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(Exact name of Registrant as specified in its charter)

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

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

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

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

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☒

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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. (Check one):

If an emerging growth company, indicate by check mark if the registrant had elected not to use the extended transition period for complying with any new or revised financial accounting standards provide pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.     ☒

If securities are registered pursuant to Section 12(b) of the Exchange Act, indicate by check mark whether the financial

statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

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

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

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the Registrant (based on the last reported sale price of Registrants common stock on June 30, 2023 on the Nasdaq Global Select Market) was approximately $699,000,000.

As of February 23, 2024, there were 139,953,143 shares of the Registrant’s common stock outstanding.

Documents incorporated by reference: Portions of the Registrant’s Definitive Proxy Statement to be filed no later than 120 days after the fiscal year ended December 31, 2023 in connection with the Registrant’s 2024 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent indicated herein.

All references in this Annual Report on Form 10-K to “Novavax,” the “Company,” “we,” “us,” and “our” refer to Novavax, Inc. including its wholly-owned subsidiaries (unless the context otherwise indicates). All references in this Annual Report on Form 10-K to "NVX-CoV2373,” or “prototype vaccine” refer to our Nuvaxovid™ prototype COVID-19 vaccine, and all references to “NVX-CoV2601,” or “updated vaccine” refer to our Nuvaxovid™ updated COVID-19 vaccine. We refer to our prototype vaccine and updated vaccine, collectively, as our “COVID-19 Vaccine”. Local regulatory authorities have also specified nomenclature for the prototype and updated vaccines for labeling within their territories (e.g., “Novavax COVID-19 Vaccine, Adjuvanted” and “Novavax COVID-19, Adjuvanted (2023-2024 Formula),” respectively, for the U.S.). The Company’s partner, Serum Institute of India Pvt. Ltd., markets NVX-CoV2373 as “Covovax™.”

Novavax™, Nuvaxovid™, Matrix-M™, Matrix™, Prepare™, Resolve™, and ResVax™ are trademarks of Novavax. Any other trademarks referred to in this Annual Report on Form 10-K are the property of their owners. All rights reserved. We do not intend our use or display of other companies’ trade names or trademarks to imply an endorsement or sponsorship of us by such companies, or any relationship with any of these companies.

This Annual Report on Form 10-K contains forward-looking statements that involve risks and uncertainties. As a result of many factors, such as those set forth under “Risk Factors” and elsewhere in this Annual Report on Form 10-K, our actual results may differ materially from those anticipated in these forward-looking statements. Please also see the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Our business is subject to numerous risks which are discussed more fully under the heading “Risk Factors” in this Annual Report on Form 10-K. These risks include, but are not limited to, the following:

•We have a history of losses and our future profitability is uncertain.

•We will continue to require significant funding to maintain our current level of operations and fund the further development of our vaccine candidates.

•Because our vaccine product development efforts depend on new and rapidly evolving technologies, we cannot be certain that our efforts will be successful.

•The regulatory and commercial success of our COVID-19 Vaccine remains uncertain. While we have received full marketing authorization provisional registration, conditional marketing authorization (“CMA”), or emergency use authorization (“EUA”) for our prototype COVID-19 Vaccine and our updated COVID-19 vaccine in a number of jurisdictions, we may be unable to obtain full regulatory approvals in the United States (“U.S.”) or other jurisdictions for our updated vaccine or new versions in the future, or produce a successful vaccine in a timely manner, if at all.

•The emergence and transmissibility of variants of the SARS-CoV-2 virus, and the demand for bivalent vaccines, may affect market acceptance or sales of our COVID-19 Vaccine, and our strategy to develop new versions of our COVID-19 Vaccine to protect against certain variants may not be successful.

•We are a biotechnology company and face significant risk in developing, manufacturing, and commercializing our products and product candidates.

•Because we depend on third parties to conduct some of our laboratory testing and clinical trials, and a significant amount of our vaccine manufacturing and distribution, we may encounter delays in or lose some control over our efforts to develop and supply products and product candidates.

•We are highly dependent on the commercial success of our COVID-19 Vaccine, and even though we have received provisional registration, CMA, or EUA or full marketing authorization in certain jurisdictions for our COVID-19 Vaccine, and even if we have products licensed in additional markets, our vaccine products may not be initially or ever profitable.

•The risks associated with COVID-19 and related governmental public health policies continue to evolve, which may have unpredictable effects on the prospects for commercial success of our COVID-19 commercial program.

•Many of our competitors have significantly greater resources and experience, which may negatively impact our commercial opportunities and those of our current and future licensees.

•There is significant competition in the development of a vaccine against COVID-19 and a combined vaccine against COVID-19 and influenza, and we may never see returns on the significant resources we are devoting to our vaccine candidates.

•We may not succeed in obtaining full U.S. Food and Drug Administration (“U.S. FDA”) licensure or foreign regulatory approvals necessary to sell our vaccine candidates.

•Our product candidates might fail to meet their primary endpoints in clinical trials, meaning that we will not have the clinical data required to support full regulatory approvals.

•The regulatory pathway for our COVID-19 Vaccine is continually evolving, and such evolution may result in unexpected or unforeseen challenges.

