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As filed with the Securities and Exchange Commission on July 11,12, 2022
Registration No. 333-  ��� ​
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
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FormFORM S-3
REGISTRATION STATEMENT

UNDER
THE SECURITIES ACT OF 1933
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HOOKIPA PHARMA INC.
(Exact name of registrant as specified in its charter)
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Delaware​
(State or other jurisdiction of
of incorporation or organization)​
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81-5395687​
(I.R.S. Employer
Identification Number)
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350 Fifth Avenue, 72nd Floor, Suite 7240
New York, New York 10118
+43 1 890 63 60
(Address, including zip code, and telephone number, including area code of registrant’s principal executive offices)
Joern Aldag
Chief Executive Officer
HOOKIPA Pharma Inc.
350 Fifth Avenue, 72nd Floor, Suite 7240
New York, New York 10118
+43 1 890 63 60
(Address,Name, address, including zip code, and telephone number, including area code, of agent for service)
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Copies to:
Robert E. Puopolo, Esq.
SeoSiavosh Salimi, Esq.Esq
Goodwin Procter LLP
100 Northern Avenue
Boston, Massachusetts 02210
(617) 570-1000
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APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:From time to time after the effective date of this registration statement.Registration Statement
(Approximate date of commencement of proposed sale to the public)
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If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ☐
If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. ☒
If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐
If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐
If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐
If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐
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.
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Large accelerated filer
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Accelerated filer
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Non-accelerated filer
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Smaller reporting company
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Emerging growth company
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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 7(a)(2)(B) of the Securities Act. ☒
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The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment that specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until this registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.
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EXPLANATORY NOTE
This registration statement contains:
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a base prospectus which covers the offering, issuance and sale by the registrant of up to a maximum aggregate offering price of $200,000,000 of the registrant’s common stock, preferred stock, debt securities, warrants and/or units; and
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a sales agreement prospectus covering the offering, issuance and sale by the registrant of up to a maximum aggregate offering price of $50,000,000 of the registrant’s common stock that may be issued and sold from time to time under a sales agreement with SVB Securities LLC.
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The base prospectus immediately follows this explanatory note. The specific terms of any securities to be offered pursuant to the base prospectus will be specified in a prospectus supplement to the base prospectus. The sales agreement prospectus immediately follows the base prospectus. The $50,000,000 of common stock that may be offered, issued and sold by the registrant under the sales agreement prospectus is included in the $200,000,000 of securities that may be offered, issued and sold by the registrant under the base prospectus.

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The information contained in this prospectus is not complete and may be changed. The selling stockholder named in this prospectusWe may not sell these securities or accept an offer to buy these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities, and it is not soliciting an offeroffers to buy these securities in any state where thesuch offer or sale is not permitted.
Subject to Completion, Dated July 11,SUBJECT TO COMPLETION, DATED JULY 12, 2022
PROSPECTUS
$200,000,000
[MISSING IMAGE: lg_hookipapharma-4c.jpg]
HOOKIPA Pharma Inc.Common Stock
1,666,666 Shares of CommonPreferred Stock
Offered by the Selling StockholderDebt Securities
Warrants
Units
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This prospectus relatesFrom time to time, we may offer up to $200,000,000 of any combination of the proposed resale or other disposition by the selling stockholder identifiedsecurities described in this prospectus of up to an aggregate of 1,666,666 shares of common stock, par value $0.0001 per share, of HOOKIPA Pharma Inc., of which 1,666,666 shares are presently issued and outstanding. The shares being offered were issued and sold to Gilead Sciences, Inc., or Gilead, in a private placement, or the 2022 Private Placement, which closed on February 15, 2022. We are not selling any shares of common stock under this prospectus and will not receive any of the proceeds from the sale or other disposition of common stock by the selling stockholder.
We have agreed, pursuant to a registration rights agreement that we have entered into with the selling stockholder, to bear all of the expenses incurred in connection with the registration of these shares. The selling stockholder will pay or assume discounts, commissions, fees of underwriters, selling brokers or dealer managers and similar expenses, if any, incurred for the sale of these shares of our common stock.
The selling stockholder may sell the shares of common stock on any national securities exchange or quotation service on which the securities may be listed or quoted at the time of sale, in the over-the-counter market, in one or more transactions otherwise than on these exchangesofferings. We may also offer securities as may be issuable upon conversion, redemption, repurchase, exchange or systems, such as privately negotiated transactions, or usingexercise of any securities registered hereunder, including any applicable anti-dilution provisions.
This prospectus provides a combination of these methods, and at fixed prices, at prevailing market prices at the timegeneral description of the sale, at varying prices determined at thesecurities we may offer. Each time of sale, or at negotiated prices. See the disclosure under the heading “Plan of Distribution” elsewhere in this prospectus for more information about how the selling stockholder may sell or otherwise dispose of its shares of common stock hereunder.
The selling stockholder may sell any, all or nonewe offer securities, we will provide specific terms of the securities offered byin a supplement to this prospectus. We may also authorize one or more free writing prospectuses to be provided to you in connection with these offerings. The prospectus supplement and any related free writing prospectus may also add, update or change information contained in this prospectus. You should carefully read this prospectus, the applicable prospectus supplement and we do not know when orany related free writing prospectus, as well as any documents incorporated by reference, before you invest in what amount the selling stockholder may sell its shares of common stock hereunder following the effective dateany of the registration statementsecurities being offered.
This prospectus may not be used to consummate a sale of which thisany securities unless accompanied by a prospectus forms a part.supplement.
Our common stock is listedtraded on Thethe Nasdaq Global Select Market under the symbol “HOOK.” On July 8,11, 2022, the last reported sale price of our common stock was $1.84 per share. The applicable prospectus supplement will contain information, where applicable, as to any other listing on Thethe Nasdaq Global Select Market was $1.87 per share.or any securities market or other exchange of the securities, if any, covered by the prospectus supplement.
We may sell these securities directly to investors, through agents designated from time to time, or to or through underwriters or dealers, on a continuous or delayed basis. For additional information on the methods of sale, you should refer to the section entitled “Plan of Distribution” in this prospectus. If any agents or underwriters are involved in the sale of any securities with respect to which this prospectus is being delivered, the names of such agents or underwriters and any applicable fees, commissions, discounts or over-allotment options will be set forth in a prospectus supplement. The price to the public of such securities and the net proceeds we expect to receive from such sale will also be set forth in a prospectus supplement.
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Investing in our common stocksecurities involves a high degree of risk. Before making an investment decision, please readYou should review carefully the informationrisks and uncertainties described under the heading “Risk Factors” beginning on page 8 of this“Risk Factors” contained in the applicable prospectus supplement and any related free writing prospectus, and under similar headings in the other documents that are incorporated by reference into this prospectus.
Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracyprospectus as described on page 4 of this prospectus. Any representation to the contrary is a criminal offense.
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NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
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The date of this prospectus is                 , 2022.
TABLE OF CONTENTS​
 
TABLE OF CONTENTSTable of Contents
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About this ProspectusABOUT THIS PROSPECTUS
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HOOKIPA PHARMA INC.
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THE COMPANYRISK FACTORS
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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
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THE OFFERINGUSE OF PROCEEDS
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Risk FactorsDESCRIPTION OF CAPITAL STOCK
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USEDESCRIPTION OF PROCEEDSDEBT SECURITIES
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Selling StockholderDESCRIPTION OF WARRANTS
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Plan of DistributionDESCRIPTION OF UNITS
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Legal MattersPLAN OF DISTRIBUTION
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​Experts​​​​15​​
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Where You Can Find More Information; INCORPORATION BY REFERENCELEGAL MATTERS
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EXPERTS
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WHERE YOU CAN FIND MORE INFORMATION
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INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
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ABOUT THIS PROSPECTUS
This prospectus is a part of a registration statement on Form S-3 that we filed with the U.S. Securities and Exchange Commission, or the SEC, utilizing a “shelf” registration process. Under this shelf registration process, we may sell any combination of the selling stockholder may, from time to time, sell the shares of common stocksecurities described in this prospectus in one or more offerings up to a total aggregate offering price of $200,000,000. This prospectus provides you with a general description of the securities we may offer.
Each time we sell securities under this prospectus, we will provide a prospectus supplement that will contain specific information about the terms of that offering. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to these offerings. The prospectus supplement and any related free writing prospectus that we may authorize to be provided to you may also add, update or change information contained in this prospectus or in any documents that we have incorporated by reference into this prospectus. You should read this prospectus, any applicable prospectus supplement and any related free writing prospectus, together with the information incorporated herein by reference as described under the heading “Incorporation of Certain Information by Reference,” before investing in any of the securities offered.
THIS PROSPECTUS MAY NOT BE USED TO CONSUMMATE A SALE OF SECURITIES UNLESS IT IS ACCOMPANIED BY A PROSPECTUS SUPPLEMENT.
Neither we, nor the selling stockholder, haveany agent, underwriter or dealer has authorized anyoneany person to give any information or to make any representation other than those contained or incorporated by reference in this prospectus. You must not rely uponprospectus, any informationapplicable prospectus supplement or representation not containedany related free writing prospectus prepared by or incorporated by reference in this prospectus. The selling stockholder is offeringon behalf of us or to sell, and seeking offers to buy, shares of our common stock only in jurisdictions where it is lawful to do so.which we have referred you. This prospectus, doesany applicable supplement to this prospectus or any related free writing prospectus do not constitute an offer to sell or the solicitation of an offer to buy any sharessecurities other than the registered sharessecurities to which it relates,they relate, nor doesdo this prospectus, any applicable supplement to this prospectus or any related free writing prospectus constitute an offer to sell or the solicitation of an offer to buy sharessecurities in any jurisdiction to any person to whom it is unlawful to make such offer or solicitation in such jurisdiction.
You should not assume that the information contained in this prospectus, any applicable prospectus supplement or any related free writing prospectus is accurate on any date subsequent to the date set forth on the front of the document or that any information we have incorporated by reference is correct on any date subsequent to the date of the document incorporated by reference, even though this prospectus, any applicable prospectus supplement or any related free writing prospectus is delivered, or sharessecurities are sold, on a later date. Our business, financial condition, results of operations and prospects may have changed since those dates.
This prospectus incorporatesand the information incorporated herein by reference market data and industry statistics and forecasts thatcontains summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are based on independent industry publications and other publicly available information. Although we believe these sources are reliable, we do not guaranteequalified in their entirety by the accuracyactual documents. Copies of some of the documents referred to herein have been filed, will be filed or completeness of this information and we have not independently verified this information. In addition, the market and industry data and forecasts that maywill be included or incorporated by reference inas exhibits to the registration statement of which this prospectus is a part, and you may involve estimates, assumptions and other risks and uncertainties and are subject to change based on various factors, includingobtain copies of those discussed under the heading “Risk Factors” contained in this prospectus, and under similar headings in other documents that are incorporated by reference into this prospectus. Accordingly, investors should not place undue reliance on this information.
A prospectus supplement may add to, update or change the information contained in this prospectus. You should read both this prospectus and any applicable prospectus supplement together with additional informationas described below under the heading “Where You Can Find AdditionalMore Information.”
When we refer to “HOOKIPA,” “we,” “our,” “us” and the “Company” in this prospectus, we mean HOOKIPA Pharma Inc., unless otherwise specified. When we refer to “you,” we mean the potential holders of the applicable series of securities.
 
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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This prospectus and the documents incorporated by reference contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Any statements about our expectations, beliefs, plans, objectives, assumptions or future events or performance are not historical facts and may be forward-looking. These statements are often, but are not always, made through the use of words or phrases such as “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will,” “would,” and similar expressions, or the negative of these terms, or similar expressions. Accordingly, these statements involve estimates, assumptions and uncertainties which could cause actual results to differ materially from those expressed in them. Any forward-looking statements are qualified in their entirety by reference to the factors discussed throughout this prospectus, and in particular those factors referenced in the section “Risk Factors.”
This prospectus contains forward-looking statements that are based on our management’s belief and assumptions and on information currently available to our management. These statements relate to future events or our future financial performance, and involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. Forward-looking statements include, but are not limited to, statements about:
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our expectations related to the use of proceeds from this offering;
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the success, cost and timing of our product development activities and clinical trials;
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the timing, scope or likelihood of regulatory filings and approvals, including timing of Investigational New Drug Application and Biological Licensing Application filings for our current and future product candidates, and final U.S. Food and Drug Administration, European Medicines Agency or other foreign regulatory authority approval of our current and future product candidates;
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our ability to develop and advance our current product candidates and programs into, and successfully complete, clinical studies;
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our manufacturing, commercialization and marketing capabilities and strategy;
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the potential benefits of and our ability to maintain our collaboration with Gilead, and establish or maintain future collaborations or strategic relationships or obtain additional funding;
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the rate and degree of market acceptance and clinical utility of our current and future product candidates;
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our intellectual property position, including the scope of protection we are able to establish and maintain for intellectual property rights covering our non-replicating and replicating technologies and the product candidates based on these technologies, the validity of intellectual property rights held by third parties, and our ability not to infringe, misappropriate or otherwise violate any third-party intellectual property rights;
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our ability to successfully identify and enter into collaborations to advance the breadth of our programs, and the commercial success of any such collaboration;
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future agreements with third parties in connection with the commercialization of our product candidates and any other approved product;
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regulatory developments in the United States and foreign countries;
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the effects of the ongoing coronavirus pandemic on business and operations;
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competitive companies, technologies and our industry and the success of competing therapies that are or may become available;
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our ability to attract and retain key scientific or management personnel;
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our ability to obtain funding for our operations, including funding necessary to complete further development and commercialization of our product candidates;
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the accuracy of our estimates of our annual total addressable market, future revenue, expenses, capital requirements and needs for additional financing;
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our expectations about market trends; and
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our expectations regarding the period during which we qualify as an emerging growth company under the Jumpstart Our Business Startups Act, or the JOBS Act, enacted in April 2012, as amended.
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We have included important factors in the cautionary statements included in this prospectus and the documents we incorporate by reference herein, particularly in the “Risk Factors” sections of these documents, that we believe could cause actual results or events to differ materially from the forward-looking statements that we make. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments we may make. No forward-looking statement is a guarantee of future performance.
You should read this prospectus and the documents that we incorporate by reference in this prospectus completely and with the understanding that our actual future results may be materially different from what we expect. The forward-looking statements in this prospectus and the documents we incorporate by reference herein represent our views as of the date of this prospectus. We anticipate that subsequent events and developments will cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we have no current intention of doing so except to the extent required by applicable law. You should, therefore, not rely on these forward-looking statements as representing our views as of any date subsequent to the date of this prospectus.

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THE COMPANYHOOKIPA PHARMA INC.
This summary highlights selected information from this prospectus and does not contain all of the information that you need to consider in making your investment decision. You should carefully read the entire prospectus, the applicable prospectus supplement and any related free writing prospectus, including the risks of investing in our securities discussed under the heading “Risk Factors” contained in the applicable prospectus supplement and any related free writing prospectus, and under similar headings in the other documents that are incorporated by reference into this prospectus. You should also carefully read the information incorporated by reference into this prospectus, including our financial statements, and the exhibits to the registration statement of which this prospectus is a part.
Unless the context indicates otherwise, as used in this prospectus, the terms “HOOKIPA Pharma,” “HOOKIPA,” “the Company,” “we,” “us” and “our” refer to HOOKIPA Pharma Inc. and our consolidated subsidiaries. We use HOOKIPA and the HOOKIPA logo as trademarks in the United States and other countries. All other trademarks or trade names referred to in this prospectus are the property of their respective owners.
Overview
We are a clinical-stage biopharmaceutical company developing a new class of immunotherapeutics based on our proprietary arenavirus platform that is designed to target and amplify T cell immune responses to disease. We believe that our technologies can meaningfully leverage the human immune system for prophylactic and therapeutic purposes by inducing CD8+ T cell response levels previously not achieved by other immunotherapy approaches.
We are building a proprietary immuno-oncology pipeline by targeting oncoviral cancer antigens, self-antigens and next-generation antigens. Our oncology portfolio includes three disclosed programs, HB-200, HB-300, and HB-700, which all use our replicating technology. HB-200 is in clinical development for the treatment of Human Papillomavirus 16-positive cancers, or HPV16+, in an ongoing Phase 1/2 clinical trial. HB-300 is in development for the treatment of prostate cancer and expected to move into the clinic after our planned third quarter 2022 filing of an investigational new drug application filing. HB-700 is our newest asset in preclinical development for treatment of KRAS mutated cancers, including, lung, colorectal and pancreatic cancers.
Our HB-200 program is comprised of HB-201 single vector therapy and HB-201/HB-202 two vector therapy. Both therapies have been evaluated in Phase 1 portion of the study, and Phase 2 is ongoing, evaluating HB-202/HB-201 alone in the post standard of care setting and in combination with pembrolizumab in 1st line and 2nd plus line settings. In November 2021, we announced interim data from our Phase 1 portion of the study, showing promising anti-tumor activity against advanced/metastatic HPV16+ cancers and favorable tolerability. In June 2022, we announced Phase 1 results, showing superior immune response generated by alternating two-vector therapy. Data demonstrated responses and stable disease in head and neck cancer patients who failed prior standard of care therapy.
In September 2021, we entered into a clinical collaboration with Merck & Co., Inc. to evaluate the combination of HB-200 and Merck & Co., Inc’s anti-PD-1 therapy, KEYTRUDA® (pembrolizumab) in a separate randomized Phase 2 trial. In January 2022, we dosed the first patient with a combination of HB-201 and pembrolizumab for the treatment of first line advanced/metastatic HPV16+ HNSCC in the Phase 2 expansion portion of the ongoing Phase 1/2 trial.
Our non-replicating prophylactic Cytomegalovirus, or CMV, vaccine candidate, HB-101, is a potential first in-class compound in a Phase 2 clinical trial for patients awaiting kidney transplantation. In November 2021, we reported safety, immunogenicity and efficacy data, whereby the three-dose schedule of HB-101 pre-transplantation showed a trend of reducing incidence of CMV viremia and antiviral use. The trial will continue to follow patients currently on-study with final top-line data readout in the first half of 2023. We have decided to pursue HB-101 further only if we are able to partner the program with a collaborator, thereby enabling greater strategic focus on the immuno-oncology programs.
We entered into a collaboration and licensing agreement with Gilead Sciences, Inc., or Gilead, in June 2018 to research arenavirus functional cures for HIV and chronic Hepatitis B infections. In

