies. For purposes of identifying representative companies, the Company considered characteristics such as stage of development and area of therapeutic focus. The expected volatility has been determined using a weighted-average of the historical volatilities of the representative group of companies for a period equal to the expected term of the option grant. The Company intends to continue to consistently apply this process using the same similar entities until a sufficient amount of historical information regarding the volatility of the Company’s own share price becomes available or until circumstances change, such that the identified entities are no longer representative companies. In the latter case, more suitable, similar entities whose share prices are publicly available would be utilized in the calculation.
Risk-Free Rate
The risk-free rate is based on the yield curve of U.S. Treasury securities with periods commensurate with the expected term of the options being valued.
Expected Term
The Company uses the “simplified method” to estimate the expected term of stock option grants. Under this approach, the weighted-average expected life is presumed to be the average of the contractual term (ten years) and the vesting term (generally four years) of the Company’s stock options, taking into consideration multiple vesting tranches. The Company utilizes this method due to lack of historical exercise data and the plain-vanilla nature of the Company’s share-based awards.
Dividends
The Company has never paid, and does not anticipate paying, any cash dividends in the foreseeable future, and therefore uses an expected dividend yield of zero in the option-pricing model.
Forfeitures

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

The Company is also required to estimate forfeitures at the time of grant, and revise those estimates in subsequent periods if actual forfeitures differ from its estimates. The Company uses historical data to estimate pre-vesting option forfeitures and record stock-based compensation expense only for those awards that are expected to vest. To the extent that actual forfeitures differ from the Company’s estimates, the difference is recorded as a cumulative adjustment in the period the estimates are revised. Stock-based compensation expense recognized in the consolidated financial statements is based on awards that are ultimately expected to vest.
Using the Black-Scholes option-pricing model, the weighted-average per share grant date fair values of options granted to employees in 2016, 2015 and 2014 were $1.09, $5.60 and $8.68, respectively. The expense related to the options granted to employees for the years ended December 31, 2016, 2015 and 2014 were $3.3 million, $2.0 million and $1.6 million, respectively.
The Company granted 5,000 stock options to non-employees during the year ended December 31, 2016 with an exercise price of $0.28 per share. The Company did not grant stock options to non-employees during the years ended December 31, 2015 and 2014.
The fair value of each non-employee stock option is valued on grant date and revalued as it vests using the Black-Scholes option-pricing model based on assumptions noted in the following table:
 Year Ended December 31,
 2016 2015 2014
Risk-free interest rate1.08-2.38% 1.19-2.26% 1.67-2.04%
Expected dividend yield—% —% —%
Expected option life (years)10 10 10
Expected stock price volatility69.92-92.09% 67.24-92.40% 57.65-80.98%
There were no non-employee stock options outstanding at December 31, 2016. The expense related to the options granted to non-employees for the years ended December 31, 2016, 2015 and 2014 were $0, $168,000 and $504,000, respectively.
As of December 31, 2016, there was $1.8 million of unrecognized stock-based compensation, net of estimated forfeitures, related to unvested stock option grants which is expected to be recognized over a weighted-average period of 2.9 years.
Employee Stock Purchase Plan
On January 21, 2014, the Board adopted theThe Company's 2014 Employee Stock Purchase Plan (“("2014 ESPP”ESPP"), which was adopted by its board of directors in December 2013 and subsequently approved by the Company'sits stockholders andin January 2014. The 2014 ESPP became effective uponimmediately prior to the closing of the Company’sCompany's IPO onin February 6, 2014. The 2014 ESPP authorizes theand established an initial issuancereserve of up to a total of 157,4800.2 million shares of the Company’sCompany's common stock for issuance to participating employees. The first offering period underAt the 2014 ESPP opened on September 15, 2015 and closed on March 14, 2016. On March 14, 2016,Annual Meeting of the Company issued and sold 20,760 shares of its common stock pursuantCompany's stockholders in May 2021, the Company's stockholders approved an amendment to the 2014 ESPP at a purchase pricethat increased by 2.3 million the number of $0.31 per share. The second offering periodshares of
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common stock reserved for issuance under the 2014 ESPP opened on March 15, 2016 and closed on September 14, 2016. On September 14, 2016 the Company issued and sold 68,111 sharesESPP. The purpose of its common stock pursuant to the 2014 ESPP is to enhance employee interest in the success and progress of the Company by encouraging employee ownership of common stock of the Company. The 2014 ESPP provides employees with the opportunity to purchase shares of common stock at a purchase15% discount to the market price of $0.42 per share. The third offering period under the 2014 ESPP opened on September 15, 2016.through payroll deductions or lump sum cash investments. The Company has estimatedestimates the number of shares to be issued at the end of the thirdan offering period and recognizes expense over the requisite service period. The Company recognized $18,000 duringShares of the year ended December 31, 2016 relatedcommon stock issued and sold pursuant to the 2014 ESPP.
AccelerationESPP are shown on the consolidated statements of Equity Awards
In connection with the closing of the Acquisition, certain officers of the Company were terminated and entered into separation agreements with the Company. Under the separation agreements, the Company acceleratedchanges in full the vesting of all of their outstandingstockholders' equity awards consistent with their existing employment agreements. As a result of the acceleration, the Company recognized $1.7 million of stock-based compensation expense. In addition, the Company provided that all stock options granted to Dr. Celniker under the Company’s 2009 Plan shall continue to be exercisable based on her continued service as a non-employee member of the Board. As a result of this modification, the Company recorded $0.1 million of stock-based compensation expense.