•We have conducted, are conducting, and plan to conduct in the future, a number of clinical trials for our COVID-19 Vaccine at sites outside the U.S. and the U.S. FDA may not accept data from trials conducted in such locations.

•The later discovery of previously unknown problems with a product, manufacturer, or facility may result in restrictions, including withdrawal of a vaccine that had previously received regulatory approval in certain jurisdictions from the market.

•Our success depends on our ability to maintain the proprietary nature of our technology.

•Our business may be adversely affected if we do not successfully execute our business development initiatives.

•Given our current cash position and cash flow forecast, and significant uncertainties related to 2024 revenue, substantial doubt exists regarding our ability to continue as a going concern through one year from the date that the financial statements included in this Annual Report were issued.

•Servicing our 5.00% convertible senior unsecured notes due 2027 (the “Notes”) requires a significant amount of cash, and we may not have sufficient cash flow resources to pay our debt.

•Because our stock price has been and will likely continue to be highly volatile, the market price of our common stock may be lower or more volatile than expected.

•Litigation could have a material adverse impact on our results of operation and financial condition.

•We or the third parties upon whom we depend may be adversely affected by natural or man-made disasters or public health emergencies, such as the COVID-19 pandemic.

Novavax, Inc., together with our wholly owned subsidiaries, is a biotechnology company that promotes improved global health through the discovery, development, and commercialization of innovative vaccines to prevent serious infectious diseases. Our proprietary recombinant technology platform harnesses the power and speed of genetic engineering to efficiently produce highly immunogenic nanoparticle vaccines designed to address urgent global health needs.

Our vaccine candidates are nanostructures of conformationally correct recombinant proteins that mimic those found on pathogens. This technology enables the immune system to recognize target proteins and develop protective immune responses. We believe that our vaccine technology may lead to the induction of a differentiated immune response that may be more efficacious than naturally occurring immunity or other vaccine approaches. Our vaccine candidates also incorporate our proprietary saponin-based Matrix-M™ adjuvant to enhance the immune response, stimulate higher levels of functional antibodies, and induce a cellular immune response.

We have developed an updated COVID-19 vaccine for the 2023-2024 vaccination season. In October 2023, the U.S. FDA granted EUA for our updated vaccine for active immunization to prevent COVID-19. The updated vaccine is authorized as (1) a single dose in individuals 12 years and older who have been vaccinated with any COVID-19 vaccine at least 2 months after receipt of the last previous dose of COVID-19 vaccine, and (2) a series of 2 doses administered 3 weeks apart to individuals 12 years and older who were not previously vaccinated with any COVID-19 vaccine. Our updated vaccine is available within the U.S. at many major pharmacy retailers. Outside the U.S. for our updated vaccine, in January 2024, we were granted marketing authorization by the United Kingdom’s (“UK”) Medicines and Healthcare Products Regulatory Agency (“MHRA”), in December 2023, we were granted expanded authorization by Health Canada, and in October 2023, we were granted approval by the European Commission (“EC”). We are committed to supplying of our key target markets through advance purchase agreements (“APAs”) covering such markets. We continue to work closely with regulatory authorities in many jurisdictions for authorization of our updated vaccine. We previously developed a prototype COVID-19 vaccine, which has received full marketing authorization (“MA”), marketing approval, interim authorization, provisional approval, CMA, from multiple regulatory authorities in over 40 countries globally. We continue to progress our regulatory authorizations for our prototype vaccine in select territories, as we believe these may facilitate authorization of our vaccine candidates for updated strains in the future.

Additionally, we are developing a COVID-19 Influenza Combination (“CIC”) vaccine candidate. Our other areas of focus include providing Matrix-M™ adjuvant for collaborations, including in R21/Matrix-M™ adjuvant malaria vaccine, which in December 2023 received prequalification from the World Health Organization (“WHO”) and previously received authorization in several countries, as well as other preclinical vaccine research with our Matrix-M™ adjuvant, including through a partnership with the Bill & Melinda Gates Medical Research Institute.

We were incorporated in 1987 under the laws of the State of Delaware. Our principal executive offices are located at 700 Quince Orchard Road, Gaithersburg, Maryland, 20878, and our telephone number is (240) 268-2000. Our common stock is listed on the Nasdaq Global Select Market under the symbol “NVAX.”

We believe our recombinant nanoparticle vaccine technology, together with our proprietary Matrix-M™ adjuvant, is well suited for the development and commercialization of vaccine candidates targeting a broad scope of respiratory and other endemic and emerging infectious diseases at scale.

Once a target of interest has been identified, the genetic sequence encoding the antigen is selected for developing the vaccine construct. The genetic sequence may be optimized to enhance protein stability or confer resistance to degradation. This genetic construct is inserted into the baculovirus Spodoptera frugiperda (“Sf-/BV”) insect cell-expression system, which enables efficient, large-scale expression of the optimized protein. The Sf-/BV system produces protein-based antigens that are properly folded and modified—which can be critical for functional, protective immunity. Protein antigens are purified and organized around a polysorbate-based nanoparticle core in a configuration that resembles their native presentation. This results in a highly immunogenic nanoparticle that is ready to be formulated with Matrix-M™ adjuvant.