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February 2022, we signed an amended and restated collaboration and licensing agreement which revised the terms only for the HIV program, whereby we will take on development responsibilities for the HIV program candidate through a Phase 1b clinical trial. Please see below for more information relating to this agreement with Gilead.
Stock Purchase Agreement
On February 15, 2022, the Effective Date, we entered into a Stock Purchase Agreement, the Stock Purchase Agreement, with Gilead. Pursuant to, and subject to the terms and conditions of, the Stock Purchase Agreement, Gilead is required, at our option, to purchase up to $35,000,000 of our common stock, the proceeds of which we intend to use to fund additional research and development activities of our HIV program. On the Effective Date, Gilead purchased an initial amount of 1,666,666 unregistered shares of our common stock in exchange for approximately $5.0 million at a purchase price per share equal to $3.00. Pursuant to the terms of the Stock Purchase Agreement, we may require Gilead to purchase the balance of the $30.0 million of common stock in two subsequent purchases. If we exercise our right to require

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Gilead to purchase such balance, the purchase price per share of the first subsequent purchase shall be equal to (a) the VWAP Purchase Price (as defined in the Stock Purchase Agreement), calculated at the date we exercise our right to require Gilead to purchase shares, plus (b) a premium of 30% on the VWAP Purchase Price, and the purchase price per share of the second subsequent purchase shall be equal to the VWAP Purchase Price, calculated at the date the Company exercises its right to require Gilead to purchase shares. Our ability to sell shares of our common stock to Gilead is subject to specified limitations, including compliance with Nasdaq Rule 5635(d) and continued compliance with the Nasdaq listing rules. The Stock Purchase Agreement also prohibits Gilead from purchasing shares of our common stock if such purchase would result in Gilead being a beneficial owner of more than 19.9% of the total number of our then-issued and outstanding shares of common stock.
The Stock Purchase Agreement may be terminated (1) by Gilead (a) any time an Event of Default (as defined in the Stock Purchase Agreement) exists or (b) if we suspend, terminate or otherwise cease to perform our obligations under the HIV Development Plan (as defined in the Stock Purchase Agreement); (2) automatically if Gilead exercises its Option pursuant to the Restated Collaboration Agreement (both as defined below); (3) by us for any reason; (4) automatically on the date that we sell and Gilead purchases the full $35.0 million of common stock; or (5) automatically on December 31, 2023.
Pursuant to the terms of the Stock Purchase Agreement, we and Gilead agreed to enter into a registration rights agreement within two months following the Effective Date, obligating us to file a registration statement on Form S-3 to register for resale the initial 1,666,666 shares of common stock issued to Gilead within six months of the issuance on the Effective Date and thereafter within four months of any additional purchases of common stock by Gilead.
Corporate Information
We were originally incorporated as Hookipa Biotech AG under the laws of Austria in 2011. In February 2017, we reorganized to become a corporation under the laws of the State of Delaware as Hookipa Biotech, Inc., which was a fully-owned subsidiary of Hookipa Biotech AG. In June 2018, Hookipa Biotech, Inc. changed its name to HOOKIPA Pharma Inc. and acquired all of the shares of Hookipa Biotech AG, now Hookipa Biotech GmbH.
Our principal executive offices are located at 350 Fifth Avenue, 72nd Floor, Suite 7240, New York, New York 10118 and our telephone number is +43 1 890 63 60. Our website address is www.hookipapharma.com. The reference to our website is an inactive textual reference only and informationInformation contained in,on, or that can be assessedaccessed through, our website is not incorporated by reference into this prospectus and, therefore, is not part of this prospectus or any accompanying prospectus supplement.
Implications of Being an Emerging Growth Company and a Smaller Reporting Company
We are an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act, or the JOBS Act.Act, enacted in April 2012. For so long as we remain an emerging growth company, we are permitted and intend to rely on certain exemptions from various public company reporting requirements, including not being required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm pursuant to Section 404(b) of the Sarbanes-Oxley Act of 2002, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a non-bindingnonbinding advisory vote on executive compensation and any golden parachute payments not previously approved. In particular, in this prospectus, we have not included or incorporated by reference all of the executive compensation-related information that would be required if we were not an emerging growth company. Accordingly, the information contained herein may be different than the information you receive from other public companies in which you hold stock.
We will remain an emerging growth company until the earlier to occur of (1) the last day of the fiscal year (a) following April 18, 2024, (b) in which we have total annual gross revenues of at least $1.07 billion or (c) in which we are deemed to be a “large accelerated filer”filer,” under the rules of the SEC, which means the market value of our equity securities that is held by non-affiliates exceeds $700 million as of the prior June 30th, and (2) the date on which we have issued more than $1.0 billion in non-convertible debt during the prior three-year period.
In addition, the JOBS Act provides that an emerging growth company can take advantage of an extended transition period for complying with new or revised accounting standards. This provision allows an emerging growth company to delay the adoption of some accounting standards until those standards would otherwise apply to private companies. We have irrevocably elected not to avail ourselves of delayed adoption of new or revised accounting standards and, therefore, we will be subject to the same requirements to adopt new or revised accounting standards as other public companies that are not emerging growth companies.
We are also a “smaller reporting company” meaning that the market value of our stock held by non-affiliates is less than $700 million and our annual revenue was less than $100 million during our most recently completed fiscal year. We may continue to be a smaller reporting company if either (i) the market value of our stock held by non-affiliates is less than $250 million or (ii) our annual revenue was less than $100 million during the most recently completed fiscal year and the market value of our stock held by non-affiliates is less than $700 million. If we are a smaller reporting company at the time we cease to be an emerging growth company, we may continue to rely on exemptions from certain disclosure requirements that are available to smaller reporting companies. For so long as we remain a smaller reporting company, we are permitted and intend to rely on exemptions from certain disclosure and other requirements that are applicable to other public companies that are not smaller reporting companies.

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RISK FACTORS
Investing in our securities involves a high degree of risk. You should carefully review the risks and uncertainties described under the heading “Risk Factors” contained in the applicable prospectus supplement and any related free writing prospectus, and under similar headings in our Annual Report on Form 10-K for the year ended December 31, 2021, as updated by our annual, quarterly and other reports and documents that are incorporated by reference into this prospectus, before deciding whether to purchase any of the securities being registered pursuant to the registration statement of which this prospectus is a part. Each of the risk factors could adversely affect our business, operating results and financial condition, as well as adversely affect the value of an investment in our securities, and the occurrence of any of these risks might cause you to lose all or part of your investment. Additional risks not presently known to us or that we currently believe are immaterial may also significantly impair our business operations.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This prospectus, including the documents that we incorporate by reference, contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Any statements about our expectations, beliefs, plans, objectives, assumptions or future events or performance are not historical facts and may be forward-looking. These statements are often, but are not always, made through the use of words or phrases such as “may,” “will,” “could,” “should,” “expects,” “intends,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “projects,” “potential,” “continue,” and similar expressions, or the negative of these terms, or similar expressions. Accordingly, these statements involve estimates, assumptions, risks and uncertainties which could cause actual results to differ materially from those expressed in them. Any forward-looking statements are qualified in their entirety by reference to the factors discussed throughout this prospectus, and in particular those factors referenced in the section “Risk Factors.”
This prospectus, including the documents that we incorporate by reference, contain forward-looking statements that are based on our management’s belief and assumptions and on information currently available to our management. These statements relate to future events or our future financial performance, and involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. Forward-looking statements include, but are not limited to, statements about:
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the success, cost and timing of our product development activities and clinical trials;
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the timing, scope or likelihood of regulatory filings and approvals, including timing of Investigational New Drug Application and Biological Licensing Application filings for our current and future product candidates, and final FDA, European Medicines Agency or other foreign regulatory authority approval of our current and future product candidates;
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our ability to develop and advance our current product candidates and programs into, and successfully complete, clinical studies;
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our manufacturing, commercialization and marketing capabilities and strategy;
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the potential benefits of and our ability to maintain our collaboration with Gilead, and establish or maintain future collaborations or strategic relationships or obtain additional funding;
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the rate and degree of market acceptance and clinical utility of our current and future product candidates;
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our intellectual property position, including the scope of protection we are able to establish and maintain for intellectual property rights covering our non-replicating and replicating technologies and the product candidates based on these technologies, the validity of intellectual property rights held by third parties, and our ability not to infringe, misappropriate or otherwise violate any third-party intellectual property rights;
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our ability to successfully identify and enter into collaborations to advance the breadth of our programs, and the commercial success of any such collaboration;
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future agreements with third parties in connection with the commercialization of our product candidates and any other approved product;
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regulatory developments in the United States and foreign countries;
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the effects of the ongoing coronavirus pandemic on business and operations;
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competitive companies, technologies and our industry and the success of competing therapies that are or may become available;
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our ability to attract and retain key scientific or management personnel;
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our ability to obtain funding for our operations, including funding necessary to complete further development and commercialization of our product candidates;
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the accuracy of our estimates of our annual total addressable market, future revenue, expenses, capital requirements and needs for additional financing;
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our expectations about market trends; and
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our expectations regarding the period during which we qualify as an emerging growth company under the Jumpstart Our Business Startups Act of 2012, as amended.
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This prospectus and the documents incorporated by reference also contain estimates, projections and other information concerning our industry, our business, and the markets for certain diseases, including data regarding the estimated size of those markets, and the incidence and prevalence of certain medical conditions. Information that is based on estimates, forecasts, projections, market research or similar methodologies is inherently subject to uncertainties and actual events or circumstances may differ materially from events and circumstances reflected in this information. Unless otherwise expressly stated, we obtained this industry, business, market and other data from reports, research surveys, studies and similar data prepared by market research firms and other third parties, industry, medical and general publications, government data and similar sources.
You should read this prospectus and the documents that we incorporate by reference in this prospectus completely and with the understanding that our actual future results may be materially different from what we expect. The forward-looking statements in this prospectus and the documents we incorporate by reference herein represent our views as of their respective dates. We anticipate that subsequent events and developments will cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we have no current intention of doing so except to the extent required by applicable law. You should, therefore, not rely on these forward-looking statements as representing our views as of any date subsequent to the date of this prospectus.

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USE OF PROCEEDS
We intend to use the net proceeds from the sale of any securities offered under this prospectus for general corporate purposes unless otherwise indicated in the applicable prospectus supplement. General corporate purposes may include, but are not limited to, research and development costs, including the conduct of one or more clinical trials and process development and manufacturing of our product candidates, potential strategic acquisitions of complementary businesses, services or technologies, expansion of our technology infrastructure and capabilities, working capital, capital expenditures and other general corporate purposes. We may temporarily invest the net proceeds in a variety of capital preservation instruments, including investment grade, interest bearing instruments and U.S. government securities, until they are used for their stated purpose. We have not determined the amount of net proceeds to be used specifically for such purposes. As a result, management will retain broad discretion over the allocation of net proceeds.

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DESCRIPTION OF CAPITAL STOCK
The following descriptions are summaries of the material terms of our amended and restated certificate of incorporation and amended and restated bylaws. We refer in this section to our amended and restated certificate of incorporation as our certificate of incorporation, and we refer to our amended and restated bylaws as our bylaws.
General
Our authorized capital stock consists of two hundred million (200,000,000) shares of common stock, three million nine hundred thousand (3,900,000) shares of Class A common stock, par value $0.0001 per share and ten million (10,000,000) shares of undesignated preferred stock, par value $0.0001 per share.
Common Stock
We have two classes of common stock: common stock and Class A common stock. The common stock is voting common stock and the Class A common stock is non-voting common stock. The holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of the stockholders. The holders of our common stock do not have any cumulative voting rights. Holders of both classes of our common stock are entitled to receive ratably any dividends declared by our board of directors out of funds legally available for that purpose, subject to any preferential dividend rights of any outstanding preferred stock or that we may designate or issue in the future.
In the event of our liquidation, dissolution, or winding up, holders of our common stock will be entitled to share ratably in all assets remaining after payment of all debts and other liabilities and any liquidation preference of any outstanding preferred stock. The shares to be issued by us in this offering will be, when issued and paid for, validly issued, fully paid and non-assessable.
Voting Common Stock
As of March 31, 2022, 50,872,734 shares of our common stock were outstanding and held by 5 stockholders of record. In addition, as of March 31, 2022, we had outstanding options to purchase 4,298,946 shares of our common stock under our 2018 Stock Option and Grant Plan and our 2019 Stock Option and Incentive Plan, at a weighted average exercise price of $8.96 per share, 2,682,044 of which were exercisable. All common stock is fully paid and non-assessable. Our common stock has no preemptive rights, conversion rights, or other subscription rights or redemption or sinking fund provisions.
Non-Voting Class A Common Stock
As of March 31, 2022, 3,819,732 shares of our Class A common stock were outstanding and held by two stockholders of record. Each holder of Class A common stock may elect to convert any portion of its Class A common stock into voting common stock at any time, unless, as a result of such conversion, the holder and its affiliates would own more than 4.99% of the combined voting power of our outstanding share capital. A holder of Class A common stock may increase, decrease or waive this limitation on ownership by providing us with 61-days’ notice. Our Class A common stock has no preemptive rights or other subscription rights or redemption or sinking fund provisions.
Preferred Stock
Our board of directors has the authority, without further action by our stockholders, to issue up to ten million (10,000,000) shares of preferred stock in one or more series and to fix the rights, preferences, privileges and restrictions thereof. These rights, preferences and privileges could include dividend rights, conversion rights, voting rights, terms of redemption, liquidation preferences, sinking fund terms and the number of shares constituting, or the designation of, such series, any or all of which may be greater than the rights of common stock. The issuance of our preferred stock could adversely affect the voting power of holders of common stock and the likelihood that such holders will receive dividend payments and payments upon our liquidation. In addition, the issuance of preferred stock could have the effect of delaying, deferring or preventing a change in control of our company or other corporate action.

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We have designated 2,978 of the 10,000,000 authorized shares of preferred stock as non-voting Series A convertible preferred stock and 15,800 of the 10,000,000 authorized shares of preferred stock as non-voting Series A-1 convertible preferred stock. As of March 31, 2022, we had 1,697 shares of Series A convertible preferred stock and 15,800 shares of Series A-1 convertible preferred stock outstanding and issued.
Registration Rights
Pursuant to the terms of our shareholders’ agreement, dated as of February 15, 2019, certain of our stockholders are entitled to rights with respect to the registration of their shares under the Securities Act.
Demand Registration Rights.   Pursuant to the terms of our shareholders’ agreement, certain holders of shares of our common stock are entitled to demand registration rights.
Short-Form Registration Rights.   Pursuant to the terms of our shareholders’ agreement, certain holders of shares of our common stock are entitled to short-form registration rights. If we are eligible to file a registration statement on Form S-3, upon the written request of a majority of our stockholders to sell securities at an anticipated aggregate price of at least $10.0 million, we will be required to use commercially reasonable efforts to effect a registration of such shares.
Piggyback Registration Rights.   Pursuant to the terms of our shareholders’ agreement, certain holders of shares of our common stock are entitled to piggyback registration rights. If we register any of our securities either for our own account or for the account of other security holders, the holders of these shares are entitled to include their shares in the registration.
Expiration of Registration Rights.   The demand registration rights and short form registration rights will terminate as to a given stockholder at such time as Rule 144 or another similar exemption under the Securities Act is available for the sale of all of such stockholder’s shares without limitation during a three-month period without registration.
Anti-Takeover Effects of our Certificate of Incorporation and Bylaws and Delaware Law
Our certificate of incorporation and bylaws include a number of provisions that may have the effect of delaying, deferring or preventing another party from acquiring control of us and encouraging persons considering unsolicited tender offers or other unilateral takeover proposals to negotiate with our board of directors rather than pursue non-negotiated takeover attempts. These provisions include the items described below.
Board Composition and Filling Vacancies
Our certificate of incorporation provides for the division of our board of directors into three classes serving staggered three-year terms, with one class being elected each year. Our certificate of incorporation also provides that directors may be removed only for cause and then only by the affirmative vote of the holders of two thirds (2/3) or more of the shares then entitled to vote at an election of directors. Further, any vacancy on our board of directors, however occurring, including a vacancy resulting from an increase in the size of our board, may only be filled by the affirmative vote of a majority of our directors then in office even if less than a quorum. The classification of directors, together with the limitations on removal of directors and treatment of vacancies, has the effect of making it more difficult for stockholders to change the composition of our board of directors.
No Written Consent of Stockholders
Our certificate of incorporation provides that all stockholder actions are required to be taken by a vote of the stockholders at an annual or special meeting, and that stockholders may not take any action by written consent in lieu of a meeting. This limit may lengthen the amount of time required to take stockholder actions and would prevent the amendment of our bylaws or removal of directors by our stockholders without holding a meeting of stockholders.
Meetings of Stockholders
Our certificate of incorporation and bylaws provide that only a majority of the members of our board of directors then in office may call special meetings of stockholders and only those matters set forth in the

