UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

FORM 10-K

(Mark One)

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 20212022

OR

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO

Commission File Number 001-39402

ANNEXON, INC.

(Exact name of Registrant as specified in its Charter)

Delaware

27-5414423

(State or other jurisdiction of

incorporation or organization)

(I.R.S. Employer

Identification No.)

1400 Sierra Point Parkway, Bldg C, Suite 200

Brisbane, California94005

(Address of principal executive offices including zip code)

Registrant’s telephone number, including area code: (650) (650) 822-5500

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of each exchange on which registered

Common stock,Stock, par value $0.001 per share

ANNX

The Nasdaq Stock 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. Yes No

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes 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. Yes No

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yes No

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer

Accelerated filer

Non-accelerated filer

Smaller reporting company

Emerging growth company

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.

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the Registrant included in the filing reflect the correction of an error to previously issued financial statements.

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the Registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes No

As of June 30, 2021,2022, the aggregate market value of sharesthe Registrant’s Common Stock held by non-affiliates of the Registrant (based uponon the closing sale pricessales price of such shares on the Nasdaq Global Select Market on June 30, 2021)2022) was approximately $750$125 million. For purposes of calculating the aggregate market value of shares held by non-affiliates, we have assumed that all outstanding shares are held by non-affiliates, except for shares held by each of our executive officers, directors and 10% or greater stockholders. This calculation does not reflect a determination that such parties are affiliates for any other purpose.


The number of shares of the Registrant’s Common Stock outstanding as of February 25, 2022March 1, 2023 was 38,563,565.50,493,255. This number does not include 24,696,206 shares of Common Stock issuable upon the exercise of pre-funded warrants (which are immediately exercisable at an exercise price of $0.001 per share of Common Stock, subject to beneficial ownership limitations) sold in the Registrant’s private placement on July 11, 2022. See Note 6—Stockholders’ Equity to the Registrant’s audited consolidated financial statements.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Registrant’s definitive proxy statement relating to the 20222023 Annual Meeting of Stockholders, 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, 2021,2022, are incorporated by reference into Part III of this Annual Report on Form 10-K.


Table of Contents

Page

PART I

Item 1.

Business

61

Item 1A.

Risk Factors

4645

Item 1B.

Unresolved Staff Comments

95

Item 2.

Properties

95

Item 3.

Legal Proceedings

95

Item 4.

Mine Safety Disclosures

95

PART II

Item 5.

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

96

Item 6.

[Reserved]

96

Item 7.

Management’s Discussion and Analysis of Financial Condition and Results of Operations

97

Item 7A.

Quantitative and Qualitative Disclosures About Market Risk

105106

Item 8.

Financial Statements and Supplementary Data

107

Item 9.

Changes in and Disagreements With Accountants on Accounting and Financial Disclosure

132130

Item 9A.

Controls and Procedures

132130

Item 9B.

Other Information

133131

Item 9C.

Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

133131

PART III

Item 10.

Directors, Executive Officers and Corporate Governance

134132

Item 11.

Executive Compensation

134132

Item 12.

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

134132

Item 13.

Certain Relationships and Related Transactions, and Director Independence

134132

Item 14.

Principal Accountant Fees and Services

134132

PART IV

Item 15.

Exhibits, Financial Statement Schedules

135133

Item 1616.

Form 10-K Summary

137135



EXPLANATORY NOTE

Annexon, Inc., or the Company, was previously an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act, and a “non-accelerated filer” and “smaller reporting company,” each as defined under Rule 12b-2 under the Securities Exchange Act of 1934, as amended, or the Exchange Act.

As of December 31, 2021, the Company ceased to qualify as an emerging growth company and was deemed to be a “large accelerated filer,” as defined under Rule 12b-2 under the Exchange Act.

Although the Company is no longer an emerging growth company or a smaller reporting company, and on the cover page of this Annual Report on Form 10-K, the Company has checked the box indicating its status as a large accelerated filer, the Company remains eligible to take advantage of smaller reporting company reporting requirements through this Annual Report on Form 10-K, including reduced disclosure obligations regarding executive compensation that will be incorporated in this Annual Report on Form 10-K by reference to the information set forth in its proxy statement for its 2022 Annual Meeting of Stockholders, which will be filed with the U.S. Securities and Exchange Commission no later than 120 days after December 31, 2021.  The Company has elected to take advantage of certain of the reduced disclosure obligations available to smaller reporting companies in this Annual Report on Form 10-K.  



SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains forward-looking statements about us and our industry 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 financial condition, future operations, projected costs, prospects, plans, objectives of management and expected market growth, are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “aim,” “anticipate,” “assume,” “believe,” “contemplate,” “continue,” “could,” “design,” “due,” “estimate,” “expect,” “goal,” “intend,” “may,” “objective,” “plan,” “positioned,” “potential,” “predict,” “seek,” “should,” “target,” “will,” “would” and other similar expressions that are predictions of or indicate future events and future trends, or the negative of these terms or other comparable terminology. These forward-looking statements include, but are not limited to, statements about:

our expectations regarding the potential market size and size of the potential patient populations for our product candidates and any future product candidates, if approved for commercial use;

• our clinical and regulatory development plans;

• our expectations with regard to the results of our clinical studies, preclinical studies and research and development programs, including the timing and availability of data from such studies;

• the timing of commencement of future nonclinical studies and clinical trials and research and development programs;

• our ability to acquire, discover, develop and advance product candidates into, and successfully complete, clinical trials;

• our intentions and our ability to establish collaborations and/or partnerships;

• the timing or likelihood of regulatory filings and approvals for our product candidates;

• our commercialization, marketing and manufacturing capabilities and expectations;

• our intentions with respect to the commercialization of our product candidates;

• the pricing and reimbursement of our product candidates, if approved;

• the potential effects of COVID-19 on our preclinical and clinical programs and business;

• the implementation of our business model and strategic plans for our business and product candidates, including additional indications for which we may pursue;

• the scope of protection we are able to establish and maintain for intellectual property rights covering our product candidates, including the projected terms of patent protection;

• estimates of our expenses, future revenue, capital requirements, our needs for additional financing and our ability to obtain additional capital;

• the potential future sales of our common stock under our at-the-market offering program;

• our future financial or operating performance; and

• developments and projections relating to our competitors and our industry, including competing products.

our expectations regarding the potential market size and size of the potential patient populations for our product candidates and any future product candidates, if approved for commercial use;

our clinical and regulatory development plans;

our expectations with regard to the results of our clinical studies, preclinical studies and research and development programs, including the timing and availability of data from such studies;

the timing of commencement of future nonclinical studies and clinical trials and research and development programs;

our ability to acquire, discover, develop and advance product candidates into, and successfully complete, clinical trials;

our intentions and our ability to establish collaborations and/or partnerships;

the timing or likelihood of regulatory filings and approvals for our product candidates;

our commercialization, marketing and manufacturing capabilities and expectations;

our intentions with respect to the commercialization of our product candidates;

the pricing and reimbursement of our product candidates, if approved;

the potential effects of COVID-19 on our preclinical and clinical programs and business;

the implementation of our business model and strategic plans for our business and product candidates, including additional indications for which we may pursue;

the scope of protection we are able to establish and maintain for intellectual property rights covering our product candidates, including the projected terms of patent protection;

estimates of our expenses, future revenue, capital requirements, our needs for additional financing and our ability to obtain additional capital;

our future financial performance; and

developments and projections relating to our competitors and our industry, including competing products.


We have based these forward-looking statements largely on our current expectations, estimates, forecasts and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. In light of the significant uncertainties in these forward-looking statements, you should not rely upon forward-looking statements as predictions of future events. Although we believe that we have a reasonable basis for each forward-looking statement contained in this Annual Report on Form 10-K, we cannot guarantee that the future results, levels of activity, performance or events and circumstances reflected in the forward-looking statements will be achieved or occur at all. You should refer to the sections titled “Risk Factor Summary” and “Risk Factors” for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. Except as required by law, we undertake no

i


obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.

You should read this Annual Report on Form 10-K and the documents that we reference in this Annual Report on Form 10-K and have filed as exhibits completely and with the understanding that our actual future results may be materially different from what we expect. We qualify all of the forward-looking statements in this Annual Report on Form 10-K by these cautionary statements.


RISK FACTOR SUMMARYii


The following summarizes the most material risks that make an investment in our securities risky or speculative. If any of the following risks occur or persist, our business, financial condition and results of operations could be materially and adversely affected and the price of our common stock could significantly decline. This summary should be read in conjunction with the section titled “Risk Factors” and should not be relied upon as an exhaustive summary of the material risks we face.

We are a clinical-stage biopharmaceutical company with a limited operating history and no products approved for commercial sale. We have incurred significant losses since our inception, and we anticipate that we will continue to incur significant losses for the foreseeable future, which, together with our limited operating history, makes it difficult to assess our future viability.

We will require substantial additional financing to achieve our goals, and a failure to obtain this necessary capital when needed on acceptable terms, or at all, could force us to delay, limit, reduce or terminate our product development programs, commercialization efforts or other operations.

Our business is heavily dependent on the successful development, regulatory approval and commercialization of our product candidates which are in early stages of clinical development.

Public health crises such as pandemics or similar outbreaks could materially and adversely affect our preclinical and clinical trials, business, financial condition and results of operations.

Research and development of biopharmaceutical products is inherently risky. We cannot give any assurance that any of our product candidates will receive regulatory approval, which is necessary before they can be commercialized.

Adverse events or undesirable side effects caused by, or other unexpected properties of, any of our products could halt their clinical development, delay or prevent their regulatory approval, limit their commercial potential or result in significant negative consequences.

We rely on third-party suppliers to manufacture our product candidates, and we intend to rely on third parties to produce commercial supplies of any approved product. The loss of these suppliers, or their failure to comply with applicable regulatory requirements or to provide us with sufficient quantities at acceptable quality levels or prices, or at all, would materially and adversely affect our business.

Any collaboration arrangements that we may enter into in the future may not be successful, which could adversely affect our ability to develop and commercialize our product candidates.

Our current and any future product candidates or products could be alleged to infringe patent rights and other proprietary rights of third parties, which may require costly litigation and, if we are not successful, could cause us to pay substantial damages and/or limit our ability to commercialize our products.


PART I

Item 1. Business.

In this Annual Report on Form 10-K, “we,” “our,” “us,” “Annexon” and the “Company” refer to Annexon, Inc. and its consolidated subsidiary. Annexon, Annexon, Inc., the Annexon logo and other trade names, trademarks or service marks of Annexon are the property of Annexon, Inc. This report contains references to our trademarks and to trademarks belonging to other entities. Trade names, trademarks and service marks of other companies appearing in this report are the property of their respective holders. We do not intend our use or display of other companies’ trade names or trademarks to imply a relationship with, or endorsement or sponsorship of us by, any other companies.

Overview

We are a clinical-stage biopharmaceutical company pioneering a new class of complement medicines designed to stop thefor patients with classical complement pathway at its start, C1q, in order to bring therapies to patients suffering from serious complement-mediated autoimmune, neurodegenerative and ophthalmic disorders. C1q, the initiating molecule of theThe classical complement pathway is a core component to the body’s immune system that activates a powerful inflammatory cascade. We believe that by stopping the classical complement pathway at its start by targeting C1q, the initiating molecule of the classical complement pathway, our approach may have the potential to provide more complete protection against complement-mediated disorders of the body, brain and eye.

OurUsing our proprietary platform, leverages well-researched classical complement-mediated autoimmunewe are identifying and neurodegenerative disease processes, both of which are triggered by aberrant activation of C1q. Evidence suggests that potent and selective inhibition of C1q can prevent tissue damage triggered in antibody-mediated autoimmune disease and preserve loss of functioning synapses associated with cognitive and functional decline in complement-mediated neurodegeneration. By taking an upstream complement approach targeting C1q, our treatments are designed to act as an “on/off switch” to block all downstream componentscharacterizing the role of the classical complement pathway in three therapeutic areas—autoimmune, neurodegeneration and ophthalmology. In so doing, we are advancing a broad pipeline of product candidates designed to block the early classical cascade and all downstream pathway components and their tissue-damaging functions. Our goal is to suppress excessive or aberrant classical complement activity that leadcontributes to excesschronic inflammation and tissue damage and patient disability in a host of complement-mediated disorders,to slow or even halt disease progression, while preserving the normalbeneficial immune functionfunctions of the lectin and alternative complement pathways involved in the clearance of pathogens and damaged cells. We have demonstrated robust target engagement in the body, brain and eye, and clinical proof of concept in multiple diseases, resulting in four flagship programs that we are actively advancing:

Guillain-Barré Syndrome, or GBS: We are advancing our lead candidate, ANX005, an investigational, full-length monoclonal antibody, or mAb, formulated for intravenous administration in a pivotal Phase 3 clinical trial for the potential treatment of patients with GBS. GBS is a rare antibody-mediated autoimmune disease with no U.S. Food and Drug Administration, or FDA, approved therapies, and for which we believe maximum suppression of C1q and the classical cascade early in the disease process may act to rapidly prevent nerve damage and irreversible neurological disability. We demonstrated clinical proof-of-concept in a prior placebo-controlled trial and expect to complete enrollment of approximately 220 patients in our ongoing Phase 3 GBS trial in the second half of 2023, with data anticipated in the first half of 2024.
Huntington’s Disease, or HD: We are evaluating ANX005 for the potential treatment of patients with HD, a slowly progressing, inherited and fatal neurodegenerative disease in which we believe C1q triggers synapse loss and neuroinflammation. We completed a Phase 2 clinical trial in patients with manifest HD in 2022, in which ANX005 demonstrated positive efficacy results and was generally well-tolerated. Based on the Phase 2 results and a productive engagement with the FDA in late 2022, we are preparing to advance ANX005 into a randomized, double-blind, placebo-controlled Phase 2/3 trial for patients with HD in 2023.
Geographic Atrophy, or GA: We are evaluating ANX007, an antigen-binding fragment, or Fab, formulated for intravitreal administration, for the potential treatment of patients with GA, the leading cause of blindness resulting from damaged and dying retinal cells. ANX007 is designed to block C1q locally in the eye to provide more complete protection against excess classical complement activity, a key driver of disease. We completed enrollment of approximately 270 patients in our ongoing Phase 2 GA trial in early 2022. We expect to report data from the 12-month treatment-period of the Phase 2 trial in

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mid-2023, followed by additional data after the conclusion of the six-month off-treatment period by the end of 2023.
ANX1502 for Autoimmune Indications: ANX1502 is a novel oral small molecule targeting classical complement, which we believe is first-in-kind. We are conducting an ongoing Phase 1 single-ascending dose, or SAD, and multiple-ascending dose, or MAD, clinical trial designed to evaluate the safety, tolerability, pharmacokinetics, or PK, and pharmacodynamics, or PD, of ANX1502 in healthy volunteers. In the SAD trial, a single dose of 450 mg has achieved target drug levels in plasma in patients, consistent with twice-daily dosing. Additionally, ANX1502 has been generally well-tolerated as of October 23, 2022. The SAD trial is ongoing to identify the maximum tolerated dose. We are preparing to initiate a proof-of-concept trial in patients with cold agglutinin disease, or CAD, in 2023, which is supported by positive data previously generated by ANX005 in CAD patients. We also plan to expand development into additional autoimmune indications with strong scientific rationale, including multifocal motor neuropathy, or MMN, in the first half of 2024.

In addition to our flagship programs, we are studying multiple programs across our three therapeutic franchise areas, including:

Amyotrophic Lateral Sclerosis, or ALS: We are evaluating ANX005 in a Phase 2a signal-finding clinical trial in patients with ALS, a fatal neurodegenerative disorder characterized by C1q activation driving inflammation and neurodegeneration. Preliminary Phase 2a data as of December 6, 2022 from the first eight patients in the trial showed that treatment with ANX005 resulted in a reduction in neurofilament light, or NfL, a neurodegenerative disease biomarker, and slowed disease progression as measured by reductions in revised ALS functional rating scores during the initial 12-week on-treatment period, followed by an increase in disease progression in the off-treatment period. Enrollment in the Phase 2a trial is ongoing, and we expect to report full data from the Phase 2a clinical trial in 2023.
Lupus Nephritis, or LN:We are advancing a broad pipelinePhase 1b signal-finding trial of product candidates designedANX009, a C1q Fab formulated for subcutaneous delivery, using a precision medicine approach for patients with LN who have high baseline complement activity. LN is an autoimmune disease for which pathogenic autoantibodies against C1q enhance activity and uniquely amplify kidney inflammation and damage. Enrollment in the Phase 1b clinical trial is ongoing with multiple patients dosed, and clinical data are expected in the first half of 2023.
ANX105: We are continuing to block the activity of C1qevaluate ANX105, a next-generation full-length mAb, in a Phase 1 SAD clinical trial in healthy volunteers. Enrollment is ongoing and the entire classical complement pathway for a range of complement-mediated diseases. Our development strategy is focused on areas where C1q and the classical complement pathway is the key driver of disease. Our pipeline includes three clinical-stage assets across three therapeutic franchises:

initial data are expected in 2023.

Autoimmune. We are advancing our lead candidate, ANX005, an investigational, full-length monoclonal antibody formulated for intravenous administration for several autoimmune indications. ANX005 is currently being evaluated in a Phase 2/3 clinical trial for the potential treatment of patients with Guillain-Barré Syndrome (GBS) with data anticipated in 2023 and a Phase 2 trial in patients with warm autoimmune hemolytic anemia (wAIHA) with data anticipated in the second half of 2022. Our ANX009 clinical candidate is a subcutaneous formulation of an antigen-binding fragment, or Fab. ANX009 has been evaluated in a Phase 1 trial and based on the data from this trial, we plan to advance ANX009 into a Phase 1b trial in patients with lupus nephritis (LN) with initial data expected in the second half of 2022.

Neurodegeneration. We are also developing ANX005 for the potential treatment of neurodegenerative indications. ANX005 is currently being evaluated in Phase 2 trials in Huntington’s disease (HD) and amyotrophic lateral sclerosis (ALS). Interim data from the HD trial showed improvements in clinical measures and that ANX005 had been generally well tolerated. We plan to present the full data from our HD trial in the second quarter of 2022. Data from Phase 2 trial of ANX005 in patients with ALS is expected to be reported in 2023.

Ophthalmology. Our ANX007 program is a Fab formulated for intravitreal administration for the potential treatment of neurodegenerative diseases of the eye. We are currently conducting a Phase 2 trial in patients with geographic atrophy (GA) with data expected in 2023.


Beyond our clinical-stage assets, our preclinical portfolio of next generation product candidates includes ANX105, an investigational monoclonal antibody targeting neurodegenerative indications, and ANX1502, an investigational oral small molecule in development forleveraging the treatment of certain autoimmune indications. Based on learnings from our initial trials and our expertise in the role of C1q and the classical complement pathway, we are evaluating additional orphan and large market indications that are driven by aberrant or excess classical complement activation.

Our CompanyAnnexon was co-founded by the late Dr. Ben Barres, former member of the National Academy of Sciences, Chair of Neurobiology at Stanford University and a pioneer in complement-mediated neurodegeneration, and Dr. Arnon Rosenthal, a world-renowned scientist and industry executive. We have assembled a seasoned and accomplished management team that has been involved in the discovery, development, approval and commercialization of numerous marketed drugs, and has been studying the complement pathway and autoimmune and neurodegenerative disorders for decades. Our team is further supported by an experienced scientific advisory board, board of directors and leading healthcare investors that share our commitment to advancing transformative medicines for patients suffering from debilitating autoimmune and neurodegenerative diseases.

We hold worldwide development and commercialization rights, including through exclusive licenses, to all of our product candidates, which allows us to strategically maximize value from our product portfolio over time. Our patent portfolio includes patent protection for our upstream complement platform and each of our product candidates.

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Our Pipeline

Our pipeline is led by four flagship programs focused on antibody-mediated autoimmunecomplement-mediated diseases of the body, brain and complement-mediated neurodegenerative disorderseye for which there is significant unmet medical need. Ourneed and where we have the potential to provide a first-in-class treatment opportunity. Beyond our flagship programs, we are evaluating additional clinical-stage product candidates arein a variety of indications and have active research efforts for additional pipeline programs in the future. Our clinical-stage pipeline is summarized below:

img134458515_0.jpg 

Our first clinical-stage product candidate is ANX005, an investigational monoclonal antibodymAb designed to block C1q and activation of the classical complement cascade. For GBS, ANX005 is designed to act early in the disease course to prevent nerve damage and irreversible neurological disability in GBS patients. In the Phase 1b dose-ranging trial in GBS patients, treatment with ANX005 was well-tolerated and resulted in full and prolonged C1q engagement and classical cascade inhibition in the blood and cerebrospinal fluid, or CSF. While our Phase 1b trial was not powered to show statistical significance, we did observeobserved a significant reduction in neurofilament light chain, or NfL, a well-accepted marker of nerve damage in neurodegenerative disease that has been shown to correlate with disease severity and clinical outcomes. Patients treated with ANX005 also showed positive numerical trends across key GBS outcome measures. GBS is a rare, acute, antibody-mediated autoimmune disease impacting the peripheral nervous system. There are currently no approved therapies for GBS in the United States, but intravenousStates. Intravenous immunoglobulin, or IVIg, and plasma exchange are the current standards of care in the Western world and parts of Asia.


In March 2021, we completed the evaluation of our drug-drug interaction, or DDI, study of ANX005 co-administered with Intravenous Immunoglobulin (IVIg)IVIg in 14 patients with GBS. The DDI study was conducted to evaluate the safety and tolerability of ANX005 and IVIg co-administration in GBS patients, and measured pharmacokinetics (PK)PK and pharmacodynamics (PD)PD of ANX005 when administered in combination with IVIg. IVIg, though not approved by the U.S. Food and Drug Administration (FDA)FDA in the United States for GBS, is currently the standard of care for GBS. Results from the DDI study demonstrated that co-administration of IVIg-ANX005 was well-tolerated and achieved full C1q target engagement, and C1q suppression was maintained within the targeted range. The open-label DDI study was not placebo-controlled or powered for statistical significance on efficacy measures. Several key GBS outcome measures were recorded from baseline, and early improvement was observed in GBS patients, including increased muscle strength, decreased neurofilament light chain (NfL)NfL and improved GBS disability score. Results from the DDI study were presented at the Peripheral Nerve Society in 2021.

A randomized, placebo-controlled, pivotal Phase 2/3 clinical trial of ANX005 is ongoing in GBS patients in developing countries and we plan to release data from this trial in 2023. The Phase 2/3 trial is statistically powered to evaluate the efficacy of ANX005 in improving disability in GBS patients. Following an engagement with the FDA regarding the statistical analysis plan for the ongoing Phase 3 trial, we plan to increase the study population by approximately 40 patients for a total of 220 patients. Expanded enrollment

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is expected to be completed in the second half of 2023 with data from the pivotal Phase 3 clinical trial anticipated in the first half of 2024. ANX005 has received both Orphan Drug and Fast Track designations from the FDA for the treatment of GBS.

Beyond GBS, we are evaluating ANX005 in patients with warm autoimmune hemolytic anemia, or wAIHA, an antibody-mediated autoimmune disease characterized by the premature destruction of red blood cells. The classical complement pathway plays an important role in wAIHA through the removal of red blood cells labeled by activated complement components in the spleen or liver (extra-vascular hemolysis) and less common destruction of red blood cells in the blood vessels by the classical complement generated membrane attack complex (intravascular hemolysis). We initiated a Phase 2 trial in patients with the primary diagnosis of wAIHA in 2021. We are conducting a non-interventional screening study in wAIHA patients to utilize complement activation markers to identify and select patients who may be more likely to respond to our anti-C1q therapy in the Phase 2 trial. We plan to report data from this trial in the second half of 2022.

We are also studying ANX005 in patients with HD as well as patients with ALS – two neurodegenerative disorders in which aberrant classical complement activation has been shown to be associated with synapse loss, elevated levels of NfL and disease progression. In June 2022, we announced final data from the Phase 2 trials evaluatingtrial of ANX005 in patients with HD, and ALS are ongoing, each designed to assess ANX005’s safety, tolerability, target engagement and impact on disease-related biomarkers and clinical outcomes. In January 2022, we announced interim data from the HD trial from patients who completed the 24-week treatment period. Interim datawhich showed that as of a safety cutoff date of October 17, 2021, treatment with ANX005 has beenwas generally well-tolerated, with full target engagement of C1q in both serum and CSF observed throughthroughout the dosingsix-month treatment period and well into the three-month follow-up period. Disease progression stabilized for the entire nine months of the study, as of a cutoff date of December 14, 2021. Evaluable patients maintained clinical function, as measuredassessed by changes in meanboth Composite Unified Huntington's Disease Rating Scale, (cUHDRS), relative toor cUHDRS, and Total Functional Capacity, or TFC, the two primary clinical measurement scales for HD. Additionally, HD patients with higher baseline after sixcomplement activity, as measured by elevated levels of C4a in CSF, demonstrated a rapid clinical benefit, as assessed by both cUHDRS and TFC, that was sustained over the entire nine months of treatment, and improvementthe study. Improvement in cUHDRS and TFC in HD patients with higher baseline complement was observed in more than half of all evaluable patientsevident six weeks after dosing initiation and in 75% of evaluable patients who showed excess complement activity at baseline.was maintained over nine months through the on-treatment and follow-up periods. Plasma and CSF NfL levels observed after six months of treatment remained generally consistent through the nine-month study, and were comparable to NfL levels described in published natural history data for HD patients. We currently anticipate reporting fullBased on these findings and a productive engagement with the FDA, we plan to advance ANX005 into a randomized, double-blind, placebo-controlled Phase 2/3 trial for patients with HD in 2023.

Our Phase 2 trial evaluating ANX005 in patients with ALS is ongoing, and is designed to assess the safety, tolerability, target engagement and impact on disease-related biomarkers and clinical outcomes by ANX005. Preliminary data from all patients treated, including data from(n=8) showed that treatment with ANX005 resulted in a reduction in NfL and slowing of disease progression, as measured by reductions in revised ALS functional rating scores, during the three-month follow-upinitial 12-week on-treatment period, followed by an increase in disease progression in the second quarteroff-treatment period as of December 6, 2022. The ALSEnrollment in the trial is ongoing and we plan to reportwith full data expected in 2023.

Our second clinical-stage product candidate is ANX007, an investigational C1qC1q-targeting Fab designedformulated for intravitreal administration in patients with complement-mediated neurodegenerative ophthalmic disorders. Consistent with the results we observed in preclinical studies, in the Phase 1b trial with intravitreal administration in glaucoma patients, ANX007 was well-tolerated and showed full target engagement and inhibition of C1q in the eye for at least four weeks. We believe inhibition of C1q may provide neuroprotective benefit by preventing the aberrant loss of functioning synapses in the retina in a variety of ophthalmic disorders, including glaucoma and geographic atrophy, or GA. A Phase 2 trial of ANX007 in patients with GA, the leading cause of blindness resulting from damaged and dying retinal cells, is ongoing, withongoing. ANX007 is designed to block C1q locally in the goaleye, to provide more complete protection against excess classical complement activity, a key driver of protecting againstGA, and the loss of photoreceptor neuronsneurons. Enrollment in a well-defined patient population.the ongoing Phase 2 clinical trial was completed in early 2022. We plan to report data from thisthe on-treatment period of the Phase 2 trial in mid-2023, followed by data after the conclusion of the six-month off-treatment period by the end of 2023.

Our third clinical-stage product candidate is ANX1502, an investigational oral small molecule being developed for the treatment of complement-mediated autoimmune diseases. We are evaluating ANX1502 in an ongoing Phase 1 SAD and MAD trial in healthy volunteers. In the SAD trial, a single dose of 450 mg achieved target drug levels in plasma in patients, consistent with twice-daily dosing. Additionally, ANX1502 has been generally well-tolerated as of October 23, 2022. The SAD trial is ongoing to identify the maximum tolerated dose. We are preparing to initiate a proof-of-concept trial in patients with CAD in 2023, which is supported by positive data generated by ANX005 in CAD patients in a Phase 2 signal-finding trial. We plan to expand development of ANX1502 into additional autoimmune indications with strong scientific rationale, including MMN, in the first half of 2024.

Our fourth clinical-stage product candidate is ANX009, an investigational C1q Fab designedformulated for subcutaneous delivery, which was evaluated in a first-in-human, or FIH, clinical trial. In this trial, ANX009 was well-tolerated at all dose levels tested and no drug-related safety signals were observed. The trial showed that ANX009 led to sustained C1q inhibition at multiple doses, supporting the potential for twice weeklytwice-weekly subcutaneous administration with the


current formulation. We are developingdesigned ANX009 to potentially enablewith a goal of enabling chronic dosing for patients with antibody-mediated autoimmune disorders where anti-C1q may have a disease-modifying effect and where we can utilize our targeted biomarker-driven approach. These disorders may include autoimmune hemolytic anemias andANX009 is currently being evaluated in a subset of lupus nephritisPhase 1b signal-finding trial using a precision

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medicine approach for patients who are selected for pathogenic anti-C1q antibodies, or PACA, andwith LN who have a high riskbaseline complement activity. Enrollment in this trial is ongoing with multiple patients dosed and data are expected in the first half of renal flare.2023.

We are also developing additionalour next-generation product candidates, includingcandidate, ANX105, an investigational monoclonal antibodymAb with enhanced dosing and PK properties designed for chronic neurodegenerative diseases, and ANX1502, an oral small molecule being developed for certain autoimmune indications. We intend to initiatediseases. Enrollment in a FIHPhase 1 SAD trial of ANX105 in the first half of 2022, withhealthy volunteers is ongoing and initial data anticipated in 2023. We intend to initiate a FIH trial of ANX1502 in the second half of 2022, with dataare expected in 2023.

Our Strategy

Our goal is to develop disease-modifying medicines for patients suffering from classical complement-mediated diseases. Key elements of our strategy include:

Leveraging our distinct approach of inhibiting C1q and aberrant upstream and downstream classical complement activity to address a broad range of well-characterized classical complement-mediated diseases. By inhibiting C1q and the early classical cascade, we believe our product candidates are uniquely designed to address a wide range of antibody-mediated autoimmune diseases and complement-mediated neurodegenerative disorders of the brain and the eye. We believe full classical complement inhibition may result in clinical benefits by blocking aberrant upstream and downstream immune cell activation in our targeted indications, as well as potentially provide safety advantages by leaving the lectin and alternative pathways intact to perform their normal immune functions.
Prioritizing resources and execution of late-stage development of four flagship programs. By prioritizing our efforts on our four flagship programs in GBS, HD, GA and our novel oral small molecule, ANX1502, our goal is to create near-term value for patients, physicians and stakeholders.
Advancing ANX005 through clinical development in multiple autoimmune and neurodegenerative indications of high unmet need. We are developing ANX005 as a potential treatment for GBS, HD and ALS.ANX005 has been generally well-tolerated and demonstrated full target engagement and rapid and durable improvement in clinical outcomes for patients in two difficult-to-treat indications – GBS and HD – and with encouraging, early signs of activity in ALS. We are currently evaluating ANX005 in a pivotal Phase 3 trial in GBS and plan to initiate a Phase 2/3 trial for patients with HD in 2023. Our Phase 2 trial of ANX005 in patients with ALS is underway and we plan to report full data in 2023.
Evaluating ANX007 as an agent for neuroprotective benefit in ophthalmic indications. We are developing ANX007 in neurodegenerative ophthalmic indications, such as GA. ANX007 reduced retinal damage in animal models of GA and glaucoma. In our Phase 1b trial in glaucoma patients, intravitreal administration of ANX007 resulted in full target engagement of C1q at both low and high doses. Based on this clinical dosing data, our preclinical data in glaucoma and GA, and proximate clinical validation from downstream complement approaches, we believe that ANX007 may provide neuroprotective benefit in patients with these and other complement-mediated ophthalmic disorders. ANX007 is currently being evaluated in a Phase 2 trial in patients with GA with data anticipated in mid-2023.
Demonstrating clinical proof-of-concept with ANX1502, an oral small molecule targeting classical complement. We are currently evaluating ANX1502 in an ongoing Phase 1 SAD and MAD trial in healthy volunteers. As of October 23, 2022, ANX1502 has been generally well-tolerated and achieved target drug levels with a single dose. The SAD trial is ongoing to identify the maximum tolerated dose. We are preparing to initiate a proof-of-concept study in 2023 in patients with CAD. Additionally, we plan to expand development into additional autoimmune indications with strong scientific rationale, including MMN.
Expanding our portfolios across three therapeutics franchises informed by data from our flagship programs. We intend to leverage learnings from our flagship programs to inform selection of additional orphan and larger patient populations involving related biological mechanisms. In our autoimmune portfolio, additional indications include antibody-mediated autoimmune disorders such as CAD, lupus nephritis (specifically in lupus nephritis patients with endogenous PACA), and MMN. In our neurodegenerative portfolio, additional potential indications include ALS, frontotemporal dementia and Alzheimer’s disease. In our ophthalmology franchise, additional indications include glaucoma and other complement-mediated neurodegenerative diseases of the eye. We plan to efficiently prosecute

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opportunities across our three therapeutic franchises utilizing our disciplined, biomarker-driven development strategy.
Developing additional product candidates that are designed to inhibit activation of the classical complement cascade. We have secured broad intellectual property protection for our upstream complement platform and intend to leverage our intellectual property and know-how to protect and enhance our leading position in developing novel therapeutics that target the classical complement cascade. We are developing product candidates, such as ANX009, to modulate the classical pathway with the potential to become tailored therapeutics for a large range of indications using different molecular modalities, dosing regimens and tissue localization strategies. In addition, we are developing next-generation product candidates, including ANX105, an investigational monoclonal antibody.
Maximizing the value of our product candidates. We currently hold worldwide development and commercialization rights, including through exclusive licenses, to all of our product candidates. We intend to pursue independent development and commercialization in select indications and markets that we can address with a focused sales and marketing organization. We may opportunistically explore licensing agreements, collaborations or partnerships to develop our product candidates in larger market indications where we could accelerate development utilizing the resources of larger biopharmaceutical companies.

Leveraging our distinct approach of inhibiting C1q and aberrant upstream classical complement activity to address a broad range of well-characterized classical complement-mediated diseases. By inhibiting C1q and the early classical cascade, we believe our product candidates are uniquely designed to address a wide range of antibody-mediated autoimmune diseases and complement-mediated neurodegenerative disorders. We believe full classical complement inhibition may result in clinical benefits by blocking aberrant upstream immune cell activation in our targeted indications, as well as potentially provide safety advantages by leaving the lectin and alternative pathways intact to perform their normal immune functions. We believe our clinical-stage product candidates, ANX005, ANX007 and ANX009 are the first and leading clinical-stage product candidates designed to inhibit C1q and the entire classical complement pathway.

AdvancingANX005 through clinicaldevelopmentinmultipleautoimmuneandneurodegenerative indicationsofhighunmetneed.We are developing ANX005 as a potential treatment for GBS, HD, ALS and wAIHA.OurPhase1btrialinpatientswithGBSdemonstratedfulltarget engagementofC1qinserumandtheCSF,aswellasasignificantreductioninNfL,awell-accepted biomarkershowntobeelevatedinpatientswithGBS,HDandALSandcorrelatedwithdisease severityandclinicalcourseandoutcomes and is now in a Phase 2/3 trial.ANX005 is also being evaluated in ongoingPhase2trialsinpatientswithHD, ALS and wAIHA. Interim data from the Phase 2 trial in HD patients showed meaningful improvements in clinical measures of disease and was generally well-tolerated.

EvaluatingANX007asanagentforneuroprotectivebenefitinophthalmicindications.WearedevelopingANX007inneurodegenerativeophthalmicindications,suchas glaucomaand GA. ANX007 reducedretinaldamageinanimalmodelsofglaucomaandGA.InourPhase1btrialinglaucoma patients,intravitrealadministrationofANX007resultedinfulltargetengagementofC1qatbothlow andhighdoses.Basedonthisclinicaldosingdata,ourpreclinicaldatainglaucomaandGA,and proximateclinicalvalidationfromdownstreamcomplementapproaches,webelievethatANX007may provideneuroprotectivebenefitinpatientswiththeseandothercomplement-mediatedophthalmic disorders. ANX007 is currently being evaluated in a Phase 2 trialin patientswith GA.

Expandingourautoimmuneandneurodegenerativeportfoliosinformedbydatafromourbeachheadindications.Ourinitialindicationsrepresentourbeachheadwithinantibody-mediatedautoimmuneandcomplement-mediatedneurodegenerativediseases.Weintendtoleveragelearningsfromourinitialindicationstoinformselectionofadditionalorphanandlargerpatientpopulationsinvolvingrelatedbiologicalmechanisms.Inourautoimmuneportfolio,potentialindicationsincludeantibody-mediatedautoimmunedisorderssuchaswAIHA,ColdAgglutininDisease,orCAD, multifocal motor neuropathy,andlupusnephritis,(specificallyinlupusnephritispatientswithendogenousPACA).Inourneurodegenerativeportfolio,potentialindicationsincludecomplement-mediatedneurodegenerationdisorders in theeyeandbrainsuchasglaucoma,GA,HD,ALS,frontotemporaldementiaandAlzheimer’sdisease.Weplantoefficientlyprosecutethesebroadopportunitiesutilizingourdisciplined,biomarker-drivendevelopmentstrategy.


Developingadditionalproductcandidatesthataredesignedtoinhibitactivationoftheclassical complementcascade.Wehavesecuredbroadintellectualpropertyprotectionforourupstream complementplatformandintendtoleverageourintellectualpropertyandknow-howtoprotectand enhanceourleadingpositionindevelopingnoveltherapeuticsthattargettheclassicalcomplement cascade.Wearedevelopingproductcandidates,suchasANX009,tomodulatetheclassicalpathway withthepotentialtobecometailoredtherapeuticsforalargerangeofindicationsusingdifferent molecularmodalities,dosingregimensandtissuelocalizationstrategies.Inaddition,wearedeveloping nextgenerationproductcandidates,includingANX105,aninvestigationalmonoclonalantibody,and ANX1502, an investigational oral small molecule in development for the treatment of certain autoimmune indications.

Maximizingthevalueofourproductcandidates.Wecurrentlyholdworldwidedevelopmentandcommercializationrights,includingthroughexclusivelicenses,toallofourproductcandidates.Weintendtopursueindependentdevelopmentandcommercializationinselectindicationsandmarketsthatwecanaddresswithafocusedsalesandmarketingorganization.Wemayopportunisticallyexplorelicensingagreements,collaborationsorpartnershipstodevelopourproductcandidatesinlargermarketindicationswherewecouldacceleratedevelopmentutilizingtheresourcesoflargerbiopharmaceuticalcompanies.

Overview of the Complement System and C1q Biology

The Complement System—three main complement pathways

The complement system is an integral component of the immune system that consists of many circulating and locally-produced molecules. This system evolved to enhance, or complement, other components of the adaptive and innate immune systems. The complement system, also known as the complement cascade, rapidly responds to pathogens, damaged cells and unwanted tissue components to facilitate their removal by the immune system.

There are three main complement pathways (also called cascades)—the classical, lectin and alternative pathways. Each pathway is initiated by different molecules that respond to distinct triggers. When activated, the initiating molecules set in motion a cascade of enzymatic reactions that greatly amplify, or complement, an inflammatory response. The classical pathway is initiated by C1q, which recognizes antibody complexes, specific pathogens, damaged cells or unwanted cellular components. The lectin pathway is triggered by carbohydrates on the surface of pathogens or cells. The alternative pathway amplifies the action of the other two pathways and also self-activates to eliminate pathogens or cells that are not specifically shielded by the body’s built-in self-protective systems. While these three pathways are initiated by distinct molecules, they converge downstream on common pathway components known as C3 and C5.

Thethreemainpathwaysof thecomplement cascadeare activated by independent molecules but converge at C3

 independentmoleculesbut convergeatC3

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Aberrant activation of the complement system can result in a range of diseases characterized by an attack on healthy tissue, such as red blood cells, nerve cells or kidney components. A broad range of diseases are known to be associated with pathological activation of the complement cascade, including antibody-mediated autoimmune disorders such as GBS, wAIHA, CAD and lupus nephritis, and complement-mediated neurodegeneration disorders in


the eye, such as glaucoma and GA, and complement-mediated neurodegeneration disorders in the brain, such as glaucoma, GA, HD, ALS,

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frontotemporal dementia and Alzheimer’s disease. We believe intervening in the activation of the complement cascade offers a potent and selective mechanism for specifically slowing or reversing these disease processes.

Specific activated components of the complement cascade have important immune functions that contribute to three key outcomes:

Immunecellrecruitmentandinflammation.Specific activated molecules from the cascade serve as soluble signals to make blood vessels leaky and attract immune cells into tissues.

Immune cell recruitment and inflammation. Specific activated molecules from the cascade serve as soluble signals to make blood vessels leaky and attract immune cells into tissues.

Directedimmunecellattack.Several complement components, including C1q, bind directly to the pathogen and serve as receptors that direct immune cell attack and pathogen engulfment.

Directed immune cell attack. Several complement components, including C1q, bind directly to the pathogen and serve as receptors that direct immune cell attack and pathogen engulfment.

Membranedamage.Downstream components of the cascade directly puncture the pathogen or cell surface, causing membrane damage and lysis.

Membrane damage. Downstream components of the cascade directly puncture the pathogen or cell surface, causing membrane damage and lysis.

Aberrant activation of the initiating molecule, C1q, can lead to three main outcomes

 activation

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Inhibiting C1q upstream blocks downstream components and functional activities of theinitiatingmolecule,C1q,can leadtothreemainoutcomes

InhibitingC1qupstreamblocksdownstreamcomponentsandfunctional activitiesoftheclassicalcomplementcascade

Broad potential for Classical Complementclassical complement pathway targeted therapeutics in Autoimmuneautoimmune and Neurodegenerative Diseasesneurodegenerative diseases

Theclassicalcomplementcascadehasawell-establishedroleinaugmentingantibodyfunctionwithinthe immunesystem.C1qrecognizesantibodiesboundtopathogensorcellsandactivatestheclassicalpathwayto triggertheirremovalandclearancebytheimmunesystem.C1qcanalsodirectlyrecognizepathogens,damaged cellsorunwantedcellularcomponentsleadingtosimilardownstreamclearance.Amorerecentfindingmadeby thelaboratoryofDr.Ben Barres,ourscientificfounder,isthatC1qalso directlyinteractswith neuronal connections,orsynapses,duringearlydevelopment.RecognitionofweakersynapsesbyC1q triggers the classical complement cascade and directs immune cells to “prune” the synapses away from neurons, thereby reinforcing stronger synapses to establish appropriate neuronal connections.

Because of its central role in immune function, aberrant activation of C1q can lead to damage of healthy tissue and destruction of functioning synapses. We are focused on two distinct disease processes involving C1q as a key mediator of tissue damage: antibody-mediated autoimmune disease and complement-mediated neurodegeneration.


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In antibody-mediated

 

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In antibody-mediated autoimmunedisease,self-reactiveantibodiesbindtocellsortissues,activatingC1q andleadingtodamaginginflammatoryresponses.WehaveobservedthatinhibitionofC1qwasprotectivein severalanimalmodelsofantibody-mediatedautoimmunedisease,includingneuromyelitisoptica,orNMO,and twovariantsofGBS.InNMO,auto-antibodiesrecognizecellswithinthecentralnervoussystem,orCNS,and canleadtorapidlocalizeddestructionoftheopticnerveandregionsofthespinalcord,whileinGBSpathogenic antibodiesreactwithcomponentsoftheperipheralnervesystem,orPNS,tocausewidespreadperipheralnerve damageandparalysis.Thisdiseaseprocessisalsoevidentinantibody-mediatedautoimmunediseaseinvolving bloodcomponents,suchaswAIHAandCAD,characterizedbyauto-reactiveantibodiesthattriggerdestruction ofredbloodcells,andsystemiclupuserythematosus,orSLE,whereendogenouspathogenicantibodiesagainst C1qitselfdriveaberrantC1qactivationand are highly associatedwith kidney damage, or lupus nephritis.

Incomplement-mediatedneurodegeneration,aberrantactivationofC1q atsynapsesinaginganddiseasecan leadtoexcessivesynapselossandneuronaldamage,drivingdiseaseprogressioninmultipleneurodegenerative disordersregardlessoftheinitiatingfactor.Inanimalmodels,C1qaccumulatedonsynapseswithage,building upto300-foldhigherlevelsthaninyoungeranimals.Itdidnotactivatewithnormalaging,butother inflammatorystimuli,includingmisfoldedproteins,metabolicdysfunctionorincreasesinintraocularpressure, appearedtoaberrantlyreactivateC1q’sdevelopmentalroleinsynapseelimination.Complementactivationand aberrantsynapsepruningindiseasemayleadtoneuroinflammation,lossofsynapticneuronalconnectionsand neurodegeneration.Insupportofthishypothesis,weandotherinvestigatorshaveobservedthatC1qinhibition was protective in numerous models of neurodegenerative disease, including diseases of the eye, such as glaucoma and age-related macular degeneration, chronic diseases of the CNS, such as frontotemporal dementia, Alzheimer’s, HD and Spinal Muscular Atrophy, or SMA, and acute injury, such as traumatic brain injury and stroke.

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 andage-relatedmaculardegeneration,chronicdiseasesoftheCNS,suchasfrontotemporaldementia, Alzheimer’s,HDandSpinalMuscularAtrophy,orSMA,andacuteinjury,suchastraumaticbraininjuryand stroke.


Synapticloss isa pathogenicdriver of disabilityinmany neurodegenerative diseases, protectedwith C1qinhibition

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Our differentiated approach to treating complement-mediated autoimmune and neurodegenerative disease through inhibition of C1q

Webelievethatinordertoselectivelyinhibitaberrantactivationoftheclassicalcomplementpathway implicatedindrivingcertaincomplement-mediatedautoimmuneandneurodegenerativediseases,itisimportant totargettheearlycomponentsoftheclassicalcascade,particularlyC1q,C4andC3.ActivatedfragmentsofC4 andC3inducevascularleakinessandimmunecellrecruitmentintothetissue,whileother C3. Activated fragmentsofC4and C3 induce vascular leakiness and immune cell recruitment into the tissue, while other fragments of C4 and C3, aswellasC1q,worktogethertodirectimmunecellattacktothecellorsynapsesurface.Furthermore,C1q inhibitionblocksdownstreamclassicalpathwayactivationofC5anditsmembranedamagingeffects.Webelieve thatinhibitionofC1qdoesnotblocktheactivityofthesecomponentsinthelectinoralternativecomplement pathways, and both of thesepathways will continueto perform their normal immune functions.theirnormalimmunefunctions.

Our Platform

Ournovelupstreamcomplementplatformisdesignedtocompletelyinhibitclassicalcomplementactivity forthetreatmentofantibody-mediatedautoimmunedisease diseases andcomplement-mediatedneurodegeneration. neurodegenerative diseases in the body, brain and eye. We believe there arepotentialadvantages toourapproach ofupstreaminhibition oftheclassical complement cascade,which include:

Fullinhibitionoftheclassicalcascadewhilepreservinghealthyimmunefunctionoftheother complementpathways.InhibitionofC1qfullyinhibitstheclassicalcascade,includingcomponents downstreamofC1qsuchasC4,C3,C5andthedownstreammembraneattackcomplex.Asaresult,webelieveourapproachisdesignedtoblockallclassicalcomplementactivitythatcancontributeto diseasepathology,includingimmunecellrecruitment,directedimmunecellattackandmembrane damage.Bytargetingupstreamtissue-damagingcomponentsoftheclassicalcomplementpathway,our approachleavesthelectinandalternativepathwaystoperformtheirnormalimmunefunction,which mayaidebothclinicalimprovementandsafety.OurapproachisalsodistinctfrominhibitingC3orC5. Inhibition of C5 will not affect the upstream components of the classical pathway involved in pathology(C1q,C4andC3),whileinhibitionofC3willblockdownstreamcomponentsinallthree complementpathways.

Full inhibition of the classical cascade while preserving healthy immune function of the other complement pathways. Inhibition of C1q fully inhibits the classical cascade, including components downstream of C1q such as C4, C3, C5 and the downstream membrane attack complex. As a result, we believe our approach is designed to block all classical complement activity that can contribute to disease pathology, including immune cell recruitment, directed immune cell attack and membrane damage. By targeting upstream tissue-damaging components of the classical complement pathway, our approach leaves the lectin and alternative pathways to perform their normal immune function, which may aide both clinical improvement and safety. Our approach is also distinct from inhibiting C3 or C5. Inhibition of C5 will not affect the upstream components of the classical pathway involved in pathology (C1q, C4 and C3), while inhibition of C3 will block downstream components in all three complement pathways.

Broadapplicabilityacrossmanyindications.Webelieveourapproachhasbroadutilityforthetreatmentofdiseasesinwhichfullinhibitionoftheentireclassicalcomplementcascademaybe beneficial.Webelieveourapproachisdistinguishablefromthosethattargetonlydownstream complementcomponents.Ourinitialindicationsrepresentourbeachheadwithinantibody-mediated autoimmuneandcomplement-mediatedneurodegenerativediseases,andwewillselectivelypursue bothorphanandlargerpatientpopulationdiseaseswithclearbiologicalevidenceofclassical complementactivation.WearealsodevelopingnovelproductcandidatestargetingC1qandearly componentsoftheclassicalcomplementcascade,andwillutilizedifferentmodalitiestotargetthese componentsof the classicalcomplementpathway.

Disciplined,biomarker-drivendevelopmentstrategyforourproductcandidates.Wearedeployingadisciplined,biomarker-drivendevelopmentstrategydesignedtoestablishconfidencethatourproduct candidatesareengagingthespecifictargetatawell-toleratedtherapeuticdoseintheintendedpatient tissue.Wedesignsmall,early-stageclinicaltrialstorigorouslyevaluateourproductcandidatesusing targetengagementandpharmacodynamicbiomarkers.Weareutilizingsensitive,specificassaysfor C1qandactivationofdownstreamclassicalcomplementcomponentstoevaluatetargetengagementin patienttissuesthataremostrelevantforthediseasesthatwearetreating.Webelievethatthisstrategyallowsustomakerational decisionsregardingourtherapeuticpipeline,increasingtheprobabilityoftechnicalsuccessover shorterdevelopmenttimelines.

Broad applicability across many indications. We believe our approach has broad utility for the treatment of diseases in which full inhibition of the entire classical complement cascade may be beneficial. We believe our approach is distinguishable from those that target only downstream complement components. Our Pipeline

Our pipeline is focused oninitial indications represent our beachhead within antibody-mediated autoimmune and complement-mediated neurodegenerative disordersdiseases, and we will selectively pursue both orphan and larger patient population diseases with clear biological evidence of classical complement activation. We are also developing novel product candidates targeting C1q and early components of the classical complement

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cascade, and will utilize different modalities to target these components of the classical complement pathway.
Disciplined, biomarker-driven development strategy for our product candidates. We are deploying a disciplined, biomarker-driven development strategy designed to establish confidence that our product candidates are engaging the specific target at a well-tolerated therapeutic dose in the intended patient tissue. We design small, early-stage clinical trials to rigorously evaluate our product candidates using target engagement and pharmacodynamic biomarkers. We are utilizing sensitive, specific assays for C1q and activation of downstream classical complement components to evaluate target engagement in patient tissues that are most relevant for the diseases that we are treating. We believe that this strategy allows us to make rational decisions regarding our therapeutic pipeline, increasing the probability of technical success over shorter development timelines.

Our Pipeline

Our pipeline is led by four flagship programs focused on complement-mediated diseases of the body, brain and eye for which there is significant unmet medical need. Ourneed, and where we have the potential to provide a first-in-class treatment opportunity. Beyond our flagship programs, we are evaluating additional clinical-stage product candidates are summarizedin a variety of potential indications and have active research efforts for additional pipeline programs in the table below.

future. Our First Product Candidate, ANX005

ANX005clinical-stage pipeline is an investigational humanized recombinant monoclonal antibody that is designed to potently bind and inhibit C1q. We have completed a Phase 1b clinical trial for ANX005 in patients with GBS in which ANX005 was well-tolerated and achieved full target engagement and C1q suppression in the PNS and CNS. Based on the results from our Phase 1b trial, we are now evaluating ANX005 in a Phase 2/3 trial in patients with GBS and Phase 2 trials in HD, ALS and wAIHA. ANX005 has been granted Orphan Drug and Fast Track designations from the FDA for the treatment of GBS.


ANX005summarized below:for the Treatmentof GBS

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Our Flagship Programs

Guillain-Barré Syndrome

Overview of Guillain-Barré SyndromeSyndrome

GBSisasevereacute inflammatory disease typically triggered by a preceding infection, in which aberrant auto-antibodies that recognize neurons or associated cells cause neuronal injury and acute paralytic neuropathy. In 2011, the estimated annual incidence of GBS was approximately 12,000 in North America and Europe. In 2019, there were 150,095 total cases of GBS worldwide, which was a 66% increase from the 90,249 cases recorded worldwide in 1990. The prevalence of GBS continues to increase with advancing age. In 2004, the annual economic cost of GBS in the United States was $1.7 billion, largely due to the permanent disability and mortality it can cause.

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There are currently no FDA-approved therapies for the treatment of GBS. Treatment guidelines published by the American Academy of Neurology recommend early initiation of IVIg or plasma exchange in patients diagnosed with GBS. IVIg and plasma exchange are the established standards of care in the Western world and parts of Asia. Although IVIg and plasma exchange have been shown to provide some benefit, significant unmet need still exists, and many patients, despite receiving the standard of care, are left with residual neurological disability, accompanied by chronic pain and fatigue.

The clinical course of GBS usually involves rapidly progressive weakness in the limbs culminating in neuromuscular paralysis within two to four weeks of onset. According to 2011 estimates, 20 to 30 percent30% of patients require mechanical ventilation, over 20 percent20% have permanent motor or sensory disability and 2 to 17 percent17% of cases result in death globally. Many patients with GBS require extensive monitoring and supportive care and will seek treatment in a hospital within a few days of onset of the disease. Because approximately a quarter of patients need artificial ventilation due to respiratory muscle weakness, and many develop autonomic disturbances, admission in an intensive care unit is frequentlynecessary.Symptomspeakwithinfourweeksastheauto-antibodyresponsedeclines,followedbyarecoveryperiodthatcanlastmonthsoryears,asthenervoussystemrepairsitself.

C1q is a key driver of pathogenesis in GBS

GBSisanacute,autoimmunediseasedrivenbyantibodiesthatleadtoactivationoftheclassical complementcascade.Pathologicalnerve-targetingauto-antibodies,whichmaybetriggeredbyaninfection,lead totheactivation ofC1qandtheclassical complement cascade. Pathological nerve-targeting auto-antibodies, which may be triggered by an infection, lead to the activation of C1q and the classical complement cascade. Studieshaveshownthatpathogenicauto-antibodiesarepresentintheserumandCSFandthatactivatedcomponentsofthecomplementcascadeare depositedonperipheralnervetissuefromGBSpatients.PeripheralnerverootsareimmersedinCSFasthey emergefromthespinalcordandareprominentsitesofdamageinGBS.Thefigurebelowillustrates the activationoftheclassicalcomplementpathwaywithinperipheralnervesinaGBSpatient.Theleftimageshows alowmagnificationviewofaperipheralnervefromaGBSpatientwithnumerousindividualnervefiberscoated withmembrane-damagingcomplementactivationproducts(C5b-9;darkstaining).ThemiddleimageshowsahighmagnificationviewofanindividualnervefiberwithdepositionofC3d(darkstaining),acomplement activationproductthatdirectsimmunecellattack. products (C5b-9; dark staining). Theright middle imageshowsahighpowerimage high magnification view ofanindividualnerve fiber with deposition of C3d (dark staining), a complement activation product that directs immune cell attack. The right image shows a highpower image of an individual nerve fiber being probed by an infiltrating immune cell (macrophage).

 immune

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 cell(macrophage).

WebelievethatbyblockingtheactivityofC1qearlyintheonsetofthedisease,wecanminimizethe neuronaldamagecausedbythesepathogenicauto-antibodies,inturnreducingthepatients’symptomsand accelerating their neurological recovery.theirneurologicalrecovery.


Neurofilamentlightchain (NfL), a marker of neurodegeneration,is highlyelevatedin GBS

NfL,an intracellular neuron-specific protein, has emerged as a well-accepted biomarker of nerve damage in disorders characterized by damaged or degenerating nerves. NfL is a subunit of neurofilaments, which are cylindrical proteins exclusively located in the cytoplasm of nerve cells and are released into the CSF and blood when nerves are damaged (illustration below). Recent ultrasensitive techniques, such as single-molecule array technology, have made it possible to accurately and quantitatively detect longitudinal changes of NfL in both blood and CSF, with very low

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 protein,hasemergedasawell-acceptedbiomarkerofnervedamageindisorderscharacterizedbydamagedordegeneratingnerves.NfLisasubunitofneurofilaments,whicharecylindricalproteinsexclusivelylocatedinthecytoplasmofnervecellsandarereleasedintotheCSFandbloodwhennervesaredamaged(illustrationbelow).Recentultrasensitivetechniques(e.g.,single-moleculearraytechnology)havemadeitpossibletoaccuratelyandquantitativelydetectlongitudinalchangesofNfLinbothbloodandCSF,withverylow

analyticalvariation.Theseassayproperties,inadditiontoneuron-specificity,positionNfLasanimportantdecision-enablingtoolinproof-of-conceptstudiesofneuroprotectiveagentsacrossawidevarietyofdiseases.

Neurofilament LightChain(NfL)isreleased from damaged nerve cells

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Elevated 

Elevated NfL levels correlate with current patient disability and predict patient outcomes in autoimmune neurological diseases such as GBS, multiple sclerosis, or MS, chronic inflammatory demyelinating polyneuropathy and multifocal motor neuropathy as well as in chronic neurodegenerative diseases such as Huntington’s disease, amyotrophic lateral sclerosis, spinal muscular atrophy, or SMA, frontotemporal dementia, and Alzheimer’s disease. Moreover, effective treatments for MS (e.g., ocrelizumab, natalizumab and fingolimod) and SMA (e.g., nusinersen) that prevent neurological disability in patients have been shown to significantly reduce NfL levels in these same patients. In patients with GBS, NfL is very highly elevated (in some instances, greater than 100-fold above normal). Retrospective and prospective studies in GBS patients have shown that NfL levels in CSF and serum may correlate with disease course, severity and prognosis in GBS.

Preclinical Development in GBS

As illustrated below, in a mouse model of severe GBS, ANX005 treatment blocked complement deposition on nerve terminals (left panel) and protected respiratory and motor function (right panel) when compared to an irrelevant immunoglobulin G, or IgG, isotype control antibody. A p-value is a measure of the statistical significance of the observed result. By convention, a p-value lower than 0.05 is considered statistically significant.

 levels

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 correlate

Respiratory and motor function

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 withcurrentpatientdisabilityandpredictpatientoutcomesinautoimmune neurologicaldiseasessuchasGBS,multiplesclerosis,orMS,chronicinflammatorydemyelinatingpolyneuropathyandmultifocalmotorneuropathyaswellasinchronicneurodegenerativediseasessuchas Huntington’sdisease,amyotrophiclateralsclerosis,spinalmuscularatrophy,orSMA,frontotemporaldementia,andAlzheimer’sdisease.Moreover,effectivetreatmentsforMS(e.g.,ocrelizumab,natalizumabandfingolimod) andSMA(e.g.,nusinersen)thatpreventneurologicaldisabilityinpatientshavebeenshowntosignificantly reduceNfLlevelsinthesesamepatients.InpatientswithGBS,NfLisveryhighlyelevated(insomeinstances, greaterthan100-foldabovenormal).RetrospectiveandprospectivestudiesinGBSpatientshaveshownthatNfL levelsin CSFand serummay correlatewith diseasecourse,severityand prognosisin GBS.

PreclinicalDevelopmentin GBS

Asillustratedbelow,inamousemodelofsevereGBS,ANX005treatmentblockedcomplementdeposition onnerveterminals(leftpanel)andprotectedrespiratoryandmotorfunction(rightpanel)whencomparedtoan irrelevantimmunoglobulinG,orIgG,isotypecontrolantibody.Ap-valueisameasureofthestatistical significanceoftheobservedresult.Byconvention,ap-valuelowerthan0.05isconsideredstatisticallysignificant.



Respiratoryandmotorfunction

Phase 1a Trial in Healthy Volunteers

ANX005wasinitiallyevaluatedinaPhase1adose-escalationsingle-dosetrialdesignedtoassesssafety, pharmacokineticsandpharmacodynamics.Thistrialwasconductedin27healthyvolunteersinAustralia.The dosinglevelsofANX005deliveredinthistrialrangedfrom1mg/kgto8.2mg/kg.Weterminatedthetrialin healthyvolunteersandtransitionedourclinicaldevelopmenttoevaluateANX005directlyinpatientswithGBS based on guidancefromthe FDAin orderto expedientlyadvance thisprogramin the United States.