Our proprietary Matrix-M™ adjuvant has been a key differentiator within our platform. This adjuvant has enabled potent, well-tolerated, and durable efficacy by stimulating the entry of antigen presenting cells (“APCs”) into the injection site and enhancing antigen presentation in local lymph nodes. This in turn activates APCs, T-cell and B-cell populations, and plasma cells, which promotes the production of high-affinity antibodies. This potent mechanism of action enables a lower dose of antigen to achieve the desired immune response, thereby contributing to increased vaccine supply and manufacturing capacity. These immune-boosting and dose-sparing capabilities contribute to the adjuvant’s highly unique profile.

We continue to evaluate commercial opportunities for the use of our Matrix-M™ adjuvant alongside vaccine antigens produced by other manufacturers. Matrix-M™ adjuvant is being evaluated in combination with several partner-led malaria vaccine candidates, including the R21/Matrix-M™ adjuvant malaria vaccine created by the Jenner Institute, University of Oxford. The R21/Matrix-M™ adjuvant vaccine has been licensed to Serum Institute of India Pvt. Ltd. (“SIIPL”) for commercialization and in December 2023 received prequalification by the WHO, along with authorizations received earlier in the year in Burkino Faso, Ghana, and Nigeria. Additionally, in May 2023, we entered into a 3-year agreement with the Bill & Melinda Gates Medical Research Institute to provide our Matrix-M™ adjuvant for use in preclinical vaccine research. In June 2023, we signed a material transfer agreement with SK bioscience Co., Ltd. (“SK”) for use of our Matrix-M™ adjuvant in preclinical vaccine experiments for shingles, influenza, and pan-sarbecovirus vaccine. Our adjuvant technology is also being used by commercial partners as a key component in veterinary vaccines against equine influenza and Strangles, as well as the manufacture of black-widow anti-venom.

We have received full authorizations in select territories for our prototype vaccine developed for the 2022-2023 COVID-19 vaccination season and continue to receive authorizations for our updated vaccine developed for the 2023-2024 COVID-19 vaccination season in accordance with the updated strain protocol guidance. We continue to progress our regulatory authorizations for our prototype vaccine in select territories, as we believe these may facilitate authorization of our vaccine candidates for updated strains in the future. Additionally, we progress our regulatory authorizations for our updated vaccine and plan to continue to do so for subsequent future variant strains for each annual respiratory season.

Within the U.S. market, our updated vaccine received EUA in October 2023 from the U.S. FDA to prevent COVID-19 in individuals aged 12 and older. Our updated vaccine is marketed in the U.S. under the name Novavax COVID-19 Vaccine, Adjuvanted (2023-2024 Formula). The formulation for our updated vaccine aligns with global harmonized guidance from the U.S. FDA, the European Medicines Agency (“EMA”), and WHO recommendations for the 2023-2024 vaccination season. In September 2023, the U.S. Centers for Disease Control and Prevention (“CDC”) Advisory Committee on Immunization Practices (“ACIP”) voted in favor of a recommendation for the use of 2023-2024 monovalent XBB containing COVID-19 vaccines authorized under EUA or approved by Biologics License Application (“BLA”) in individuals 6 months and older, which was adopted by the CDC Director. The U.S. FDA’s grant of EUA and CDC’s September 2023 recommendation makes our updated vaccine the only protein-based non-mRNA COVID-19 vaccine available in the U.S.

Outside of the U.S. market, we continue to progress regulatory authorizations for our updated vaccine globally. We highlight as follows our fourth quarter 2023 and subsequent authorizations received through the date of filing this Annual Report on Form 10-K.

In January 2024, we were granted marketing authorization by the UK MHRA for our updated vaccine, marketed under the name Nuvaxovid™ XBB.1.5 Vaccine, in individuals aged 12 and older.

In December 2023, we were granted expanded authorization by Health Canada and EUA by the Taiwan Food and Drug Administration for our updated vaccine, marketed under the name Nuvaxovid™ XBB.1.5 Vaccine, in individuals aged 12 and older.

In November 2023, our updated vaccine received EUA in South Korea where SK bioscience has exclusive commercial rights to our updated vaccine. Additionally, in November 2023, we were granted emergency use license (“EUL”) by the WHO for our updated vaccine, marketed under the name Nuvaxovid™ XBB.1.5 Vaccine, in individuals aged 12 and older. The EUL assists WHO member states in assessing vaccines with the aim of expediting availability and enables the WHO’s 194 member states to expedite regulatory approvals to import and administer the vaccine.

In October 2023, we were granted approval by the EC for our updated vaccine in individuals aged 12 and older, which followed the positive opinion for approval from the Committee for Medicinal Products for Human Use of the EMA. We expect to deliver doses to European countries pursuant to existing APAs.

We have previously received authorizations for our prototype COVID-19 vaccine in over 40 countries globally including from major regulatory agencies such as the U.S. FDA, WHO, EMA, and MHRA. To date, we have received full MA, approval, interim authorization, provisional approval, CMA, and EUA for the adult population, aged 18 and older, the adolescent population, aged 12 to 17 years, and the pediatric population, aged 7 to 11 years in select territories. The regulatory authorizations for our prototype vaccine include primary series and both homologous and heterologous booster indications within specific countries. For the territories in which our vaccine has received regulatory authorizations, our prototype vaccine is marketed under the names (i) Nuvaxovid™ (SARS-CoV-2 rS Recombinant, adjuvanted), (ii) Covovax™ (manufacturing and commercialization by SIIPL), or (iii) Novavax COVID-19 Vaccine, Adjuvanted.