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

13. Income Taxes
The Company's pre-tax income (loss) is comprised of the following components (in thousands):
 Year Ended December 31,
 2016 2015 2014
Pre-tax income (loss):     
     U.S.$3,981
 $(33,452) $(34,156)
     Canada(2,085) 
 
          Total pre-tax income (loss)$1,896
 $(33,452) $(34,156)
The Company's tax provision is comprised of the following components (in thousands):
 Year Ended December 31,
 2016 2015 2014
Current tax provision:     
     Federal$2
 $
 $
     State
 
 
     Foreign
 
 
          Total current provision2
 
 
Deferred tax provision:     
     Federal3
 
 
     State
 
 
     Foreign
 
 
          Total deferred provision3
 
 
Total tax provision$5
 $
 $
A reconciliation of the expected income tax expense computed using the federal statutory income tax rate to the Company’s effective income tax rate was as follows:
 Year Ended December 31,
 2016 2015 2014
Income tax benefit computed at federal statutory tax rate34.0 % 34.0 % 34.0 %
Impact of foreign rate differential7.7
 
 
State taxes, net of federal benefit18.8
 5.6
 5.1
NOL write off14.4
 
 
Stock option cancellations49.6
 
 
Transaction costs33.6
 
 
Contingent consideration(15.7) 
 
General business credits and other credits(25.0) 1.8
 1.3
Permanent differences5.3
 2.4
 (1.3)
Change in valuation allowance(122.4) (43.8) (39.1)
Total0.3 %  %  %
The Company has incurred NOLs from inception. At December 31, 2016, the Company has U.S. federal and state NOL carryforwards of $111.4 million and $110.6 million, respectively, available to reduce future taxable income, that expire beginning in 2031 through 2035. The Company also had federal and state research and development tax credit carryforwards of $1.9 million and $1.1 million, respectively, available to reduce future tax liabilities that expire beginning in 2025 through 2036. Included in the federal and state net operating losses are deductions attributable to excess tax benefits from the exercise of stock options of $0.8 million. The tax benefits attributable to these deductions are credited directly to additional paid-in capital when realized.(deficit). As of December 31, 2016,2021, there were 2.3 million shares of common stock available for sale under the Company also has non-capital loss carry forwards available to offset future taxable income of $7.8 million for Canadian federal tax purposes, of which $5.3 million expire in 2035 and $2.5 million expire in 2036. As of December 31, 2016, the Company also has $2.9 million of Canadian scientific research and experimental development expense carry forwards available to offset future taxable income as well as $723,000 of Canadian federal and provincial

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

investment tax credit carry forwards available to offset future income taxes. The investment tax credits expire beginning in 2032 through 2036.
Under Section 382 of the Internal Revenue Code of 1986 and comparable provisions of state, local and foreign tax laws, if a corporation undergoes an “ownership change,” generally defined as a greater than 50% change by value in its equity ownership over a three year period, the corporation’s ability to use its pre-change NOL carryforwards and other pre-change tax attributes, such as research and development tax credits, to reduce its post-change income may be limited. We have determined that it is more likely than not that our net operating and tax credit amounts disclosed are subject to a material limitation under Section 382.
The Company’s deferred tax assets and liabilities consist of the following (in thousands):
 December 31,
 2016 2015
Deferred tax assets:   
Net operating loss carryforwards$45,488
 $46,749
Research and development credit carryforwards3,355
 2,462
Accruals and other2,079
 1,385
Capitalized license and organization costs61
 66
Capitalized start-up costs246
 278
Depreciation
 21
Total gross deferred tax asset51,229
 50,961
Deferred tax liabilities:   
IPR&D(16,335) 
Property and equipment(189) 
Total gross deferred tax liabilities(16,524) 
Valuation allowance(51,040) (50,961)
Net deferred tax liability$(16,335) $
As required by ASC 740, Income Taxes (“ASC 740”), management of the Company has evaluated the positive and negative evidence bearing upon the realizability of its deferred tax assets, which are composed principally of NOL carryforwards and research and development credit carryforwards. Management has determined that it is more likely than not that the Company will not recognize the benefits of its federal and state deferred tax assets, and, as a result, a valuation allowance of $51.0 million and $51.0 million has been established at December 31, 2016 and 2015, respectively. The change in the valuation allowance was $79,000 for the year ended December 31, 2016.2014 ESPP. The Company has not, as yet, conductedsold a studyde minimis number of its research and development credit carryforwards. Such a study may result in an adjustment toshares under the Company’s research and development credit carryforwards; however, until a study is completed and any adjustment is known, no amount is being presented as an uncertain tax position. A full valuation allowance has been provided against the Company’s research and development credits, and, if an adjustment is required, this adjustment would be offset by an adjustment to the valuation allowance. Thus, there would be no impact to the consolidated balance sheets or consolidated statements of operations and comprehensive income (loss) if an adjustment were required.
The Company applies the accounting guidance in ASC 740 related to accountingESPP for uncertainty in income taxes. The Company’s reserves related to taxes are based on a determination of whether, and how much of, a tax benefit taken by the Company in its tax filings or positions is more likely than not to be realized following resolution of any potential contingencies present related to the tax benefit. As of December 31, 2016 and 2015, the Company had no unrecognized tax benefits. The Company recognizes interest and penalties related to uncertain tax positions in income tax expense.
The Company files income tax returns in the U.S., certain state and Canadian tax jurisdictions. Since the Company is in a loss carryforward position, the Company is generally subject to examination by the U.S., certain state and Canadian income tax authorities for all tax years in which a loss carryforward is available. There are currently no audits in process in any of its tax filing jurisdictions.