Phase 1b Trial in GBS Patients

WehavecloselycoordinatedourclinicaleffortswithleadingresearchersoftheInternationalGBSOutcome Study,orIGOS,inpursuinganoveltherapyforGBS.Withthegoalofaidingthedevelopmentofeffective treatmentsforGBS,practitionersestablishedIGOSinMay2012,andhavecollectednaturalhistorydatafrom over1,750newly-diagnosedGBSpatientsworldwide.IGOSisaprospective,observational,multicentercohort studythataimstoidentifytheclinicalandbiologicaldeterminantsandpredictorsofdiseaseonsetaswellasthe subtype,courseandoutcomeofGBS.IGOSwasestablishedtohelpdevelopabetterunderstandingofthe mechanismofdiseaseprogressionandrecoveryandtoconductselectivetherapeutictrialstoimprovepatient outcomes.Thisnaturalhistorydatabaseisaninvaluableresourcetoclinicaldevelopment,facilitatingthedesign ofclinicaltrials,optimalselectionofendpoints,andpatientfollow-upforonetothreeyears.WeinitiatedourGBSclinicaldevelopmentinBangladesh,acountrywheretheincidenceofGBSisseveraltimeshigherthanin NorthAmericaandEuropeandwhere17%ofpatientsdiefromthediseaseand20%sufferpermanentdisability andareunabletowalk.Additionally,oursiteinBangladeshiswellsituatedtoconductclinicalresearchinGBS inamannercompliantwithgoodclinicalpractice,orGCP,requirements.AsofMarch2017,BangladeshhadenrolledmorepatientsinIGOSthananyothercountry,representingapproximately15%ofallenrolledpatients worldwide.

WeconductedaPhase1bplacebo-controlled,doseescalationtrial(n=31)ofANX005inGBSpatientsatatertiarycarehospitalinBangladesh,incompliancewithGCPasdescribedabove.Thetrialobjectivesincluded safetyandtolerability,dosinglevelsandtargetengagement, and included a follow up of eight weeks. The dosing levels of ANX005 delivered in this trial ranged from 3 mg/kg to 75 mg/kg. ANX005 was well tolerated, and no drug-related serious adverse events or drug-related discontinuations occurred. The most common adverse events were acute infusion-related reactions, or IRRs, which occurred in the majority of patients and presented as low grade, non-serious, transient skin rash. These acute IRRs were mitigated by standard anti-inflammatory pre-medications.

Results from the Phase 1b trial showed increasing serum levels of ANX005 and its duration in the circulation at increasing dose levels, and that the drug was present in the serum for up to three weeks at a dose of 75 mg/kg (left panel). When ANX005 was present in the circulation C1qfunctionwasfullyinhibited,andrapidlyreturnedtonormallevelsasANX005serumlevelsdeclined(right (right panelshowingdatafromapatientreceiving75mg/kg).


 

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img134458515_9.jpg

Much oftheproximalweaknessinGBSpatientsisduetoinvolvementofperipheralnerverootsthatareimmersedinCSF astheyexitthespinalcord.Hence,webelieveproductcandidatelevelsandtargetinhibition in CSFmaybeanimportantcontributorGBS patients is due toefficacy.Weobserved involvement of peripheral nerve roots thatANX005enteredthe are immersed in CSF as they exit the spinal cord. Hence, we believe product candidate levels and target inhibition in CSF may be an important contributor to efficacy. We observed that ANX005 entered the CSF of GBS patientstreatedwithdosesof18-75mg/kgofANX005,resultinginfullengagementofC1qinhibitionintheCSF(as (as shownbelow).

Inhibition 

Inhibition of C1q Observed in CSF at 18-75 mg/kg

 Observed in

img134458515_10.jpg 

 

In the Phase 1b trial in GBS patients, ANX005 treatment at doses that engaged C1q in both serum and CSF at(i.e., 18-75mg/kg

InthePhase1btrial dose) resulted inGBSpatients,ANX005treatmentatdosesthatengagedC1q a statistically significant early decline inbothserumandCSF(i.e.,18-75mg/kgdose)resultedinastatisticallysignificantearlydeclineinserumNfLlevelscomparedto placebo(2-4week (two to four-week posttreatmentp-value<0.05,leftpanelbelow).InthisPhase1btrial,wealsoexploredthe administrationofANX005onmultiplevalidatedclinicaldisabilitymeasuresincludingGBS-DisabilityScore,or GBS-DS,MedicalResearchCouncilMuscleStrengthScale,orMRC,andInflammatoryRasch-builtOverall DisabilityScale,orI-RODS,overaneight-weekperiod.WeobservedthatearlydeclineinNfLcorrelatedwith improvementintheGBS-DSattheendofthestudy(2-8week (two to eight-week posttreatmentp-value<0.05;rightpanelbelow). WebelievetheseresultssuggestthatANX005hadarapidimpactonthediseaseprocessbyameliorating antibody-inducednerve damage, likelywithin the firsttwo weeks of dosing.

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High Dose ANX005 (18-75 mg/kg) Led to
Significant Early NfL Reduction (Weeks 2 - 4)

Change in NfL Weeks 2 - 4 vs.

Overall Change in GBS-DS (Weeks 2 - 8)

img134458515_11.jpg

img134458515_12.jpg 

Delta NfL wk 2-4

* risastatisticalmeasureforthecorrelationoftwo variablesthat ranges from-1 to 1.Thecloserristo 1or-1,themorecloselythevariablesarerelated. Acorrelationof0.431isconsideredmoderate correlation.


Thoughthetrialwasnotpoweredforstatisticalsignificance,treatmentwithANX005resultedinconsistent, positivenumericaltrends,includinganimprovementinMRCscoreandthenumberofdaysofventilation.We observeda dose-dependenttrendfor improvementin MRCwithin the firstweek of treatment (as shown below).

 (as shownbelow).

Mean Change in MRC Score

Week 1 from Baseline

img134458515_13.jpg

Dose ANX005 (mg/kg)

Early 

Early improvementinMRCisknowntohavestrongprognosticimplications onlong-termfunctional recovery(modified (modified ErasmusGBSOutcomeScore).Inlinewiththispublisheddata,wefoundthatearly improvementinMRCcorrelatedwithpatients’disabilityscoresattheendofthePhase1btrial( (GBS-DS at week eight). This result is important because GBS-DS atweekeight).ThisresultisimportantbecauseGBS-DSistypicallyusedastheprimaryendpointinGBSregistrational studies.Inaddition,usingaresponderanalysis,28%ofpatientstreatedwithhighdoseANX005(18-75 (18-75 mg/kg)improvedbyatleastthreepointsonGBS-DSbyweek8 eight comparedto0%ofplacebo-treatedpatients(as (as shown below).PatientstreatedwithANX005showedatrendofimprovementonGBS-DSwhenusingameananalysis. Both resultsare promisingbut not statistically significant.

 significant.

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Based 

img134458515_14.jpg 

Based ontheresultsofthePhase1btrial,we selectedthe75mg/kgdoseofANX005for ongoing developmentinGBS.FollowingthecompletionofthePhase1btreatmentcohorts(through (through 75mg/kg),two unblindedexploratorycohortswereenrolledtoestablishhigherdoseandmultipledosesafetyandPK/PDto informsubsequentchronicdosingtrials.Thesetwoexploratorycohortswereasingledoseof 100 mg/kg, and two dosesof75mg/kgseparatedbyoneweek(150 (150 mg/kgtotal).Atthesehigherdoselevels,ANX005waswell-tolerated,andnodrug-relatedseriousadverseeventsordrug-relateddiscontinuationsoccurred;moreover,wedid notreachamaximumtolerateddose.Similarly,we observedfullinhibitionof C1qin serumand CSF,a reduction inNfLandtrendsofimprovementinclinicalmeasureswhencomparedtoplacebo;however,therewasno additionalimpacton theseclinicalmeasuresbeyond thatseen at 75 mg/kg.

TheresultsofthePhase1bdoseranging dose-ranging trialinGBSshowedthatANX005waswell-tolerated,fully inhibitedC1qinthebloodandCSFattargetdoses, anddemonstratedanearlyreductioninNfLlevels.DrugtreatmentwasassociatedwithatrendforearlyimprovementinMRC,andearlychangesinMRCsignificantly correlatedwithimprovedclinicalmeasuresinGBSpatients.Anadditionalkeylearningfromthestudyisthe


importanceofusingbaselineMRCforpatientstratification atthetimeofhospitalizationandstudyentry. AccountingforbaselineMRCstrengthenedtheimpactofANX005treatmentinthebiomarkerandclinical measures,demonstratingthatMRCwill be an importantstratificationtool in futureGBStrials.

Ongoing Development of ANX005 for GBS

We completed a DDI trial which demonstrated that concomitant use of ANX005 and IVIg in GBS patients was well-tolerated and achieved full target engagement. A randomized, placebo-controlled pivotal Phase 2/3 trial designed to evaluate the efficacysafety of ANX005 and efficacy in improving disability in GBS patients is ongoing, and we anticipate reporting data from this trial in 2023.

ANX005ongoing. Following a productive engagement with the FDA regarding the statistical analysis plan for the Treatmentongoing pivotal trial, we plan to increase the study population by approximately 40 patients for a total of Autoimmune Hemolytic Anemias

Overview of Autoimmune Hemolytic Anemias

Autoimmune hemolytic anemias, or AIHA, are characterized by the presence of auto-antibodies that bind red blood cells and activate the classical complement pathway. The temperature at which these auto-antibodies bind to red blood cells determines whether the hemolytic anemia220 patients. Expanded enrollment is labelled “cold” or “warm.” In both cases, the antibodies trigger classical complement activation, which tags red blood cells with complement components (e.g., C3d, C4d) for removal in the spleen or liver (via extra-vascular hemolysis) or, less commonly, leads to their direct lysis within blood vessels by the C5b-9 membrane attack complex (intravascular hemolysis). The “cold” forms of AIHA are knownexpected to be complement-mediated disorders, whereas complement is hypothesized to play a dominant role in a subset of patients with the “warm” form of AIHA. It is estimated that less than 5,000 people have the cold form while approximately 30,000 people have the warm form of AIHA in the United States. There are no approved treatments for AIHA in the United States; however, blood transfusions, steroids, rituximab, chemotherapies and splenectomies are currently used to treat patients with AIHA. It is estimated that up to 30% of patients require second-line treatment when treated with the standard of care treatment and approximately 11% of cases after symptom onset result in death.

Ongoing Developmentof ANX005in Autoimmune Hemolytic Anemias

We have found that ANX005 inhibited complement deposition on human red blood cells (left panel) and prevented direct red blood cell lysis (right panel) induced by sera from CAD patients as ex vivo models of extravascular and intravascular lysis, respectively.

WehaveobservedinbothpreclinicalstudiesandinourPhase1btrialinpatientswithGBSthattreatment withANX005resultedinnearcompleteinhibitionofC1q,asmeasuredinserumbythesameexvivohemolysis assayusedforhemolyticanemiaconditions.Thus,webelievethatANX005maybeabletoachievenearcompletesuppressionof complement-mediatedhemolysisin patientswith wAIHA.

We are conducting a non-interventional screening study in wAIHA patients to utilize complement activation markers in an effort to identify and select patients who may be more likely to respond to our anti-C1q therapy in our Phase 2 trial. The open label Phase 2 trial in wAIHA patients is designed to evaluate safety, tolerability, PK, pharmacodynamic impact and efficacy, as measured by biomarkers of hemolysis and changes in hemoglobin. We anticipate reporting data from this trialcompleted in the second half of 2022. We are also evaluating ANX0052023 with pivotal data anticipated in patients with CAD.


ANX005for the Treatmentfirst half of Huntington’sDisease2024.

Huntington’s Disease

Overview of Huntington’s DiseaseDisease

HDisanorphanhereditaryneurodegenerativediseasethatisfatalandforwhichtherearenoapproved treatmentsthatcanreverseorslowitscourseofprogression.HDsymptomstypicallybegintomanifestbetween the ages of 30 to 50 and progressas a devastatingneurodegenerativedisorder characterizedbyabnormal involuntarymovements,knownaschorea,spreadingtoallmuscles,progressivedementiaandpsychiatric manifestationssuchasdepressionandpsychosis.Ultimately,affectedindividualssuccumbtocardio-respiratory complications.Lifeexpectancyaftersymptomonsetisapproximately10to20years.Someofthesymptomsof HDsuch as choreaand depressioncan be managed with medications.

Approximately 25,000 to 35,000 people in the United States have HD. Estimates project that approximately 75,000 people in the United States and other major market countries will have HD by 2025. Because HD is a genetic

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disease in which an individual with medications.

Approximately25,000to35,000peopleintheUnitedStateshaveHD.Estimatesprojectthatapproximately 75,000peopleintheUnitedStatesandothermajormarketcountrieswillhaveHDby2025.BecauseHDisa geneticdiseaseinwhichanindividualwithasinglecopyofthedysfunctionalgenewilldevelopthedisease, everychildofaparentwithHDhasa50percent 50% chanceofinheritingthefaultygeneanddevelopingthedisease. Thereareanestimated200,000individualsintheUnitedStateswhohavea50percent 50% riskofdevelopingHD becauseoftheirfamilyrelationshiptoHDpatients.Itisestimatedthatonlyfivetosevenpercent 5-7% oftheseat-risk individualshavevoluntarilyundergonegenetictestingduetothedevastatingnatureofthediseaseandthelackof anyeffectivetreatments.Thedevelopmentofadisease-modifyingtherapycouldencourageat-riskpatientsto seekouttestingandtherebybothprovidehopetogenecarriersandexpandthenumberofpatientswhomay benefit from treatment.fromtreatment.

C1q is a key driver of pathogenesis in HD

HDiscausedbyageneticmutation,specifically,byexpansionofthenumberofcytosine-adenine-guanine,orCAG,nucleotidesequenceswithintheDNAofthehuntingtingene,whichleadstoproductionofamutant huntingtinproteinthatisthoughttobe neurotoxicand promotethe degenerationof neurons. Abovea thresholdof 35CAGrepeats,theageofdiseaseonsetisinverselycorrelatedwiththenumberofCAGrepeats.TheclassicalcomplementcascadeisactivatedinHDpatientsandisassociatedwithprogressivesynapseloss.Wehypothesize thatC1qplaysanimportantroleinthedegenerativeprocessbytaggingweakenedsynapsesandtriggeringa neuroinflammatoryresponsethatleadstoaberrantsynapselossandprogressiveneuronaldestruction.Asshown below,weobservedthatincreasedcomplementactivationinHDpatients(asmeasuredbythecomplement activationmarkerC4ain CSF)was associatedwith diseaseprogression.


NfLcascade is elevatedactivated in HD patients and is associated with progressive synapse loss. We hypothesize that C1q plays an important role in the degenerative process by tagging weakened synapses and triggering a neuroinflammatory response that leads to aberrant synapse loss and progressive neuronal destruction. As shown below, we observed that increased complement activation in HD patients (as measured by the complement activation marker C4a in CSF) was associated with disease progression.

Both CSF(shownbelow)andplasmalevelswerefoundtobeelevatedinHDpatientscomparedtohealthy controls,consistentwithobservationsinotherneurodegenerativediseases.Furthermore,plasmaNfLisincreased withadvancingdiseaseseverityandincreasesatanearlieragewithagreaternumberoftheCAGrepeats.NfL levelsinbothplasmaandCSFcorrelatebetterthanlevelsofthemutanthuntingtin,ormHTT,proteinitself,with clinicalfunctional/cognitivemeasuressuchastotalUnifiedHuntington’sDiseaseRatingScaleandwithbrain volumemeasuresasdeterminedbyMRI.Inaddition,whileCSFmHTTlevelsaccuratelydifferentiatecontrols andHDmutationcarriers,onlyNfLinCSFandplasmaisabletodistinguishpresymptomaticfromsymptomatic (manifest)HDpatients,suggestingthatNfLmightbeoneoftheearliestdetectableabnormalitiesinthe progressiontomanifestHD.Ofnote,NfLlevelswereshowntoreflectfuturepatientoutcomesaswellascurrent disability.

Increased NflintheCSF withDiseaseProgressionimg134458515_15.jpg 

Progressive synapse loss in HD patients

Asshownbelow,researchersobservedinpost-mortemtissuefromHDpatientsthatthenumberofsynapses onneuronsconnectingspecificregionsofthebrain(the (the cortexandstriatum)werereducedcomparedtohealthy controls,withpatientsmoreadvancedinthediseaseprocess(Huntington’s (Huntington’s diseasestage4)showinggreaterloss ofsynapsesthanearlierstagepatients(Huntington’s (Huntington’s diseasestage2).Theseresultsareconsistentwithour hypothesisthatcomplementactivationleadsto synapse elimination and neuronal damage.

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 and neuronaldamage.

ProgressiveSynapse LossinHuntington’sDisease Synapse number (% Control)

 (%

img134458515_16.jpg 

 Control)

Development of ANX005 protected against synapse loss and reduced NfL in a preclinical model of HD

IntransgenicmousemodelsofHD,weassessedthepotentialofperipherallyadministeredANX005to inhibitactivationoftheclassicalcomplementcascadeand protectagainstsynapse loss. Asshownbelow, ANX005treatmentreducedtheamountofactivatedcomplementfactorC3dthatwasdepositedonsynapsesin thestriatum


(thesameregionofthebrainasaffectedinHDpatients;leftpanel),reducedCSFlevelsofNfL (middlepanel),andreducedthelossofsynapses(rightpanel).Webelievethesethreelinesofevidencesupport thehypothesisthatANX005blockscomplement-mediatedneurodegenerationinHDandcanleadtopreservation of neuronalsynapses.

Developmentof ANX005in HD

We are currently conducting anopen-labelIn June 2022, we announced final data from the Phase 2 trial of ANX005 in patients with HD. The Phase 2 multi-center, open-label clinical trial evaluated ANX005 administered intravenously for a six-month dosing period in patients with, or at risk for, early manifest HD, followed by a three-month follow-up period. The primary outcome measures of the studytrial in HDwere safety and tolerability of ANX005; the pharmacokinetics of ANX005, as measured by serum and CSF concentrations; and pharmacodynamics effects, as measured by C1q, C4a and NfL serum and CSF concentrations. The study enrolled a total of 28 patients, to evaluateANX005’sabilitytoinhibitC1qin23 of whom completed both six-months of treatment and the CSFsubsequent three-month follow-up period.and

toreducelevelsofserumandCSFNfL. In January 2022, we reported interim results from patients who completed the 24-week treatment period. This interim analysisFinal data showed that treatment with ANX005 was generally well-tolerated, as of the safety cutoff date of October 17, 2021, with full target engagement of C1q in both serum and cerebrospinal fluid (CSF)CSF observed throughthroughout the dosingsix-month treatment period and well into the three-month follow-up period. Disease progression was stabilized in the overall HD patient population for the entire nine months of the study, as of December 14, 2021. Evaluable patients maintained clinical function, as measuredassessed by changes in meanboth Composite Unified Huntington's Disease Rating Scale (cUHDRS) and Total Functional Capacity (TFC), relative tothe two primary clinical measurement scales for HD. Additionally, HD patients with higher baseline after sixcomplement activity, as measured by elevated levels of C4a in CSF, demonstrated a rapid clinical benefit, as assessed by both cUHDRS and TFC, that was sustained over the entire nine months of treatment, and improvementthe study. Improvement in cUHDRS and TFC in HD patients with higher baseline complement was observed in more than half of all evaluable patientsevident six weeks after dosing initiation and in 75% of evaluable patients who showed excess complement activity at baseline.was maintained over nine months through the on-treatment and follow-up periods. Plasma and CSF NfL levels observed after six months of treatment remained generally consistent through the nine-month study and were comparable to NfL levels described in published natural history data for HD patients. Overall, these interim findings appeared

img134458515_17.jpg 

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img134458515_18.jpgimg134458515_19.jpg 

Post-hoc evaluation of two independent markers of neuroinflammation, C3 and YKL-40, showed that treatment with ANX005 led to supporta decrease in levels of both biomarkers.

img134458515_20.jpg 

Based on the scientific hypothesis of our scientific founder, the late Ben Barres, who believed that blocking C1q protects synaptic loss and can lead to rapid functional impact on clinical outcomes in neurodegenerative diseases.

The Phase 2 trial remains ongoing,results and we anticipate reporting full data from all patients treated, including data froma productive engagement with the three-month follow-up period, in the second quarter of 2022. Pending results from the full dataset,FDA, we plan to evaluate the opportunity foradvance ANX005 into a randomized, double-blind, placebo-controlled Phase 2/3 trial of ANX005 in HD patients.

ANX005for the Treatmentof ALS

Overview of ALS

ALSisadevastatingneurodegenerativediseasewithnocurativetreatmentthataffectsabout30,000patients worldwide.TherearerarefamilialformsofALS(e.g.,duetoDNAmutationsintheSOD1andC9ORF72 genes),butthemajorityofALScasesareconsideredsporadic.Thediseaseisamotorneurondiseaseimpacting boththecentralandperipheralnervoussystems.ALScausesprogressiveweaknessoflimb,respiratory, swallowingandspeakingmuscles,anddeathtypicallyoccurswithintwotofiveyearsaftersymptomonset. Thereisevidencethatneurodegenerationbeginsperipherally,attheneuromuscularjunction,orNMJ,andthen proceedsproximallytoinvolvetheperipheralmotornerves,ventralnerveroots,spinalcordandbrainmotor cortex(“dyingback”neurodegeneration).TheNMJisaspecializedsynapsebetweenperipheralmotornerveand musclefiber.As


illustratedbelow,“dyingback”oftheperipheralnerveinALSisassociatedwithC1q/classical complementdepositionon the NMJ.

C1qinvolvementin ALS

C1q and classical pathway activation is elevated in ALS patients. Specifically, C1q deposition has been noted in NMJs and C4d levels are increased in the CSF of ALS patients.

As shown below in a preclinical model of ALS, muscle levels of C1q (at NMJs) increased with age (left panel) and were observed to correlate with decline in muscle strength (right panel).

OurgoalwithourC1qinhibitoristopreventlossofNMJsandhenceprevent“dyingback” neurodegenerationofmotornervesinpatientswithALS.Ofnote,thereissignificantoverlapintheperipheral nervestructuresthatareinvolvedinbothGBSandALS;therefore,webelieveourANX005pharmacokinetics and pharmacodynamicsdata in GBSpatientscan be extrapolatedto ALSpatients.


Likewise,inanexperimentalmodelofSMA,anotherperipheralnervedegenerativediseasethatis pathologicallysimilartoALS,wefoundthattreatmentwithanti-C1qantibody(mouseprecursorofANX005) protectedagainstsynapselossandimprovedmotorfunction.Thesameperipheralnervepathwayisinvolvedin GBSand ALS,as illustratedbelow.

Thesameperipheralnerve pathwayisinvolved inGBSandALS

NfL is elevated in ALS patients

ALSpatientshavesubstantialelevationsofNfLinbothCSFandserumcomparedwithcontrolsandpre-symptomaticmutationcarriers.InALSpatients,serumlevelsofNfL increaseintheyearpriortoonsetofdisease symptoms(seebelow).Inaddition,ithasbeenobservedthatNfLlevelsinALSpatientscorrelatebothwith currentdisabilityand futurepatientoutcomes.

Serum NfL Elevated inALS Patientsa Year PriortoSymptom Onset

Developmentof ANX005in ALS

We are currently conducting an open-label Phase 2 trial in ALS patients to evaluate ANX005’s ability to inhibit C1q in the CSF and to reduce NfL levels in serum in ALS patients. We anticipate reporting data from this trial in 2023. Based on the results of this trial, we will evaluate whether to initiate a potential registrational program for ALS.

If either of the HD or ALS Phase 2 trials are successful, we will consider proof-of-concept studies in other CNS neurodegenerative indications,suchasAlzheimer’sdisease,frontotemporaldementiaandprogressivemultiplesclerosis.


Our Second Product Candidate, ANX007

ANX007isaninvestigationalmonoclonalantibodyantigen-bindingfragment,orFab,thatisdesignedtopotentlybindtoC1qandinhibitactivationoftheclassicalcomplementcascade.WeactivatedanINDforANX007in2018andaredevelopingANX007asanintravitrealinjectionforophthalmicindicationssuchasglaucomaandgeographicatrophy.WehaveconductedaPhase1btrialofANX007inpatientswithglaucoma,andbasedontheseandpreclinicalstudyresults,webelieveANX007mayhavepotentialtotreatpatientswithGA.

ANX007 for the Treatment of Ophthalmic Diseases, including Glaucoma and Geographic Atrophy

Overview of Glaucoma

Glaucoma is a major cause of blindness and results from progressive loss of neurons in the retina called Retinal Ganglion Cells, and optic nerve degeneration. A frequent risk factor for glaucoma is elevated intraocular pressure, or IOP, but there are patients with “normotensive” glaucoma who have normal IOP. Patients with glaucoma have progressive loss of peripheral vision, which can eventually resultHD in functional blindness.

It is estimated that over three million people in the United States have glaucoma but only half of these people have been diagnosed. More than 120,000 people in the United States are blind due to glaucoma, accounting for 9 to 12% of all cases of blindness.Theworldwideprevalenceofglaucomahasbeenestimatedto beover60millionpeople.Glaucomaisadiseasethatismorefrequentlyfoundinolderadultswithrates increasingseveralfoldbetweenages50and70.Similartootherneurodegenerativediseases,theoverall prevalenceof glaucomais projectedto increaseas populationsage worldwide.

Glaucomaisoneofthelargestsegmentsoftheglobalophthalmicmarketandhasasignificantimpactonthe qualityoflife.Patients’abilitytoperformdailyactivitiesbecomesincreasinglylimitedasthediseaseprogresses. Individualswithglaucomaaremorelikelytoexperiencefalls,tobeinvolvedinmotorvehiclecollisions,to sufferdepressionand to requireadmissionto a nursinghome.

ThegoalofexistingtherapiesforglaucomaisreductionofIOP.IOP-loweringtreatmentsaretypically administeredintheformofeyedrops,andpatientsmayrequiresurgerytofacilitatedrainageoffluidintheeye. However,approximatelytenpercentofpeoplewho receiveappropriatetreatmentneverthelesscontinueto experienceprogressivevisionloss.Theopticnervedamageobservedinglaucomaisbelievedtobeirreversible, highlightingthe need for neuroprotectivetherapiesthatcan slow or stop the damageto opticnerves.

Role of C1q in Glaucoma

C1q,theinitiatingmoleculeoftheclassicalcomplementcascade,hasbeenimplicatedintheprogressionof neurodegenerativedisease,includingglaucoma.Thelabofourscientificfounder,Dr.BenBarres,reportedthat C1qaccumulatedonretinalneuronsandtheirsynapsesearlyinthediseaseprocessinachronicmousemodelof glaucoma,beforetheonsetofotherobservablechanges.C1qaccumulationcontinuedassynapseswerelost, followedbylossoftheopticnerve.SubsequentstudiesshowedthatgeneticdeletionofC1qprotectedagainst opticnerve damagein a chronicmouse modelof glaucomaat 12 monthsof age (leftpanel, figurebelow).


UsingpharmacologicalinhibitionofC1qwithANX007,weobservedthesefindingsinadifferentmouse modelofglaucomainvolvingacuteelevationofIOP.Inthismodel,animalsreceivedanintravitrealinjectionof theM1-FabmurineprecursorofANX007atthetimeofIOPelevation,followedbyaseconddoseoneweek later,andtheirretinaswereexaminedatweek2.Asshownintherightpanelofthefigurebelow,intravitreal administrationof ANX007protectedagainstopticnerve damage.2023.

Geographic Atrophy

IndependentinvestigatorsobservedelevatedlevelsofC1qandothercomponentsoftheclassical complementcascadeintheinnerretinalsynapselayerof34outof34humandonoreyesfrompatientswith glaucoma,as illustratedbelow. C1qwas not found in donor eyes fromindividualswhodid not have glaucoma.

Overview of Geographic Atrophy

GAisan advanced, vision-threatening form of age-related macular degeneration, or AMD, and is a chronic, progressive disease of the macula that results in loss of central vision. The disease typically affects one eye first, with a high likelihood of it occurring in the second eye over time.

There are two forms of AMD, “dry” AMD and “wet” AMD. Dry AMD is the most common form, representing approximately 85% to 90% of all AMD cases. Geographic atrophy represents the advanced form of dry AMD and is characterized by progressive atrophy of retinal pigment epithelial cells, overlying photoreceptors and underlying choriocapillaries. An early feature of the disease is the presence of drusen, which is comprised of extracellular yellow deposits at the back of the retina.


GA accountsforabouttenpercent 10% oflegalblindnessrelatedtoAMD.Approximatelyonemillion individualsintheUnitedStatesandfivemillionindividualsworldwidesufferfromgeographicatrophy.Aswith AMD, the prevalence

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 prevalence

ofgeographicatrophy increaseswithage. There are no approved therapiesto preventeither the onset or progressionof geographicatrophy.

Role of C1qand Complement in Geographic Atrophy

Genome-wideassociationstudieshavestronglyimplicatedmultiplecomponentsofthecomplementcascadein AMDandgeographicatrophy.Forexample,specificallelesofthegeneforC3canincreasethelikelihoodof developingAMDby50percent. 50%. Histopathologicalinvestigationshavealsoobservedthepresenceofcomplement componentsingeographicatrophy.ThesestudieslargelypointtoaroleofexcessiveC3activityindisease,butdonot indicatehowC3isbeingactivated(classical, (classical, lectinoralternativepathways).Wehaveidentifiedapotentialdualroleof C1qandtheclassicalcascadeasanimportantcomplement-activatingsystemingeographicatrophy.First,wefound thatC1qstronglyaccumulated on photoreceptorcell synapses with normal ageor disease, as shown below (leftpanels) panel), implicatingC1q’sroleinexcessivesynapsepruningandcomplement-mediatedneurodegeneration.Second,C1qand C1qligands,suchasC-reactiveprotein,alsoaccumulatedintheretinabelowphotoreceptorcellsinassociationwith drusen(extracellular (extracellular membraneandproteindebrisassociatedwithgeographicatrophy;rightpanel).Theseresults suggestthatthephotoreceptorneuronsandpigmentedretinalepithelialcellscelltypesthatarebothlostinGAare sandwichedbetweendepositsofC1qandthattheclassicalcomplementcascademayhaveanongoingandpathogenic role in GA by activating C3.

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In support of this hypothesis, we found that either deletion or pharmacologic inhibition of C1q was protective in an animal model of photoreceptor neuron loss induced by photo-oxidation, as shown below. Further, components of the classical complement cascade have been associated with photoreceptor cells in human GA tissue (C4 and C3) and implicated in photoreceptor cell targeting with an in vitro assay. Finally, C1q is locally produced within the retina during disease by infiltrating immune cells, indicating that its pathogenic role may be amenable to local inhibition of C1q. As described above, we believe inhibition of C1q would block all key components of the classical cascade, including C1q, C4, and C3 involved in immune cell attack and synapse pruning, as well as C5 involved in direct membrane damage.

As shown below, C1q inhibition was protective of photoreceptor cells and retinal function in a model of photoreceptor cell damage induced by light.in

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 a

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model of GA.Phase 1b Trial in Glaucoma to Support Development in GA


DevelopmentWe completed single-ascending dose (n=9) and sham-controlled multiple dose (n=17) studies of intravitreal ANX007 in patients with glaucoma to evaluate safety, tolerability, pharmacokinetics and target engagement. These patients had aqueous humor taps so that ocular fluid could be analyzed for levels of ANX007 and free C1q immediately prior to first dose (day 1) and prior to second dose (day 29). The studies showed that ANX007 was well-tolerated at all doses (1 mg, 2.5 mg and 5 mg) and achieved complete suppression of C1q at 2.5 mg and 5 mg, as illustrated below. We believe these results suggest that ANX007 can be dosed monthly or potentially less frequently in future Phase 2 efficacy trials. We are exploring further development of ANX007 that could enable patients to be dosed as infrequently as every six months.

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Development of ANX007 for OphthalmicGADiseases

WehavecompletedaBased on our Phase1btrialofANX007inpatientswithglaucoma.BasedonourPhase1bclinical resultsinglaucoma,ourpreclinicaldatashowingprotectioninthreeretinalneurodegenerationanimalmodels, (glaucoma,opticneuritisandGA),andourknowledgeofC1qbiologyinthissetting,weinitiated a Phase 2 trial of ANX007in GA. Our rationaleto pursue ANX007 for GA includes:

The classical complement pathway is implicated in GA by human genetics, and C1q and C4 are associated with pathology in human GA tissue. C1q is produced locally in the eye by infiltrating immune cells and may be more amenable to local inhibition by intravitreal administration of ANX007.
The potential role of C1q in GA may be dual-purpose, resulting in both complement-mediated neurodegeneration and localized tissue damage unique to the eye. Local administration of ANX007 has

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 for GAincludes:

The classical complement pathway is implicated in GA by human genetics, and C1q and C4 are associated with pathology in human GA tissue. C1q is produced locally in the eye by infiltrating immune cells and may be more amenable to local inhibition by intravitreal administration of ANX007.

The potential role of C1q in GA may be dual-purpose, resulting in both complement-mediated neurodegeneration and localized tissue damage unique to the eye. Local administration of ANX007 has been shown to be protective in animal photoreceptor neuron loss and achieved complete C1q inhibition in patients for 1-2 months.

There is a well-establishedclinicaland regulatorypath for development.

Phase 1b Trial in Glaucoma

Wecompletedsingleascendingdose(n=9)andsham-controlledmultipledose(n=17)studiesofintravitreal ANX007inpatientswithglaucomatoevaluatesafety,tolerability,pharmacokineticsandtargetengagement. ThesepatientshadaqueoushumortapssothatocularfluidcouldbeanalyzedforlevelsofANX007 andfreeC1q immediatelypriortofirstdose(day1)andpriortoseconddose(day29).ThestudiesshowedthatANX007was well-toleratedatalldoses(1mg,2.5mg,5mg)andachievedcompletesuppressionofC1qat2.5mgand5mg, asillustratedbelow.WebelievetheseresultssuggestthatANX007canbedosedmonthlyorpotentiallyless


frequentlyinfuturePhase2efficacytrials.WeareexploringfurtherdevelopmentofANX007thatcouldenablepatientsto be dosed as infrequentlyprotective in animal photoreceptor neuron loss and achieved complete C1q inhibition in patients for 1-2 months.

There is a well-established clinical and regulatory path for development.

as every six months.

Ongoing Phase 2 Trialin Geographic Atrophy

Arandomized, controlledPhase2trial inGApatients whoareatahighriskof progression is ongoing, and weanticipatereportingdatafromthistrialin2023.Priornaturalhistorydatasimilartothat foundinotherrecentlargePhase 3 trials may provide a wealth of natural history data from nearly 2,000 patients on how to successfully enrich fast progressors of GA to enable an efficacy read-out within a one-year time period.ongoing. The Phase 2 trial is designed to evaluate clinical effect of ANX007 on slowing of GA lesion growth over a one-year treatment period, leveraging the natural history data and patient selection criteria of prior GA trials. Enrollment in the Phase 2 trial was completed in early 2022, and initial data from the treatment-period portion of the trial are anticipated in the first half of 2023, with full data after the conclusion of the six-month off-treatment period anticipated by the end of 2023.

Our Third Product Candidate, ANX009ANX1502

ANX009Overview of ANX1502

ANX1502 is a novel small molecule inhibitor of classical complement designed for oral administration in a range of chronic autoimmune diseases. ANX1502 converts to the active compound, ANX1439, on administration and delivers a highly potent and selective inhibitor of the activated form of C1s—part of the C1 complex that initiates the classical pathway. The active compound has been shown to have a high affinity to C1s and demonstrate a robust functional inhibition of the classical pathway.

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Role of C1s in Complement-Mediated Autoimmune Diseases

The C1 complex is responsible for the activation of the classical pathway and is comprised of C1r, C1s and C1q. As part of the disease process, once activated, C1s is responsible for cleaving C4 and C2, key amplification components of the classical cascade. We believe that by stopping C1s from cleaving C4 and C2 with ANX1502, we will be able to block the classical cascade to reduce levels of inflammation, slow disease progression and potentially impact disease outcomes for patients.

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Ongoing Phase 1 SAD Trial of ANX1502

We are evaluating ANX1502 in an ongoing Phase 1 SAD trial in healthy volunteers. In the SAD trial, a single dose of 450 mg has achieved target drug levels in plasma in patients, consistent with twice-daily dosing as of October 23, 2022. Additionally, ANX1502 has been generally well-tolerated.

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The SAD trial is ongoing to identify the maximum tolerated dose, and in parallel we are conducting a MAD trial of ANX1502 in healthy volunteers. We believe these efforts to characterize dosing properties of ANX1502 will lead to a proof-of-concept study in patients with CAD in the second half of 2023, which is supported by positive data generated by ANX005 in CAD patients in a Phase 2 signal-finding trial. We also plan to expand development into additional autoimmune indications with strong scientific rationale, including MMN, in the first half of 2024.

Development of ANX1502 for Autoimmune Disease

ANX1502 for Cold Agglutinin Disease (CAD)

Autoimmune hemolytic anemias, or AIHA, are characterized by the presence of auto-antibodies that bind red blood cells and activate the classical complement pathway. The temperature at which these auto-antibodies bind to red blood cells determines whether the hemolytic anemia is labeled “cold” or “warm.” In both cases, the antibodies trigger classical complement activation, which tags red blood cells with complement components (e.g., C3d and C4d) for removal in the spleen or liver (via extra-vascular hemolysis) or, less commonly, leads to their direct lysis within blood vessels by the C5b-9 membrane attack complex (intravascular hemolysis). There are no approved treatments for AIHA in the United States; however, blood transfusions, steroids, rituximab, chemotherapies and splenectomies are currently used to treat patients with AIHA. It is estimated that up to 30% of patients require second-line treatment when treated with the standard of care treatment and approximately 11% of cases after symptom onset result in death.

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CAD is a form of AIHA that affects approximately 5,000 people in the United States. We evaluated ANX005 in a Phase 2 study in patients with CAD and showed (n=3) that ANX005 was generally well tolerated for up to one year, the longest treatment duration of ANX005 to date. Additionally, ANX005 achieved full target engagement, completely inhibiting C1q and downstream complement components – consistent with ANX005 in other indications, and positive outcomes were observed in all CAD patients.

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Based on these data, we plan to initiate a proof-of-concept study with ANX1502 in patients with CAD in 2023.

ANX1502 for Multifocal Motor Neuropathy (MMN)

MMN is a slowly progressing motor neuropathy disease characterized by progressive asymmetric distal weakness and muscle wasting over time. There are approximately 12,000 people affected by MMN in the United States and EU, and the disease primarily affects middle-aged men. The disease is driven by complement-activating autoantibodies against GM1, a ganglioside enriched in peripheral nerves, and is most often characterized by a motor nerve conduction block. Patients are often treated with IVIg; however, progressive nerve damage continues, and patients will require life-long and time-consuming treatment.

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There is a strong rationale for C1 inhibition as a therapy for MMN. As part of the disease process, when anti-GM-1 ganglioside antibodies bind to peripheral nerves, C1q, C4b and C3b deposit on the nerve surface and contribute to progressive nerve damage. Complement deposition can be measured in an ex vivo assay using patient serum exposed to purified GM-1 on an assay plate (Figure below, left panel), and the degree of complement deposition activity

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correlates with the patients’ disease severity (middle panel). Blocking C1q activity protects against damage on cultured neurons in the presence of MMN autoantibodies (right panel).

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Based on this scientific rationale, we plan to initiate a randomized, double-blind trial assessing the
efficacy of ANX1502 compared to IVIg in the first half of 2024. The trial will be designed to assess the safety and tolerability of ANX1502 in the MMN patient population. We will plan to assess measures of peripheral muscle strength using Medical Research Council sum score to evaluate global muscle strength, as well as hand-held dynamometry and patient function.

Our Additional Programs

ANX005 for ALS

Overview of ALS

ALS is a devastating neurodegenerative disease with no disease modifying treatment that affects about 30,000 patients worldwide. There are rare familial forms of ALS (e.g., due to DNA mutations in the SOD1 and C9ORF72 genes), but the majority of ALS cases are considered sporadic. The disease is a motor neuron disease impacting both the central and peripheral nervous systems. ALS causes progressive weakness of muscles involved in limb movement, respiratory activity, swallowing and speaking. Death typically occurs within two to five years after symptom onset. There is evidence that neurodegeneration involves both central and peripheral synapses. The NMJ is a specialized

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synapse between peripheral motor nerve and muscle fiber. As illustrated below, “dying back” of the peripheral nerve in ALS is associated with C1q / classical complement deposition on the NMJ.

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C1q involvement in ALS

C1q and classical pathway activation is elevated in ALS patients. Specifically, C1q deposition has been noted in NMJs and C4d levels are increased in the CSF of ALS patients.

As shown below in a third-party preclinical model of ALS, muscle levels of C1q (at NMJs) increased with age (left panel) and were observed to correlate with decline in muscle strength (right panel).

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Our goal with our C1q inhibitor is to prevent both the central and peripheral loss of synapses. Of note, there is significant overlap in the peripheral nerve structures that are involved in both GBS and ALS; therefore, we believe our ANX005 pharmacokinetics and pharmacodynamics data in GBS patients can be extrapolated to ALS patients.

Likewise, in an experimental model of SMA, another disease with both central and peripheral aspects of nerve damage, we found that treatment with anti-C1q antibody (mouse precursor of ANX005) protected against synapse loss and improved motor function. The same peripheral nerve pathway is involved in GBS and ALS, as illustrated below.

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The same peripheral nerve pathway is involved in GBS and ALS

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NfL is elevated in ALS patients

ALS patients have substantial elevations of NfL in both CSF and serum compared with controls and pre-symptomatic mutation carriers. In ALS patients, serum levels of NfL have been observed to increase in the year prior to onset of disease symptoms (see below). In addition, it has been observed that NfL levels in ALS patients correlated both with current disability and future patient outcomes.

Serum NfL Elevated in ALS Patients a Year Prior to Symptom Onset

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ANX005 Preliminary Phase 2a Data

We are currently conducting an open-label Phase 2 trial in ALS patients to evaluate the ability to inhibit C1q in the CSF and to reduce NfL levels in serum with ANX005. Preliminary data as of a cutoff date of December 6, 2022, from our ongoing Phase 2a trial (n=8) showed that treatment with ANX005 resulted in a reduction in NfL (left panel) and slowing of disease progression (right panel), as measured by reductions in revised ALS functional rating scores, during the initial 12-week on-treatment period, followed by an increase in disease progression while off treatment.

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Enrollment in our Phase 2a trial is ongoing with full data expected in 2023.

Lupus Nephritis

Overview of LN and Role of C1q

LN is one of the most serious complications of systemic lupus erythematosus (SLE). It occurs when the immune system mistakenly attacks the kidneys, leading to inflammation and possibly to organ damage. Inflammation of the kidneys can harm the ability of the overall renal system to properly remove waste from blood, maintain the correct amount of body fluids, and regulate hormone levels for controlling blood pressure and blood volume. LN affects approximately 60,000 people in the United States each year.

In active disease, pathogenetic auto-antibodies against C1q (PACAs) enhance LN disease activity by enhancing C1q activity and amplifying kidney inflammation and damage.

ANX009 for LN

ANX009 is designed to potently bind to C1q in the circulation and selectively inhibit activation of the classical complement cascade.cascade in the blood stream. ANX009 is a Fab formulated for subcutaneous delivery with a goal of enabling chronic dosing for antibody-mediated autoimmune diseases of blood and vascular structures. We believe that the inhibitory activity of ANX009 and its on/off design may benefit patients with hematological autoimmune disorders, including the glomerular inflammation associated with LN.

We are evaluating ANX009 as a treatment option for a subset of lupus nephritis patients who are at a high risk of renal flare due to pathogenic anti-C1q antibodies in the circulation, and who we believe may respond to treatment with our anti-C1q approach. Importantly, we are taking a precision medicine approach for patients with LN who have high baseline complement activity, and we have identified a potential plasma biomarker that identifies lupus nephritis patients with ongoing early classical complement cascade activation.

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 is

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We have observed that daily subcutaneous administration of ANX009 fully inhibited C1q functional activity in the serum of non-human primates. Its activity occurred rapidly after the first dose and this activity rapidly reversed after dosing was stopped.a

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Fabdesignedforsubcutaneousdelivery,andwaswelltoleratedinpreclinicaltoxicologystudies.APhase 1 FIHfirst-in-human clinical trial was completed in 2021 and data showed that ANX009 was well toleratedwell-tolerated, consistent with preclinical toxicology studies, and showeddemonstrated complete and sustained inhibition of circulating C1q, inhibition, supporting potential twice weeklytwice-weekly subcutaneous administration.

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Ongoing Development of ANX009 for Future Autoimmune Indications

WearedevelopingANX009to potentiallyenablechronicdosing in antibody-mediated autoimmunediseases such ashemolyticanemias, wAIHAandCAD.Inaddition,weareevaluatingANX009asatreatmentoptionforasubsetoflupusnephritis patientswhoareatahighriskofrenalflareduetopathogenicanti-C1qantibodiesinthecirculation,andwho we believe mayrespondtotreatmentwithouranti-C1qapproach.Forthispurpose,we


haveidentifiedaplasma biomarkerthatidentifieslupus nephritispatientswith ongoing earlyclassicalcomplementcascadeactivation.LN

Wehaveobservedthatdailysubcutaneousadministrationof are evaluating ANX009fullyinhibitedC1q functionalactivity in an ongoing Phase 1b signal-finding trial designed to assess theserumofnon-humanprimates.Itsactivityoccurredrapidlyafterthefirstdoseandthisactivityrapidly reversedafterdosing was stopped.

Webelieve that ANX009’s inhibitory activity safety and its on/off function may benefittolerability of ANX009 in patients with hematological autoimmune disorders. Importantly,LN, as well as explore impact on complement pharmacodynamic markers,

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exploratory markers of renal tissue damage and clinical function. Enrollment in the use of plasma biomarkers that define an active complementsignaturewillallowustotakeaprecisionmedicineapproachtoidentifypatientsappropriatefor anti-C1qtherapy.

Our Next-Generation Product Candidates

Wearedevelopingnext-generationproductcandidates,includingANX105,aninvestigationalmonoclonalantibodydesigned to have enhanceddosingandPKpropertiesfacilitatinguseinchronicneurodegenerativediseases.We plan to initiate a FIH trial of ANX105is ongoing with data anticipated in the first half of 2022 with data expected in 2023. Oursmall

ANX105molecule program is targeting compounds suitable

We are developing our next-generation product candidate, ANX105, an investigational full-length mAb formulated for oralintravenous administration. We designed ANX105 to have enhanced dosing for theand PK properties to enable its use as a chronic treatment of chronicfor autoimmune and neurodegenerative diseases. We are developing ANX1502,evaluating ANX105 in an investigational oral small molecule for the treatment of autoimmune indications, and plan to initiate a FIH clinicalongoing Phase 1 SAD trial in the second half of 2022 withhealthy volunteers and expect to report initial clinical data anticipated in 2023.


Intellectual Property

Our intellectual property is critical to our business and we strive to protect it, including by obtaining and maintaining patent protection in the United States and internationally for our product candidates, new therapeutic approaches and potential indications, and other inventions that are important to our business. Our policy is to seek to protect our proprietary and intellectual property position by, among other methods, filing U.S. and foreign patent applications related to our proprietary technology, inventions and improvements that are important for the development and implementation of our business. We also rely on the skills, knowledge and experience of our scientific and technical personnel, as well as that of our advisors, consultants and other contractors. To help protect our proprietary know-how that is not patentable, we rely on confidentiality agreements to protect our interests. We generally require our employees, consultants, scientific advisors and contractors to enter into confidentiality agreements prohibiting the disclosure of confidential information and requiring disclosure and assignment to us of the ideas, developments, discoveries and inventions important to our business.

Our patent portfolio includes patents and patent applications that are licensed to us in whole or in part from a number of partners, including Stanford University and the University of California, and patents and patent applications that are owned by us. Our proprietary technology has been primarily developed by in-house research and development programs, and to a lesser extent through acquisitions, relationships with academic research centers and contract research organizations.

For our product candidates, we will, in general, initially pursue patent protection covering compositions of matter and methods of use. Throughout the development of our product candidates, we seek to identify additional means of obtaining patent protection that would potentially enhance commercial success, including by protecting inventions related to additional methods of use, processes of making, formulation and dosing regimens.

We hold worldwide development and commercialization rights, including through exclusive licenses, to all of our product candidates, which allows us to strategically maximize value from our product portfolio over time. Our patent portfolio includes patent protection for our upstream complement platform and each of our product candidates.

As of January 15, 2022,2023, our patent portfolio, including patents licensed from our partners, comprised 1518 different patent families filed in various jurisdictions worldwide. Our patent portfolio includes issued patents and patent applications in the United States and in other jurisdictions.

One patent family, which we exclusively license from Stanford University, includes nine granted U.S. patents covering various methods of treating neurodegeneration and related medical conditions by inhibiting the C1 complex or its components, such as by using an anti-C1q antibody. The U.S. patents in this family include claims covering uses of ANX005, ANX007, ANX009 and ANX105. These U.S. patents will expire between 2026 and 2030, absent any disclaimers, extensions or adjustments of patent term. There are no pending applications or foreign patents in this family.

Two other patent families, which we own, are directed to anti-C1q antibodies and methods of using them. These families include five granted U.S. patents, two pending U.S. patent applications, 1519 granted foreign patents and 2420 pending foreign patent applications. The U.S. patents in these families cover ANX005, ANX007, ANX009 and ANX105. These patents will expire between 2034 and 2037, absent any disclaimers, extensions or adjustments of patent term.

Another30


Other patent familyfamilies that we own includes include:

one granted U.S. patent, one pending U.S. patent application, onethree granted foreign patent,patents, and 13 pending foreign patent applications. The granted U.S. patent in this family includes claims directed to antibody fragments of anti-C1q antibodies, including ANX007 and ANX009. This patent will expire in 2037, absent any disclaimers, extensions or adjustments of patent term.

Two other patent families that we own include twoterm;

one U.S. patent applications.application and one pending Patent Cooperation Treaty, or PCT, application. The pending U.S. patent applicationsapplication in these families includethis family includes claims directed to anti-C1q antibodies, including ANX105. Patents that may be issued from this family would expire in 2042, absent any disclaimers, extensions or adjustments of patent term.

term;

Another

one pending U.S. patent application. The pending U.S. patent application in this family includes claims covering a pharmaceutical formulation comprising anti-C1q antibodies, including ANX005, ANX007, ANX009 and ANX105. Patents that we own includes may be issued from this family would expire in 2043, absent any disclaimers, extensions or adjustments of patent term;
one pending U.S. patent application, one pending Patent Cooperation Treaty, or PCT application, and threesix pending foreign patent applications. The pending U.S. patent application in this family includes claims covering certain small molecule modulators of the classical pathway, including ANX1502. Patents that may be issued from this family would expire in 2041, absent any disclaimers, extensions or adjustments of patent term; and
one pending PCT application. The pending PCT patent application in this family includes claims covering certain small molecule modulators of the classical pathway. Patents that may be issued from this family would expire in 2043, absent any disclaimers, extensions or adjustments of patent term.

Our patent portfolio also includes eightten patent families, owned by us solely or jointly with the University of California or The J. David Gladstone Institutes or Fondazione Telthon and Universitia degla Studi di Trento, directed to the treatment of certain medical conditions using anti-C1q antibodies, including ANX005, ANX007, ANX009 and ANX105. These families include foursix pending U.S. patent applications, one granted foreign patent, five23 pending foreign patent applications, and four pending PCT applications. Patents that may be issued from these applications would expire between 2034 and 2042,2043, absent any disclaimers, extensions or adjustments of patent term.

Exclusive (Equity) Agreement with The Board of Trustees of the Leland Stanford Junior University

In November 2011, we and The Board of Trustees of the Leland Stanford Junior University, or Stanford, entered into an exclusive licensing agreement, or the Stanford Agreement. Under the Stanford Agreement, Stanford granted to us an exclusive, worldwide, royalty-bearing, sublicensable license, under certain patent rights, or the Licensed Patents, to make, use, offer for sale, sell, import and otherwise commercialize products covered by the Licensed Patents for human or animal diseases, disorders or conditions. We are required to meet certain development and funding diligence milestones for the licensed products.

Under the Stanford Agreement, we are obligated to pay Stanford an upfront payment, license maintenance fees ranging from the single digit to tens of thousands of dollars per year, and milestone payments totaling up to $675,000. We also agreed to make royalty payments at a rate equal to a low single-digit percentage of worldwide net sales of licensed products and a portion of certain sublicensing income we receive from sublicensees at a rate in the low double digit percentages, subject to a specified maximum total payment.

Additionally, in accordance with the terms of the Stanford Agreement, upon closing our first financing event that raised at least $2.0 million, we granted Stanford $150,000 in shares of our redeemable convertible preferred stock. We may also have to pay a fee to Stanford if we assign our rights under the Stanford Agreement to a third party.

We may terminate the Stanford Agreement in its entirety, or as to a particular Licensed Patent or licensed product, for convenience on thirty days’ prior written notice. Stanford may terminate the Stanford Agreement for our breach that remains uncured for forty-five days or if we provide any false report, are delinquent on any report or payment, fail to achieve a milestone or fail to diligently develop and commercialize a licensed product.

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Patent Term and Term Extensions

The terms of individual patents are determined based primarily on the filing date of the earliest non-provisional patent application to which a claim of priority is made or the date of patent issuance and the legal term of patents in the countries in which they are obtained. Generally, utility patents issued for applications filed in the United States are granted a term of 20 years from the filing date of the earliest non-provisional patent application to which a claim of priority is made. In addition, in certain instances, the term of a U.S. patent can be extended to recapture a portion of the United States Patent and Trademark Office, or USPTO, delay in issuing the patent as well as a portion of the term effectively lost as a result of the FDA regulatory review period. However, as to the FDA component, the restoration period cannot be longer than five years and the restoration period cannot extend the patent term beyond 14 years from FDA approval for the product covered by that patent. In addition, only one patent applicable to an approved drug may receive the extension, and the extension applies only to coverage for the approved drug, methods for using it and methods of manufacturing it, even if the claims cover other products or product candidates. Where one patent covers multiple products or product candidates, it may only receive an extension for one of the covered products; any extension related to a second product or product candidate must be applied to a different patent. The duration of foreign patents varies in accordance with provisions of applicable local law, but typically is also 20 years from filing date of the earliest non-provisional patent application to which a claim of priority is made, such as a PCT application. All taxes, annuities or maintenance fees for a patent, as required by the USPTO and various foreign jurisdictions, must be timely paid in order for the patent to remain in force during this period of time.


The actual protection afforded by a patent may vary on a product by product basis, from country to country, and can depend upon many factors, including the type of patent, the scope of its coverage, the availability of regulatory-related extensions and the availability of legal remedies in a particular country and the validity and enforceability of the patent.

Our patents and patent applications may be subject to procedural or legal challenges by others. We may be unable to obtain, maintain and protect the intellectual property rights necessary to conduct our business, and we may be subject to claims that we infringe or otherwise violate the intellectual property rights of others, which could materially harm our business. For more information, see the section titled “Risk Factors—Risks Related to Our Intellectual Property.”

Trademarks and Know-How

In connection with the ongoing development and advancement of our products and services in the United States and various international jurisdictions, we seek to create protection for our marks and enhance their value by pursuing trademarks and service marks where available and when appropriate. In addition to patent and trademark protection, we rely upon know-how and continuing technological innovation to develop and maintain our competitive position. We seek to protect our proprietary information, in part, by using confidentiality agreements with our commercial partners, collaborators, employees and consultants, and invention assignment agreements with our employees and consultants. These agreements are designed to protect our proprietary information and, in the case of the invention assignment agreements, to grant us ownership of technologies that are developed by our employees and through relationships with third parties. These agreements may be breached, and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or be independently discovered by competitors. To the extent that our contractors, commercial partners, collaborators, employees and consultants use intellectual property owned by others in their work for us, disputes may arise as to the rights in related or resulting know-how and inventions. For more information, see the section titled “Risk Factors—Risks Related to Our Intellectual Property.”

Sales and MarketingMarketing

We hold worldwide commercialization rights, including through exclusive licenses, to our product candidates. Given our stage of development, we have not yet established a commercial organization or distribution capabilities. Should any of our product candidates be approved for commercialization, we intend to develop a plan to commercialize them in the United States and other key markets, through internal infrastructure and/or external partnerships in a manner that will enable us to realize the full commercial value of our programs.

Manufacturing32


Our 

Manufacturing

Our successasacompanywilldependonourabilitytodeliverreliable,high-qualitypreclinicalandclinical drugsupply.Wedonotcurrentlyownoroperatefacilitiesforproductmanufacturing,storageanddistribution,or testing.Wecontractwiththirdpartiesforthemanufactureofour productcandidates.Because werelyon contract manufacturers,weemploypersonnelwithextensivetechnical,manufacturing,analyticalandqualityexperience. Ourstaffhasstrongprojectmanagementdisciplinetooverseecontractmanufacturingandtestingactivities,and to compilemanufacturingand qualityinformationfor our regulatory submissions.submissions.

Manufacturingissubjecttoextensiveregulationthatimposesvariousproceduralanddocumentation requirementsandthatgovernsrecordkeeping,manufacturingprocessesandcontrols,personnel,qualitycontrol andqualityassurance,andmore.Oursystemsandourcontractorsarerequiredtobeincompliancewiththese regulations,andcomplianceisassessedregularlythroughmonitoringofperformanceandaformalaudit program.

Ourcurrentsupplychainsforourleaddrugcandidatesinvolveseveralmanufacturersthatspecializein specificoperationsofthemanufacturingprocess,specifically,rawmaterialsmanufacturing,drugsubstance manufacturinganddrugproductmanufacturing.Wecurrentlyoperateunderworkorderprogramsforourdrug candidateswithmasterservicesagreementsinplacethatincludespecificsupplytimelines,volumeandquality specifications.Weintendtoestablishlong-termsupplyagreementsinthefuture.Webelieveourcurrent manufacturershave the scale,the system, and the experienceto supply our currentlyplanned clinical trials.trials.


Wedonotcurrentlyrequirecommercialmanufacturingcapabilities.Shouldourneedschange,wewillneed toscaleupourmanufacturingprocessestoenablecommerciallaunch.Toensurecontinuityinoursupplychain, weplantoestablishsupplyarrangementswithalternativelargerscalesuppliersforcertainportionsofoursupply chain, as appropriate.

Competition

The pharmaceutical, biopharmaceutical and biotechnology industries are characterized by rapidly advancing technologies, intense competition and a strong emphasis on proprietary products. While we believe that our technology, the expertise of our executive and scientific team, research, clinical capabilities, development experience and scientific knowledge provide us with competitive advantages, we face potential competition from many different sources, including pharmaceutical, biopharmaceutical and biotechnology companies, academic institutions, governmental agencies and public and private research institutions. Product candidates that we successfully develop and commercialize may compete with existing therapies and new therapies that may become available in the future.

Our competitors may have significantly greater financial resources, established presence in the market, expertise in research and development, manufacturing, preclinical and clinical testing, and experience in obtaining regulatory approvals and reimbursement and marketing approved products than we do. These competitors also compete with us in recruiting and retaining qualified scientific, sales, marketing and management personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies.

Guillain-Barré SyndromeSyndrome

TherearecurrentlynoapprovedtherapiesforGBSintheUnitedStates.IVIgandplasmaexchangearethe currentstandardsofcareintheWesternworldandpartsofAsia and two products are in development.HansaBiopharmaAB is conductinganopenlabel Phase 2 trialof imlifidase in GBSpatients in Europe and AstraZeneca/Alexion is conducting a Phase 3 study of SOLIRIS in GBS in Japan.

Autoimmune HemolyticAnemias

There are currently no approved therapies for wAIHAGBS in the United StatesStates. IVIg and threeplasma exchange are the current standards of care in the Western world and parts of Asia. Currently, two investigational products are in developmentdevelopment. Hansa Biopharma AB is conducting an open label Phase 2 trial of imlifidase in Phase 3 trials. Rigel is runningGBS patients in Europe and the United Kingdom. AstraZeneca/Alexion completed a Phase 3 clinical trial of TavalisseSOLIRIS (eculizumab) in wAIHA. Incyte initiatedJapan that did not meet its primary endpoint.

Cold Agglutinin Disease, a Phase 3 wAIHA trial with parsaclisib, an oral PI3K delta inhibitor in January 2022. In addition, Janssen is conducting a Phase 2/3 trialtype of nipocalimab, an anti-neonatal Fc receptor antibody for wAIHA.autoimmune hemolytic anemia

Sanofi’s sutimlimab iswas approved by the FDA for CAD in February 2022.. Other companies that haveThere are currently three investigational agents in clinical trials ongoing or planned in these rare anemias include Sanofi’s rilzabrutinib for wAIHA, Immunovant’s IMVT-1401 for wAIHA,CAD. Novartis’s iptacopan, for CADan oral Factor B inhibitor, is currently in Phase 2 and Sanofi’s BIVV020 for CAD

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2. Apellis’s pegcetacoplan is in Phase 1.3, being conducted by Apellis’s European partner, Swedish Orphan Biovitrum (Sobi). Sanofi is testing BIVV020 in a Phase 1 trial.

Lupus Nephritis

There are currently two approved medicines specifically for LN: GSK’s Benlysta and Aurinia’s Lupkynis. There are three productsfour agents in development targeting the complement pathway, all in Phase 2 development: AstraZeneca’s ravulizumab, a C5 inhibitor, and also ALXN2050, an oral Factor D inhibitor, as well as Omeros’sinhibitor. Omeros is developing narsoplimab, a MASP-2-targeting monoclonal antibody.antibody, and Novartis is developing iptacopan, an oral factor B inhibitor. Outside of the complement pathway, there are four productscurrently five agents in Phase 3 development:development for adults with lupus: Roche’s Obinutuzumab,obinutuzumab, Novartis’s secukinumab and ianalumab, AstraZeneca’s anifrolumab and AstraZeneca’s anifrolumab.Vera Therapeutics’s ataticept. Additionally, Aurinia Pharmaceuticals is planning to start a trial of voclosporin in adolescents with lupus nephritis.