In October 2023, our prototype vaccine received full marketing authorization in the UK from the MHRA in individuals aged 12 and older, full approval in Singapore from Singapore’s Health Sciences Authority in individuals aged 12 and older, full registration in Australia from Australia’s Therapeutic Goods Administration as a booster in individuals aged 12 and older, and authorization in the EU from EMA for use as a booster in adolescents aged 12 through 17 years. We believe these authorizations for our prototype vaccine may facilitate authorizations of our vaccine candidates for our COVID-19 vaccine strain updates in the future.

We are working to continue to expand our label for heterologous boosting in adults and adolescents, to expand our label for primary and re-vaccination in younger children, and to achieve supportive policy recommendations enabling broad market access. We continue to work closely with governments, regulatory authorities, and non-governmental organizations in our commitment to facilitate global access to our COVID-19 vaccine.

We have entered into APAs (also referred to as “supply agreements” throughout this Annual Report on Form 10-K) with the EC and various countries globally. The APAs typically contain terms that include upfront payments intended to assist us in funding investments related to building out and operating our manufacturing and distribution network, among other expenses, in support of our global supply commitment. Such upfront payments generally become non-refundable upon our achievement of certain development milestones. We currently have approximately $2 billion in committed APAs anticipated for future delivery.

We had an APA with the EC, acting on behalf of various European Union member states to supply a minimum of 20 million and up to 100 million initial doses of prototype vaccine, with the option for the EC to purchase an additional 100 million doses up to a maximum aggregate of 200 million doses in one or more tranches through 2023. In 2022, we were notified by the EC that it was cancelling approximately 7 million doses of its prior commitment originally scheduled for delivery in the first and second quarters of 2022, in accordance with the APA, and reducing the order to approximately 63 million doses. In January 2023, we finalized a revised delivery schedule for the remaining 20 million committed doses under the APA that were originally scheduled for delivery during the first and second quarters of 2022. The APA expired in August 2023 and required that any open and outstanding orders from European Union member states be satisfied by February 2024. Since August 2023, any additional doses have been managed by amending outstanding orders with deliveries made by February 2024.

We have an APA with the Commonwealth of Australia for the purchase of doses of COVID-19 Vaccine (the “Australia APA”). In April 2023, we amended the Australia APA to reduce the number of doses to be delivered with a commensurate increase in the per-dose price, such that the total contract value of the Australia APA is maintained with doses to be delivered through 2024. In May 2023, we extended a credit for certain doses delivered in 2022 to Australia that qualified for replacement under the Australia APA. This credit is the result of a single lot sold to the Australian government that upon pre-planned 6-month stability testing was found to have fallen below the defined specifications and the lot therefore was removed from the market. The credit will be applied against the future sale of doses to Australia. In July 2023, we amended the Australia APA to provide for replacement doses and to extend the delivery schedule through 2025. As of February 2024, we had not yet received Therapeutic Goods Administration (“TGA”) authorization or delivered doses as contemplated in the July 2023 amendment and are in active discussions with the Australian government on both the TGA authorization and delivery of the doses previously scheduled for the fourth quarter of 2023. In February 2024, we received notice from the Australian government purporting to cancel its order for such prototype vaccine doses. We believe the cancellation was not proper under the amended Australia APA. However, if such a cancellation were determined to be allowable, $6.0 million of the deferred revenue would become a credit towards future deliveries of doses and approximately $48 million of the contract value related to future deliverables would no longer be available.

We have an APA with His Majesty the King in Right of Canada as represented by the Minister of Public Works and Government Services, as successor in interest to Her Majesty the Queen in Right of Canada, as represented by the Minister of Public Works and Government Services (the “Canadian government”), for the purchase of doses of COVID-19 Vaccine (the “Canada APA”). In April 2023, we amended the Canada APA, pursuant to which the Canadian government forfeited certain doses originally scheduled for delivery in 2022 for a payment of $100.4 million, which we received in the second quarter of 2023. In June 2023, we entered into an additional amendment (the “June 2023 Amendment”) to the Canada APA.