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

14. Related-Party Transaction
The Company leases a manufacturing, laboratory, and office facility in Winnipeg, Manitoba, from an affiliate of a director of the Company, under a five-year renewable lease through September 2020 with a right to renew the lease for one subsequent five-year term. Rent expense was $86,000 for the period beginning on the Acquisition Date through December 31, 2016.
The Company leases an office facility in Toronto, Ontario from an affiliate of a director of the Company. The lease is on a month-to-month basis unless terminated by either party by giving the requisite notice. Rent expense for this facility was $5,000 for the period beginning on the Acquisition Date through December 31, 2016.
The Company pays fees, under an intellectual property license agreement, to Protoden, a company owned by Clairmark, an affiliate of a director of the Company, under an intellectual property licensing agreement. Pursuant to the agreement, the Company has an exclusive, perpetual, irrevocable and non-royalty bearing license, with the right to sublicense, under certain patents and technology to make, use and sell products that utilize such patents and technology. The annual fee is $100,000. Upon expiration of the term, the licenses granted to the Company will require no further payments to Protoden. During the period from the Acquisition Date to December 31, 2016, $28,000 was paid to this related party.
In connection with the forgiveness of certain debt held by Viventia immediately preceding the Acquisition, the Company irrevocably assigned and set over the right to receive up to $814,000 in the form of research and development investment tax credits to and in favor of Clairmark, an affiliate of a director of the Company. In October 2016, the Company received $697,000 in research and development investment tax credits and in November 2016, the Company remitted the same amount to Clairmark. As of December 31, 2016, $114,000 is included in current liabilities as due to related party on the accompanying consolidated balance sheets.
15. Defined Contribution Benefit Plan
The Company sponsors a 401(k) retirement plan, in which substantially all of its full-time U.S. employees are eligible to participate. Participants may contribute a percentage of their annual compensation to this plan, subject to statutory limitations. The Company made matching contributions of $62,000 to this plan during the year ended December 31, 2015. The Company did not provide any contributions to this plan during the years ended December 31, 20162021, 2020 and 2014. Viventia sponsored2019, respectively.
Defined Contribution Plans
United States - 401(k) Plan
The Company maintains a 401(k) defined contribution retirement plan forwhich covers all of its U.S.-basedUS employees. ParticipantsEmployees are eligible to participate on the first of the month following their date of hire. Under the 401(k) plan, participating employees may contribute a percentagedefer up to 100% of their annual compensation to this plan,pre-tax salary, subject to certain statutory limitations. Employee contributions vest immediately. The plan allows for a discretionary match per participating employee up to a maximum of $4,000 per year. The Company made matching contributionscontributed a de minimis amount for each of $8,000 for the period from the Acquisition Date throughthree years ended December 31, 2016 to this plan.2021, 2020 and 2019, respectively.

Canada - Defined Contribution Plan
The Company maintains a defined contribution plan for its Canadian employees. Participants may contribute a percentage of their annual compensation to this plan, subject to statutory limitations. The Company contributes up to the first 4% of eligible compensation for its Canadian-based employees to the retirement plan. The Company made contributionscontributed a de minimis amount for each of $14,000 for the period from the Acquisition Date throughthree years ended December 31, 2016 to this plan.2021, 2020 and 2019, respectively.
16. Reduction in WorkforceINCOME TAXES
On June 16, 2016,The following table sets forth the Board approved a strategic restructuringcomponents of the Company to eliminate a portionCompany's loss before income taxes by country (in thousands):
 Year Ended December 31,
 202120202019
Country
United States$(32,757)$(35,529)$(27,468)
Canada24,148 14,577 (80,032)
     Total Loss Before Income Taxes$(8,609)$(20,952)$(107,500)
The Company's tax benefit (provision) is comprised of the Company’s workforce in order to preserve the Company’s resources as it determined its future strategic plans. following components (in thousands):
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 Year Ended December 31,
 202120202019
Current Tax Provision
     Federal$— $— $— 
     State— — — 
     Foreign(286)(1,445)— 
           Total current (provision)$(286)$(1,445)$— 
Deferred tax provision
     Federal$— $— $— 
     State— — — 
     Foreign8,559 — — 
           Total deferred benefit (provision)$8,559 $— $— 
Total Tax Benefit (Provision)$8,273 $(1,445)$ 

The Company estimated total restructuring costs of $0.6 million in connection with this action, which included severance, benefits and related costs in accordance with the Company's severancedid not record current or deferred income tax or benefit plan. On September 20, 2016, in connection with the Acquisition, the Company eliminated additional positions and recorded additional restructuring charges of $1.3 million. The Company recorded restructuring charges of $1.1 million in research and development expenses and $0.8 million in general and administrative expenses in the consolidated statements of operations and comprehensive income (loss) for the year ended December 31, 2016.2019.

ELEVEN BIOTHERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

The table below provides a roll-forward of the reduction in workforce liability (in thousands):
   