Huntington’s DiseaseDisease

There are no approved disease-modifying therapies for HD. Multiple companies are developing potentially disease-modifying therapies, including Prilenia’s Pridopidine in Phase 3, PTC Therapeutics’s PTC518 in Phase 2, Sage Therapeutics’s SAGE-718 in Phase 2, and uniQure’s gene therapy candidate, AMT-130 in Phase 1. Additional1/2. Roche recently initiated a Phase 2 study of tominersen in prodromal or early manifest HD patients aged 25-50. Additional early-stage products in development are AskBio’s BV-101 candidate gene therapy in Phase1/2, and Wave Life Sciences’s WVE-003 in Phase and Novartis’s branaplam in Phase 1/2.


AmyotrophicLateralSclerosis

The drugs riluzole and Radicava (edaravone) are currently approved for the treatment of ALS and have shown modest effects in slowing the progression of the disease. AmylyxAmylyx’s Albrioza (AMX0035) was approved by the FDA in September 2022 and has completedshown a Phase 3 trial and submitted AMX0035 for approval to the FDA.survival benefit among patients with ALS. Zilucoplan, a C5a inhibitor from UCB, is in a Phase 2/3 study as a part of the HEALYHEALEY ALS platform trial. Apellis has also initiated a Phase 2 study with APL-2, their C3-inhibitor. Another nine investigational agents are currently in Phase 3 development. There are a significant number of companies conducting clinical trials in ALS patients, including Ionis, NurOwn, Biohaven, Prilenia, Cytokinetics and others.

Geographic Atrophy

NoOne FDA-approved treatment is currently available for GA. We are aware of a number of companies developing products for the treatment of GA. Those products in clinical development targeting the complement cascade include:GA, Apellis’s APL-2,Syfovre, a C3 inhibitor, which has completed a Phase 3 trial;was also filed in the European Union in December 2022. Iveric Bio’s zimura,avacincaptad pegol, a C5 inhibitor, was filed by the FDA with a Prescription Drug User Fee Act goal date of October 2023. Other complement cascade-targeted agents in a Phase 3 trial; NGM Pharma’s NGM621, a C3 inhibitor in a Phase 2 trial;development are Ionis’s IONIS-FB-LR, an antisense molecule inhibitor of Complement Factor B in a Phase 2 trial; AstraZeneca’s danicopan, an oral, complement factor D inhibitor in a Phase 2 trial. A Phase I trial and Gemini Therapeutics’s GEM103, a recombinant complement factor H in a Phase 2 trial.of JNJ 1887, Janssen’s investigational gene therapy expressing soluble CD59, has recently been completed with positive results. Complement-directed therapies in clinical development for genetically selected patient populations include GT005, a Factor I gene therapy in Phase 2 development by Gyroscope and GEM103, a Factor H replacement therapy in a Phase 2 trial being developed(recently acquired by Gemini Therapeutics.Novartis). Other products that do not target the complement cascade currently in Phase 2 or 3 clinical trials are being developed by Roche, Stealth BioTherapeutics,Alkeus, Allegro, Alkeus Pharmaceuticals and Regenerative Patch Technologies. ONL Therapeutics and Astellas each have an asset in Phase 1 of development.

GovernmentMultifocal Motor Neuropathy

Currently, Gammagard Liquid (10% Immune Globulin Infusion (Human)) is the only therapy approved by the FDA for MMN. There are few agents in development for MMN. Argenx’s ARGX-117, an IV-delivered C2 inhibitor is in Phase 2. Takeda is conducting a Japan-based Phase 3 trial of TAK-771, a 10% Immune Globulin and Recombinant Human Hyaluronidase (rHuPH20) delivered as a subcutaneous infusion.

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 Regulation

Government Regulation

TheFDAandotherregulatoryauthoritiesatfederal,stateandlocallevels,aswellasinforeigncountries, extensivelyregulate,amongotherthings,theresearch,development,testing,manufacture,qualitycontrol, import,export,safety,effectiveness,labeling,packaging,storage,distribution,recordkeeping,approval, advertising,promotion,marketing,post-approvalmonitoringandpost-approvalreportingofproduct candidatessuchasthosewearedeveloping. A new drug must be approved by the FDA through the new drug application, or NDA,ND, process and a new biologic must be approved by the FDA through the biologics license application, or BLA, process before it may be legally marketed in the U.S.United States. We, along with third-party contractors, will be required to navigate the various preclinical, clinical and commercial approval requirements of the governing regulatory agencies of the countries in which we wish to conduct studies or seek approval or licensure of our productcandidates.The processofobtainingregulatoryapprovalsandthesubsequentcompliancewithapplicablefederal,state,localand foreignstatutesand regulationsrequirethe expenditureof substantialtimeand financial resources.resources.

U.S. Biologics Regulation

In the U.S.,United States, the FDA regulates drugs under the federal Food, Drug, and Cosmetic Act, or FDCA, and in the case of biologics, also under the Public Health Service Act, or PHSA, and their implementing regulations. The processrequiredbytheFDAbefore a drug orbiologicmaybemarketedintheUnitedStatesgenerally involvesthe following:

completion of preclinical laboratory tests and animal studies performed in accordance with the FDA’s Good Laboratory Practice requirements, or GLP requirements and other applicable regulations;
submission to the FDA of an Investigational New Drug application, or IND, which must become effective before clinical trials may begin;
approval by an institutional review board, or IRB, or ethics committee, or EC, at each clinical site before the trial is commenced at such site;
performance of adequate and well-controlled human clinical trials in accordance with Good Clinical Practice, or GCP, requirements to establish the safety and efficacy of the proposed drug, or the safety, purity and potency of the proposed biologic for its intended purpose;
preparation of and submission to the FDA of an NDA or BLA after completion of all required clinical trials;
satisfactory completion of an FDA Advisory Committee review, if applicable;
a determination by the FDA within 60 days of its receipt of an NDA or BLA whether to file the application for review;
satisfactory completion of an FDA pre-approval inspection of the manufacturing facility or facilities at which the proposed drug or biologic is produced to assess compliance with current Good Manufacturing Practices, or cGMPs, and to assure that the facilities, methods and controls are adequate to preserve the product’s continued safety, purity and potency, and of selected clinical investigation sites to assess compliance with GCP; and
FDA review and approval of the BLA or NDA to permit commercial marketing of the product for specific indication(s) for use in the United States.

completionofpreclinicallaboratorytestsandanimalstudiesperformedinaccordancewiththeFDA’s GoodLaboratoryPracticerequirements,or GLP requirements and other applicable regulations;

submissionto the FDA of an Investigational New Drug application, or IND, which must become effective before clinical trials may begin;

approvalbyan institutional review board, or IRB, or ethics committee, or EC, at each clinical site before the trial is commenced at such site;

performanceofadequateandwell-controlledhumanclinicaltrials in accordance with Good Clinical Practice, or GCP, requirements to establish the safety and efficacy of the proposed drug, or the safety, purity and potency of the proposed biologic for its intended purpose;

preparationofandsubmissiontotheFDAofan NDA orBLAaftercompletion of allrequiredclinicaltrials;


satisfactorycompletionof an FDAAdvisory Committeereview, if applicable;

a determination by the FDA within 60 days of its receipt of an NDA or BLA whether to file the application for review;

satisfactory completion of an FDA pre-approval inspection of the manufacturing facility or facilities at which the proposed drug or biologic is produced to assess compliance with current Good Manufacturing Practices, or cGMPs, and to assure that the facilities, methods and controls are adequate to preserve the product’s continued safety, purity and potency, and of selected clinical investigation sites to assess compliance with GCP; and

FDA review and approval of the BLA or NDA to permit commercial marketing of the product for specific indication(s) for use in the United States.

Preclinical studies include laboratory evaluation of product chemistry, toxicity and formulation, as well as animal studies to assess potential safety and efficacy. Prior to beginning the first clinical trial with a product candidate in the United States, a sponsor must submit an IND to the FDA, which isarequestforauthorizationfromtheFDAtoadministeraninvestigationalnewdrug producttohumans.ThecentralfocusofanINDsubmissionisonthegeneralinvestigationalplanandthe protocol(s)for the proposed clinicaltrial(s).TheINDalsoincludesresultsofanimaland invitro studiesassessingthetoxicology,pharmacokinetics,pharmacologyandpharmacodynamiccharacteristicsoftheproduct;chemistry, manufacturingandcontrolsinformation;andanyavailablehumandataorliteraturetosupporttheuseofthe investigationalproduct.An IND mustbecome effectivebeforehuman clinicaltrialsmay begin. The IND automatically goes into effect 30daysafterreceiptbytheFDA,unlesstheFDA,withinthe30-daytime period,

raises35


 

raises safetyconcernsorquestionsabouttheproposedclinicaltrial.Insuchacase,theINDmaybe placedonclinicalholdandtheINDsponsorandtheFDAmustresolveanyoutstandingconcernsorquestions beforetheclinicaltrialcanbegin.SubmissionofanIND thereforemayormaynotresultinFDA authorizationto begin a clinicaltrial.

Clinicaltrialsinvolvetheadministrationoftheinvestigationalproducttohumansubjectsunderthe supervisionofqualifiedinvestigatorsinaccordance with GCP, which include the requirement that all research subjects provide their informed consent for their participation in any clinical trial. Clinical trials are conducted under protocols detailing, among other things, the objectives of the study, the parameters to be used in monitoring safety and the effectiveness criteria to be evaluated. A separate submission to the existingINDmust bemadeforeachsuccessiveclinicaltrialconductedduringproductdevelopmentandforanysubsequentprotocol amendments. While the IND is active, progress reports summarizing the results of the clinical trials and nonclinical studies performed since the last progress report, among other information, must be submitted at least annually to the FDA, and written IND safety reports must be submitted to the FDA and investigators for serious and unexpected suspected adverse events, findings from other studies suggesting a significant risk to humans exposed to the same or similar drugs, findings from animal or in vitro testing suggesting a significant risk to humans, and any clinically important increased incidence of a serious suspected adverse reaction compared to that listed in the protocol or investigator brochure.

Furthermore,anindependentIRB or ECforeachsiteproposingtoconducttheclinicaltrialmustreview andapprovetheplanforanyclinicaltrialanditsinformedconsentformbeforetheclinicaltrialbeginsatthat site,andmust monitor the trial until completed. Some studies also include oversight by an independent group of qualified experts organized by the clinical trial sponsor, known as a Data Safety Monitoring Board, which provides authorization for whether or not a trial may move forward at designated check points based on access to certain data from the study and may halt the clinical trial if it determines that there is an unacceptable safety risk for subjects or other grounds, such as no demonstration of efficacy. Regulatory authorities, the IRB/ethics committee or the sponsor may suspend a clinical trial at any time on various grounds, including a finding that the subjects are being exposed to an unacceptable health risk or that the trial is unlikely to meet its stated objective(s). There are also requirements governing the reporting of ongoing clinical trials and clinical trial results to public registries.

ForpurposesofBLA or NDA approval,humanclinicaltrialsaretypicallyconductedinthreesequentialphasesthat may overlapor be combined:

Phase 1—The investigational product is initially introduced into healthy human subjects or patients with the target disease or condition. These trials are designed to test the safety, dosage tolerance, absorption, metabolism and distribution of the investigational product in humans, the side effects associated with increasing doses, and, if possible, to gain early evidence on effectiveness.
Phase 2—The investigational product is administered to a limited patient population with a specified disease or condition to evaluate the preliminary efficacy, optimal dosages and dosing schedule and to identify possible adverse side effects and safety risks. Multiple Phase 2 clinical trials may be conducted to obtain information prior to beginning larger and more expensive Phase 3 clinical trials.
Phase 3—The investigational product is administered to an expanded patient population to further evaluate dosage, to provide statistically significant evidence of clinical efficacy and to further test for safety, generally at multiple geographically dispersed clinical trial sites. These clinical trials are intended to establish the overall risk/benefit ratio of the investigational product and to provide an adequate basis for product approval.

Phase 1—The investigational product is initially introduced into healthy human subjects or patients with the target disease or condition. These trials are designed to test the safety, dosage tolerance, absorption,


metabolism and distribution of the investigational product in humans, the side effects associated with increasing doses, and, if possible, to gain early evidence on effectiveness.

Phase 2—The investigational product is administered to a limited patient population with a specified disease or condition to evaluate the preliminary efficacy, optimal dosages and dosing schedule and to identify possible adverse side effects and safety risks. Multiple Phase 2 clinical trials may be conducted to obtain information prior to beginning larger and more expensive Phase 3 clinical trials.

Phase 3—The investigational product is administered to an expanded patient population to further evaluate dosage, to provide statistically significant evidence of clinical efficacy and to further test for safety, generally at multiple geographically dispersed clinical trial sites. These clinical trials are intended to establish the overall risk/benefit ratio of the investigational product and to provide an adequate basis for product approval.

In some cases, the FDA may require, or companies may voluntarily pursue, additional clinical trials after a product is approved to gain more information about the product. These so-called Phase 4 trials may also be made a condition to approval of the BLA or NDA.

Concurrent with clinical trials, companies may complete additional animal studies and develop additional information about the biological characteristics of the product candidate and must finalize a process for manufacturing the product in commercial quantities in accordance with cGMPs. The manufacturing process must be capable of consistently producing quality batches of the product candidate and, among other things, must develop methods for testing the identity, strength, quality and purity of the final product. Additionally, appropriate packaging must be

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selected and tested and stability studies must be conducted to demonstrate that the product candidate does not undergo unacceptable deterioration over its shelf life.

FDA Review and Approval Process

Assumingsuccessfulcompletionofallrequiredtestinginaccordancewithallapplicableregulatory requirements,theresultsofproductdevelopment,nonclinicalstudiesandclinicaltrialsaresubmittedtotheFDA aspartofaBLA or NDArequestingapprovaltomarkettheproduct candidateforoneormoreindications.TheBLA or NDA mustinclude allrelevantdataavailablefrompreclinicalstudiesandclinicaltrials,includingnegativeorambiguousresultsaswellaspositivefindings,togetherwithdetailedinformationrelatingtotheproduct’schemistry,manufacturing, controlsandproposedlabeling,amongotherthings.Datacancomefromcompany-sponsoredclinicaltrials intendedtotestthesafetyandeffectivenessofauseoftheproduct candidateorfromanumberofalternativesources, includingstudiesandtrialsinitiatedbyinvestigators.ThesubmissionofaBLA or NDArequirespaymentofasubstantial userfeetotheFDA,andthesponsorofanapprovedBLA or NDAisalsosubjecttoanannualprogramfee.Awaiverof userfeesmaybeobtainedundercertainlimitedcircumstances.Additionally,nouserfeesareassessedonBLAs or NDAs for productsdesignatedas Orphan Drugs, unlessthe applicationalso seeksa non-orphan-designated indication.indication.

Within 60 days following submission of the application, the FDA reviews a BLA or NDA submitted to determine if it is substantially complete before the FDA accepts it for filing. The FDA may refuse to file any BLA or NDA that it deems incomplete or not properly reviewable at the time of submission and may request additional information. In this event, the Sponsor may meet with the FDA to confirm the additional information required to resubmit the BLA or NDA. Once a BLA or NDA must be resubmitted with the additional information. OnceaBLA or NDAhasbeen accepted for filing,,theFDA’sgoalistoreviewstandardapplicationswithintenmonthsafter itacceptstheapplicationforfiling,or,iftheapplicationqualifiesforpriorityreview,sixmonthsafterthefiling date.Priorityreviewdesignationwilldirectoverallattentionandresourcestothe evaluationofapplicationsforproductsthat,ifapproved,would representsignificantimprovementsinthesafetyor effectivenessofthetreatment,diagnosisorpreventionofseriousconditions.Inbothstandardandpriority reviews, thereviewprocess isoften significantlyextendedbyFDArequestsforadditional information or clarification. The FDA reviews an NDA to determine, among other things, whether a product is safe and effective for its intended use and whether its manufacturing is cGMP‑compliant to assure and preserve the product’s identity, strength, quality and purity. TheFDAreviewsaBLAtodetermine,amongotherthings,whetheraproductissafe,pureand potentandthefacilitiesinwhichitismanufactured,processed,packedorheldmeetstandardsdesignedtoassure theproduct’scontinuedsafety,purityandpotency.TheFDAmayalsoconvenea public AdvisoryCommitteeto provide additional expert


insightonapplicationreviewquestions.TheFDAisnotboundbyrecommendationsofan Advisory Committee, but it considerssuch recommendationswhenmakingdecisionsregardingapproval.

BeforeapprovingaBLA or NDA,theFDAwilltypicallyinspectthefacilityorfacilitieswheretheproduct candidateis manufactured.TheFDAwillnotapproveanapplicationunlessitdeterminesthatthemanufacturingprocesses andfacilitiesareincompliancewith cGMP requirementsandadequatetoassureconsistentproductionoftheproduct candidatewithinrequired specifications.Additionally,beforeapprovingaBLA or NDA,theFDAwilltypicallyinspectoneormoreclinicalsites and/or the sponsor’s offices to assure compliance with GCP.thesponsor’sofficestoassurecompliancewithGCP.

AftertheFDAevaluatesaBLA or NDAandconductsinspectionsofclinicaltrialsitesandmanufacturingfacilities wheretheinvestigationalproductand/oritsdrugsubstancewillbeproduced,theFDAmayissueanApproval LetteroraCompleteResponseLetter.An Approval Approval Letterauthorizescommercialmarketingoftheproductwith specificprescribinginformationforspecificindications.ACompleteResponseLetterindicatesthattheBLA or NDAis notreadyforapprovalinitspresentformandendsthecurrentreviewcycle, andwilldescribeallofthe deficienciesthattheFDAhasidentifiedintheBLA or NDA. The The FDAmayissuetheCompleteResponseLetterwithout firstconductingrequiredinspections,testingsubmittedproductlots,and/orreviewingproposedlabeling.In issuingtheCompleteResponseLetter,theFDAmayrecommendactionsthattheapplicantmighttaketoplace theBLA or NDAinconditionforapproval,includingrequestsforadditionalinformationorclarification.TheFDAmay delayorrefuseapprovalofaBLA or NDAifapplicableregulatorycriteriaarenotsatisfied,requireadditionaltestingor informationand/orrequirepost-marketingtestingand surveillanceto monitorsafetyor efficacyof a product.

Ifregulatoryapprovalofaproductisgranted,suchapprovalwillbegrantedforparticularindicationsand mayentaillimitationsontheindicatedusesforwhichsuchproductmay be marketed. Additionally, the FDA may approve

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 Additionally,

the FDAmay approveaBLA or NDAwithaRiskEvaluationandMitigationStrategy,orREMS,toensurethebenefitsoftheproduct outweighitsrisks.AREMSisasafetystrategy to manage a known or potential serious risk associated with a medicine and to enable patients to have continued access to such medicines by managing their safe use, and could include medication guides, physician communication plans, or elements to assure safe use, such as restricted distribution methods, patient registries, and other risk minimization tools. The FDA also may condition approval on, among other things, changes to proposed labeling or the development of adequate controls and specifications. Once approved, the FDA may withdraw the product approval if compliance with pre- and post- marketing requirements is not maintained or if problems occur after the product reaches the marketplace. The FDA may also require one or more Phase 4 post-marketing studies and surveillance to further assess and monitor the product’s safety and effectiveness after commercialization, and may limit further marketing of the product based on the results of these post-marketing studies.

Expedited DevelopmentandReview Programs

A sponsor may seek approval of its product candidate under programs designed to accelerate FDA’s review and approval of product candidates that meet certain criteria. Specifically, drugs and biologics s are eligible for Fast Track designation if they are intended to treat a serious or life-threatening disease or condition and demonstrate the potential to address unmet medical needs for the disease or condition. For a Fast Track product candidate, the FDA may consider sections of the BLA or NDA for review on a rolling basis before the complete application is submitted, if the sponsor provides a schedule for the submission of the sections of the application, the FDA agrees to accept sections of the application and determines that the schedule is acceptable and the sponsor pays any required user fees upon submission of the first section of the application. A BLA or NDA for a Fast Track-designated product candidate may also qualify for priority review, under which the FDA sets the target date for FDA action on the BLA or NDA at six months after the FDA accepts the application for filing. Priority review is granted when there is evidence that the product candidate, if approved, would provide a significant improvement in the safety or effectiveness of the treatment, diagnosis, or prevention of a serious disease or condition. If criteria are not met for priority review, the application is subject to the standard FDA review period of 10 months after FDA accepts the application for filing.

A product candidate intended to treat a serious or life-threatening disease or condition may also be eligible for Breakthrough Therapy designation to expedite its development and review. A product candidate can receive Breakthrough Therapy designation if preliminary clinical evidence indicates that the product candidate, alone or in


combination with one or more other drugs or biologics, may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. The designation includes all of the Fast Track program features, as well as more intensive FDA interaction and guidance beginning as early as Phase 1 and an organizational commitment to expedite the development and review of the product candidate, including involvement of senior managers.reviewers at FDA.

In addition, a product candidate may be eligible for accelerated approval. Drugs and biologics intended to treat serious or life threatening diseases or conditions may be eligible for accelerated approval upon a determination that the drug or biologic has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit or a clinical endpoint that can be measured earlier than irreversible morbidity or mortality that is reasonably likely to predict an effect on irreversible morbidity or mortality or other clinical benefit, taking into account the severity, rarity or prevalence of the condition and the availability or lack of alternative treatments. Post-marketing studies or completionAs a condition of ongoing studies after marketing approval, arethe FDA generally requires sponsors of products receiving accelerated approval to conduct well-controlled confirmatory required to verify or characterize the drug or biologic’s clinical benefit in relationship to the surrogate endpoint or ultimate outcome in relationship to thepredicted clinical benefit. In addition, the FDA currently requires as a condition for accelerated approval pre-approval of promotional materials, which could adversely impact the timing of the commercial launch of the product. The FDA may withdraw approval of a product or indication approved under accelerated approval if, for example, the sponsor fails to conduct any required post-marketingconfirmatory studies in a timely manner, or if such studies fail to verify the predicted clinical benefit of the product.

Fast Track designation, priority review, accelerated approval and Breakthrough Therapy designation do not change the standards for approval but may expedite the development or approval process. Even if a product qualifies for one or more of these programs,theFDAmaylaterdecidethattheproductnolongermeetsthe conditionsfor qualificationor decidethatthe timeperiodfor FDAreview or approvalwill not be shortened.

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Orphan DrugDesignation and ExclusivityExclusivity

Under the Orphan Drug Act, the FDA may grant Orphan designation to a drug or biologic intended to treat a rare disease or condition, defined as a disease or condition with a patient population of fewer than 200,000 individuals in the United States, or a patient population greater than 200,000 individuals in the United States and when there is no reasonable expectation that the cost of developing and making available the biologic in the United States will be recovered from sales in the United States for that drug or biologic. Orphan Drug designation must be requested before submitting a BLA or NDA. After the FDA grants Orphan Drug designation, the generic identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Orphan designation does not convey any advantage in or shorten the duration of the regulatory review and approval processrequirements or process.

If a product candidate that has Orphan Drug designation subsequently receives the first FDA approval for the disease or condition for which it has such designation, the product is entitled to orphan product exclusivity, which means that the FDA may not approve any other applications, including a full BLA or NDA, to market the same biologic or chemical entity for the same disease or condition for seven years, except in limited circumstances, such as a showing of clinical superiority to the product with Orphan Drug exclusivity or if the FDA finds that the holder of the Orphan Drug exclusivity has not shown that it can assure the availability of sufficient quantities of the Orphan Drug to meet the needs of patients with the disease or condition for which the drug was designated. Orphan Drug exclusivity does not prevent the FDA from approving a different drug or biologic for the same disease or condition, or the same drug or biologic for a different disease or condition. Among the other benefits of Orphan Drug designation are tax credits for certain research and development activities and a waiver of the BLA or NDA application user fee.

A designated Orphan DrugmaynotreceiveOrphanDrugexclusivityifitisapprovedforausethatis broader thantheindication forwhichitreceivedOrphandesignation.Inaddition,OrphanDrugexclusive marketingrightsintheUnitedStatesmaybelostiftheFDAlaterdeterminesthattherequestfordesignationwas materiallydefectiveor,asnotedabove,ifthesecondapplicantdemonstratesthatitsproductisclinicallysuperior totheapprovedproductwithOrphanexclusivityorthemanufactureroftheapprovedproductisunabletoassure sufficientquantitiesof the productto meetthe needs of patientswith the rarediseaseor condition.


Post-Approval Requirements

Anydrugs or biologicsmanufacturedor distributed pursuant to FDA approvals are subject to pervasive and continuing regulation by the FDA, including, among other things, requirements relating to record-keeping, reporting of adverse experiences, periodic reporting, productsamplinganddistribution,andadvertisingand promotionoftheproduct.Afterapproval,mostchangestotheapprovedproduct,suchasaddingnewindications orotherlabelingclaims,aresubjecttopriorFDAreviewandapproval.Therealsoarecontinuing,annual programfeesforanymarketedproducts. Drug and biologicmanufacturersandtheirsubcontractorsarerequiredtoregister theirestablishmentswiththeFDAandcertainstateagencies,andaresubjecttoperiodicunannounced inspectionsbytheFDAandcertainstateagenciesforcompliancewithcGMPs,whichimposecertainprocedural anddocumentationrequirementsuponusandourthird-partymanufacturers.Changestothemanufacturing processarestrictlyregulated,and,dependingonthesignificanceofthechange,mayrequirepriorFDAapproval beforebeingimplemented.FDAregulationsalsorequireinvestigationandcorrectionofanydeviationsfrom cGMPsandimposereportingrequirementsuponusandanythird-partymanufacturersthatwemaydecidetouse. Accordingly,manufacturersmustcontinuetoexpend time,money and effortin the areaof productionand quality controlto maintaincompliancewith cGMPs and other aspects of regulatory compliance.

The FDA may withdraw approval if compliance with regulatory requirements and standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency, or with manufacturing processes, or failure to comply with regulatory requirements, may result in revisions to the approved labeling to add new safety information; imposition of post-market studies or clinical studies to assess new safety risks; or imposition of distribution restrictions or other restrictions under a REMS program. Other potential consequences include, among other things:

restrictions on the marketing or manufacturing of the product, complete withdrawal of the product from the market, or product recalls;

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 aspects

fines, Warning Letters, or untitled enforcement letters;
clinical holds on clinical studies;
refusal of regulatorycompliance.

Thethe FDAmaywithdrawapprovalifcompliancewithregulatoryrequirementsandstandardsisnot maintainedorifproblemsoccuraftertheproductreachesthemarket.Laterdiscoveryofpreviouslyunknown problemswithaproduct,includingadverseeventsofunanticipatedseverityorfrequency,orwithmanufacturing processes,orfailuretocomplywithregulatoryrequirements,mayresultinrevisionstotheapprovedlabelingto addnewsafetyinformation;impositionofpost-marketstudiesorclinicalstudiestoassessnewsafetyrisks;approve pending applications or supplements to approved applications, or suspension or revocation of product approvals;

product seizure or detention, or refusal to permit the import or export of products;
consent decrees, corporate integrity agreements, debarment or exclusion from federal healthcare programs;
mandated modification of promotional materials and labeling and the issuance of corrective information;
the issuance of safety alerts, Dear Healthcare Provider letters, press releases and other communications containing warnings or other safety information about the product; or
injunctions or the impositionofdistributionrestrictions civil orotherrestrictionsunderaREMSprogram.Otherpotentialconsequences include,among otherthings:

criminal penalties.

restrictionsonthemarketingormanufacturingoftheproduct,completewithdrawalof the productfrom the market, or productrecalls;

fines,Warning Letters,or untitled enforcementletters;

clinicalholds on clinicalstudies;

refusal oftheFDAtoapprovependingapplications orsupplements toapprovedapplications, or suspensionor revocationof productapprovals;

productseizureor detention,or refusalto permitthe importor exportof products;

consent decrees, corporate integrity agreements, debarment or exclusion from federal healthcare programs;

mandated modification of promotional materials and labeling and the issuance of corrective information;

theissuanceofsafetyalerts,DearHealthcareProviderletters,pressreleasesandothercommunications containingwarnings or othersafetyinformationabout the product;or

injunctionsor the impositionof civilor criminalpenalties.

The FDA closely regulates the marketing, labeling, advertising and promotion of drugs and biologics. A company can make only those claims relating to safety and efficacy, purity and potency that are approved by the FDA and in accordance with the provisions of the approved label. The FDA and other agencies actively enforce the laws and regulationsprohibitingthepromotionofso-called “off-label” uses. Failure to comply with these requirements can result in, among other things, adverse publicity, Warning Letters, Letters, correctiveadvertisingandpotentialcivilandcriminal penalties.Physiciansmayprescribelegallyavailableproductsforusesthatarenotdescribedintheproduct’s labelingandthatdifferfromthosetestedbyusandapprovedbytheFDA. Suchoff-labelusesarecommonacross medicalspecialties.Physiciansmaybelievethatsuch off-label usesarethebesttreatmentformanypatientsin variedcircumstances.TheFDAdoesnotregulatethebehaviorofphysiciansintheirchoiceoftreatments.The FDA does not regulate the behavior of physicians in their choice of treatments. The FDA does, however, restrictmanufacturer’scommunicationson the subjectof off-labeluse of their products.products.


BiosimilarsandExclusivity

The Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, or collectively the ACA, signed into law in 2010, includes a subtitle called the BPCIA, which created an abbreviated approval pathway for biological products that are biosimilar to, or interchangeable with, an FDA-licensed reference biological product. The FDA has issued several guidance documents outlining an approach to review and approval of biosimilars. Biosimilarity, which requires that there be no clinically meaningful differences between the biological product and the reference product in terms of safety, purity and potency, can be shown through analytical studies, animal studies and a clinical study or studies. Interchangeability requires that a product is biosimilar to the reference product and the product must demonstrate that it can be expected to produce the same clinical results as the reference product in any given patient and, for products that are administered multiple times to an individual, the biologic and the reference biologic may be alternated or switched after one has been previously administered without increasing safety risks or risks of diminished efficacy relative to exclusive use of the reference biologic.

Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years following the date that the reference product was first licensed by the FDA. In addition, the approval of a biosimilar product may not be made effective by the FDA until 12 years from the date on which the reference product was first licensed. During this 12-year period of exclusivity, another company may still market a competing version of the reference product if the FDA approves a full BLA for the competing product containing that applicant’s own preclinical data and data from adequate and well-controlled clinical trials to demonstrate the safety, purity and potency of its product. The BPCIA also created certain exclusivity periods for biosimilars approved as interchangeable products. At this juncture, it is unclear whether products deemed “interchangeable” by the FDA will, in fact, be readily substituted by pharmacies, which are governed by state pharmacy law.

A biological product can also obtain pediatric market exclusivity in the United States. Pediatric exclusivity, if granted, adds six months to existing exclusivity periods and patent terms. This six-month exclusivity, which runs from the end of other exclusivity protection or patent term, may be granted based on the voluntary completion of a pediatric study in accordance with an FDA-issued “Written Request” for such a study.

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Drug Product Marketing Exclusivity

Market exclusivity provisions authorized under the FDCA can delay the submission or the approval of certain marketing applications. For example, the FDCA provides a five-year period of non-patent data exclusivity within the U.S.United States to the first applicant to obtain approval of an NDA for a new chemical entity. A drug is a new chemical entity if the FDA has not previously approved any other new drug containing the same active moiety, which is the molecule or ion responsible for the action of the drug substance. During the exclusivity period, the FDA may not approve or even accept for review an abbreviated new drug application, or ANDA, or an NDA submitted under Section 505(b)(2), or 505(b)(2) NDA, submitted by another company for another drug based on the same active moiety, regardless of whether the drug is intended for the same indication as the original innovative drug or for another indication, where the applicant does not own or have a legal right of reference to all the data required for approval. However, an application may be submitted after four years if it contains a certification of patent invalidity or non-infringement to one of the patents listed with the FDA by the innovator NDA holder.

The FDCA alternatively provides three years of marketing exclusivity for an NDA, or supplement to an existing NDA if new clinical investigations, other than bioavailability studies, that were conducted or sponsored by the applicant are deemed by the FDA to be essential to the approval of the application, for example new indications, dosages or strengths of an existing drug. This three-year exclusivity covers only the modification for which the drug received approval on the basis of the new clinical investigations and does not prohibit the FDA from approving ANDAs or 505(b)(2) NDAs for drugs containing the active agent for the original indication or condition of use. Five-year and three-year exclusivity will not delay the submission or approval of a full NDA. However, an applicant submitting a full NDA would be required to conduct or obtain a right of reference to any preclinical studies and adequate and well-controlled clinical trials necessary to demonstrate safety and effectiveness.

Pediatric exclusivity is another type of marketing exclusivity available in the U.S.United States. Pediatric exclusivity provides for an additional six months of marketing exclusivity attached to another period of exclusivity if a sponsor conducts clinical trials in children in response to a written request from the FDA. The issuance of a written request does not


require the sponsor to undertake the described clinical trials. In addition, orphan drug exclusivity, as described above, may offer a seven-year period of marketing exclusivity, except in certain circumstances.

Other Healthcare Laws and Compliance Requirements

Pharmaceutical companies are subject to additional healthcare regulation and enforcement by the federal government and by authorities in the states and foreign jurisdictions in which they conduct their business. Such laws include, without limitation, U.S. federal and state fraud and abuse laws, including false claims, civil monetarypenalties, consumerprotection and transparency laws regarding drug pricing and payments or other transfers of value made to physicians and other licensed healthcare professionals, as well as similar foreign laws in the jurisdictions outside the United States. Violation of any of such laws or any other governmental regulations that apply may result in penalties, including, without limitation, significant administrative, civil and criminal penalties, damages, fines, disgorgement, additional reporting obligations, contractual damages, the curtailment or restructuring of operations, exclusion from participation in governmental healthcare programs and imprisonment.

Data Privacy and Security Laws

Numerous state, federal and foreign laws, regulations, and standards govern the collection, use, access to, confidentiality and security of health-related and other personal information, including clinical trial data, and could apply now or in the future to our operations or the operations of our partners. In the United States, numerous federal and state laws and regulations, including data breach notification laws, health information privacy and security laws and consumer protection laws and regulations govern the collection, use, disclosure, and protection of health-related and other personal information. In addition, certain foreign laws govern the privacy and security of personal data, including health-related data. For example, the General Data Protection Regulation, or the GDPR, imposes strict requirements for processing the personal data of individuals within the European Economic Area, or the EEA. Companies that must comply with the GDPR face increased compliance obligations and risk, including more robust regulatory enforcement of data protection requirements and potential fines for noncompliance of up to €20 million or 4% of the annual global revenues of the noncompliant company, whichever is greater. Further, from January 1, 2021, companies have had to comply with the GDPR and also the UK GDPR, which, together with the amended UK Data

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Protection Act 2018, retains the GDPR in UK national law. The UK GDPR mirrors the fines under the GDPR, i.e., fines up to the greater of €20 million (£17.5 million) or 4% of global turnover. Privacy and security laws, regulations, and other obligations are constantly evolving, may conflict with each other to complicate compliance efforts, and can result in investigations, proceedings, or actions that lead to significant civil and/or criminal penalties and restrictions on data processing.

Coverage and Reimbursement

Salesofanypharmaceuticalproductdepend,inpart,ontheextenttowhichsuchproductwillbecoveredby third-partypayors,suchasfederal,stateandforeigngovernmenthealthcareprograms,commercialinsuranceand managedhealthcareorganizations,andthelevelofreimbursementforsuchproductbythird-partypayors.No uniformpolicyexistsforcoverageandreimbursementforproductsexistsamongU.S.third-partypayors. Therefore,decisionsregardingtheextentofcoverageand amountof reimbursementto be providedare made on a plan-by-planbasis.Theprocessfordeterminingwhetherathird-partypayorwillprovidecoverageforaproduct typicallyisseparatefromtheprocessforsettingthepriceofsuchproductorforestablishingthereimbursement ratethatthepayorwillpayfortheproductoncecoverageisapproved.Third-partypayorsmaylimitcoverageto specificproductsonanapprovedlist,alsoknownasaformulary,whichmightnotincludeallofthe FDA-approvedproductsforaparticularindication,orplaceproductsatcertainformularylevelsthatresultin lowerreimbursementlevelsandhighercost-sharingobligationimposedonpatients.Onethird-partypayor’s decisiontocoveraparticularmedicalproductorservicedoesnotensurethatotherpayorswillalsoprovide coverageforthemedicalproductorservice.Asaresult,thecoveragedeterminationprocesswilloftenrequireus toprovidescientificandclinicalsupportfortheuseofourproductcandidatestoeachpayorseparatelyandcan beatime-consumingprocess,withnoassurancethatcoverageandadequatereimbursementwillbeapplied consistently or obtained in the first instance. For products administered under the supervision of a physician, obtaining coverage and adequate reimbursement may be particularly difficult because of the higher prices often associated with such drugs. Additionally, separate reimbursement for the product itself or the treatment or procedure in which the product is used may not be available, which may impact physician utilization.


Ininternationalmarkets,reimbursementandhealthcarepaymentsystemsvarysignificantlybycountry,and manycountrieshaveinstitutedpriceceilingsonspecificproductsandtherapies.Forexample,theEuropean Unionprovidesoptionsforitsmemberstatestorestricttherangeofmedicinalproductsforwhichtheirnational healthinsurancesystemsprovidereimbursementandtocontrolthepricesofmedicinalproductsforhumanuse. Amemberstatemayapproveaspecificpriceforthemedicinalproductoritmayinsteadadoptasystemofdirect orindirectcontrolsontheprofitabilityofthecompanyplacingthemedicinalproductonthemarket. Pharmaceuticalproductsmayfacecompetitionfromlower-pricedproductsinforeigncountriesthathaveplaced price controls on pharmaceutical products. Furthermore, there can be no assurance that a product will be consideredmedicallyreasonableandnecessaryforaspecificindication,thataproductwillbeconsideredcost-effectivebythird-partypayors,thatanadequatelevelofreimbursementwillbeestablishedevenifcoverageis availableorthatthethird-partypayor’sreimbursementpolicieswillnotadverselyaffecttheabilitytosella productprofitably.

Healthcare Reform

IntheUnitedStatesandcertainforeignjurisdictions,therehavebeen,andweexpecttherewillcontinueto be,anumberoflegislativeandregulatorychangestothehealthcaresystem.InMarch2010,theACAwassignedintolaw,whichsubstantiallychangedthewayhealthcareisfinancedbybothgovernmentaland privateinsurersintheUnitedStatesandsignificantlyaffectedthepharmaceuticalindustry.TheACA containsanumberofprovisions,includingthosegoverningenrollmentinfederalhealthcareprograms, reimbursementadjustmentsandfraudandabusechanges.Additionally,theACA increasedthe minimumlevelofMedicaidrebatespayablebymanufacturersofbrandnamedrugsfrom15.1%to23.1%; required collection of rebates for drugs paid by Medicaid managed care organizations; required manufacturers to participate in a coverage gap discount program, under which they must agree to offer 70% point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D; imposed a non-deductible annual fee on pharmaceutical manufacturers or importers who sell certain “branded prescription drugs” to specified federal government programs; implemented a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted or injected; expanded eligibility criteria for Medicaid programs; created a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research,

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 collection

ofrebatesalong with funding fordrugspaidbyMedicaidmanagedcareorganizations;requiredmanufacturersto participateinacoveragegapdiscountprogram,underwhichtheymustagreetooffer70percentpoint-of-sale discountsoffnegotiatedpricesofapplicablebranddrugstoeligiblebeneficiariesduringtheircoveragegap period,asaconditionforthemanufacturer’soutpatientdrugstobecoveredunderMedicarePartD;imposed such research; and established a non-deductibleannualfeeonpharmaceuticalmanufacturersorimporterswhosellcertain“brandedprescription drugs”tospecifiedfederalgovernmentprograms;implementedanewmethodologybywhichrebatesowedbymanufacturersundertheMedicaidDrugRebateProgramarecalculatedCenter fordrugsthatareinhaled,infused, instilled,implantedorinjected;expandedeligibilitycriteriaforMedicaidprograms;createdanewPatient-CenteredOutcomesResearchInstitutetooversee,identifyprioritiesin, Medicare andconductcomparativeclinical effectivenessresearch,alongwithfundingforsuchresearch;andestablishedaCenterforMedicareandMedicaid InnovationatCMStotestinnovativepaymentandservicedeliverymodelstolowerMedicareandMedicaid spending, potentiallyincludingprescriptiondrug spending.

Since its enactment, there have been judicial, Congressional and executive branch challenges to certain aspects of the Affordable Care Act.ACA. On June 17, 2021, the U.S. Supreme Court dismissed the most recent judicial challenge to the ACA without specifically ruling on the constitutionality of the ACA. Prior to the Supreme Court’s decision, President Biden issued an executive order to initiate a special enrollment period from February 15, 2021 through August 15, 2021 for purposes of obtaining health insurance coverage through the ACA marketplace. The executive order also instructed certain governmental agencies to review and reconsider their existing policies and rules that limit access to healthcare, including among others, reexamining Medicaid demonstration projects and waiver programs that include work requirements, and policies that create unnecessary barriers to obtaining access to health insurance coverage through Medicaid or the ACA. It is unclear how other healthcare reform measures

Other legislative changes have been proposed and adopted since the Affordable Care Act was enacted, including aggregate reductions of the Biden administrationMedicare payments to providers, which will impact our business.

OtherlegislativechangeshavebeenproposedandadoptedsincetheAffordableCareActwasenacted, includingaggregatereductionsofMedicarepaymentstoprovidersof2%perfiscalyearandreducedpaymentsto severaltypesofMedicareproviders,whichwillremainineffectthrough2031, 2032, with the exception of a temporary suspension from May 1, 2020 through March 31, 2022,absentadditionalCongressional action. In addition, on March 11, 2021, the American Rescue Plan Act of 2021 was signed into law, which eliminates the statutory Medicaid drug rebate cap, currently set at 100% of a drug’s average manufacturer price, beginning January 1, 2024.

Moreover, there has recently been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products, which has resulted in several Congressional inquiries and proposed and enacted legislation designed, among other things, to bring more transparency to product pricing, review the relationship between pricing and manufacturer patient programs and reform government program reimbursement methodologies for pharmaceutical products. On August 16, 2022, the Inflation Reduction Act of 2022, or IRA, was into law. Among other things, the IRA requires manufacturers of certain drugs to engage in price negotiations with Medicare (beginning in 2026), imposes rebates under Medicare Part B and Medicare Part D to penalize price increases that outpace inflation (first due in 2023), and replaces the Part D coverage gap discount program with a new discounting program (beginning in 2025). The IRA permits the Secretary of the Department of Health and Human Services to implement many of these provisions through guidance, as opposed to regulation, for the initial years. For that and other reasons, it is currently unclear how the IRA will be effectuated. Individual states in the United States have also become increasingly active in implementing regulations designed to control pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and


transparency measures and, in some cases, mechanisms to encourage importation from other countries and bulk purchasing. Furthermore, there has been increased interest by third-party payors and governmental authorities in reference pricing systems and publication of discounts and list prices.

We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare product candidates and services, which could result in reduced demand for our product candidates once approved or additional pricing pressures.

Human Capital Resources

Asof December 31,2021, 2022, wehad 61 80 full-timeemployees, 45 64 ofwhomwereprimarilyengagedinresearchand developmentactivities.Atotalof 22 27 employeeshaveanM.D.,Ph.D.orPharm.D.degree.Mostofour employeesarebasedin our Brisbane,California facility, subject to hybrid and remote work arrangements.

We believe that our future success will depend, in part, on our ability to continue to attract, hire, and retain qualified personnel. We continue to seek additions to our science and technical staff. Through our experience with technological innovation, we appreciate the importance of retention, growth and development of our employees. We believe we offer competitive compensation (including salary, incentive bonus, and equity) and benefits packages. Noneofouremployeesisrepresentedbyalabor union, and weconsiderour employeerelationsto be good.

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Corporate Information

We were incorporated under the laws of the State of Delaware on March 3, 2011. Our principal executive offices are located at 1400 Sierra Point Parkway, Bldg C, Suite 200, Brisbane, California 94005, and our telephone number is (650) 822-5500. Our corporate website address is www.annexonbio.com. Information contained on, or accessible through, our website shall not be deemed incorporated into and is not a part of this Annual Report on Form 10-K.

Available Information

We file Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, proxy statements, and related amendments, exhibits and other information with the Securities and Exchange Commission, or the SEC. You may access and read our filings without charge through the SEC’s website at www.sec.gov or through our website at https://ir.annexonbio.com/financial-information/sec-filings, as soon as reasonably practicable after such materials are electronically filed with or furnished to the SEC pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Information contained on, or accessible through, our website shall not be deemed incorporated into and is not a part of this Annual Report on Form 10-K.


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Item 1A. Risk Factors.

Our business involves significant risks, some of which are described below. You should carefully consider the risks and uncertainties described below, together with all of the other information contained in this Annual Report on Form 10-K, including "Management's Discussion and Analysis of Financial Condition and Results of Operations" and the financial statements and the related notes. If any of the following risks actually occur, it could harm our business, prospects, operating results of operations and financial condition and future prospects. In such event, the market price of our common stock could decline and you could lose all or part of your investment. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also impair our business operations. This Annual Report on Form 10-K also contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those anticipated in the forward-looking statements as a result of factors that are described below and elsewhere in this Annual Report on Form 10-K.

Risks Related to Our Limited Operating History, Financial ConditionRisk Factor Summary

The following summarizes the most material risks that make an investment in our securities risky or speculative. If any of the following risks occur or persist, our business, financial condition and Capital Requirementsresults of operations could be materially harmed and the price of our common stock could significantly decline.

We are a clinical-stage biopharmaceutical company with a limited operating history and no products approved for commercial sale. We have incurred significant losses since our inception, and we anticipate that we will continue to incur significant losses for the foreseeable future, which, together with our limited operating history, makes it difficult to assess our future viability.
We will require substantial additional financing to achieve our goals, and a failure to obtain this necessary capital when needed on acceptable terms, or at all, could force us to delay, limit, reduce or terminate our product development programs, commercialization efforts or other operations.
Our business is heavily dependent on the successful development, regulatory approval and commercialization of our product candidates, which are in early stages of clinical development.
Public health crises such as pandemics or similar outbreaks have, and could in the future, materially and adversely affect our preclinical and clinical trials, business, financial condition and results of operations.
Research and development of biopharmaceutical products is inherently risky. We cannot give any assurance that any of our product candidates will receive regulatory approval, which is necessary before they can be commercialized.
Adverse events or undesirable side effects caused by, or other unexpected properties of, any of our product candidates could halt their clinical development, delay or prevent their regulatory approval, limit their commercial potential or result in significant negative consequences.
We rely on third-party suppliers to manufacture our product candidates, and we intend to rely on third parties to produce commercial supplies of any approved product. The loss of these suppliers, or their failure to comply with applicable regulatory requirements or to provide us with sufficient quantities at acceptable quality levels or prices, or at all, would materially and adversely affect our business.
Any collaboration arrangements that we may enter into in the future may not be successful, which could adversely affect our ability to develop and commercialize our product candidates.
Our current and any future product candidates or products could be alleged to infringe patent rights and other proprietary rights of third parties, which may require costly litigation and, if we are not successful, could cause us to pay substantial damages and/or limit our ability to commercialize our products.

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Risks Related to Our Limited Operating History, Financial Condition and Capital Requirements

We are a clinical-stage biopharmaceutical company with a limited operating history and no products approved for commercial sale. We have incurred significant losses since our inception, and we anticipate that we will continue to incur significant losses for the foreseeable future, which, together with our limited operating history, makes it difficult to assess our future viability.

We are a clinical-stage biopharmaceutical company, and we have only a limited operating history upon which you can evaluate our business and prospects. Biopharmaceutical product development is a highly speculative undertaking and involves a substantial degree of risk. We have no products approved for commercial sale and have not generated any revenue from sales of our product candidates and have incurred losses in each year since our inception in March 2011. We have only a limited operating history upon which you can evaluate our business and prospects. In addition, we have not yet demonstrated an ability to successfully overcome many of the risks and uncertainties frequently encountered by companies in new and rapidly evolving fields, particularly in the pharmaceutical, biopharmaceutical and biotechnology industry.

We have had significant operating losses since our inception. Our net loss for the years ended December 31, 20212022 and 20202021 was approximately $130.3$141.9 million and $63.4$130.3 million, respectively. As of December 31, 2021,2022, we had an accumulated deficit of $296.3$438.3 million. Substantially all of our losses have resulted from expenses incurred in connection with our research and development programs and from general and administrative costs associated with our operations. We expect to continue to incur losses for the foreseeable future, and we anticipate these losses will increase as we continue to develop our product candidates, conduct clinical trials and pursue research and development activities. Even if we achieve profitability in the future, we may not be able to sustain profitability in subsequent periods. Our prior losses, combined with expected future losses, have had and will continue to have an adverse effect on our stockholders’ equity and working capital.

We will require substantial additional financing to achieve our goals, and a failure to obtain this necessary capital when needed on acceptable terms, or at all, could force us to delay, limit, reduce or terminate our product development programs, commercialization efforts or other operations.

Since our inception, we have invested a significant portion of our efforts and financial resources in research and development activities. Our product candidates will require additional clinical development, and we intend to conduct additional research and development activities to discover and develop new product candidates, including conducting preclinical studies and clinical trials, all of which will require substantial additional funds. We will continue to expend significant resources for the foreseeable future in connection with these activities. These expenditures will include costs associated with conducting preclinical studies and clinical trials, obtaining regulatory approvals and manufacturing and supply, as well as marketing and selling any products approved for sale. In addition, other unanticipated costs may arise. Because the outcome of any preclinical study or clinical trial is highly uncertain, we cannot reasonably estimate the actual amounts necessary to successfully complete the development and commercialization of our product candidates or any future product candidates.

As of December 31, 2021,2022, we had capital resources consisting of cash and cash equivalents and short-term investments of approximately $242.7 million. We expect our existing capital resources willto fund our planned operating expenses into the first quarter of 2024.2025. However, our operating plans may change as a result of many factors currently


unknown to us, and we may need to seek additional funds sooner than planned through public or private equity offerings or debt financings or other sources, such as strategic collaborations. Such financing may result in dilution to our stockholders, imposition of burdensome debt covenants and repayment obligations, or other restrictions that may affect our business. 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.

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Our future capital requirements depend on many factors, including:

the scope, progress, results and costs of researching and developing our current product candidates or any other future product candidates we choose to pursue, conducting preclinical studies and clinical trials, and delays related to the COVID-19 pandemic;
the timing of, and the costs involved in, obtaining regulatory approvals for our product candidates or any future product candidates;
the number and characteristics of any additional product candidates we develop or acquire;
the timing and amount of any milestone, royalty and/or other payments we are required to make pursuant to our current or any future license or collaboration agreements;
the cost of manufacturing our product candidates or any future product candidates and any products we successfully commercialize;
the cost of building a sales force in anticipation of product commercialization;
the cost of commercialization activities of our product candidates, if approved for sale, including marketing, sales and distribution costs;
our ability to establish strategic collaborations, licensing or other arrangements and the financial terms of any such agreements, including the timing and amount of any future milestone, royalty or other payments due under any such agreement;
any product liability or other lawsuits related to our products;
the expenses needed to attract, hire and retain skilled personnel;
the costs associated with being a public company;
the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing our intellectual property portfolio;
the timing, receipt and amount of sales of any future approved products; and
the impact of the COVID-19 pandemic, which may exacerbate the magnitude of the factors discussed above.

the scope, progress, results and costs of researching and developing our current product candidates or any other future product candidates we choose to pursue, and conducting preclinical studies and clinical trials, and delays related to the COVID-19 pandemic;

the timing of, and the costs involved in, obtaining regulatory approvals for our product candidates or any future product candidates;

the number and characteristics of any additional product candidates we develop or acquire;

the timing and amount of any milestone, royalty and/or other payments we are required to make pursuant to our current or any future license or collaboration agreements;

the cost of manufacturing our product candidates or any future product candidates and any products we successfully commercialize;

the cost of building a sales force in anticipation of product commercialization;

the cost of commercialization activities of our product candidates, if approved for sale, including marketing, sales and distribution costs;

our ability to establish strategic collaborations, licensing or other arrangements and the financial terms of any such agreements, including the timing and amount of any future milestone, royalty or other payments due under any such agreement;

any product liability or other lawsuits related to our products;

the expenses needed to attract, hire and retain skilled personnel;

the costs associated with being a public company;

the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing our intellectual property portfolio;

the timing, receipt and amount of sales of any future approved products; and

the impact of the COVID-19 pandemic, which may exacerbate the magnitude of the factors discussed above.

Additional funds may not be available when we need them, on terms that are acceptable to us, or at all. Our ability to raise additional capital may be adversely impacted by potential worsening global economic conditions, macroeconomic factors, including increasing inflation and interest rates, exchange rate fluctuations and supply chain disruptions, and the recent disruptions to and volatility in the credit and financial markets in the United States and worldwide resulting from the ongoing COVID-19 pandemic. If adequate funds are not available to us on a timely basis, we may be required to:

delay, limit, reduce or terminate preclinical studies, clinical trials or other development activities for our product candidates or any future product candidate;
delay, limit, reduce or terminate our research and development activities; or
delay, limit, reduce or terminate our efforts to establish manufacturing and sales and marketing capabilities or other activities that may be necessary to commercialize our product candidates or any future product candidate or reduce our flexibility in developing or maintaining our sales and marketing strategy.

delay, limit, reduce or terminate preclinical studies, clinical trials or other development activities for our product candidates or any future product candidate;

delay, limit, reduce or terminate our research and development activities; or

delay, limit, reduce or terminate our efforts to establish manufacturing and sales and marketing capabilities or other activities that may be necessary to commercialize our product candidates or any future product candidate, or reduce our flexibility in developing or maintaining our sales and marketing strategy.

We also could be required to seek funds through arrangements with collaborators or others that may require us to relinquish rights to some of our technologies or product candidates that we would otherwise pursue on our own.


We do not expect to realize revenue from sales of products or royalties from licensed products in the foreseeable future, if at all, and unless and until our product candidates are clinically tested, approved for commercialization and successfully marketed. To date, we have primarily financed our operations through the sale of equity securities and warrants to purchase our equity securities. We will be required to seek additional funding in the future and currently intend to do so through public or private equity offerings or debt financings, credit or loan facilities, collaborations or

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a combination of one or more of these funding sources. Our ability to raise additional funds will depend on financial, economic and other factors, many of which are beyond our control. Additional funds may not be available to us on acceptable terms or at all. If we raise additional funds by issuing equity securities, our stockholders will suffer dilution and the terms of any financing may adversely affect the rights of our stockholders. In addition, as a condition to providing additional funds to us, future investors may demand, and may be granted, rights superior to those of existing stockholders. Debt financing, if available, is likely to involve restrictive covenants limiting our flexibility in conducting future business activities, and, in the event of insolvency, debt holders would be repaid before holders of our equity securities received any distribution of our corporate assets.

Due to the significant resources required for the development of our product candidates, we must prioritize development of certain product candidates and/or certain disease indications. We may expend our limited resources on candidates or indications that do not yield a successful product and fail to capitalize on product candidates or indications that may be more profitable or for which there is a greater likelihood of success.

We are currently focused on developing product candidates to address classical complement-mediated autoimmune and neurodegenerative diseases. We seek to maintain a process of prioritization and resource allocation among our programs to maintain a balance between aggressively advancing our product candidates in identified indications and exploring additional indications or mechanisms as well as developing future product candidates. However, due to the significant resources required for the development of our product candidates, we must focus on specific diseases and disease pathways and decide which product candidates to pursue and the amount of resources to allocate to each such product candidate.

Our decisions concerning the allocation of research, development, collaboration, management and financial resources toward particular product candidates or therapeutic areas may not lead to the development of any viable commercial product and may divert resources away from better opportunities. Similarly, any decision to delay, terminate or collaborate with third parties in respect of certain programs may subsequently also prove to be suboptimal and could cause us to miss valuable opportunities. If we make incorrect determinations regarding the viability or market potential of any of our programs or product candidates or misread trends in the autoimmune or neurodegenerative or pharmaceutical, biopharmaceutical or biotechnology industry, our business, financial condition and results of operations could be materially adversely affected. As a result, we may fail to capitalize on viable commercial products or profitable market opportunities, be required to forego or delay pursuit of opportunities with other product candidates or other diseases and disease pathways that may later prove to have greater commercial potential than those we choose to pursue, or relinquish valuable rights to such product candidates through collaboration, licensing or other royalty arrangements in cases in which it would have been advantageous for us to invest additional resources to retain development and commercialization rights.

Our operating results of operations may fluctuate significantly, which makes our future operating results of operations difficult to predict and could cause our operating results of operations to fall below expectations.

Our quarterly and annual operating results of operations may fluctuate significantly, which makes it difficult for us to predict our future operating results.results of operations. These fluctuations may occur due to a variety of factors, many of which are outside of our control and may be difficult to predict, including:

the timing and cost of, and level of investment in, research, development and, if approved, commercialization activities relating to our product candidates, which may change from time to time;
the timing and status of enrollment for our clinical trials;
the cost of manufacturing our product candidates, as well as building out our supply chain, which may vary depending on the quantity of production and the terms of our agreements with manufacturers;
expenditures that we may incur to acquire, develop or commercialize additional product candidates and technologies;
timing and amount of any milestone, royalty or other payments due under any collaboration or license agreement;
future accounting pronouncements or changes in our accounting policies;

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the timing and success or failure of preclinical studies and clinical trials for our product candidates or competing product candidates, or any other change in the competitive landscape of our industry, including consolidation among our competitors or partners;
the timing of receipt of approvals for our product candidates from regulatory authorities in the United States and internationally;
coverage and reimbursement policies with respect to our product candidates, if approved, and potential future drugs that compete with our products; and
the level of demand for our product candidates, if approved, which may vary significantly over time.

the timing and cost of, and level of investment in, research, development and, if approved, commercialization activities relating to our product candidates, which may change from time to time;

the timing and status of enrollment for our clinical trials;

the cost of manufacturing our product candidates, as well as building out our supply chain, which may vary depending on the quantity of production and the terms of our agreements with manufacturers;


expenditures that we may incur to acquire, develop or commercialize additional product candidates and technologies;

timing and amount of any milestone, royalty or other payments due under any collaboration or license agreement;

future accounting pronouncements or changes in our accounting policies;

the timing and success or failure of preclinical studies and clinical trials for our product candidates or competing product candidates, or any other change in the competitive landscape of our industry, including consolidation among our competitors or partners;

the timing of receipt of approvals for our product candidates from regulatory authorities in the United States and internationally;

coverage and reimbursement policies with respect to our product candidates, if approved, and potential future drugs that compete with our products; and

the level of demand for our product candidates, if approved, which may vary significantly over time.

The cumulative effects of these factors could result in large fluctuations and unpredictability in our quarterly and annual operating results.results of operations. As a result, comparing our operating results of operations on a period-to-period basis may not be meaningful. Investors should not rely on our past results as an indication of our future performance.

This variability and unpredictability could also result in our failing to meet the expectations of industry or financial analysts or investors for any period. If our revenue or operating results of operations fall below the expectations of analysts or investors or below any forecasts we may provide to the market, or if any forecasts we provide to the market are below the expectations of analysts or investors, the price of our common stock could decline substantially. Such a stock price decline could occur even when we have met any previously publicly stated revenue or earnings guidance we may provide.

Risks Related to Our Business

Our business is heavily dependent on the successful development, regulatory approval and commercialization of our product candidates, which are in early stages of clinical development.

We have no products approved for sale, and our product candidates are in early stages of clinical development. The success of our business, including our ability to finance our company and generate revenue in the future, will primarily depend on the successful development, regulatory approval and commercialization of our product candidates and, in particular, the advancement of our current clinical-stage product candidates. However, given ourthe stage of development of our product candidates, it may be many years, if we succeed at all, before we have demonstrated the safety, purity, potency and/or efficacy of a product candidate sufficient to warrant approval for commercialization. We cannot be certain that our product candidates will receive regulatory approval or be successfully commercialized even if we receive regulatory approval.

While inhibition of the complement pathway has been validated as a therapeutic approach, C1q inhibition is a novel therapeutic approach, which exposes us to certain risks. For example, we may discover that our product candidates do not possess certain properties required for therapeutic effectiveness, or that even if found to be effective in one type of disease, a product candidate, or the therapeutic approach, isthey are not effective in other diseases.types of disease. In addition, given the novel nature of this therapeutic approach, designing preclinical studies and clinical trials to demonstrate the effect of the product candidates is complex and exposes us to risks, including that our biomarker-driven approach may not translate into therapeutic effectiveness.