Pursuant to the June 2023 Amendment, (i) the Canadian government forfeited certain doses of COVID-19 Vaccine previously scheduled for delivery and agreed to pay a total amount of $349.6 million to us in two equal installments, which total amount equaled the remaining balance owed by the Canadian government with respect to such forfeited vaccine doses, (ii) the amount of doses of COVID-19 Vaccine due for delivery was reduced, (iii) the delivery schedule for the remaining doses of COVID-19 Vaccine to be delivered was revised, and (iv) the parties agreed Novavax would use the Biologics Manufacturing Centre (“BMC”) Inc. to produce bulk antigen for doses in 2024 and 2025. The June 2023 Amendment maintained the total contract value of the original Canada APA. The first Installment of $174.8 million was payable upon execution of the June 2023 Amendment and received by Novavax in July 2023, and the second installment of $174.8 million was contingent and payable upon the delivery of vaccine doses in the second half of 2023 and received by Novavax in January 2024. The Canadian government may terminate the Canada APA, as amended, if we fail to receive regulatory approval for our COVID-19 Vaccine using bulk antigen produced at BMC on or before December 31, 2024. Our 2024 plans do not currently anticipate the submission for regulatory approval of our COVID-19 Vaccine using bulk antigen produced at BMC, and we plan to work with the Canadian government on an amendment that addresses possible alternatives, which may not be achievable. As of December 31, 2023, $102.8 million was classified as short-term Deferred revenue and $485.3 million was classified as long-term Deferred revenue with respect to the Canadian APA on our consolidated balance sheet. If the Canadian government terminates the Canada APA, $28.0 million of the deferred revenue would become refundable and approximately $224 million of the contract value related to future deliverables would no longer be available (see Note 3 to our consolidated financial statements). In the event that the contract is terminated, we would consider competing in the Canadian commercial market. Pursuant to the June 2023 Amendment, Novavax and the Canadian government will endeavor to expand the previously agreed in-country commitment to Canada and to further partner to provide health, economic, and future pandemic preparedness benefits to Canada, which value may be provided through a number of activities, including without limitation, capital investments, the performance of activities or services, or the provision of technology or intellectual property licenses. Further, the parties will endeavor to enter into a memorandum of understanding (the “MOU”) to illustrate our ability to deliver such benefits over a 15-year period with an aggregate value of not less than 100% of the amount remaining to be paid under the June 2023 Amendment and ultimately received by us. As of December 31, 2023, discussions regarding the MOU were ongoing. We agreed to hold $20.0 million of the second installment payment received in January 2024 in escrow for the benefit of the Canadian government, which amount is the sole recourse available to the Canadian government in the event of non-performance under the MOU.

In July 2022, we entered into an Amended and Restated SARS-CoV-2 Vaccine Supply Agreement (as amended on September 26, 2022, the “Amended and Restated UK Supply Agreement”) with The Secretary of State for Business, Energy and Industrial Strategy (as assigned to the UK Health Security Agency), acting on behalf of the government of the United Kingdom of Great Britain and Northern Ireland (the “Authority”), which amended and restated in its entirety the SARS-CoV-2 Vaccine Supply Agreement, dated October 22, 2020, between the parties (the “Original UK Supply Agreement”). Under the Original UK Supply Agreement, the Authority agreed to purchase 60 million doses of prototype vaccine and made an upfront payment to us. Under the terms of the Amended and Restated UK Supply Agreement, the Authority agreed to purchase a minimum of 1 million doses and up to an additional 15 million doses (the “Conditional Doses”) of prototype vaccine, with the number of Conditional Doses contingent on, and subject to reduction based on, our timely achievement of supportive recommendations from the Joint Committee on Vaccination and Immunisation (the “JCVI”) that is approved by the UK Secretary of State for Health, with respect to use of the vaccine for (a) the general adult population as part of a SARS-CoV-2 vaccine booster campaign in the United Kingdom or (b) the general adolescent population as part of a SARS-CoV-2 vaccine booster campaign in the United Kingdom or as a primary series SARS-CoV-2 vaccination, excluding where that recommendation relates only to one or more population groups comprising less than one million members in the United Kingdom. If the Authority did not purchase the Conditional Doses or if the number of such Conditional Doses was reduced below 15 million doses of prototype vaccine, we would have to repay up to $225 million related to the upfront payment previously received from the Authority under the Original UK Supply Agreement. Under the Amended and Restated UK Supply Agreement, the Authority also has the option to purchase up to an additional 44 million doses, in one or more tranches, through 2024.

As of November 30, 2022, the JCVI had not made a supportive recommendation with respect to prototype vaccine, thereby triggering, under the terms of the Amended and Restated UK Supply Agreement, (i) a reduction of the number of Conditional Doses from 15 million doses to 7.5 million doses, which reduced number of Conditional Doses were contingent on, and subject to further reduction based on, our timely achievement by November 30, 2023 of a supportive recommendation from JCVI that is approved by the UK Secretary of State for Health as described in the paragraph above, and (ii) an obligation for us to repay $112.5 million related to the upfront payment previously received from the Authority under the Original UK Supply Agreement. In April 2023, we repaid the $112.5 million related to the November 30, 2022 triggering event. As of November 30, 2023, the JCVI had not made a supportive recommendation with respect to the prototype vaccine, thereby triggering a reduction in the number of Conditional Doses from 7.5 million doses to zero. As of February 2024, the Company is in discussions with the Authority regarding the treatment of the remaining upfront payment previously received of $112.5 million, which is reflected in Other current liabilities.