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notice of the special meeting may be considered or acted upon at a special meeting of stockholders. Our bylaws limit the business that may be conducted at an annual meeting of stockholders to those matters properly brought before the meeting.
Advance Notice Requirements
Our bylaws establish advance notice procedures with regard to stockholder proposals relating to the nomination of candidates for election as directors or new business to be brought before meetings of our stockholders. These procedures provide that notice of stockholder proposals must be timely given in writing to our corporate secretary prior to the meeting at which the action is to be taken. Generally, to be timely, notice must be received at our principal executive offices not less than 90 days nor more than 120 days prior to the first anniversary date of the annual meeting for the preceding year. Our bylaws specify the requirements as to form and content of all stockholders’ notices. These requirements may preclude stockholders from bringing matters before the stockholders at an annual or special meeting.
Amendment to Certificate of Incorporation and Bylaws
Any amendment of our certificate of incorporation must first be approved by a majority of our board of directors, and if required by law or our certificate of incorporation, must thereafter be approved by a majority of the outstanding shares entitled to vote on the amendment and a majority of the outstanding shares of each class entitled to vote thereon as a class, except that the amendment of the provisions relating to stockholder action, board composition, limitation of liability and the amendment of our bylaws and certificate of incorporation must be approved by not less than two thirds (2/3) of the outstanding shares entitled to vote on the amendment, and not less than two thirds (2/3) of the outstanding shares of each class entitled to vote thereon as a class. Our bylaws may be amended by the affirmative vote of a majority of the directors then in office, subject to any limitations set forth in the bylaws; and may also be amended by the affirmative vote of at least two thirds (2/3) of the outstanding shares entitled to vote on the amendment, or, if our board of directors recommends that the stockholders approve the amendment, by the affirmative vote of the majority of the outstanding shares entitled to vote on the amendment, in each case voting together as a single class.
Undesignated Preferred Stock
Our certificate of incorporation provides for 10,000,000 authorized shares of preferred stock. The existence of authorized but unissued shares of preferred stock may enable our board of directors to discourage an attempt to obtain control of us by means of a merger, tender offer, proxy contest or otherwise. For example, if in the due exercise of its fiduciary obligations, our board of directors were to determine that a takeover proposal is not in the best interests of our stockholders, our board of directors could cause shares of preferred stock to be issued without stockholder approval in one or more private offerings or other transactions that might dilute the voting or other rights of the proposed acquirer or insurgent stockholder or stockholder group. In this regard, our certificate of incorporation grants our board of directors broad power to establish the rights and preferences of authorized and unissued shares of preferred stock. The issuance of shares of preferred stock could decrease the amount of earnings and assets available for distribution to holders of shares of common stock. The issuance may also adversely affect the rights and powers, including voting rights, of these holders and may have the effect of delaying, deterring, or preventing a change in control of us.
Exclusive Jurisdiction for Certain Actions
Our bylaws provide that, unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware shall be the sole and exclusive forum for state law claims for (1) any derivative action or proceeding brought on behalf of the Company, (2) any action asserting a claim of breach of a fiduciary duty owed by any of our current or former directors, officers, or other employees to the Company or our stockholders, (3) any action asserting a claim arising against the Company or any of our current or former directors, officers, or other employees pursuant to any provision of the Delaware General Corporation Law or our certificate of incorporation or our bylaws, (4) any action to interpret, apply, enforce or determine the validity of our certificate of Incorporation or bylaws, or (5) any action asserting a claim against the Company or any of our current or former directors, officers, or other employees that is governed by the internal affairs doctrine. In addition, our bylaws provide that any person or entity

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purchasing or otherwise acquiring any interest in shares of our common stock is deemed to have notice of and consented to the foregoing provisions. This choice of forum provision does not apply to claims or causes of action brought to enforce a duty or liability created by the Securities Act, the Exchange Act or any other claim for which the federal courts have exclusive jurisdiction.
Section 203 of the Delaware General Corporation Law
We are subject to the provisions of Section 203 of the Delaware General Corporation Law. In general, Section 203 prohibits a publicly held Delaware corporation from engaging in a “business combination” with an “interested stockholder” for a three-year period following the time that this stockholder becomes an interested stockholder, unless the business combination is approved in a prescribed manner. Under Section 203, a business combination between a corporation and an interested stockholder is prohibited unless it satisfies one of the following conditions:
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before the stockholder became interested, our board of directors approved either the business combination or the transaction which resulted in the stockholder becoming an interested stockholder;
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upon consummation of the transaction which resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding, shares owned by persons who are directors and also officers, and employee stock plans, in some instances, but not the outstanding voting stock owned by the interested stockholder; or
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at or after the time the stockholder became interested, the business combination was approved by our board of directors and authorized at an annual or special meeting of the stockholders by the affirmative vote of at least two-thirds of the outstanding voting stock which is not owned by the interested stockholder.
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Section 203 defines a business combination to include:
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any merger or consolidation involving the corporation and the interested stockholder;
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any sale, transfer, lease, pledge or other disposition involving the interested stockholder of 10% or more of the assets of the corporation;
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subject to exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested stockholder;
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subject to exceptions, any transaction involving the corporation that has the effect of increasing the proportionate share of the stock of any class or series of the corporation beneficially owned by the interested stockholder; and
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the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges or other financial benefits provided by or through the corporation.
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In general, Section 203 defines an interested stockholder as any entity or person beneficially owning 15% or more of the outstanding voting stock of the corporation and any entity or person affiliated with or controlling or controlled by the entity or person.
Exchange Listing
Our common stock is listed on the Nasdaq Global Select Market under the trading symbol “HOOK.”
Transfer Agent and Registrar
The transfer agent and registrar for our common stock is American Stock Transfer & Trust Company, LLC. The transfer agent and registrar’s address is 6201 15th Ave, Brooklyn, New York 11219.

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DESCRIPTION OF DEBT SECURITIES
This section describes the general terms and provisions of our debt securities that we may issue from time to time. We may issue debt securities, in one or more series, as either senior or subordinated debt or as senior or subordinated convertible debt. While the terms we have summarized below will apply generally to any future debt securities we may offer under this prospectus, the applicable prospectus supplement or free writing prospectus will describe the specific terms of any debt securities offered through that prospectus supplement or free writing prospectus. The terms of any debt securities we offer under a prospectus supplement or free writing prospectus may differ from the terms we describe below. Unless the context requires otherwise, whenever we refer to the “indentures,” we are also referring to any supplemental indentures that specify the terms of a particular series of debt securities.
We will issue any senior debt securities under the senior indenture that we will enter into with the trustee named in the senior indenture. We will issue any subordinated debt securities under the subordinated indenture that we will enter into with the trustee named in the subordinated indenture. We have filed forms of these documents as exhibits to the registration statement, of which this prospectus is a part, and supplemental indentures and forms of debt securities containing the terms of the debt securities being offered will be filed as exhibits to the registration statement of which this prospectus is a part or will be incorporated by reference from reports that we file with the SEC.
The indentures will be qualified under the Trust Indenture Act of 1939, as amended, or the Trust Indenture Act. We use the term “trustee” to refer to either the trustee under the senior indenture or the trustee under the subordinated indenture, as applicable.
The following summaries of material provisions of the senior debt securities, the subordinated debt securities and the indentures are subject to, and qualified in their entirety by reference to, all of the provisions of the indenture applicable to a particular series of debt securities. We urge you to read the applicable prospectus supplement or free writing prospectus and any related free writing prospectuses related to the debt securities that we may offer under this prospectus, as well as the complete applicable indenture that contains the terms of the debt securities. Except as we may otherwise indicate, the terms of the senior indenture and the subordinated indenture are identical.
General
We will describe in the applicable prospectus supplement or free writing prospectus the terms of the series of debt securities being offered, including:
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the title;
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the principal amount being offered, and if a series, the total amount authorized and the total amount outstanding;
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any limit on the amount that may be issued;
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whether or not we will issue the series of debt securities in global form, and, if so, the terms and who the depository will be;
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the maturity date;
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whether and under what circumstances, if any, we will pay additional amounts on any debt securities held by a person who is not a United States person for tax purposes, and whether we can redeem the debt securities if we have to pay such additional amounts;
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the annual interest rate, which may be fixed or variable, or the method for determining the rate and the date interest will begin to accrue, the dates interest will be payable and the regular record dates for interest payment dates or the method for determining such dates;
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whether or not the debt securities will be secured or unsecured, and the terms of any secured debt;
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the terms of the subordination of any series of subordinated debt;
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the place where payments will be payable;
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restrictions on transfer, sale or other assignment, if any;
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our right, if any, to defer payment of interest and the maximum length of any such deferral period;
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the date, if any, after which, the conditions upon which, and the price at which, we may, at our option, redeem the series of debt securities pursuant to any optional or provisional redemption provisions and the terms of those redemption provisions;
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the date, if any, on which, and the price at which we are obligated, pursuant to any mandatory sinking fund or analogous fund provisions or otherwise, to redeem, or at the holder’s option, to purchase, the series of debt securities and the currency or currency unit in which the debt securities are payable;
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whether the indenture will restrict our ability or the ability of our subsidiaries, if any at such time, to:
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incur additional indebtedness;
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issue additional securities;
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create liens;
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pay dividends or make distributions in respect of our capital stock or the capital stock of our subsidiaries;
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redeem capital stock;
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place restrictions on our subsidiaries’ ability to pay dividends, make distributions or transfer assets;
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make investments or other restricted payments;
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sell or otherwise dispose of assets;
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enter into sale-leaseback transactions;
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engage in transactions with stockholders or affiliates;
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issue or sell stock of our subsidiaries; or
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effect a consolidation or merger;
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whether the indenture will require us to maintain any interest coverage, fixed charge, cash flow-based, asset-based or other financial ratios;
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a discussion of certain material or special United States federal income tax considerations applicable to the debt securities;
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information describing any book-entry features;
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provisions for a sinking fund purchase or other analogous fund, if any;
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the applicability of the provisions in the indenture on discharge;
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whether the debt securities are to be offered at a price such that they will be deemed to be offered at an “original issue discount” as defined in paragraph (a) of Section 1273 of the Internal Revenue Code of 1986, as amended;
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the denominations in which we will issue the series of debt securities, if other than denominations of $1,000 and any integral multiple thereof;
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the currency of payment of debt securities if other than U.S. dollars and the manner of determining the equivalent amount in U.S. dollars; and
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any other specific terms, preferences, rights or limitations of, or restrictions on, the debt securities, including any additional events of default or covenants provided with respect to the debt securities, and any terms that may be required by us or advisable under applicable laws or regulations or advisable in connection with the marketing of the debt securities.
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Conversion or Exchange Rights
We will set forth in the applicable prospectus supplement or free writing prospectus the terms on which a series of debt securities may be convertible into or exchangeable for our common stock, our preferred stock or other securities (including securities of a third-party). We will include provisions as to whether conversion or exchange is mandatory, at the option of the holder or at our option. We may include provisions pursuant to which the number of shares of our common stock, our preferred stock or other securities (including securities of a third-party) that the holders of the series of debt securities receive would be subject to adjustment.
Consolidation, Merger or Sale
Unless we provide otherwise in the prospectus supplement or free writing prospectus applicable to a particular series of debt securities, the indentures will not contain any covenant that restricts our ability to merge or consolidate, or sell, convey, transfer or otherwise dispose of all or substantially all of our assets. However, any successor to or acquirer of such assets must assume all of our obligations under the indentures or the debt securities, as appropriate. If the debt securities are convertible into or exchangeable for other securities of ours or securities of other entities, the person with whom we consolidate or merge or to whom we sell all of our property must make provisions for the conversion of the debt securities into securities that the holders of the debt securities would have received if they had converted the debt securities before the consolidation, merger or sale.
Events of Default Under the Indenture
Unless we provide otherwise in the prospectus supplement or free writing prospectus applicable to a particular series of debt securities, the following are events of default under the indentures with respect to any series of debt securities that we may issue:
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if we fail to pay interest when due and payable and our failure continues for 90 days and the time for payment has not been extended;
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if we fail to pay the principal, premium or sinking fund payment, if any, when due and payable at maturity, upon redemption or repurchase or otherwise, and the time for payment has not been extended;
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if we fail to observe or perform any other covenant contained in the debt securities or the indentures, other than a covenant specifically relating to another series of debt securities, and our failure continues for 90 days after we receive notice from the trustee or holders of at least 25% in aggregate principal amount of the outstanding debt securities of the applicable series; and
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if specified events of bankruptcy, insolvency or reorganization occur.
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We will describe in each applicable prospectus supplement or free writing prospectus any additional events of default relating to the relevant series of debt securities.
If an event of default with respect to debt securities of any series occurs and is continuing, other than an event of default specified in the last bullet point above, the trustee or the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series, by notice to us in writing, and to the trustee if notice is given by such holders, may declare the unpaid principal, premium, if any, and accrued interest, if any, due and payable immediately. If an event of default specified in the last bullet point above occurs with respect to us, the unpaid principal, premium, if any, and accrued interest, if any, of each issue of debt securities then outstanding shall be due and payable without any notice or other action on the part of the trustee or any holder.
The holders of a majority in principal amount of the outstanding debt securities of an affected series may waive any default or event of default with respect to the series and its consequences, except defaults or events of default regarding payment of principal, premium, if any, or interest, unless we have cured the default or event of default in accordance with the indenture. Any waiver shall cure the default or event of default.

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Subject to the terms of the indentures, if an event of default under an indenture shall occur and be continuing, the trustee will be under no obligation to exercise any of its rights or powers under such indenture at the request or direction of any of the holders of the applicable series of debt securities, unless such holders have offered the trustee reasonable indemnity or security satisfactory to it against any loss, liability or expense. The holders of a majority in principal amount of the outstanding debt securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any trust or power conferred on the trustee, with respect to the debt securities of that series, provided that:
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the direction so given by the holder is not in conflict with any law or the applicable indenture; and
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subject to its duties under the Trust Indenture Act, the trustee need not take any action that might involve it in personal liability or might be unduly prejudicial to the holders not involved in the proceeding.
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A holder of the debt securities of any series will have the right to institute a proceeding under the indentures or to appoint a receiver or trustee, or to seek other remedies if:
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the holder has given written notice to the trustee of a continuing event of default with respect to that series;
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the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series have made written request, and such holders have offered reasonable indemnity to the trustee or security satisfactory to it against any loss, liability or expense or to be incurred in compliance with instituting the proceeding as trustee; and
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the trustee does not institute the proceeding, and does not receive from the holders of a majority in aggregate principal amount of the outstanding debt securities of that series other conflicting directions within 90 days after the notice, request and offer.
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These limitations do not apply to a suit instituted by a holder of debt securities if we default in the payment of the principal, premium, if any, or interest on, the debt securities, or other defaults that may be specified in the applicable prospectus supplement or free writing prospectus.
We will periodically file statements with the trustee regarding our compliance with specified covenants in the indentures.
Modification of Indenture; Waiver
Subject to the terms of the indenture for any series of debt securities that we may issue, we and the trustee may change an indenture without the consent of any holders with respect to the following specific matters:
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to fix any ambiguity, defect or inconsistency in the indenture;
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to comply with the provisions described above under “— Consolidation, Merger or Sale;”
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to comply with any requirements of the SEC in connection with the qualification of any indenture under the Trust Indenture Act;
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to add to, delete from or revise the conditions, limitations, and restrictions on the authorized amount, terms, or purposes of issue, authentication and delivery of debt securities, as set forth in the indenture;
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to provide for the issuance of and establish the form and terms and conditions of the debt securities of any series as provided under “Description of Our Debt Securities — General,” to establish the form of any certifications required to be furnished pursuant to the terms of the indenture or any series of debt securities, or to add to the rights of the holders of any series of debt securities;
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•
to evidence and provide for the acceptance of appointment hereunder by a successor trustee;
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•
to provide for uncertificated debt securities and to make all appropriate changes for such purpose;
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•
to add to our covenants such new covenants, restrictions, conditions or provisions for the benefit of the holders, to make the occurrence, or the occurrence and the continuance, of a default in any such additional covenants, restrictions, conditions or provisions an event of default or to surrender any right or power conferred to us in the indenture; or
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•
to change anything that does not materially adversely affect the interests of any holder of debt securities of any series.
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In addition, under the indentures, the rights of holders of a series of debt securities may be changed by us and the trustee with the written consent of the holders of at least a majority in aggregate principal amount of the outstanding debt securities of each series that is affected. However, subject to the terms of the indenture for any series of debt securities that we may issue or as otherwise provided in the prospectus supplement or free writing prospectus applicable to a particular series of debt securities, we and the trustee may make the following changes only with the consent of each holder of any outstanding debt securities affected:
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extending the stated maturity of the series of debt securities;
​
•
reducing the principal amount, reducing the rate of or extending the time of payment of interest, or reducing any premium payable upon the redemption or repurchase of any debt securities; or
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•
reducing the percentage of debt securities, the holders of which are required to consent to any amendment, supplement, modification or waiver.
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Discharge
Each indenture provides that, subject to the terms of the indenture and any limitation otherwise provided in the prospectus supplement or free writing prospectus applicable to a particular series of debt securities, we can elect to be discharged from our obligations with respect to one or more series of debt securities, except for specified obligations, including obligations to:
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register the transfer or exchange of debt securities of the series;
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replace stolen, lost or mutilated debt securities of the series;
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maintain paying agencies;
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hold monies for payment in trust;
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recover excess money held by the trustee;
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compensate and indemnify the trustee; and
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appoint any successor trustee.
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In order to exercise our rights to be discharged, we must deposit with the trustee money or government obligations sufficient to pay all the principal of, any premium and interest on, the debt securities of the series on the dates payments are due.
Form, Exchange and Transfer
We will issue the debt securities of each series only in fully registered form without coupons and, unless we otherwise specify in the applicable prospectus supplement or free writing prospectus, in denominations of $1,000 and any integral multiple thereof. The indentures provide that we may issue debt securities of a series in temporary or permanent global form and as book-entry securities that will be deposited with, or on behalf of, The Depository Trust Company or another depository named by us and identified in a prospectus supplement or free writing prospectus with respect to that series.
At the option of the holder, subject to the terms of the indentures and the limitations applicable to global securities described in the applicable prospectus supplement or free writing prospectus, the holder of the debt securities of any series can exchange the debt securities for other debt securities of the same series, in any authorized denomination and of like tenor and aggregate principal amount.