In the future, we may also become dependent on other product candidates that we may develop or acquire. The clinical and commercial success of our product candidates and future product candidates will depend on a number of factors, including the following:

the COVID-19 pandemic, which may result in clinical site closures, delays to patient enrollment, patients discontinuing their treatment or follow up visits or changes to trial protocols;

the COVID-19 pandemic, which may result in clinical site closures, delays to patient enrollment, patients discontinuing their treatment or follow up visits or changes to trial protocols;

our ability to raise any additional required capital on acceptable terms, or at all;

our ability to raise any additional required capital on acceptable terms, or at all;

our ability to complete an investigational new drug application, or IND, enable studies and successfully submit INDs or comparable applications;

49


timely completion of our preclinical studies and clinical trials, which may be significantly slower or cost more than we currently anticipate and will depend substantially upon the performance of third-party contractors;

our ability to complete an investigational new drug application, or IND, enabling studies and successfully submit INDs or comparable applications;

whether we are required by the U.S. Food and Drug Administration, or the FDA, or similar foreign regulatory agencies to conduct additional clinical trials or other studies beyond those planned to support the approval and commercialization of our product candidates or any future product candidates;

timely completion of our preclinical studies and clinical trials, which may be significantly slower or cost more than we currently anticipate and will depend substantially upon the performance of third-party contractors;

acceptance of our proposed indications and primary endpoint assessments relating to the proposed indications of our product candidates by the FDA and similar foreign regulatory authorities;

whether we are required by the U.S. Food and Drug Administration, or FDA, or similar foreign regulatory agencies to conduct additional clinical trials or other studies beyond those planned to support the approval and commercialization of our product candidates or any future product candidates;

our ability to demonstrate to the satisfaction of the FDA and similar foreign regulatory authorities the safety, efficacy and acceptable risk to benefit profile of our product candidates or any future product candidates;

acceptance of our proposed indications and primary endpoint assessments relating to the proposed indications of our product candidates by the FDA and similar foreign regulatory authorities;

the prevalence, duration and severity of potential side effects or other safety issues experienced with our product candidates or future approved products, if any;

our ability to demonstrate to the satisfaction of the FDA and similar foreign regulatory authorities the safety, efficacy and acceptable risk to benefit profile of our product candidates or any future product candidates;

the timely receipt of necessary marketing approvals from the FDA and similar foreign regulatory authorities;

the prevalence, duration and severity of potential side effects or other safety issues experienced with our product candidates or future approved products, if any;

achieving and maintaining, and, where applicable, ensuring that our third-party contractors achieve and maintain compliance with our contractual obligations and with all regulatory requirements applicable to our product candidates or any future product candidates or approved products, if any;

the timely receipt of necessary marketing approvals from the FDA and similar foreign regulatory authorities;

the ability of third parties with whom we contract to manufacture adequate clinical trial and commercial supplies of our product candidates or any future product candidates remain in good standing with regulatory agencies and develop, validate and maintain commercially viable manufacturing processes that are compliant with current good manufacturing practices, or cGMPs;

achieving and maintaining, and, where applicable, ensuring that our third-party contractors achieve and maintain compliance with our contractual obligations and with all regulatory requirements applicable to our product candidates or any future product candidates or approved products, if any;

our ability to successfully develop a commercial strategy and thereafter commercialize our product candidates or any future product candidates in the United States and internationally, if approved for marketing, reimbursement, sale and distribution in such countries and territories, whether alone or in collaboration with others;

the ability of third parties with whom we contract to manufacture adequate clinical trial and commercial supplies of our product candidates or any future product candidates remain in good standing with regulatory agencies and develop, validate and maintain commercially viable manufacturing processes that are compliant with current good manufacturing practices, or cGMPs;

our ability to achieve sufficient market acceptance, coverage and adequate reimbursement from third-party payors and adequate market share and revenue for any approved products;

our ability to successfully develop a commercial strategy and thereafter commercialize our product candidates or any future product candidates in the United States and internationally, if approved for marketing, reimbursement, sale and distribution in such countries and territories, whether alone or in collaboration with others;

the convenience of our treatment or dosing regimen;

our ability to achieve sufficient market acceptance, coverage and adequate reimbursement from third-party payors and adequate market share and revenue for any approved products;

acceptance by physicians, payors and patients of the benefits, safety and efficacy of our product candidates or any future product candidates, if approved, including relative to alternative and competing treatments;

the convenience of our treatment or dosing regimen;

the willingness of physicians, operators of clinics and patients to utilize or adopt any of our product candidates or any future product candidates, if approved;

acceptance by physicians, payors and patients of the benefits, safety and efficacy of our product candidates or any future product candidates, if approved, including relative to alternative and competing treatments;

patient demand for our product candidates, if approved, including the willingness of patients to pay out-of-pocket for any approved products in the absence of coverage and/or adequate reimbursement from third-party payors;

the willingness of physicians, operators of clinics and patients to utilize or adopt any of our product candidates or any future product candidates, if approved;

our ability to establish and enforce intellectual property rights in and to our product candidates or any future product candidates; and

patients’ willingness to enroll or continue to participate in a clinical trial during the COVID-19 pandemic;

our ability to avoid third-party patent interference, intellectual property challenges or intellectual property infringement claims.

patient demand for our product candidates, if approved, including patients’ willingness to pay out-of-pocket for any approved products in the absence of coverage and/or adequate reimbursement from third-party payors;

our ability to establish and enforce intellectual property rights in and to our product candidates or any future product candidates; and

our ability to avoid third-party patent interference, intellectual property challenges or intellectual property infringement claims.


These factors, many of which are beyond our control, could cause us to experience significant delays or an inability to obtain regulatory approvals or commercialize our product candidates. Even if regulatory approvals are obtained, we may never be able to successfully commercialize any of our product candidates. Accordingly, we cannot provide assurances that we will be able to generate sufficient revenue through the sale of our product candidates or any future product candidates to continue our business or achieve profitability.

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Public health crises such as pandemics or similar outbreaks have, and could in the future, materially and adversely affect our preclinical and clinical trials, business, financial condition and results of operations.

In March 2020, the World Health Organization declared COVID-19 a global pandemic and the United States declared a national emergency with respect to the COVID-19 pandemic. In response to the COVID-19 pandemic, and more recently in connection with the spread of the Delta and omicron variants, “shelter in place” orders and other public health guidance measures have beenwere implemented across much of the United States and Europe, including in the locations of our offices, clinical trial sites, key vendors and partners. We expect that our clinical development program timelines will continue to be negatively affected by the COVID-19 pandemic, which could materially and adversely affect our business, financial condition and results of operations. For instance, we have experienced interruption in clinical trial activities in Bangladesh due to quarantines, shortages in clinical site staff, longer timelines for clinical site initiation and temporary shortages in lab kits and supplies. Further, due to “shelterAdditionally, the COVID-19 pandemic has adversely impacted hospitals and medical facilities where we are currently conducting our clinical trials and has resulted in place” orders and other public health guidance measures, we have implemented a work-from-home policyincreased competition for all staff members excluding those necessary to maintain minimum basic operations.more limited hospital resources among companies conducting clinical trials. Our increased reliance on personnel working from home has, and may continue to, negatively impact productivity, or disrupt, delay or otherwise adversely impact our business. For example, with our personnel working from home, some of our research activities that require our personnel to be in our laboratories have been delayed.

As a result of the COVID-19 pandemic, or similar pandemics, and related “shelter in place” orders and other public health guidance measures, we have experienced, and may in the future experience, disruptions that could materially and adversely impact our clinical trials, business, financial condition and results of operations. These disruptions include but are not limited to:

delays or difficulties in enrolling patients in our clinical trials;
delays or difficulties in initiating or expanding clinical trials, including delays or difficulties with clinical site initiation and recruiting clinical site investigators and clinical site staff;
increased rates of patients withdrawing from our clinical trials following enrollment as a result of contracting COVID-19 or other health conditions or being forced to quarantine;
interruption of key clinical trial activities, such as clinical trial site data monitoring and efficacy, safety and translational data collection, processing and analyses, due to limitations on travel imposed or recommended by federal, state or local governments, employers and others or interruption of clinical trial subject visits, which may impact the collection and integrity of subject data and clinical study endpoints;
diversion of healthcare resources away from the conduct of clinical trials, including the diversion of hospitals serving as our clinical trial sites and hospital staff supporting the conduct of our clinical trials;
delays or disruptions in preclinical experiments and IND-enabling studies due to restrictions of on-site staff and unforeseen circumstances at contract research organizations, or CROs, and vendors;
interruption or delays in the operations of the FDA and comparable foreign regulatory agencies;
interruption of, or delays in receiving, supplies of our product candidates from our contract manufacturing organizations due to staffing shortages, production slowdowns or stoppages and disruptions in delivery systems;
delays in receiving approval from local regulatory authorities to initiate our planned clinical trials;
limitations on employee or other resources that would otherwise be focused on the conduct of our clinical trials and pre-clinical work, including because of sickness of employees or their families, the desire of employees to avoid travel or contact with large groups of people, an increased reliance on working from home, school closures or mass transit disruptions;
changes in regulations as part of a response to the COVID-19 pandemic which may require us to change the ways in which our clinical trials are conducted, which may result in unexpected costs, or to discontinue such clinical trials altogether;
delays in necessary interactions with regulators, ethics committees and other important agencies and contractors due to limitations in employee resources or forced furlough of government or contractor personnel; and

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refusal of the FDA to accept data from clinical trials in affected geographies outside the United States.

delays or difficulties in enrolling patients in our clinical trials;

delays or difficulties in initiating or expanding clinical trials, including delays or difficulties with clinical site initiation and recruiting clinical site investigators and clinical site staff;

increased rates of patients withdrawing from our clinical trials following enrollment as a result of contracting COVID-19 or other health conditions or being forced to quarantine;

interruption of key clinical trial activities, such as clinical trial site data monitoring and efficacy, safety and translational data collection, processing and analyses, due to limitations on travel imposed or recommended by federal, state or local governments, employers and others or interruption of clinical trial subject visits, which may impact the collection and integrity of subject data and clinical study endpoints;

diversion of healthcare resources away from the conduct of clinical trials, including the diversion of hospitals serving as our clinical trial sites and hospital staff supporting the conduct of our clinical trials;

delays or disruptions in preclinical experiments and IND-enabling studies due to restrictions of on-site staff and unforeseen circumstances at contract research organizations, or CROs, and vendors;

interruption or delays in the operations of the FDA and comparable foreign regulatory agencies;

interruption of, or delays in receiving, supplies of our product candidates from our contract manufacturing organizations due to staffing shortages, production slowdowns or stoppages and disruptions in delivery systems;

delays in receiving approval from local regulatory authorities to initiate our planned clinical trials;

limitations on employee or other resources that would otherwise be focused on the conduct of our clinical trials and pre-clinical work, including because of sickness of employees or their families, the desire of employees to avoid travel or contact with large groups of people, an increased reliance on working from home, school closures or mass transit disruptions;


changes in regulations as part of a response to the COVID-19 pandemic which may require us to change the ways in which our clinical trials are conducted, which may result in unexpected costs, or to discontinue such clinical trials altogether;

delays in necessary interactions with regulators, ethics committees and other important agencies and contractors due to limitations in employee resources or forced furlough of government or contractor personnel; and

refusal of the FDA to accept data from clinical trials in affected geographies outside the United States.

These and other factors arising from the COVID-19 pandemic could worsen or could return in countries where the COVID-19 pandemic has been partially contained, each of which could further adversely impact our ability to conduct clinical trials and our business generally, and could materially and adversely affect our business, financial condition and results of operations.

In particular, the COVID-19 pandemic has adversely impacted hospitals and medical facilities where we are currently conducting our clinical trials and has resulted in increased competition among companies conducting clinical trials for more limited hospital space.

The COVID-19 pandemic continues to rapidly evolve. The extent to which the outbreak may continue to affect our clinical trials, business, financial condition, results of operations, and clinical development timelines and plans will depend on future developments, which are highly uncertain and cannot be predicted at this time, such as the duration of the outbreak, the emergence of new variants, rates of infection in the locations in which we and our CROs, third-party manufacturers, regulatory authorities and other third parties with whom we do business operate, travel restrictions and actions to contain the outbreak or treat its impact, such as social distancing and quarantines or lock-downs 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 disease. Future developments in these and other areas present material uncertainty and risk with respect to our clinical trials, business, financial condition and results of operations.

Research and development of biopharmaceutical products is inherently risky. We cannot give any assurance that any of our product candidates will receive regulatory approval, which is necessary before they can be commercialized.

We are at an early stage of clinical development of our product candidates. Our future success is dependent on our ability to successfully develop, obtain regulatory approval for and then successfully commercialize our product candidates, and we may fail to do so for many reasons, including the following:

our product candidates may not successfully complete preclinical studies or clinical trials;
a product candidate may be shown to have harmful side effects or other characteristics that indicate it does not meet applicable regulatory criteria;
our competitors may develop therapeutics that render our product candidates obsolete or less attractive;
the market for a product candidate may change so that the continued development of that product candidate is no longer reasonable or commercially attractive;
a product candidate may not be capable of being produced in commercial quantities at an acceptable cost, or at all;
if a product candidate obtains regulatory approval, we may be unable to establish sales and marketing capabilities, or successfully market such approved product candidate; and
a product candidate may not be accepted as safe and effective by patients, the medical community or third-party payors.

our product candidates may not successfully complete preclinical studies or clinical trials;

a product candidate may on further study be shown to have harmful side effects or other characteristics that indicate it does not meet applicable regulatory criteria;

our competitors may develop therapeutics that render our product candidates obsolete or less attractive;

the market for a product candidate may change so that the continued development of that product candidate is no longer reasonable or commercially attractive;

a product candidate may not be capable of being produced in commercial quantities at an acceptable cost, or at all;

if a product candidate obtains regulatory approval, we may be unable to establish sales and marketing capabilities, or successfully market such approved product candidate; and

a product candidate may not be accepted as safe and effective by patients, the medical community or third-party payors.

If any of these events occur, we may be forced to abandon our development efforts for a product candidate or candidates, which would have a material adverse effect on our business and could potentially cause us to cease


operations. Failure of a product candidate may occur at any stage of preclinical or clinical development, and we may never succeed in developing marketable products or generating product revenue.

We may not be successful in our efforts to further develop our current and future product candidates. We are not permitted to market or promote any of our product candidates before we receive regulatory approval from the FDA or comparable foreign regulatory authorities, and we may never receive such regulatory approval for any of our product candidates. Each of our product candidates will require significant additional clinical development, management of preclinical, clinical and manufacturing activities, regulatory approval, adequate manufacturing supply, a commercial organization and significant marketing efforts before we generate any revenue from product sales, if at all. Any clinical studies that we may conduct may not demonstrate the efficacy and safety necessary to obtain regulatory approval to market our product candidates. If the results of our ongoing or future clinical studies are

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inconclusive with respect to the efficacy of our product candidates, if we do not meet the clinical endpoints with statistical significance or if there are safety concerns or adverse events associated with our product candidates, we may be prevented or delayed in obtaining marketing approval for our product candidates.

The FDA or other regulatory agencies may not agree with our clinical development plan and require that we conduct additional clinical trials to support our regulatory submissions. We have not yet conducted an end of Phase 2 meeting with the FDA to discuss the registration pathway for ANX005, and our current clinical development plans for ANX005 in GBS may change as a result of future interactions with the FDA. For example,submissions, including the FDA may require that we conduct more than one pivotal trial in order to gain approval in GBS. Furthermore, any approval of ANX005 for GBS may be limited to ANX005 in combination with the existing standard of care. While not approved for use in GBS in the United States due to differing levels of efficacy in GBS patients, IVIg has developed as the standard of care in the Western world and parts of Asia for patients with GBS and has led to clinical responses in some GBS patients.approval.

If any of our product candidates successfully completes clinical trials, we plan to seek regulatory approval to market our product candidates in the United States, the European Union, or the EU, and in additional foreign countries where we believe there is a viable commercial opportunity. We have never commenced, compiled or submitted an application seeking regulatory approval to market any product candidate. We may never receive regulatory approval to market any product candidates even if such product candidates successfully complete clinical trials, which would adversely affect our viability. To obtain regulatory approval in countries outside the United States, we must comply with numerous and varying regulatory requirements of such other countries regarding safety, efficacy, chemistry, manufacturing and controls, clinical trials, commercial sales, pricing and distribution of our product candidates. We may also rely on collaborators or partners to conduct the required activities to support an application for regulatory approval and to seek approval for one or more of our product candidates. We cannot be sure that any such collaborators or partners will conduct these activities successfully or do so within the timeframe we desire. Even if we or any future collaborators or partners are successful in obtaining approval in one jurisdiction, we cannot ensure that we will obtain approval in any other jurisdictions. If we are unable to obtain approval for our product candidates in multiple jurisdictions, our revenue and results of operations could be negatively affected.

Even if we receive regulatory approval to market any of our product candidates, we cannot assure you that any such product candidate will be successfully commercialized, widely accepted in the marketplace or more effective than other commercially available alternatives. Any approval we may obtain could be for indications or patient populations that are not as broad as intended or desired or may require labeling that includes significant use or distribution restrictions or safety warnings. We may also be required to perform additional or unanticipated clinical trials to obtain approval or be subject to additional post-marketing testing requirements to maintain approval. In addition, regulatory authorities may withdraw their approval of a product or impose restrictions on its distribution, such as in the form of a Risk Evaluation and Mitigation Strategy, or REMS. The failure to obtain timely regulatory approval of product candidates, any product marketing limitations or a product withdrawal would negatively impact our business, results of operations and financial condition.

We may encounter substantial delays in our clinical trials or may not be able to conduct or complete our clinical trials on the timelines we expect, if at all.

Clinical testing is expensive and can take many years to complete, and its outcome is inherently uncertain. We cannot guarantee that any clinical trials will be conducted as planned or completed on schedule, if at all. We cannot


be sure that submission of an IND or a clinical trial application, or CTA, will result in the FDA or other regulatory authority, as applicable, allowing clinical trials to begin in a timely manner, if at all. For example, prior to the authorization of our IND for HD, the FDA placed the Phase 2 trial on clinical hold in order to obtain additional information on our preclinical data package; we provided the required information, and the clinical hold was lifted in March 2020. Moreover, even if these trials begin, issues may arise that could suspend or terminate such clinical trials. A failure of one or more clinical trials can occur at any stage of testing, and our future clinical trials may not be successful. Clinical trials can be delayed or terminated for a variety of reasons, including delays or failures related to:

the COVID-19 pandemic, which may result in clinical site closures, delays to patient enrollment, patients discontinuing their treatment or follow up visits or changes to trial protocols;
generating sufficient preclinical, toxicology or other in vivo or in vitro data to support the initiation or continuation of clinical trials;
the FDA or comparable foreign regulatory authorities disagreeing as to the design or implementation of our clinical trials;
delays in obtaining regulatory authorization to commence a trial;
reaching agreements on acceptable terms with prospective CROs and clinical trial sites, the terms of which can be subject to extensive negotiation and may vary significantly among different CROs and trial sites;

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identifying, recruiting and training suitable clinical investigators;
obtaining institutional review board, or IRB, approval at each trial site;
imposition of a temporary or permanent clinical hold by regulatory agencies for a number of reasons, including after review of an IND or amendment, or equivalent foreign application or amendment;
new safety findings that present unreasonable risk to clinical trial participants;
a negative finding from an inspection of our clinical trial operations or study sites;
recruiting an adequate number of suitable patients to participate in a trial;
having subjects complete a trial or return for post-treatment follow-up;
clinical trial sites deviating from trial protocol or dropping out of a trial;
addressing subject safety concerns that arise during the course of a trial;
adding a sufficient number of clinical trial sites; or
obtaining sufficient product supply of product candidates for use in preclinical studies or clinical trials from third-party suppliers.

the COVID-19 pandemic, which may result in clinical site closures, delays to patient enrollment, patients discontinuing their treatment or follow up visits or changes to trial protocols;

inability to generate sufficient preclinical, toxicology or other in vivo or in vitro data to support the initiation or continuation of clinical trials;

the FDA or comparable foreign regulatory authorities disagreeing as to the design or implementation of our clinical trials;

delays in obtaining regulatory authorization to commence a trial;

reaching agreement on acceptable terms with prospective CROs and clinical trial sites, the terms of which can be subject to extensive negotiation and may vary significantly among different CROs and trial sites;

identifying, recruiting and training suitable clinical investigators;

obtaining institutional review board, or IRB, approval at each trial site;

imposition of a temporary or permanent clinical hold by regulatory agencies for a number of reasons, including after review of an IND or amendment, or equivalent foreign application or amendment;

new safety findings that present unreasonable risk to clinical trial participants;

a negative finding from an inspection of our clinical trial operations or study sites;

recruiting an adequate number of suitable patients to participate in a trial;

having subjects complete a trial or return for post-treatment follow-up;

clinical sites deviating from trial protocol or dropping out of a trial;

addressing subject safety concerns that arise during the course of a trial;

adding a sufficient number of clinical trial sites; or

obtaining sufficient product supply of product candidates for use in preclinical studies or clinical trials from third-party suppliers.

We may experience numerous adverse or unforeseen events during, or as a result of, preclinical studies and clinical trials which could delay or prevent our ability to receive marketing approval or commercialize our product candidates, including:

we may receive feedback from regulatory authorities that requires us to modify the design of our clinical trials or require that we submit additional data or information before allowing a clinical trial to be initiated;
clinical studies of our product candidates may produce negative or inconclusive results, and we may decide, or regulators may require us, to conduct additional clinical trials or abandon drug development programs;
the number of patients required for clinical trials of our product candidates may be larger than we anticipate, enrollment in these clinical trials may be slower than we anticipate or participants 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, fail to maintain adequate quality controls or be unable to provide us with sufficient product supply to conduct and complete preclinical studies or clinical trials of our product candidates in a timely manner, or at all;
we or our investigators might have to suspend or terminate clinical trials of our product candidates for various reasons, including non-compliance with regulatory requirements, a finding that our product candidates have undesirable side effects or other unexpected characteristics or a finding that the participants are being exposed to unacceptable health risks;
the cost of clinical trials of our product candidates may be greater than we anticipate;
the quality of our product candidates or other materials necessary to conduct preclinical studies or clinical trials of our product candidates may be insufficient or inadequate;
regulators may revise the requirements for approving our product candidates or such requirements may not be as we anticipate; and
any future collaborators may conduct clinical trials in ways they view as advantageous to them but that are suboptimal for us.

we may receive feedback from regulatory authorities that requires us to modify the design of our clinical trials or require that we submit additional data or information before allowing a clinical trial to be initiated;

clinical studies of our product candidates may produce negative or inconclusive results, and we may decide, or regulators may require us, to conduct additional clinical trials or abandon drug development programs;

the number of patients required for clinical trials of our product candidates may be larger than we anticipate, enrollment in these clinical trials may be slower than we anticipate or participants 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, fail to maintain adequate quality controls or be unable to provide us with sufficient product supply to conduct and complete preclinical studies or clinical trials of our product candidates in a timely manner, or at all;


we or our investigators might have to suspend or terminate clinical trials of our product candidates for various reasons, including non-compliance with regulatory requirements, a finding that our product candidates have undesirable side effects or other unexpected characteristics or a finding that the participants are being exposed to unacceptable health risks;

the cost of clinical trials of our product candidates may be greater than we anticipate;

the quality of our product candidates or other materials necessary to conduct preclinical studies or clinical trials of our product candidates may be insufficient or inadequate;

regulators may revise the requirements for approving our product candidates or such requirements may not be as we anticipate; and

any future collaborators may conduct clinical trials in ways they view as advantageous to them but that are suboptimal for us.

If we are required to conduct additional clinical trials or other testing of our product candidates beyond those that we currently contemplate, if we are unable to successfully complete clinical trials of our product candidates or

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other testing, if the results of these trials or tests are not positive or are only moderately positive or if there are safety concerns, we may:

incur unplanned costs;
be delayed in obtaining marketing approval for our product candidates or not obtain marketing approval at all;
obtain marketing approval in some countries and not in others;
obtain marketing approval for indications or patient populations that are not as broad as intended or desired;
obtain marketing approval with labeling that includes significant use or distribution restrictions or safety warnings, including boxed warnings;
be subject to additional post-marketing testing requirements; or
have the product removed from the market after obtaining marketing approval.

For example, we believe that we will be able to seek FDA approval of ANX005 for the treatment of patients with GBS based on the results from a single pivotal trial. However, the FDA may not agree that the data from one pivotal trial are sufficient to warrant approval of ANX005, even if we believe the results are sufficiently positive. In such an event, we would be required to conduct one or more additional clinical trials before seeking FDA approval of ANX005 for patients with GBS, if ever, which would increase our expenses and could delay or prevent commercialization of ANX005 in GBS.

incur unplanned costs;

be delayed in obtaining marketing approval for our product candidates or not obtain marketing approval at all;

obtain marketing approval in some countries and not in others;

obtain marketing approval for indications or patient populations that are not as broad as intended or desired;

obtain marketing approval with labeling that includes significant use or distribution restrictions or safety warnings, including boxed warnings;

be subject to additional post-marketing testing requirements; or

have the product removed from the market after obtaining marketing approval.

In addition, disruptions caused by the COVID-19 pandemic may increase the likelihood that we encounter such difficulties or delays in initiating, enrolling, conducting or completing our planned and ongoing clinical trials. For instance, we have experienced interruption in clinical trial activities in Bangladesh due to quarantines, shortages in clinical site staff, longer timelines for clinical site initiation and temporary shortages in lab kits and supplies. We could also encounter delays if a clinical trial is suspended or terminated by us, by the IRBs of the institutions in which such trials are being conducted, by the Data Safety Monitoring Board, or DSMB, for such trial or by the FDA or other regulatory authorities. Such authorities may suspend or terminate a clinical trial due to a number of factors, including failure to conduct the clinical trial in accordance with regulatory requirements or our clinical protocols, inspection of the clinical trial operations or trial site by the FDA or other regulatory authorities resulting in the imposition of a clinical hold, unforeseen safety issues or adverse side effects, failure to demonstrate a benefit from using a drug, changes in governmental regulations or administrative actions or lack of adequate funding to continue the clinical trial.

Further, conducting clinical trials in foreign countries, as we plan to do for certain of our product candidates, presents additional risks that may delay completion of our clinical trials. These risks include the failure of enrolled patients in foreign countries to adhere to clinical protocol as a result of differences in healthcare services or cultural customs and managing additional administrative burdens associated with foreign regulatory schemes, as well as political and economic risks.

Principal investigators for our clinical trials may serve as scientific advisors or consultants to us from time to time and may receive cash or equity compensation in connection with such services. If these relationships and any related compensation result in perceived or actual conflicts of interest, or a regulatory authority concludes that the


financial relationship may have affected the interpretation of the trial, the integrity of the data generated at the applicable clinical trial site may be questioned and the utility of the clinical trial itself may be jeopardized, which could result in the delay or rejection of the marketing application we submit. Any such delay or rejection could prevent or delay us from commercializing our current or future product candidates.

If we experience delays in the completion, or termination, of any preclinical study or clinical trial of our product candidates, the commercial prospects of our product candidates may be harmed, and our ability to generate revenues from any of these product candidates will be delayed or not realized at all. In addition, any delays in completing our clinical trials may increase our costs, slow down our product candidate development and approval process and jeopardize our ability to commence product sales and generate revenues. Any of these occurrences may materially

55


and adversely affect our business, financial condition, results of operations and prospects. In addition, many of the factors that cause, or lead to, a delay in the commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of our product candidates. If one or more of our product candidates proves to be ineffective, unsafe or commercially unviable, our business, financial condition, results of operations and prospects may be materially and adversely affected.

If we encounter difficulties enrolling patients in our clinical trials, our clinical development activities could be delayed or otherwise adversely affected.

We may not be able to initiate or continue clinical trials on a timely basis or at all for any product candidates we identify or develop if we are unable to locate and enroll a sufficient number of eligible patients to participate in the trials as required by applicable regulations or as needed to provide appropriate statistical power for a given trial. The timely completion of clinical trials in accordance with their protocols depends on, among other things, our ability to enroll a sufficient number of patients who remain in the study until its conclusion. We may experience difficulties in patient enrollment in our clinical trials for a variety of reasons. The enrollment of patients depends on many factors, including:

the severity and difficulty of diagnosing the disease under investigation;
the patient eligibility and exclusion criteria defined in the protocol;
the size of the patient population required for analysis of the trial’s primary endpoints;
the proximity of patients to trial sites;
the design of the trial;
our ability to recruit clinical trial investigators with the appropriate competencies and experience;
the existing body of safety and efficacy data with respect to the study drug and safety concerns;
patient referral practices of physicians;
risk that enrolled subjects will drop out before completion of the trial, including as a result of contracting COVID-19 or other health conditions or being forced to quarantine;
ability to monitor patients adequately during and after treatment;
availability and efficacy of approved medications or therapies, or other clinical trials, for the disease or condition under investigation;
clinicians’ and patients’ perceptions as to the potential advantages of the product candidate being studied in relation to other available therapies, including any new drugs that may be approved for the indications we are investigating; and
our ability to obtain and maintain patient consents.

the severity and difficulty of diagnosing the disease under investigation;

the patient eligibility and exclusion criteria defined in the protocol;

the size of the patient population required for analysis of the trial’s primary endpoints;

the proximity of patients to trial sites;

the design of the trial;

our ability to recruit clinical trial investigators with the appropriate competencies and experience;

the existing body of safety and efficacy data with respect to the study drug and safety concerns;

patient referral practices of physicians;

risk that enrolled subjects will drop out before completion of the trial, including as a result of contracting COVID-19 or other health conditions or being forced to quarantine;

ability to monitor patients adequately during and after treatment;

availability and efficacy of approved medications or therapies, or other clinical trials, for the disease or condition under investigation;

clinicians’ and patients’ perceptions as to the potential advantages of the product candidate being studied in relation to other available therapies, including any new drugs that may be approved for the indications we are investigating; and

our ability to obtain and maintain patient consents.

In addition, our clinical trials may compete with other clinical trials for product candidates that are in the same therapeutic areas as our product candidates, and this competition will reduce the number and types of patients available to us, because some patients who might have opted to enroll in our trials may instead opt to enroll in a trial being conducted by one of our competitors. Because the number of qualified clinical investigators is limited, we may conduct


some of our clinical trials at the same clinical trial sites that some of our competitors use, which will reduce the number of patients who are available for our clinical trials in such clinical trial site. Delays in patient enrollment may result in increased costs or may affect the timing or outcome of the planned clinical trials, which could prevent completion of these trials and adversely affect our ability to advance the development of our product candidates.

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Adverse events or undesirable side effects caused by, or other unexpected properties of, any of our product candidates could halt their clinical development, delay or prevent their regulatory approval, limit their commercial potential or result in significant negative consequences.

Adverse events or other undesirable side effects caused by our product candidates could cause us or regulatory authorities to interrupt, delay or halt clinical trials and could result in a more restrictive label or the delay or denial of regulatory approval by the FDA or comparable foreign regulatory authorities. We have experienced adverse events during clinical trials, and may in the future experience, adverse or unforeseen events during, or as a result of, clinical trials. If unacceptable side effects arise in the development of our product candidates, we, the FDA, the IRBs at the institutions in which our studies are conducted or the DSMB could suspend or terminate our clinical trials or the FDA or comparable foreign regulatory authorities could order us to cease clinical trials or deny approval of our product candidates for any or all targeted indications. Treatment-related side effects could also affect patient recruitment or the ability of enrolled patients to complete any of our clinical trials or result in potential product liability claims. In addition, these side effects may not be appropriately recognized or managed by the treating medical staff. We expect to have to train medical personnel using our product candidates to understand the side effect profiles for our clinical trials and upon any commercialization of any of our product candidates. Inadequate training in recognizing or managing the potential side effects of our product candidates could result in patient injury or death. Any of these occurrences may materially and adversely affect our business, financial condition, results of operations and prospects.

In addition, early clinical trials may only include a limited number of subjects and limited duration of exposure to our product candidates. In particular, we are pursuing a novel approach to inhibiting upstream molecules of the classical complement pathway, primarily C1q, and as a result, our product candidates may cause unforeseen safety events when evaluated in larger patient populations. Further, clinical trials may not be sufficient to determine the effect and safety consequences of taking our product candidates over a multi-year period.

If any of our product candidates receives marketing approval, and we or others later identify undesirable and unforeseen side effects caused by such product, a number of potentially significant negative consequences could result, including but not limited to:

regulatory authorities may suspend, limit or withdraw approvals of such product, or seek an injunction against its manufacture or distribution;
we may be required to conduct additional clinical trials or post-approval studies;
we may be required to recall a product or change the way such product is administered to patients;
additional restrictions may be imposed on the marketing of the particular product or the manufacturing processes for the product or any component thereof;
regulatory authorities may require the addition of labeling statements, such as a “black box” warning or a contraindication, or issue safety alerts, Dear Healthcare Provider letters, press releases or other communications containing warnings or other safety information about the product;
we may be required to implement a REMS or create a Medication Guide outlining the risks of such side effects for distribution to patients, a communication plan for healthcare providers and/or other elements to assure safe use;
we could be sued and held liable for harm caused to patients;
we may be subject to fines, injunctions or the imposition of criminal penalties;
the product may become less competitive; and
our reputation may suffer.

regulatory authorities may suspend, limit or withdraw approvals of such product, or seek an injunction against its manufacture or distribution;

we may be required to conduct additional clinical trials or post-approval studies;

we may be required to recall a product or change the way such product is administered to patients;

additional restrictions may be imposed on the marketing of the particular product or the manufacturing processes for the product or any component thereof;

regulatory authorities may require the addition of labeling statements, such as a “black box” warning or a contraindication, or issue safety alerts, Dear Healthcare Provider letters, press releases or other communications containing warnings or other safety information about the product;

we may be required to implement a REMS or create a Medication Guide outlining the risks of such side effects for distribution to patients, a communication plan for healthcare providers and/or other elements to assure safe use;

we could be sued and held liable for harm caused to patients;

we may be subject to fines, injunctions or the imposition of criminal penalties;

the product may become less competitive; and

our reputation may suffer.


Any of these events could prevent us from achieving or maintaining market acceptance of the particular product candidate, if approved, and result in the loss of significant revenues to us, which would materially and adversely affect our results of operations and business. In addition, if one or more of our product candidates prove to be unsafe, our business, financial condition, results of operations and prospects may be materially and adversely affected.

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Interim, “top-line” and preliminary data from studies or trials that we announce or publish from time to time may change as more data become available and are subject to audit and verification procedures that could result in material changes in the final data.

From time to time, we publicly disclose interim, “top-line” or preliminary data from preclinical studies or clinical trials. Interim data are subject to the risk that one or more of the outcomes may materially change as more data become available. We also make assumptions, estimations, calculations and conclusions as part of our analyses of data, and we may not have received or had the opportunity to fully and carefully evaluate all data when we publish such data. As a result, the “top-line” results that we report may differ from future results of the same studies, or different conclusions or considerations may qualify such results once additional data have been received and fully evaluated. Preliminary“Top-line” or “top-line”preliminary data also remain subject to audit and verification procedures that may result in the final data being materially different from the preliminary data we previously published. As a result, “top-line,”“top-line” and preliminary data should be viewed with caution until the final data are available. From time to time, we also disclose interim preliminary or topline data from our clinical studies. Interim data from clinical trials that we may complete are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. Adverse differences between “top-line,”interim, “top-line” or preliminary or interim data and final data could significantly harm our business prospects.

Further, others, including regulatory agencies, may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact the value of the particular program, the approvability or commercialization of the particular product candidate or product and our company in general. In addition, the information we choose to publicly disclose regarding a particular study or clinical trial is based on what is typically extensive information, and you or others may not agree with what we determine is the material or otherwise appropriate information to include in our disclosure. Any information we determine not to disclose may ultimately be deemed significant by you or others with respect to future decisions, conclusions, views, activities or otherwise regarding a particular product candidate or our business. If the top-line,“top-line,” preliminary or interim data that we report differ from final results, or if others, including regulatory authorities, disagree with the conclusions reached, our ability to obtain approval for, and commercialize, product candidates may be harmed, which could significantly harm our business prospects.

Clinical trials of ANX005 in combination with IVIg in patients with GBS will provide no evidence of the efficacy of ANX005.

IVIg, though not FDA-approved in the United States for GBS, is currently the standard of care for GBS. We completed a drug-drug interaction, or DDI, trial evaluating ANX005 co-administered with IVIg to assess safety and tolerability, and to measure the pharmacokinetics and pharmacodynamics of ANX005 when administered in combination with IVIg. Initial results from the DDI study showed the combined use of ANX005 and IVIg in GBS patients was well-tolerated and achieved full target engagement. The DDI trial was not designed or powered for statistical significance on efficacy measures. As a result, the DDI trial provides no evidence of the efficacy of ANX005, which may not be fully understood by investors or market participants, potentially leading to negative effects on our stock price.

Even if our current or future product candidates obtain regulatory approval, they may fail to achieve the broad degree of physician and patient adoption and use necessary for commercial success.

Even if one or more of our product candidates receive FDA or other regulatory approvals, the commercial success of any of our current or future product candidates will depend significantly on the broad adoption and use of the resulting product by physicians and patients for approved indications. Our product candidates may not be commercially successful. For a variety of reasons, including, among other things, competitive factors, pricing or


physician preference, reimbursement by insurers, the degree and rate of physician and patient adoption of our current or future product candidates, if approved, will depend on a number of factors, including:

the clinical indications for which the product is approved and patient demand for approved products that treat those indications;
the safety and efficacy of our product as compared to other available therapies;
the availability of coverage and adequate reimbursement from managed care plans, insurers and other healthcare payors for any of our product candidates that may be approved;
acceptance by physicians, operators of clinics and patients of the product as a safe and effective treatment;
physician and patient willingness to adopt a new therapy over other available therapies to treat approved indications;
overcoming any biases physicians or patients may have toward particular therapies for the treatment of approved indications;
proper training and administration of our product candidates by physicians and medical staff;
public misperception regarding the use of our therapies, if approved for commercial sale;

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patient satisfaction with the results and administration of our product candidates and overall treatment experience, including, for example, the convenience of any dosing regimen;
the cost of treatment with our product candidates in relation to alternative treatments and reimbursement levels, if any, and willingness to pay for the product, if approved, on the part of insurance companies and other third-party payors, physicians and patients;
the revenue and profitability that our products may offer a physician as compared to alternative therapies;
the prevalence and severity of side effects;
limitations or warnings contained in the FDA-approved labeling for our products;
the willingness of physicians, operators of clinics and patients to utilize or adopt our products as a solution;
any FDA requirement to undertake a REMS;
the effectiveness of our sales, marketing and distribution efforts;
adverse publicity about our products or favorable publicity about competitive products; and
potential product liability claims.

the clinical indications for which the product is approved and patient demand for approved products that treat those indications;

the safety and efficacy of our product as compared to other available therapies;

the availability of coverage and adequate reimbursement from managed care plans, insurers and other healthcare payors for any of our product candidates that may be approved;

acceptance by physicians, operators of clinics and patients of the product as a safe and effective treatment;

physician and patient willingness to adopt a new therapy over other available therapies to treat approved indications;

overcoming any biases physicians or patients may have toward particular therapies for the treatment of approved indications;

proper training and administration of our product candidates by physicians and medical staff;

public misperception regarding the use of our therapies, if approved for commercial sale;

patient satisfaction with the results and administration of our product candidates and overall treatment experience, including, for example, the convenience of any dosing regimen;

the cost of treatment with our product candidates in relation to alternative treatments and reimbursement levels, if any, and willingness to pay for the product, if approved, on the part of insurance companies and other third-party payors, physicians and patients;

the revenue and profitability that our products may offer a physician as compared to alternative therapies;

the prevalence and severity of side effects;

limitations or warnings contained in the FDA-approved labeling for our products;

the willingness of physicians, operators of clinics and patients to utilize or adopt our products as a solution;

any FDA requirement to undertake a REMS;

the effectiveness of our sales, marketing and distribution efforts;

adverse publicity about our products or favorable publicity about competitive products; and

potential product liability claims.

We cannot assure you that our current or future product candidates, if approved, will achieve broad market acceptance among physicians and patients. Any failure by our product candidates that obtain regulatory approval to achieve market acceptance or commercial success would adversely affect our results of operations.

We have received Orphan Drug designation for ANX005 for the treatment of GBS and HD, and we may seek Orphan Drug designation for certain future product candidates. We may be unable to obtain such designations or to maintain the benefits associated with Orphan Drug designation, including market exclusivity, which may cause any revenue from product sales to be reduced.

We have received Orphan Drug designation in the United States for ANX005 for the treatment of GBS and HD. Although we may seek Orphan product designation for some or all of our other product candidates, we may never receive such designations. Under the Orphan Drug Act, the FDA may designate a drug or biologic product as an Orphan Drug if it is intended to treat a rare disease or condition, defined as a patient population of fewer than 200,000 in the United States, or a patient population greater than 200,000 in the United States where there is no reasonable expectation that the cost of developing the drug will be recovered from sales in the United States. Orphan Drug designation must be requested before submitting a biologics license application, or BLA, or New Drug Application,new drug application, or NDA. In the EU, the EMA’s Committee for Orphan Medicinal Products, or COMP, grants Orphan Drug designation


to promote the development of products that are intended for the diagnosis, prevention or treatment of a life-threatening or chronically debilitating condition affecting not more than five in 10,000 persons in the EU. Additionally, designation is granted for products intended for the diagnosis, prevention or treatment of a life-threatening, seriously debilitating or serious and chronic condition when, without incentives, it is unlikely that sales of the drug in the EU would be sufficient to justify the necessary investment in developing the drug or biological product or where there is no satisfactory method of diagnosis, prevention or treatment, or, if such a method exists, the medicine must be of significant benefit to those affected by the condition.

In the United States, Orphan Drug designation entitles a party to financial incentives such as opportunities for grant funding towards clinical trial costs, tax advantages and application fee waivers. After the FDA grants Orphan Drug designation, the generic identity of the drug and its potential orphan use are disclosed publicly by the FDA.

In addition, if a product receives the first FDA approval for the indication for which it has orphan designation, the product is entitled to Orphan Drug exclusivity, which means the FDA may not approve any other application to market the same drug for the same disease or condition for a period of seven years, except in limited circumstances, such as a showing of clinical superiority over the product with Orphan exclusivity or where the manufacturer is unable to assure sufficient product quantity the orphan patient population. Exclusive marketing rights in the United States may also be unavailable if we or our collaborators seek approval for an indication broader than the orphan designated indication and may be lost if the FDA later determines that the request for designation was materially defective. In the

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EU, Orphan Drug designation entitles a party to financial incentives such as reduction of fees or fee waivers and ten years of market exclusivity following drug or biological product approval. This period may be reduced to six years if the Orphan Drug designation criteria are no longer met, including where it is shown that the product is sufficiently profitable to not justify maintenance of market exclusivity.

Even if we obtain Orphan Drug designation, we may not be the first to obtain marketing approval for any particular orphan indication due to the uncertainties associated with developing pharmaceutical products. Further, even if we obtain Orphan Drug exclusivity for a product candidate, that exclusivity may not effectively protect the product from competition because different drugs can be approved for the same condition. Even after an Orphan Drug is approved, the FDA can subsequently approve the same drug for the same condition if the FDA concludes that the later drug is clinically superior in that it is safer, more effective or makes a major contribution to patient care. Orphan Drug designation neither shortens the development time or regulatory review time of a drug or biologic nor gives the drug or biologic any advantage in the regulatory review or approval process.

A Breakthrough Therapy designation by the FDA, even if granted for any of our product candidates, may not lead to a faster development or regulatory review or approval process, and it does not increase the likelihood that our product candidates will receive marketing approval.

We may seek a Breakthrough Therapy designation for our product candidates if the clinical data support such a designation for one or more product candidates. A breakthrough therapy is defined as a drug or biologic that is intended, alone or in combination with one or more other drugs or biologics, to treat a serious or life-threatening disease or condition and preliminary clinical evidence indicates that the drug or biologic may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For product candidates that have been designated as breakthrough therapies, interaction and communication between the FDA and the sponsor of the trial can help to identify the most efficient path for clinical development while minimizing the number of patients placed in ineffective control regimens. Drugs and biologics designated as breakthrough therapies by the FDA may also be eligible for priority review and rolling review of BLA or NDA submissions.

Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe one of our product candidates meets the criteria for designation as a breakthrough therapy, the FDA may disagree and instead determine not to make such designation. In any event, the receipt of a Breakthrough Therapy designation for a product candidate may not result in a faster development process, review or approval compared to drugs considered for approval under non-expedited FDA review procedures and 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 no longer meets the conditions for qualification or decide that the time period for FDA review or approval will not be shortened.


A Fast Track designation by the FDA, even if granted for any of our product candidates, may not lead to a faster development or regulatory review or approval process, and does not increase the likelihood that our product candidates will receive marketing approval.

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The FDA has granted Fast Track designation for ANX005 in GBS and for ANX007 in GA, and, in the future, we may seek Fast Track designation for other of our product candidates. If a drug or biologic is intended for the treatment of a serious or life-threatening condition and the drug or biologic demonstrates the potential to address unmet medical needs for this condition, the sponsor may apply for Fast Track designation. The sponsor of a Fast Track product candidate has opportunities for more frequent interactions with the applicable FDA review team during product development and, once a BLA or NDA is submitted, the application may be eligible for priority review. A Fast Track product candidate may also be eligible for rolling review, where the FDA may consider for review sections of the BLA or NDA on a rolling basis before the complete application is submitted, if the sponsor provides a schedule for the submission of the sections of the BLA or NDA, the FDA agrees to accept sections of the BLA or NDA and determines that the schedule is acceptable, and the sponsor pays any required user fees upon submission of the first section of the BLA or NDA. The FDA has broad discretion whether or not to grant this designation. Even if we believe a particular product candidate is eligible for this designation, we cannot assure you that the FDA would decide to grant it. Fast Track designation may not result in a faster development process, review or approval compared to conventional FDA procedures. The FDA may withdraw Fast Track designation if it believes that the designation is no longer supported by data from our clinical development program. Many drugs and biologics that have received Fast Track designation have failed to obtain approval.

Even if we obtain regulatory approval for a product candidate, our products will remain subject to regulatory scrutiny.

If one of our product candidates is approved, it will be subject to ongoing regulatory requirements for manufacturing, labeling, packaging, storage, advertising, promotion, sampling, record-keeping, conduct of post-marketing studies and submission of safety, efficacy and other post-market information, including both federal and state requirements in the United States and requirements of comparable foreign regulatory authorities.

Manufacturers and manufacturers’ facilities are required to comply with extensive FDA and comparable foreign regulatory authority requirements, including ensuring that quality control and manufacturing procedures conform to cGMP regulations. We and our contract manufacturers will be subject to continual review and inspections to assess compliance with cGMPs and adherence to commitments made in any approved marketing application. Accordingly, we and others with whom we work must continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production and quality control.

We will have to comply with requirements concerning advertising and promotion for our products. Promotional communications with respect to prescription drugs and biologics are subject to a variety of legal and regulatory restrictions and must be consistent with the information in the product’s approved label. We may not promote our products “off-label” for indications or uses for which they do not have approval. The holder of an approved application must submit new or supplemental applications and obtain approval for certain changes to the approved product, product labeling or manufacturing process. We could also be asked to conduct post-marketing clinical studies to verify the safety, purity, potency and/or efficacy of our products in general or in specific patient subsets. An unsuccessful post-marketing study or failure to complete such a study could result in the withdrawal of marketing approval.

If a regulatory agency discovers previously unknown problems with a product, such as adverse events of unanticipated severity or frequency, or problems with the facility where the product is manufactured, or disagrees with the promotion, marketing or labeling of a product, the regulatory agency may impose restrictions on that product or us, including requiring withdrawal of the product from the market. If we fail to comply with applicable regulatory requirements, a regulatory agency or enforcement authority may, among other things:

issue warning letters;
impose civil or criminal penalties;
suspend or withdraw regulatory approval;
suspend any of our clinical studies;
refuse to approve pending applications or supplements to approved applications submitted by us;

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impose restrictions on our operations, including closing our contract manufacturers’ facilities; or
seize or detain products, or require a product recall.

issue warning letters;

impose civil or criminal penalties;

suspend or withdraw regulatory approval;

suspend any of our clinical studies;


refuse to approve pending applications or supplements to approved applications submitted by us;

impose restrictions on our operations, including closing our contract manufacturers’ facilities; or

seize or detain products, or require a product recall.

Any government investigation of alleged violations of law could require us to expend significant time and resources in response and could generate negative publicity. Any failure to comply with ongoing regulatory requirements may significantly and adversely affect our ability to commercialize and generate revenue from our products. If regulatory sanctions are applied or if regulatory approval is withdrawn, the value of our company and our operating results of operations will be adversely affected.

Moreover, the policies of the FDA and of other regulatory authorities may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates. We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative or executive action, either in the United States or abroad. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may be subject to enforcement action and we may not achieve or sustain profitability.

Disruptions at the FDA and other government agencies caused by funding shortages or global health concerns could hinder their ability to hire, retain or deploy key leadership and other personnel, or otherwise prevent new or modified products from being developed, approved or commercialized in a timely manner or at all, which could negatively impact our business.

The ability of the FDA to review and/or approve new products can be affected by a variety of factors, including government budget and funding levels, statutory, regulatory, and policy changes, the FDA’s ability to hire and retain key personnel and accept the payment of user fees, and other events that may otherwise affect the FDA’s ability to perform routine functions. Average review times at the FDA have fluctuated in recent years as a result. In addition, government funding of other government agencies that fund research and development activities is subject to the political process, which is inherently fluid and unpredictable. Disruptions at the FDA and other agencies may also slow the time necessary for new drugs and biologics to be reviewed and/or approved by necessary government agencies, which would adversely affect our business. For example, over the last several years, the U.S. government has shut down several times and certain regulatory agencies, such as the FDA, have had to furlough critical FDA employees and stop critical activities.

Separately, in response to the COVID-19 pandemic, on March 10, 2020, the FDA announced its intention to postponepostponed most foreign inspections of manufacturing facilities, and on March 18, 2020, the FDA temporarily postponed routine surveillance inspections of domestic and foreign manufacturing facilities.Subsequently, in July 2020,facilities at various points. Even though the FDA resumed certain on-site inspections of domestic manufacturing facilities subject to a risk-based prioritization system. The FDA utilized this risk-based assessment system to assist in determining when and where it was safest to conduct prioritized domestic inspections. Additionally, on April 15, 2021, the FDA issued a guidance document in which the FDA described its plans to conduct voluntary remote interactive evaluations of certain drug manufacturing facilities and clinical research sites, among other facilities. According to the guidance, the FDA may request such remote interactive evaluations where the FDA determines that remote evaluation would be appropriate based on mission needs and travel limitations. In May 2021, the FDA outlined a detailed plan to move toward a more consistent state of inspectional operations, and in July 2021, the FDAhas since resumed standard inspectionalinspection operations of domestic facilities and was continuing to maintain this level of operation as of September 2021. More recently,where feasible, the FDA has continued to monitor and implement changes to its inspectional activities to ensure the safety of its employees and those of the firms it regulates as it adapts to the evolving COVID-19 pandemic.pandemic, and any resurgence of the virus or emergence of new variants may lead to further inspectional delays. Regulatory authorities outside the United States may adopt similar restrictions or other policy measures in response to the COVID-19 pandemic. If a prolonged government shutdown occurs, or if global health concerns continue to prevent the FDA or other regulatory authorities from conducting their regular inspections, reviews, or other regulatory activities, it could significantly impact the ability of the FDA or other regulatory authorities to timely review and process our regulatory submissions, which could have a material adverse effect on our business.


We conduct, and in the future plan to conduct, clinical trials for product candidates outside the United States, and the FDA and comparable foreign regulatory authorities may not accept data from such trials.

We conduct clinical trials of our product candidates outside the United States, and plan to continue to do so in the future for reasons including the relative impact of the COVID-19 pandemic on U.S. trial sites.sites in the United States. For example, we conducted our Phase 1b GBS clinical trial of ANX005 in Bangladesh.Bangladesh, and are conducting our Phase 3 clinical trial of ANX005 in patients with GBS exclusively at sites outside the United States. The acceptance of study data from clinical trials conducted outside the United States or anotherthe applicable jurisdiction by the FDA anyand comparable foreign regulatory authorityauthorities may be subject to certain conditions, or may not be accepted at all.

For example, where data from foreign clinical trials are intended to serve as the sole basis for marketing approval in the United States, regardless of whether such trials were conducted under an IND, the FDA will not approve the

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application on the basis of foreign data alone unless those data are applicable to the United States population and United States medical practice;practice, the trials were performed by clinical investigators of recognized competence;competence and the data are considered valid without the need for an on-site inspection by the FDA or, if the FDA considers such an inspection to be necessary, the FDA is able to validate the data through an on-site inspection or other appropriate means. For trials that are conducted only at sites outside of the United States and not subject to an IND, the FDA requires the clinical trial to have been conducted in accordance with Good Clinical Practice,good clinical practice, or GCP, requirements, and the FDA must be able to validate the data from the clinical trial through an on-site inspection if it deems such inspection necessary. In addition, foreign trials are subject to the applicable local laws of the foreign jurisdictions where the trials are conducted. There can be no assurance that the FDA or any comparable foreign regulatory authority will accept data from trials conducted outside of the United States or the applicable jurisdiction. If the FDA or any comparable foreign regulatory authority does not accept such data, it would result in the need for additional trials, which would be costly and time-consuming and delay aspects of our business plan, and which may result in product candidates that we may develop not receiving approval or clearance for commercialization in the applicable jurisdiction.

If the product candidates that we develop receive regulatory approval in the United States or another jurisdiction, they may never receive approval in other jurisdictions, which would limit market opportunities for our product candidates and adversely affect our business.

Approval of a product candidate in the United States by the FDA or by the requisite regulatory agencies in any other jurisdiction does not ensure approval of such product candidate by regulatory authorities in other countries or jurisdictions. The approval process varies among countries and may limit our or any future collaborators’ ability to develop, manufacture, promote and sell product candidates internationally. Failure to obtain marketing approval in international jurisdictions would prevent the product candidates from being marketed outside of the jurisdictions in which regulatory approvals have been received. In order to market and sell product candidates in the EU, and many other jurisdictions, we and any future collaborators must obtain separate marketing approvals and comply with numerous and varying regulatory requirements. The approval procedure varies among countries and may involve additional preclinical studies or clinical trials both before and after approval. In many countries, any product candidate for human use must be approved for reimbursement before it can be approved for sale in that country. In some cases, the intended price for such product is also subject to approval. Further, while regulatory approval of a product candidate in one country does not ensure approval in any other country, a failure or delay in obtaining regulatory approval in one country may have a negative effect on the regulatory approval process in others. If we or any future collaborators fail to comply with the regulatory requirements in international markets or to obtain all required marketing approvals, the target market for a particular potential product will be reduced, which would limit our ability to realize the full market potential for the product and adversely affect our business.

Any product candidates for which we intend to seek approval as biologic products may face competition sooner than anticipated.

The Patient Protection and Affordable Care Act, signed into law on March 23, 2010, includes a subtitle called the Biologics Price Competition and Innovation Act of 2009, or the BPCIA, which created an abbreviated approval pathway for biological products that are biosimilar to or interchangeable with an FDA-licensed reference biological product. Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years following the date that the reference product was first licensed by the FDA. In addition, the approval of a biosimilar product may not be made effective by the FDA until 12 years from the date on which the reference product was first licensed. During this 12-year period of exclusivity, another company may still market a competing version of the


reference product if the FDA approves a full BLA for the competing product containing the sponsor’s own pre-clinical data and data from adequate and well-controlled clinical trials to demonstrate the safety, purity and potency of their product.

There is a risk that any of our product candidates approved as a biological product under a BLA would not qualify for the 12-year period of exclusivity or that this exclusivity could be shortened due to congressional action or otherwise, or that the FDA will not consider our product candidates to be reference products for competing products, potentially creating the opportunity for generic competition sooner than anticipated. Other aspects of the BPCIA, some of which may impact the BPCIA exclusivity provisions, have also been the subject of litigation. Moreover, the extent to which a biosimilar, once approved, will be substituted for any one of our reference products in a way that is similar

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to traditional generic substitution for non-biological products is not yet clear, and will depend on a number of marketplace and regulatory factors that are still developing.

We rely on third-party suppliers to manufacture our product candidates, and we intend to rely on third parties to produce commercial supplies of any approved product. The loss of these suppliers, or their failure to comply with applicable regulatory requirements or to provide us with sufficient quantities at acceptable quality levels or prices, or at all, would materially and adversely affect our business.

We do not have northe ability, and we do wenot plan to build or acquire the infrastructure or capability internally, to manufacture supplies of our product candidates or the materials necessary to produce our product candidates for use in the conduct of our preclinical studies or clinical trials, and we lack the internal resources and the capability to manufacture any of our product candidates on a preclinical, clinical or commercial scale. The facilities used by our contract manufacturers to manufacture our product candidates are subject to various regulatory requirements and may be subject to the inspection of the FDA or other regulatory authorities. We do not control the manufacturing processes of, and are completely dependent on, our contract manufacturing partners for compliance with the regulatory requirements, known as cGMPs. If our contract manufacturers cannot successfully manufacture material that conforms to our specifications and the strict regulatory requirements of the FDA or comparable regulatory authorities in foreign jurisdictions, we may not be able to rely on their manufacturing facilities for the manufacture of our product candidates. In addition, we have limited control over the ability of our contract manufacturers to maintain adequate quality control, quality assurance and qualified personnel. If the FDA or a comparable foreign regulatory authority finds these facilities inadequate for the manufacture of our product candidates or if such facilities are subject to enforcement action in the future or are otherwise inadequate, we may need to find alternative manufacturing facilities, which would significantly impact our ability to develop, obtain regulatory approval for or market our product candidates.

We currently intend to supply our product candidates in all territories for our clinical development programs. We currentlyprograms, and rely on third parties at key stages in our supply chain. For instance, the supply chains for our product candidates involve several manufacturers that specialize in specific operations of the manufacturing process, specifically, raw materials manufacturing, drug substance manufacturing and drug product manufacturing. As a result, the supply chain for the manufacturing of our product candidates is complicated, and we expect the logistical challenges associated with our supply chain to grow more complex as our product candidates are further developed.

We do not have any control over the process or timing of the acquisition or manufacture of materials by our manufacturers. We generally do not begin preclinical or clinical trials unless we believe we have access to a sufficient supply of a product candidate to complete such study. In addition, any significant delay in, or quality control problems with respect to, the supply of a product candidate, or the raw material components thereof, for an ongoing study could considerably delay completion of our preclinical or clinical trials, product testing and potential regulatory approval of our product candidates.

We have not yet engaged any manufacturers for the commercial supply of our product candidates. Although we intend to enter into such agreements prior to commercial launch of any of our product candidates, we may be unable to enter into any such agreement or do so on commercially reasonable terms, which could have a material adverse impact upon our business. Moreover, if there is a disruption to one or more of our third-party manufacturers’ or suppliers’ relevant operations, or if we are unable to enter into arrangements for the commercial supply of our product candidates, we will have no other means of producing our product candidates until they restore the affected facilities or we or they procure alternative manufacturing facilities or sources of supply. Our ability to progress our preclinical


and clinical programs could be materially and adversely impacted if any of the third-party suppliers upon which we rely were to experience a significant business challenge, disruption or failure due to issues such as financial difficulties or bankruptcy, issues relating to other customers such as regulatory or quality compliance issues, or other financial, legal, regulatory or reputational issues. Additionally, any damage to or destruction of our third-party manufacturers’ or suppliers’ facilities or equipment may significantly impair our ability to manufacture our product candidates on a timely basis.

In addition, to manufacture our product candidates in the quantities which we believe would be required to meet anticipated market demand, our third-party manufacturers would likely need to increase manufacturing capacity and we may need to secure alternative sources of commercial supply, which could involve significant challenges and may

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require additional regulatory approvals. In addition, the development of commercial-scale manufacturing capabilities may require us and our third-party manufacturers to invest substantial additional funds and hire and retain the technical personnel who have the necessary manufacturing experience. Neither we nor our third-party manufacturers may successfully complete any required increase to existing manufacturing capacity in a timely manner, or at all. If our manufacturers or we are unable to purchase the raw materials necessary for the manufacture of our product candidates on acceptable terms, at sufficient quality levels or in adequate quantities, if at all, the commercial launch of our product candidates 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 candidates, if approved.

We rely on third parties in the conduct of all of our preclinical studies and clinical trials. If these third parties do not successfully carry out their contractual duties, fail to comply with applicable regulatory requirements or meet expected deadlines, we may be unable to obtain regulatory approval for our product candidates.

We currently do not have the ability to independently conduct preclinical studies or clinical trials that comply with the regulatory requirements known as good laboratory practice, or GLP, requirements or GCP requirements, respectively. The FDA and regulatory authorities in other jurisdictions require us to comply with GCP requirements for conducting, monitoring, recording and reporting the results of clinical trials, in order to ensure that the data and results are scientifically credible and accurate and that the trial subjects are adequately informed of the potential risks of participating in clinical trials. We rely on medical institutions, clinical investigators, contract laboratories and other third parties, such as CROs, to conduct GLP-compliant preclinical studies and GCP-compliant clinical trials on our product candidates properly and on time. While we have agreements governing their activities, we control only certain aspects of their activities and have limited influence over their actual performance. The third parties with whom we contract for execution of our GLP-compliant preclinical studies and our GCP-compliant clinical trials play a significant role in the conduct of these studies and the subsequent collection and analysis of data. These third parties are not our employees and, except for restrictions imposed by our contracts with such third parties, we have limited ability to control the amount or timing of resources that they devote to our programs. Although we rely on these third parties to conduct our GLP-compliant preclinical studies and GCP-compliant clinical trials, we remain responsible for ensuring that each of our preclinical studies and clinical trials is conducted in accordance with its investigational plan and protocol and applicable laws and regulations, and our reliance on the CROs does not relieve us of our regulatory responsibilities.

Many of the third parties with whom we contract may also have relationships with other commercial entities, including our competitors, for whom they may also be conducting clinical trials or other drug development activities that could harm our competitive position. If the third parties conducting our preclinical studies or our clinical trials do not adequately perform their contractual duties or obligations, experience significant business challenges, disruptions or failures, do not meet expected deadlines, terminate their agreements with us or need to be replaced, or if the quality or accuracy of the data they obtain is compromised due to their failure to adhere to our protocols or to GLPs or GCPs, or for any other reason, we may need to enter into new arrangements with alternative third parties. This could be difficult, costly or impossible, and our preclinical studies or clinical trials may need to be extended, delayed, terminated or repeated. As a result we may not be able to obtain regulatory approval in a timely fashion, or at all, for the applicable product candidate, our business, financial results and the commercial prospects for our product candidates would be harmed, our costs could increase, and our ability to generate revenues could be delayed.