 
 Balance as of January 1, 2016$
 Charges1,940
 Payments(1,909)
 Balance as of December 31, 2016$31
17. Selected Quarterly Financial Data (Unaudited)
The following table contains quarterly financial informationsets forth a reconciliation of the statutory United States federal income tax rate to the Company’s effective income tax rate:
 Year ended December 31,
 202120202019
United States federal statutory income tax rate21.0 %21.0 %21.0 %
Impact of foreign rate differential(15.9)(4.2)4.4 
State taxes, net of federal benefit2.3 2.0 0.6 
Stock option cancellations(1.1)(0.2)— 
Contingent consideration178.2 14.4 (18.0)
General business credits and other credits2.4 6.6 0.4 
Permanent differences(1.4)0.2 — 
Other(13.8)(2.1)(0.5)
Foreign taxes(3.3)(6.9)— 
Change in valuation allowance(72.3)(37.7)(7.9)
Effective Income Tax Rate96.1 %(6.9)% %
The following table sets forth the tax effects of temporary differences that gave rise to significant portions of the Company's deferred tax assets and liabilities (in thousands):
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December 31,
202120202019
Deferred tax assets:
     NOL carryforwards$63,381 $57,935 $50,727 
     R&D credit carryforwards4,316 3,787 4,385 
     Accruals and other4,058 3,811 2,464 
     Capitalized start-up costs53 70 91 
     Other41 28 57 
          Gross deferred tax assets71,849 65,631 57,724 
Deferred tax liabilities:
     IPR&D(3,969)(12,528)(12,528)
          Gross deferred tax liabilities(3,969)(12,528)(12,528)
          Valuation allowance(71,849)(65,631)(57,724)
               Net Deferred Tax Liability$(3,969)$(12,528)$(12,528)
In assessing the realizability of the Company's deferred tax assets, management considers all relevant positive and negative evidence in determining whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The realization of deferred tax assets is dependent on several factors, including the generation of sufficient taxable income prior to the expiration of the NOL and R&D credit carryforwards. The Company has generated NOLs since its inception, and management believes that it is more likely than not that the Company's deferred tax assets will not be realized. As a result, valuation allowances of $71.8 million, $65.6 million and $57.7 million have been established as of December 31, 2021, 2020 and 2019, respectively.The $6.2 million increase in the valuation allowance was attributable to the NOL for the year ended December 31, 2021.
The net deferred tax liability of $4.0 million primarily relates to the potential future impairments or amortization associated with IPR&D intangible assets, which is not deductible for tax purposes and cannot be considered as a source of income to realize deferred tax assets. As a result, the Company recorded the deferred tax liability with an offset to goodwill.
The following table summarizes the Company's NOL and R&D and other credit carryforwards in the United States and Canada as of December 31, 2021 (in millions):
AmountExpiration Beginning inThrough
United States:
     Federal NOL carryforwards - indefinite$101.1 NoneNone
     Federal NOL carryforwards$118.9 20302038
     State NOL carryforwards$138.4 20302040
     Federal R&D credit carryforwards$2.5 20272040
     State R&D credit carryforwards$0.8 20272040
Canada:
     Federal non-capital loss carryforwards$31.2 20352040
     Federal scientific research and experimental development
          expense carryforwards
$5.1 20322040
     Federal and provincial investment tax credit carryforwards$1.2 20322040
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Under the Tax Reform Act of 1986 (the "Act'), NOL and R&D credit carryforwards are subject to review and possible adjustment by the Internal Revenue Service, and there are similar provisions in certain state and non-US tax laws. NOL and R&D credit carryforwards may become subject to an annual limitation in the event of certain cumulative changes in the ownership interests of significant shareholders over a three-year period in excess of 50 percent, as defined in Sections 382 and 383 of the Internal Revenue Code, respectively. This could limit the amount of tax attributes that can be utilized to offset future taxable income or tax liabilities. The amount of the annual limitation is determined based on the value of the Company immediately prior to the ownership change. Subsequent ownership changes may further affect the limitation in future years. Management completed a Section 382 study through March 31, 2016 and 2015.determined that it is more likely than not that the Company's NOL carryforwards are subject to a material limitation. Accordingly, the Company reduced its NOL carryforward by $0.8 million. The Company believeshas continued to raise additional equity capital since March 2016 but has not done any additional analysis to determine whether or not ownership changes, as defined in the Act, have occurred, which would result in additional limitations. There could be additional ownership changes in the future that could further limit the amount of NOL carryforwards that the following information reflectsCompany can utilize. The Company has not yet conducted a study of its R&D credit carryforwards. Such a study may result in an adjustment to the Company’s R&D credit carryforwards; however, until a study is completed and any adjustment is known, no amount is being presented as an uncertain tax position. A full valuation allowance has been provided against the Company’s R&D credit carryforwards, and, if an adjustment is required, it would be offset by an adjustment to the valuation allowance.
We assess the impact of various tax reform proposals and modifications to existing tax treaties in all normal recurring adjustments necessaryjurisdictions where we have operations to determine the potential effect on our business and any assumptions we have made about our future taxable income. We cannot predict whether any specific proposals will be enacted, the terms of any such proposals or what effect, if any, such proposals would have on our business if they were to be enacted. Beginning in 2022, the Tax Cuts and Jobs Act of 2017 eliminates the currently available option to deduct research and development expenditures and requires taxpayers to amortize them over five years. The U.S. Congress is considering legislation that would defer the amortization requirement to future periods, however, we have no assurance that the provision will be repealed or otherwise modified.