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Subject to the terms of the indentures and the limitations applicable to global securities set forth in the applicable prospectus supplement or free writing prospectus, holders of the debt securities may present the debt securities for exchange or for registration of transfer, duly endorsed or with the form of transfer endorsed thereon duly executed if so required by us or the security registrar, at the office of the security registrar or at the office of any transfer agent designated by us for this purpose. Unless otherwise provided in the debt securities that the holder presents for transfer or exchange, we will make no service charge for any registration of transfer or exchange, but we may require payment of any taxes or other governmental charges.
We will name in the applicable prospectus supplement or free writing prospectus the security registrar, and any transfer agent in addition to the security registrar, that we initially designate for any debt securities. We may at any time designate additional transfer agents or rescind the designation of any transfer agent or approve a change in the office through which any transfer agent acts, except that we will be required to maintain a transfer agent in each place of payment for the debt securities of each series. If we elect to redeem the debt securities of any series, we will not be required to:
•
issue, register the transfer of, or exchange any debt securities of that series during a period beginning at the opening of business 15 days before the day of mailing of a notice of redemption of any debt securities that may be selected for redemption and ending at the close of business on the day of the mailing; or
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•
register the transfer of or exchange any debt securities so selected for redemption, in whole or in part, except the unredeemed portion of any debt securities we are redeeming in part.
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Information Concerning the Trustee
The trustee, other than during the occurrence and continuance of an event of default under an indenture, undertakes to perform only those duties as are specifically set forth in the applicable indenture. Upon an event of default under an indenture, the trustee must use the same degree of care as a prudent person would exercise or use in the conduct of his or her own affairs.
Subject to this provision, the trustee is under no obligation to exercise any of the powers given it by the indentures at the request of any holder of debt securities unless it is offered reasonable security and indemnity against the costs, expenses and liabilities that it might incur.
Payment and Paying Agents
Unless we otherwise indicate in the applicable prospectus supplement or free writing prospectus, we will make payment of the interest on any debt securities on any interest payment date to the person in whose name the debt securities, or one or more predecessor securities, are registered at the close of business on the regular record date for the interest.
We will pay principal of and any premium and interest on the debt securities of a particular series at the office of the paying agents designated by us, except that unless we otherwise indicate in the applicable prospectus supplement or free writing prospectus, we will make interest payments by check that we will mail to the holder or by wire transfer to certain holders. Unless we otherwise indicate in the applicable prospectus supplement or free writing prospectus, we will designate the corporate trust office of the trustee as our sole paying agent for payments with respect to debt securities of each series. We will name in the applicable prospectus supplement or free writing prospectus any other paying agents that we initially designate for the debt securities of a particular series. We will maintain a paying agent in each place of payment for the debt securities of a particular series.
All money we pay to a paying agent or the trustee for the payment of the principal of or any premium or interest on any debt securities that remains unclaimed at the end of two years after such principal, premium or interest has become due and payable will be repaid to us, and the holder of the debt security thereafter may look only to us for payment thereof.
Governing Law
The indentures and the debt securities will be governed by and construed in accordance with the laws of the State of New York, except to the extent that the Trust Indenture Act is applicable.

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Ranking of Debt Securities
The subordinated debt securities will be subordinate and junior in priority of payment to certain of our other indebtedness to the extent described in a prospectus supplement or free writing prospectus. The subordinated indenture does not limit the amount of subordinated debt securities that we may issue. It also does not limit us from issuing any other secured or unsecured debt.
The senior debt securities will rank equally in right of payment to all our other senior unsecured debt. The senior indenture does not limit the amount of senior debt securities that we may issue. It also does not limit us from issuing any other secured or unsecured debt.

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DESCRIPTION OF WARRANTS
The following description, together with the additional information we may include in any applicable prospectus supplements, summarizes the material terms and provisions of the warrants that we may offer under this prospectus and the related warrant agreements and warrant certificates. While the terms summarized below will apply generally to any warrants that we may offer, we will describe the particular terms of any series of warrants in more detail in the applicable prospectus supplement. If we indicate in the prospectus supplement, the terms of any warrants offered under that prospectus supplement may differ from the terms described below. Specific warrant agreements will contain additional important terms and provisions and will be incorporated by reference as an exhibit to the registration statement, which includes this prospectus.
General
We may issue warrants for the purchase of common stock, preferred stock and/or debt securities in one or more series. We may issue warrants independently or together with common stock, preferred stock and/or debt securities, and the warrants may be attached to or separate from these securities.
We will evidence each series of warrants by warrant certificates that we will issue under a separate warrant agreement. We will enter into the warrant agreement with a warrant agent. We will indicate the name and address of the warrant agent in the applicable prospectus supplement relating to a particular series of warrants.
We will describe in the applicable prospectus supplement the terms of the series of warrants, including:
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the offering price and aggregate number of warrants offered;
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the currency for which the warrants may be purchased;
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if applicable, the designation and terms of the securities with which the warrants are issued and the number of warrants issued with each such security or each principal amount of such security;
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if applicable, the date on and after which the warrants and the related securities will be separately transferable;
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in the case of warrants to purchase debt securities, the principal amount of debt securities purchasable upon exercise of one warrant and the price at, and currency in which, this principal amount of debt securities may be purchased upon such exercise;
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in the case of warrants to purchase common stock or preferred stock, the number of shares of common stock or preferred stock, as the case may be, purchasable upon the exercise of one warrant and the price at which these shares may be purchased upon such exercise;
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the effect of any merger, consolidation, sale or other disposition of our business on the warrant agreement and the warrants;
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the terms of any rights to redeem or call the warrants;
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any provisions for changes to or adjustments in the exercise price or number of securities issuable upon exercise of the warrants;
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•
the periods during which, and places at which, the warrants are exercisable;
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the manner of exercise;
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the dates on which the right to exercise the warrants will commence and expire;
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the manner in which the warrant agreement and warrants may be modified;
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•
federal income tax consequences of holding or exercising the warrants;
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the terms of the securities issuable upon exercise of the warrants; and
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•
any other specific terms, preferences, rights or limitations of or restrictions on the warrants.
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DESCRIPTION OF UNITS
We may issue units comprised of shares of common stock, shares of preferred stock, debt securities and warrants in any combination. We may issue units in such amounts and in as many distinct series as we wish. This section outlines certain provisions of the units that we may issue. If we issue units, they will be issued under one or more unit agreements to be entered into between us and a bank or other financial institution, as unit agent. The information described in this section may not be complete in all respects and is qualified entirely by reference to the unit agreement with respect to the units of any particular series. The specific terms of any series of units offered will be described in the applicable prospectus supplement. If so described in a particular supplement, the specific terms of any series of units may differ from the general description of terms presented below. We urge you to read any prospectus supplement related to any series of units we may offer, as well as the complete unit agreement and unit certificate that contain the terms of the units. If we issue units, forms of unit agreements and unit certificates relating to such units will be incorporated by reference as exhibits to the registration statement, which includes this prospectus.
Each unit that we may issue will be issued so that the holder of the unit is also the holder of each security included in the unit. Thus, the holder of a unit will have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately, at any time or at any time before a specified date. The applicable prospectus supplement may describe:
•
the designation and terms of the units and of the securities comprising the units, including whether and under what circumstances those securities may be held or transferred separately;
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•
any provisions of the governing unit agreement;
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•
the price or prices at which such units will be issued;
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•
the applicable United States federal income tax considerations relating to the units;
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•
any provisions for the issuance, payment, settlement, transfer or exchange of the units or of the securities comprising the units; and
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•
any other terms of the units and of the securities comprising the units.
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The provisions described in this section, as well as those described under “Description of Capital Stock,” “Description of Debt Securities” and “Description of Warrants” will apply to the securities included in each unit, to the extent relevant and as may be updated in any prospectus supplements.
Issuance in Series
We may issue units in such amounts and in as many distinct series as we wish. This section summarizes terms of the units that apply generally to all series. Most of the financial and other specific terms of a particular series of units will be described in the applicable prospectus supplement.
Unit Agreements
We will issue the units under one or more unit agreements to be entered into between us and a bank or other financial institution, as unit agent. We may add, replace or terminate unit agents from time to time. We will identify the unit agreement under which each series of units will be issued and the unit agent under that agreement in the applicable prospectus supplement.
The following provisions will generally apply to all unit agreements unless otherwise stated in the applicable prospectus supplement:
Modification without Consent
We and the applicable unit agent may amend any unit or unit agreement without the consent of any holder:
•
to cure any ambiguity; any provisions of the governing unit agreement that differ from those described below;
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•
to correct or supplement any defective or inconsistent provision; or
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•
to make any other change that we believe is necessary or desirable and will not adversely affect the interests of the affected holders in any material respect.
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We do not need any approval to make changes that affect only units to be issued after the changes take effect. We may also make changes that do not adversely affect a particular unit in any material respect, even if they adversely affect other units in a material respect. In those cases, we do not need to obtain the approval of the holder of the unaffected unit; we need only obtain any required approvals from the holders of the affected units.
Modification with Consent
We may not amend any particular unit or a unit agreement with respect to any particular unit unless we obtain the consent of the holder of that unit, if the amendment would:
•
impair any right of the holder to exercise or enforce any right under a security included in the unit if the terms of that security require the consent of the holder to any changes that would impair the exercise or enforcement of that right; or
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•
reduce the percentage of outstanding units or any series or class the consent of whose holders is required to amend that series or class, or the applicable unit agreement with respect to that series or class, as described below.
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Any other change to a particular unit agreement and the units issued under that agreement would require the following approval:
•
If the change affects only the units of a particular series issued under that agreement, the change must be approved by the holders of a majority of the outstanding units of that series; or
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•
If the change affects the units of more than one series issued under that agreement, it must be approved by the holders of a majority of all outstanding units of all series affected by the change, with the units of all the affected series voting together as one class for this purpose.
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These provisions regarding changes with majority approval also apply to changes affecting any securities issued under a unit agreement, as the governing document.
In each case, the required approval must be given by written consent.
Unit Agreements Will not be Qualified under Trust Indenture Act
No unit agreement will be qualified as an indenture, and no unit agent will be required to qualify as a trustee, under the Trust Indenture Act. Therefore, holders of units issued under unit agreements will not have the protections of the Trust Indenture Act with respect to their units.
Mergers and Similar Transactions Permitted; No Restrictive Covenants or Events of Default
The unit agreements will not restrict our ability to merge or consolidate with, or sell our assets to, another corporation or other entity or to engage in any other transactions. If at any time we merge or consolidate with, or sell our assets substantially as an entirety to, another corporation or other entity, the successor entity will succeed to and assume our obligations under the unit agreements. We will then be relieved of any further obligation under these agreements.
The unit agreements will not include any restrictions on our ability to put liens on our assets, nor will they restrict our ability to sell our assets. The unit agreements also will not provide for any events of default or remedies upon the occurrence of any events of default.
Governing Law
The unit agreements and the units will be governed by Delaware law.

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Form, Exchange and Transfer
We will issue each unit in global — i.e., book-entry — form only. Units in book-entry form will be represented by a global security registered in the name of a depositary, which will be the holder of all the units represented by the global security. Those who own beneficial interests in a unit will do so through participants in the depositary’s system, and the rights of these indirect owners will be governed solely by the applicable procedures of the depositary and its participants. We will describe book-entry securities, and other terms regarding the issuance and registration of the units in the applicable prospectus supplement.
Each unit and all securities comprising the unit will be issued in the same form.
If we issue any units in registered, non-global form, the following will apply to them.
The units will be issued in the denominations stated in the applicable prospectus supplement. Holders may exchange their units for units of smaller denominations or combined into fewer units of larger denominations, as long as the total amount is not changed.
Holders may exchange or transfer their units at the office of the unit agent. Holders may also replace lost, stolen, destroyed or mutilated units at that office. We may appoint another entity to perform these functions or perform them ourselves.
Holders will not be required to pay a service charge to transfer or exchange their units, but they may be required to pay for any tax or other governmental charge associated with the transfer or exchange. The transfer or exchange, and any replacement, will be made only if our transfer agent is satisfied with the holder’s proof of legal ownership. The transfer agent may also require an indemnity before replacing any units.
If we have the right to redeem, accelerate or settle any units before their maturity, and we exercise our right as to less than all those units or other securities, we may block the exchange or transfer of those units during the period beginning 15 days before the day we mail the notice of exercise and ending on the day of that mailing, in order to freeze the list of holders to prepare the mailing. We may also refuse to register transfers of or exchange any unit selected for early settlement, except that we will continue to permit transfers and exchanges of the unsettled portion of any unit being partially settled. We may also block the transfer or exchange of any unit in this manner if the unit includes securities that are or may be selected for early settlement.
Only the depositary will be entitled to transfer or exchange a unit in global form, since it will be the sole holder of the unit.
Payments and Notices
In making payments and giving notices with respect to our units, we will follow the procedures as described in the applicable prospectus supplement.

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PLAN OF DISTRIBUTION
We may sell securities:
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through underwriters;
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through dealers;
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through agents;
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directly to purchasers; or
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through a combination of any of these methods or any other method permitted by law.
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In addition, we may issue the securities as a dividend or distribution or in a subscription rights offering to our existing security holders.
We may also sell equity securities covered by this registration statement in an “at the market offering” as defined in Rule 415(a)(4) under the Securities Act. Such offering may be made into an existing trading market for such securities in transactions at other than a fixed price, either:
•
on or through the facilities of the Nasdaq Global Market or any other securities exchange or quotation or trading service on which such securities may be listed, quoted or traded at the time of sale; and/or
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•
to or through a market maker other than on the Nasdaq Global Market or such other securities exchanges or quotation or trading services.
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Such at-the-market offerings, if any, may be conducted by underwriters acting as principal or agent.
We may directly solicit offers to purchase securities, or agents may be designated to solicit such offers. In the prospectus supplement relating to such offering, we will name any agent that could be viewed as an underwriter under the Securities Act and describe any commissions that we must pay to any such agent. Any such agent will be acting on a best efforts basis for the period of its appointment or, if indicated in the applicable prospectus supplement, on a firm commitment basis. This prospectus may be used in connection with any offering of our securities through any of these methods or other methods described in the applicable prospectus supplement.
The distribution of the securities may be effected from time to time in one or more transactions:
•
at a fixed price, or prices, which may be changed from time to time;
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•
at market prices prevailing at the time of sale;
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•
at prices related to such prevailing market prices; or
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•
at negotiated prices.
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Each prospectus supplement will describe the method of distribution of the securities and any applicable restrictions.
The prospectus supplement with respect to the securities of a particular series will describe the terms of the offering of the securities, including the following:
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the name of the agent or any underwriters;
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•
the public offering or purchase price;
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•
any discounts and commissions to be allowed or paid to the agent or underwriters;
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•
all other items constituting underwriting compensation;
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•
any discounts and commissions to be allowed or paid to dealers; and
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•
any exchanges on which the securities will be listed.
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If any underwriters or agents are used in the sale of the securities in respect of which this prospectus is delivered, we will enter into an underwriting agreement, sales agreement or other agreement with them at

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the time of sale to them, and we will set forth in the prospectus supplement relating to such offering the names of the underwriters or agents and the terms of the related agreement with them.
In connection with the offering of securities, we may grant to the underwriters an option to purchase additional securities with an additional underwriting commission, as may be set forth in the accompanying prospectus supplement. If we grant any such option, the terms of such option will be set forth in the prospectus supplement for such securities.
If a dealer is used in the sale of the securities in respect of which the prospectus is delivered, we will sell such securities to the dealer, as principal. The dealer, who may be deemed to be an “underwriter” as that term is defined in the Securities Act, may then resell such securities to the public at varying prices to be determined by such dealer at the time of resale.
If we offer securities in a subscription rights offering to our existing security holders, we may enter into a standby underwriting agreement with dealers, acting as standby underwriters. We may pay the standby underwriters a commitment fee for the securities they commit to purchase on a standby basis. If we do not enter into a standby underwriting arrangement, we may retain a dealer-manager to manage a subscription rights offering for us.
Agents, underwriters, dealers and other persons may be entitled under agreements which they may enter into with us to indemnification by us against certain civil liabilities, including liabilities under the Securities Act, and may be customers of, engage in transactions with or perform services for us in the ordinary course of business.
If so indicated in the applicable prospectus supplement, we will authorize underwriters or other persons acting as our agents to solicit offers by certain institutions to purchase securities from us pursuant to delayed delivery contracts providing for payment and delivery on the date stated in the prospectus supplement. Each contract will be for an amount not less than, and the aggregate amount of securities sold pursuant to such contracts shall not be less nor more than, the respective amounts stated in the prospectus supplement. Institutions with whom the contracts, when authorized, may be made include commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and other institutions, but shall in all cases be subject to our approval. Delayed delivery contracts will not be subject to any conditions except that:
•
the purchase by an institution of the securities covered under that contract shall not at the time of delivery be prohibited under the laws of the jurisdiction to which that institution is subject; and
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•
if the securities are also being sold to underwriters acting as principals for their own account, the underwriters shall have purchased such securities not sold for delayed delivery. The underwriters and other persons acting as our agents will not have any responsibility in respect of the validity or performance of delayed delivery contracts.
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Offered securities may also be offered and sold, if so indicated in the prospectus supplement, in connection with a remarketing upon their purchase, in accordance with a redemption or repayment pursuant to their terms, or otherwise, by one or more remarketing firms, acting as principals for their own accounts or as agents for us. Any remarketing firm will be identified and the terms of its agreement, if any, with us and its compensation will be described in the applicable prospectus supplement. Remarketing firms may be deemed to be underwriters in connection with their remarketing of offered securities.
Certain agents, underwriters and dealers, and their associates and affiliates, may be customers of, have borrowing relationships with, engage in other transactions with, or perform services, including investment banking services, for us or one or more of our respective affiliates in the ordinary course of business.
In order to facilitate the offering of the securities, any underwriters may engage in transactions that stabilize, maintain or otherwise affect the price of the securities or any other securities the prices of which may be used to determine payments on such securities. Specifically, any underwriters may overallot in connection with the offering, creating a short position for their own accounts. In addition, to cover overallotments or to stabilize the price of the securities or of any such other securities, the underwriters may bid for, and purchase, the securities or any such other securities in the open market. Finally, in any offering of the securities through a syndicate of underwriters, the underwriting syndicate may reclaim selling

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concessions allowed to an underwriter or a dealer for distributing the securities in the offering if the syndicate repurchases previously distributed securities in transactions to cover syndicate short positions, in stabilization transactions or otherwise. Any of these activities may stabilize or maintain the market price of the securities above independent market levels. Any such underwriters are not required to engage in these activities and may end any of these activities at any time.
We may engage in at-the-market offerings into an existing trading market in accordance with Rule 415(a)(4) under the Securities Act. In addition, we may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement so indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or borrowed from us or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock. The third party in such sale transactions will be an underwriter and, if not identified in this prospectus, will be named in the applicable prospectus supplement (or a post-effective amendment). In addition, we may otherwise loan or pledge securities to a financial institution or other third party that in turn may sell the securities short using this prospectus and an applicable prospectus supplement. Such financial institution or other third party may transfer its economic short position to investors in our securities or in connection with a concurrent offering of other securities.
Under Rule 15c6-1 of the Exchange Act, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. The applicable prospectus supplement may provide that the original issue date for your securities may be more than two scheduled business days after the trade date for your securities. Accordingly, in such a case, if you wish to trade securities on any date prior to the second business day before the original issue date for your securities, you will be required, by virtue of the fact that your securities initially are expected to settle in more than two scheduled business days after the trade date for your securities, to make alternative settlement arrangements to prevent a failed settlement.
The securities may be new issues of securities and may have no established trading market. The securities may or may not be listed on a national securities exchange. We can make no assurance as to the liquidity of or the existence of trading markets for any of the securities.
The specific terms of any lock-up provisions in respect of any given offering will be described in the applicable prospectus supplement.
The underwriters, dealers and agents may engage in transactions with us, or perform services for us, in the ordinary course of business for which they receive compensation.
The anticipated date of delivery of offered securities will be set forth in the applicable prospectus supplement relating to each offer.