If we are not successful in identifying, developing and commercializing additional product candidates, our ability to expand our business and achieve our strategic objectives would be impaired.

Although a substantial amount of our effort will focus on the continued development and potential approval of our current product candidates, a key element of our strategy is to identify, develop and commercialize a portfolio of products that address classical complement-mediated autoimmune and neurodegenerative diseases. A component of our strategy is to evaluate our product candidates in multiple indications based, in part, on our evaluation of certain biomarkers in a disease area. For example, we intend to evaluate ANX005 in neurodegenerative diseases, including amyotrophic lateral sclerosis, or ALS, and Huntington’s disease, or HD; however, we are continuing to evaluate ANX005 in these patient populations, and even if we believe we have obtained positive clinical results in patients with one of these neurodegenerative diseases, such results may not be replicated in later studies evaluating ANX005 in patients with the same disease or across other neurodegenerative or autoimmune diseases. Even though we are

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currently developing a pipeline of product candidates, our development efforts may still fail to yield product candidates potentially suitable for commercialization for many reasons, including the following:

competitors may develop alternatives that render our product candidates obsolete;
product candidates we develop may be covered by third parties’ patents or other exclusive rights;
a product candidate may be shown to have harmful side effects or other characteristics that indicate it is unlikely to be effective or otherwise does not meet applicable regulatory criteria;
a product candidate may not be capable of being produced in commercial quantities at an acceptable cost, or at all; and
a product candidate may not be accepted as safe and effective by physicians and patients.

competitors may develop alternatives that render our product candidates obsolete;

product candidates we develop may be covered by third parties’ patents or other exclusive rights;

a product candidate may be shown to have harmful side effects or other characteristics that indicate it is unlikely to be effective or otherwise does not meet applicable regulatory criteria;

a product candidate may not be capable of being produced in commercial quantities at an acceptable cost, or at all; and

a product candidate may not be accepted as safe and effective by physicians and patients.

We therefore cannot provide any assurance that we will be able to successfully identify or acquire additional product candidates, advance any of these additional product candidates through the development process, successfully commercialize any such additional product candidates, if approved, or assemble sufficient resources to identify, acquire, develop or, if approved, commercialize additional product candidates. If we are unable to successfully identify, acquire, develop and commercialize additional product candidates, our commercial opportunities may be limited.

We face significant competition in an environment of rapid technological and scientific change, and our product candidates, if approved, will face significant competition, which may prevent us from achieving significant market penetration. Most of our competitors have significantly greater resources than we do, and we may not be able to successfully compete.

The pharmaceutical, biopharmaceutical and biotechnology industries in particular are characterized by rapidly advancing technologies, intense competition and a strong emphasis on developing proprietary therapeutics. Numerous companies are engaged in the development, patenting, manufacturing and marketing of healthcare products competitive with those that we are developing. We face competition from a number of sources, such as pharmaceutical, biopharmaceutical and biotechnology companies, generic drug companies and academic and research institutions, many of which have greater financial resources, marketing capabilities, sales forces, manufacturing capabilities, research and development capabilities, clinical trial expertise, intellectual property portfolios, experience in obtaining patents and regulatory approvals for product candidates and other resources than we do. Some of the companies also have a broad range of other product offerings, large direct sales forces and long-term customer relationships with our target physicians, which could inhibit our market penetration efforts. Mergers and acquisitions in the pharmaceutical, biopharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These competitors also compete with us in recruiting and retaining qualified scientific and management personnel and establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

Certain alternative treatments offered by competitors may be available at lower prices and may offer greater efficacy or better safety profiles. Furthermore, currently approved products could be discovered to have application


for the intended indication of our product candidates, which could give such products significant regulatory and market timing advantages over any of our product candidates. Our competitors also may obtain FDA, European Medicines Agency, or EMA, or other regulatory approval for their products more rapidly than we may obtain approval for ours and may obtain orphan product exclusivity from the FDA for indications our product candidates are targeting, which could result in our competitors establishing a strong market position before we are able to enter the market. For additional information regarding our competition, see the section captioned “Business—Competition” in this report.Annual Report on Form 10-K.

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The successful commercialization of our product candidates will depend in part on the extent to which governmental authorities and health insurers establish adequate coverage, reimbursement levels and pricing policies. Failure to obtain or maintain coverage and adequate reimbursement for our product candidates, if approved, could limit our ability to market those products and decrease our ability to generate revenue.

The availability and adequacy of coverage and reimbursement by governmental healthcare programs such as Medicare and Medicaid, private health insurers and other third-party payors are essential for most patients to be able to afford prescription medications such as our product candidates, if approved. Our ability to achieve acceptable levels of coverage and reimbursement for products by governmental authorities, private health insurers and other organizations will have an effect on our ability to successfully commercialize our product candidates. Obtaining coverage and adequate reimbursement for our products may be particularly difficult because of the higher prices often associated with drugs administered under the supervision of a physician. Even if we obtain coverage for our product candidates by a third-party payor, the resulting reimbursement payment rates may not be adequate or may require co-payments that patients find unacceptably high. For products administered under the supervision of a physician, obtaining coverage and adequate reimbursement may be particularly difficult because of the higher prices often associated with such drugs. Additionally, separate reimbursement for the product itself or the treatment or procedure in which the product is used may not be available, which may impact physician utilization. We cannot be sure that coverage and reimbursement in the United States, the EU or elsewhere will be available for our product candidates or any product that we may develop, and any reimbursement that may become available may be decreased or eliminated in the future.

Third-party payors increasingly are challenging prices charged for pharmaceutical, biopharmaceutical and biotechnology products and services, and many third-party payors may refuse to provide coverage and reimbursement for particular drugs or biologics when an equivalent generic drug, biosimilar or a less expensive therapy is available. It is possible that a third-party payor may consider our product candidates as substitutable and only offer to reimburse patients for the cost of the less expensive product. Even if we show improved efficacy or improved convenience of administration with our product candidates, pricing of existing third-party therapeutics may limit the amounts we will be able to charge for our product candidates. These payors may deny or revoke the reimbursement status of a given product or establish prices for new or existing marketed products at levels that are too low to enable us to realize an appropriate return on our investment in our product candidates. If reimbursement is not available or is available only at limited levels, we may not be able to successfully commercialize our product candidates and may not be able to obtain a satisfactory financial return on our investment in the development of product candidates.

There is significant uncertainty related to the insurance coverage and reimbursement of newly-approvednewly approved products. In the United States, third-party payors, including private and governmental payors, such as the Medicare and Medicaid programs, play an important role in determining the extent to which new drugs and biologics will be covered. The Medicare and Medicaid programs increasingly are used as models in the United States for how private payors and other governmental payors develop their coverage and reimbursement policies for drugs and biologics. Some third-party payors may require pre-approval of coverage for new or innovative devices or drug therapies before they will reimburse healthcare providers who use such therapies. We cannot predict at this time what third-party payors will decide with respect to the coverage and reimbursement for our product candidates.

No uniform policy for coverage and reimbursement for products exists among third-party payors in the United States. Therefore, coverage and reimbursement for products can differ significantly from payor to payor. As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide scientific and clinical support for the use of our product candidates to each payor separately, with no assurance that coverage and adequate reimbursement will be applied consistently or obtained in the first instance. Furthermore, rules and regulations regarding reimbursement change frequently, in some cases on short notice, and we believe that changes in these rules and regulations are likely.


Outside the United States, international operations are generally subject to extensive governmental price controls and other market regulations, and we believe the increasing emphasis on cost-containment initiatives in Europe and other foreign jurisdictions have and will continue to put pressure on the pricing and usage of our product candidates. In many countries, the prices of medical products are subject to varying price control mechanisms as part of national health systems. Other countries allow companies to fix their own prices for medical products but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the

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amounts that we are able to charge for our product candidates. Accordingly, in markets outside the United States, the reimbursement for our product candidates may be reduced compared with the United States and may be insufficient to generate commercially-reasonablecommercially reasonable revenue and profits.

Moreover, increasing efforts by governmental and third-party payors in the United States and abroad to cap or reduce healthcare costs may cause such organizations to limit both coverage and the level of reimbursement for newly approved products, and, as a result, they may not cover or provide adequate payment for our product candidates. We expect to experience pricing pressures in connection with the sale of our product candidates due to the trend toward managed health care, the increasing influence of health maintenance organizations and additional legislative changes. The downward pressure on healthcare costs in general, particularly prescription drugs and biologics and surgical procedures and other treatments, has become intense. As a result, increasingly high barriers are being erected to the entry of new products.

We currently have no sales organization. If we are unable to establish sales capabilities on our own or through third parties, we may not be able to market and sell our product candidates, if approved, effectively in the United States and foreign jurisdictions or generate product revenue.

We currently do not have a marketing or sales organization. In order to commercialize our product candidates in the United States and foreign jurisdictions, we must build our marketing, sales, distribution, managerial and other non-technical capabilities or make arrangements with third parties to perform these services, and we may not be successful in doing so. If any of our product candidates receive regulatory approval, we expect to establish a sales organization with technical expertise and supporting distribution capabilities to commercialize each such product candidate, which will be expensive and time consuming. We have no prior experience in the marketing, sale and distribution of pharmaceutical, biopharmaceutical and biotechnology products, and there are significant risks involved in building and managing a sales organization, including our ability to hire, retain and incentivize qualified individuals, generate sufficient sales leads, provide adequate training to sales and marketing personnel and effectively manage a geographically dispersed sales and marketing team. Any failure or delay in the development of our internal sales, marketing and distribution capabilities would adversely impact the commercialization of these products. We may choose to collaborate with third parties that have direct sales forces and established distribution systems, either to augment our own sales force and distribution systems or in lieu of our own sales force and distribution systems. If we are unable to enter into such arrangements on acceptable terms or at all, we may not be able to successfully commercialize our product candidates. If we are not successful in commercializing our product candidates or any future product candidates, either on our own or through arrangements with one or more third parties, we may not be able to generate any future product revenue and we would incur significant additional losses.

We will need to increase the size of our organization, and we may experience difficulties in managing growth.

As of December 31, 2021,2022, we had 6180 full-time employees. We will need to continue to expand our managerial, operational, finance and other resources in order to manage our operations and clinical trials, continue our development activities and commercialize our product candidates or any future product candidates. Our management and personnel, systems and facilities currently in place may not be adequate to support this future growth. Our need to effectively execute our growth strategy requires that we:

manage our clinical trials effectively;
identify, recruit, retain, incentivize and integrate additional employees, including sales personnel;
manage our internal development and operational efforts effectively while carrying out our contractual obligations to third parties; and
continue to improve our operational, financial and management controls, reports systems and procedures.

manage our clinical trials effectively;

identify, recruit, retain, incentivize and integrate additional employees, including sales personnel;

manage our internal development and operational efforts effectively while carrying out our contractual obligations to third parties; and


continue to improve our operational, financial and management controls, reports systems and procedures.

If we fail to attract and retain senior management and key scientific personnel, our business may be materially and adversely affected.

Our success depends in part on our continued ability to attract, retain and motivate highly qualified management and clinical and scientific personnel. We are highly dependent upon members of our senior management, as well as

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our senior scientists. The loss of services of any of these individuals could delay or prevent the successful development of our product pipeline, initiation or completion of our planned clinical trials or the commercialization of our product candidates or any future product candidates.

In February 2022, Sanjay Keswani, MBBS, FRCP, our Executive Vice President and Chief Medical Officer, resigned in order to tend to personal obligations in the United Kingdom. AlthoughFor example, we are engaged in a search for a new chief medical officer, and we may experience difficulties or delays in identifying a qualified replacement. We cannot guarantee that we will not face similar turnover in the future. Management transition is often difficult. Our ability to execute our business strategies may be adversely affected by the uncertainty associated with any transition and the time and management attention needed to fill any vacant role could disrupt our business.

Competition for qualified personnel in the pharmaceutical, biopharmaceutical and biotechnology field is intense due to the limited number of individuals who possess the skills and experience required by our industry. We will need to hire additional personnel as we expand our clinical development and if we initiate commercial activities. We may not be able to attract and retain quality personnel on acceptable terms, or at all. In addition, to the extent we hire personnel from competitors, we may be subject to allegations that they have been improperly solicited or that they have divulged proprietary or other confidential information, or that their former employers own their research output.

If product liability lawsuits are brought against us, we may incur substantial liabilities and may be required to limit commercialization of our current or future product candidates.

We face an inherent risk of product liability as a result of the clinical testing of our product candidates and will face an even greater risk if we commercialize any products. For example, we may be sued if any product we develop allegedly causes injury or is found to be otherwise unsuitable during product testing, manufacturing, marketing or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability and breach of warranty. Claims could also be asserted under state consumer protection acts. If we cannot successfully defend ourselves against product liability claims, we may incur substantial liabilities or be required to limit commercialization of our product candidates. Even a successful defense would require significant financial and management resources. Regardless of the merits or eventual outcome, liability claims may result in:

decreased demand for our current or future product candidates;
injury to our reputation;
withdrawal of clinical trial participants;
costs to defend the related litigation;
diversion of management’s time and our resources;
substantial monetary awards to trial participants or patients;
regulatory investigations, product recalls, withdrawals or labeling, marketing or promotional restrictions;
loss of revenue; and
the inability to commercialize our current or any future product candidates.

decreased demand for our current or future product candidates;

injury to our reputation;

withdrawal of clinical trial participants;

costs to defend the related litigation;

diversion of management’s time and our resources;

substantial monetary awards to trial participants or patients;

regulatory investigations, product recalls, withdrawals or labeling, marketing or promotional restrictions;

loss of revenue; and

the inability to commercialize our current or any future product candidates.

If we are unable to obtain and maintain sufficient product liability insurance at an acceptable cost and scope of coverage to protect against potential product liability claims, the commercialization of our current or any future product candidates we develop could be inhibited or prevented. We currently carry product liability insurance covering


our clinical trials. Although we maintain such insurance, any claim that may be brought against us could result in a court judgment or settlement in an amount that is not covered, in whole or in part, by our insurance or that is in excess of the limits of our insurance coverage. Our insurance policies also have various exclusions and deductibles, and we may be subject to a product liability claim for which we have no coverage. We will have to pay any amounts awarded by a court or negotiated in a settlement that exceed our coverage limitations or that are not covered by our insurance, and we may not have, or be able to obtain, sufficient funds to pay such amounts. Moreover, in the future, we may not be able to maintain insurance coverage at a reasonable cost or in sufficient amounts to protect us against losses. If and when we obtain approval for marketing any of our product candidates, we intend to expand our insurance coverage to

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include the sale of such product candidate; however, we may be unable to obtain this liability insurance on commercially reasonable terms or at all.

Any collaboration arrangements that we may enter into in the future may not be successful, which could adversely affect our ability to develop and commercialize our product candidates.

While we have not entered into any collaboration agreements to date, we may seek collaboration arrangements for the commercialization, or potentially for the development, of certain of our product candidates depending on the merits of retaining commercialization rights for ourselves as compared to entering into collaboration arrangements. For example, certain of the disease areas that we believe our product candidates address, including, among others, ophthalmic indications, require large, costly and later-stage clinical trials, which a collaboration partner may be better positioned to finance and/or conduct. In addition, a component of our strategy is to maximize the commercial value of our current and future product candidates, which may also strategically align with partnering commercial rights with partners that have larger and established sales organizations. To the extent that we decide to enter into collaboration agreements, we may face significant competition for appropriate collaborators. Moreover, collaboration arrangements are complex and time-consuming to negotiate, document, implement and maintain and challenging to manage. We may not be successful in our efforts to enter into collaboration agreements. The terms of collaborations or other arrangements that we may establish may not be favorable to us.

The success of our collaboration arrangements will depend heavily on the efforts and activities of our collaborators. Collaborations are subject to numerous risks, which may include risks that:

collaborators have significant discretion in determining the efforts and resources that they will apply to collaborations;
collaborators may not pursue development and commercialization of our product candidates or may elect not to continue or renew development or commercialization programs based on clinical trial results, changes in their strategic focus due to their acquisition of competitive products or their internal development of competitive products, availability of funding or other external factors, such as a business combination that diverts resources or creates competing priorities;
collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial, abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a product candidate for clinical testing;
collaborators could independently develop, or develop with third parties, products that compete directly or indirectly with our products or product candidates;
collaborators with marketing, manufacturing and distribution rights to one or more products may not commit sufficient resources to or otherwise not perform satisfactorily in carrying out these activities;
we could grant exclusive rights to our collaborators that would prevent us from collaborating with others;
collaborators may not properly maintain or defend our intellectual property rights or may use our intellectual property or proprietary information in a way that gives rise to actual or threatened litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential liability;
disputes may arise between us and collaborators that cause the delay or termination of the research, development or commercialization of our current or future product candidates or that result in costly litigation or arbitration that diverts management attention and resources;
collaborations may be terminated, and, if terminated, this may result in a need for additional capital to pursue further development or commercialization of the applicable current or future product candidates;
collaborators may own or co-own intellectual property covering products that result from our collaborating with them, and in such cases, we would not have the exclusive right to develop or commercialize such intellectual property;

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disputes may arise with respect to the ownership of any intellectual property developed pursuant to our collaborations; and
collaborators’ sales and marketing activities or other operations may not be in compliance with applicable laws resulting in civil or criminal proceedings.

collaborators have significant discretion in determining the efforts and resources that they will apply to collaborations;

collaborators may not pursue development and commercialization of our product candidates or may elect not to continue or renew development or commercialization programs based on clinical trial results, changes in their strategic focus due to their acquisition of competitive products or their internal development of competitive products, availability of funding or other external factors, such as a business combination that diverts resources or creates competing priorities;

collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial, abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a product candidate for clinical testing;

collaborators could independently develop, or develop with third parties, products that compete directly or indirectly with our products or product candidates;

collaborators with marketing, manufacturing and distribution rights to one or more products may not commit sufficient resources to or otherwise not perform satisfactorily in carrying out these activities;

we could grant exclusive rights to our collaborators that would prevent us from collaborating with others;

collaborators may not properly maintain or defend our intellectual property rights or may use our intellectual property or proprietary information in a way that gives rise to actual or threatened litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential liability;

disputes may arise between us and collaborators that cause the delay or termination of the research, development or commercialization of our current or future product candidates or that result in costly litigation or arbitration that diverts management attention and resources;


collaborations may be terminated, and, if terminated, this may result in a need for additional capital to pursue further development or commercialization of the applicable current or future product candidates;

collaborators may own or co-own intellectual property covering products that result from our collaborating with them, and in such cases, we would not have the exclusive right to develop or commercialize such intellectual property;

disputes may arise with respect to the ownership of any intellectual property developed pursuant to our collaborations; and

collaborators’ sales and marketing activities or other operations may not be in compliance with applicable laws resulting in civil or criminal proceedings.

Unfavorable global economicand macroeconomic or political conditions could adversely affect our business, financial condition or results of operations.

Our business is susceptible to general conditions in the global economy and in the global financial markets. A globalGlobal financial crisis or acrises and global or regional political disruptiondisruptions have caused, and could in the future cause, extreme volatility in the capital and credit markets. A severe or prolonged economic downturn, including a recession or depression resulting from , the current COVID-19 pandemic,inflationary economic environment, rising interest rates, debt and equity market fluctuations, diminished liquidity and credit availability, increased unemployment rates, decreased investor and consumer confidence, supply chain challenges, natural catastrophes, the effects of climate change, regional and global conflicts and terrorist attacks or political disruption or turmoil could result in a variety of risks to our business, including weakened demand for our product candidates or any future product candidates, if approved, and our ability to raise additional capital when needed on acceptable terms, if at all. A weak or declining economy or political disruption could also strain our manufacturers or suppliers, possibly resulting in supply disruption, or cause our customers to delay making payments for our potential products. Any of the foregoing could materially and adversely affect our business, financial condition, results of operations and prospects, and we cannot anticipate all of the ways in which the political or economic climate and financial market conditions could adversely impact our business.

We or the third parties upon whom we depend on may be adversely affected by earthquakes or other natural disasters, and our business continuity and disaster recovery plans may not adequately protect us from a serious disaster.

Our corporate headquarters and other facilities are located in the San Francisco Bay Area, which has experienced both severe earthquakes and the effects of wildfires. We do not carry earthquake insurance. Earthquakes, wildfires or other natural disasters could severely disrupt our operations, and could materially and adversely affect our business, financial condition, results of operations and prospects.

If a natural disaster, power outage or other event occurred that prevented us from using all or a significant portion of our headquarters, that damaged critical infrastructure or that otherwise disrupted operations, it may be difficult or, in certain cases, impossible, for us to continue our business for a substantial period of time. The disaster recovery and business continuity plans we have in place currently are limited and are unlikely to prove adequate in the event of a serious disaster or similar event. We may incur substantial expenses as a result of the limited nature of our disaster recovery and business continuity plans, which, particularly when taken together with our lack of earthquake insurance, could have a material adverse effect on our business.

Furthermore, integral parties in our supply chain are similarly vulnerable to natural disasters or other sudden, unforeseen and severe adverse events. If such an event were to affect our supply chain, it could have a material adverse effect on our business.

Our employees and independent contractors, including principal investigators, consultants, any future commercial collaborators, service providers and other vendors, may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements, which could have an adverse effect on our results of operations.

We are exposed to the risk that our employees and independent contractors, including principal investigators, consultants, any future commercial collaborators, service providers and other vendors may engage in misconduct or other illegal activity. Misconduct by these parties could include intentional, reckless and/or negligent conduct or other unauthorized activities that violate the laws and regulations of the FDA and other similar regulatory bodies, including those laws that require the reporting of true, complete and accurate information to such regulatory bodies;


manufacturing standards; U.S. federal and state healthcare fraud and abuse, data privacy laws and other similar non-U.S. laws; or laws that require the true, complete and accurate reporting of financial information or data. Activities

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subject to these laws also involve the improper use or misrepresentation of information obtained in the course of clinical trials, the creation of fraudulent data in our preclinical studies or clinical trials, or illegal misappropriation of product, which could result in regulatory sanctions and cause serious harm to our reputation. It is not always possible to identify and deter misconduct by employees and other third parties, 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 comply with such laws or regulations. In addition, we are subject to the risk that a person or government could allege such fraud or other misconduct, even if none occurred. 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 financial results, including, without limitation, the imposition of significant civil, criminal and administrative penalties, damages, monetary fines, disgorgements, possible exclusion from participation in Medicare, Medicaid and other U.S. healthcare programs, other sanctions, imprisonment, contractual damages, reputational harm, diminished profits and future earnings and curtailment of our operations, any of which could adversely affect our ability to operate our business and our results of operations.

Our business involves the use of hazardous materials, and we and our third-party manufacturers and suppliers must comply with environmental laws and regulations, which can be expensive and restrict how we do business.

Our research and development activities and our third-party manufacturers’ and suppliers’ activities involve the controlled storage, use and disposal of hazardous materials owned by us, including the components of our product candidates and other hazardous compounds. We and any third-party manufacturers and suppliers are subject to numerous federal, state and local environmental, health and safety laws, regulations and permitting requirements, including those governing laboratory procedures; the generation, handling, use, storage, treatment and disposal of hazardous and regulated materials and wastes; the emission and discharge of hazardous materials into the ground, air and water; and employee health and safety. Our operations involve the use of hazardous and flammable materials, including chemicals and biological and radioactive materials. Our operations also produce hazardous waste. In some cases, these hazardous materials and various wastes resulting from their use are stored at our and our manufacturers’ facilities pending their use and disposal. We generally contract with third parties for the disposal of these materials and wastes. We cannot eliminate the risk of contamination, which could cause an interruption of our commercialization efforts, research and development efforts and business operations, and environmental damage resulting in costly clean-up and liabilities under applicable laws and regulations governing the use, storage, handling and disposal of these materials and specified waste products.

We cannot guarantee that the safety procedures utilized by our third-party manufacturers for handling and disposing of these materials comply with the standards prescribed by these laws and regulations, nor can we eliminate the risk of accidental contamination or injury from these materials. Under certain environmental laws, we could be held responsible for costs relating to any contamination at our current or past facilities and at third-party facilities. In such an event, we may be held liable for any resulting damages and such liability could exceed our resources, and state or federal or other applicable authorities may curtail our use of certain materials and/or interrupt our business operations. Furthermore, environmental laws and regulations are complex, change frequently and have tended to become more stringent. We cannot predict the impact of such changes and cannot be certain of our future compliance.

Compliance with applicable environmental laws and regulations may be expensive, and current or future environmental laws and regulations may impair our research, product development and manufacturing efforts. In addition, we cannot entirely eliminate the risk of accidental injury or contamination from hazardous materials or wastes. 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 carry specific biological or hazardous waste insurance coverage, and our property, casualty and general liability insurance policies specifically exclude coverage for damages and fines arising from biological or hazardous waste exposure or contamination. Accordingly, in the event of contamination or injury, we could be held liable for damages or be penalized with fines in an amount exceeding our resources, and our clinical trials or regulatory approvals could be suspended, which could have a material adverse effect on our business, results of operations and financial condition.


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Risks Related to Intellectual Property

Our current and any future product candidates or products could be alleged to infringe patent rights and other proprietary rights of third parties, which may require costly litigation and, if we are not successful, could cause us to pay substantial damages and/or limit our ability to commercialize our products.

Our commercial success depends on our ability to develop, manufacture and market our current and any future product candidates that may be approved for sale, and to use our proprietary technology without infringing the patents and other proprietary rights of third parties. Intellectual property disputes can be costly to defend and may cause our business, operating results of operations and financial condition to suffer. We operate in an industry with extensive intellectual property litigation. As the pharmaceutical, biopharmaceutical and biotechnology industries expand and more patents are issued, the risk increases that there may be patents issued to third parties that relate to our products and technology of which we are not aware or that we may need to challenge to continue our operations as currently contemplated.

Whether merited or not, we may face allegations that we have infringed the trademarks, copyrights, patents and other intellectual property rights of third parties, including patents held by our competitors or by non-practicing entities. We may also face allegations that our employees have misappropriated the intellectual property rights of their former employers or other third parties. Litigation may make it necessary to defend ourselves by determining the scope, enforceability and validity of third-party proprietary rights, or to establish our proprietary rights. Regardless of whether claims that we are infringing patents or other intellectual property rights have merit, such litigation can be time consuming, divert management attention and financial resources and are costly to evaluate and defend. There can be no assurance with respect to the outcome of any current or future litigation brought by or against us, and the outcome of any such litigation could have a material adverse impact on our business, operating results of operations and financial condition. Litigation is inherently unpredictable, and outcomes are uncertain. Further, as the costs and outcome of such litigation can vary significantly, it is difficult to estimate potential losses that may occur. As a result of such litigation, we may be required to stop treating certain conditions, obtain licenses or modify our products and features while we develop non-infringing substitutes, or may result in significant settlement costs or royalty obligations. For example, litigation can involve substantial damages for infringement, and if the court finds that the infringement was willful, we could be ordered to pay treble damages and the patent owner’s attorneys’ fees. We may also be prohibited from selling or licensing our products unless the third-party licenses rights to us, which it is not required to do at a commercially reasonable price or at all. If a license is available from a third party, we may have to pay substantial royalties or upfront fees or grant cross-licenses to intellectual property rights for our products. We may also have to redesign our products so they do not infringe third-party intellectual property rights, which may not be possible or may require substantial monetary expenditures and time, during which our products may not be available for manufacture, use or sale. Accordingly, we are unable at this time to estimate the effects of these potential future lawsuits on our financial condition, operations or cash flows.

Additionally, some of our competitors may be able to sustain the costs of complex patent litigation more effectively than we can. 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 material adverse effect on the price of our common stock. Any uncertainties resulting from the initiation and continuation of any litigation could have a material adverse effect on our ability to raise the funds necessary to continue our operations.

Although we have reviewed certain third-party patents and patent filings that we believe may be relevant to our product candidates, we have not conducted a comprehensive freedom-to-operate search or analysis for any of our product candidates, and we may not be aware of patents or pending or future patent applications that, if issued, would block us from commercializing our product candidates. Additionally, the scope of a patent claim is determined by an interpretation of the law, the written disclosure in a patent and the patent’s prosecution history. Our interpretation of the relevance or the scope of a patent or a pending application may be incorrect, which may negatively impact our ability to commercialize our product candidates. Thus, we cannot guarantee that our activities related to their product candidates, or our commercialization, do not and will not infringe any third party’s intellectual property.

In addition, patent applications in the United States and many other jurisdictions are typically not published until 18 months after the filing of certain priority documents (or, in some cases, are not published until they issue as


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patents), and publications in the scientific literature often lag behind actual discoveries. Therefore, we cannot be certain that others have not filed patent applications or made public disclosures relating to our technology or our contemplated technology. A third party may have already filed, and may in the future file, patent applications covering our product candidates or technology similar to ours. Any such patent application may have priority over our patent applications or patents, which could further require us to obtain rights to issued patents covering such technologies. If another party has filed a U.S. patent application on inventions similar to ours, depending on whether the timing of the filing date falls under certain patent laws, we may have to participate in a priority contest (such as an interference proceeding) declared by the United States Patent and Trademark Office, or the USPTO, to determine priority of invention in the United States. The costs of patent litigation and other proceedings related to the protection of our global patent position could be substantial, and it is possible that such efforts would be unsuccessful, resulting in a loss of our patent position with respect to such invention.

If we are unable to obtain, maintain and enforce intellectual property protection directed to our current and any future technologies that we develop, others may be able to make, use or sell products substantially the same as ours, which could adversely affect our ability to compete in the market.

The market for pharmaceuticals and biopharmaceuticals is highly competitive and subject to rapid technological change. Our success depends, in part, upon our ability to maintain a competitive position in the development and protection of technologies and any future products for use in these fields and upon our ability to obtain, maintain and enforce our intellectual property rights. We seek to obtain and maintain patents and other intellectual property rights to restrict the ability of others to market products that misappropriate our technology and/or infringe our intellectual property to unfairly and illegally compete with any future products. If we are unable to protect our intellectual property and proprietary rights, including due to the impact of the COVID-19 pandemic on our business operations, our competitive position and our business could be harmed, as third parties may be able to make, use or sell products that are substantially the same as any future products we may sell without incurring the sizeable development and licensing costs that we have incurred, which would adversely affect our ability to compete in the market.

We use a combination of patents, trademarks, know-how, confidentiality procedures and contractual provisions to protect our proprietary technology. However, these protections may not be adequate and may not provide us with any competitive advantage. For example, patents may not issue from any of our currently pending or any future patent applications, and our issued patents and any future patents that may issue may not survive legal challenges to their scope, validity or enforceability, or provide significant protection for us.

We have not pursued or maintained, and may not pursue or maintain in the future, patent protection for our product candidates in every country or territory in which we may sell our products. In addition, we cannot be sure that any of our pending patent applications or pending trademark applications will issue or that, if issued, they will issue in a form that will provide adequate protection for our products. The U.S. Patent and Trademark Office, or USPTO, patent offices in other jurisdictions, or judicial or other bodies in any jurisdiction may deny or significantly narrow claims made under our patent applications, and claims in our issued patents may be invalidated, may be designed around or may otherwise be unable to provide us with protection for our products. Further, the USPTO, trademark offices in other jurisdictions, or judicial or other bodies in any jurisdiction may deny our trademark applications and, even if published or registered, these trademarks may not effectively protect our brand and goodwill. Like patents, trademarks also may be successfully opposed or challenged.

We cannot be certain that the steps we have taken will prevent unauthorized use or unauthorized reverse engineering of our technology that is material to our business. Moreover, third parties may independently develop technologies that are competitive with ours and such competitive technologies may or may not infringe our intellectual property. The enforcement of our intellectual property rights also depends on the success of any legal actions we may take against these third parties in the respective country or forum, but these actions may not be successful. As with all granted intellectual property, such intellectual property may be challenged, invalidated or circumvented, may not provide protection and/or may not prove to be enforceable in actions against specific alleged infringers.

If we or any future collaborators we may have were to initiate legal proceedings against a third party to enforce a patent covering one of our product candidates or future product candidates, the defendant could counterclaim that our patent is invalid and/or unenforceable. In patent litigation in the United States, defendant counterclaims alleging invalidity and/or unenforceability are commonplace. Grounds for a validity challenge could be an alleged failure to


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meet any of several statutory requirements, including obviousness or lack of novelty, enablement or written description. Grounds for an unenforceability assertion could be an allegation that someone connected with prosecution of the patent withheld relevant information from the USPTO, or made a misleading statement, during prosecution. Third parties may also raise similar claims before the USPTO even outside the context of litigation. The outcome following legal assertions of invalidity and unenforceability is unpredictable. With respect to validity, for example, we cannot be certain that there is no invalidating prior art of which we and the patent examiner were unaware during prosecution, or that a defendant would not prevail on an assertion of invalidity based on prior art that we were aware of during prosecution. If a defendant were to prevail on a legal assertion of invalidity and/or unenforceability, we would lose at least part, and perhaps all, of the patent protection on our product candidates. Such a loss of patent protection would have a material adverse impact on our business.

Even if claims in our patents survive assertions of invalidity and unenforceability, they may not be broad enough to prevent others from marketing products similar to ours or designing around our patents. For example, third parties may be able to make products that are similar to ours but that are not covered by the claims of our patents. The claims of our issued patents or patent applications when issued may not cover our product candidates or any future products that we develop.

Patent law can be highly uncertain and involve complex legal and factual questions for which important principles remain unresolved. In the United States and in many other jurisdictions, policies regarding the breadth of claims allowed in patents can be inconsistent. The U.S. Supreme Court and the Court of Appeals for the Federal Circuit have made, and will likely continue to make, changes in how the patent laws of the United States are interpreted. Similarly, courts in other jurisdictions have made, and will likely continue to make, changes in how the patent laws in their respective jurisdictions are interpreted. We cannot predict future changes in the interpretation of patent laws or changes to patent laws that might be enacted into law by U.S. and international legislative bodies. Those changes may materially affect the patents and patent applications of our licensors, our existing or future patents and patent applications and our ability to obtain additional patents in the future.

Patent reform legislation in the United States could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents. For example, on September 16, 2011, the Leahy-Smith America Invents Act, or Leahy-Smith Act, was signed into law. The Leahy-Smith Act included a number of significant changes to U.S. patent law. These include provisions that affect the way patent applications are prosecuted, redefine prior art, may affect patent litigation and switch the U.S. patent system from a “first-to-invent” system to a “first-to-file” system. Under a “first-to-file” system, assuming the other requirements for patentability are met, the first inventor to file a patent application generally will be entitled to the patent on an invention regardless of whether another inventor had made the invention earlier. The USPTO has developed 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. 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, which could have a material adverse effect on our business and financial condition. Any future changes in the patent laws of the United States, or even the possibility of such changes, may further increase these uncertainties and costs.

The USPTO and various patent agencies in other jurisdictions require compliance with a number of procedural, documentary, fee, annuity payment and other provisions to maintain patent applications and issued patents. Although an inadvertent lapse, including due to the effect of the COVID-19 pandemic on us or our patent maintenance vendors, can in many cases be cured by payment of a late fee or by other means in accordance with the applicable rules, there are situations in which noncompliance with these requirements can result in abandonment or lapse of a patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction.

In addition, we have a number of patents and patent applications outside of the United States and expect to continue to pursue patent protection in many of the significant markets in which we intend to do business. The laws of some international jurisdictions do not protect intellectual property rights to the same extent as laws in the United States, and many companies have encountered significant difficulties in obtaining, protecting and defending such rights in certain jurisdictions outside of the United States. If we encounter such difficulties or we are otherwise precluded from effectively protecting our intellectual property rights in international jurisdictions, our business, financial condition, results of operations and prospects could be materially and adversely affected. Earlier patent


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filings in certain international countries may also permit third parties to allege priority to certain technology in those countries.

Patent terms may be shortened or lengthened in certain jurisdictions by, for example, terminal disclaimers, patent term adjustments, supplemental protection certificates and patent term extensions. Patent term extensions and supplemental protection certificates, and the like, may be impacted by the regulatory process and may not significantly lengthen patent term. Non-payment or delay in payment of patent extension filing (including any patent term extension or adjustment filing) fees, whether intentional or unintentional, may also result in the loss of patent rights important to our business. Certain countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to other parties. In addition, many countries limit the enforceability of patents against other parties, including government agencies or government contractors. In these countries, the patent owner may have limited remedies, which could materially diminish the value of any patents.

Monitoring unauthorized use of our intellectual property is difficult and costly. From time to time, we review our competitors’ products, and may in the future seek to enforce our patents or other rights against potential infringement. However, the steps we have taken to protect our proprietary rights may not be adequate to prevent misappropriation of our intellectual property. We may not be able to detect unauthorized use of, or take appropriate steps to enforce, our intellectual property rights. Our competitors may also independently develop similar technology. Any inability to meaningfully protect our intellectual property could result in competitors offering products competitive to our products. In addition, we may need to defend our patents from third-party challenges, such as interferences, derivation proceedings, re-examination proceedings, post-grant review, inter partes review, third-party submissions, oppositions, nullity actions or other patent proceedings. We may need to initiate infringement claims or litigation.

Adverse proceedings such as litigation can be expensive, time consuming and may divert the efforts of our technical and managerial personnel, which could in turn materially and adversely affect our business, financial condition, results of operations and prospects, whether or not we receive a determination favorable to us. In addition, in an infringement proceeding, a court or other judicial body may decide that the patent we seek to enforce is invalid or unenforceable, or may refuse to stop the other party from using the technology at issue on the grounds that the patent in question does not cover the technology in question or that stopping the other party would harm the public interest. An adverse result in any litigation could put one or more of our patents at risk of being invalidated or interpreted narrowly. Some of our competitors may be able to devote significantly more resources to intellectual property litigation, and may have significantly broader patent portfolios to assert against us if we assert our rights against them. Further, because of the substantial discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be disclosed or otherwise compromised during litigation.

We may not be able to correctly estimate or control our future operating expenses in relation to obtaining intellectual property, enforcing intellectual property and/or defending intellectual property, which could affect operating expenses. Our operating expenses may fluctuate significantly in the future as a result of a variety of factors, including the costs of preparing, filing, prosecuting, defending and enforcing patent and trademark claims and other intellectual property-related costs, including adverse proceedings and litigation costs.

If we are unable to prevent disclosure of our trade secrets or other confidential information to third parties, our competitive position may be impaired.

In addition to the protection afforded by patents, we rely on confidentiality agreements to protect confidential information and proprietary know-how that is not patentable or that we elect not to patent, processes for which patents are difficult to enforce and any other elements of our product candidate discovery and development processes that involve proprietary know-how, information or technology that is not covered by patents. We seek to protect our proprietary technology and processes, in part, by entering into confidentiality agreements with our employees, consultants, scientific advisors and contractors. We cannot guarantee that we have entered into such agreements with each party that may have or have had access to our confidential information or proprietary technology and processes. We also seek to preserve the integrity and confidentiality of our data and other confidential information by maintaining physical security of our premises and physical and electronic security of our information technology systems. Agreements or security measures may be breached and detecting the disclosure or misappropriation of confidential information and enforcing a claim that a party illegally disclosed or misappropriated confidential information is


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difficult, expensive and time-consuming, and the outcome is unpredictable. Further, we may not be able to obtain adequate remedies for any breach. Costly and time-consuming litigation could be necessary to enforce and determine the scope of our proprietary rights, and failure to obtain or maintain trade secret protection could adversely affect our competitive business position. Furthermore, the laws of some other jurisdictions do not protect proprietary rights to the same extent or in the same manner as the laws of the United States. As a result, we may encounter significant problems in protecting and defending our intellectual property both in the United States and in other jurisdictions. In addition, our confidential information may otherwise become known or be independently discovered by competitors, in which case 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. The failure to obtain or maintain trade secret protection could adversely affect our competitive business position.

We license patent rights from third-party owners. Such licenses may be subject to early termination if we fail to comply with our obligations in our licenses with third parties, which could result in the loss of rights or technology that are material to our business.

We are or may become a party to licenses that give us rights to third-party intellectual property that are necessary or useful for our business, and we may enter into additional licenses in the future. Under these license agreements, we are or may become obligated to pay the licensor fees, which may include annual license fees, milestone payments, royalties, a percentage of revenues associated with the licensed technology and a percentage of sublicensing revenue. These fees may be significant, which could make it difficult for us to achieve or maintain profitability. In addition, under certain of such agreements, we are or may become required to diligently pursue the development of products using the licensed technology. If we fail to comply with these obligations including due to the impact of the COVID-19 pandemic on our business operations or our use of the intellectual property licensed to us in an unauthorized manner, and fail to cure our breach within a specified period of time, the licensor may have the right to terminate the applicable license, in which event we could lose valuable rights and technology that are material to our business, , harming our ability to develop, manufacture and/or commercialize our platform or product candidates. If the licensor retains control of prosecution of the patents and patent applications licensed to us, we may have limited or no control over the manner in which the licensor chooses to prosecute or maintain its patents and patent applications and have limited or no right to continue to prosecute any patents or patent applications that the licensor elects to abandon.

If the licensor retains control of prosecution of the patents and patent applications licensed to us, we may have limited or no control over the manner in which the licensor chooses to prosecute or maintain its patents and patent applications and have limited or no right to continue to prosecute any patents or patent applications that the licensor elects to abandon.

The licensing and acquisition of third-party intellectual property rights is a competitive practice, and companies that may be more established, or have greater resources than we do, may also be pursuing strategies to license or acquire third-party intellectual property rights that we may consider necessary or attractive in order to commercialize our product candidates. More established companies may have a competitive advantage over us due to their larger size and cash resources or greater clinical development and commercialization capabilities. There can be no assurance that we will be able to successfully complete such negotiations and ultimately acquire the rights to the intellectual property surrounding the additional product candidates that we may seek to acquire.

Our intellectual property agreements with third parties may be subject to disagreements over contract interpretation, which could narrow the scope of our rights to the relevant intellectual property or technology or increase our financial or other obligations to our licensors.

Certain provisions in our intellectual property agreements may be susceptible to multiple interpretations. The resolution of any contract interpretation disagreement that may arise could affect the scope of our rights to the relevant intellectual property or technology, or affect financial or other obligations under the relevant agreement, any of which could have a material adverse effect on our business, financial condition, results of operations and prospects.

In addition, while it is our policy to require our employees and contractors who may be involved in the conception or 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 conceives or develops intellectual


property that we regard as our own. Our assignment agreements may not be self-executing or may be breached, and

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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.

We may wish to form collaborations in the future with respect to our product candidates, but may not be able to do so or to realize the potential benefits of such transactions, which may cause us to alter or delay our development and commercialization plans.

Our product candidates may also require specific components to work effectively and efficiently, and rights to those components may be held by others. Any delays in entering into new collaborations or strategic partnership agreements related to our product candidates could delay the development and commercialization of our product candidates in certain geographies, which could harm our business prospects, financial condition and results of operations.

We jointly own certain patent rights with third parties. Our ability to out-license these patent rights, or to prevent the third party from out-licensing these patent rights, may be limited in certain countries.

We jointly own certain patents and patent applications with third parties, and may jointly own patents and patent applications with third parties in the future. Unless we enter into an agreement with the joint owner, we will be subject to certain default rules pertaining to joint ownership. Certain countries require the consent of all joint owners to license jointly owned patents, and if we are unable to obtain such consent from the joint owner, we may not be able to license our rights under these patents and patent applications. In certain other countries, including the United States, the joint owner could license its rights under these patents and patent applications to another party without our consent and without any duty of accounting to us.

We may be subject to claims challenging the inventorship or ownership of our patents and other intellectual property.

We may also be subject to claims that former employees, any future collaborators or other third parties have an ownership interest in our patents or other intellectual property. Litigation may be necessary to defend against these and other claims challenging inventorship or ownership. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights and could even face litigation for infringing patents that we had regarded as ours. Such an outcome could have a material adverse effect on our business. Even if we are successful in defending against such claims, litigation could result in substantial costs and distraction to management and other employees.

We or our licensors may have relied on third-party consultants or collaborators or on funds from third parties, such as national governments, such that we or our licensors are not the sole and exclusive owners of the patents we in-licensed. If other third parties have ownership rights or other rights to our patents, including in-licensed patents, they may be able to license such patents to our competitors, and our competitors could market competing products and technology. This could have a material adverse effect on our competitive position, business, financial conditions, results of operations, and prospects.

If our trademarks and trade names are not adequately protected, then we may not be able to build name recognition in our markets of interest and our business may be adversely affected.

Our registered or unregistered trademarks or trade names may be challenged, infringed, circumvented, declared generic or conflict with third-party rights. We may not be able to protect our rights to these trademarks and trade names, which we need to build name recognition with potential partners, physicians or patients in our markets of interest. During trademark registration proceedings, our trademark applications may be rejected. Although we are given an opportunity to respond to those rejections, we may be unable to overcome such rejections. In addition, in the USPTO and in comparable agencies in many foreign jurisdictions, third parties can oppose pending trademark applications and seek to cancel registered trademarks. Opposition or cancellation proceedings may be filed against our trademarks, and our trademarks may not survive such proceedings. Furthermore, third parties may file first for our trademarks in certain countries. If they succeeded in registering such trademarks, and if we are not successful in


challenging such third-party rights, we may not be able to use these trademarks to market our future products in those

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countries. We may license our trademarks and trade names to third parties, such as distributors. Though these license agreements may provide guidelines for how our trademarks and trade names may be used, a breach of these agreements or misuse of our trademarks and tradenames by our licensees may jeopardize our rights in or diminish the goodwill associated with our trademarks and trade names. In such cases, over the long term, if we are unable to establish and maintain name recognition based on our trademarks and trade names, then our commercial success abilities may be impacted.

Moreover, any name we propose to use with our product candidates in the United States or any other country must be approved by the FDA, EMA or any other relevant health authority regardless of whether we have registered it, or applied to register it, as a trademark. The FDA as well as EMA typically conducts a review of proposed product names, including an evaluation of potential for confusion with other product names. If the FDA, EMA or any other relevant approval authority objects to any of our proposed proprietary product names, we may be required to expend significant additional resources in an effort to identify a suitable substitute name that would qualify under applicable trademark laws, not infringe the existing rights of third parties and be acceptable to the FDA, EMA or any other relevant approval authority.

We may not be able to protect our intellectual property rights throughout the world.

Filing and prosecuting patent applications, and defending patents, related to our product candidates in all countries throughout the world would be prohibitively expensive, and the laws 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 may not be able to prevent third parties from practicing our inventions in all countries outside the United States, or from selling or importing products made using our 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 otherwise infringing products to territories where we have patent protection but enforcement is not as strong as that in the United States. These products may compete with any future products we may sell, and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in 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 pharmaceuticals and biopharmaceuticals, which could make it difficult for us to stop the infringement of our patents or marketing of competing products in violation of our proprietary rights generally. Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.

Risks Related to Government Regulation

Even if we obtain regulatory approval for a product candidate, our products will remain subject to regulatory scrutiny.

If our product candidates are approved, they will be subject to ongoing regulatory requirements for manufacturing, labeling, packaging, storage, advertising, promotion, sampling, record-keeping, conduct of post-marketing studies and submission of safety, efficacy and other post-market information, including both federal and state requirements in the United States and requirements of comparable foreign regulatory authorities.

Manufacturers and manufacturers’ facilities are required to comply with extensive FDA and comparable foreign regulatory authority requirements, including ensuring that quality control and manufacturing procedures conform to cGMP regulations. As such, we and our contract manufacturers will be subject to continual review and inspections to assess compliance with cGMPs and adherence to commitments made in any approved marketing application.


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Accordingly, we and others with whom we work must continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production and quality control.

We will have to comply with requirements concerning advertising and promotion for any future products. Promotional communications with respect to prescription drugs and biologics are subject to a variety of legal and regulatory restrictions and must be consistent with the information in the product’s approved label. We may not promote products for indications or uses for which they do not have approval. The holder of an approved application must submit new or supplemental applications and obtain approval for certain changes to the approved product, product labeling or manufacturing process. We could also be asked to conduct post-marketing clinical trials to verify the safety, purity, potency and/or efficacy of our products in general or in specific patient subsets. An unsuccessful post-marketing study or failure to complete such a study could result in the withdrawal of marketing approval.

If a regulatory agency discovers previously unknown problems with a product, such as adverse events of unanticipated severity or frequency, or problems with the facility where the product is manufactured, or disagrees with the promotion, marketing or labeling of a product, such regulatory agency may impose restrictions on that product or us, including requiring withdrawal of the product from the market. If we fail to comply with applicable regulatory requirements, a regulatory agency or enforcement authority may, among other things:

issue warning letters;
impose civil or criminal penalties;
suspend or withdraw regulatory approval;
suspend any of our clinical trials;
refuse to approve pending applications or supplements to approved applications submitted by us;
impose restrictions on our operations, including closing our contract manufacturers’ facilities; or
seize or detain products, or require a product recall.

issue warning letters;

impose civil or criminal penalties;

suspend or withdraw regulatory approval;

suspend any of our clinical trials;

refuse to approve pending applications or supplements to approved applications submitted by us;

impose restrictions on our operations, including closing our contract manufacturers’ facilities; or

seize or detain products, or require a product recall.

Any government investigation of alleged violations of law could require us to expend significant time and resources in response and could generate negative publicity. Any failure to comply with ongoing regulatory requirements may significantly and adversely affect our ability to commercialize and generate revenue from any future products. If regulatory sanctions are applied or if regulatory approval is withdrawn, the value of our company and our operating results of operations will be adversely affected.

Moreover, the policies of the FDA and of other regulatory authorities may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates. We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative or executive action, either in the United States or abroad. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may be subject to enforcement action and we may not achieve or sustain profitability.

Enacted and future healthcare legislation may increase the difficulty and cost for us to obtain marketing approval of and commercialize our product candidates and may affect the prices we may set.

In the United States, the EU and other jurisdictions, there have been, and we expect there will continue to be, a number of legislative and regulatory changes and proposed changes to the healthcare system that could affect our future results of operations. In particular, there have been and continue to be a number of initiatives at the U.S. federal and state levels that seek to reduce healthcare costs and improve the quality of healthcare. For example, in March 2010, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, or collectively the ACA, was enacted, which substantially changed the way healthcare is financed by both governmental and private insurers. Among the provisions of the ACA, those of greatest importance to the pharmaceutical, biopharmaceutical and biotechnology industries include the following:

an annual, non-deductible fee payable by any entity that manufactures or imports certain branded prescription drugs and biologic agents (other than those designated as Orphan Drugs), which is

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apportioned among these entities according to their market share in certain government healthcare programs;
a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 70% point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D;
new requirements to report certain financial arrangements with physicians and teaching hospitals, including reporting “transfers of value” made or distributed to prescribers and other healthcare providers and reporting investment interests held by physicians and their immediate family members;
an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program to 23.1% and 13.0% of the average manufacturer price for branded and generic drugs, respectively;
a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted or injected;
extension of a manufacturer’s Medicaid rebate liability to covered drugs dispensed to individuals who are enrolled in Medicaid managed care organizations;
expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to certain individuals with income at or below 133% of the federal poverty level, thereby potentially increasing a manufacturer’s Medicaid rebate liability;
a licensure framework for follow on biologic products;
a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research; and
establishment of a Center for Medicare and Medicaid Innovation at the Centers for Medicare & Medicaid Services, or CMS, to test innovative payment and service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug spending.

an annual, non-deductible fee payable by any entity that manufactures or imports certain branded prescription drugs and biologic agents (other than those designated as Orphan Drugs), which is


apportioned among these entities according to their market share in certain government healthcare programs;

a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 70% point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D;

new requirements to report certain financial arrangements with physicians and teaching hospitals, including reporting “transfers of value” made or distributed to prescribers and other healthcare providers and reporting investment interests held by physicians and their immediate family members;

an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program to 23.1% and 13.0% of the average manufacturer price for branded and generic drugs, respectively;

a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are inhaled, infused, instilled, implanted or injected;

extension of a manufacturer’s Medicaid rebate liability to covered drugs dispensed to individuals who are enrolled in Medicaid managed care organizations;

expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to certain individuals with income at or below 133% of the federal poverty level, thereby potentially increasing a manufacturer’s Medicaid rebate liability;

a licensure framework for follow on biologic products;

a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research; and

establishment of a Center for Medicare and Medicaid Innovation at the Centers for Medicare & Medicaid Services, or CMS, to test innovative payment and service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug spending.

Since its enactment, there have been judicial, Congressional and executive branch challenges to certain aspects of the ACA. On June 17, 2021, the U.S. Supreme Court dismissed the most recent judicial challenge to the ACA without specifically ruling on the constitutionality of the ACA. Prior to the U.S. Supreme Court’s decision, President Biden issued an executive order to initiate a special enrollment period from February 15, 2021 through August 15, 2021 for purposes of obtaining health insurance coverage through the ACA marketplace. The executive order also instructed certain governmental agencies to review and reconsider their existing policies and rules that limit access to healthcare, including among others, reexamining Medicaid demonstration projects and waiver programs that include work requirements, and policies that create unnecessary barriers to obtaining access to health insurance coverage through Medicaid or the ACA. It is unclear how other healthcare reform measures of the Biden administration will impact our business.

In addition, otherOther legislative changes have been proposed and adopted in the United States since the Affordable Care ActACA was enacted. In August 2011,On March 11, 2021, the Budget ControlAmerican Rescue Plan Act of 2011, among other things, led to aggregate reductions of Medicare payments to providers of 2% per fiscal year. These reductions went into effect in April 2013 and, due to subsequent legislative amendments to the statute, will remain in effect through 2030, with the exception of a temporary suspension from May 1, 2020 through March 31, 2022, unless additional action is taken by Congress. In addition, in January 2013, the American Taxpayer Relief Act of 20122021 was signed into law, which among other things, further reduced Medicare payments to several typeseliminates the statutory Medicaid drug rebate cap, currently set at 100% of providers, including hospitals, imaging centers and cancer treatment centers, and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. These new lawsa drug’s average manufacturer price, or any other similar laws introduced in the future may result in additional reductions in Medicare and other health care funding, which could negatively affect our customers and accordingly, our financial operations.


AMP, beginning January 1, 2024. Moreover, payment methodologies may be subject to changes in healthcare legislation and regulatory initiatives. For example, CMS may develop new payment and delivery models, such as bundled payment models.

In addition, recently there has been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products, which has resulted in several U.S. Congressional inquiries and proposed and enacted federal and state legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under government payor programs, and review the relationship between pricing and manufacturer patient programs. Most recently, on August 16, 2022, the Inflation Reduction Act of 2022, or IRA, was signed into law. Among other things, the IRA requires manufacturers of certain drugs to engage in price negotiations with Medicare (beginning in 2026), with prices that can be negotiated subject to a cap; imposes rebates under Medicare Part B and Medicare Part D to penalize price increases that outpace inflation (first due in 2023); and replaces the Part

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D coverage gap discount program with a new discounting program (beginning in 2025). The IRA permits the Secretary of the Department of Health and Human Services to implement many of these provisions through guidance, as opposed to regulation, for the initial years. For that and other reasons, it is currently unclear how the IRA will be effectuated. We expect that additional U.S. federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that the U.S. federal government will pay for healthcare products and services, which could result in reduced demand for our product candidates or additional pricing pressures.

Individual states in the United States have also become increasingly active in passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. Legally-mandatedLegally mandated price controls on payment amounts by third-party payors or other restrictions could materially and adversely affect our business, financial condition, results of operations and prospects. In addition, regional healthcare authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs. This could reduce the ultimate demand for our product candidates or put pressure on our product pricing.

In the EU, similar political, economic and regulatory developments may affect our ability to profitably commercialize our product candidates, if approved. In addition to continuing pressure on prices and cost containment measures, legislative developments at the EU or member state level may result in significant additional requirements or obstacles that may increase our operating costs. The delivery of healthcare in the EU, including the establishment and operation of health services and the pricing and reimbursement of medicines, is almost exclusively a matter for national, rather than EU, law and policy. National governments and health service providers have different priorities and approaches to the delivery of health care and the pricing and reimbursement of products in that context. In general, however, the healthcare budgetary constraints in most EU member states have resulted in restrictions on the pricing and reimbursement of medicines by relevant health service providers. Coupled with ever-increasing EU and national regulatory burdens on those wishing to develop and market products, this could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to commercialize our product candidates, if approved. In markets outside of the United States and EU, reimbursement and healthcare payment systems vary significantly by country, and many countries have instituted price ceilings on specific products and therapies.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative or judicial action in the United States, the EU or any other jurisdiction. If we or any third parties we may engage are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we or such third parties are not able to maintain regulatory compliance, our product candidates may lose any regulatory approval that may have been obtained and we may not achieve or sustain profitability.

If we develop a small molecule product candidate that obtains regulatory approval, additional competitors could enter the market with generic versions of such drugs, which may result in a material decline in sales of affected products.

Under the Drug Price Competition and Patent Term Restoration Act of 1984, or the Hatch-Waxman Act, a pharmaceutical manufacturer may submit an abbreviated new drug application, or ANDA, seeking approval of a generic version of an approved, small molecule innovator product. Under the Hatch-Waxman Act, a manufacturer may also submit a new drug application, oran NDA under section 505(b)(2) of the Federal Food, Drug, and Cosmetic Act that references the FDA’s prior findings of safety and effectiveness of of the small molecule innovator product. For example, a 505(b)(2) NDA product may be for a new or improved version of the original innovator product. The Hatch-Waxman Act also provides for certain periods of regulatory exclusivity, which preclude FDA approval (or in some circumstances, FDA filing and review) of an ANDA or 505(b)(2) NDA. In addition to the benefits of regulatory exclusivity, an innovator NDA holder may have patents claiming the active ingredient, product formulation or an approved use of the drug, which would be listed with the product in the FDA publication, “Approved Drug Products


with Therapeutic Equivalence Evaluations,” known as the Orange Book. If there are patents listed in the Orange Book for a product, a generic or 505(b)(2) applicant that seeks to market its product before expiration of the patents must include in their applications what is known as a “Paragraph IV” certification, challenging the validity or enforceability of, or claiming

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non-infringement of, the listed patent or patents. Notice of the certification must be given to the patent owner and NDA holder and if, within 45 days of receiving notice, either the patent owner or NDA holder sues for patent infringement, approval of the ANDA or 505(b)(2) NDA is stayed for up to 30 months.

Accordingly, if our small molecule program results in a product that is approved, competitors could submit ANDAs for generic versions of our small molecule drug products or 505(b)(2) NDAs that reference our small molecule drug products. If there are patents listed for our small molecule drug products in the Orange Book, those ANDAs and 505(b)(2) NDAs would be required to include a certification as to each listed patent indicating whether the ANDA applicant does or does not intend to challenge the patent. We cannot predict which, if any, patents in our current portfolio or patents we may obtain in the future will be eligible for listing in the Orange Book, how any generic competitor would address such patents, whether we would sue on any such patents, or the outcome of any such suit.

We may not be successful in securing or maintaining proprietary patent protection for products and technologies we develop or license. Moreover, if any of our owned or in-licensed patents that are listed in the Orange Book are successfully challenged by way of a Paragraph IV certification and subsequent litigation, the affected product could immediately face generic competition and its sales would likely decline rapidly and materially.

Our business operations and current and future relationships with investigators, healthcare professionals, consultants, third-party payors, patient organizations and customers will be subject to applicable healthcare regulatory laws, which could expose us to penalties.