As of December 31, 2021, the Company had no accrued interest or penalties related to uncertain tax positions and no amounts have been recognized in the Company's consolidated statements of operations. Due to NOL and R&D credit carryforwards that remain unutilized, income tax returns filed in the United States, certain states within the United States and Canadian tax jurisdictions from the Company's inception through 2020 remain subject to examination by the taxing jurisdictions. There are currently no audits in process in any of the Company's tax filing jurisdictions.
17. LICENSE AGREEMENTS
In-License Agreements
License Agreement with Zurich
The Company has a license agreement with the University of Zurich ("Zurich") which grants the Company exclusive license rights, with the right to sublicense, to make, have made, use and sell under certain patents primarily directed to the Company's targeting agent, including an EpCAM chimera and related immunoconjugates and methods of use and manufacture of the same (the “Zurich License Agreement”). These patents cover some key aspects of Vicineum. Upon the Company's receipt of the CRL regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC, the Company became obligated to pay $0.5 million in a milestone payment to Zurich. The Company is also obligated to pay up to a 4% royalty on the net product sales for products covered by or manufactured using a method covered by a valid claim in the Zurich patent rights. Royalties owed to Zurich will be reduced if the total royalty rate owed by the Company to Zurich and any other third party is 10% or greater, provided that the royalty rate to Zurich may not be less than 2% of net sales. The obligation to pay royalties in a particular country expires upon the expiration or termination of the last of the Zurich patent rights that covers the manufacture, use or sale of a product. There is no obligation to pay royalties in a country if there is no valid claim that covers the product or a method of manufacturing the product. The Company recorded an expense of $0.5 million and $0.3 million related to achievement of a development milestone, (the submission of the Company’s BLA with the FDA in December 2020), in the year ended December 31, 2021 and 2020, respectively, and a regulatory milestone, (the Company’s receipt of the CRL from the FDA in August 2021), in the twelve months ended December 31, 2021, respectively.
License Agreement with Micromet
The Company has a License Agreement with Micromet AG ("Micromet"), now part of Amgen, Inc., which grants it nonexclusive rights, with certain sublicense rights, for know-how and patents allowing exploitation of certain single chain antibody products (the “Micromet License Agreement”). These patents cover some key aspects of Vicineum. Under the terms of the Micromet License Agreement, as of December 31, 2021, the Company may be obligated to pay up to €2.4 million in milestone payments for the first product candidate that achieves applicable regulatory and sales-based development milestones (approximately $2.7 million at exchange rates in effect on December 31, 2021). The Company is also required to pay up to a
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3.5% royalty on the net sales for products covered by the agreement, which includes Vicineum. The royalty rate owed to Micromet in a particular country will be reduced to 1.5% if there are no valid claims covering the product in that country. The obligation to pay royalties in a particular country expires upon the later of the expiration date of the last valid claim covering the product and the tenth anniversary of the first commercial sale of the product in such country. Finally, the Company is required to pay to Micromet an annual license maintenance fee of €50,000 (approximately $56,625 at exchange rates in effect as of December 31, 2021), which can be credited towards any royalty payment the Company owes to Micromet. The Company recorded an expense of €0.7 million ($0.9 million) related to achievement of a development milestone in the three months ended December 31, 2020, due to the submission of the Company's BLA for Vicineum with the FDA in December 2020. The Company recorded an expense of €0.5 million ($0.6 million) related to the submission of the MAA to the EMA for Vysyneum™ in the first quarter of 2021. Vysyneum is the proprietary brand name that was conditionally approved by the EMA for oportuzumab monatox in the European Union.
License Agreement with XOMA
The Company has a license agreement with XOMA Ireland Limited ("XOMA") which grants it non-exclusive rights to certain XOMA patent rights and know-how related to certain expression technology, including plasmids, expression strains, plasmid maps and production systems (the “XOMA License Agreement”). These patents and related know-how cover some key aspects of Vicineum. Under the terms of the XOMA License Agreement, the Company is required to pay up to $0.25 million in milestone payments for a fair statementproduct candidate that incorporates know-how under the license and achieves applicable clinical development milestones. Based on current clinical status, the Company anticipates that these milestones may be triggered by Vicineum’s clinical development pathway. The Company is also required to pay a 2.5% royalty on the net sales for products incorporating XOMA’s technology, which includes Vicineum. The Company has the right to reduce the amount of royalties owed to XOMA on a country-by-country basis by the amount of royalties paid to other third parties, provided that the royalty rate to XOMA may not be less than 1.75% of net sales. In addition, the foregoing royalty rates are reduced by 50% with respect to products that are not covered by a valid patent claim in the country of sale. The obligation to pay royalties in a particular country expires upon the later of the information forexpiration date of the periods presented. The operating results for any quarter are not necessarily indicativelast valid claim covering the product and the tenth anniversary of results for any future period.the first commercial sale of the product in such country.
Out-License Agreements
 2016
 
First
Quarter
 
Second
Quarter
 
Third
Quarter *
 
Fourth
Quarter
 Total
 (in thousands, except per share data)
Total revenue$229
 $277
 $28,650
 $825
 $29,981
Total operating expenses6,779
 6,769
 9,120
 4,447
 27,115
Income (loss) from operations(6,550) (6,492) 19,530
 (3,622) 2,866
Net income (loss)(7,574) (6,491) 19,487
 (3,531) 1,891
Net income (loss) per share—basic$(0.39) $(0.33) $0.95
 $(0.15) $0.09
Net income (loss) per share—diluted$(0.39) $(0.33) $0.91
 $(0.15) $0.09
Roche License Agreement

 2015
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 Total
 (in thousands, except per share data)
Total revenue$244
 $114
 $67
 $565
 $990
Total operating expenses7,841
 8,516
 9,426
 10,403
 36,186
Loss from operations(7,597) (8,402) (9,359) (9,838) (35,196)
Net loss(6,524) (6,906) (9,693) (10,329) (33,452)
Net loss per share—basic and diluted$(0.36) $(0.36) $(0.50) $(0.53) $(1.76)