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LEGAL MATTERS
Certain legal matters in connection with this offering will be passed upon for us by Goodwin Procter LLP, Boston, Massachusetts. Any underwriters will also be advised about the validity of the securities and other legal matters by their own counsel, which will be named in the prospectus supplement.
EXPERTS
The financial statements incorporated in this prospectus by reference to the Annual Report on Form 10-K for the year ended December 31, 2021 have been so incorporated in reliance on the report (which contains an emphasis of matter paragraph relating to the Company’s requirement for additional financing to fund future operations as described in Note 2 to the financial statements) of PwC Wirtschaftsprufung GmbH, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting. PwC Wirtschaftsprufung GmbH is a member of the Austrian Chamber of Tax Advisors and Public Accountants (Kammer der Steuerberater und Wirtschaftsprufer).
WHERE YOU CAN FIND MORE INFORMATION
This prospectus is part of a registration statement we filed with the SEC. This prospectus does not contain all of the information set forth in the registration statement and the exhibits to the registration statement. For further information with respect to us and the securities we are offering under this prospectus, we refer you to the registration statement and the exhibits and schedules filed as a part of the registration statement. You should rely only on the information contained in this prospectus or incorporated by reference. We have not authorized anyone else to provide you with different information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume that the information in this prospectus is accurate as of any date other than the date on the front page of this prospectus, regardless of the time of delivery of this prospectus or any sale of the securities offered by this prospectus.
We file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains a website that contains reports, proxy statements and other information regarding issuers that file electronically with the SEC, including HOOKIPA Pharma Inc. The address of the SEC website is www.sec.gov.
We maintain a website at www.hookipapharma.com. Information contained on, or that can be accessed through, our website is not incorporated by reference into this prospectus and, therefore, is not part of this prospectus or any accompanying prospectus supplement

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INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
The SEC allows us to incorporate by reference much of the information we file with the SEC, which means that we can disclose important information to you by referring you to those publicly available documents. The information that we incorporate by reference in this prospectus is considered to be part of this prospectus.
Because we are incorporating by reference future filings with the SEC, this prospectus is continually updated and those future filings may modify or supersede some of the information included or incorporated in this prospectus. This means that you must look at all of the SEC filings that we incorporate by reference to determine if any of the statements in this prospectus or in any document previously incorporated by reference have been modified or superseded. This prospectus incorporates by reference the documents listed below and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (in each case, other than those documents or the portions of those documents not deemed to be filed) between the date of the initial registration statement and the effectiveness of the registration statement and following the effectiveness of the registration statement until the offering of the securities under the registration statement is terminated or completed:
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our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 filed with the SEC on March 24, 2022 as amended by our Annual Report on Form 10-K/A filed with the SEC on May 2, 2022;
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•
our Definitive Proxy Statement filed with the SEC on May 16, 2022, to the extent the information therein is filed and not furnished;
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•
our Quarterly Report on Form 10-Q for the quarter ended March 31, 2022 filed with the SEC on May 16, 2022;
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•
our Current Reports on Form 8-K and Form 8-K/A filed with the SEC on February 1, 2022, February 15, 2022, March 1, 2022(both filings), March 3, 2022, April 20, 2022, May 2, 2022, June 6, 2022, June 22, 2022 and July 1, 2022; and
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•
the description of our common stock contained in our Registration Statement on Form 8-A filed with the SEC on April 15, 2019, and any further amendment or report filed hereafter for the purpose of updating such description pursuant to Section 12(b) of the Exchange Act.
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We also incorporate by reference into this prospectus all documents (other than current reports furnished under Item 2.02 or Item 7.01 of Form 8-K and exhibits filed on such form that are related to such items) that are filed by us with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (i) after the date of the initial filing of the registration statement of which this prospectus forms a part and prior to effectiveness of the registration statement, and (ii) after the date of this prospectus but prior to the termination of the offering. These documents include, without limitation, Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, as well as proxy statements.
We will provide to each person, including any beneficial owner, to whom a prospectus is delivered, without charge upon written or oral request, a copy of any or all of the information that has been incorporated by reference into this prospectus but not delivered with the prospectus, including exhibits that are specifically incorporated by reference into such documents. You should direct any requests for such information to:
HOOKIPA Pharma Inc.
350 Fifth Avenue, 72nd Floor, Suite 7240
New York, New York 10118
+43 1 890 63 60

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The information contained in this prospectus is not complete and may be changed. These securities may not be sold until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.
Subject to Completion, Dated July 12, 2022
PROSPECTUS
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Up to $50,000,000
Common Stock
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We have entered into a sales agreement, or the sales agreement, with SVB Securities LLC, or SVB Securities, relating to shares of our common stock offered by this prospectus. In accordance with the terms of the sales agreement, we may offer and sell shares of our common stock having an aggregate offering price of up to $50,000,000 from time to time through or to SVB Securities, as sales agent or principal.
Our common stock is listed on the Nasdaq Global Select Market, or the Exchange, under the symbol “HOOK.” On July 11, 2022, the last reported sale price of our common stock was $1.84 per share.
Sales of our common stock, if any, under this prospectus will be made in sales deemed to be “at the market offerings” as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended, or the Securities Act. SVB Securities is not required to sell any specific number or dollar amount of securities, but will act as a sales agent using commercially reasonable efforts consistent with its normal trading and sales practices, on mutually agreed terms between SVB Securities and us. There is no arrangement for funds to be received in any escrow, trust or similar arrangement.
The compensation to SVB Securities for sales of common stock sold pursuant to the sales agreement will be an amount equal to 3.0% of the gross proceeds of any shares of common stock sold under the sales agreement. In connection with the sale of the common stock on our behalf, SVB Securities will be deemed to be an “underwriter” within the meaning of the Securities Act and the compensation of SVB Securities will be deemed to be underwriting commissions or discounts. We have also agreed to provide indemnification and contribution to SVB Securities with respect to certain liabilities, including liabilities under the Securities Act.
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Our business and an investment in our common stock involve significant risks. You should review carefully the risks and uncertainties described under the heading “Risk Factors” on page 6 of this prospectus and under similar headings in the other documents that are incorporated by reference into this prospectus.
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Neither the securities and exchange commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus and the accompanying prospectus are truthful or complete. Any representation to the contrary is a criminal offense.
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SVB Securities
                 , 2022
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Table of Contents
​​​Page​
ABOUT THIS PROSPECTUS
​​​​1​​
PROSPECTUS SUMMARY
​​​​2​​
THE OFFERING
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RISK FACTORS
​​​​6​​
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
​​​​7​​
USE OF PROCEEDS
​​​​9​​
PLAN OF DISTRIBUTION
​​​​10​​
LEGAL MATTERS
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EXPERTS
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WHERE YOU CAN FIND MORE INFORMATION
​​​​11​​
INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
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ABOUT THIS PROSPECTUS
This prospectus is part of a registration statement on Form S-3 that we have filed with the Securities and Exchange Commission, or SEC, utilizing a “shelf” registration process. Under this shelf registration process, we may offer any combination of our securities described in our base prospectus included in the shelf registration statement in one or more offerings up to a total aggregate offering price of $200,000,000. The $50,000,000 of common stock that may be offered, issued and sold under this prospectus is included in the $200,000,000 of securities that may be offered, issued and sold by us pursuant to our shelf registration statement.
This prospectus relates to the offering of our common stock. Before buying any of the common stock that we are offering, we urge you to carefully read this prospectus, together with the information incorporated by reference in this prospectus, and any free writing prospectus or prospectus supplement that we have authorized for use in connection with this offering when making your investment decision. You should also read and consider the information in the documents we have referred you to under the headings “Where You Can Find More Information” and “Incorporation of Certain Information by Reference.” These documents contain important information that you should consider when making your investment decision.
This prospectus describes the terms of this offering of common stock and also adds to and updates information contained in the documents incorporated by reference into this prospectus. To the extent there is a conflict between the information contained in this prospectus, on the one hand, and the information contained in any document incorporated by reference into this prospectus that was filed with the SEC before the date of this prospectus, on the other hand, you should rely on the information in this prospectus. If any statement in one of these documents is inconsistent with a statement in another document having a later date — for example, a document incorporated by reference into this prospectus — the statement in the document having the later date modifies or supersedes the earlier statement.
You should rely only on the information contained in or incorporated by reference in this prospectus, and any free writing prospectus or prospectus supplement that we have authorized for use in connection with this offering. We have not, and the sales agent has not, authorized anyone to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not, and the sales agent is not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted.
You should assume that the information appearing in this prospectus, the documents incorporated by reference in this prospectus, and any free writing prospectus or prospectus supplement that we have authorized for use in connection with this offering, is accurate only as of the date of those respective documents. Our business, financial condition, results of operations and prospects may have changed since those dates. You should read this prospectus, the documents incorporated by reference in this prospectus, and any free writing prospectus or prospectus supplement that we have authorized for use in connection with this offering, in their entirety before making an investment decision.
Unless otherwise mentioned or unless the context requires otherwise, all references in this prospectus to “HOOKIPA Pharma,” “HOOKIPA,” “company,” “we,” “us” and “our” or similar references refer to HOOKIPA Pharma Inc. and, where appropriate, our subsidiary.
This prospectus and the information incorporated by reference herein include trademarks, service marks and trade names owned by us or other companies. All trademarks, service marks and trade names included or incorporated by reference into this prospectus are the property of their respective owners.

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PROSPECTUS SUMMARY
This summary highlights certain information about us, this offering and selected information contained elsewhere in or incorporated by reference into this prospectus. This summary is not complete and does not contain all of the information that you should consider before deciding whether to invest in our common stock. For a more complete understanding of our company and this offering, we encourage you to read and consider carefully the more detailed information in this prospectus, including the information incorporated by reference in this prospectus, and the information included in any free writing prospectus that we have authorized for use in connection with this offering, including the information under the heading “Risk Factors” in this prospectus on page 6 and under similar headings in the documents incorporated by reference into this prospectus.
Overview
We are a clinical-stage biopharmaceutical company developing a new class of immunotherapeutics based on our proprietary arenavirus platform that is designed to target and amplify T cell immune responses to disease. We believe that our technologies can meaningfully leverage the human immune system for prophylactic and therapeutic purposes by inducing CD8+ T cell response levels previously not achieved by other immunotherapy approaches.
We are building a proprietary immuno-oncology pipeline by targeting oncoviral cancer antigens, self-antigens and next-generation antigens. Our oncology portfolio includes three disclosed programs, HB-200, HB-300, and HB-700, which all use our replicating technology. HB-200 is in clinical development for the treatment of Human Papillomavirus 16-positive cancers, or HPV16+, in an ongoing Phase 1/2 clinical trial. HB-300 is in development for the treatment of prostate cancer and expected to move into the clinic after our planned third quarter 2022 filing of an investigational new drug application filing. HB-700 is our newest asset in preclinical development for treatment of KRAS mutated cancers, including, lung, colorectal and pancreatic cancers.
Our HB-200 program is comprised of HB-201 single vector therapy and HB-201/HB-202 two vector therapy. Both therapies have been evaluated in Phase 1 portion of the study, and Phase 2 is ongoing, evaluating HB-202/HB-201 alone in the post standard of care setting and in combination with pembrolizumab in 1st line and 2nd plus line settings. In November 2021, we announced interim data from our Phase 1 portion of the study, showing promising anti-tumor activity against advanced/metastatic HPV16+ cancers and favorable tolerability. In June 2022, we announced Phase 1 results, showing superior immune response generated by alternating two-vector therapy. Data demonstrated responses and stable disease in head and neck cancer patients who failed prior standard of care therapy.
In September 2021, we entered into a clinical collaboration with Merck & Co., Inc. to evaluate the combination of HB-200 and Merck & Co., Inc’s anti-PD-1 therapy, KEYTRUDA® (pembrolizumab) in a separate randomized Phase 2 trial. In January 2022, we dosed the first patient with a combination of HB-201 and pembrolizumab for the treatment of first line advanced/metastatic HPV16+ HNSCC in the Phase 2 expansion portion of the ongoing Phase 1/2 trial.
Our non-replicating prophylactic Cytomegalovirus, or CMV, vaccine candidate, HB-101, is a potential first in-class compound in a Phase 2 clinical trial for patients awaiting kidney transplantation. In November 2021, we reported safety, immunogenicity and efficacy data, whereby the three-dose schedule of HB-101 pre-transplantation showed a trend of reducing incidence of CMV viremia and antiviral use. The trial will continue to follow patients currently on-study with final top-line data readout in the first half of 2023. We have decided to pursue HB-101 further only if we are able to partner the program with a collaborator, thereby enabling greater strategic focus on the immuno-oncology programs.
We entered into a collaboration and licensing agreement with Gilead Sciences, Inc., or Gilead, in June 2018 to research arenavirus functional cures for HIV and chronic Hepatitis B infections. In February 2022, we signed an amended and restated collaboration and licensing agreement which revised the terms only for the HIV program, whereby we will take on development responsibilities for the HIV program candidate through a Phase 1b clinical trial.

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Our Pipeline
We are leveraging our modular arenavirus platform to develop the following product candidates for multiple infectious diseases and cancers:
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Corporate Information
We were originally incorporated as Hookipa Biotech AG under the laws of Austria in 2011. In February 2017, we reorganized to become a corporation under the laws of the State of Delaware as Hookipa Biotech, Inc., which was a fully-owned subsidiary of Hookipa Biotech AG. In June 2018, Hookipa Biotech, Inc. changed its name to HOOKIPA Pharma Inc. and acquired all of the shares of Hookipa Biotech AG, now Hookipa Biotech GmbH.
Our principal executive offices are located at 350 Fifth Avenue, 72nd Floor, Suite 7240, New York, New York 10118 and our telephone number is +43 1 890 63 60. Our website address is www.hookipapharma.com. Information contained on, or that can be accessed through, our website is not incorporated by reference into this prospectus and, therefore, is not part of this prospectus or any accompanying prospectus supplement.
Implications of Being an Emerging Growth Company and a Smaller Reporting Company
We are an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act, or the JOBS Act, enacted in April 2012. For so long as we remain an emerging growth company, we are permitted and intend to rely on certain exemptions from various public company reporting requirements, including not being required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm pursuant to Section 404(b) of the Sarbanes-Oxley Act of 2002, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and any golden parachute payments not previously approved. In particular, in this prospectus, we have not included or incorporated by reference all of the executive compensation-related information that would be required if we were not an emerging growth company. Accordingly, the information contained herein may be different than the information you receive from other public companies in which you hold stock.
We will remain an emerging growth company until the earlier to occur of (1) the last day of the fiscal year (a) following April 18, 2024, (b) in which we have total annual gross revenues of at least $1.07 billion or (c) in which we are deemed to be a “large accelerated filer,” under the rules of the SEC, which means the market value of our equity securities that is held by non-affiliates exceeds $700 million as of the prior June 30th, and (2) the date on which we have issued more than $1.0 billion in non-convertible debt during the prior three-year period.
 
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In addition, the JOBS Act provides that an emerging growth company can take advantage of an extended transition period for complying with new or revised accounting standards. This provision allows an emerging growth company to delay the adoption of some accounting standards until those standards would otherwise apply to private companies. We have irrevocably elected not to avail ourselves of delayed adoption of new or revised accounting standards and, therefore, we will be subject to the same requirements to adopt new or revised accounting standards as other public companies that are not emerging growth companies.
We are also a “smaller reporting company” meaning that the market value of our stock held by non-affiliates is less than $700 million and our annual revenue was less than $100 million during our most recently completed fiscal year. We may continue to be a smaller reporting company if either (i) the market value of our stock held by non-affiliates is less than $250 million or (ii) our annual revenue was less than $100 million during the most recently completed fiscal year and the market value of our stock held by non-affiliates is less than $700 million. If we are a smaller reporting company at the time we cease to be an emerging growth company, we may continue to rely on exemptions from certain disclosure requirements that are available to smaller reporting companies. For so long as we remain a smaller reporting company, we are permitted and intend to rely on exemptions from certain disclosure and other requirements that are applicable to other public companies that are not smaller reporting companies.
 