Our business operations and current and future arrangements with investigators, healthcare professionals, consultants, third-party payors, patient organizations and customers may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations. These laws may constrain the business or financial arrangements and relationships through which we conduct our operations, including how we research, market, sell and distribute our product candidates, if approved. Such laws include, without limitation:

the U.S. federal civil and criminal Anti-Kickback Statute, which prohibits, among other things, persons or entities from knowingly and willfully soliciting, offering, receiving or providing any remuneration (including any kickback, bribe, or certain rebate), directly or indirectly, overtly or covertly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, lease, order or recommendation of, any good, facility, item or service, for which payment may be made, in whole or in part, under U.S. federal and state healthcare programs such as Medicare and Medicaid. A person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation;
the U.S. federal false claims laws, including the False Claims Act, which can be enforced through whistleblower actions, and civil monetary penalties laws, which, among other things, impose criminal and civil penalties against individuals or entities for knowingly presenting, or causing to be presented, to the U.S. federal government, claims for payment or approval that are false or fraudulent, knowingly making, using or causing to be made or used, a false record or statement material to a false or fraudulent claim, or from knowingly making a false statement to avoid, decrease or conceal an obligation to pay money to the U.S. federal government. In addition, the government may assert that a claim including items and services resulting from a violation of the U.S. federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the False Claims Act;
the Health Insurance Portability and Accountability Act of 1996, which imposes criminal and civil liability for, among other things, knowingly and willfully executing, or attempting to execute, 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 statement, in connection with the delivery of, or payment for, healthcare benefits, items or services; similar to the U.S. federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation;
federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that potentially harm consumers;

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the U.S. Physician Payments Sunshine Act and its implementing regulations, which require certain manufacturers of drugs, devices, biologics and medical supplies that are reimbursable under Medicare, Medicaid or the Children’s Health Insurance Program to report annually to the government information related to certain payments and other transfers of value to physicians, as defined by such law, certain non-physician providers such as physician assistants and nurse practitioners, and teaching hospitals, as well as ownership and investment interests held by the physicians described above and their immediate family members;
analogous U.S. state laws and regulations, including: state anti-kickback and false claims laws, which may apply to our business practices, including but not limited to, research, distribution, sales and marketing arrangements and claims involving healthcare items or services reimbursed by any third-party payor, including private insurers; state laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the U.S. federal government, or otherwise restrict payments that may be made to healthcare providers and other potential referral sources; and state and local laws that require the registration of pharmaceutical sales representatives; state laws and regulations that require drug manufacturers to file reports relating to pricing and marketing information, which requires tracking gifts and other remuneration and items of value provided to healthcare professionals and entities; and
the U.S. Foreign Corrupt Practices Act of 1977, as amended, which prohibits, among other things, U.S. companies and their employees and agents from authorizing, promising, offering or providing, directly or indirectly, corrupt or improper payments or anything else of value to foreign government officials, employees of public international organizations and foreign government owned or affiliated entities, candidates for foreign political office and foreign political parties or officials thereof.

the U.S. federal civil and criminal Anti-Kickback Statute, which prohibits, among other things, persons or entities from knowingly and willfully soliciting, offering, receiving or providing any remuneration (including any kickback, bribe, or certain rebate), directly or indirectly, overtly or covertly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, lease, order or recommendation of, any good, facility, item or service, for which payment may be made, in whole or in part, under U.S. federal and state healthcare programs such as Medicare and Medicaid. A person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation;

the U.S. federal false claims laws, including the False Claims Act, which can be enforced through whistleblower actions, and civil monetary penalties laws, which, among other things, impose criminal and civil penalties against individuals or entities for knowingly presenting, or causing to be presented, to the U.S. federal government, claims for payment or approval that are false or fraudulent, knowingly making, using or causing to be made or used, a false record or statement material to a false or fraudulent claim, or from knowingly making a false statement to avoid, decrease or conceal an obligation to pay money to the U.S. federal government. In addition, the government may assert that a claim including items and services resulting from a violation of the U.S. federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the False Claims Act;

the Health Insurance Portability and Accountability Act of 1996, or HIPAA, which imposes criminal and civil liability for, among other things, knowingly and willfully executing, or attempting to execute, 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 statement, in connection with the delivery of, or payment for, healthcare benefits, items or services; similar to the U.S. federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation;


federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that potentially harm consumers;

the U.S. Physician Payments Sunshine Act and its implementing regulations, which require certain manufacturers of drugs, devices, biologics and medical supplies that are reimbursable under Medicare, Medicaid or the Children’s Health Insurance Program to report annually to the government information related to certain payments and other transfers of value to physicians, as defined by such law, certain non-physician providers such as physician assistants and nurse practitioners, and teaching hospitals, as well as ownership and investment interests held by the physicians described above and their immediate family members;

analogous U.S. state laws and regulations, including: state anti-kickback and false claims laws, which may apply to our business practices, including but not limited to, research, distribution, sales and marketing arrangements and claims involving healthcare items or services reimbursed by any third-party payor, including private insurers; state laws that require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the U.S. federal government, or otherwise restrict payments that may be made to healthcare providers and other potential referral sources; and state and local laws that require the registration of pharmaceutical sales representatives; state laws and regulations that require drug manufacturers to file reports relating to pricing and marketing information, which requires tracking gifts and other remuneration and items of value provided to healthcare professionals and entities; and

the U.S. Foreign Corrupt Practices Act of 1977, as amended, which prohibits, among other things, U.S. companies and their employees and agents from authorizing, promising, offering or providing, directly or indirectly, corrupt or improper payments or anything else of value to foreign government officials, employees of public international organizations and foreign government owned or affiliated entities, candidates for foreign political office and foreign political parties or officials thereof

Ensuring that our internal operations and future business arrangements with third parties comply with applicable healthcare laws and regulations will involve substantial costs. It is possible that governmental authorities will conclude that our business practices, such as the provision of stock options to physicians who may influence the ordering, prescribing or use of our product candidates, if approved, as compensation for consulting services, do not comply with current or future statutes, regulations, agency guidance 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 the laws described above or any other governmental laws and regulations that may apply to us, we may be subject to significant penalties, including civil, criminal and administrative penalties, damages, fines, exclusion from government-funded healthcare programs, such as Medicare and Medicaid or similar programs in other countries or jurisdictions, disgorgement, imprisonment, contractual damages, reputational harm, diminished profits and the curtailment or restructuring of our operations. Further, defending against any such actions can be costly and time-consuming and may require significant personnel resources. Even if we are successful in defending against any such actions that may be brought against us, our business may be impaired.

Risks Related to Our Common Stock

Our stock price mayhas been volatile, and could in the future be volatile, and you may not be able to resell shares of our common stock at or above the price you paid.

The tradingstock price of our common stock mayhas been, and could in the future be, highly volatile and subject to substantial volatility and wide fluctuations in response to various factors, some of which are beyond our control. In particular, the tradingstock prices for pharmaceutical, biopharmaceutical and biotechnology companies have been highly volatile as a result of extreme volatility and disruptions in the global economy, including rising inflation and interest rates, declines in economic growth, the war between Russia and Ukraine, the COVID-19 pandemic.pandemic and uncertainty about economic stability, including a potential recession. These factors include those discussed in this “Risk Factors” section and others such as:

results from, and delays in, our clinical trials for our product candidates or any other future clinical development programs, including delays related to the COVID-19 pandemic;
announcements of regulatory approval or disapproval of our current or any future product candidates;
failure or discontinuation of any of our research and development programs;

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the termination of any of our existing license agreements;
announcements relating to any future licensing, collaboration or development agreements;
delays in the commercialization of our current or any future product candidates;
public misperception regarding the use of our product candidates;
acquisitions and sales of new products or product candidates, technologies or businesses;
manufacturing and supply issues related to our product candidates for clinical trials or future product candidates for commercialization;
quarterly variations in our results of operations or those of our competitors;
changes in earnings estimates or recommendations by securities analysts;
announcements by us or our competitors of new products or product candidates, significant contracts, commercial relationships, acquisitions or capital commitments;
developments with respect to intellectual property rights;
our commencement of, or involvement in, litigation;
changes in financial estimates or guidance;
any major changes in our board of directors or management;
new legislation or regulation in the United States relating to the sale or pricing of pharmaceuticals;
FDA or other U.S. or foreign regulatory actions affecting us or our industry;
product liability claims or other litigation or public concern about the safety of our product candidates;
market conditions in the pharmaceutical, biopharmaceutical and biotechnology sectors;
general economic conditions in the United States and abroad, including as a result of an economic recession or depression and market volatility related to the COVID-19 pandemic, the current inflationary economic environment, rising interest rates and global health concerns;
sales of our common stock, including sales by our officers, directors and specific existing stockholders; and
the issuance of shares of our common stock pursuant to the exercise of outstanding warrants.

results from, and delays in, our clinical trials for our product candidates or any other future clinical development programs, including delays related to the COVID-19 pandemic;

announcements of regulatory approval or disapproval of our current or any future product candidates;

failure or discontinuation of any of our research and development programs;


the termination of any of our existing license agreements;

announcements relating to any future licensing, collaboration or development agreements;

delays in the commercialization of our current or any future product candidates;

public misperception regarding the use of our product candidates;

acquisitions and sales of new products or product candidates, technologies or businesses;

manufacturing and supply issues related to our product candidates for clinical trials or future product candidates for commercialization;

quarterly variations in our results of operations or those of our competitors;

changes in earnings estimates or recommendations by securities analysts;

announcements by us or our competitors of new products or product candidates, significant contracts, commercial relationships, acquisitions or capital commitments;

developments with respect to intellectual property rights;

our commencement of, or involvement in, litigation;

changes in financial estimates or guidance;

any major changes in our board of directors or management;

new legislation or regulation in the United States relating to the sale or pricing of pharmaceuticals;

FDA or other U.S. or foreign regulatory actions affecting us or our industry;

product liability claims or other litigation or public concern about the safety of our product candidates;

market conditions in the pharmaceutical, biopharmaceutical and biotechnology sectors; and

general economic conditions in the United States and abroad, including as a result of an economic recession or depression and market volatility related to the COVID-19 pandemic and global health concerns.

In addition, the stock markets in general, and the markets for pharmaceutical, biopharmaceutical and biotechnology stocks in particular, have experienced extreme volatility that may have been unrelated to the operating performance of the issuer. These broad market fluctuations may adversely affect the tradingstock price or liquidity of our common stock.

An active, liquid and orderly market for our common stock may not develop, and you may not be able to resell your common stock at or above the price you paid.

Prior to our initial public offeringIPO in July 2020, there was no public market for shares of our common stock, and an active public trading market for our shares may not develop or, if it is developed, may not be sustained. The lack of an active market may impair your ability to sell your shares at the time you wish to sell them or at a price that you consider reasonable. An inactive market may also impair our ability to raise capital by selling shares and may impair our ability to acquire other product candidates, businesses or technologies using our shares as consideration.

As of December 31, 2021, weWe are no longer an “emerging growtha “smaller reporting company,” and as a result of the reduced disclosure and governance requirements applicable to emerging growthsmaller reporting companies, no longer apply to us.

As of December 31, 2021, we ceased to qualify as an “emerging growth company,” as defined by the Jumpstart Our Businesses Act of 2012, or the JOBS Act, because on June 30, 2021, the market value of our common stock that was held by non-affiliates exceeded $700 million. may be less attractive to investors.

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As of June 30, 2022, we re-qualified as a result, wesmaller reporting company. We are no longer permittedtherefore entitled to take advantage of the reduced reporting and governance requirements that are available to emerging growth companies, including not being required to comply with the auditor attestation requirements of Section 404(b)many of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation, andsame exemptions from thedisclosure requirements of holding non-


binding advisory votes on executive compensation and golden parachute payments. Although we are no longeras an emerging growth company, we remain eligible to take advantage of smaller reporting company reporting requirements through this Annual Report on Form 10-K, including reduced disclosure obligations regarding executive compensation that will be incorporated in this Annual Report on Form 10-K by reference to the information set forth in our periodic reports and proxy statement forstatements. In addition, as a smaller reporting company with less than $100 million in annual revenue, we are exempt from the requirement to obtain an auditor attestation on the effectiveness of our 2022 Annual Meetinginternal control over financial reporting provided in Section 404(b) of Stockholders,the Sarbanes-Oxley Act of 2002, or the Proxy Statement, which will be filed with theSarbanes-Oxley Act. These exemptions and reduced disclosures in our SEC no later than 120 days after December 31, 2021.  

As we are no longer an emerging growthfilings due to our status as a smaller reporting company we expectmay make it harder for investors to incur additional expenses and devote substantial management effort toward ensuring compliance with those requirements applicable to companies that are not emerging growth companies. Compliance with these additional laws, rules and regulations has increased, and will continue to increase,analyze our legalresults of operations and financial compliance costs, make some activities more difficult, time consuming or costly and increase demand on our systems and resources. In addition, management’s attention may be diverted from other business concerns and our costs and expenses will increase, which could harm our business and operating results. We may also need to hire more employees in the future or engage additional outside consultants to comply with these requirements, which will increase our costs and expenses.prospects.

We incur significant costs as a result of operating as a public company, and our management needs to devote substantial time to compliance initiatives. We may fail to comply with the rules that apply to public companies, which could result in sanctions or other penalties that could materially and adversely affect our business, financial condition, results of operations and prospects.

We incur significant legal, accounting and other expenses as a public company, including costs resulting from public company reporting obligations under the Exchange Act and regulations regarding corporate governance practices. The listing requirements of Thethe Nasdaq Stock Market LLC and the rules of the Securities and Exchange Commission, or SEC require that we satisfy certain corporate governance requirements relating to director independence, filing annual and interim reports, stockholder meetings, approvals and voting, soliciting proxies, conflicts of interest and a code of conduct. Our management and other personnel needs to devote a substantial amount of time to ensure that we comply with all of these requirements. Moreover, these reporting requirements, rules and regulations increase our legal and financial compliance costs and make some activities more time-consuming and costly. These reporting requirements, rules and regulations, coupled with the increase in potential litigation exposure associated with being a public company, could also make it more difficult for us to attract and retain qualified persons to serve on our board of directors or board committees or to serve as executive officers, or to obtain certain types of insurance, including directors’ and officers’ insurance, on acceptable terms.

If we experience material weaknesses in the future or otherwise fail to maintain an effective system of internal controls in the future, we may not be able to accurately report our financial condition or results of operations which may adversely affect investor confidence in us and, as a result, the value of our common stock.

We are subject to Section 404 of the Sarbanes-Oxley Act, of 2002, or Section 404, and the related rules of the SEC, which generally require our management and independent registered public accounting firm to report on the effectiveness of our internal control over financial reporting. Pursuant to Section 404, beginning with this Annual Report on Form 10-K,404(a), we are required to file with the SEC an annual management assessment of the effectiveness of our internal control over financial reporting. Because we arere-qualified as a “large accelerated filer”smaller reporting company and we have less than $100 million in annual revenue, as of December 31, 2021,2022, we are subjecta non-accelerated filer and are no longer be required to comply with the reportingauditor attestation requirements under Section 404(b) of the Sarbanes-Oxley Act, and our independent registered public accounting firm must attest toregarding the effectiveness of our internal control over financial reporting asunder Section 404(b) of such date.the Sarbanes-Oxley Act until we become an accelerated filer or large accelerated filer.

Our management’s assessment needs to include disclosure of any material weaknesses identified by our management in our internal control over financial reporting. A material weakness is a deficiency or combination of deficiencies in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of a company’s annual and interim financial statements will not be detected or prevented on a timely basis. If we identify one or more material weaknesses in our internal control over financial reporting, we will be unable to assert that our internal controls are effective. The effectiveness of our controls and procedures may be limited by a variety of factors, including:

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faulty human judgment and simple errors, omissions or mistakes;

fraudulent action of an individual or collusion of two or more people;
inappropriate management override of procedures; and
the possibility that any enhancements to controls and procedures may still not be adequate to assure timely and accurate financial control.

faulty human judgment and simple errors, omissions or mistakes;

fraudulent action of an individual or collusion of two or more people;

inappropriate management override of procedures; and

the possibility that any enhancements to controls and procedures may still not be adequate to assure timely and accurate financial control.

While we believe our internal control over financial reporting is currently effective, the effectiveness of our internal controls in future periods is subject to the risk that our controls may become inadequate because of changes in conditions. Establishing, testing and maintaining an effective system of internal control over financial reporting requires significant resources and time commitments on the part of our management and our finance staff, may require additional staffing and infrastructure investments and would increase our costs of doing business. We can give no assurance that material weaknesses in our internal control over financial reporting will not be identified in the future. Our failure to implement and maintain effective internal control over financial reporting could result in errors in our financial statements that could result in a restatement of our financial statements and cause us to fail to meet our reporting obligations. Effective internal control over financial reporting is necessary for us to provide reliable and timely financial reports and, together with adequate disclosure controls and procedures, are designed to reasonably detect and prevent fraud. Any failure to implement required new or improved controls, or difficulties encountered in their implementation, could cause us to fail to meet our reporting obligations. An independent assessment of the effectiveness of our internal control over financial reporting could detect problems that our management’s assessment might not. Undetected material weaknesses in our internal control over financial reporting could lead to financial statement restatements and require us to incur the expense of remediation. Any failure to report our financial results on an accurate and timely basis could result in sanctions, lawsuits, delisting of our shares from the Nasdaq Global Select Market or other adverse consequences that would materially and adversely affect our business, financial condition, results of operations and prospects.

If we sell shares of our common stock in the future, stockholders may experience immediate dilution and, as a result, our stock price may decline.

We may from time to time issue additional shares of common stock at a discount from the current trading price of our common stock. As a result, our stockholders would experience immediate dilution upon the purchase of any shares of our common stock sold at such discount. In addition, as opportunities present themselves, we may enter into financing or similar arrangements in the future, including the issuance of debt securities, preferred stock or common stock. For example, in August 2021, we entered into a sales agreement with Cowen and Company LLC, as sales agent, pursuant to which we may issue and sell shares of our common stock for an aggregate maximum offering price of $100.0 million under an at-the-market offering program. If we issue common stock or securities convertible into common stock, our common stockholders would experience additional dilution and, as a result, our stock price may decline.

Our principal stockholders and management own a significant percentage of our stock and will be able to exert significant control over matters subject to stockholder approval.

As of December 31, 2021,2022, our executive officers, directors, holders of 5% or more of our capital stock and their respective affiliates beneficially owned approximately a majority of our outstanding voting stock. In addition, in our July 2022 private placement, certain of the holders of 5% or more of our capital stock acquired pre-funded warrants to purchase shares of our common stock (which are immediately exercisable and have an exercise price of $0.001 per share) and common warrants to purchase shares of our common stock (which are immediately exercisable and have an exercise price of $5.806875 per share). Until exercised, the shares issuable upon the exercise of the pre-funded warrants and the common warrants are not included in the number of our outstanding shares of common stock. If such holders exercise their warrants, then the shares of our capital stock beneficially owned by our executive officers, directors, holders of 5% or more of our capital stock and their respective affiliates would increase significantly. Therefore, these stockholders will have the ability to influence us through this ownership position. These stockholders may be able to determine all matters requiring stockholder approval. For example, these stockholders may be able to control elections of directors, amendments of our organizational documents, or approval of any merger, sale of assets or other major corporate transaction. This may prevent or discourage unsolicited acquisition proposals or offers for our common stock that you may feel are in your best interest as one of our stockholders.


Our current shares outstanding and resulting market valuation do not reflect shares of our common stock issuable upon the exercise of pre-funded warrants and common warrants that are exercisable at the discretion of the holders of such warrants. If we sell shares of our common stock in the future, stockholders may experience immediate dilution. Stockholders may be unable to compute the dilutive impact of future financings.

We may from time to time issue additional shares of common stock, and as a result, our stockholders would experience immediate dilution. In addition, as opportunities present themselves, we may enter into financing or similar arrangements in the future, including the issuance of debt securities, preferred stock or common stock. For example, in August 2021, we entered into a sales agreement with Cowen, as sales agent, pursuant to which we may issue and sell shares of our common stock for an aggregate maximum offering price of $100.0 million under an at-the-market offering program under which we have sold approximately $18.0 million of shares of our common stock. In addition,

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in July 2022, we closed a private placement which included the sale of pre-funded warrants and common warrants to purchase shares of our common stock. Until exercised, the shares issuable upon the exercise of the pre-funded warrants or the common warrants are not included in the number of our outstanding shares of common stock. If we issue common stock or securities convertible into common stock in the future, our stockholders would experience additional dilution and such dilutive impact may be difficult to compute.

Sales of a substantial number of shares of our common stock in the public market could cause our stock price to fall.

If our existing stockholders sell, or indicate an intention to sell, substantial amounts of our common stock in the public market, the tradingstock price of our common stock could decline. As of December 31, 2021, we had2022, the number of shares of our common stock outstanding a total of 38,560,854was 47,722,995. This number does not include 24,696,206 shares of common stock issuable upon the exercise of pre-funded warrants or 8,427,508 shares of common stock issuable upon the exercise of common warrants. We filed a resale registration statement with the SEC to register the shares of common stock and the shares of common stock issuable upon exercise of the pre-funded warrants and the common warrants sold in the July 2022 private placement. Sales of a substantial number of shares of our common stock in the public market, or the perception that these sales might occur, may reduce the stock price of our common stock.

Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.

Under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, or the Code, if a corporation undergoes an “ownership change,” generally defined as a greater than 50 percentage point change (by value) in its equity ownership by certain stockholders over a rolling three-year period, the corporation’s ability to use its pre-change net operating loss carryforwards, or NOLs, and other pre-change tax attributes (such as research and development tax credits) to offset its post-change income or taxes may be limited. If finalized, Treasury Regulations currently proposed under Section 382 of the Code may further limit our ability to utilize our pre-change NOLs or credits if we undergo a future ownership change.

We completed a study through June 30,December 31, 2021, to determine whether an ownership change had occurred under Section 382 or 383 of the Code, and we determined that an ownership changechanges occurred in 2011, 2014, 2020 and 2020.2021. The Company has identified $0.1 million and $39.9$34.7 million of federal and state net operating losses,NOLs, respectively, that will expire unused due to ownership changes, and federal credits of $3.7 million that will not be able to be utilized due to ownership change limitation and excluded these amounts from deferred tax asset balances as of December 31, 2021. Federal operating losses carryforwardsNOLs of $257.8$286.5 million and state and local net operating loss carryforwardsNOLs of $30.8$36.4 million are not expected to expire unutilized as a result of ownership changes identified through June 30,December 31, 2021.

Our ability to use net operating loss carryforwards,NOLs, research and development credit carryforwards and other tax attributes to reduce future taxable income and tax liabilities may be further limited as a result of future changesshifts in our stock ownership subsequent to June 30,December 31, 2021. As a result, even if we attain profitability, our ability to use our pre-change net operating loss carryforwardsNOLs or other pre-change tax attributes to offset United States federal and state taxable income may still be subject to limitations, which could potentially result in increased future tax liability to us.further limitations.

Provisions in our charter documents and under Delaware law could discourage a takeover that stockholders may consider favorable and may lead to entrenchment of management.

Our amended and restated certificate of incorporation and amended and restated bylaws contain provisions that could delay or prevent changes in control or changes in our management without the consent of our board of directors. These provisions include the following:

a classified board of directors with three-year staggered terms, which may delay the ability of stockholders to change the membership of a majority of our board of directors;
no cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates;
the exclusive right of our board of directors to elect a director to fill a vacancy, however occurring, including by an expansion of the board of directors, which prevents stockholders from being able to fill vacancies on our board of directors;

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the ability of our board of directors to authorize the issuance of shares of preferred stock and to determine the price and other terms of those shares, including voting or other rights or preferences, without stockholder approval, which could be used to significantly dilute the ownership of a hostile acquiror;
the ability of our board of directors to alter our amended and restated bylaws without obtaining stockholder approval;
the required approval of at least 66 2/3% of the shares entitled to vote at an election of directors to adopt, amend or repeal our amended and restated bylaws or repeal the provisions of our amended and restated certificate of incorporation regarding the election and removal of directors;
a prohibition on stockholder action by written consent, which forces stockholder action to be taken at an annual or special meeting of our stockholders;
the requirement that a special meeting of stockholders may be called only by the board of directors, which may delay the ability of our stockholders to force consideration of a proposal or to take action, including the removal of directors; and
advance notice procedures that stockholders must comply with in order to nominate candidates to our board of directors or to propose matters to be acted upon at a stockholders’ meeting, which may discourage or deter a potential acquiror from conducting a solicitation of proxies to elect the acquiror’s own slate of directors or otherwise attempting to obtain control of us.

a classified board of directors with three-year staggered terms, which may delay the ability of stockholders to change the membership of a majority of our board of directors;

no cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates;

the exclusive right of our board of directors to elect a director to fill a vacancy, however occurring, including by an expansion of the board of directors, which prevents stockholders from being able to fill vacancies on our board of directors;

the ability of our board of directors to authorize the issuance of shares of preferred stock and to determine the price and other terms of those shares, including voting or other rights or preferences, without stockholder approval, which could be used to significantly dilute the ownership of a hostile acquiror;

the ability of our board of directors to alter our amended and restated bylaws without obtaining stockholder approval;

the required approval of at least 66 2/3% of the shares entitled to vote at an election of directors to adopt, amend or repeal our amended and restated bylaws or repeal the provisions of our amended and restated certificate of incorporation regarding the election and removal of directors;


a prohibition on stockholder action by written consent, which forces stockholder action to be taken at an annual or special meeting of our stockholders;

the requirement that a special meeting of stockholders may be called only by the board of directors, which may delay the ability of our stockholders to force consideration of a proposal or to take action, including the removal of directors; and

advance notice procedures that stockholders must comply with in order to nominate candidates to our board of directors or to propose matters to be acted upon at a stockholders’ meeting, which may discourage or deter a potential acquiror from conducting a solicitation of proxies to elect the acquiror’s own slate of directors or otherwise attempting to obtain control of us.

We are also subject to the anti-takeover provisions contained in Section 203 of the Delaware General Corporation Law. Under Section 203, a corporation may not, in general, engage in a business combination with any holder of 15% or more of its capital stock unless the holder has held the stock for three years or, among other exceptions, the board of directors has approved the transaction.

As a California-domiciled public company, we are required to have a certain number of women and directors from underrepresented communities on our board of directors on certain timeframes, depending on the size of our board at the time.

Our success depends in part on our continued ability to attract, retain and motivate highly qualified individuals to our board of directors. As a public company headquartered in California, we were required to have three women and at least one director from an underrepresented community on our board of directors by the end of 2021 and two or three directors from an underrepresented community on our board of directors by the end of 2022, depending on the size of our board of directors at the time. We had one woman on our board of directors at the end of 2021, and we may be fined for failure to meet the California requirements. While we currently have two women and four directors from underrepresented communities on the board of directors, recruiting and retaining board members carries uncertainty, and failure to comply with these California requirements will result in financial penaltiespenalties.

Claims for indemnification by our directors and officers may reduce our available funds to satisfy successful third-party claims against us and may reduce the amount of money available to us.

Our amended and restated certificate of incorporation and amended and restated bylaws provide that we will indemnify our directors and officers, in each case to the fullest extent permitted by Delaware law.

In addition, as permitted by Section 145 of the Delaware General Corporation Law, our amended and restated bylaws and our indemnification agreements that we have entered into with our directors and officers provide that:

we will indemnify our directors and officers for serving us in those capacities or for serving other business enterprises at our request, to the fullest extent permitted by Delaware law. Delaware law provides that a corporation may indemnify such person if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the registrant and, with respect to any criminal proceeding, had no reasonable cause to believe such person’s conduct was unlawful;
we may, in our discretion, indemnify employees and agents in those circumstances where indemnification is permitted by applicable law;

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we are required to advance expenses, as incurred, to our directors and officers in connection with defending a proceeding, except that such directors or officers shall undertake to repay such advances if it is ultimately determined that such person is not entitled to indemnification;
we are not obligated pursuant to our amended and restated bylaws to indemnify a person with respect to proceedings initiated by that person against us or our other indemnitees, except with respect to proceedings authorized by our board of directors or brought to enforce a right to indemnification;
the rights conferred in our amended and restated bylaws are not exclusive, and we are authorized to enter into indemnification agreements with our directors, officers, employees and agents and to obtain insurance to indemnify such persons; and
we may not retroactively amend our amended and restated bylaw provisions to reduce our indemnification obligations to directors, officers, employees and agents.

we will indemnify our directors and officers for serving us in those capacities or for serving other business enterprises at our request, to the fullest extent permitted by Delaware law. Delaware law provides that a corporation may indemnify such person if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the registrant and, with respect to any criminal proceeding, had no reasonable cause to believe such person’s conduct was unlawful;

we may, in our discretion, indemnify employees and agents in those circumstances where indemnification is permitted by applicable law;

we are required to advance expenses, as incurred, to our directors and officers in connection with defending a proceeding, except that such directors or officers shall undertake to repay such advances if it is ultimately determined that such person is not entitled to indemnification;

we are not obligated pursuant to our amended and restated bylaws to indemnify a person with respect to proceedings initiated by that person against us or our other indemnitees, except with respect to proceedings authorized by our board of directors or brought to enforce a right to indemnification;


the rights conferred in our amended and restated bylaws are not exclusive, and we are authorized to enter into indemnification agreements with our directors, officers, employees and agents and to obtain insurance to indemnify such persons; and

we may not retroactively amend our amended and restated bylaw provisions to reduce our indemnification obligations to directors, officers, employees and agents.

While we maintain a directors’ and officers’ insurance policy, such insurance may not be adequate to cover all liabilities that we may incur, which may reduce our available funds to satisfy third-party claims and may adversely impact our cash position.

Our amended and restated certificate of incorporation and amended and restated bylaws provide that the Court of Chancery of the State of Delaware is the exclusive forum for certain disputes between us and our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers or employees.

Our amended and restated certificate of incorporation and amended and restated bylaws provide that the Court of Chancery of the State of Delaware (or, in the event that the Court of Chancery does not have jurisdiction, the federal district court for the District of Delaware or other state courts of the State of Delaware) is the exclusive forum for any derivative action or proceeding brought on our behalf, any action asserting a claim of breach of fiduciary duty, any action asserting a claim against us arising pursuant to the Delaware General Corporation Law, our amended and restated certificate of incorporation or our amended and restated bylaws, or any action asserting a claim against us that is governed by the internal affairs doctrine; provided that, the exclusive forum provision will not apply to suits brought to enforce any liability or duty created by the Exchange Act or any other claim for which the federal courts have exclusive jurisdiction; and provided further that, if and only if the Court of Chancery of the State of Delaware dismisses any such action for lack of subject matter jurisdiction, such action may be brought in another state or federal court sitting in the State of Delaware. Our amended and restated certificate of incorporation and amended and restated bylaws also provide that the federal district courts of the United States of America are the exclusive forum for the resolution of any complaint asserting a cause of action against us or any of our directors, officers, employees or agents and arising under the Securities Act. Nothing in our amended and restated certificate of incorporation and amended and restated bylaws precludes stockholders that assert claims under the Exchange Act from bringing such claims in state or federal court, subject to applicable law.

This choice of forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or any of our directors, officers, other employees or stockholders, which may discourage lawsuits with respect to such claims, although our stockholders will not be deemed to have waived our compliance with federal securities laws and the rules and regulations thereunder. Furthermore, the enforceability of similar choice of forum provisions in other companies’ certificates of incorporation has been challenged in legal proceedings, and it is possible that a court could find these types of provisions to be inapplicable or unenforceable. While the Delaware courts have determined that such choice of forum provisions are facially valid, a stockholder may nevertheless seek to bring a claim in a venue other than those designated in the exclusive forum provisions, and there can be no assurance that such provisions will be enforced by a court in those other jurisdictions. If a court were to find the choice of forum provision that will be contained in our amended and restated certificate of incorporation and amended and restated bylaws to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving such action in other jurisdictions, which could adversely affect our business and financial condition.

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We do not currently intend to pay dividends on our common stock, and, consequently, your ability to achieve a return on your investment will depend on appreciation in the price of our common stock.

We do not currently intend to pay any cash dividends on our common stock for the foreseeable future. We currently intend to invest our future earnings, if any, to fund our growth. Therefore, you are not likely to receive any dividends on your common stock for the foreseeable future. Since we do not intend to pay dividends, your ability to receive a return on your investment will depend on any future appreciation in the market value of our common stock. There is no guarantee that our common stock will appreciate or even maintain the price at which our holders have purchased it.


General Risk Factors

We may not be able to protect our intellectual property rights throughout the world.

Filing, prosecuting and defending patents on product candidates in all countries throughout the world would be prohibitively expensive, and the laws 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 may not be able to prevent third parties from practicing our inventions in all countries outside the United States, or from selling or importing products made using our 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 otherwise infringing products to territories where we have patent protection, but enforcement is not as strong as that in the United States. These products may compete with any future products we may sell, and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in 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 pharmaceuticals and biopharmaceuticals, which could make it difficult for us to stop the infringement of our patents or marketing of competing products in violation of our proprietary rights generally. Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.

Changes in tax laws and regulations may have a material adverse effect on our business, financial condition and results of operations.

New income, sales, use or other tax laws, statutes, rules, regulations or ordinances could be enacted at any time, which could affect the tax treatment of any of our future domestic and foreign earnings. Any new taxes could adversely affect our domestic and international business operations, and our business and financial performance. Further, existing tax laws, statutes, rules, regulations or ordinances could be interpreted, changed, modified or applied adversely to us. Generally, future changes in applicable U.S. and non-U.S. tax laws and regulations, or their interpretation and application, could have an adverse effect on our business, financial conditions and results of operations. We are unable to predict whether such changes will occur and, if so, the ultimate impact on our business.

We are subject to U.S. and certain foreign export and import controls, sanctions, embargoes, anti-corruption laws, and anti-money laundering laws and regulations. Compliance with these legal standards could impair our ability to compete in domestic and international markets. We can face criminal liability and other serious consequences for violations, which can harm our business.

We are subject to export control and import laws and regulations, including the U.S. Export Administration Regulations, U.S. Customs regulations, various economic and trade sanctions regulations administered by the U.S. Treasury Department’s Office of Foreign Assets Controls, the U.S. Foreign Corrupt Practices Act of 1977, as amended, or FCPA, the U.S. domestic bribery statute contained in 18 U.S.C. § 201, the U.S. Travel Act, the USA PATRIOT Act, and other state and national anti-bribery and anti-money laundering laws in the countries in which we conduct

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activities. Anti-corruption laws are interpreted broadly and prohibit companies and their employees, agents, contractors and other collaborators from authorizing, promising, offering or providing, directly or indirectly, improper payments or anything else of value to recipients in the public or private sector. We may engage third parties to sell our products outside the United States, to conduct clinical trials and/or to obtain necessary permits, licenses, patent registrations and other regulatory approvals. We have direct or indirect interactions with officials and employees of government agencies or government-affiliated hospitals, universities and other organizations. We can be held liable for the corrupt or other illegal activities of our employees, agents, contractors and other collaborators, even if we do not explicitly authorize or have actual knowledge of such activities. Any violations of the laws and regulations described above may result in substantial civil and criminal fines and penalties, imprisonment, the loss of export or


import privileges, debarment, tax reassessments, breach of contract and fraud litigation, reputational harm and other consequences.

Significant disruptions of informationInformation technology systems,system failures, security breaches, of data security and other incidentscyberattacks, or deficiencies in our cybersecurity could materially adversely affect our business, results of operations and financial condition.

We collect and maintain information in digital and other forms that is necessary to conduct our business, and we are increasingly dependent on information technology systems and infrastructure to operate our business. In the ordinary course of our business, we collect, store and transmit large amounts of confidential information, including intellectual property, proprietary business information and personal information. It is critical that we do so in a secure manner to maintain the privacy, security, confidentiality and integrity of such confidential information. We have established physical, electronic and organizational measures designed to safeguard and secure our systems to prevent a data compromise, and rely on commercially available systems, software, tools and monitoring to provide security for our information technology systems and the processing, transmission and storage of digital information. We have also outsourced elements of our information technology infrastructure, and as a result a number of third-party vendors may have access to our confidential information. Our internal information technology systems and infrastructure, and those of any future collaborators and our contractors, consultants, vendors and other third parties on which we rely, are vulnerable to attack, damage or unauthorized access or use resultingand interruption from computer viruses, malware (e.g., ransomware), natural disasters, terrorism, war, telecommunication and electrical failures, cyber-attacks or cyber-intrusions over the Internet,cyberattacks, denial or degradation of service attacks, ransomware, hacking, sophisticated nation-state and nation-state supported actors, phishing and other social engineering attacks, attachments to emails, fraud, employee theft or misuse, and unauthorized access or use by persons inside our organization or persons with access to systems inside our organization.

The risk of a security breach or disruption, particularly through cyber-attacks or cyber intrusion,cyberattacks, including by computer hackers, foreign governments and cyber terrorists, has generally increased as the number, intensity and sophistication of attempted attacks and intrusions from around the world have increased. The prevalent use of mobile devices that access confidential information also increases the risk of lost or stolen devices, security incidents and data security breaches, which could lead to the loss of confidential information or other intellectual property. Attacks upon information technology systems are increasing in their frequency, levels of persistence, sophistication and intensity, and are being conducted by sophisticated and organized groups and individuals with a wide range of motives and expertise. As a result of the COVID-19 pandemic, we may also face increased risks of a security breach or disruption due to our reliance on internet technology and the number of our employees who are working remotely, which may create additional opportunities for cybercriminalscyber criminals to exploit vulnerabilities. Furthermore, because the techniques used to obtain unauthorized access to, or to sabotage, systems change frequently and often are not recognized until launched against a target, we may be unable to anticipate these techniques or implement adequate preventative measures. We may also experience security breaches that may remain undetected for an extended period. Even if identified, we may be unable to adequately investigate or remediate incidents or breaches due to attackers increasingly using tools and techniques that are designed to circumvent controls, to avoid detection, and to remove or obfuscate forensic evidence.

The costs to us to investigate, mitigate and remediate security incidents, breaches, disruptions, network security problems, bugs, viruses, worms, malicious software programs and security vulnerabilities could be significant, and while we have implemented security measures to protect our data security and information technology systems, our efforts to address these problems may not be successful, and these problems could result in unexpected interruptions, delays, cessation of service, negative publicity and other harm to our business and our competitive position. We and certain of our service providers are from time to time, subject to cyberattacks and security incidents. While we do not believe that we have experienced any significant system failure, accident or security breach to date, if such an event were to occur and cause interruptions in our operations or our critical third parties’ operations, it could result in a material disruption of our product development programs, and ultimately, our financial results. For example, the loss of clinical trial data from completed or ongoing or planned clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. The costs to us to investigate, mitigate and remediate security incidents, breaches, disruptions, network security problems, bugs, viruses, worms, malicious software programs and security vulnerabilities could be significant, and while we have implemented

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security measures to protect our data security and information technology systems, our efforts to address these problems may not be successful, and these problems could result in unexpected interruptions, delays, cessation of service, negative publicity and other harm to our business and our competitive position. Any security compromise affecting us, our partners or our industry, whether real or perceived, could harm our reputation, erode confidence in the effectiveness of our security measures and lead to regulatory scrutiny. Moreover, if a computer security breach affects our systems or results in the unauthorized access to or unauthorized use, disclosure, release or other processing of personal information or clinical trial data, it may be necessary to notify individuals, governmental authorities, supervisory bodies, the media and other parties pursuant to privacy and security laws, and our reputation could be materially damaged. We would also be exposed to a risk of loss, governmental investigations or enforcement, or


litigation and potential liability, which could materially adversely affect our business, results of operations and financial condition. We maintain cyber liability insurance; however, this insurance may not be sufficient to cover the financial, legal, business or reputational losses that may result from an interruption or breach of our systems.

Actual or perceived failure to comply with applicable data protection laws, regulations, standards and other requirements could lead to government enforcement actions and civil or criminal penalties, private litigation or adverse publicity and could negatively affect our operating results of operations and business.

We and our current and future collaborators are or may become subject to federal, state and foreign data protection laws and regulations governing data privacy and security. In the United States, numerous federal and state laws and regulations, including data breach notification laws, health information privacy laws and consumer protection laws, including Section 5 of the Federal Trade Commission Act, which govern the collection, use, disclosure and protection of health-related and other personal information, may apply to our operations and the operations of current and future collaborators.

In the United States, HIPAA,the Health Insurance Portability and Accountability Act of 1996, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 and its implementing regulations, or collectively, HIPAA, imposes, among other things, certain standards relating to the privacy, security, transmission and breach reporting of individually identifiable health information. Most healthcare providers, including research institutions from which we obtain patient health information, are subject to privacy and security regulations promulgated under HIPAA. We do not believe that we are currently acting as a covered entity or business associate under HIPAA and thus are not directly subject to its requirements or penalties. Depending on the facts and circumstances, however, we could be subject to significant administrative, civil and criminal penalties if we 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.

Further, various states have implemented similar privacy laws and regulations. For example, the California Consumer Privacy Act of 2018, or the CCPA, went into effect on January 1, 2020. The CCPA gives California residents expanded rights to access and delete their personal information, opt out of certain personal information sharing and receive detailed information about how their personal information is used. It also provides for civil penalties for violations, as well as a private right of action for data breaches that is expected to increase data breach litigation. The CCPA may increase our compliance costs and potential liability. Further, the California Privacy Rights Act, or the CPRA, recently passed in California. The CPRACalifornia and it significantly amends the CCPA and will imposeCCPA. The CPRA imposes additional data protection obligations on covered businesses, including additional consumer rights processes, limitations on data uses, new audit requirements for higher risk data, and opt outs for certain uses of sensitive data. It will also createcreates a new California data protection agency authorized to issue substantive regulations and could result in increased privacy and information security enforcement. The majority of the provisions will gowent into effect on January 1, 2023, and additional compliance investment and potential business process changes may be required. Many similar privacySimilar laws have passed in Virginia, Colorado, Connecticut, Utah, and have been proposed in other states and at the federal level, andreflecting a trend toward more stringent privacy legislation in other states.the United States. The enactment of such laws could have potentially conflicting requirements that would make compliance challenging.

Foreign data protection laws, including the European Union General Data Protection Regulation, or the GDPR, may also apply to health-related and other personal data of data subjects in the European Economic Area, or EEA. The GDPR went into effect on May 25, 2018, and companies that must comply with the GDPR face increased compliance obligations and risk, including robust regulatory enforcement of data protection requirements as well as potential fines for noncompliance of up to €20 million or 4% of annual global revenue of the noncompliance company, whichever is greater. The GDPR imposes numerous requirements for the collection, use, storage and disclosure of

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personal data of EEA data subjects, including requirements relating to providing notice to and obtaining consent from data subjects, personal data breach notification, cross-border transfers of personal information,data, and honoring and providing for the rights of EEA individuals in relation to their personal information,data, including the right to access, correct and delete their data. Among other requirements, the GDPR regulates transfers of personal data subject to the GDPR to third countries that have not been found to provide adequate protection to such personal data, including the United States, and the efficacy and longevity of current transfer mechanisms between the EU and the United States remains uncertain. For example, in 2016, the EU and United States agreed to a transfer framework for data transferred from the EU to the United States, called the Privacy Shield, but the Court of Justice of the EU, or the CJEU, invalidated the Privacy Shield in July 2020 and imposed further restrictions on use of the standard contractual clauses, or SCCs. These restrictions includeIn March 2022, the EU and the United States announced a requirementnew regulatory regime intended to replace the invalidated regulations; however, this new EU-US Data Privacy Framework has not been implemented beyond an executive order signed by President Biden on October 7, 2022 on Enhancing Safeguards for companiesUntied States Signals Intelligence Activities. European court and regulatory decisions subsequent to carry out a transfer impact assessment which, among other things, assesses the laws governing access to personal data in the recipient country and considers whether supplementary measures that provide privacy protections additional to those provided under SCCs will need to be implemented to ensure an essentially equivalent level of data protection to that afforded in the


EEA. The European Commission issued revised SCCs on June 4, 2021 to account for theCJEU decision of the CJEU and recommendations made by the European Data Protection Board. The revised SCCs must be used for relevant newJuly 16, 2020 have taken a restrictive approach to international data transfers from September 27, 2021; existing standard contractual clauses arrangements must be migrated to the revised clauses by December 27, 2022. The new SCCs apply only to the transfer of personal data outside of the EEA and not the UK; the UK’s Information Commissioner’s Office launched a public consultation on its draft revised data transfers mechanisms in August 2021 and laid its proposal before Parliament, with the UK SCCs expected to come into force in March 2022, with a two-year grace period. There is some uncertainty around whether the revised clauses can be used for all types of data transfers, particularly whether they can be relied on for data transfers to non-EEA entities subject to the GDPR.transfers. As supervisory authorities issue further guidance on personal data export mechanisms, including circumstances where the SCCs cannot be used, and/or start taking enforcement action, we could suffer additional costs, complaints and/or regulatory investigations or fines, and/or if we are otherwise unable to transfer personal data between and among countries and regions in which we operate, it could affect the manner in which we provide our services, the geographical location or segregation of our relevant systems and operations, and could adversely affect our financial results.

Further, from January 1, 2021, companies have had to comply with the GDPR and also the United Kingdom GDPR, or the UK GDPR, which, together with the amended UK Data Protection Act 2018, retains the GDPR in United Kingdom, or UK, national law. The UK GDPR mirrors the fines under the GDPR, i.e., fines up to the greater of €20 million (£17.5 million) or 4% of global turnover. As we continue to expand into other foreign countries and jurisdictions, we may be subject to additional laws and regulations that may affect how we conduct business.

The relationship betweenEU has also proposed a Regulation on Privacy and Electronic Communications, or ePrivacy Regulation, which, if adopted, would impose new obligations on the use of personal data in the context of electronic communications, particularly with respect to online tracking technologies and direct marketing. Additionally, the EU adopted the EU Clinical Trials Regulation, which came into effect on January 31, 2022. This regulation imposes new obligations on the use of data generated from clinical trials and enables European patients to have the opportunity to access information about clinical trials. Failure or perceived failure to comply with the GDPR, the UK andGDPR, the ePrivacy Regulation, the EU Clinical Trials Regulations, and other countries’ privacy or data security-related laws, rules or regulations could result in relationsignificant regulatory penalties and fines, and affect our compliance with contracts entered into with our partners, collaborators and other third parties.

Moreover, clinical trial subjects about whom we or any of our potential collaborators obtain information, as well as the providers who share this information with us, may contractually limit our ability to certain aspects of data protection law remains unclear,use and it is unclear how UKdisclose the information. Claims that we have violated individuals’ privacy rights, failed to comply with data protection laws or breached our contractual obligations, even if we are not found liable, could be expensive and regulations will developtime consuming to defend and could result in the medium to longer term,adverse publicity that could materially and how data transfers toadversely affect our business, financial condition, results of operations and from the United Kingdom will be regulated in the long term. The European Commission has adopted an adequacy decision in favor of the United Kingdom, enabling data transfers from EU member states to the United Kingdom without additional safeguards. However, the UK adequacy decision will automatically expire in June 2025 unless the European Commission re-assesses and renews or extends that decision.prospects.

Although we work to comply with applicable laws, regulations and standards, our contractual obligations and other legal obligations, these requirements are evolving and may be modified, interpreted and applied in an inconsistent manner from one jurisdiction to another, and may conflict with one another or other legal obligations with which we must comply. Compliance with these data protection laws and regulations could require us to take on more onerous obligations in our contracts, require us to engage in costly compliance exercises, restrict our ability to collect, use and disclose data, or in some cases, impact our or our partners’ or suppliers’ ability to operate in certain jurisdictions. Any actual or perceived failure to comply by us or our employees, representatives, contractors, consultants, collaborators, or other third parties could result in government investigations and/or enforcement actions, fines, civil or criminal penalties, private litigation or adverse publicity and could negatively affect our operating results and business.

Moreover, clinical trial subjects about whom we or any of our potential collaborators obtain information, as well as the providers who share this information with us, may contractually limit our ability to use and disclose the information. Claims that we have violated individuals’ privacy rights, failed to comply with data protection laws or breached our contractual obligations, even if we are not found liable, could be expensive and time consuming to defend and could result in adverse publicity that could materially and adversely affect our business, financial condition, results of operations and prospects.business.

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If securities or industry analysts do not publish research or reports about our business, or if they issue an adverse or misleading opinion regarding our stock, our stock price and trading volume could decline.

The trading market for our common stock is influenced by the research and reports that industry or securities analysts publish about us or our business. If any of the analysts who cover us issue an adverse or misleading opinion regarding us, our business model, our intellectual property or our stock performance, or if our clinical trials and operating results of operations fail to meet the expectations of analysts, 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, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.


We may be subject to securities litigation, which is expensive and could divert our management’s attention.

In the past, companies that have experienced volatility in the market price of their securities have been subject to securities class action litigation. We may be the target of this type of litigation in the future. Regardless of the merits or the ultimate results of such litigation, securities litigation brought against us could result in substantial costs and divert our management’s attention from other business concerns.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

Our corporate headquarters are located in Brisbane, California, where we lease approximately 65,818 square feet of office and laboratory space. The contractual term of the Brisbane lease commenced in November 2021 and will end in October 2031, with an option to extend for an additional ten years. Concurrent with the execution of the Brisbane lease agreement, we entered into an agreement to terminate our existing lease for our current corporate headquarters in South San Francisco effective upon the commencement of the Brisbane lease. We believe that our existing facilities are sufficient for our near-term needs.

We are not currently a party to any material legal proceedings. We may, however, in the ordinary course of business face various claims brought by third parties, and we may, from time to time, make claims or take legal actions to assert our rights, including intellectual property rights as well as claims relating to employment matters and the safety or efficacy of our products. Any of these claims could subject us to costly litigation, and, while we generally believe that we have adequate insurance to cover many different types of liabilities, our insurance carriers may deny coverage, may be inadequately capitalized to pay on valid claims, or our policy limits may be inadequate to fully satisfy any damage awards or settlements. If this were to happen, the payment of any such awards could have a material adverse effect on our business, results of operations and financial condition. Additionally, any such claims, whether or not successful, could damage our reputation and business.

Item 4. Mine Safety Disclosures.

None.


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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information for Common Stock

Our common stock has been traded on the Nasdaq Global Select Market under the symbol “ANNX” since July 24, 2020. Prior to that, there was no public market for our common stock.

Stockholders

As of February 18, 2022,March 1, 2023, there were 5127 holders of record of our common stock. The actual number of stockholders is greater than this number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividend Policy

We have never declared or paid, and do not anticipate declaring or paying in the foreseeable future, any cash dividends on our capital stock. Any future determination as to the declaration and payment of dividends, if any, will be at the discretion of our board of directors, subject to applicable laws and will depend on then existing conditions, including our financial condition, operating results, contractual restrictions, capital requirements, business prospects, and other factors our board of directors may deem relevant.

Securities Authorized for Issuance under Equity Compensation Plans

See the section titled “Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters” for information regarding securities authorized for issuance.

Recent Sales of Unregistered Securities

None.

Use of Proceeds from Public Offering of Common Stock

On July 23, 2020, our registration statement on Form S-1, as amended (Registration No. 333-239647), was declared effective in connection with our initial public offering. As of December 31, 2021,2022, all of the proceeds from the initial public offering have been applied as described in our final prospectus filed with the SEC pursuant to Rule 424(b) of the Securities Act and other periodic reports previously filed with the SEC.

Purchases of Equity Securities by the Issuer and Affiliated Parties

None.

Item 6. [Reserved]

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

You should read the following discussion and analysis of our financial condition and results of operations in conjunction with our consolidated financial statements and the related notes and other financial information included elsewhere in this Annual Report on Form 10-K.

In addition to historical financial information, the following discussion contains forward-looking statements that reflect our plans, estimates, beliefs, and expectations, and involve risks and uncertainties. Factors that could cause or contribute to these differences include those discussed below and elsewhere in this Annual Report on Form 10-K, particularly in the sections titled “Special Note Regarding Forward-Looking Statements” and “Risk Factors.”

Overview

We are a clinical-stage biopharmaceutical company pioneering a new class of complement medicines designed to stop thefor patients with classical complement pathway at its start, C1q, in order to bring therapies to patients suffering from serious complement-mediated autoimmune, neurodegenerative and ophthalmic disorders. C1q, the initiating molecule of theThe classical complement pathway is a core component to the body’s immune system that activates a powerful inflammatory cascade. We believe that by stopping the classical complement pathway at its start by targeting C1q, the initiating molecule of the classical complement pathway, our approach may have the potential to provide more complete protection against complement-mediated disorders of the body, brain and eye.

OurUsing our proprietary platform, leverages well-researched classical complement-mediated autoimmunewe are identifying and neurodegenerative disease processes, both of which are triggered by aberrant activation of C1q. Evidence suggests that potent and selective inhibition of C1q can prevent tissue damage triggered in antibody-mediated autoimmune disease and preserve loss of functioning synapses associated with cognitive and functional decline in complement-mediated neurodegeneration. By taking an upstream complement approach targeting C1q, our treatments are designed to act as an “on/off switch” to block all downstream componentscharacterizing the role of the classical complement pathway in three therapeutic areas—autoimmune, neurodegeneration and ophthalmology. In so doing, we are advancing a broad pipeline of product candidates designed to block the early classical cascade and all downstream pathway components and their tissue-damaging functions. Our goal is to suppress excessive or aberrant classical complement activity that leadcontributes to excesschronic inflammation and tissue damage and patient disability in a host of complement-mediated disorders,to slow or even halt disease progression, while preserving the normalbeneficial immune functionfunctions of the lectin and alternative complement pathways involved in the clearance of pathogens and damaged cells. We have demonstrated robust target engagement in the body, brain and eye, and clinical proof of concept in multiple diseases, resulting in four flagship programs that we are actively advancing:

Guillain-Barré Syndrome, or GBS: We are advancing a broad pipeline of product candidates designed to block the activity of C1q and the entire classical complement pathway for a range of complement-mediated diseases. Our development strategy is focused on areas where C1q and the classical complement pathway is the key driver of disease. Our pipeline includes three clinical-stage assets across three therapeutic franchises:

Autoimmune. We are advancing our lead candidate, ANX005, an investigational, full-length monoclonal antibody formulated for intravenous administration for several autoimmune indications. ANX005 is currently being evaluated in a Phase 2/3 clinical trial for the potential treatment of patients with Guillain-Barré Syndrome (GBS) with data anticipated in 2023 and a Phase 2 trial in patients with warm autoimmune hemolytic anemia (wAIHA) with data anticipated in the second half of 2022. Our ANX009 clinical candidate is a subcutaneous formulation of an antigen-binding fragment, or Fab. ANX009 has been evaluated in a Phase 1 trial and based on the data from this trial, we plan to advance ANX009 into a Phase 1b trial in patients with lupus nephritis (LN) with initial data expected in the second half of 2022.

Neurodegeneration. We are also developing ANX005 for the potential treatment of neurodegenerative indications . ANX005 is currently being evaluated in Phase 2 trials in Huntington’s disease (HD) and amyotrophic lateral sclerosis (ALS). Interim data from the HD trial showed improvements in clinical measures and that ANX005 had been generally well tolerated. We plan to present the full data from our HD trial in the second quarter of 2022. Data from Phase 2 trial of ANX005 in patients with ALS is expected to be reported in 2023.


Ophthalmology. Our ANX007 program is a Fab formulated for intravitreal administration for the potential treatment of neurodegenerative diseases of the eye. We are currently conducting a Phase 2 trial in patients with geographic atrophy (GA) with data expected in 2023.

Beyond our clinical-stage assets, our preclinical portfolio of next generation product candidates includes ANX105, an investigational, full-length monoclonal antibody, targeting neurodegenerative indications, and ANX1502, an investigational oral small moleculeor mAb, formulated for intravenous administration in developmenta pivotal Phase 3 clinical trial for the potential treatment of certainpatients with GBS. GBS is a rare antibody-mediated autoimmune indications. Based on learnings from our initial trialsdisease with no U.S. Food and our expertise in the roleDrug Administration, or FDA, approved therapies, and for which we believe maximum suppression of C1q and the classical complement pathway,cascade early in the disease process may act to rapidly prevent nerve damage and irreversible neurological disability. We demonstrated clinical proof-of-concept in a prior placebo-controlled trial and expect to complete enrollment of approximately 220 patients in our ongoing Phase 3 GBS trial in the second half of 2023, with data anticipated in the first half of 2024.

Huntington’s Disease, or HD: We are evaluating ANX005 for the potential treatment of patients with HD, a slowly progressing, inherited and fatal neurodegenerative disease in which we believe C1q triggers synapse loss and neuroinflammation. We completed a Phase 2 clinical trial in patients with manifest HD in 2022, in which ANX005 demonstrated positive efficacy results and was generally well-tolerated. Based on the Phase 2 results and a productive engagement with the FDA in late 2022, we are preparing to advance ANX005 into a randomized, double-blind, placebo-controlled Phase 2/3 trial for patients with HD in 2023.
Geographic Atrophy, or GA: We are evaluating additional orphanANX007, an antigen-binding fragment, or Fab, formulated for intravitreal administration, for the potential treatment of patients with GA, the leading cause of blindness resulting from damaged and large market indications that are driven by aberrant ordying retinal cells. ANX007 is designed to block C1q locally in the eye to provide more complete protection against excess classical complement activation.

activity, a key driver of disease. We hold worldwidecompleted enrollment of approximately 270 patients in our ongoing Phase 2 GA trial in early 2022. We expect to report data from the 12-month treatment-period of the Phase 2 trial in mid-2023, followed by additional data after the conclusion of the six-month off-treatment period by the end of 2023.

97


ANX1502 for Autoimmune Indications: ANX1502 is a novel oral small molecule targeting classical complement, which we believe is first-in-kind. We are conducting an ongoing Phase 1 single-ascending dose, or SAD, and multiple-ascending dose, or MAD, clinical trial designed to evaluate the safety, tolerability, pharmacokinetics, or PK, and pharmacodynamics, or PD, of ANX1502 in healthy volunteers. In the SAD trial, a single dose of 450 mg has achieved target drug levels in plasma in patients, consistent with twice-daily dosing. Additionally, ANX1502 has been generally well-tolerated as of October 23, 2022. The SAD trial is ongoing to identify the maximum tolerated dose. We are preparing to initiate a proof-of-concept trial in patients with cold agglutinin disease, or CAD, in 2023, which is supported by positive data previously generated by ANX005 in CAD patients. We also plan to expand development into additional autoimmune indications with strong scientific rationale, including multifocal motor neuropathy, or MMN, in the first half of 2024.

In addition to our flagship programs, we are studying multiple programs across our three therapeutic franchise areas, including:

Amyotrophic Lateral Sclerosis, or ALS: We are evaluating ANX005 in a Phase 2a signal-finding clinical trial in patients with ALS, a fatal neurodegenerative disorder characterized by C1q activation driving inflammation and commercialization rights, including through exclusive licenses,neurodegeneration. Preliminary Phase 2a data as of December 6, 2022 from the first eight patients in the trial showed that treatment with ANX005 resulted in a reduction in neurofilament light, or NfL, a neurodegenerative disease biomarker, and slowed disease progression as measured by reductions in revised ALS functional rating scores during the initial 12-week on-treatment period, followed by an increase in disease progression in the off-treatment period. Enrollment in the Phase 2a trial is ongoing, and we expect to allreport full data from the Phase 2a clinical trial in 2023.
Lupus Nephritis, or LN: We are advancing a Phase 1b signal-finding trial of our product candidates,ANX009, a C1q Fab formulated for subcutaneous delivery, using a precision medicine approach for patients with LN who have high baseline complement activity. LN is an autoimmune disease for which allows uspathogenic autoantibodies against C1q enhance activity and uniquely amplify kidney inflammation and damage. Enrollment in the Phase 1b clinical trial is ongoing with multiple patients dosed, and clinical data are expected in the first half of 2023.
ANX105: We are continuing to strategically maximize value from our product portfolio over time. Our patent portfolio includes patent protection for our upstream complement platformevaluate ANX105, a next-generation full-length mAb, in a Phase 1 SAD clinical trial in healthy volunteers. Enrollment is ongoing and each of our product candidates.

initial data are expected in 2023.

We were incorporated in March 2011 and commenced operations later that year. To date, we have focused primarily on performing research and development activities, hiring personnel and raising capital to support and expand these activities. We do not have any products approved for sale, and we have not generated any revenue from product sales. We have incurred net losses each year since our inception. Our net losses were $130.3$141.9 million and $63.4$130.3 million for the years ended December 31, 20212022 and 2020,2021, respectively. As of December 31, 2021,2022, we had an accumulated deficit of $296.3$438.3 million and cash and cash equivalents and short-term investments of $242.7 million.

Initial Public Offering

On July 28, 2020, we completed an initial public offering of our common stock on the Nasdaq Global Select Market, or the IPO. As part of the IPO, we issued and sold 14,750,000 shares of our common stock at a public offering price of $17.00 per share and 2,139,403 shares of our common stock to the underwriters of the IPO pursuant to the partial exercise of their option to purchase additional shares at a price of $17.00 per share less underwriting discounts and commissions. We received net proceeds of approximately $262.4 million from the IPO, after deducting underwriting discounts and commissions of $20.1 million and offering costs of $4.6 million.

Impact of COVID-19 Pandemic

The COVID-19 pandemic continues to rapidly evolve, and its ongoing impact is uncertain and subject to change. For instance, we have experienced interruption in clinical trial activities, shortages in clinical site staff, longer timelines for clinical site initiation and temporary shortages in lab kits and supplies. We will continue to monitor the COVID-19 pandemic situation closely. The extent of the impact of the COVID-19 pandemic on our clinical trials, business, financial condition, results of operations and clinical development timelines and plans remains uncertain, and will depend on, among other factors, the duration of the outbreak, the emergence of new variants, rates of infection in the locations in which we do business, restrictions that may be requested or mandated by governmental authorities, and the impact of the COVID-19 pandemic on our clinical trial enrollment, trial sites, contract research organizations, or CROs, third-party manufacturers, regulatory authorities and other third parties with whom we do business.

Components of Operating Results

Revenue

Our product candidates are not approved for commercial sale. We have not generated any revenue from sales of our product candidates and do not expect to do so in the foreseeable future and until we complete clinical development, submit regulatory filings and receive approvals from applicable regulatory bodies for such product candidates, if ever.


Operating Expenses

Research and Development

Research and development expenses account for a significant portion of our operating expenses. Research and development expenses consist primarily of direct and indirect costs incurred for the development of our product candidates.

98


Direct expenses include:

preclinical and clinical outside service costs associated with discovery, preclinical and clinical testing of our product candidates;
professional services agreements with third party contract organizations, investigative clinical trial sites and consultants that conduct research and development activities on our behalf;
contract manufacturing costs to produce clinical trial materials; and
laboratory supplies and materials.

preclinical and clinical outside service costs associated with discovery, preclinical and clinical testing of our product candidates;

professional services agreements with third party contract organizations, investigative clinical trial sites and consultants that conduct research and development activities on our behalf;

contract manufacturing costs to produce clinical trial materials; and

laboratory supplies and materials.

Indirect expenses include:

compensation and personnel-related expenses (including stock-based compensation);
allocated expenses for facilities and depreciation; and
other indirect costs.

compensation and personnel-related expenses (including stock-based compensation);

allocated expenses for facilities and depreciation; and

other indirect costs.

We record research and development expenses as incurred. Payments made to other entities are under agreements that are generally cancelable by us. Advance payments for goods or services to be received in future periods for use in research and development activities are deferred as prepaid expenses. The prepaid amounts are then expensed as the related services are performed. At this time, we cannot reasonably estimate or know the nature, timing and estimated costs of the efforts that will be necessary to complete the development of, and obtain regulatory approval for, any of our product candidates.