In May 2021, we entered into an APA with Gavi, the Vaccine Alliance (“Gavi” and “the Gavi APA”). Under the terms of the Gavi APA and a separate purchase agreement between Gavi and SIIPL, 1.1 billion doses of the prototype vaccine were to be made available to countries participating in the COVAX Facility, which was established to allocate and distribute vaccines equitably to participating countries and economies. We expected to manufacture and distribute 350 million doses of the prototype vaccine to countries participating in the COVAX Facility. Under a separate purchase agreement with Gavi, SIIPL was expected to manufacture and deliver the balance of the 1.1 billion doses of prototype vaccine to low- and middle-income countries participating in the COVAX Facility. We expected to deliver doses with antigen and adjuvant manufactured at facilities directly funded under our funding agreement with the Coalition for Epidemic Preparedness Innovations (“CEPI”), with initial doses supplied by SIIPL and Serum Life Sciences Limited (“SLS”) under a supply agreement. We expected to supply significant doses that Gavi would allocate to low-, middle- and high-income countries, subject to certain limitations, utilizing a tiered pricing schedule and Gavi could prioritize such doses to low- and middle- income countries, at lower prices. Additionally, we could provide additional doses of prototype vaccine, to the extent available from CEPI-funded manufacturing facilities, in the event that SIIPL could not materially deliver expected vaccine doses to the COVAX Facility. Under the agreement, we received an upfront payment of $350.0 million from Gavi in 2021 and an additional payment of $350.0 million in 2022 related to our achieving an emergency use license for our prototype vaccine by the WHO (the “Advance Payment Amount”).

On November 18, 2022, we delivered written notice to Gavi to terminate the Gavi APA on the basis of Gavi’s failure to procure the purchase of 350 million doses of our prototype vaccine from us as required by the Gavi APA. As of November 18, 2022, we had only received orders under the Gavi APA for approximately 2 million doses. On December 2, 2022, Gavi issued a written notice purporting to terminate the Gavi APA based on Gavi’s contention that we had repudiated the agreement and, therefore, materially breached the Gavi APA. Gavi also contended that, based on its purported termination of the Gavi APA, it was entitled to a refund of the Advance Payment Amount less any amounts that have been credited against the purchase price for binding orders placed by a buyer participating in the COVAX Facility. The remaining Gavi Advance Payment Amount, which was $696.4 million as of December 31, 2023 has been classified within Other current liabilities in the Company’s consolidated balance sheet. On January 24, 2023, Gavi filed a demand for arbitration with the International Court of Arbitration based on the claims described above. We filed our Answer and Counterclaims on March 2, 2023. On April 5, 2023, Gavi filed its Reply to our Counterclaims. On February 16, 2024, we and Gavi entered into a Termination and Settlement Agreement (the “ Gavi Settlement Agreement”) terminating the Gavi APA, settling the arbitration proceedings and releasing both parties of all claims arising from, under or otherwise in connection with the Gavi APA. Pursuant to the Settlement Agreement, we are responsible for payment to Gavi of (i) an initial settlement payment of $75 million, which we paid on February 20, 2024, and (ii) deferred payments, in equal annual amounts of $80 million payable each calendar year through a deferred payment term ending December 31, 2028. The deferred payments are due in variable quarterly installments beginning in the first quarter of 2024 and total $400 million during the deferred payment term. Such deferred payments may be reduced through Gavi’s use of an annual vaccine credit equivalent to the unpaid balance of such deferred payments each year, which may be applied to qualifying sales of any of our vaccines for supply to certain low-income and lower-middle income countries. We have the right to price the vaccines offered to such low-income and lower-middle income countries at our discretion, and, when utilized by Gavi, we will credit the actual price per vaccine paid against the applicable credit. We intend to price vaccines offered via the tender process, consistent with our shared goal with Gavi to provide equitable access to those countries. Also in the Settlement Agreement, we grant Gavi an additional credit of up to $225 million, which may be applied against any additional qualifying sales, exceeding the $80 million deferred payment amount in any calendar year, of our vaccines in such countries during such deferred payment term. In addition, we and Gavi entered into a security agreement pursuant to which we granted Gavi a security interest in accounts receivable from SIIPL under the SIIPL R21 Agreement (see Note 4 to our consolidated financial statements for more details on SIIPL R21 Agreement), which will continue for the deferred payment term of the Gavi Settlement Agreement.

(1)    Authorized in select geographies under trade names Novavax COVID-19 Vaccine, Adjuvanted; Covovax™; and Nuvaxovid™, and authorized in the U.S. under trade name, Novavax COVID-19 Vaccine, Adjuvanted (2023-2024 Formula); Ongoing post-authorization Phase 3 strain change trial.

(2)    Authorized in Ghana, Nigeria, and Burkina Faso; Commercialized by Serum Institute of India; Granted prequalification by the WHO.

Our clinical pipeline encompasses vaccine candidates for infectious diseases, with our COVID-19 prototype vaccine (NVX-CoV2373) and our COVID-19 updated vaccine (NVX-CoV2601), as our lead products. Our prototype and updated vaccine has received authorizations for both adult and adolescent populations globally. Our updated vaccine has received authorization from the U.S. FDA, the EC, the WHO, and several other countries globally. We advanced our updated vaccine to a post-authorization Phase 3 safety and immunogenicity trial. Beyond our COVID-19 vaccine, our clinical pipeline includes a CIC vaccine candidate, in addition to our Matrix-M™ adjuvant being used for collaboration in R21/Matrix-M™ adjuvant malaria vaccine.

We are developing a CIC vaccine candidate, which combines our COVID-19 vaccine and our updated seasonal nanoparticle influenza vaccine candidate in a single formulation. We continue to progress a Phase 2 trial of our CIC vaccine candidate. We have selected the CIC dose formulation for advanced development, and contingent upon U.S. FDA concurrence, we are prepared to move directly into a Phase 3 trial in the second half of 2024 to support accelerated approval, with a potential launch in the U.S. in the fall of 2026.