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THE OFFERING
Common Stock Offeredstock offered by the Selling Stockholderus
1,666,666Shares of our common stock having an aggregate offering price of up to $50,000,000.
Common stock to be outstanding immediately after this offering
Up to 81,866,379 shares, assuming sales of 27,173,913 shares of our common stock in this offering at an offering price of $1.84 per share, which was the last reported sale price of our common stock on the Nasdaq Global Select Market on July 11, 2022. The actual number of shares issued will vary depending on the sales price under this offering
Manner of offering
“At the market offering” that may be made from time to time through or to SVB Securities LLC, or SVB Securities, as sales agent or principal. See “Plan of Distribution” on page 10 of this prospectus.
Use of proceeds
We currently intend to use the net proceeds from this offering primarily for general corporate purposes. See “Use of Proceeds” on page 9 of this prospectus.
Risk factors
Investing in our common stock involves significant risks. See “Risk Factors” on page 6 of this prospectus, and under similar headings in other documents incorporated by reference into this prospectus and the accompanying prospectus.
Nasdaq Global Select Market Symbol
“HOOK”
The number of shares of common stock
Use of Proceeds
We will not receive any proceeds from the sale of the common stock covered by shown above to be outstanding after this prospectus.
Nasdaq Capital Market
Symbol
HOOK
Offering Price
The selling stockholder will offer theoffering is based on 50,872,734 shares of common stock offered by this prospectusand 3,819,732 shares of Class A common stock outstanding as of March 31, 2022, and excludes as of that date:
•
4,298,946 shares of common stock issuable upon the exercise of stock options outstanding as of March 31, 2022, at the prevailing market prices or a privately negotiated price.weighted-average exercise price of $8.96 per share;
Risk Factors
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You should read the “Risk Factors” section•
1,327,634 shares of this prospectuscommon stock that are available for a discussionfuture issuance under our 2019 Stock Option and Incentive Plan, as of factors to consider carefully before deciding to invest inMarch 31, 2022;
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•
828,497 shares of our common stock.stock available for future issuance as of March 31, 2022 under our 2019 Employee Stock Purchase Plan;
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•
1,697,000 shares of our common stock issuable upon conversion of 1,697 shares of our Series A convertible preferred stock outstanding as of March 31, 2022; and
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•
15,800,000 shares of our common stock issuable upon conversion of 15,800 shares of our Series A-1 preferred stock outstanding as of March 31, 2022.
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RISK FACTORS
InvestmentInvesting in anyour securities offered pursuant to this prospectus involves risks.a high degree of risk. You should carefully considerreview the risk factors incorporated by reference torisks and uncertainties described below and under the section titled “Risk Factors” in our most recent Quarterly Report on Form 10-Q and our most recent Annual Report on Form 10-K for the year ended December 31, 2021, as updated by our annual, quarterly and in any subsequent Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q or Current Reports on Form 8-K we file after the date of this prospectus,other reports and all other information contained ordocuments that are incorporated by reference into this prospectus as updatedand any free writing prospectus with respect to this offering filed by us with the SEC, before deciding whether to invest in our subsequent filings under the Exchange Act, andcommon stock. Each of the risk factors could adversely affect our business, operating results and other information containedfinancial condition, as well as adversely affect the value of an investment in our securities, and the applicable prospectus supplement before acquiring any of such securities. The occurrence of any of these risks might cause you to lose all or part of your investmentinvestment. Additional risks not presently known to us or that we currently believe are immaterial may also significantly impair our business operations. Please also read carefully the section below titled “Special Note Regarding Forward-Looking Statements.”
Additional Risks Related to This Offering
You may experience future dilution as a result of future equity offerings.
To raise additional capital, we may in the offered securities.
USE OF PROCEEDS
We will not receive any of the proceeds from the sale offuture offer additional shares of our common stock or other securities convertible into or exchangeable for our common stock at prices that may not be the same as the price per share in this offering. We may sell shares or other securities in any other offering at a price per share that is less than the price per share paid by investors in this offering, and investors purchasing shares or other securities in the future could have rights superior to existing stockholders. The selling stockholder will receive allprice per share at which we sell additional shares of our common stock, or securities convertible or exchangeable into common stock, in future transactions may be higher or lower than the price per share paid by investors in this offering.
Our management might apply the net proceeds from this offering.offering in ways with which you do not agree and in ways that may impair the value of your investment.
The selling stockholderOur management will payhave broad discretion over the use of net proceeds from this offering, if any. We intend to use the net proceeds from this offering, if any, underwriting discountsfor general corporate purposes, which may include, but are not limited to, research and commissionsdevelopment costs, including the conduct of one or more clinical trials and expenses incurred by the selling stockholder for brokerage, accounting, tax or legalprocess development and manufacturing of our product candidates, potential strategic acquisitions of complementary businesses, services or technologies, expansion of our technology infrastructure and capabilities, working capital, capital expenditures and other general corporate purposes. Our management will have considerable discretion in the application of the net proceeds, if any, and you will not have the opportunity, as part of your investment decision, to assess whether the proceeds are being used appropriately. The net proceeds, if any, may be used for corporate purposes that do not increase our operating results or enhance the value of our common stock.
The common stock offered hereby will be sold in “at-the-market” offerings, and investors who buy shares at different times will likely pay different prices.
Investors who purchase shares in this offering at different times will likely pay different prices, and so may experience different outcomes in their investment results. We will have discretion, subject to market demand, to vary the timing, prices, and numbers of shares sold, and there is no minimum or maximum sales price. Investors may experience a decline in the value of their shares as a result of share sales made at prices lower than the prices they paid.
The actual number of shares we will issue under the sales agreement, at any one time or in total, is uncertain.
Subject to certain limitations in the sales agreement and compliance with applicable law, we have the discretion to deliver placement notices to SVB Securities at any time throughout the term of the sales agreement. The number of shares that are sold by SVB Securities after delivering a placement notice will fluctuate based on the market price of the common stock during the sales period and limits we set with SVB Securities. Because the price per share of each share sold will fluctuate based on the market price of our common stock during the sales period, it is not possible at this stage to predict the number of shares that will be ultimately issued.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This prospectus, including the documents that we incorporate by reference, contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Any statements about our expectations, beliefs, plans, objectives, assumptions or future events or performance are not historical facts and may be forward-looking. These statements are often, but are not always, made through the use of words or phrases such as “may,” “will,” “could,” “should,” “expects,” “intends,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “projects,” “potential,” “continue,” and similar expressions, or the negative of these terms, or similar expressions. Accordingly, these statements involve estimates, assumptions, risks and uncertainties which could cause actual results to differ materially from those expressed in them. Any forward-looking statements are qualified in their entirety by reference to the factors discussed throughout this prospectus, and in particular those factors referenced in the section “Risk Factors.”
This prospectus, including the documents that we incorporate by reference, contain forward-looking statements that are based on our management’s belief and assumptions and on information currently available to our management. These statements relate to future events or our future financial performance, and involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. Forward-looking statements include, but are not limited to, statements about:
•
the success, cost and timing of our product development activities and clinical trials;
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•
the timing, scope or likelihood of regulatory filings and approvals, including timing of Investigational New Drug Application and Biological Licensing Application filings for our current and future product candidates, and final FDA, European Medicines Agency or other foreign regulatory authority approval of our current and future product candidates;
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•
our ability to develop and advance our current product candidates and programs into, and successfully complete, clinical studies;
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•
our manufacturing, commercialization and marketing capabilities and strategy;
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•
the potential benefits of and our ability to maintain our collaboration with Gilead, and establish or maintain future collaborations or strategic relationships or obtain additional funding;
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•
the rate and degree of market acceptance and clinical utility of our current and future product candidates;
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•
our intellectual property position, including the scope of protection we are able to establish and maintain for intellectual property rights covering our non-replicating and replicating technologies and the product candidates based on these technologies, the validity of intellectual property rights held by third parties, and our ability not to infringe, misappropriate or otherwise violate any third-party intellectual property rights;
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•
our ability to successfully identify and enter into collaborations to advance the breadth of our programs, and the commercial success of any such collaboration;
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•
future agreements with third parties in connection with the commercialization of our product candidates and any other expenses incurred byapproved product;
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•
regulatory developments in the selling stockholder in disposingUnited States and foreign countries;
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the effects of the sharesongoing coronavirus pandemic on business and operations;
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•
competitive companies, technologies and our industry and the success of common stock coveredcompeting therapies that are or may become available;
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•
our ability to attract and retain key scientific or management personnel;
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our ability to obtain funding for our operations, including funding necessary to complete further development and commercialization of our product candidates;
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the accuracy of our estimates of our annual total addressable market, future revenue, expenses, capital requirements and needs for additional financing;
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•
our expectations about market trends; and
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our expectations regarding the period during which we qualify as an emerging growth company under the Jumpstart Our Business Startups Act of 2012, as amended.
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This prospectus and the documents incorporated by prospectus. We will bear allreference also contain estimates, projections and other costs, feesinformation concerning our industry, our business, and expenses incurredthe markets for certain diseases, including data regarding the estimated size of those markets, and the incidence and prevalence of certain medical conditions. Information that is based on estimates, forecasts, projections, market research or similar methodologies is inherently subject to uncertainties and actual events or circumstances may differ materially from events and circumstances reflected in effecting the registration of the shares coveredthis information. Unless otherwise expressly stated, we obtained this industry, business, market and other data from reports, research surveys, studies and similar data prepared by market research firms and other third parties, industry, medical and general publications, government data and similar sources.
You should read this prospectus including, without limitation, all registration and filing fees, Nasdaq listing feesthe documents that we incorporate by reference in this prospectus completely and feeswith the understanding that our actual future results may be materially different from what we expect. The forward-looking statements in this prospectus and expensesthe documents we incorporate by reference herein represent our views as of their respective dates. We anticipate that subsequent events and developments will cause our counsel andviews to change. However, while we may elect to update these forward-looking statements at some point in the future, we have no current intention of doing so except to the extent required by applicable law. You should, therefore, not rely on these forward-looking statements as representing our accountants.views as of any date subsequent to the date of this prospectus.
 
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SELLING STOCKHOLDERUSE OF PROCEEDS
This prospectus covers the resale or other disposition from time to time by the selling stockholder identified in the table below of up to an aggregate of 1,666,666 shares of our common stock, which consists of 1,666,666 shares of our common stock issuedWe may issue and sold to Gilead in connection with the 2022 Private Placement.
On the Effective Date, we entered into the Stock Purchase Agreement, pursuant to which Gilead is required, at our option, to purchase up to $35,000,000 of our common stock. On the Effective Date, Gilead purchased an initial amount of 1,666,666 unregistered shares of our common stock in exchange for approximately $5.0 million at a purchase price per share equal to $3.00. Pursuant to the terms of the Stock Purchase Agreement, we may require Gilead to purchase the balance of the $30.0 million of common stock in two subsequent purchases. If we exercise our right to require Gilead to purchase such balance, the purchase price per share of the first subsequent purchase shall be equal to (a) the VWAP Purchase Price (as defined in the Stock Purchase Agreement), calculated at the date we exercise our right to require Gilead to purchase shares, plus (b) a premium of 30% on the VWAP Purchase Price, and the purchase price per share of the second subsequent purchase shall be equal to the VWAP Purchase Price, calculated at the date the Company exercises its right to require Gilead to purchase shares. Our ability to sell shares of our common stock to Gilead is subject to specified limitations, including compliance with Nasdaq Rule 5635(d) and continued compliance with the Nasdaq listing rules. The Stock Purchase Agreement also prohibits Gilead from purchasing shares of our common stock if such purchase would result in Gilead being a beneficial owner of more than 19.9% of the total number of our then-issued and outstanding shares of common stock.
This prospectus covers the resale or other disposition by the selling stockholder or its transfereeshaving aggregate sales proceeds of up to the total number of shares of common stock issued to the selling stockholder pursuant to the Stock Purchase Agreement. Throughout this prospectus, when we refer to the selling stockholder, we are referring to the purchaser under the Stock Purchase Agreement.
We are registering the above-referenced shares to permit the selling stockholder and its pledgees, donees, transferees or other successors-in-interest that receive its shares after the date of this prospectus to resell or otherwise dispose of the shares in the manner contemplated under “Plan of Distribution” herein.
Except as otherwise disclosed herein, the selling stockholder does not have, and within the past three years has not had, any position, office or other material relationship with us.
The following table sets forth the name of the selling stockholder, the number of shares owned by the selling stockholder, the number of shares that may be offered under this prospectus and the number of shares of our common stock owned by the selling stockholder assuming all of the shares registered for resale hereby are sold. The number of shares in the column “Number of Shares Being Offered” represents all of the shares that the selling stockholder may offer under this prospectus. The selling stockholder may sell some, all or none of its shares. We do not know how long the selling stockholder will hold the shares before selling them, and we currently have no agreements, arrangements or understandings with the selling stockholder regarding the sale or other disposition of any of the shares. The shares covered hereby may be offered$50,000,000 from time to time bytime. Because there is no minimum offering amount required as a condition to close this offering, the selling stockholder.actual total public offering amount, commissions and proceeds to us, if any, are not determinable at this time. There can be no assurance that we will sell any shares under or fully utilize the sales agreement with SVB Securities as a source of financing. Our management will have broad discretion over the use of net proceeds from this offering, if any.
The information set forth below is based upon information obtainedWe currently intend to use the net proceeds from this offering primarily for general corporate purposes, which may include, but are not limited to, research and development costs, including the selling stockholderconduct of one or more clinical trials and upon information in our possession regarding the issuance of shares of common stockprocess development and warrants to the selling stockholder in connection with the 2022 Private Placement. The percentages of shares owned after the offering are based on 50,884,796 sharesmanufacturing of our common stock outstanding asproduct candidates, potential strategic acquisitions of June 30, 2022, including the sharescomplementary businesses, services or technologies, expansion of common stock registered for resale hereby.
Name of Selling Stockholder​​
Shares of Common
Stock Beneficially
Owned Prior to
Offering(1)
​​
Number of Shares
Being Offered
​​
Shares of Common Stock
Beneficially Owned
After Offering(2)
​
​Number​​Percent​
Gilead Sciences, Inc.(3)
​​​​3,759,465​​​​​1,666,666​​​​​2,092,799​​​​​4.11​​
​
(1)
“Beneficial ownership” is a term broadly defined by the SEC in Rule 13d-3 under the Exchange Act,our technology infrastructure and includes more than the typical form of stock ownership, that is, stock held in the person’s name. The
​capabilities, working capital, capital expenditures and other general corporate purposes.
 
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term also includes what is referred to as “indirect ownership,” meaning ownership of shares as to which a person has or shares investment power. For purposes of this table, a person or group of persons is deemed to have “beneficial ownership” of any shares that are currently exercisable or exercisable within 60 days of July 11, 2022.
(2)
Assumes that all shares being registered in this prospectus are resold to third parties and that the selling stockholder sells all shares of common stock registered under this prospectus held by such selling stockholder.
​
(3)
Consists of 3,759,465 shares of common stock. The address for Gilead is 333 Lakeside Drive, Foster City, California, 94404.
​
Relationship with the Selling Stockholder
In addition to the Stock Purchase Agreement, on June 17, 2022, in connection with the 2022 Private Placement, we entered into a registration rights agreement with the selling stockholder, or the Registration Rights Agreement.
Registration Rights Agreement
Pursuant to the Registration Rights Agreement with the selling stockholder, we agreed to prepare and file with the SEC a registration statement that permits the resale of the selling stockholder’s shares and, subject to certain exceptions, use commercially reasonable efforts to keep the registration statement of which this prospectus forms a part continuously effective under the Securities Act until the earlier of (i) such time as all of the Registrable Securities (as defined in the Registration Rights Agreement) covered by such registration statement have been publicly sold by the selling stockholder and (ii) the date on which the selling stockholder ceases to hold Registrable Securities.
We have also agreed, among other things, to indemnify the selling stockholder and its officers, directors, members, employees and agents, successors and assigns under the registration statement from certain liabilities and to pay all fees and expenses (excluding any legal fees of the selling stockholder, and any underwriting discounts and selling commissions) incident to our obligations under the Registration Rights Agreement.
Gilead Collaboration Agreement and Stock Purchase Agreement
Overview
On June 4, 2018, we entered into a Research Collaboration and License Agreement, or the Collaboration Agreement, with Gilead to collaborate on preclinical research programs to evaluate potential vaccine products using or incorporating our replicating and non-replicating technology platforms for the treatment, cure, diagnosis or prevention of Hepatitis B Virus, or HBV, or HIV, which we refer to, collectively, as the Field.
Pursuant to the Collaboration Agreement, we granted Gilead an exclusive (even as to us and our affiliates), worldwide, royalty-bearing license to our knowhow and our owned and in-licensed patent rights (including those patent rights in-licensed from the University of Geneva, the University of Basel and the University of Zurich) that are necessary or reasonably useful for researching, developing, manufacturing or commercializing products that contain a vaccine that uses our replicating or non-replicating technology platforms for expressing one or more HIV or Hepatitis B Virus antigens, which foregoing knowhow and patent rights we refer to as the Licensed Technology (and each such product a Licensed Product), for the purpose of researching, developing, manufacturing and commercializing Licensed Products for uses in the Field.
Pursuant to the Collaboration Agreement, we will own all new intellectual property conceived or created out of the activities conducted under the Collaboration Agreement that specifically relate to the replicating and non-replicating technology platforms. Gilead will own all other intellectual property rights conceived or created out of the activities conducted under the Collaboration Agreement.
On February 15, 2022, we entered into an Amended and Restated Research Collaboration and License Agreement restating the Collaboration Agreement, which altered key aspects of the collaboration pertaining to the HIV therapeutic. Specifically, we assumed responsibility for advancing the HIV program through to