We expect our research and development expenses to increase substantially for the foreseeable future as we continue to invest in research and development activities related to developing our product candidates, particularly as they advance into later stages of development and as we conduct larger clinical trials, engage in other research and development activities and seek regulatory approvals for any product candidates that successfully complete clinical trials and as we incur expenses associated with hiring additional personnel and facility costs to support our research and development efforts. The process of conducting the necessary clinical research to obtain regulatory approval is costly and time-consuming, and the successful development of our product candidates is highly uncertain.

General and Administrative

General and administrative expenses consist primarily of compensation and personnel-related expenses (including stock-based compensation) for our personnel in executive, finance and other administrative functions. General and administrative expenses also include professional fees paid for accounting, legal and tax services, allocated expenses for facilities and depreciation and other general and administrative costs.

We expect our general and administrative expenses to increase substantially for the foreseeable future as we continue to support our research and development activities, grow our business and, if any of our product candidates receive marketing approval, commercialization activities. We will also incur additional expenses as a result of operating as a public company, including expenses related to compliance with the rules and regulations of the SEC, Sarbanes-Oxley Act and the Nasdaq Stock Market, additional insurance expenses, investor relations activities and other administrative and professional services. We also expect to increase the size of our administrative function to support the growth of our business.


Interest and Other Income, Net

Interest and other income, net, primarily consists of non-recurring income from research grants and interest income earned on our cash equivalents and short-term investments.

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Results of Operations

Comparison of the Years Ended December 31, 20212022 and 20202021

The following tables summarize our results of operations for the periods presented:

 

Year Ended

December 31,

 

 

 

 

 

Year Ended
December 31,

 

 

 

 

 

 

 

2021

 

 

2020

 

 

Dollar Change

 

 

% Change

 

 

2022

 

 

2021

 

 

Dollar
Change

 

 

%
Change

 

(in thousands)

 

 

 

 

 

 

 

 

 

 

(in thousands)

 

 

 

 

 

Operating expenses:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Research and development

 

$

100,066

 

 

$

49,271

 

 

$

50,795

 

 

103%

 

 

$

112,501

 

 

$

100,066

 

 

$

12,435

 

 

12%

General and administrative

 

 

30,647

 

 

 

14,198

 

 

 

16,449

 

 

116%

 

 

 

33,098

 

 

 

30,647

 

 

 

2,451

 

 

8%

Total operating expenses

 

 

130,713

 

 

 

63,469

 

 

 

67,244

 

 

106%

 

 

 

145,599

 

 

 

130,713

 

 

 

14,886

 

 

11%

Loss from operations

 

 

(130,713

)

 

 

(63,469

)

 

 

(67,244

)

 

106%

 

 

 

(145,599

)

 

 

(130,713

)

 

 

(14,886

)

 

11%

Interest and other income, net

 

 

390

 

 

 

57

 

 

 

333

 

 

*

 

 

 

3,652

 

 

 

390

 

 

 

3,262

 

 

*

Net loss

 

$

(130,323

)

 

$

(63,412

)

 

$

(66,911

)

 

106%

 

 

$

(141,947

)

 

$

(130,323

)

 

$

(11,624

)

 

9%

* Not meaningful

*

Not meaningful

Research and Development Expenses

 

Year Ended

December 31,

 

 

 

 

 

 

 

 

 

 

Year Ended
December 31,

 

 

 

 

 

 

 

2021

 

 

2020

 

 

Dollar Change

 

 

% Change

 

 

2022

 

 

2021

 

 

Dollar
Change

 

 

%
Change

 

(in thousands)

 

 

 

 

 

 

 

 

 

 

(in thousands)

 

 

 

 

 

Direct costs:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clinical and nonclinical outside services

 

$

42,380

 

 

$

18,712

 

 

$

23,668

 

 

126%

 

 

$

53,322

 

 

$

42,380

 

 

$

10,942

 

 

26%

Consulting and professional services

 

 

8,023

 

 

 

3,947

 

 

 

4,076

 

 

103%

 

 

 

7,416

 

 

 

8,023

 

 

 

(607

)

 

(8%)

Contract manufacturing

 

 

19,322

 

 

 

12,588

 

 

 

6,734

 

 

53%

 

 

 

15,108

 

 

 

19,322

 

 

 

(4,214

)

 

(22%)

Laboratory supplies and materials

 

 

1,104

 

 

 

726

 

 

 

378

 

 

52%

 

 

 

1,765

 

 

 

1,104

 

 

 

661

 

 

60%

Indirect costs:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compensation and personnel-related

(including stock-based compensation)

 

 

24,350

 

 

 

11,876

 

 

 

12,474

 

 

105%

 

 

 

29,625

 

 

 

24,350

 

 

 

5,275

 

 

22%

Facilities and depreciation

 

 

4,745

 

 

 

1,018

 

 

 

3,727

 

 

*

 

 

 

4,481

 

 

 

4,473

 

 

 

8

 

 

*

Other

 

 

142

 

 

 

404

 

 

 

(262

)

 

(65%)

 

 

 

784

 

 

 

414

 

 

 

370

 

 

89%

Total research and development expenses

 

$

100,066

 

 

$

49,271

 

 

$

50,795

 

 

103%

 

 

$

112,501

 

 

$

100,066

 

 

$

12,435

 

 

12%

* Not meaningful

100


*

Not meaningful


Research and development expenses increased by $50.8$12.4 million, or 103%12%, for the year ended December 31, 20212022 compared to the year ended December 31, 2020.2021. The increase was primarily due to an increase of $23.7$10.9 million in direct clinical outside services related to our multiple ongoing and planned clinical trials in GBS, warm autoimmune hemolytic anemia, Huntington’s Disease, amyotrophic lateral sclerosis, and geographic atrophy, as well as preclinical outside services to support pre-IND activities forand first in human trials of ANX105 and our small molecule program, ANX1502. Contract manufacturing expense increaseddecreased by $6.7$4.2 million relateddue to the productioncompletion of ANX005 ANX007, and ANX009 as well as pre-IND manufacturing activities for ANX105 and ANX1502.production runs in the prior year period. Compensation and personnel-related expenses increased by $12.5$5.3 million, including an increase of $6.3 million in stock-based compensation, due to an increase in headcount. Direct consulting and professional services costs increaseddecreased by $4.1$0.6 million due to timing of costs related to the support of multiple functions including clinical development, translational, regulatory and project management. Facilities and depreciation costsOther expenses increased by $3.7$0.4 million due to the commencement of our new office leaseincrease in Brisbane, California.third-party software costs.

General and Administrative Expenses

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Year Ended

December 31,

 

 

 

 

 

 

 

 

 

 

 

2021

 

 

2020

 

 

Dollar Change

 

 

% Change

 

 

 

(in thousands)

 

 

 

 

 

 

 

 

 

Consulting and professional services

 

$

13,726

 

 

$

7,350

 

 

 

6,376

 

 

87%

 

Compensation and personnel-related (including

   stock-based compensation)

 

 

13,567

 

 

 

5,715

 

 

 

7,852

 

 

137%

 

Facilities and depreciation

 

 

2,353

 

 

 

729

 

 

 

1,624

 

 

*

 

Other

 

 

1,001

 

 

 

404

 

 

 

597

 

 

148%

 

Total general and administrative expenses

 

$

30,647

 

 

$

14,198

 

 

$

16,449

 

 

116%

 

 

 

Year Ended
December 31,

 

 

 

 

 

 

 

 

2022

 

 

2021

 

 

Dollar
Change

 

 

%
Change

 

 

(in thousands)

 

 

 

 

 

 

Compensation and personnel-related
(including stock-based compensation)

 

$

17,189

 

 

$

13,726

 

 

$

3,463

 

 

25%

Consulting and professional services

 

 

12,219

 

 

 

13,567

 

 

 

(1,348

)

 

(10%)

Facilities and depreciation

 

 

1,984

 

 

 

2,101

 

 

 

(117

)

 

(6%)

Other

 

 

1,706

 

 

 

1,253

 

 

 

453

 

 

36%

Total general and administrative expenses

 

$

33,098

 

 

$

30,647

 

 

$

2,451

 

 

8%

*

Not meaningful

General and administrative expenses increased by $16.4$2.5 million, or 116%8%, for the year ended December 31, 20212022 compared to the year ended December 31, 2020.2021. The increase was primarily due to an increase of $7.9$3.5 million in compensation and personnel-related expenses, including an increase of $5.0$2.0 million in stock-based compensation, duerelated to an increase in headcount. Consulting and professional services for accounting, legal and audit fees, and directorsdirectors’ and officers’ liability insurance increaseddecreased by $6.4 million.$1.3 million during the year ended December 31, 2022. Facilities and depreciation costs increaseddecreased by $1.6$0.1 million due to the commencement ofsublease income offsetting rent expense associated with our new office leaseleased facility in Brisbane, California.California, which commenced in November 2021. Other expenses increased by $0.5 million due to increase in information technology costs.

Interest and other income, net

Interest and other income increased by $3.3 million for the year ended December 31, 2022 compared to the same period in 2021. The increase was primarily due to the increase in cash and cash equivalents and short-term investments balances, which was the result of the private placement completed in July 2022 and higher interest rates.

Liquidity and Capital Resources

Sources of Liquidity

Due to our significant research and development expenditures, we have generated operating losses since our inception.

We have funded our operations primarily through the sale of equity securities. From our inception through December 31, 2021,2022, we have raised net cash proceeds of $233.9$356.4 million from private placements of our redeemable convertible preferred stock, our common stock and warrants to purchase our common stock, and $262.4 million from the initial public offering of our common stock, or our IPO. As of December 31, 2021,2022, we had available cash and cash equivalents and short-term investments of $242.7 million and an accumulated deficit of $296.3$438.3 million.


101


Cash Flows

 

Year Ended

December 31,

 

 

Year Ended
December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

 

(in thousands)

 

 

(in thousands)

 

Net cash used in operating activities

 

$

(106,110

)

 

$

(53,087

)

 

$

(116,309

)

 

$

(106,110

)

Net cash used in investing activities

 

 

(88,236

)

 

 

(83,164

)

Net cash provided by (used in) investing activities

 

 

58,443

 

 

 

(88,236

)

Net cash provided by financing activities

 

 

1,795

 

 

 

360,876

 

 

 

122,908

 

 

 

1,795

 

(Decrease) increase in cash, cash equivalents and restricted cash

 

$

(192,551

)

 

$

224,625

 

Increase (decrease) in cash, cash equivalents and restricted cash

 

$

65,042

 

 

$

(192,551

)

Cash Flows from Operating Activities

Cash used in operating activities for the year ended December 31, 2022 was $116.3 million, which consisted of a net loss of $141.9 million, partially offset by $21.9 million in non-cash charges and a net change of $3.7 million in our operating assets and liabilities. The non-cash charges consisted of stock-based compensation of $18.5 million, depreciation and amortization of $2.1 million, accretion of discount on available-for-sale securities of $0.1 million, and reduction in the carrying amount of right-of-use assets of $1.2 million.

Cash used in operating activities for the year ended December 31, 2021 was $106.1 million, which consisted of a net loss of $130.3 million, partially offset by $20.9 million in non-cash charges and a net change of $3.3 million in our operating assets and liabilities. The non-cash charges consisted of stock-based compensation of $16.3 million, depreciation and amortization of $2.1 million, accretion of discount on available-for-sale securities of $1.3 million, and reduction in the carrying amount of right-of-use assets of $1.3 million.

Cash used in operatingFlows from Investing Activities

Cash provided by investing activities for the year ended December 31, 20202022 was $53.1$58.4 million, which consisted of a net loss$178.2 million of $63.4 million,proceeds from maturities of available-for-sale securities, partially offset by $5.6$113.2 million of purchases of available-for-sale securities and $6.5 million of tenant improvement costs associated with our lease in non-cash charges and a net change of $4.7 million in our net operating assets and liabilities. The non-cash charges consisted of stock-based compensation of $4.9 million and depreciation and amortization of $0.7 million.Brisbane, California.

Cash Flows from Investing Activities

Cash used in investing activities for the year ended December 31, 2021 was $88.2 million, which consisted of $225.6 million of purchases of available-for-sale securities and $1.7 million of purchase of property and equipment, partially offset by $133.0 million of proceeds from maturities of available-for-sale securities and $6.0 million of proceeds from sale of available-for-sale securities.

Cash used in investingFlows from Financing Activities

Cash provided by financing activities for the year ended December 31, 20202022 was $83.2$122.9 million, which consisted of $82.7$122.5 million of purchasesnet proceeds from issuance of available-for-sale securitiescommon stock and $0.5pre-funded warrants, and $0.4 million of purchasesproceeds from the exercise of propertycommon stock options and equipment.employee stock purchase plan purchases.

Cash Flows from Financing Activities

Cash provided by financing activities for the year ended December 31, 2021 was $1.8 million, related to $1.8 million of proceeds from the exercise of common stock options and employee stock purchase plan purchases.

Cash provided by financing activities for the year ended December 31, 2020 was $360.9 million, which consisted of the net proceeds of $262.4 million from the IPO, net of underwriting discounts and expenses, the net proceeds received from sale and issuance of our Series D redeemable convertible preferred stock of approximately $96.8 million, and proceeds of $0.5 million from the Paycheck Protection Program loan which was repaid in full.

Funding Requirements

We use our cash to fund operations, primarily to fund our clinical trials, research and development expenditures and related personnel costs. We expect our research and development expenses to increase substantially for the foreseeable future as we continue to invest in research and development activities related to our product candidates, particularly as they advance into later stages of development and as we conduct larger clinical trials, engage in other research and development activities, seek regulatory approvals for any product candidates that successfully complete clinical trials and as we incur expenses associated with hiring additional personnel to support our research and development efforts. In addition, we expect our general and administrative expenses to increase substantially for the

102


foreseeable future as we continue to support our research and development activities and to grow our business and as we expect to engage in commercialization activities, if any of our product candidates receive marketing approval. We


will also incur additional expenses as a result of operating as a public company and also expect to increase the size of our administrative function to support the growth of our business. The timing and amount of our operating expenditures will depend on many factors, including:

the scope, progress, results and costs of researching and developing our current product candidates or any other future product candidates we choose to pursue, and conducting preclinical studies and clinical trials;
the timing of, and the costs involved in, obtaining regulatory approvals for our lead product candidates or any future product candidates;
the number and characteristics of any additional product candidates we develop or acquire;
the timing and amount of any milestone, royalty and/or other payments we are required to make pursuant to our current or any future license or collaboration agreements;
the cost of manufacturing our lead product candidates or any future product candidates and any products we successfully commercialize;
the cost of building a sales force in anticipation of product commercialization;
the cost of commercialization activities of our product candidates, if approved for sale, including marketing, sales and distribution costs;
our ability to establish strategic collaborations, licensing or other arrangements and the financial terms of any such agreements, including the timing and amount of any future milestone, royalty or other payments due under any such agreement;
any product liability or other lawsuits related to our products;
the expenses needed to attract, hire and retain skilled personnel;
the costs associated with operating as a public company;
the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing our intellectual property portfolio; and
the timing, receipt and amount of sales of any future approved products.

the scope, progress, results and costs of researching and developing our current product candidates or any other future product candidates we choose to pursue, and conducting preclinical studies and clinical trials;

the timing of, and the costs involved in, obtaining regulatory approvals for our lead product candidates or any future product candidates;

the number and characteristics of any additional product candidates we develop or acquire;

the timing and amount of any milestone, royalty and/or other payments we are required to make pursuant to our current or any future license or collaboration agreements;

the cost of manufacturing our lead product candidates or any future product candidates and any products we successfully commercialize;

the cost of building a sales force in anticipation of product commercialization;

the cost of commercialization activities of our product candidates, if approved for sale, including marketing, sales and distribution costs;

our ability to establish strategic collaborations, licensing or other arrangements and the financial terms of any such agreements, including the timing and amount of any future milestone, royalty or other payments due under any such agreement;

any product liability or other lawsuits related to our products;

the expenses needed to attract, hire and retain skilled personnel;

the costs associated with operating as a public company;

the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing our intellectual property portfolio; and

the timing, receipt and amount of sales of any future approved products.

Based upon our current operating plan, we believe that our existing cash and cash equivalents will enable us to fund our operating expenses and capital expenditure requirements into the first quarter of 2024.2025. We have based this estimate on assumptions that may prove to be wrong, and we could utilize our available capital resources sooner than we expect. We expect to continue to expend significant resources for the foreseeable future. Until such time, if ever, as we can generate substantial product revenue, we will be required to seek additional funding in the future and currently intend to do so through public or private equity offerings or debt financings, credit or loan facilities, collaborations or a combination of one or more of these funding sources. Additional funds may not be available to us on acceptable terms or at all. If we fail to obtain necessary capital when needed on acceptable terms, or at all, we could be forced to delay, limit, reduce or terminate our product development programs, commercialization efforts or other operations. If we raise additional funds by issuing equity securities, our stockholders will suffer dilution and the terms of any financing may adversely affect the rights of our stockholders. In addition, as a condition to providing additional funds to us, future investors may demand, and may be granted, rights superior to those of existing stockholders. Debt financing, if available, is likely to involve restrictive covenants limiting our flexibility in conducting future business activities, and, in the event of insolvency, debt holders would be repaid before holders of our equity securities received any distribution of our corporate assets.

At-the-Market Offering

In August 2021, we entered into a sales agreement with Cowen and Company LLC, or Cowen, as sales agent, pursuant to which we may issue and sell shares of our common stock for an aggregate maximum offering price of $100.0 million under an at-the-market offering program, or 2021 ATM program. We will pay Cowen up to 3% of

103


gross proceeds for the common stock sold through the 2021 ATM program. As of December 31, 2021,2022, no shares of common stock havehad been sold under the 2021 ATM program. In February 2023, an entity related to one of our directors purchased 2,646,458 shares of common stock at a price of $6.80 per share through the 2021 ATM program, resulting in net proceeds to us of approximately $17.5 million, after deducting placement agent fees.


Private Placement

On July 11, 2022, we sold in a private placement an aggregate of 9,013,834 shares of common stock, pre-funded warrants to purchase up to 24,696,206 shares of our common stock and accompanying common warrants to purchase up to 8,427,508 shares of our common stock. The offering price per share and accompanying common warrant was $3.87125 per share and the offering price per pre-funded warrant and accompanying common warrant was $3.87025 per share, which equals the per share offering price for the shares of common stock less the $0.001 exercise price for each such pre-funded warrant. The pre-funded warrants remain exercisable until exercised in full. The common warrants have an exercise price of $5.806875 per share and expire on June 30, 2025. The private placement resulted in net proceeds of approximately $122.5 million, after deducting placement agent fees and other expenses.

Both the pre-funded and common warrants are immediately exercisable, subject to beneficial ownership limitations. The warrants meet the criteria for equity classification and were therefore recorded at fair value as of the grant date as a component of stockholders’ equity within additional paid-in capital.

As of December 31, 2022, no pre-funded or common warrants were exercised, and there were pre-funded and common warrants to purchase an aggregate of 33,123,714 shares of common stock outstanding. The 24,696,206 shares of common stock issuable upon the exercise of the pre-funded warrants and the 8,427,508 shares of common stock issuable upon the exercise of the common warrants are not included in the number of issued and outstanding shares of common stock as of December 31, 2022.

Off-Balance Sheet Arrangements

Since our inception, we have not engaged in any off-balance sheet arrangements, as defined in the rules and regulations of the SEC.

Critical Accounting Policies and Estimates

Management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these consolidated financial statements requires us to make estimates and assumptions for the reported amounts of assets, liabilities, expenses and related disclosures. Our estimates are based on our historical experience and on various other factors that we believe are 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. Actual results may differ from these estimates under different assumptions or conditions and any such differences may be material.

While our significant accounting policies are described in more detail in the notes to our consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K, we believe the following accounting policies are the most critical for fully understanding and evaluating our financial condition and results of operations.

Accrued and Prepaid Research and Development Costs

We estimate preclinical study and clinical trial expenses based on the services performed pursuant to contracts with research institutions, clinical research organizations, and clinical manufacturing organizations that conduct and manage preclinical studies and clinical trials on our behalf. In recording service fees as either prepaid or accrued costs, we estimate the period over which services will be performed and the level of effort to be expended in each period. These estimates of the expense are based on communications with and information provided by the third-party service providers at each balance sheet date. If the actual timing of the performance of services or the level of effort varies from the estimate, we will adjust the amounts recorded accordingly. The estimates are trued up to reflect the best

104


information available at the time of the financial statement issuance. We have not experienced any material differences between accrued or prepaid costs and actual costs incurred since inception.

We defer and capitalize non-refundable advance payments for goods or services that will be used or rendered for future research and development activities as prepaid expenses until the related goods are delivered or services are performed. We evaluate such payments for current or long-term classification based on when such services are expected to be received.

Operating Lease Obligations

We determine if an arrangement is a lease at inception. Upon adoption of Accounting Standards Codification 842, Leases, as of January 1, 2021, we include operating leases in operating lease right of use, or ROU, assets, current and noncurrent operating lease liabilities in our consolidated balance sheets. The ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. We measure our ROU assets based on the associated lease liabilities adjusted for any lease incentives such as tenant improvement allowances. As most of the leases do not provide an implicit rate, we generally use our incremental borrowing rate based on the estimated rate of interest for collateralized borrowing over a similar term of the lease payments at the commencement date. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise the option. Lease expense for lease payments is recognized on a straight-line basis over the lease term.

As a practical expedient, we elected, for all facility leases, not to separate non-lease components from lease components and instead to account for each separate lease component and its associated non-lease components as a single lease component. We elected to exclude from our balance sheets recognition of leases having a term of 12 months or less (short-term leases).


Warrants

Warrants are accounted for as either derivative liabilities or as equity instruments depending on the specific terms of the agreement. Our pre-funded and common warrants are equity-classified instruments that were recorded in additional paid-in capital at issuance and are not subject to remeasurement. We periodically evaluate changes in facts and circumstances that could impact the classification of warrants.

Stock-Based Compensation

We maintain a stock-based compensation plan as a long-term incentive for employees, non-employee directors and consultants. The plan allows for the issuance of incentive stock options, non-qualified stock options, restricted stock units and other forms of equity awards.

We recognize stock-based compensation expense for stock options on a straight-line basis over the requisite service period and account for forfeitures as they occur. Our stock-based compensation costs are based upon the grant date fair value of options estimated using the Black-Scholes option pricing model.

ThisTo determine the value of stock option awards for stock-based compensation purposes, we use the Black-Scholes option pricing model utilizesand the assumptions discussed below. Each of these inputs which are highlyis subjective assumptions and generally requirerequires significant judgment. These assumptions include:

Fair Value of Common StockHistorically, for all periods prior to the IPO in July 2020, fair values of the shares of common stock underlying our share-based awards were estimated on each grant date by our board of directors. Our board of directors considered, among other things, valuations of our common stock which were prepared by an independent third-party valuation firm in accordance with the guidance provided by the American Institute of Certified Public Accountants 2013 Practice Aid, Valuation of Privately-Held-Company Equity Securities Issued as Compensation. After the completion of our IPO, our board of directors determined theThe fair value of each share of underlying common stock is based on the closing price of our common stock as reported on the date of grant on the Nasdaq Global Select Market.

Expected Term—The expected term represents the period that the stock-based awards are expected to be outstanding and is determined using the simplified method (based on the mid-point between the vesting date and the end of the contractual term). We continue using the simplified method as we do not have sufficient historical exercise

105


data to provide a reasonable basis upon which to estimate expected term due to the limited period of time our equity shares have been publicly traded.

Expected VolatilityWeBecause we do not have sufficient trading history for our common stock, the expected volatility was estimated based on the average volatility for comparable publicly traded life sciences companies over a period equal to the expected term of the stock option grants. The comparable companies were chosen based on the similar size, stage in life cycle or area of specialty.

Risk-Free Interest Rate—The risk-free interest rate is based on the U.S. Treasury zero coupon issues in effect at the time of grant for periods corresponding with the expected term of the option.

Dividend Yield—We have never paid dividends on our common stock and have no plans to pay dividends on our common stock. Therefore, we used an expected dividend yield of zero.

See Note 7—Equity Incentive Plan to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K for more information concerning certain of the specific assumptions we used in applying the Black-Scholes option pricing model to determine the estimated fair value of our stock options. Certain of such assumptions involve inherent uncertainties and the application of significant judgment. As a result, if factors or expected outcomes change and we use significantly different assumptions or estimates, our stock-based compensation could be materially different.

Recent Accounting Pronouncements Not Yet Adopted

See Note 2—Basis of Presentation and Significant Accounting Policies to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K for information about recent accounting pronouncements, the timing of their adoption, and our assessment, to the extent we have made one yet, of their potential impact on our financial condition of results of operations.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Not required for the Company as a smaller reporting company.


We remain eligible to take advantage of smaller reporting company reporting requirements through this Annual Report on Form 10-K.
106



Item 8. Financial Statements and Supplementary Data.

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm (KPMG LLP, San Francisco, CA, Auditor Firm ID: 185)185)

108

Consolidated Balance Sheets as of December 31, 20212022 and 20202021

111110

Consolidated Statements of Operations for the Years Ended December 31, 20212022 and 20202021

112111

Consolidated Statements of Comprehensive Loss for the Years Ended December 31, 20212022 and 20202021

113112

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) for the Years endedEnded December 31, 20212022 and 20202021

114113

Consolidated Statements of Cash Flows for the Years Ended December 31, 20212022 and 20202021

115114

Notes to Consolidated Financial Statements

116115


107


Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors
Annexon, Inc.:

OpinionsOpinion on the Consolidated Financial Statements and Internal Control Over Financial Reporting

We have audited the accompanying consolidated balance sheets of Annexon, Inc. and subsidiary (the Company) as of December 31, 20212022 and 2020,2021, the related consolidated statements of operations, comprehensive loss, redeemable convertible preferred stock and stockholders’ equity, (deficit), and cash flows for each of the years in the two-year period ended December 31, 2021,2022, and the related notes (collectively, the consolidated financial statements). We also have audited the Company’s internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 20212022 and 2020,2021, and the results of its operations and its cash flows for each of the years in the two-year period ended December 31, 2021,2022, in conformity with U.S. generally accepted accounting principles. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2021 based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

Basis for Opinion

Change in Accounting Principle

As discussed in Note 2 to theThese consolidated financial statements are the Company has changed its method of accounting for leases as of January 1, 2021 due to the adoption of Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842).

Basis for Opinions

The Company’s management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessmentresponsibility of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting.Company’s management. Our responsibility is to express an opinion on the Company’sthese consolidated financial statements and an opinion on the Company’s internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (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 audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the auditsaudit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effectivefraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting was maintained in all material respects.

Our auditsbut not for the purpose of expressing an opinion on the effectiveness of the consolidatedCompany’s internal control over financial statementsreporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated 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 consolidated 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 consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.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 the 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 directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’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. Also, 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.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Accrued preclinical study and clinical trial expenses

Warrants issued in private placement

As discussed in in Note 26 to the consolidated financial statements, in July 2022 the Company estimates preclinical studyclosed a private placement transaction which included the issuance of common stock, pre-funded warrants and clinical trial expenses based onwarrants to purchase its common stock. Upon issuance, the services performed pursuant to contracts with research institutions, clinical research organizations and clinical manufacturing organizations. In accruing service fees, the Company estimates the period over which services will be performed and the level of effort to be expended in each period. These estimates are based on the Company’s communications with the third-party service providers and on information availablewarrants were recorded at each balance sheet date. If the actual timingfair value as of the performancegrant date as a component of services orstockholders’ equity within additional paid-in capital in the levelamount of effort varies from the estimate, the Company will adjust research and development expenses accordingly to reflect the best information available at the time of the financial statement issuance. As of December 31, 2021, amounts recorded as accrued liabilities were $9.3 million, which included accrued preclinical study and clinical trial expenses.$95.6 million.

We identified the evaluationclassification of accrued preclinical study and clinical trial expenses incurredthe warrants issued as a resultpart of contracts with clinical research organizations and clinical manufacturing organizationsthe private placement transaction as liabilities or equity on the balance sheet as a critical audit matter. SubjectiveA high degree of subjective auditor judgment was required to evaluatein the Company’s assessmentevaluation of the statusclassification of research and development activities, specifically, the period over which services were performed andwarrants due to certain provisions included within the level of effort expended in the period.warrant agreements.

108


The following are the primary procedures we performed to address this critical audit matter. We evaluated the design and testedof a control within the operating effectiveness of certain internal controlsequity process related to the researchdetermination of the classification of the warrants. We obtained and development contract process. This included controls relatedinspected the pre-funded and common stock warrant agreements to identify key terms and conditions within the agreements that were relevant to the assessmentclassification determination. We obtained and inspected the Company’s technical accounting analyses to evaluate whether the Company had considered all key terms and conditions of the period over which services were performed and the level of effort expended in the period. For a selection of research and development contracts, weagreements. We evaluated the period over which servicesCompany’s interpretation and application of the relevant accounting literature, including consideration of whether certain actions were performed by obtaining and inspecting executed contracts and change orders, including the timeline and budget, and agreeing them to the information used inwithin the Company’s estimatecontrol, to support the equity classification of preclinical study and clinical trial expenses incurred to date. In addition, for each selected research and development contract, we evaluated the level of effort expended inwarrants on the period by comparing the Company’s expected status of each clinical trial to confirmations received from clinical research organizations and clinical manufacturing organizations.


balance sheet.

/s/ KPMG LLP

We have served as the Company’s auditor since 2016.

San Francisco, California
March 1, 20226, 2023

109



ANNEXON, INC.

Consolidated Balance Sheets

(in thousands, except share and per share amounts)

 

December 31,

 

 

December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Assets

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash and cash equivalents

 

$

74,843

 

 

$

268,565

 

 

$

140,020

 

 

$

74,843

 

Short-term investments

 

 

167,872

 

 

 

82,641

 

 

 

102,637

 

 

 

167,872

 

Prepaid expenses and other current assets

 

 

4,978

 

 

 

2,805

 

 

 

5,441

 

 

 

4,978

 

Total current assets

 

 

247,693

 

 

 

354,011

 

 

 

248,098

 

 

 

247,693

 

Restricted cash

 

 

1,166

 

 

 

 

 

 

1,032

 

 

 

1,166

 

Property and equipment, net

 

 

17,848

 

 

 

1,935

 

 

 

16,838

 

 

 

17,848

 

Operating lease right-of-use assets

 

 

20,333

 

 

 

 

 

 

19,128

 

 

 

20,333

 

Total assets

 

$

287,040

 

 

$

355,946

 

 

$

285,096

 

 

$

287,040

 

Liabilities and Stockholders' Equity

 

 

 

 

 

 

 

 

Liabilities and Stockholders’ Equity

 

 

 

 

 

 

Current liabilities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Accounts payable

 

$

11,153

 

 

$

3,734

 

 

$

7,416

 

 

$

11,153

 

Accrued liabilities

 

 

9,250

 

 

 

6,497

 

 

 

13,448

 

 

 

9,250

 

Deferred rent, current

 

 

 

 

 

391

 

Operating lease liabilities, current

 

 

1,202

 

 

 

 

 

 

1,316

 

 

 

1,202

 

Other current liabilities

 

 

139

 

 

 

 

 

 

180

 

 

 

139

 

Total current liabilities

 

 

21,744

 

 

 

10,622

 

 

 

22,360

 

 

 

21,744

 

Deferred rent

 

 

 

 

 

1,046

 

Operating lease liabilities, non-current

 

 

33,387

 

 

 

 

 

 

31,542

 

 

 

33,387

 

Total liabilities

 

 

55,131

 

 

 

11,668

 

 

 

53,902

 

 

 

55,131

 

Commitments and contingencies (Note 5)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stockholders’ equity:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Preferred stock, $0.001 par value; 5,000,000 shares authorized as of

December 31, 2021 and 2020, respectively; 0 shares issued and

outstanding as of December 31, 2021 and 2020, respectively

 

 

 

 

 

 

Common stock, $0.001 par value; 300,000,000 shares authorized

as of December 31, 2021 and 2020, respectively; 38,560,854

and 38,157,618 shares issued and outstanding as of

December 31, 2021 and 2020, respectively

 

 

39

 

 

 

38

 

Common stock, $0.001 par value; 300,000,000 shares authorized
as of December 31, 2022 and 2021, respectively;
47,722,995
and
38,560,854 shares issued and outstanding as of
December 31, 2022 and 2021, respectively

 

 

48

 

 

 

39

 

Additional paid-in capital

 

 

528,365

 

 

 

510,309

 

 

 

669,780

 

 

 

528,365

 

Accumulated other comprehensive loss

 

 

(180

)

 

 

(77

)

 

 

(372

)

 

 

(180

)

Accumulated deficit

 

 

(296,315

)

 

 

(165,992

)

 

 

(438,262

)

 

 

(296,315

)

Total stockholders' equity

 

 

231,909

 

 

 

344,278

 

Total stockholders’ equity

 

 

231,194

 

 

 

231,909

 

Total liabilities and stockholders’ equity

 

$

287,040

 

 

$

355,946

 

 

$

285,096

 

 

$

287,040

 

See accompanying notes to consolidated financial statements.


110


ANNEXON, INC.

Consolidated Statements of Operations

(in thousands, except share and per share amounts)

 

Year Ended December 31,

 

 

Year Ended
December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Operating expenses:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Research and development

 

$

100,066

 

 

$

49,271

 

 

$

112,501

 

 

$

100,066

 

General and administrative

 

 

30,647

 

 

 

14,198

 

 

 

33,098

 

 

 

30,647

 

Total operating expenses

 

 

130,713

 

 

 

63,469

 

 

 

145,599

 

 

 

130,713

 

Loss from operations

 

 

(130,713

)

 

 

(63,469

)

 

 

(145,599

)

 

 

(130,713

)

Interest and other income, net

 

 

390

 

 

 

57

 

 

 

3,652

 

 

 

390

 

Net loss

 

 

(130,323

)

 

 

(63,412

)

 

 

(141,947

)

 

 

(130,323

)

Accretion on redeemable convertible preferred stock

 

 

 

 

 

(705

)

Deemed dividend – beneficial conversion feature on redeemable

convertible preferred stock

 

 

 

 

 

(6,219

)

Net loss attributable to common stockholders

 

$

(130,323

)

 

$

(70,336

)

 

$

(141,947

)

 

$

(130,323

)

Net loss per share attributable to common stockholders, basic

and diluted

 

$

(3.40

)

 

$

(4.15

)

 

$

(2.60

)

 

$

(3.40

)

Weighted-average shares used in computing net loss per share

attributable to common stockholders, basic and diluted

 

 

38,316,273

 

 

 

16,962,398

 

 

 

54,673,572

 

 

 

38,316,273

 

See accompanying notes to consolidated financial statements.


111


ANNEXON, INC.

Consolidated Statements of Comprehensive Loss

(in thousands)

 

Year Ended December 31,

 

 

Year Ended
December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Net loss

 

$

(130,323

)

 

$

(63,412

)

 

$

(141,947

)

 

$

(130,323

)

Other comprehensive gain (loss):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Foreign currency translation adjustment

 

 

(5

)

 

 

9

 

 

 

1

 

 

 

(5

)

Unrealized loss on available for sale securities

 

 

(98

)

 

 

(6

)

Unrealized loss on available-for-sale securities

 

 

(193

)

 

 

(98

)

Comprehensive loss

 

$

(130,426

)

 

$

(63,409

)

 

$

(142,139

)

 

$

(130,426

)

See accompanying notes to consolidated financial statements.

112



ANNEXON, INC.

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit)

(in thousands, except share amounts)

 

 

Redeemable Convertible

Preferred Stock

 

 

 

Common Stock

 

 

Additional

Paid-In

 

 

Accumulated

Other

Comprehensive

 

 

Accumulated

 

 

Total

Stockholders’

 

 

 

Shares

 

 

Cost

 

 

 

Shares

 

 

Cost

 

 

Capital

 

 

Loss

 

 

Deficit

 

 

Equity (Deficit)

 

Balances as of December 31, 2019

 

 

111,748,065

 

 

$

143,984

 

 

 

 

433,749

 

 

$

4

 

 

$

2,202

 

 

$

(80

)

 

$

(102,580

)

 

 

(100,454

)

Accretion on redeemable convertible

   preferred stock

 

 

 

 

 

705

 

 

 

 

 

 

 

 

 

 

(705

)

 

 

 

 

 

 

 

 

(705

)

Issuance of Series D redeemable

   convertible preferred stock, net

   of issuance costs of $5,200

 

 

71,719,859

 

 

 

96,807

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Beneficial conversion feature on Series D

   redeemable convertible preferred stock

 

 

 

 

 

(6,297

)

 

 

 

 

 

 

 

 

 

6,297

 

 

 

 

 

 

 

 

 

6,297

 

Conversion of redeemable convertible

   preferred stock to common stock upon

   initial public offering

 

 

(183,467,924

)

 

 

(241,418

)

 

 

 

20,824,938

 

 

 

21

 

 

 

241,397

 

 

 

 

 

 

 

 

 

241,418

 

Deemed dividend of beneficial conversion

   feature on conversion of redeemable

   convertible preferred stock

 

 

 

 

 

6,219

 

 

 

 

 

 

 

 

 

 

(6,219

)

 

 

 

 

 

 

 

 

(6,219

)

Issuance of common stock in connection

   with initial public offering, net of

   issuance costs of $24,700

 

 

 

 

 

 

 

 

 

16,889,403

 

 

 

13

 

 

 

262,427

 

 

 

 

 

 

 

 

 

262,440

 

Stock-based compensation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4,888

 

 

 

 

 

 

 

 

 

4,888

 

Stock option exercises

 

 

 

 

 

 

 

 

 

9,528

 

 

 

 

 

 

22

 

 

 

 

 

 

 

 

 

22

 

Foreign currency translation adjustment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

 

9

 

Unrealized loss on available-for-sale

   securities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6

)

 

 

 

 

 

(6

)

Net loss

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(63,412

)

 

 

(63,412

)

Balances as of December 31, 2020

 

 

0

 

 

 

0

 

 

 

 

38,157,618

 

 

 

38

 

 

 

510,309

 

 

 

(77

)

 

 

(165,992

)

 

 

344,278

 

Stock-based compensation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16,262

 

 

 

 

 

 

 

 

 

16,262

 

Stock option exercises

 

 

 

 

 

 

 

 

 

391,349

 

 

 

1

 

 

 

1,609

 

 

 

 

 

 

 

 

 

1,610

 

Issuance of common stock per ESPP

   purchase

 

 

 

 

 

 

 

 

 

11,887

 

 

 

 

 

 

185

 

 

 

 

 

 

 

 

 

185

 

Foreign currency translation adjustment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(5

)

 

 

 

 

 

(5

)

Unrealized loss on available-for-sale

   securities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(98

)

 

 

 

 

 

(98

)

Net loss

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(130,323

)

 

 

(130,323

)

Balances as of December 31, 2021

 

 

 

 

$

 

 

 

 

38,560,854

 

 

$

39

 

 

$

528,365

 

 

$

(180

)

 

$

(296,315

)

 

$

231,909

 

 

 

Common Stock

 

 

Additional
Paid-In

 

 

Accumulated Other
Comprehensive

 

 

Accumulated

 

 

Total
Stockholders’

 

 

 

Shares

 

 

Cost

 

 

Capital

 

 

Loss

 

 

Deficit

 

 

Equity

 

Balances as of December 31, 2020

 

 

38,157,618

 

 

$

38

 

 

$

510,309

 

 

$

(77

)

 

$

(165,992

)

 

$

344,278

 

Stock-based compensation

 

 

 

 

 

 

 

 

16,262

 

 

 

 

 

 

 

 

 

16,262

 

Stock option exercises

 

 

391,349

 

 

 

1

 

 

 

1,609

 

 

 

 

 

 

 

 

 

1,610

 

Issuance of common stock per
  Employee Stock Purchase Plan
  purchase

 

 

11,887

 

 

 

 

 

 

185

 

 

 

 

 

 

 

 

 

185

 

Foreign currency translation
  adjustment

 

 

 

 

 

 

 

 

 

 

 

(5

)

 

 

 

 

 

(5

)

Unrealized loss on available-for-sale
  securities

 

 

 

 

 

 

 

 

 

 

 

(98

)

 

 

 

 

 

(98

)

Net loss

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(130,323

)

 

 

(130,323

)

Balances as of December 31, 2021

 

 

38,560,854

 

 

 

39

 

 

 

528,365

 

 

 

(180

)

 

 

(296,315

)

 

 

231,909

 

Stock-based compensation

 

 

 

 

 

 

 

 

18,516

 

 

 

 

 

 

 

 

 

18,516

 

Stock option exercises

 

 

15,364

 

 

 

 

 

 

80

 

 

 

 

 

 

 

 

 

80

 

Issuance of common stock, pre-funded
  warrants and common warrants, net of
  issuance costs of $
7,988 (related party
  proceeds - $
9,500)

 

 

9,013,834

 

 

 

9

 

 

 

122,479

 

 

 

 

 

 

 

 

 

122,488

 

Issuance of common stock per
  Employee Stock Purchase Plan
  purchase

 

 

121,126

 

 

 

 

 

 

340

 

 

 

 

 

 

 

 

 

340

 

Restricted common stock vested in the
  period

 

 

11,817

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Foreign currency translation
  adjustment

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

1

 

Unrealized loss on available-for-sale
  securities

 

 

 

 

 

 

 

 

 

 

 

(193

)

 

 

 

 

 

(193

)

Net loss

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(141,947

)

 

 

(141,947

)

Balances as of December 31, 2022

 

 

47,722,995

 

 

$

48

 

 

$

669,780

 

 

$

(372

)

 

$

(438,262

)

 

$

231,194

 

See accompanying notes to consolidated financial statements.

113



ANNEXON, INC.

Consolidated Statements of Cash Flows

(in thousands)

 

Year Ended December 31,

 

 

Year Ended
December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Operating activities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Net loss

 

$

(130,323

)

 

$

(63,412

)

 

$

(141,947

)

 

$

(130,323

)

Adjustments to reconcile net loss to net cash used in operating activities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Depreciation and amortization

 

 

2,141

 

 

 

667

 

 

 

2,106

 

 

 

2,141

 

Accretion of discount on available-for sale securities

 

 

1,253

 

 

 

53

 

Accretion of discount on available-for-sale securities

 

 

73

 

 

 

1,253

 

Stock-based compensation

 

 

16,262

 

 

 

4,888

 

 

 

18,516

 

 

 

16,262

 

Reduction in the carrying amount of right-of-use assets

 

 

1,273

 

 

 

 

 

 

1,205

 

 

 

1,273

 

Changes in operating assets and liabilities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Prepaid expenses and other current assets

 

 

(2,612

)

 

 

(1,330

)

 

 

(463

)

 

 

(2,612

)

Other long-term assets

 

 

 

 

 

96

 

Accounts payable

 

 

3,859

 

 

 

1,513

 

 

 

(287

)

 

 

3,859

 

Accrued liabilities

 

 

773

 

 

 

4,804

 

 

 

6,178

 

 

 

773

 

Deferred rent

 

 

 

 

 

(366

)

Operating lease liabilities

 

 

1,125

 

 

 

 

 

 

(1,731

)

 

 

1,125

 

Other current liabilities

 

 

139

 

 

 

 

 

 

41

 

 

 

139

 

Net cash used in operating activities

 

 

(106,110

)

 

 

(53,087

)

 

 

(116,309

)

 

 

(106,110

)

Investing activities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Purchases of property and equipment

 

 

(1,654

)

 

 

(464

)

 

 

(6,526

)

 

 

(1,654

)

Purchases of available-for-sale securities

 

 

(225,601

)

 

 

(82,700

)

 

 

(113,197

)

 

 

(225,601

)

Proceeds from sale of available-for-sale securities

 

 

5,993

 

 

 

 

Proceeds from sale of available-for-sale-securities

 

 

 

 

 

5,993

 

Proceeds from maturities of available-for-sale securities

 

 

133,026

 

 

 

 

 

 

178,166

 

 

 

133,026

 

Net cash used in investing activities

 

 

(88,236

)

 

 

(83,164

)

Net cash provided by (used in) investing activities

 

 

58,443

 

 

 

(88,236

)

Financing activities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Proceeds from the exercise of common stock options

 

 

1,610

 

 

 

22

 

 

 

80

 

 

 

1,610

 

Proceeds from employee stock purchase plan

 

 

185

 

 

 

 

Proceeds from Paycheck Protection Program loan

 

 

 

 

 

500

 

Repayments of Paycheck Protection Program loan

 

 

 

 

 

(500

)

Proceeds from issuance of redeemable convertible preferred stock (including

$13,900 of proceeds from the related parties)

 

 

 

 

 

102,000

 

Payments of issuance costs related to redeemable convertible preferred stock

 

 

 

 

 

(5,193

)

Proceeds from issuance of common stock upon initial public offering, net of

underwriting discounts and commissions

 

 

 

 

 

267,021

 

Payments of offering costs related to initial public offering

 

 

 

 

 

(2,974

)

Proceeds from employee stock plan purchases

 

 

340

 

 

 

185

 

Proceeds from the issuance of common stock, pre-funded warrants and common warrants

 

 

120,976

 

 

 

 

Proceeds from the issuance of common stock, pre-funded warrants and common
warrants - related party

 

 

9,500

 

 

 

 

Payment of issuance costs related to the issuance of common stock, pre-funded
warrants and common warrants

 

 

(7,988

)

 

 

 

Net cash provided by financing activities

 

 

1,795

 

 

 

360,876

 

 

 

122,908

 

 

 

1,795

 

(Decrease) increase in cash, cash equivalents, and restricted cash

 

 

(192,551

)

 

 

224,625

 

Increase (decrease) in cash, cash equivalents and restricted cash

 

 

65,042

 

 

 

(192,551

)

Effect of exchange rate changes on cash, cash equivalents and restricted cash

 

 

(5

)

 

 

9

 

 

 

1

 

 

 

(5

)

Cash, cash equivalents, and restricted cash at beginning of year

 

 

268,565

 

 

 

43,931

 

Cash, cash equivalents, and restricted cash at end of year

 

$

76,009

 

 

$

268,565

 

Supplemental disclosures of cash flow information:

 

 

 

 

 

 

 

 

Cash, cash equivalents and restricted cash

 

 

 

 

 

 

Beginning of period

 

 

76,009

 

 

 

268,565

 

End of period

 

$

141,052

 

 

$

76,009

 

Supplemental disclosure of cash flow information:

 

 

 

 

 

 

Cash paid for amounts included in the measurement of lease liability

 

$

996

 

 

$

 

 

$

10,078

 

 

$

996

 

Non-cash investing and financing activities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reclassification of redeemable convertible preferred stock to common stock upon

initial public offering

 

$

 

 

$

241,418

 

Accretion on redeemable convertible preferred stock

 

$

 

 

$

705

 

Purchases of property and equipment included in accounts payable and accrued liabilities

 

$

110

 

 

$

5,540

 

Right-of-use assets obtained in exchange for lease liability

 

$

21,084

 

 

$

 

 

$

 

 

$

21,084

 

Leasehold improvements obtained in exchange for tenant improvement allowance from lessors

 

$

10,860

 

 

$

 

Purchase of property and equipment included in accounts payable and accrued liabilities

 

$

5,540

 

 

$

 

Beneficial conversion feature recognized upon issuance of redeemable

convertible preferred stock

 

$

 

 

$

6,297

 

Deemed dividend arising from conversion of beneficial conversion feature

 

$

 

 

$

6,219

 

Construction-in-progress obtained in exchange for tenant improvement allowance from lessors

 

$

 

 

$

10,860

 

See accompanying notes to consolidated financial statements.


114


ANNEXON, INC.

Notes to Consolidated Financial Statements

1. Organization

1.

Organization

Annexon, Inc., or the Company, is a clinical-stage biopharmaceutical company pioneering a new class of complement medicines designed to stop thefor patients with classical complement pathway at its start, C1q, in order to bring therapies to patients suffering from serious complement-mediated autoimmune, neurodegenerative and ophthalmic disorders. The Company is located in Brisbane, California and was incorporated in Delaware in March 2011.

The Company’s wholly-owned subsidiary, Annexon Biosciences Australia Pty Ltd, or the Subsidiary, is a proprietary limited company incorporated in 2016 and domiciled in Australia. The Subsidiary is also engaged in research and development activities in support of its parent company.

Initial Public OfferingLiquidity

On July 23, 2020, the Company’s registration statement on Form S-1 relating to its initial public offering, or the IPO, was declared effective by the SEC and the shares of its common stock began trading on the Nasdaq Global Select Market on July 24, 2020. The IPO closed on July 28, 2020, pursuant to which the Company issued and sold 14,750,000 shares of its common stock at a public offering price of $17.00 per share. On August 4, 2020, the Company issued 2,139,403 shares of its common stock to the underwriters of the IPO pursuant to the partial exercise of their option to purchase additional shares.The Company received net proceeds of approximately $262.4 million from the IPO, after deducting underwriting discounts and commissions of $20.1 million and offering costs of $4.6 million. Immediately prior to the completion of the IPO, all shares of redeemable convertible preferred stock then outstanding were converted into 20,824,938 shares of common stock.

Reverse Stock Split

On July 17, 2020, the Company’s board of directors approved an amendment to the Company’s certificate of incorporation to effect a reverse split of shares of the Company’s common stock on a one-for-8.81 basis, or the Reverse Stock Split. The number of authorized shares and the par values of the common stock and redeemable convertible preferred stock were not adjusted as a result of the Reverse Stock Split. In connection with the Reverse Stock Split, the conversion ratio for the Company’s outstanding redeemable convertible preferred stock was proportionately adjusted such that the common stock issuable upon conversion of such preferred stock was decreased in proportion to the Reverse Stock Split. All references to common stock and options to purchase common stock share data, per share data and related information contained in the consolidated financial statements have been adjusted to reflect the effect of the Reverse Stock Split.

Liquidity

Since inception, the Company has been involved primarily in performing research and development activities, conducting clinical trials, hiring personnel, and raising capital to support and expand these activities. The Company has experienced losses and negative cash flows from operations since its inception and, as of December 31, 2021,2022, had an accumulated deficit of $296.3$438.3 million and cash and cash equivalents and short-term investments of $242.7$242.7 million.

The Company has historically funded its operations through the issuance of shares of its redeemable convertible preferred stock, common stock and common stock.warrants. Based on projected activities, management projects that cash on hand is sufficient to support operations for at least the next 12 months following issuance of these consolidated financial statements. Management expects to continue to incur losses and negative cash flows from operations for at least the next several years.


2.
Basis of Presentation and Significant Accounting Policies

2.

Basis of PresentationandSignificantAccounting Policies

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, or GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported expenses during the reporting period. Management evaluates its estimates, including but not limited to the fair value of investments, stock options, income taxes, clinical trial accruals and stock-based compensation. The Company evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors and adjusts those estimates and assumptions when facts and circumstances dictate. Actual results could differ from those estimates.

Principlesof Consolidation

The consolidated financial statements include the operations of Annexon, Inc. and its wholly owned subsidiary and include the results of operations and cash flows of these entities. All intercompany balances and transactions have been eliminated in consolidation.

Segments

Segments

The Company’s chief operating decision maker is its Chief Executive Officer. The Chief Executive Officer reviews financial information on an aggregate basis for the purposes of evaluating financial performance and allocating the Company’s resources. Accordingly, the Company has determined that it operates in 1one segment.

115


Cash, Cash Equivalents and Restricted Cash

TheCompany considers allhighlyliquidinstrumentswithanoriginalmaturityofthreemonthsorlessat timeofpurchasetobecashequivalents.Cashequivalents,whichincludesamountsinvestedinmoneymarket funds, are statedat fair value.value.

Restricted cash as of December 31, 20212022 relates to the letters of credit established for the Company’s office leases.lease.

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the total of the same amounts shown in the consolidated statements of cash flows:

 

 

December 31,

 

 

 

2021

 

 

2020

 

Cash

 

$

734

 

 

$

597

 

Cash equivalents

 

 

74,109

 

 

 

267,968

 

Cash and cash equivalents

 

 

74,843

 

 

 

268,565

 

Restricted cash

 

 

1,166

 

 

 

Cash, cash equivalents and restricted cash

 

$

76,009

 

 

$

268,565

 

 

 

December 31,

 

 

 

2022

 

 

2021

 

Cash

 

$

570

 

 

$

734

 

Cash equivalents

 

 

139,450

 

 

 

74,109

 

Cash and cash equivalents

 

 

140,020

 

 

 

74,843

 

Restricted cash

 

 

1,032

 

 

 

1,166

 

Cash, cash equivalents and restricted cash

 

$

141,052

 

 

$

76,009

 

Short-Term Investments

Short-term investments have been classified as available-for-sale and are carried at estimated fair value as determined based upon quoted market prices or pricing models for similar securities. The Company determines the appropriate classification of its investments in debt securities at the time of purchase. Available-for-sale securities with original maturities beyond three months at the date of purchase are classified as current based on their availability for use in current operations.


The Company evaluates, on a quarterly basis, its available-for-sale debt securities for potential impairment. For available-for-sale debt securities in an unrealized loss position, the Company assesses whether such declines are due to credit loss based on factors such as changes to the rating of the security by a ratings agency, market conditions and supportable forecasts of economic and market conditions, among others. If credit loss exists, the Company assesses whether it has plans to sell the security or it is more likely than not it will be required to sell any available-for-sale debt security before recovery of its amortized cost basis. If either condition is met, the security’s amortized cost basis is written down to fair value and is recognized through interest and other income (expense), net. If neither condition is met, declines as a result of credit losses, if any, are recognized as an allowance for credit loss, limited to the amount of unrealized loss, through interest and other income (expense), net. Any portion of the unrealized loss that is not a result of a credit loss, is recognized in other comprehensive income (loss). Realized gains and losses, if any, on available-for-sale debt securities are included in interest and other income (expense), net.

The cost of investments sold is based on the specific-identification method. Interest on available-for-sale debt securities is included in interest and other income (expense), net.

Property and Equipment, Net

Property and equipment are carried at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the respective assets. Depreciation begins at the time the asset is placed in service. Maintenance and repairs are charged to operations as incurred. Upon sale or retirement of assets, the cost and related accumulated depreciation are removed from the balance sheet and the resulting gain or loss is reflected in operations in the period realized.

116


The usefullivesof the propertyand equipmentare as follows:

LaboratoryComputer equipment

53 years

OfficeLab equipment and computer equipmentfurniture and fixtures

35 years

Leasehold improvements

Shorter of remaining lease term or estimated useful life

Impairment of Long-Lived Assets

The Company evaluates its long-lived assets, including property and equipment, for impairment whenever events or changes in circumstances indicate that the carrying amount of these assets may not be recoverable. Recoverability of these assets is measured by comparison of the carrying amount of each asset to the future undiscounted cash flows the asset is expected to generate over its remaining life. When indications of impairment are present and the estimated undiscounted future cash flows from the use of these assets is less than the assets’ carrying value, the related assets will be written down to fair value. There were 0no impairments of the Company’s long-lived assets for the periods presented.

Leases

Leases

The Company determines if an arrangement is a lease at inception. Upon adoption of Accounting Standards Codification 842, Leases, as of January 1, 2021, the Company includes operating leases in operating lease right of use, or ROU, assets, current and noncurrent operating lease liabilities in the Company’s consolidated balance sheets. The ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. The Company measures the ROU assets based on the associated lease liabilities adjusted for any lease incentives such as tenant improvement allowances. As most of the leases do not provide an implicit rate, the Company generally uses its incremental borrowing rate based on the estimated rate of interest for collateralized borrowing over a similar term of the lease payments at the commencement date. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise the option. Lease expense for lease payments is recognized on a straight-line basis, net of sublease income, over the lease term.


As a practical expedient, the Company elected, for all facility leases, not to separate non-lease components from lease components and instead to account for each separate lease component and its associated non-lease components as a single lease component. The Company elected to exclude from its balance sheets recognition of leases having a term of 12 months or less (short-term leases).

Income Taxes

Incometaxesareaccountedforundertheassetandliabilitymethod.Deferredtaxassetsandliabilitiesare recognizedforthefuturetaxconsequencesattributabletodifferencesbetweenthefinancialstatementcarrying amountsofexistingassetsandliabilitiesandtheirrespectivetaxbasesandoperatinglossandtaxcreditcarry forwards.Deferredtaxassetsandliabilitiesaremeasuredusingenactedtaxratesexpectedtoapplytotaxable incomeintheyearsinwhichthosetemporarydifferencesareexpectedtoberecoveredorsettled.Theeffecton deferredtaxassetsandliabilitiesofachangeintaxratesisrecognizedinincomeintheperiodthatincludesthe enactmentdate.Valuationallowancesareestablishedwhennecessarytoreducedeferredtaxestotheamounts expectedto be realized.

TheCompanyrecognizesbenefitsofuncertaintaxpositionsifitismorelikelythannotthatsuchpositions willbesustaineduponexaminationbasedsolelyontheirtechnicalmerit,asthelargestamountofbenefitthatis morelikelythannottoberealizedupontheultimatesettlement.TheCompany’spolicyistorecognizeinterest andpenaltiesrelatedtotheunderpaymentofincometaxesasacomponentofincometaxexpenseorbenefit.To date, therehave been 0no interestor penaltieschargedin relationto the unrecognized tax benefits.

117


 tax benefits.

Commitments and Contingencies

Liabilitiesfor for losscontingenciesarisingfromclaims,assessments,litigation,fines,andpenaltiesandother sourcesarerecordedwhenitisprobablethataliabilityhasbeenincurredandtheamountcanbereasonably estimated.Legal costsincurredin connectionwith loss contingenciesare expensed as incurred.

Foreign CurrenciesWarrants

Warrants are accounted for as either derivative liabilities or as equity instruments depending on the specific terms of the agreement. TheCompany’sreportingcurrencyistheU.S.dollar.ThefunctionalcurrencyoftheCompany’ssubsidiary located pre-funded and common warrants are equity-classified instruments that were recorded inAustraliaistheAustralianDollar.Balancesheetspreparedinthefunctionalcurrencies additional paid-in capital at issuance and aretranslated not subject to thereportingcurrencyatexchangeratesremeasurement. The Company periodically evaluates changes ineffectattheendoftheaccountingperiod,exceptforstockholders’ equityaccounts,whicharetranslatedatratesineffectwhenthesebalanceswereoriginallyrecorded.Revenue facts andexpenseaccountsaretranslatedusinga weighted-averagerateduring circumstances that could impact the year. The resultingclassification of warrants.

foreigncurrency translationadjustmentsarerecordedasaseparatecomponentofaccumulatedothercomprehensivelossinthe accompanyingconsolidatedbalancesheets.Foreignexchange translation loss for the year ended December 31, 2021 was $5,000 and gain for the year ended December31, 2020 was $9,000.

Gainsandlossesresultingfromexchangeratechangesontransactionsdenominatedinacurrencyotherthan the functionalcurrencyare includedin earningsas incurred.

Research and Development Expense

Research and development expenses consist primarily of direct and indirect costs incurred for the development of the Company’s product candidates.

Direct expenses include (i) preclinical and clinical outside service costs associated with discovery, preclinical and clinical testing of the Company’s product candidates; (ii) professional services agreements with third-party contract organizations, investigative clinical trial sites and consultants that conduct research and development activities on the Company’s behalf; (iii) contract manufacturing costs to produce clinical trial materials; and (iv) laboratory supplies and materials. Indirect expenses include (A) compensation and personnel-related expenses (including stock-based compensation), (B) allocated expenses for facilities and depreciation; and (C) other indirect costs.


Research and development costs are expensed as incurred. Payments made to third parties are under agreements that are generally cancelable by the Company. Advance payments for research and development activities are deferred as prepaid expenses. The prepaid amounts are expensed as the related services are performed.

The Company estimates preclinical studies and clinical trial expenses based on the services performed pursuant to contracts with research institutions and clinical research organizations that conduct and manage preclinical studies and clinical trials on the Company’s behalf. The Company also estimates manufacturing costs based on services performed pursuant to contracts with contract manufacturing organizations that develop and manufacture product on the Company’s behalf. In accruing service fees, the Company estimates the period over which services will be performed and the level of effort to be expended in each period. These estimates are based on the Company’s communications with the third-party service providers and on information available at each balance sheet date. If the actual timing of the performance of services or the level of effort varies significantly from the estimate, the Company will adjusttheaccrualaccordinglytoreflectthebest informationavailableatthetimeofthefinancialstatementissuance.TheCompanyhasnotexperiencedany materialdifferencesbetween accruedcostsand actual costs incurred since its inception.

costsincurredsinceitsinception.

Stock-Based Compensation

The Company accounts for stock-based compensation arrangements with employees and non-employee directors and consultants using a fair value method which requires the recognition of compensation expense for costs related to all stock-based payments, including stock options and restricted stock units, or RSUs. The fair value method requires the Company to estimate the fair value of stock options to employees and non-employees on the date of grant using the Black-Scholes option pricing model. The fair value of RSU awards are based on the fair value of the underlying common stock as of the grant date.

The Company grants certain employees performance-based stock options. For awards that include performance conditions, no compensation cost is recognized until the performance goals are probable of being met, at which time the cumulative compensation expense from the service inception date would be recognized.

Stock-based compensation costs are based on the fair value of the underlying option calculated using the Black-Scholes option pricing model and recognized as expense on a straight-line basis (for all but performance-based awards for which the accelerated method is used) over the requisite service period, which is the vesting period.

118


Determining the appropriate fair value model and related assumptions requires judgment, including estimating expected term, expected stock price volatility, risk-free interest rate and dividend yield. The Company accounts for forfeituresas they occur.