In addition to our CIC vaccine candidate, we believe our partner-led R21/Matrix™ adjuvant malaria vaccine presents significant potential. Based on preliminary results from an ongoing Phase 3 trial in infants and toddlers in Africa, showing 72-79% efficacy, the R21/Matrix™ adjuvant malaria vaccine has been authorized in Ghana, Nigeria, and Burkina Faso, and in December 2023, was granted prequalification by the WHO.

We remain focused on expanding our COVID-19 vaccine label within the booster, adolescent, and pediatric indications. We continue to evaluate vaccine safety, immunogenicity, and effectiveness through ongoing clinical trials and collaborative evidence-generating real-world studies. We expect to leverage these clinical insights to advance additional regulatory approvals of our COVID-19 vaccine globally, amidst the evolving COVID-19 landscape.

Study 311 Part 2: In August 2023, we announced topline results demonstrating immunologic superiority of our bivalent prototype and Omicron BA.5 vaccine compared to our prototype vaccine (NVX-CoV2373) for Omicron BA.5 specific responses. This study is ongoing with the last patient visit expected to occur in the first quarter of 2024. This study design was developed in consultation with regulatory agencies to support our U.S. BLA and regulatory filings in other territories for our strain-change request for our updated vaccine (NVX-CoV2601), and to demonstrate that our protein-based vaccine can be successfully adapted to new variant strains.

Study 313: In September 2023, we fully enrolled 332 adults aged 18 and older in Part 1 of the study to evaluate the immunogenicity and safety of our updated vaccine (NVX-CoV2601) in previously mRNA vaccinated individuals. Preliminary topline results indicate that the study achieved its co-primary endpoints and successfully demonstrated immunological superiority of NVX-CoV2601 compared to our prototype vaccine for Omicron XBB.1.5 specific immune responses.

In November 2023, we fully enrolled 338 adults aged 18 and older in Part 2 of the study which will evaluate the immunogenicity of our updated vaccine (NVX-CoV2601) in previously unvaccinated individuals. Part 2 topline results are expected in the second quarter of 2024. Data from Study 313 are intended to support BLA supplements and similar regulatory submissions in other territories for future variant strain formulations.

Study 314: In September 2023, we fully enrolled 401 adolescents aged 12 to 17 years who were previously vaccinated with mRNA vaccines to evaluate the immunogenicity of boosting with our updated vaccine (NVX-CoV2601) and with a bivalent format vaccine containing our updated vaccine (NVX-CoV2373 + NVX-CoV2601). These data are intended to support adolescent heterologous booster label expansion in some territories with topline results expected in the second quarter of 2024.

In August 2023, we announced topline results from our Phase 2b/3 Hummingbird™ trial that met its primary endpoints in children aged 6 through 11 years demonstrating both tolerability and immunologic responses. We remain on track to submit data for this cohort to the U.S. FDA in the first half of 2024. This ongoing trial is evaluating the safety, effectiveness (immunogenicity), and efficacy of two doses of our prototype vaccine (NVX-CoV2373), followed by a booster 6 months after the primary vaccination series. The trial includes three age de-escalation cohorts of 1,200 children each. The next cohort aged 2 through 5 years is fully enrolled, with topline results expected in the first quarter of 2024. The last cohort aged 6 to 23 months is fully enrolled and topline results are expected in the second quarter of 2024.

We obtained critical funding from the U.S. government to support the development of COVID-19 Vaccine for the U.S. population, including $1.8 billion from a partnership formerly known as Operation Warp Speed. In July 2020, we entered into a Project Agreement (the “Project Agreement”) with Advanced Technology International, Inc. (“ATI”), the Consortium Management Firm acting on behalf of the Medical CBRN Defense Consortium in connection with the partnership. The partnership was among components of the U.S. Department of Health and Human Services and the U.S. Department of Defense working to accelerate the development, manufacturing, and distribution of COVID-19 vaccines, therapeutics, and diagnostics. The Project Agreement relates to the Base Agreement we entered into with ATI in June 2020 (the “Base Agreement,” together with the Project Agreement, the “USG Agreement”). The original USG Agreement required us to conduct certain clinical, regulatory, and other activities, including a pivotal Phase 3 clinical trial to determine the safety and efficacy of prototype vaccine, and to manufacture and deliver to the U.S. government 100 million doses of the vaccine candidate. Funding under the USG Agreement is payable to us for various development, clinical trial, manufacturing, regulatory, and other activities. The USG Agreement contains terms and conditions that are customary for U.S. government agreements of this nature, including provisions giving the U.S. government the right to terminate the Base Agreement or the Project Agreement based on a reasonable determination that the funded project will not produce beneficial results commensurate with the expenditure of resources and that termination would be in the U.S. government’s interest. If the Project Agreement was terminated prior to completion, we were entitled to be paid for work performed and costs or obligations incurred prior to termination and consistent with the terms of the USG Agreement. As of December 31, 2023, we have recognized the full $1.8 billion-funding under the USG Agreement in grant revenue.