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the end of a Phase 1b clinical program, and Gilead retains an exclusive right, the Option, for further development thereafter. Pursuant to the Option, Gilead has the exclusive right to take back the development rights for such HIV program candidates and to further research, develop and commercialize such candidates in accordance with the terms and conditions of the Restated Collaboration Agreement. Gilead may exercise the Option at any time, but no later than 60 days after the receipt of a data package containing preclinical, clinical, chemistry and manufacturing control, regulatory and other data specified by the Restated Collaboration Agreement in return for an option exercise fee of $10.0 million.
If the Option is not exercised by Gilead during the term of the Option, or if Gilead provides written notice to us of its intention not to exercise the Option, then the terms of the Restated Collaboration Agreement will be deemed terminated with respect to the HIV Development Plan and HIV Licensed Products (each as defined in the Restated Collaboration Agreement), and the Field and rights granted under the Restated Collaboration Agreement will be limited to the HBV indication. Furthermore, if the Option expires or is terminated, the non-competition and right of first negotiation terms contained in the Restated Collaboration Agreement and summarized below will not be applicable to the development for HIV indications. In the event the Option is not exercised, we and Gilead will work in good faith to enter into a license agreement pursuant to which Gilead will grant us a milestone and/or royalty-bearing license under certain Gilead-owned intellectual property necessary or reasonably useful to allow us to research, develop, manufacture and commercialize HIV product candidates as of the date on which the Option is declined.
Financial support from Gilead to us includes a $15.0 million non-refundable initiation fee and $35.0 million equity commitment pursuant to the Stock Purchase Agreement.
Governance
The development of the programs governed by the Restated Collaboration Agreement is overseen by a six member joint steering committee, or the JSC, comprised of three representatives from each of us and Gilead. The JSC will oversee the activities carried out pursuant to the Restated Collaboration Agreement, including settling disputes arising under the Restated Collaboration Agreement, and approving a Licensed Product as being ready for development. Similarly, the Restated Collaboration Agreement establishes a four member joint development committee, or the JDC, to oversee HIV development activities.
Research on Hepatitis B Virus and HIV Products
Under the Restated Collaboration Agreement, we are responsible for manufacturing and supplying to Gilead Lymphocytic Choriomeningitis Virus and Pichinde Virus based vectors expressing one or more Hepatitis B Virus antigens to the extent necessary for both us and Gilead to carry out our respective research activities under the research plans. These research plans are largely completed and both programs have advanced to development stage.
Development and Commercialization of Products
Pursuant to the Restated Collaboration Agreement, Gilead is solely responsible for conducting the development activities, including all regulatory filings, at its expense for any product arising from the Restated Collaboration Agreement designated for development by Gilead and approved by the JSC with respect to the HBV product candidates and we are responsible for conducting development activities for the HIV product candidates through the end of a Phase 1b study. If Gilead exercises the Option for the HIV product candidates, Gilead will be solely responsible for further (post Phase 1b) development activities of the HIV product candidates. Gilead is also solely responsible, at its expense, for the manufacture and commercialization of any HBV Licensed Product developed and commercialized under the Restated Collaboration Agreement, and if the Option is exercised, it will be responsible, at its expense, for the manufacture and commercialization of any HIV Licensed Product.
Non-Compete
We may not, directly or indirectly, conduct, participate in or fund any research, development, manufacture or commercialization of, or with respect to, products utilizing arenavirus-based vectors for the treatment, cure, diagnosis or prevention of Hepatitis B Virus or HIV, except for the activities we are

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expressly permitted to perform under the Restated Collaboration Agreement. If the Option expires or is terminated, the non-competition terms contained in the Restated Collaboration Agreement shall not be applicable to the development for HIV indications.
Right of First Negotiation
Pursuant to the Restated Collaboration Agreement, in the event we offer a license or other rights to the Licensed Technology to a third party to research, develop, manufacture or commercialize a Licensed Product outside of the Field before June 4, 2028, we are required to offer Gilead a right of first negotiation for the same rights to the Licensed Technology in such field offered to the third party. If the Option expires or is terminated, the right of first negotiation terms contained in the Restated Collaboration Agreement will not be applicable to the development for HIV indications.
Financial Terms
Since the execution of the Collaboration Agreement, Gilead paid us a one-time upfront fee of $10.0 million and we received $16.2 million in milestone payments for the achievement of preclinical research milestones, including a $4.0 million milestone payment in January 2022 for the initiation of IND enabling studies for the HIV program.
Upon execution of the Restated Collaboration Agreement, we became entitled to a program initiation fee of $15.0 million. In addition, we are eligible for up to $140.0 million in developmental milestone payments for the HBV program and $50.0 million in commercialization milestone payments for the HBV program. If Gilead exercises the Option, we are eligible for up to a further $167.5 million in developmental milestone payments for the HIV program, inclusive of the $10.0 million program completion fee payable upon Option exercise, and $65.0 million in commercialization milestone payments for the HIV program. Upon the commercialization of a Licensed Product, if ever, we are eligible to receive tiered royalties of a high-single-digit to mid-teens percentage on the worldwide net sales of each HBV Licensed Product, and royalties of a mid-single-digit to 10% of worldwide net sales of each HIV Licensed Product, if the Option is exercised. The royalty payments are subject to reduction under specified conditions set forth in the Restated Collaboration Agreement. In addition, Gilead is obligated to pay us for all out-of-pocket costs actually incurred by us in connection with the HBV program, including CMO-related costs, to the extent contemplated under the research plans and research budget. In December 2019, Gilead agreed to expand the reimbursement for our resources allocated to the collaboration.
Termination
Either party may terminate the Restated Collaboration Agreement for the uncured breach of the other party and upon the other party filing for bankruptcy, reorganization, liquidation or receivership proceedings. On a program-by-program basis, at any time after the expiration or termination of the collaboration term for such program, Gilead may terminate the Restated Collaboration Agreement with respect to such program or on a product-by-product or a country-by-country basis upon prior written notice. If the Restated Collaboration Agreement is not otherwise terminated prior to the expiration of the last to expire royalty term, upon such expiration the license granted to Gilead will continue in effect, but will be fully paid-up, royalty free, perpetual and irrevocable.
Supply Agreement
In December 2020, we entered into a Clinical Supply Agreement with Gilead. Under the terms of the Clinical Supply Agreement, we will provide Gilead with drug product for use in proof-of-concept clinical trials associated with the Licensed Products designated under the Restated Collaboration Agreement. We will receive reimbursement at an agreed cost in accordance with the terms of the Restated Collaboration Agreement. Clinical supply of a potential Phase 3 clinical trial will be governed by a separate supply agreement.

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PLAN OF DISTRIBUTION
The selling stockholderWe have entered into a sales agreement with SVB Securities under which we may issue and any of its pledgees, donees, transferees, assignees or other successors-in-interest may,sell from time to time sell, transferup to an aggregate of $50,000,000 of shares of our common stock through SVB Securities, acting as sales agent or principal. Sales of the shares to which this prospectus relates, if any, will be made by any method deemed to be an “at the market offering” as defined in Rule 415 promulgated under the Securities Act. As our sales agent, SVB Securities will not engage in any transactions that stabilize our common stock.
SVB Securities will offer the shares of our common stock subject to the terms and conditions of the sales agreement on a daily basis or as otherwise disposeagreed upon by us and SVB Securities. We will designate the maximum number of anyshares or all of its sharesdollar value of common stock to be sold through SVB Securities on a daily basis or interests in shares of common stock on any stock exchange, market or trading facility on which the shares are traded or in private transactions. These dispositions may be at fixed prices, at prevailing market prices at the time of sale, at prices relatedotherwise determine such maximum number together with SVB Securities. Subject to the prevailing market price, at varying prices determined at the time of sale, or at negotiated prices. The selling stockholder may use one or moreterms and conditions of the following methods when disposing of the shares or interests therein:
•
ordinary brokerage transactions and transactions in which the broker-dealer solicits purchasers;
​
•
block trades in which the broker-dealersales agreement, SVB Securities will attemptuse its commercially reasonable efforts to sell the shares as agent but may position and resell a portion of the block as principal to facilitate the transaction;
​
•
through brokers, dealers or underwriters that may act solely as agents;
​
•
purchases by a broker-dealer as principal and resale by the broker-dealer for its account;
​
•
an exchange distribution in accordance with the rules of the applicable exchange;
​
•
privately negotiated transactions;
​
•
through the writing or settlement of options or other hedging transactions entered into after the effective date of the registration statement of which this prospectus is a part, whether through an options exchange or otherwise;
​
•
broker-dealers may agree with the selling stockholder to sell a specified number of such shares at a stipulated price per share;
​
•
a combination of any such methods of disposition; and
​
•
any other method permitted pursuant to applicable law.
​
The selling stockholder may also sell shares under Rule 144 or Rule 904 under the Securities Act, if available, or Section 4(a)(1) under the Securities Act, rather than under this prospectus.
Broker-dealers engaged by the selling stockholder may arrange for other broker-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the selling stockholder (or, if any broker-dealer acts as agent for the purchaser of shares, from the purchaser) in amounts to be negotiated. The selling stockholder does not expect these commissions and discounts to exceed what is customary in the types of transactions involved.
The selling stockholder may, from time to time, pledge or grant a security interest in some oron our behalf all of the shares of common stock owned by it and, if it defaults in the performance of its secured obligations, the pledgeesso designated or secured partiesdetermined. We may offer andinstruct SVB Securities not to sell shares of common stock from timeif the sales cannot be effected at or above the price designated by us in any such instruction. We or SVB Securities may suspend the offering of shares of common stock being made through SVB Securities under the sales agreement upon proper notice to time under this prospectus, or under a supplement or amendmentthe other party.
For its service as sales agent in connection with the sale of shares of our common stock that may be offered hereby, we will pay SVB Securities an amount equal to this prospectus under Rule 424(b)(3) or other applicable provision3.0% of the aggregate sales price received by SVB Securities Act amendingfrom each sale of shares sold through it acting as our sales agent. The remaining sales proceeds, after deducting any expenses payable by us and any transaction fees imposed by any governmental, regulatory, or self-regulatory organization in connection with the list of selling stockholders to include the pledgee, transferee or other successors in interest as selling stockholders under this prospectus.
Upon being notified in writing by the selling stockholder that any material arrangement has been entered into with a broker-dealersales, will equal our net proceeds for the sale of such shares. We have also agreed to reimburse SVB Securities for certain specified expenses, including the fees and disbursements of its legal counsel in an amount not to exceed $50,000, payable upon execution of the sales agreement, plus certain ongoing fees of its legal counsel, as provided in the sales agreement.
SVB Securities will provide written confirmation to us following the close of trading on the Nasdaq Global Select Market each day in which shares of common stock through a block trade, special offering, exchange distribution or secondary distribution or a purchaseare sold by a broker or dealer, we will file a supplement to this prospectus, if required, pursuant to Rule 424(b)it for us under the Securities Act, disclosing (i) the participating broker-dealer(s), (ii)sales agreement. Each confirmation will include the number of shares involved, (iii)sold on that day, the gross sales price per share, the compensation payable by us to SVB Securities and the proceeds to us net of such compensation.
Settlement for sales of common stock will occur, unless the parties agree otherwise, on the second business day following the date on which any sales were made in return for payment of the proceeds to us net of compensation paid by us to SVB Securities. There is no arrangement for funds to be received in an escrow, trust or similar arrangement.
We will deliver to the Nasdaq Global Select Market copies of this prospectus pursuant to the rules of the Nasdaq Global Select Market. Unless otherwise required, we will report at which suchleast quarterly the number of shares of common stock were sold (iv)through SVB Securities under the commissionssales agreement, the net proceeds to us and the compensation paid or discounts or concessions allowedby us to such broker-dealer(s), where applicable, (v) that such broker-dealer(s) did not conduct any investigation to verifySVB Securities in connection with the information set out or incorporated by reference in this prospectus, and (vi) other facts material to the transaction. In addition, upon being notified in writing by a selling stockholder that a donee or pledgee intends to sell more than 500 sharessales of common stock, we will file a supplement to this prospectus if then required in accordance with applicable securities law.

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The selling stockholder also may transfer the shares of common stock in other circumstances, in which case the transferees, pledgees or other successors in interest will be the selling beneficial owners for purposes of this prospectus.stock.
In connection with the sale of the shares of common stock the selling stockholder may enter into hedging transactions after the effective date of the registration statement of which this prospectus is a part with broker-dealers or other financial institutions, which may in turn engage in short sales of the common stock in the course of hedging the positions they assume. The selling stockholder may also sell shares of common stock short after the effective date of the registration statement of which this prospectus is a part and deliver these securities to close out its short positions, or loan or pledge the common stock to broker-dealers that in turn may sell these securities. The selling stockholder may also enter into option or other transactions after the effective date of the registration statement of which this prospectus is a part with broker-dealers or other financial institutions or the creation of one or more derivative securities which require the delivery to such broker-dealer or other financial institution of shares offered by this prospectus, which shares such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction).
The selling stockholder and any broker-dealers or agents that are involved in selling the shares mayon our behalf, SVB Securities will be deemed to be “underwriters”an “underwriter” within the meaning of the Securities Act in connection with such sales. In such event, any commissions received by such broker-dealers or agents and any profit on the resale of the shares purchased by them maycompensation paid to SVB Securities will be deemed to be underwriting commissions or discounts under the Securities Act. The maximum commission or discount to be received by any member of the Financial Industry Regulatory Authority or independent broker-dealer will not be greater than 8% of the initial gross proceeds from the sale of any security being sold.
We have advised the selling stockholder that it is required to comply with Regulation M promulgated under the Exchange Act during such time as it may be engaged in a distribution of the shares. The foregoing may affect the marketability of the common stock.
The aggregate proceeds to the selling stockholder from the sale of the common stock offered by it will be the purchase price of the common stock less discounts or commissions, if any. The selling stockholder reserves the right to accept and, together with its agents from time to time, to reject, in whole or in part, any proposed purchase of common stock to be made directly or through agents. We will not receive any of the proceeds from this offering.
We are required to pay all fees and expenses incident to the registration of the shares.discounts. We have agreed in the sales agreement to indemnify the selling stockholderprovide indemnification and contribution to SVB Securities against certain losses, claims, damages andcivil liabilities, including liabilities under the Securities Act Act.
In the ordinary course of their business, SVB Securities and/or otherwise.its affiliates may perform, investment banking, broker dealer, lending, financial advisory or other services for us for which they have received, or may receive, separate fees.
We have agreed withestimate that the selling stockholdertotal expenses of the offering payable by us, excluding discounts and commissions payable to keepSVB Securities under the registration statementsales agreement, will be approximately $0.7 million.
The offering of which this prospectus constitutes a part effective untilcommon stock pursuant to the sales agreement will terminate upon the earlier of (i) such time as(1) the sale of all of the Registrable Securities (as definedour shares of common stock provided for in the Registration Rights Agreement) coveredsales agreement or (2) the termination of the sales agreement, pursuant to its terms, by such registration statement have been publicly sold by the selling stockholder and (ii) the date on which the selling stockholder ceases to hold Registrable Securities.either SVB Securities or us.
 
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LEGAL MATTERS
The validity of the common stock being offered by this prospectus has beenwill be passed upon for us by Goodwin Procter LLP.LLP, Boston, Massachusetts. SVB Securities LLC is being represented in connection with this offering by Duane Morris LLP, New York, New York.
EXPERTS
The financial statements incorporated in this prospectus by reference to the Annual Report on Form 10-K for the year ended December 31, 2021 have been so incorporated in reliance on the report (which contains an emphasis of matter paragraph relating to the Company’s requirement for additional financing to fund future operations as described in Note 2 to the financial statements) of PwC Wirtschaftsprufung GmbH, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting. PwC Wirtschaftsprufung GmbH is a member of the Austrian Chamber of Tax Advisors and Public Accountants (Kammer der Steuerberater und Wirtschaftsprufer).

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WHERE YOU CAN FIND MORE INFORMATION; INCORPORATION BY REFERENCEINFORMATION
Available InformationThis prospectus is part of a registration statement we filed with the SEC. This prospectus does not contain all of the information set forth in the registration statement and the exhibits to the registration statement. For further information with respect to us and the securities we are offering under this prospectus, we refer you to the registration statement and the exhibits and schedules filed as a part of the registration statement. You should rely only on the information contained in this prospectus or incorporated by reference. We have not authorized anyone else to provide you with different information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume that the information in this prospectus is accurate as of any date other than the date on the front page of this prospectus, regardless of the time of delivery of this prospectus or any sale of the securities offered by this prospectus.
We file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains a website that contains reports, proxy and information statements and other information aboutregarding issuers such as us, whothat file electronically with the SEC.SEC, including HOOKIPA Pharma Inc. The address of thatthe SEC website is www.sec.gov.www.sec.gov.
OurWe maintain a website address isat www.hookipapharma.com. The informationInformation contained on, or that can be accessed through, our website however, is not and should not be deemed to be, a part of this prospectus.
This prospectus and any prospectus supplement are part of a registration statement that we filed with the SEC and do not contain all of the information in the registration statement. The full registration statement may be obtained from the SEC or us, as provided below. Other documents establishing the terms of the offered securities are or may be filed as exhibits to the registration statement or documents incorporated by reference in the registration statement. Statements ininto this prospectus and, therefore, is not part of this prospectus or any accompanying prospectus supplement about these documents are summaries and each statement is qualified in all respectssupplement.