Accounting for Non-Recurring Grant Income

Non-recurring grant income is recognized when the research and development activities have been undertaken and the Company has completed its assessment of whether such activities meet the relevant qualifying criteria. Grants received from government and other agencies in advance of the specific research and development costs to which they relate are deferred and recognized in the consolidated statement of operations in the period they are earned and when the related research and development costs are incurred. Non-recurring grant income recognized in interest and other income (expense), net was $135,000 for the year ended December 31, 2021. NaN non-recurring grant income was recognized during 2020.

Net Loss Per Share Attributableto Common Stockholders

Basic net loss per share attributable to common stockholders is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding for the period, without consideration for potential dilutive shares of common stock. As the Company was in a loss position for all periods presented, basic net loss per share attributable to common stockholders is the same as diluted net loss per share attributable to common stockholders because the effects of potentially dilutive securities are antidilutive.


Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents and short-term investments. The Company’s cash and cash equivalents and short-term investments are held by high credit quality financial institutions in the United States. At times, such deposits may be in excess of the Federal Depository Insurance Corporation insured limits. Management believes that the financial institutions are financially sound, and accordingly, minimal credit risk exists with respect to the financial institutions.

Recently Adopted Accounting Pronouncements

In August 2018, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update, or ASU, No. 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (Topic 350). The standard requires implementation costs incurred by customers in cloud computing arrangements to be deferred over the noncancelable term of the cloud computing arrangements plus any optional renewal periods (1) that are reasonably certain to be exercised by the customer or (2) for which exercise of the renewal option is controlled by the cloud service provider. The effective date of this pronouncement is for fiscal years beginning after December 15, 2020 and early adoption is permitted. The standard can be adopted either using the prospective or retrospective transition approach.The Company adopted ASU No. 2018-15 on January 1, 2021 and the adoption did not have a material impact on its consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), which supersedes the guidance in former ASC 840, Leases. This standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less may be accounted for under ASC 842, similar to the operating leases under ASC 840.

In the second quarter of 2021, the Company adopted ASU No. 2016-02 using the modified retrospective approach as of January 1, 2021.The adoption of Topic 842 as of January 1, 2021 resulted in the recognition of ROU assets of $0.5 million, corresponding lease liabilities of $0.6 million, the derecognition of the deferred rent liability of $1.4 million, and the recognition of a liability of $1.3 million related to the reallocation of the consideration of the Company’s lease pending the commencement of the second lease component in May 2021 (see Note 5—Commitments and Contingencies). The adoption resulted in additional $0.1 million of rent expense for the first quarter of 2021. Under the optional transition method, the Company does not need to restate the comparative periods in transition and will continue to present financial information and disclosures for periods before January 1, 2021 in accordance with Topic 840.

As part of the Topic 842 adoption, the Company elected certain practical expedients outlined in the guidance. The Company has chosen to apply the package of practical expedients for existing leases, which provides relief from reassessing: (i) whether a contract is or contains a lease, (ii) lease classification, and (iii) whether initial direct costs can be capitalized. The Company did not elect the hindsight practical expedient to reassess the lease term for existing leases. The Company elected the short-term lease exemption, under which any lease less than 12 months is excluded from recognition on the balance sheet. Additionally, the Company elected the non-separation of lease and non-lease components.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 requires an entity to utilize a new impairment model that requires measurement and recognition of expected credit losses for most financial assets and certain other instruments, including but not limited to available-for-sale debt securities. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses rather than as a direct write-down to the security. The new guidance requires the use of forward-looking expected credit loss models based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount, which may result in earlier recognition of credit losses under the new guidance. The new guidance also modifies the impairment models for available-for-sale debt securities and for purchased financial assets with credit deterioration since their origination. Subsequent to the issuance of ASU 2016-13, the FASB issued ASU 2018-19, Codification


Improvements to Topic 326, Financial Instruments —Credit Losses. This ASU does not change the core principle of the guidance in ASU 2016-13, instead these amendments are intended to clarify and improve operability of certain topics included within the credit losses guidance. The FASB also subsequently issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Derivatives and Hedging (Topic 815), and Financial Instruments (Topic 825), which did not change the core principle of the guidance in ASU 2016-13 but clarified that expected recoveries of amounts previously written off and expected to be written off should be included in the valuation account and should not exceed amounts previously written off and expected to be written off. In MarchAugust 2020, the FASB issued ASU No. 2020-3, 2020-06, “Codification Improvements to Financial InstrumentsDebt — Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging — Contracts in Entity's Own Equity (Subtopic 815-40) which makes narrow-scope improvements to various financial instruments topics, including” (“ASU No. 2020-06”). ASU No. 2020-06 simplifies the new credit losses standard and clarifies the following areas (i) the contractual term of a net investment in a lease should be the contractual term used to measure expected credit losses; (ii) when an entity regains control of financial assets sold, an allowanceaccounting for credit losses should be recorded.convertible instruments. The guidance is effectiveremoves certain accounting models that separate the embedded conversion features from the host contract for fiscal years, and interim periods within those years, beginning after December 15, 2019 for public business entities, excluding smaller reporting companies. convertible instruments. The Company adopted this guidance on a modified-retrospective basis ASU 2020-06 effective as of January 1, 2021 and noted no material 2022. The adoption of ASU 2020-06 did not have an impact to on the Company’s consolidated financial statements.

RecentlyIssued Accounting Pronouncements

The Company has reviewed the FASB issued ASU accounting pronouncements and interpretations thereof that have effectiveness dates during the periods reported and in future periods. The Company has carefully considered the new pronouncements that alter previous generally accepted accounting principles and do not believe that any new or modified principles will have a material impact on the Company’s reported financial position or operations in the near term. The applicability of any standard is subject to the formal review of the Company’s financial management.

3.
Fair Value Measurements

3.

Fair Value Measurements

The Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. The Company determines fair value based on assumptions that market participants would use in pricing an asset or liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels:

Level 1 Inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.
Level 2 Inputs: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.
Level 3 Inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date.

119


Level 1 Inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

Level2Inputs:OtherthanquotedpricesincludedinLevel1inputsthatareobservablefortheassetor liability,eitherdirectlyor indirectly,for substantiallythe fulltermof the assetor liability.

Level3Inputs:Unobservableinputsfortheassetorliabilityusedtomeasurefairvaluetotheextent thatobservableinputsarenotavailable,therebyallowingforsituationsinwhichthereislittle,ifany, marketactivityfor the assetor liabilityat measurementdate.


On a recurring basis, the Company measures certain financial assets and liabilities at fair value. The following tables summarize the fair value of the Company’s financial assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):

 

 

 

 

December 31, 2021

 

 

 

Valuation

Hierarchy

 

Amortized

Cost

 

 

Gross

Unrealized

Holding

Gains

 

 

Gross

Unrealized

Holding

Losses

 

 

Aggregate

Fair Value

 

Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

Level 1

 

$

74,109

 

 

$

 

 

$

 

 

$

74,109

 

Short-term investments:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Commercial paper

 

Level 2

 

 

85,352

 

 

 

 

 

 

(27

)

 

 

85,325

 

Corporate debt

 

Level 2

 

 

48,814

 

 

 

 

 

 

(24

)

 

 

48,790

 

Government bonds

 

Level 2

 

 

33,809

 

 

 

 

 

 

(52

)

 

 

33,757

 

Total assets

 

 

 

$

242,084

 

 

$

 

 

$

(103

)

 

$

241,981

 

 

 

 

 

December 31, 2022

 

 

 

Valuation
Hierarchy

 

Amortized
Cost

 

 

Gross
Unrealized
Holding
Gains

 

 

Gross
Unrealized
Holding
Losses

 

 

Aggregate
Fair Value

 

Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

Level 1

 

$

139,450

 

 

$

 

 

$

 

 

$

139,450

 

Short-term investments:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Commercial paper

 

Level 2

 

 

42,467

 

 

 

 

 

 

(82

)

 

 

42,385

 

Corporate bonds

 

Level 2

 

 

35,638

 

 

 

14

 

 

 

 

 

 

35,652

 

Government bonds

 

Level 2

 

 

24,804

 

 

 

 

 

 

(204

)

 

 

24,600

 

Total assets

 

 

 

$

242,359

 

 

$

14

 

 

$

(286

)

 

$

242,087

 

 

 

 

 

December 31, 2021

 

 

 

Valuation
Hierarchy

 

Amortized
Cost

 

 

Gross
Unrealized
Holding
Gains

 

 

Gross
Unrealized
Holding
Losses

 

 

Aggregate
Fair Value

 

Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

Level 1

 

$

74,109

 

 

$

 

 

$

 

 

$

74,109

 

Short-term investments:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Commercial paper

 

Level 2

 

 

85,352

 

 

 

 

 

 

(27

)

 

 

85,325

 

Corporate bonds

 

Level 2

 

 

48,814

 

 

 

 

 

 

(24

)

 

 

48,790

 

Government bonds

 

Level 2

 

 

33,809

 

 

 

 

 

 

(52

)

 

 

33,757

 

Total assets

 

 

 

$

242,084

 

 

$

 

 

$

(103

)

 

$

241,981

 

 

 

 

 

December 31, 2020

 

 

 

Valuation

Hierarchy

 

Amortized

Cost

 

 

Gross

Unrealized

Holding

Gains

 

 

Gross

Unrealized

Holding

Losses

 

 

Aggregate

Fair Value

 

Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

Level 1

 

$

267,968

 

 

$

 

 

$

 

 

$

267,968

 

Short-term investments:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Commercial paper

 

Level 2

 

 

59,930

 

 

 

 

 

 

 

 

 

59,930

 

Corporate bonds

 

Level 2

 

 

22,717

 

 

 

1

 

 

 

(7

)

 

 

22,711

 

Total assets

 

 

 

$

350,615

 

 

$

1

 

 

$

(7

)

 

$

350,609

 

All of the investments held as of December 31, 20212022 had original maturities of less than two years.years. As of December 31, 2022, all of the investments are scheduled to mature in 12 months.

For the years ended December 31, 20212022 and 2020,2021, the Company recognized no material realized gains or losses on financial instruments.

4.
Balance Sheet Components

4.

Balance Sheet Components

Prepaid Expenses andOtherCurrent Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

 

December 31,

 

 

2021

 

 

2020

 

 

December 31,

 

 

2022

 

 

2021

 

Prepaid research and development costs

 

$

3,805

 

 

$

3,002

 

Prepaid insurance

 

$

1,282

 

 

$

1,236

 

 

 

755

 

 

 

1,282

 

Prepaid research and development costs

 

 

3,002

 

 

 

1,039

 

Other prepaid expenses

 

 

231

 

 

 

527

 

 

 

678

 

 

 

231

 

Other receivables

 

 

 

 

 

3

 

Other current assets

 

 

463

 

 

 

 

 

 

203

 

 

 

463

 

Total prepaid expenses and other current assets

 

$

4,978

 

 

$

2,805

 

 

$

5,441

 

 

$

4,978

 


120


Property andEquipment, Net

Property and equipment, net consisted of the following (in thousands):

 

December 31,

 

 

December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Leasehold improvements

 

$

16,594

 

 

$

3,061

 

 

$

17,231

 

 

$

16,594

 

Laboratory equipment

 

 

1,353

 

 

 

555

 

 

 

1,764

 

 

 

1,353

 

Furniture and fixtures

 

 

649

 

 

 

263

 

 

 

692

 

 

 

649

 

Computer equipment and software

 

 

41

 

 

 

27

 

 

 

34

 

 

 

41

 

Total property and equipment, gross

 

$

18,637

 

 

$

3,906

 

 

 

19,721

 

 

 

18,637

 

Less: accumulated depreciation

 

 

(789

)

 

 

(1,971

)

 

 

(2,883

)

 

 

(789

)

Total property and equipment, net

 

$

17,848

 

 

$

1,935

 

 

$

16,838

 

 

$

17,848

 

Total depreciation expense recognized for the years ended December 31, 2022 and 2021 and 2020 was $2.1$2.1 million and $0.7$2.1 million, respectively.

Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

 

 

December 31,

 

 

 

2022

 

 

2021

 

Accrued research and development expenses

 

$

7,720

 

 

$

2,404

 

Accrued compensation

 

 

5,299

 

 

 

3,573

 

Accrued professional services

 

 

394

 

 

 

1,274

 

Accrued construction costs

 

 

 

 

 

1,917

 

Other accrued expenses

 

 

35

 

 

 

82

 

Total accrued liabilities

 

$

13,448

 

 

$

9,250

 

 

 

December 31,

 

 

 

2021

 

 

2020

 

Accrued research and development expenses

 

$

2,404

 

 

$

3,260

 

Accrued compensation

 

 

3,573

 

 

 

2,543

 

Accrued professional services

 

 

1,274

 

 

 

524

 

Accrued construction costs

 

 

1,917

 

 

 

 

Other accrued expenses

 

 

82

 

 

 

170

 

Total accrued liabilities

 

$

9,250

 

 

$

6,497

 

5.
Commitments and Contingencies

Leases

5.

CommitmentsandContingencies

Leases

The Company leasedleases its offices and laboratory in South San Francisco, California, or the South San Francisco Lease, under a 7-year noncancelable lease agreement that ends in June 2024 with a 5-year renewal option. In December 2020, the Company entered into an agreement to lease office and laboratory space in Brisbane, California, or the Brisbane Lease, under a ten-year noncancelable lease agreement that ends in October 2031with an affiliate of the South San Francisco Lease landlord.The contractual term of the Brisbane Lease began in November 2021, for a ten-year term, with the Company’s option to extend for an additional ten years. The Brisbane Lease includes a rent-free period of three months starting in November 2021 and a tenant improvement allowance of $10.8 million. The Company records the tenant improvement allowance as a reduction to the ROU asset, which reduces rent expense over the lease term. In connection with the Brisbane Lease, the Company maintains a letter of credit in the amount of $1.0 million, which is included in restricted cash on the consolidated balance sheet. In May 2021, the Brisbane Lease commenced when the Company’s tenant improvements started.

Concurrent with the execution of the Brisbane Lease, the Company entered into an agreement to terminate the South San Francisco Lease, immediately effective when the tenant improvements of the Brisbane Lease were completed in December 2021. The South San Francisco Lease and the Brisbane Lease are accounted for as one lease with two lease components. Accordingly, upon adoption of Topic 842, the total consideration for the lease was reallocated to each lease component based on standalone selling price. As the Brisbane Lease commenced in May 2021, $1.3 million of the consideration allocated to the Brisbane Lease was recorded as a liability as of January 1, 2021 when the deferred rent balance of the South San Francisco Lease was derecognized.


renewable option. In November 2021, the Company subleased unoccupied space that has no immediate needs for the Company’s operations for two years starting from December 2021 for the aggregate sublease payments of $3.4$3.4 million. The sublease income, while it reduces the rent expense, is not considered in the value of the right-of-use assetassets or lease liability.liabilities. The Company’s sublease income was $0.1$1.6 million and $0.1 million for the year ended December 31, 2021.2022 and 2021, respectively.

In connection with the Brisbane Lease, the Company recognized operating lease right-of-use assets of $21.0 million as of the commencement date in May 2021, and lease liabilities of $22.2 million. As of December 31, 2021,2022, the operating lease right-of-use assets were $20.3$19.1 million and lease liabilities were $34.6$32.9 million in the consolidated balance sheet. The weighted average remaining lease term is 9.98.8 years.

The weighted average incremental borrowing rate used to measure the operating lease liability is 8.4%8.4%.

Operating lease cost for the yearyears ended December 31, 2022 and 2021 was $2.9 million.$2.1 million and $2.9 million, respectively. Variable lease payments for the yearyears ended December 31, 2022 and 2021 were $0.4 million. Rent expense for the year ended December 31, 2020 was $0.4 million.  $1.0 million and $0.4 million, respectively.

121


Future minimum lease payments and related lease liabilities as of December 31, 2021,2022, were as follows:

As of December 31:

 

(in thousands)

 

2022

 

$

4,203

 

 

(in thousands)

 

2023

 

 

4,742

 

 

$

4,198

 

2024

 

 

4,907

 

 

 

4,893

 

2025

 

 

5,079

 

 

 

5,065

 

2026 and thereafter

 

 

32,833

 

2026

 

 

5,242

 

2027 and thereafter

 

 

28,025

 

Total undiscounted lease payments

 

 

51,764

 

 

 

47,423

 

Less: Imputed interest

 

 

(17,175

)

 

 

(14,565

)

Total

 

 

34,589

 

 

$

32,858

 

The Company’s future undiscounted lease payments under non-cancellable operating leases (as defined by prior guidance) as of December 31, 2020 were as follows:

As of December 31:

 

(in thousands)

 

2021

 

$

618

 

2022

 

 

4,189

 

2023

 

 

4,756

 

2024

 

 

5,035

 

2025 and thereafter

 

 

38,332

 

Total

 

 

52,930

 

License andOther Agreements

InNovember November 2011,theCompanyenteredintoanexclusivelicensingagreement,, or theStanfordAgreement, withTheBoardofTrusteesoftheLelandStanfordJuniorUniversity, or Stanford,wherebytheCompanywas grantedanexclusive,worldwide,royalty-bearing,sublicensablelicense,undercertainpatentrights,or the LicensedPatents,tomake,use,offerforsale,sell,importandotherwisecommercializeproductscoveredby theLicensedPatentsforhumanoranimaldiseases,disordersorconditions.UndertheStanfordAgreement,the CompanymadeanupfrontpaymentandisobligatedtopayStanfordannuallicensemaintenancefees,potential future milestone payments totaling up to $milestonepaymentstotalingupto$500,000, androyaltypaymentsatarateequaltoalowsingle-digit percentageof worldwide net salesof licensedproducts. The Company did not achieve any milestones or make any milestone payments for the years ended December 31, 20212022 and 2020.2021.


In December 2016, the Company entered into a Sponsored Research Agreement with a not-for-profit entity to perform research on multiple sclerosis. The Sponsored Research Agreement was amended in March 2019. Under the terms of the Sponsored Research Agreement, as amended, the Company may receive up to $651,000$0.7 million in funding. If, within 15 years of the end of the Sponsored Research Agreement, the Company files a marketing authorization application for a product treating multiple sclerosis, the Company will be obligated to pay milestone payments up to four times the amounts received under the Sponsored Research Agreement. The Company has received $590,000$0.6 million in funding to date, including $135,000 received during the year ended December 31, 2021, which was recorded as interest and other income. The Company recognized NaNno income was recognized forduring the year ended December 31, 2020.2022 and $0.1 million in income during the year ended December 31, 2021.

Guarantees and IndemnificationsIndemnifications

In the normal course of business, the Company enters into agreements that contain a variety of representations and provide for general indemnification. The Company’s exposure under these agreements is unknown because it involves claims that may be made against the Company in the future. To date, the Company has 0tnot paid any claims or been required to defend any action related to its indemnification obligations. As of December 31, 2021,2022, the Company did 0tnot have any material indemnification claims or guarantees that were probable or reasonably possible and consequently has not recorded related liabilities.

6.
Stockholder’s Equity

Private Placement

On July 11, 2022, the Company sold in a private placement an aggregate of 9,013,834 shares of common stock, pre-funded warrants to purchase up to 24,696,206 shares of its common stock and accompanying common warrants to purchase up to 8,427,508 shares of its common stock. The offering price per share and accompanying common warrant was $3.87125 per share and the offering price per pre-funded warrant and accompanying common warrant was $3.87025 per share, which equals the per share offering price for the shares of common stock less the $0.001 exercise price for each such pre-funded warrant. The pre-funded warrants remain exercisable until exercised in full. The common warrants have an exercise price of $5.806875 per share and expire on June 30, 2025. The private placement resulted in net proceeds of $122.5 million, after deducting placement agent fees and expenses.

122


An entity related to one of the Company’s directors participated in the Private Placement and purchased 2,453,988 shares of common stock and accompanying common warrants to purchase up to an additional 613,497 shares of common stock for an aggregate price of approximately $9.5 million.

Both the pre-funded and common warrants are immediately exercisable, subject to beneficial ownership limitations. The Company may not effect the exercise of any pre-funded warrant, and a holder will not be entitled to exercise any portion of any pre-funded warrant that, upon giving effect to such exercise, would cause: (i) the aggregate number of shares of common stock beneficially owned by such holder, together with its affiliates, to exceed 9.99% of the total number of shares of common stock outstanding immediately after giving effect to the exercise or (ii) the combined voting power of the Company’s securities beneficially owned by such holder, together with its affiliates, to exceed 9.99% of the combined voting power of all of the Company’s securities immediately outstanding after giving effect to the exercise, which such percentage may be changed at the holder’s election to a higher or lower percentage not in excess of 19.99% upon at least 61 days’ notice to the Company. The Company may not effect the exercise of any common warrant, and a holder will not be entitled to exercise any portion of any common warrant that, upon giving effect to such exercise, would cause the aggregate number of shares of common stock beneficially owned by such holder, together with its affiliates, to exceed 4.99%, 9.99% or 19.99% (as applicable pursuant to the holder’s common warrant) of the total number of shares of common stock outstanding immediately after giving effect to the exercise, which such percentage may be changed at the holder’s election to a higher or lower percentage, including 9.99%, 14.99% or 19.99%, and not in excess of 19.99%, upon at least 61 days’ notice to the Company. The warrants meet the criteria for equity classification and were therefore recorded at fair value as of the grant date as a component of stockholders’ equity within additional paid-in capital.

As of December 31, 2022, no pre-funded or common warrants were exercised, and there were pre-funded and common warrants to purchase an aggregate of 33,123,714 shares of common stock outstanding. The 24,696,206 shares of common stock issuable upon the exercise of the pre-funded warrants and the 8,427,508 shares of common stock issuable upon the exercise of the common warrants are not included in the number of issued and outstanding shares of common stock as of December 31, 2022.

At-the-Market Offering

In August 2021, the Company entered into a sales agreement with Cowen and Company LLC, or Cowen, as sales agent, pursuant to which the Company may issue and sell shares of its common stock for an aggregate maximum offering price of $100.0 million under an at-the-market offering program, or 2021 ATM program. The Company will pay Cowen up to 3% of gross proceeds for the common stock sold through the 2021 ATM program. As of December 31, 2022, no shares of common stock had been sold under the 2021 ATM program. In February 2023, an entity related to one of the Company’s directors purchased 2,646,458 shares of common stock at a price of $6.80 per share through the 2021 ATM program, resulting in net proceeds to the Company of approximately $17.5 million, after deducting placement agent fees.

6.

Stockholder’s Equity

Common Stock

The holders of the Company’s common stock have one vote for each share of common stock. Common stockholders are entitled to dividends when, as, and if declared by the Board of Directors. The holders have no preemptive or other subscription rights and there are no redemption or sinking fund provisions with respect to such shares. As of December 31, 2021, 2022, no dividends had been declared by the Board of Directors.

123


The Company reserved the following shares of common stock for issuance as follows:

 

 

December 31,

 

 

 

2022

 

 

2021

 

Stock options issued and outstanding

 

 

8,152,093

 

 

 

5,662,824

 

Stock options reserved for 2020 Incentive Award Plan

 

 

478,109

 

 

 

2,039,951

 

Unvested restricted stock units outstanding

 

 

550,236

 

 

 

50,000

 

Common stock reserved for 2021 ATM program

 

 

5,265,929

 

 

 

5,265,929

 

Common stock reserved for Employee Stock Purchase
     Plan

 

 

994,257

 

 

 

729,775

 

Common stock reserved for Employment Inducement
    Award Plan

 

 

1,610,600

 

 

 

 

Common stock reserved for pre-funded warrants

 

 

24,696,206

 

 

 

 

Common stock reserved for common warrants

 

 

8,427,508

 

 

 

 

Total common stock reserved

 

 

50,174,938

 

 

 

13,748,479

 

 

 

December 31,

 

 

 

2021

 

 

2020

 

Options issued and outstanding

 

 

5,662,824

 

 

 

3,909,873

 

Reserve for 2020 Incentive Plan

 

 

2,039,951

 

 

 

2,707,947

 

Unvested restricted stock units outstanding

 

 

50,000

 

 

 

 

Common stock reserved for 2021 ATM program

 

 

5,265,929

 

 

 

 

Reserved for employee stock purchase plan

 

 

729,775

 

 

 

360,086

 

Total common stock reserved

 

 

13,748,479

 

 

 

6,977,906

 

7.
Equity Incentive Plan

At-the-Market Offering

In August 2021, the Company entered into a sales agreement with Cowen and Company LLC, or Cowen, as sales agent, pursuant to which the Company may issue and sell shares of its common stock for an aggregate maximum offering price of $100.0 million under an at-the-market offering program, or 2021 ATM program. The Company will pay Cowen up to 3% of gross proceeds for the common stock sold through the 2021 ATM program. As of December 31, 2021, 0 shares of common stock have been sold under the 2021 ATM program.

7.

Equity IncentivePlan

In July 2020, the Company’s board of directors and stockholders adopted and approved the 2020 Incentive Award Plan, or the 2020 Plan, and the Employee Stock Purchase Plan, or the ESPP, which became effective in connection with the IPO.

The Company may not grant any additional awards under the 2011 Equity Incentive Plan, or the 2011 Plan. The 2011 Plan will continue to govern outstanding equity awards granted thereunder.


2020 Equity Incentive Plan

The number of shares of common stock reserved for issuance under the 2020 Plan automatically increase on the first day of January, in an amount equal to 4%4% of the total number of shares of the Company’s capital stock outstanding on the last day of the preceding year, or a lesser number of shares determined by the Company’s board of directors.

Awards granted under the 2020 Plan expire no later than ten years from the date of grant. For the Incentive Stock Options, or ISOs, and Nonstatutory Stock Options, or NSOs, the option price shall not be less than 100%100% of the estimated fair value on the date of grant. Options granted typically vest over a four-year period but may be granted with different vesting terms. As of December 31, 2022 and 2021, there were 478,109 and 2,039,951 shares available for issuance under the 2020 Plan.Plan, respectively.

Stock options2022 Employment Inducement Award Plan

Stock option activity underIn July 2022, the Company’s board of directors adopted the Annexon, Inc. 2022 Employment Inducement Award Plan, or the Inducement Plan, and together with the 2011 Plan and the 2020 Plan, the Plans. The Inducement Plan was adopted by the Company’s board of directors without stockholder approval pursuant to Nasdaq Marketplace Rule 5635(c)(4), or Rule 5635(c)(4). In accordance with Rule 5635(c)(4), awards made under the Inducement Plan may only be granted to newly hired employees as follows:an inducement material to the employees entering into employment with the Company. Awards granted under the Inducement Plan expire no later than ten years from the date of grant. An aggregate of 2,000,000 shares of common stock were reserved for issuance under the Inducement Plan. As of December 31, 2022, there were 1,610,600 shares available for issuance under the Inducement Plan.

124


Stock options

 

 

Number of

Shares

 

 

Weighted-

Average

Exercise

Price Per

Share

 

 

Weighted-

Average

Remaining

Contractual

Term

(in years)

 

 

Aggregate

Intrinsic

Value

(in thousands)

 

Balances as of December 31, 2020

 

 

3,909,873

 

 

$

10.78

 

 

 

8.40

 

 

$

56,128

 

Additional shares authorized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stock options granted

 

 

2,871,400

 

 

$

25.54

 

 

 

 

 

 

 

 

 

Stock options exercised

 

 

(391,349

)

 

$

4.11

 

 

 

 

 

 

 

 

 

Stock options cancelled

 

 

(727,100

)

 

$

24.41

 

 

 

 

 

 

 

 

 

Balances as of December 31, 2021

 

 

5,662,824

 

 

$

16.98

 

 

 

8.26

 

 

$

10,186

 

Exercisable as of December 31, 2021

 

 

2,065,942

 

 

$

11.34

 

 

 

7.08

 

 

$

8,120

 

The following table presents stock option activity under the Plans for the period:

 

 

Number of
Shares

 

 

Weighted-
Average
Exercise
Price Per
Share

 

 

Weighted-
Average
Remaining
Contractual
Term
(in years)

 

 

Aggregate
Intrinsic
Value
(in thousands)

 

Balances as of December 31, 2021

 

 

5,662,824

 

 

$

16.98

 

 

 

8.26

 

 

$

10,186

 

Stock options granted

 

 

3,767,835

 

 

$

5.59

 

 

 

 

 

 

 

Stock options exercised

 

 

(15,364

)

 

$

5.28

 

 

 

 

 

 

 

Stock options forfeited

 

 

(1,263,202

)

 

$

15.78

 

 

 

 

 

 

 

Balances as of December 31, 2022

 

 

8,152,093

 

 

$

11.92

 

 

 

8.09

 

 

$

3,329

 

Exercisable as of December 31, 2022

 

 

3,406,230

 

 

$

12.87

 

 

 

6.94

 

 

$

1,428

 

The total intrinsic value of options exercised during the years ended December 31, 2022 and 2021 was $11,500and 2020 was $6.4 million and $0.2$6.4 million, respectively. The intrinsic value is the difference between the fair value of the Company’s common stock at the time of exercise and the exercise price of the stock option.

The weighted-average grant date fair value of options granted to employees during the years ended December 31, 2022 and 2021 was $3.94and 2020 was $18.83 and $12.33$18.83 per share, respectively.

As of December 31, 2021,2022, the total unrecognized stock-based compensation cost related to outstanding unvested stock options that are expected to vest was $51.9$37.4 million, which the Company expects to recognize over an estimated weighted-average period of 3.032.4 years.

Restricted Stock Units

RSUs are share awards that entitle the holder to receive freely tradeable shares of the Company’s common stock upon vesting. The RSUs cannot be transferred and the awards are subject to forfeiture if the holder’s employment terminates prior to the release of the vesting restrictions. The RSUs generally vest over a three-year period in equal amounts on an annual basis, provided the employee remains continuously employed with the Company. The fair value of the RSUs is equal to the closing price of the Company’s common stock on the grant date.



A summary of RSU activity under our equity incentive plan and related information is as follows:

 

 

Number of Shares

 

 

Weighted-Average Grant Date Fair Value Per Share

 

Unvested as of December 31, 2020

 

 

 

 

$

 

Granted

 

 

50,000

 

 

 

12.84

 

Unvested as of December 31, 2021

 

 

50,000

 

 

$

12.84

 

 

 

Number of Shares

 

 

Weighted-Average Grant Date Fair Value Per Share

 

Unvested as of December 31, 2021

 

 

50,000

 

 

$

12.84

 

Granted

 

 

604,583

 

 

 

5.40

 

Vested

 

 

(11,817

)

 

 

12.84

 

Cancelled

 

 

(92,530

)

 

 

7.37

 

Unvested as of December 31, 2022

 

 

550,236

 

 

$

5.58

 

As of December 31, 2021,2022, unrecognized stock-based compensation expense related to outstanding unvested RSUs was $0.6$2.4 million, which is expected to be recognized over a weighted-average period of 2.982.3 years.

Employee Stock Purchase Plan

The ESPP enables eligible employees to purchase shares of the Company's common stock at the end of each offering period at a price equal to 85%85% of the fair market value of the shares on the first business day or the last business day of the offering period, whichever is lower. Eligible employees generally included all employees. Share purchases are funded through payroll deductions of at least 1%1%, and up to 15%15% of an employee’s eligible compensation

125


for each payroll period. The number of shares reserved for issuance under the ESPP increase automatically on the first day of each fiscal year, by a number equal to, 1%1% of the shares of common stock outstanding on the last day of the immediately preceding fiscal year, or such number of shares determined by the Company’s board of directors. As of December 31, 2021, 729,7752022, 994,257 shares were available for future purchase. The ESPP generally provides for six-month consecutive offering periods beginning on May 15th and November 15th of each year. The ESPP is a compensatory plan as defined by the authoritative guidance for stock compensation. As such, stock-based compensation expense has been recorded for the years ended December 31, 20212022 and 2020.2021.

Stock-Based Compensation Expense

The total stock-based compensation expense recognized was as follows (in thousands):

 

 

Year Ended December 31,

 

 

 

2021

 

 

2020

 

Research and development

 

$

8,610

 

 

$

2,274

 

General and administrative

 

 

7,652

 

 

 

2,614

 

Total stock-based compensation expense

 

$

16,262

 

 

$

4,888

 

The stock-based compensation expense related to the ESPP for the years ended December 31, 2022 and 2021 and 2020 were $0.1was $0.1 million and $0.1$0.1 million, respectively.

Stock-Based Compensation Expense

The total stock-based compensation expense recognized was as follows (in thousands):

 

 

Year Ended
December 31,

 

 

 

2022

 

 

2021

 

Research and development

 

$

8,874

 

 

$

8,610

 

General and administrative

 

 

9,642

 

 

 

7,652

 

Total stock-based compensation expense

 

$

18,516

 

 

$

16,262

 

To determine the value of stock option awards for stock-based compensation purposes, the Company uses the Black-Scholes option pricing model and the assumptions discussed below. Each of these inputs is subjective and generally requires significant judgment.

Fair Value of Common Stock—StockHistorically, for all periods prior to the IPO in July 2020, fair values of the shares of common stock underlying the Company’s share-based awards were estimated on each grant date by the Company’s board of directors. The board of directors considered, among other things, valuations of the Company’s common stock which were prepared by an independent third-party valuation firm in accordance with the guidance provided by the American Institute of Certified Public Accountants 2013 Practice Aid, Valuation of Privately-Held-Company Equity Securities Issued as Compensation. After the completion of the IPO, the fair value of each share of underlying common stock is based on the closing price of the Company’s common stock as reported on the date of grant on the Nasdaq Global Select Market.

Expected Term—The Company’s expected term represents the period that the Company’s stock-based awards are expected to be outstanding. The Company’s historical share option exercise informationoutstanding and is limited due to a lack of sufficient data points, and did not provide a reasonable basis upon which to estimate an expected term.The expected


term for option grants is therefore determined using the simplified method (based on the mid-point between the vesting date and the end of the contractual term). The Company continues using the simplified method as it does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate expected term due to the limited period of time its equity shares have been publicly traded.

Expected Volatility—Because the Company does not have sufficient trading history for its common stock, the expected volatility was estimated based on the average volatility for comparable publicly traded life sciencesciences companies over a period equal to the expected term of the stock option grants. The comparable companies were chosen based on the similar size, stage in the life cycle or area of specialty. The Company will continue to apply this process until a sufficient amount of historical information regarding the volatility of its own stock price becomes available and to align with the Company’s expected term.

Risk-Free Interest Rate—The risk-free interest rate is based on the U.S. Treasury zero coupon issues in effect at the time of grant for periods corresponding with the expected term of the option.

Dividend Yield—The Company has never paid dividends on its common stock and hashave no plans to pay dividends on its common stock. Therefore, the Company used an expected dividend yield of zero.

The fair value of each awardstock option issued was estimated on the date of grant using the Black-Scholes option pricing model with the following assumptions:

 

 

Year Ended
December 31,

 

 

2022

 

2021

Expected term (in years)

 

5.50 - 6.08

 

4.33 - 6.08

Expected volatility

 

78.80% - 85.90%

 

88.30% - 90.70%

Risk-free interest rate

 

1.49% - 4.19%

 

0.35% - 1.31%

Dividend yield

 

 

126


 

 

Year Ended December 31,

 

 

 

2021

 

 

2020

 

Expected term (in years)

 

4.33-6.08

 

 

5.00-6.08

 

Expected volatility

 

88%-91%

 

 

85%-93%

 

Risk-free interest rate

 

0.35%-1.31%

 

 

0.33%-1.45%

 

Dividend yield

 

 

 

 

 

 

8.
Income Taxes

8.

Income Taxes

For financial reporting purposes, loss before provision for income taxes, includes the following components (in thousands):

 

Year Ended December 31,

 

 

Year Ended December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Domestic

 

$

130,313

 

 

$

63,406

 

 

$

(141,939

)

 

$

(130,313

)

Foreign

 

 

10

 

 

 

6

 

 

 

(8

)

 

 

(10

)

Loss before income taxes

 

$

130,323

 

 

$

63,412

 

 

$

(141,947

)

 

$

(130,323

)

For each of the years ended December 31, 20212022 and 2020,2021, the Company incurred insignificant amounts for an income tax provision. The U.S. federal and California deferred tax assets generated from the Company’s net operating losses have been fully reserved, as the Company believes it is not more likely than not that the benefit will not be realized.

Reconciliation of income tax computed at federal statutory rates to the reported provision for income taxes was as follows (in thousands):

 

 

Year Ended December 31,

 

 

 

2021

 

 

2020

 

Tax provision at U.S. statutory rate

 

$

(27,368

)

 

$

(13,316

)

Stock-based compensation

 

 

794

 

 

 

426

 

R&D tax credits

 

 

(2,392

)

 

 

(1,031

)

Change in valuation allowance

 

 

25,911

 

 

 

13,906

 

Section 382 limitations

 

 

2,922

 

 

 

 

Other

 

 

133

 

 

 

15

 

Provision for income taxes

 

$

 

 

$

 


Deferred Tax

 

 

Year Ended December 31,

 

 

 

2022

 

 

2021

 

Tax provision at U.S. statutory rate

 

$

(29,809

)

 

$

(27,368

)

Stock-based compensation

 

 

2,362

 

 

 

794

 

Research and development tax credits

 

 

(2,836

)

 

 

(2,392

)

Change in valuation allowance

 

 

30,148

 

 

 

25,911

 

Section 382 limitations

 

 

 

 

 

2,922

 

Other

 

 

135

 

 

 

133

 

Provision for income taxes

 

$

 

 

$

 

 

Deferred Tax Assets and Liabilities

Liabilities

The tax effects of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities are as follows (in thousands):

 

December 31,

 

 

December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Deferred Tax Assets:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Net operating loss carryforwards

 

$

57,073

 

 

$

36,922

 

 

$

63,551

 

 

$

57,073

 

Research and development credits

 

 

7,367

 

 

 

6,246

 

 

 

11,095

 

 

 

7,367

 

Other intangibles

 

 

5

 

 

 

5

 

 

 

4

 

 

 

5

 

Accruals and reserves

 

 

686

 

 

 

583

 

 

 

974

 

 

 

686

 

Stock-based compensation

 

 

3,041

 

 

 

995

 

 

 

4,551

 

 

 

3,041

 

Tenant improvement allowances

 

 

 

 

 

257

 

Capitalized research and development

 

 

19,744

 

 

 

 

Lease liabilities

 

 

7,340

 

 

 

 

 

 

6,946

 

 

 

7,340

 

Unrealized gain/loss on investments

 

 

240

 

 

 

 

 

 

 

 

 

240

 

Total gross deferred tax assets

 

 

75,752

 

 

 

45,008

 

 

 

106,865

 

 

 

75,752

 

Less: valuation allowance

 

 

(69,147

)

 

 

(44,745

)

 

 

(100,778

)

 

 

(69,147

)

Total deferred tax assets, net

 

$

6,605

 

 

$

263

 

 

$

6,087

 

 

$

6,605

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Deferred Tax Liabilities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fixed assets

 

$

(2,290

)

 

$

(263

)

 

$

(2,043

)

 

$

(2,290

)

Right-of-use assets

 

 

(4,315

)

 

 

 

 

 

(4,044

)

 

 

(4,315

)

Total gross deferred tax liabilities

 

 

(6,605

)

 

 

(263

)

 

 

(6,087

)

 

 

(6,605

)

Net deferred tax assets

 

$

 

 

$

 

 

$

 

 

$

 

127


As of December 31, 2021,2022, the Company had $257.9$286.5 million of federal and $70.7$71.1 million of state net operating loss, or NOL, carryforwards available to offset future taxable income. Under the Tax Cuts and Jobs Act of 2017, or the Tax Act, federal NOLs generated after December 31, 2017 will be carried forward indefinitely with the yearly NOL utilization limited to 80 percent% of taxable income. The Company had $197.1$243.4 million of such federal NOLs that do not expire. If not utilized, the federal carryforward losses generated prior to 2018 and the state carryforward losses will expire in various amounts beginning in 2031.2031.

As of December 31, 2021,2022, the Company had $7.3approximately $10.9 million of federal and $5.6$6.7 million of state credit carryforwards available to offset future taxable income. If not utilized, these credit carryforwards will expire in various amounts for federal purposes beginning in 2031.2031. The state credits do not expire.

In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. Management believes that, based on available evidence, both positive and negative, it is more likely than not that the deferred tax assets will not be utilized; therefore, a full valuation allowance has been recorded. The Company’s valuation allowance increased by $24.4$31.6 million and $14.8$24.4 million for the years ended December 31, 20212022 and 2020,2021, respectively. The changes in the 20212022 valuation allowance were primarily due to the addition of capitalized research and 2020development costs, current year loss carryforwards and research and development credits. The changes in the 2021 valuation allowance were primarily due to the addition of the current year loss carryforwards and research and development credits.

Utilization of the net operating loss carryforwards and credits may be subject to an annual limitation due to the ownership change limitations provided by the Internal Revenue Code of 1986, as amended, and similar state provisions. The annual limitations may result in the expiration of net operating losses and credits before utilization. The Company performed a Section 382 analysis through June 30,December 31, 2021. Federal net operating losses carryforwards of $257.8$286.4 million and state and local net operating loss carryforwards of $30.8$36.4 million are not expected to expire unutilized as a result of ownership changes identified through June 30,December 31, 2021. The Company has identified $0.1$0.1 million and $39.9$34.7 million of federal and state net operating losses, respectively, that will expire unused due to ownership changes, and federal credits of $3.7$3.7 million that will not be able to be utilized due to ownership change limitation; these amounts have been excluded from the deferred tax assets table above. Further ownership changes subsequent to December 31, 2021 may be identified which could result in limitations to the amount of net operating losses and credits which may be utilized prior to expiration.

Uncertain Tax Benefits


Uncertain TaxBenefits

The Company has the following activity relating to the gross amount of unrecognized tax benefits (in thousands):

 

Year Ended December 31,

 

 

Year Ended December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Beginning balance

 

$

1,576

 

 

$

1,116

 

 

$

1,794

 

 

$

1,576

 

Decreases based on tax positions related to

prior year

 

 

(789

)

 

 

 

 

 

 

 

 

(789

)

Additions based on tax positions related to

current year

 

 

1,007

 

 

 

460

 

 

 

932

 

 

 

1,007

 

Ending balance

 

$

1,794

 

 

$

1,576

 

 

$

2,726

 

 

$

1,794

 

NaNNone of these uncertain tax positions will impact the Company’s effective tax rate if assessed. The Company’s policy is to classify interest and penalties associated with unrecognized tax benefits as income tax expense. The Company had 0no interest or penalty accruals associated with uncertain tax benefits in its consolidated balance sheet and consolidated statement of operations for the years ended December 31, 20212022 and 2020.2021. The Company files income tax returns in the US,United States, California, Georgia, Indiana, Maryland, Massachusetts, Nebraska, New Jersey, North Carolina, Pennsylvania, Texas and in Australia. The Company is not currently under examination by any major tax jurisdictions nor has it been in the past. The tax years 2011 through 20212022 remain effectively open for examination by the Internal Revenue Service and most state tax authorities.authorities because of net operating losses and credit carryovers.

128


Although it is reasonably possible that certain unrecognized tax benefits may increase or decrease within the next 12twelve months due to tax examination changes, settlement activities, expirations of statute of limitations, or the impact on recognition and measurement considerations related to the results of published tax cases or other similar activities, the Company does not anticipateanticipated any significant changes to unrecognized tax benefits over the next 12 months.

9.

Net Loss Per Share Attributableto Common Stockholders

9.
Net Loss Per Share Attributable to Common Stockholders

As theThe Company was in a loss position for all periods presented,calculates basic net loss per share isby dividing net loss by the same asweighted-average number of shares of common stock outstanding, excluding restricted common stock. The weighted-average number of shares of common stock used in the basic and diluted net loss per share calculation include the pre-funded warrants issued in connection with the Private Placement as the pre-funded warrants are exercisable at any time for nominal cash consideration. As of December 31, 2022, no pre-funded warrants have been exercised and there were pre-funded warrants to purchase an aggregate of 24,696,206 shares of common stock outstanding. The Company has generated a net loss in all periods presented, so the basic and diluted net loss per share are the same, as the inclusion of all potential commonthe potentially dilutive securities outstanding would have been anti-dilutive.be anti-dilutive.

The following outstanding potentially dilutive shares have been excluded from the calculation of diluted net loss per share due to their anti-dilutive effect:

 

Year Ended December 31,

 

 

Year Ended
December 31,

 

 

2021

 

 

2020

 

 

2022

 

 

2021

 

Stock options to purchase common stock

 

 

5,662,824

 

 

 

3,909,873

 

 

 

8,152,093

 

 

 

5,662,824

 

Shares subject to employee stock purchase plan

 

 

15,924

 

 

 

275

 

Shares subject to Employee Stock Purchase Plan

 

 

46,297

 

 

 

15,924

 

Unvested restricted stock units

 

 

50,000

 

 

 

 

 

 

550,236

 

 

 

50,000

 

Common warrants to purchase common stock

 

 

8,427,508

 

 

 

 

Total

 

 

5,728,748

 

 

 

3,910,148

 

 

 

17,176,134

 

 

 

5,728,748

 

129



Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

None.

Item 9A. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

As of December 31, 2021,2022, our management, with the participation and supervision of our Chief Executive Officer and our Chief Financial Officer, have evaluated our 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). Based on that evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that, as of the December 31, 2021,2022, our disclosure controls and procedures are effective to provide reasonable assurance that information we are required to disclose in reports that 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 Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosures.

Management’s Annual Report on Internal Control over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Our internal control over financial reporting is 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.

Management has evaluated the effectiveness of our internal control over financial reporting as of December 31, 20212022 using the criteria set forth in the 2013 Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on its evaluation, management has concluded that our internal control over financial reporting was effective as of December 31, 2021.2022.

The effectivenessThis Annual Report on Form 10-K does not include an attestation report of our internal control over financial reporting as of December 31, 2021 has been audited by KPMG LLP, anthe Company’s independent registered public accounting firm as statedregarding internal control over financial reporting. Pursuant to rules of the SEC, such attestation is not required for smaller reporting companies, which permit the Company to provide only management’s report in their report which appears in Item 8 of this Annual Report on Form 10-K.

Changes in Internal Control over Financial Reporting

During our quarter ended March 31, 2021, we launched the NetSuite enterprise resource planning system, or ERP, to support our financial reporting. The implementation of the ERP resulted primarily in changes to reports, interfaces and IT dependent controls. Therefore, we have modified the design and documentation of internal control processes and procedures relating to the new systems to enhance existing internal controls. The system changes were undertaken as an ongoing business initiative to improve and enhance our internal control over financial reporting.

Except as described in the previous paragraph, we identifiedThere was no changeschange in our internal control over financial reporting (as defined in Exchange Act RulesRule 13a-15(f) and 15d-15(f)) under the Exchange Act) during the quarter ended December 31, 20212022 that have materially affected, or areis reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitation on the Effectiveness of Internal Controls and Procedures

Our management, including our Chief Executive Officer and Chief Financial Officer, does not expect that our disclosure controls or our internal control over financial reporting will prevent all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, 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 the 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 policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

130


Item 9B. Other Information.

None.

Item 9C. Disclosure Regarding Foreign Jurisdictions That Prevent Inspections.

Not applicable.


131


PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Information required by this item will be contained in our definitive proxy statement to be filed with the Securities and Exchange Commission on Schedule 14A in connection with our 20222023 Annual Meeting of Stockholders, or the Proxy Statement, which will be filed no later than 120 days after the end of our fiscal year ended December 31, 20212022 and is incorporated herein by reference.

We have adopted a Code of Business Conduct and Ethics that applies to our officers, directors and employees which is available on our website at ir.annexonbio.com. The Code of Business Conduct and Ethics is intended to qualify as a “code of ethics” within the meaning of Section 406 of the Sarbanes-Oxley Act of 2002 and Item 406 of Regulation S-K. In addition, we intend to promptly disclose (1) the nature of any amendment to our Code of Business Conduct and Ethics that applies to our directors or our principal executive officer, principal financial officer, principal accounting officer or controller or persons performing similar functions and (2) the nature of any waiver, including an implicit waiver, from a provision of our code of ethics that is granted to a director one of these specified officers, the name of such person who is granted the waiver and the date of the waiver on our website in the future.

The remaining information required by this item will be contained in our definitive proxy statement to be filed with the Securities and Exchange Commission on Schedule 14A in connection with our 20222023 Annual Meeting of Stockholders, or the Proxy Statement, which will be filed no later than 120 days after the end of our fiscal year ended December 31, 20212022 and is incorporated herein by reference.

Item 11. Executive Compensation.

The information required by this item regarding executive compensation will be incorporated by reference to the information set forth in our Proxy Statement.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required by this item regarding security ownership of certain beneficial owners and management and our equity compensation plans will be incorporated by reference to the information set forth in our Proxy Statement.

The information required by this item regarding certain relationships and related transactions and director independence will be incorporated by reference to the information set forth in our Proxy Statement.

Item 14. Principal Accountant Fees and Services.

The information required by this item regarding principal accountant fees and services will be incorporated by reference to the information set forth in our Proxy Statement.


132


PART IV

Item 15. Exhibits, Financial Statement Schedules.

(a) The following documents are filed as part of this report:

1. Financial Statements

Information in response to this Item is included in Part II, Item 8 of this Annual Report on Form 10-K.

2. Financial Statement Schedules

All schedules are omitted because they are not applicable or the required information is shown in the financial statements or notes thereto.

3. Exhibits

Exhibit Index

Exhibit

No

 

Description of Exhibit

 

Incorporated by Reference

 

 

 

 

Form

 

File No.

 

Exhibit

 

Filing Date

 

Filed

Herewith

 

 

 

 

 

 

 

 

 

 

  3.1

 

Amended and Restated Certificate of Incorporation.

 

8-K

 

001-39402

 

3.1

 

07/28/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  3.2

 

Amended and Restated Bylaws.

 

8-K

 

001-39402

 

3.2

 

07/28/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  4.1

 

Reference is made to Exhibits 3.1 through 3.2.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  4.2

 

Form of Common Stock Certificate.

 

S-1

 

333-239647

 

4.2

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  4.3

 

Description of Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934.

 

 

 

 

 

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

10.1

 

Amended and Restated Investors’ Rights Agreement, dated June 30, 2020, by and among the Registrant and the investors listed therein.

 

S-1

 

333-239647

 

10.1

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.2†

 

Exclusive (Equity) Agreement, dated November 21, 2011, by and between the Registrant and The Board of Trustees of the Leland Stanford Junior University.

 

S-1

 

333-239647

 

10.2

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.3

 

Lease, dated December 19, 2016, by and between the Registrant and Bayside Acquisition, LLC.

 

S-1

 

333-239647

 

10.3

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.4

 

Lease, dated December 18, 2020, by and between the Registrant and HCP LS Brisbane, LLC.

 

8-K

 

001-39402

 

10.1

 

12/22/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.5(a)+

 

2011 Incentive Award Plan.

 

S-1/A

 

333-239647

 

10.4(a)

 

07/20/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.5(b)+

 

Form of Stock Option Agreement under 2011 Equity Incentive Plan.

 

S-1

 

333-239647

 

10.4(b)

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.6(a)+

 

2020 Incentive Award Plan.

 

S-8

 

333-240101

 

99.2(a)

 

07/24/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Exhibit

No

 

Description of Exhibit

 

Incorporated by Reference

 

 

 

 

Form

 

File No.

 

Exhibit

 

Filing Date

 

Filed

Herewith

 

 

 

 

 

 

 

 

 

 

10.6(b)+

 

Form of Stock Option Grant Notice and Stock Option Agreement under the 2020 Incentive Award Plan.

 

S-1

 

333-239647

 

10.5(b)

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.6(c)+

 

Form of Restricted Stock Award Grant Notice and Restricted Stock Award Agreement under the 2020 Incentive Award Plan.

 

S-1

 

333-239647

 

10.5(c)

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.6(d)+

 

Form of Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement under the 2020 Incentive Award Plan.

 

S-1

 

333-239647

 

10.5(d)

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.7+

 

Employee Stock Purchase Plan.

 

S-8

 

333-240101

 

99.3

 

07/24/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.8+

 

Employment Agreement by and between the Registrant and Douglas Love, Esq.

 

S-1

 

333-239647

 

10.7

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.9+

 

Employment Agreement by and between the Registrant and Sanjay Keswani, MBBS, BSc, FRCP.

 

S-1

 

333-239647

 

10.8

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.10+

 

Employment Agreement by and between the Registrant and Jennifer Lew.

 

S-1

 

333-239647

 

10.9

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.11+

 

Employment Agreement by and between the Registrant and Ted Yednock, Ph.D.

 

S-1

 

333-239647

 

10.10

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.12+

 

Employment Agreement by and between the Registrant and Michael Overdorf.

 

S-1/A

 

333-239647

 

10.11

 

07/20/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.13+

 

Non-Employee Director Compensation Program.

 

S-1/A

 

333-239647

 

10.12

 

07/20/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.14

 

Form of Indemnification and Advancement Agreement for directors and officers

 

S-1

 

333-239647

 

10.12

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.15+

 

Employment Agreement by and between the Registrant and Larry Mattheakis, Ph.D.

 

10-Q

 

001-39402

 

10.2

 

11/09/2021

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.16

 

Sales Agreement, dated as of August 16, 2021, by and between Annexon Inc. and Cowen and Company, LLC.

 

10-Q

 

001-39402

 

10.15

 

08/16/2021

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21.1

 

List of subsidiaries.

 

S-1

 

333-239647

 

21.1

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23.1

 

Consent of KPMG LLP, independent registered public accounting firm.

 

 

 

 

 

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

24.1

 

Power of Attorney (included in the signature page hereto).

 

 

 

 

 

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

31.1

 

Certification of the Principal Executive Officer Pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a).

 

 

 

 

 

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

31.2

 

Certification of the Principal Financial Officer Pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a).

 

 

 

 

 

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 


Exhibit

No

 

Description of Exhibit

 

Incorporated by Reference

 

 

 

 

 

 

Form

 

File No.

 

Exhibit

 

Filing Date

 

Filed

Herewith

 

 

 

 

 

 

 

 

 

 

  3.1

 

Amended and Restated Certificate of Incorporation.

 

8-K

 

001-39402

 

3.1

 

07/28/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  3.2

 

Amended and Restated Bylaws.

 

8-K

 

001-39402

 

3.2

 

07/28/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  4.1

 

Reference is made to Exhibits 3.1 through 3.2.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  4.2

 

Form of Common Stock Certificate.

 

S-1

 

333-239647

 

4.2

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  4.3

 

Description of Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934.

 

10-K

 

001-39402

 

4.3

 

03/01/22

 

 

  4.4

 

Form of Pre-Funded Warrant.

 

8-K

 

001-39402

 

4.1

 

07/08/22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  4.5

 

Form of Common Warrant.

 

8-K

 

001-39402

 

4.2

 

07/08/22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.1

 

Amended and Restated Investors’ Rights Agreement, dated June 30, 2020, by and among the Registrant and the investors listed therein.

 

S-1

 

333-239647

 

10.1

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.2†

 

Exclusive (Equity) Agreement, dated November 21, 2011, by and between the Registrant and The Board of Trustees of the Leland Stanford Junior University.

 

S-1

 

333-239647

 

10.2

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.3

 

Lease, dated December 18, 2020, by and between the Registrant and HCP LS Brisbane, LLC.

 

8-K

 

001-39402

 

10.1

 

12/22/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.4(a)+

 

2011 Incentive Award Plan.

 

S-1/A

 

333-239647

 

10.4(a)

 

07/20/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.4(b)+

 

Form of Stock Option Agreement under 2011 Equity Incentive Plan.

 

S-1

 

333-239647

 

10.4(b)

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.5(a)+

 

2020 Incentive Award Plan.

 

S-8

 

333-240101

 

99.2(a)

 

07/24/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

133


Exhibit

No

 

Description of Exhibit

 

Incorporated by Reference

 

 

 

 

 

 

Form

 

File No.

 

Exhibit

 

Filing Date

 

Filed

Herewith

 

 

 

 

 

 

 

 

 

 

 10.5(b)+

 

Form of Stock Option Grant Notice and Stock Option Agreement under the 2020 Incentive Award Plan.

 

S-1

 

333-239647

 

10.5(b)

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.5(c)+

 

Form of Restricted Stock Award Grant Notice and Restricted Stock Award Agreement under the 2020 Incentive Award Plan.

 

S-1

 

333-239647

 

10.5(c)

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.5(d)+

 

Form of Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement under the 2020 Incentive Award Plan.

 

S-1

 

333-239647

 

10.5(d)

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.6+

 

Employee Stock Purchase Plan.

 

S-8

 

333-240101

 

99.3

 

07/24/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.7+

 

Employment Agreement by and between the Registrant and Douglas Love, Esq.

 

S-1

 

333-239647

 

10.7

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.8+

 

Employment Agreement by and between the Registrant and Jennifer Lew.

 

S-1

 

333-239647

 

10.9

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.9+

 

Employment Agreement by and between the Registrant and Michael Overdorf.

 

S-1/A

 

333-239647

 

10.11

 

07/20/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.10+

 

Non-Employee Director Compensation Program.

 

10-Q

 

001-39402

 

10.1

 

05/09/22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.11+

 

Form of Indemnification and Advancement Agreement for directors and officers.

 

S-1

 

333-239647

 

10.12

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.12+

 

Employment Agreement by and between the Registrant and Dean Richard Artis, Ph.D.

 

 

 

 

 

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.13

 

Sales Agreement, dated as of August 16, 2021, by and between Annexon Inc. and Cowen and Company, LLC.

 

10-Q

 

001-39402

 

10.1

 

08/16/21

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.14

 

Securities Purchase Agreement, dated July 7,

2022, by and among the Registrant and the

Purchasers named within.

 

8-K

 

001-39402

 

10.1

 

07/08/22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.15+

 

Annexon, Inc. 2022 Employment Inducement

Award Plan.

 

10-Q

 

001-39402

 

10.2(a)

 

08/08/22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.16+

 

Form of Stock Option Grant Notice and Stock Option Agreement under the 2022

Employment Inducement Award Plan.

 

10-Q

 

001-39402

 

10.2(b)

 

08/08/22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 10.17+

 

Form of Restricted Stock Unit Award Grant

Notice and Restricted Stock Unit Award

Agreement under the 2022 Employment

Inducement Award Plan.

 

10-Q

 

001-39402

 

10.2(c)

 

08/08/22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 21.1

 

List of subsidiaries.

 

S-1

 

333-239647

 

21.1

 

07/02/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 23.1

 

Consent of Independent Registered Public Accounting Firm.

 

 

 

 

 

 

 

 

 

X

 

 

 

 

 

 

 

 

 

 

 

 

 

134


Exhibit

No

Description of Exhibit

Incorporated by Reference

Form

File No.

Exhibit

Filing Date

Filed

Herewith

32.1*

Form

File No.

Exhibit

Filing Date

Filed

Herewith

 24.1

Power of Attorney (included in the signature page hereto).

X

 31.1

Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as amended.

X

 31.2

Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as amended.

X

 32.1*

Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.2002, as amended.

X

101.INS

Inline XBRL Instance Document

X

101.SCH

Inline XBRL Taxonomy Extension Schema Document

X

101.CAL

Inline XBRL Taxonomy Extension Calculation Linkbase Document

X

101.DEF

Inline XBRL Taxonomy Extension Definition Linkbase Document

X

101.LAB

Inline XBRL Taxonomy Extension Label Linkbase Document

X

101.PRE

Inline XBRL Taxonomy Extension Presentation Linkbase Document

X

104

Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

X

+

Indicates management contract or compensatory plan.

Certain portions of this document that constitute confidential information have been redacted in accordance with Regulation S-K, Item 601(b)(10).

*

X

+ Indicates management contract or compensatory plan.

† Certain portions of this document that constitute confidential information have been redacted in accordance with Regulation S-K, Item 601(b)(10).

* The certification attached as Exhibit 32.1 that accompanies this Annual Report on Form 10-K pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, is not deemed “filed” by the Registrant for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

Item 16. Form 10-K Summary

None.


SIGNATURES135


SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

Annexon, Inc.

Date: March 1, 20226, 2023

By:

/s/ Douglas Love, Esq.

Douglas Love, Esq.

President and Chief Executive Officer

(Principal Executive Officer)

Date: March 1, 20226, 2023

By:

/s/ Jennifer Lew

Jennifer Lew

Executive Vice President and Chief Financial Officer

(Principal Financial and Accounting Officer)


136


POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints each of Douglas Love and Jennifer Lew his or her true and lawful attorney-in-fact and agent, with full power of substitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on behalf of the Registrant in the capacities and on the dates indicated.

Name

Title

Date

Name

Title

Date

/s/ Douglas Love, Esq.

/s/ Douglas Love, Esq.

 President, Chief Executive Officer and Director

March 1, 20226, 2023

Douglas Love, Esq.

 (Principal Executive Officer)

/s/ Jennifer Lew

 Executive Vice President and Chief Financial Officer

March 1, 20226, 2023

Jennifer Lew

 (Principal Financial and Accounting Officer)

/s/ Thomas G. Wiggans

 Chairperson & Director

 March 6, 2023

Thomas G. Wiggans

Chairperson & Director

March 1, 2022

Thomas G. Wiggans

/s/ William H. Carson, M.D.

 Director

 March 6, 2023

/s/ William H. Carson, M.D.

Director

March 1, 2022

William H. Carson, M.D.

/s/ Jung E. Choi

Director

March 1, 20226, 2023

Jung E. Choi

/s/ Bettina M. Cockroft, M.D.

Director

March 1, 20226, 2023

Bettina M. Cockroft, M.D.

/s/ Muneer A. Satter

Director

March 1, 20226, 2023

Muneer A. Satter

/s/ William D. Waddill

Director

��

March 1, 20226, 2023

William D. Waddill

139137