* In the third quarter ofJune 2016, the Company recognized revenue of $29.0 million in connectionentered into the license agreement with Roche (the “Roche License Agreement”), pursuant to which the Company granted Roche an exclusive, worldwide license, including the right to sublicense, to its patent rights and know-how related to the Company’s monoclonal antibody EBI-031 and all other IL-6 anti-IL-6 antagonist monoclonal antibody technology owned by the Company (collectively, the "Roche Licensed Intellectual Property"). Under the Roche License Agreement, Roche is required to continue developing, at its cost, EBI-031 and any other product made from the Roche Licensed Intellectual Property that contains an IL-6 antagonist anti-IL monoclonal antibody (“Roche Licensed Product”) and pursue ongoing patent prosecution, at its cost.
Financial Terms
The Company received from Roche an upfront license fee of $7.5 million in August 2016 upon the effectiveness of the Roche License Agreement following approval by the Company's stockholders, and Roche agreed to pay up to an additional $262.5 million upon the achievement of specified regulatory, development and commercialization milestones with Roche. respect to up to two unrelated indications. Specifically, an aggregate amount of up to $197.5 million is payable to the Company for the achievement of specified milestones with respect to the first indication, consisting of (i) $72.5 million in development milestones, the next of which is $30 million for initiation of the first Phase III clinical trial, (ii) $50 million in regulatory milestones and (iii) $75 million in commercialization milestones. Additional amounts of up to $65 million are payable upon the achievement of specified development and regulatory milestones in a second indication.
In September 2016, Roche paid the Company the first development milestone of $22.5 million as a result of the Investigational New Drug application for EBI-031 becoming effective on or before September 15, 2016. In December 2021, a $20 million milestone was achieved due to Roche initiating a Phase II clinical trial. Management evaluated the milestone under ASC 606 and determined it is probable that a significant revenue reversal will not occur in future periods, which was not the case in the previous quarter. Accordingly, the Company invoiced Roche $20 million with payment terms of 30 days following the achievement of the corresponding milestone event, pursuant to the Roche License Agreement and $20 million was recorded as license revenue and accounts receivables in the fourth quarter of 2021. In January 2022, the payment of $20 million was received.
In addition, the Company incurred $2.5is entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% of net sales of potential future products containing EBI-031 and up to 50% of these rates for net
F-31


sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to the buy-out options of Roche.
Buy-Out Options
The Roche License Agreement provides for 2 “option periods” during which Roche may elect to make a one-time payment to the Company and, in turn, terminate its diligence, milestone and royalty payment obligations under the Roche License Agreement. Specifically, (i) Roche may exercise a buy-out option following the first dosing (“Initiation”) in the first Phase 2 study for a Roche Licensed Product until the day before Initiation of the first Phase 3 study for a Roche Licensed Product, in which case Roche is required to pay the Company $135 million within 30 days after Roche's exercise of such buy-out option and receipt of an invoice from the Company, or (ii) Roche may exercise a buy-out option following the day after Initiation of the first Phase 3 study for a Roche Licensed Product until the day before the acceptance for review by the FDA or other regulatory authority of a BLA or similar application for marketing approval for a Roche Licensed Product in either the United States or in the EU, in which case Roche is required to pay the Company, within 30 days after Roche’s exercise of such buy-out option and receipt of an invoice from the Company, $265 million, which amount would be reduced to $220 million if none of the Company’s patent rights containing a composition of matter claim covering any compound or Roche Licensed Product has issued in the EU.
Termination
Either the Company or Roche may each terminate the Roche License Agreement if the other party breaches any of its material obligations under the agreement and does not cure such breach within a specified cure period. Roche may terminate the Roche License Agreement following effectiveness by providing advance written notice to the Company or by providing written notice if the Company is debarred, disqualified, suspended, excluded, or otherwise declared ineligible from certain federal or state agencies or programs. The Company may terminate the Roche License Agreement if, prior to the first filing of a BLA for a Roche Licensed Product, there is a period of twelve months where Roche is not conducting sufficient development activities with respect to the products made from the Roche Licensed Intellectual Property.
OUS Business Development Partnership Agreements
Qilu License Agreement
On July 30, 2020, the Company and its a wholly-owned subsidiary, Viventia Bio, Inc., entered into an exclusive license agreement with Qilu (the “Qilu License Agreement”) pursuant to which the Company granted Qilu an exclusive, sublicensable, royalty-bearing license, under certain intellectual property owned or exclusively licensed by the Company, to develop, manufacture and commercialize Vicineum (the “Qilu Licensed Product”) for the treatment of NMIBC and other types of cancer (the “Field”) in China, Hong Kong, Macau and Taiwan ("Greater China”). The Company also granted Qilu a non-exclusive, sublicensable, royalty-bearing sublicense, under certain other intellectual property licensed by the Company to develop, manufacture and commercialize the Qilu Licensed Product in Greater China. The Company retains (i) development, and commercialization rights in the rest of the world excluding Greater China, the Middle East and North Africa region ("MENA”) and Turkey and (ii) manufacturing rights with respect to Vicineum in the rest of the world excluding China.
In consideration for the rights granted by the Company, Qilu agreed to pay to the Company a one-time upfront cash payment of $12 million, and milestone payments totaling up to $23 million upon the achievement of certain technology transfer, development and regulatory milestones. All payments were to be inclusive of value-added tax ("VAT"), which can be withheld by Qilu upon payment, and for which future recovery of such taxes may be available.
Qilu also agreed to pay the Company a 12% royalty based upon annual net sales of Qilu Licensed Products in Greater China. The royalties are payable on a Qilu Licensed Product-by-Licensed Product and region-by-region basis commencing on the first commercial sale of a Licensed Product in a region and continuing until the latest of (i) twelve years after the first commercial sale of such Qilu Licensed Product in such region, (ii) the expiration of the last valid patent claim covering or claiming the composition of matter, method of treatment, or method of manufacture of such Qilu Licensed Product in such region, and (iii) the expiration of regulatory or data exclusivity for such Qilu Licensed Product in such region (collectively, the “Royalty Terms”). The royalty rate is subject to reduction under certain circumstances, including when there is no valid claim of a licensed patent that covers a Qilu Licensed Product in a particular region or no data or regulatory exclusivity of a Qilu Licensed Product in a particular region.
Qilu is responsible for all costs related to developing, obtaining regulatory approval of and commercializing the Qilu Licensed Products in the Field in Greater China. Qilu is required to use commercially reasonable efforts to develop, seek regulatory approval for, and commercialize at least one Qilu Licensed Product in the Field in Greater China. A joint development committee was established between the Company and Qilu to coordinate and review the development, manufacturing and commercialization plans with respect to the Qilu Licensed Products in Greater China. The Company and Qilu also executed the terms and conditions of a supply agreement and related quality agreement pursuant to which the Company will manufacture or have manufactured and supply Qilu with all quantities of the Qilu Licensed Product necessary for Qilu to develop and
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commercialize the Qilu Licensed Product in the Field in Greater China until the Company has completed manufacturing technology transfer to Qilu and approval of a Qilu manufactured product by the National Medical Products Administration in China ("NMPA") for the Qilu Licensed Product has been obtained.
The Qilu License Agreement will expire on a Qilu Licensed Product-by-Licensed Product and region-by-region basis on the date of the expiration of all applicable Royalty Terms. Either party may terminate the Qilu License Agreement for the other party’s material breach following a cure period or upon certain insolvency events. Qilu has the right to receive a refund of all amounts paid to the Company in the event the Qilu License Agreement is terminated under certain circumstances. The Qilu License Agreement includes customary representations and warranties, covenants and indemnification obligations for a transaction of this nature.
The Qilu License Agreement is subject to the provisions of Accounting Standards Codification 606, Revenue from Contracts with Customers ("ASC 606"), which was adopted effective January 1, 2018. In 2020, the initial transaction price was estimated to be $11.2 million and was based on the up-front fixed consideration of $12 million less amounts withheld for VAT. The Company concluded that its agreements under the Qilu License Agreement represented one bundled performance obligation that had been achieved as of September 30, 2020. As such, $11.2 million of the total $11.2 million transaction costsprice was considered earned and the Company recorded $11.2 million of revenue during the three-month period ended September 30, 2020.
The Investigational New Drug application for Vicineum submitted by Qilu to the Center for Drug Evaluation of the NMPA was accepted for review in January 2021 and approved in March 2021, resulting in a $3 million milestone payment from Qilu, the first milestone payment out of the $23 million in potential milestone payments. The Company recorded $2.8 million (net of VAT) as license revenue during the three-month period ended March 31, 2021. The Company received the payment in 2021.
In June 2021, the Qilu License Agreement was recognized by Shandong Province, Bureau of Science and Technology as a "Technology Transfer". An agreement that is designated as a Technology Transfer shall be entitled to a tax incentive of VAT recovery. As such, the Company recorded $0.9 million of revenue during the three months ended June 30, 2021 for additional purchase price resulting from Qilu's obligation to pay Sesen an amount equal to its recovery of VAT. The Company will not be subject to VAT on future potential milestone payments from Qilu.
MENA License Agreement
On November 30, 2020, the Company entered into a license agreement with a third party pursuant to which the Company granted an exclusive, sublicensable, royalty-bearing license, under certain intellectual property owned or exclusively licensed by the Company, to commercialize Vicineum in the MENA region, ("MENA License Agreement"). The Company retains development and commercialization rights in the rest of the world excluding Greater China, Turkey and MENA. In consideration for the rights granted by the Company, the counterparty to the MENA License Agreement agreed to pay to the Company an upfront payment of $3 million, which would be subject to certain tax withholdings. In addition, the counterparty agreed to pay to the Company milestone payments upon the achievement of certain sales-based milestones as well as a royalty based upon annual net sales in the MENA region for the term of the MENA License Agreement.
The MENA License Agreement is subject to the provisions of ASC 606. The initial transaction price was estimated by management as $1.5 million as of December 31, 2020 and was based on 50% of the upfront payment, or the amount not subject to a refund if certain regulatory approvals in MENA are not obtained. The remaining upfront payment ($1.5 million) is subject to a refund if certain regulatory approvals in MENA are not obtained and recorded as long-term deferred revenue as of December 31, 2021. The Company also concluded that its agreements under the MENA License Agreement represented two distinct performance obligations, the first of which is a bundled performance obligation related to the delivery of the license, associated know-how and certain documentation. The second performance obligation relates to the delivery of manufactured product. The first performance obligation (delivery of the license, associated know-how and certain documentation) was achieved during the quarter ended March 31, 2021; as such, revenue of $1.5 million has been recognized. Additional variable consideration, determined to be allocated entirely to the bundled license performance obligation, to be paid to the Company based upon future sales levels will be recognized as revenue when the underlying sales of the licensed product occurs. In addition, variable consideration related to any future delivery of product will be recognized in future periods as the product is delivered. As of December 31, 2021, none of these additional amounts were reasonably certain to be achieved due to the nature and timing of the underlying activities.
EIP License Agreement
On August 5, 2021, the Company entered into an exclusive license agreement with EİP Eczacıbaşı İlaç Pazarlama A.Ş., (“EIP”) pursuant to which it granted EIP an exclusive license to register and commercialize Vicineum for the treatment of BCG-unresponsive NMIBC in Turkey and Northern Cyprus (the “EIP License Agreement). Under the terms of the License Agreement, the Company is entitled to receive an upfront payment of $1.5 million. The Company is in the process of amending the license agreement to defer payment of the upfront payment to coincide with the Acquisitionpotential FDA approval of Viventia.Vicineum. The