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INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
The SEC allows us to incorporate by reference to the document to which it refers. You should refer to the actual documents for a more complete descriptionmuch of the relevant matters. You may inspect a copy ofinformation we file with the registration statement through the SEC’s website, as provided above.
Incorporation by Reference
The SEC’s rules allow us to “incorporate by reference” information into this prospectus,SEC, which means that we can disclose important information to you by referring you to another document filed separately with the SEC.those publicly available documents. The information incorporatedthat we incorporate by reference in this prospectus is deemedconsidered to be part of this prospectus, and subsequent information thatprospectus.
Because we fileare incorporating by reference future filings with the SEC, will automatically updatethis prospectus is continually updated and those future filings may modify or supersede some of the information included or incorporated in this prospectus. This means that information. Any statement containedyou must look at all of the SEC filings that we incorporate by reference to determine if any of the statements in this prospectus or ain any document previously filed document incorporated by reference will be deemed to behave been modified or superseded for purposes of this prospectus to the extent that a statement contained in this prospectus or a subsequently filed document incorporated by reference modifies or replaces that statement.
superseded. This prospectus and any accompanying prospectus supplement incorporateincorporates by reference the documents set forthlisted below that have previously been filedand any future filings we make with the SEC:SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (in each case, other than those documents or the portions of those documents not deemed to be filed) between the date of the initial registration statement and the effectiveness of the registration statement and following the effectiveness of the registration statement until the offering of the securities under the registration statement is terminated or completed:
•
Our our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 filed with the SEC on March 24, 2022, and as amended by our Amendment to our Annual Report on Form 10-K/A filed with the SEC on May 2, 2022;
​
•
our Definitive Proxy Statement filed with the SEC on May 16, 2022, to the extent the information therein is filed and not furnished;
​
•
Ourour Quarterly Report on Form 10-Q for the quarter ended March 31, 2022 filed with the SEC on May 16, 2022;
​
•
Ourour Current Reports on Form 8-K and Form 8-K/A filed with the SEC on February 1, 2022, February 15, 2022 (as amended by the Current Report on Form 8-K/A filed on, March 1, 2022), March 1, 2022(both filings), March 3, 2022, April 20, 2022, May 2, 2022, June 6, 2022, June 22,22, 2022, and July 1, 2022; and
​
•
Thethe description of our common stock contained in our Registration Statement on Form 8-A filed with the SEC on April 15, 2019,, and any further amendment or report filed with the SEChereafter for the purpose of updating such description pursuant to Section 12(b) of the description.Exchange Act.
​
These documents mayWe also be accessed on our website at www.hookipapharma.com. Except as otherwise specifically incorporatedincorporate by reference ininto this prospectus information contained in,all documents (other than current reports furnished under Item 2.02 or accessible through, our website is not a partItem 7.01 of this prospectus.
All reportsForm 8-K and other documents we subsequently fileexhibits filed on such form that are related to such items) that are filed by us with the SEC pursuant to SectionSections 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the termination of this offering, including all such documents we may file with the SEC(i) after the date of the initial filing of the registration statement of which this prospectus forms a part and prior to the effectiveness of the registration statement, and (ii) after the date of this prospectus but excludingprior to the termination of the offering. These documents include, without limitation, Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, as well as proxy statements.
We will provide to each person, including any beneficial owner, to whom a prospectus is delivered, without charge upon written or oral request, a copy of any or all of the information furnished to, rather than filed with, the SEC, will also bethat has been incorporated by reference into this prospectus and deemed to be part of thisbut not delivered with the prospectus, from the date of the filing of such reports and documents.

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You may request a free copy of any of the documentsincluding exhibits that are specifically incorporated by reference in this prospectus by writing or telephoning us at the following address:into such documents. You should direct any requests for such information to:
HOOKIPA Pharma Inc.
350 Fifth Avenue, 72nd Floor, Suite 7240
New York, New York 10118
+43 1 890 63 60
Exhibits to the filings will not be sent, however, unless those exhibits have specifically been incorporated by reference in this prospectus or any accompanying prospectus supplement.
 
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Up to $50,000,000
[MISSING IMAGE: lg_hookipapharma-4c.jpg]
Common Stock
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PROSPECTUS
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SVB Securities
           , 2022
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PART II
INFORMATION NOT REQUIRED IN THE PROSPECTUS
Item 14.   Other Expenses of Issuance and Distribution
The following is an estimate oftable sets forth the estimated costs and expenses, (all of which are to be paidother than underwriting discounts and commissions, payable by the registrant) that we may incurus in connection with the offering of the securities being registered hereby.registered. All the amounts shown are estimates, except for the SEC registration fee and FINRA filing fee.
​SEC registration fee​​$249.52​​SEC registration fee​​$14,455.08​​
​Legal fees and expenses​​​75,000.00​​FINRA filing fee​​​30,500​​
​
Accounting fees and expenses(1)
​​​26,022.50​​Accounting fees and expenses​
(1)​
​
​Printing and miscellaneous expenses​​​7,500.00​​Legal fees and expenses​
(1)​
​
​Total​​$108,772.02​​Transfer agent fees and expenses​
(1)​
​
​Trustee fees and expenses​
(1)​
​
​Printing and miscellaneous expenses​
(1)​
​
​Total​
$   (1)    
​
​
(1)
The AccountingThese fees and expenses incurred by PwC Wirtschaftsprüfung GmbH in connection with the securities being registered hereby have been converted to USD at exchange rate valid on July 1, 2022,are calculated based on the exchange rate published bysecurities offered and the Federal Reserve Bank.number of issuances and, accordingly, cannot be estimated at this time.
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Item 15.   Indemnification of DirectorsOfficers and OfficersDirectors
Subsection (a) of Section 145 of the Delaware General Corporation Law, of the State of Delaware, or the DGCL, empowersauthorizes a corporation to indemnify any person who wasits directors and officers against liabilities arising out of actions, suits and proceedings to which they are made or is a party or who is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person isthey have served or was a director, officer, employee or agent of the corporation, or is or wasare currently serving at the request of the corporation as a director or officer employee or agent of another corporation, partnership, joint venture, trust or other enterprise, againstto a corporation. The indemnity may cover expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the persondirector or officer in connection with any such action, suit or proceeding if the persondirector or officer acted in good faith and in a manner the persondirector or officer reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person’sdirector or officer’s conduct was unlawful.
Subsection (b) of Section 145 empowers a corporationpermits corporations to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person acted in any of the capacities set forth above, againstpay expenses (including attorneys’ fees) actually and reasonably incurred by directors and officers in advance of the person in connection with the defense or settlementfinal disposition of such action or suit if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation, except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or such other court shall deem proper.
Section 145 further provides that to the extent a director or officer of a corporation has been successful on the merits or otherwise in the defense of any action, suit or proceeding referredupon receipt of an undertaking by or on behalf of such director or officer to repay such amount if it shall ultimately be determined that such director or officer is not entitled to be indemnified by the corporation as authorized in subsections (a) and (b) ofSection 145. In addition, Section 145 or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys’ fees) actually and reasonably incurred by such person in connection therewith;provides that indemnification provided for by Section 145 shall not be deemed exclusive of any other rights to whicha corporation has the indemnified party may be entitled; and the indemnification provided for by Section 145 shall, unless otherwise provided when authorized or ratified, continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of such person’s heirs, executors and administrators. Section 145 also empowers the corporationpower to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture,

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trust or other enterpriseits directors and officers against any liability asserted against such personthem and incurred by such personthem in any suchtheir capacity as a director or officer, or arising out of histheir status as such, whether or not the corporation would have the power to indemnify such personthe director or officer against such liabilitiesliability under Section 145.
Section 102(b)(7) of the DGCL provides that a corporation’sWe have adopted provisions in both our certificate of incorporation may contain a provision eliminatingand bylaws that limit or limitingeliminate the personal liability of our directors to the fullest extent permitted by the DGCL, as it now exists or may in the future be amended. Consequently, a director is not personally liable to the corporationus or itsour stockholders for monetary damages foror breach of fiduciary duty as a director, provided that such provision shall not eliminate or limit theexcept for liability of a director (i) for for:
•
any breach of the director’s duty of loyalty to the corporationus or its stockholders, (ii) for actsour stockholders;
​
•
any act or omissionsomission not in good faith or which involvethat involves intentional misconduct or a knowing violation of law, (iii) under Section 174 of the DGCL,law;
​
•
any unlawful payments related to dividends or (iv) for unlawful stock purchases, redemptions or other distributions; or
​
•
any transaction from which the director derived an improper personal benefit.
Our restated certificate​
These limitations of incorporation provides thatliability do not alter director liability under the federal securities laws and do not affect the availability of equitable remedies such as an injunction or rescission.

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In addition, our bylaws provide that:
•
we will indemnify our directors, officers and, in the discretion of our board of directors, certain employees to the fullest extent permitted by the DGCL, none of our directors shallas it now exists or may in the future be liableamended; and
​
•
we will advance reasonable expenses, including attorneys’ fees, to our company or our stockholders for monetary damages arising from a breach of fiduciary duty owed to our company or our stockholders. In addition, our amended and restated bylaws provide that we must indemnify our directors and, in the discretion of our board of directors, to our officers and certain employees, in connection with legal proceedings relating to the fullest extent authorized by the DGCL and must also pay expenses incurred in defending any such proceeding in advance of its final disposition upon delivery of an undertaking, bytheir service for or on behalf of an indemnified person,us, subject to repay all amounts so advanced if it should be determined ultimately that such person is not entitled to be indemnified under this section or otherwise.limited exceptions.
​
We have entered into indemnification agreements with each of our directors and executive officers. These agreements provide that we will indemnify each of our directors, certain of our executive officers in which we have agreed to indemnify, defend and, hold harmless, and also advance expenses as incurred,at times, their affiliates to the fullest extent permitted under applicable law, from damage arising from the fact that such person is or was anby Delaware law. We will advance expenses, including attorneys’ fees (but excluding judgments, fines and settlement amounts), to each indemnified director, executive officer or director of our company or our subsidiaries.
Theaffiliate in connection with any proceeding in which indemnification rights set forth above shall not be exclusive of any other right which an indemnified person may have or hereafter acquire under any statute, our restated certificate of incorporation, our amendedis available and restated bylaws, any agreement, any vote of stockholders or disinterested directors or otherwise.
We expect to maintain standard policies of insurance that provide coverage (1) towe will indemnify our directors and officers against lossfor any action or proceeding arising from claims made by reasonout of breach of duty or other wrongful act and (2) to us with respect to indemnification payments that we may make to such directors and officers.
We have purchased and intend to maintain insurance on behalf of HOOKIPA and any person who is or wasperson’s services as a director or officer againstbrought on behalf of us or in furtherance of our rights. Additionally, certain of our directors or officers may have certain rights to indemnification, advancement of expenses or insurance provided by their affiliates or other third parties, which indemnification relates to and might apply to the same proceedings arising out of such director’s or officer’s services as a director referenced herein. Nonetheless, we have agreed in the indemnification agreements that our obligations to those same directors or officers are primary and any loss arising from any claim asserted against himobligation of such affiliates or her andother third parties to advance expenses or to provide indemnification for the expenses or liabilities incurred by himthose directors are secondary.
We also maintain general liability insurance which covers certain liabilities of our directors and officers arising out of claims based on acts or heromissions in that capacity, subject to certain exclusions and limits oftheir capacities as directors or officers, including liabilities under the amount of coverage.Securities Act.
Item 16.   Exhibits and Financial Statement Schedules
​
Exhibit
Number
​​Description​
​1.1*​​Form of Underwriting Agreement​
​1.2​​
Sales Agreement, dated as of July 12, 2022, by and between the Company and SVB Securities LLC
​
​3.1​​Amended and Restated Certificate of Incorporation of HOOKIPA Pharma Inc., dated April 23, 2019 (incorporated by reference tothe Company (filed as Exhibit 3.1 ofto the Company’s Annual Report on Form 10-K (File No. 001-38869), filed with the SEC on March 24, 2022).2022 (File No. 001-38869) and incorporated herein by reference)​
​3.2​​Certificate of Amendment of Amended and Restated Certificate of Incorporation of HOOKIPA Pharma Inc.the Company (filed as Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on July 1, 2022 (File No. 001-38869) and incorporated herein by reference)​
​3.3​​Amended and Restated Bylaws of HOOKIPA Pharma Inc. (incorporated by reference tothe Company (filed as Exhibit 3.2 ofto the Company’s Current Report on Form 8-K (File No. 001-38869), filed with the SEC on April 23, 2019).2019 (File No. 001-38869) and incorporated herein by reference)​
​4.1​​Form of Specimen Certificate Representing Common Stock (incorporated by reference toCertificate (filed as Exhibit 4.1 ofto the Company’s Registration Statement on Form S-1 (Reg. No. 333-230451), filed with the SEC on April 8, 2019).2019 (File No. 333-230451) and incorporated herein by reference)​
​4.2​​
Stock Purchase Agreement, dated February 15, 2022, byForm of indenture for subordinated debt securities and among HOOKIPA Pharma Inc.the related form of subordinated debt security
​
​4.3​​
Form of indenture for senior debt securities and Gilead Sciences, Inc. (incorporated by reference to Exhibit 10.1the related form of the Current Report on senior debt security
​
​4.4*​​Form 8-K (File No. 001-38869), filed with the SEC on February 15, 2022).of Certificate of Designations​
​4.5*​​Form of Warrant Agreement​
​4.6*​​Form of Unit Certificate​
​4.7*​​Form of Unit Agreement​
 
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​
Exhibit
Number
​​Description​
4.3​4.8*​​Form of Preferred Stock Certificate​
​4.9​​Registration RightsShareholders Agreement dated June 17, 2022, by and among HOOKIPA Pharma Inc. and Gilead Sciences, Inc. (incorporated by referencecertain of its shareholders, dated February 15, 2019 (filed as Exhibit 4.1 to Exhibit 10.1 of the Company’s Current Report on Form 8-K filed on April 23, 2019 (File No. 001-38869), filed with the SEC on June 22, 2022). and incorporated herein by reference)​
​5.1*​​
Opinion of Goodwin Procter LLP.LLP
​
23.1*​5.2​​
Opinion of Goodwin Procter LLP relating to the sales agreement prospectus
​
​23.1​​Consent of PwC Wirtschaftsprüfung GmbH, Independent Registered Public Accounting Firm​
​23.2​​
Consent of Goodwin Procter LLP (included in Exhibit 5.1).5.1 hereto)
​
23.2*​23.3​​
Consent of PwC Wirtschaftsprüfung GmbH, independent registered public accounting firm.Goodwin Procter LLP (included in Exhibit 5.2 hereto)
​
24.1*​24.1​​
PowersPower of Attorney (incorporated by reference to(included on the signature page hereto).pages to this registration statement)
​
 107*​25.1**​​Form T-1 Statement of Eligibility of Trustee for Senior Indenture under the Trust Indenture Act of 1939​
​25.2**​​Form T-1 Statement of Eligibility of Trustee for Subordinated Indenture under the Trust Indenture Act of 1939​
​107​​
Filing Fee Table
​
​
*
Filed herewith.To be filed, if necessary, by amendment or as an exhibit to a document to be incorporated or deemed to be incorporated by reference in this registration statement, including a Current Report on Form 8-K.
​
**
To be filed pursuant to Section 305(b)(2) of the Trust Indenture Act of 1939.
​
Item 17.   Undertakings
(a)   The undersigned registrant hereby undertakes:
(1)   To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:
(i)   To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933, as amended, or the Securities Act;
(ii)   To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in the volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Securities and Exchange CommissionSEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and
(iii)   To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;
provided, , however, that the undertakings set forth in paragraphs (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) aboveof this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Securities and Exchange CommissionSEC by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934, as amended, or the Securities Exchange Act, that are incorporated by reference in this registration statement or isare contained in a form of prospectus filed pursuant to Rule 424(b) that is a part of thethis registration statement.
(2)   That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

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(3)   To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.
(4)   That, for the purpose of determining liability under the Securities Act to any purchaser:
(A)(i)   Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

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(B)   Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided,thereof; provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.
(b)   The(5)   That, for the purpose of determining liability of the registrant under the Securities Act to any purchaser in the initial distribution of the securities, the undersigned registrant hereby undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:
(i)   any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;
(ii)   any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;
(iii)   the portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and
(iv)   any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.
(6)   That, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to sectionSection 15(d) of the Securities Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
(c)   (7)   To file an application for the purpose of determining the eligibility of the trustee to act under subsection (a) of Section 310 of the Trust Indenture Act in accordance with the rules and regulations prescribed by the SEC under Section 305(b)(2) of the Trust Indenture Act.
Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the

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registrant has been advised that in the opinion of the Securities and Exchange CommissionSEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.
 
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SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, State of New York, on July 11,12, 2022.
HOOKIPA PHARMA INC.
By:
/s/ Joern Aldag
​
​
Joern Aldag
Chief Executive Officer (Principal Executive Officer)
POWER OF ATTORNEYPower of Attorney and Signatures
We, the undersigned directorsEach individual whose signature appears below hereby constitutes and officersappoints each of HOOKIPA Pharma Inc. (the “Company”), hereby severally constitute and appoint Joern Aldag, and Reinhard Kandera and each of them singly, ourDaniel Courtney as such person’s true and lawful attorneys,attorney-in-fact and agent with full power to them,of substitution and to each of them singly,resubstitution, for such person in such person’s name, place and stead, in any and all capacities, to sign for us and in our names in the capacities indicated below, any and all amendments including(including post-effective amendments andamendments) to this Registration Statement (or any registration statementRegistration Statement for the same offering that is to be effective underupon filing pursuant to Rule 462(b) ofunder the Securities Act of 1933), and to this registration statement,file the same, with all exhibits thereto, and all documents in connection therewith, with the Securities and Exchange Commission granting unto each said attorneys,attorney-in-fact and each of them,agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith,and about the premises, as fully to all intents and purposes as each of ussuch person might or could do in person, and hereby ratifying and confirming all that any said attorneys,attorney-in-fact and each of them,agent, or theirany substitute or substitutes shallof any of them, may lawfully do or cause to be done by virtue of this Power of Attorney.hereof.
Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statementRegistration Statement and Power of Attorney has been signed below by the following persons on behalf of the registrantperson in the capacities and on the datesdate indicated.
​SIGNATURESignature​​TITLETitle(s)​​DATEDate​
​
/s/ Joern Aldag
​
Joern Aldag
​​
Chief Executive Officer and Director
(Principal Executive Officer)
​​July 11,12, 2022​
​
/s/ Reinhard Kandera
​
Reinhard Kandera
​​
Chief Financial Officer and Director
(Principal Financial and Accounting Officer)
​​July 11,12, 2022​
​
/s/ Jan van de Winkel Ph.D.
​
Jan van de Winkel, Ph.D.
​​Chairman of the Board​​July 11,12, 2022​
​
/s/ Michael A. Kelly
​
Michael A. Kelly
​​Director​​July 11,12, 2022​
​
/s/ David Kaufman
​
David Kaufman, M.D., Ph.D.
​​Director​​July 11,12, 2022​
​
/s/ Julie O’Neill
​
Julie O’Neill
​​Director​​July 11,12, 2022​
​
/s/ Timothy Reilly Ph.D.
​
Timothy Reilly, Ph.D.
​​Director​​July 11,12, 2022​
 
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