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Company is eligible to receive additional regulatory and commercial milestone payments of $2.0 million and is also entitled to receive a 30% royalty on net sales in Turkey and Northern Cyprus. The EIP License Agreement is subject to the provisions of ASC 606 and as of December 31, 2021, none of these amounts have been received by the Company. No initial transaction price was estimated by management as of December 31, 2021, as the upfront payment is subject to a refund if certain regulatory approvals in the US are not obtained. The Company also concluded that its promises under the EIP License Agreement represented two distinct performance obligations, the first of which is a bundled performance obligation related to the delivery of the license and associated know-how. The second performance obligation relates to the delivery of manufactured product. Additional variable consideration, determined to be allocated entirely to the bundled license performance obligation, to be paid to the Company based upon future regulatory milestones will be recognized as achievement of those milestones. In addition, variable consideration related to any future delivery of product will be recognized in future periods as the product is delivered. As of December 31, 2021, none of these additional amounts were reasonably certain to be achieved due to the nature and timing of the underlying activities.
18. RELATED-PARTY TRANSACTIONS
The Company leases its facility in Winnipeg, Manitoba from an affiliate of Leslie L. Dan, a director of the Company until his retirement in July 2019. For each of the years ended December 31, 2021, 2020 and 2019, the Company paid $0.3 million of rent, which includes the related operating expenses.
The Company pays fees under an intellectual property license agreement to Protoden Technologies Inc. ("Protoden"), a company owned by Clairmark, an affiliate of Mr. Dan. Pursuant to the agreement, the Company has an exclusive, perpetual, irrevocable and non-royalty bearing license, with the right to sublicense, to certain patents and technology to make, use and sell products that utilize such patents and technology. The annual fee is $0.1 million. Upon expiration of the term on December 31, 2024, the licenses granted to the Company will require no further payments to Protoden. For each of the years ended December 31, 2021, 2020 and 2019, the Company paid $0.1 million under this license agreement.
Due to his retirement in July 2019, Mr. Dan was not deemed a related party during the twelve-month period ended December 31, 2020 and 2021; as such, only payments made through the nine month period ended September 30, 2019 are considered payments to a related party.
19. RESTRUCTURING AND RELATED ACTIVITIES
On August 30, 2021, the Company approved a restructuring plan to reduce operating expenses and better align its workforce with the needs of its business following receipt of the CRL from the FDA regarding the BLA for Vicineum for the treatment of BCG-unresponsive NMIBC (the “Restructuring Plan”).
The Restructuring Plan included a reduction in the Company’s workforce by 18 positions (or approximately 35% of the Company’s workforce as of the date of the Restructuring Plan), as well as additional cost-saving initiatives intended to preserve capital while the Company continues development of Vicineum. The following is a summary of accrued restructuring costs related to the Restructuring Plan:
December 31,
2021
(in thousands)
Severance and benefits costs$2,792 
Contract termination costs2,736
Other restructuring costs— 
Total restructuring costs$5,528 
Cash payments(4,031)
Balance at December 31, 2021$1,497 
Restructuring costs related to the Restructuring Plan were recorded in operating expenses in the Company’s Consolidated Statements of Operations and Comprehensive Loss in the year ended December 31, 2021. The Company expects that substantially all of the accrued restructuring costs as of December 31, 2021 will be paid in cash by the end of September 2022.
20. SUBSEQUENT EVENTS
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On January 7, 2022, the FDA granted the Company’s request for a Type C Meeting (“Type C Meeting”) to discuss the study protocol for an additional Phase 3 clinical trial that the Company plans to conduct for potential resubmission of a BLA for Vicineum™ for the treatment of BCG-unresponsive NMIBC. The Type C Meeting has been scheduled for March 28, 2022.
On January 24, 2022, the Company received written notice (the “Notice”) from Nasdaq indicating that the Company is not in compliance with the $1.00 minimum bid price requirement for continued listing on The Nasdaq Global Market, as set forth in Nasdaq Listing Rule 5450(a)(1). The Notice has no effect at this time on the listing of the Company’s common stock (the “Common Stock”), which continues to trade on The Nasdaq Global Market under the symbol “SESN”. In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company has a period of 180 calendar days, or until July 25, 2022, to regain compliance with the minimum bid price requirement. To regain compliance, the closing bid price of the Company’s Common Stock must meet or exceed $1.00 per share for a minimum of ten consecutive business days during this 180-day period.
If the Company is not in compliance by July 25, 2022, the Company may qualify for a second 180 calendar day compliance period. If the Company does not qualify for, or fail to regain, compliance during the second compliance period, then Nasdaq will notify the Company of its determination to delist the Company’s common stock, at which point the Company would have an opportunity to appeal the delisting determination to a Nasdaq hearings panel.
The Company intends to actively monitor the closing bid price of the Company’s common stock and may, if appropriate, consider implementing available options to regain compliance with the minimum bid price requirement under the Nasdaq Listing Rules.
As previously announced, the Company’s Board of Directors (the “Board”) initiated an independent internal review conducted by outside counsel with the assistance of subject matter experts focusing on the conduct of, and data generated from, the clinical trials of Vicineum for the treatment of BCG-unresponsive NMIBC, and the overall safety of Vicineum (the “Review”).The Review took place over the course of five months, involved full cooperation from the Company’s management team, a review of more than 600,000 documents, and 39 interviews of current and former employees and consultants.It is now complete.As a result of the Review, the Board continues to fully support the Company’s current management team and believes no changes or amendments relating to the Company’s prior disclosures to the SEC or the FDA relating to Vicineum, the Phase 3 VISTA trial for Vicineum for the treatment of BCG-unresponsive NMIBC, or the BLA for Vicineum are warranted.The Company intends to work cooperatively with the FDA in preparing for an additional Phase 3 clinical trial for Vicineum.


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