Our funding agreement with CEPI, under which CEPI agreed to fund up to $399.5 million to us to support the development of prototype vaccine, provided up to $257.0 million in CEPI Grant Funding and up to $142.5 million in CEPI Forgivable Loan Funding, which are loans in the form of one or more forgivable no-interest term loans to fund certain manufacturing activities and are not subject to restrictive or financial covenants. Payments received under the CEPI Forgivable Loan Funding are only repayable if project vaccine, as defined under the CEPI funding agreement, manufactured by the contract manufacturing organization (“CMO”) network funded by CEPI is sold to one or more third parties (which could include sales credited under the Gavi Settlement Agreement), and such sales cover our costs of manufacturing such vaccine, not including manufacturing costs funded by CEPI. The timing and amount of any loan repayments is currently uncertain.

A summary and status of our historical COVID-19 funding developments follows:

In November 2023, we shared that we previously evaluated 11 discrete CIC formulations in our Phase 2 dose-confirming trial, in which we then selected the CIC dose formulation and remain on track to initiate the Phase 3 trial. We also observed a favorable reactogenicity profile with our combination vaccine that was clinically indistinguishable from the licensed influenza vaccine comparators. This preliminary data suggests that our technology can increase the antigen load while maintaining acceptable tolerability. Pending regulatory concurrence from the U.S. FDA, we expect to initiate a pivotal Phase 3 trial for our CIC vaccine candidate in the second half of 2024, with potential accelerated approval and launch in the fall of 2026.

In May 2023, we announced preliminary topline data from our Phase 2 trial for CIC, stand-alone influenza, and high-dose COVID-19 vaccine candidates. All three vaccine candidates contain our Matrix-M™ adjuvant, showed preliminary robust immune responses, reassuring safety profiles, and reactogenicity that was comparable to the licensed influenza vaccine comparator arms. The Phase 2 dose-confirming randomized, observer-blinded trial evaluated the safety and effectiveness (immunogenicity) of different formulations of the CIC and influenza vaccine candidates, and higher doses of Novavax's COVID-19 vaccine in 1,575 adults aged 50 through 80 years. The CIC vaccine candidate achieved both anti-SARS-CoV-2 immunoglobulin G (IgG) and neutralizing levels comparable to our prototype vaccine. In addition, several of the combination formulations achieved responses to both SARS-CoV-2 and to the four homologous influenza strains that were comparable to the reference comparators, supporting their prioritization for advanced development.

Study 205: In October 2023, we completed enrollment in a Phase 2 trial to evaluate our high-dose COVID-19 vaccine for annual vaccination in 994 adults ages 50 years and older. The trial will compare immunogenicity levels of 5 micrograms of our prototype vaccine (NVX-CoV2373) against 5 micrograms, 35 micrograms, and 50 micrograms of our updated vaccine (NVX-CoV2601) that are matched with different levels of adjuvant. Data from this trial is intended to potentially support further development of a higher-dose formulation for older adults, similar to that of influenza vaccines. Topline results are expected in the first quarter of 2024.

Malaria is a life-threatening disease caused by a parasite that infects mosquitos and is subsequently transmitted to humans. According to the 2023 WHO World Malaria Report, in 2022, there were an estimated 249 million malaria cases and 608,000 malaria-related deaths worldwide. We believe malaria has the potential to be preventable through our partner-led R21/Matrix-M™ adjuvant malaria vaccine, which in 2023 received authorization in several countries and prequalification by the WHO.

R21/Matrix-M™ Adjuvant Malaria Vaccine

R21/Matrix-M™ adjuvant malaria vaccine, formulated with our Matrix-M™ adjuvant is developed by our partner, the Jenner Institute, University of Oxford, and manufactured by SIIPL. We have an agreement with SIIPL related to its manufacture of R21/Matrix-M™ adjuvant malaria vaccine under which SIIPL purchases our Matrix-M™ adjuvant for use in development activities at cost and for commercial purposes at a tiered commercial supply price, and pays a royalty in the single-to low-double digit range based on vaccine sales for a period of 15 years after the first commercial sale of the vaccine in each country.

R21/Matrix-M™ adjuvant malaria vaccine is being evaluated in an ongoing Phase 3 trial conducted by our partner, the Jenner Institute, University of Oxford. In February 2024, peer-reviewed results from the Phase 3 efficacy trial were published in The Lancet reporting R21/Matrix-M™ adjuvant malaria vaccine has a well-tolerated safety profile and offers high-level efficacy against clinical malaria in African children at sites of both seasonal and perennial transmission. This Phase 3 trial enrolled 4,800 children aged 5 to 36 months across five sites in four African countries with differing malaria transmission intensities and seasonality. The trial demonstrated efficacy of 75% when administered prior to the high transmission season during the 12 months following a three-dose series and efficacy of 68% when administered in an age-based schedule in regions where malaria is present perennially during the 12 months following the first three doses. This R21/Matrix-M™ adjuvant malaria vaccine is a low-cost vaccine and has the potential to make a substantial contribution to reducing the burden of malaria disease and deaths in sub-Saharan Africa.

In December 2023, the WHO announced it prequalified the R21/Matrix-M™ adjuvant malaria vaccine to prevent malaria disease in children caused by the P. falciparum parasite in endemic areas. Prequalification status enables United Nations agencies to procure the vaccine for eligible countries and will enable rollout of the vaccine in mid-2024. The WHO recommended that the R21/Matrix-M™ adjuvant malaria vaccine be administered in a four-dose schedule beginning at five months of age.

In July 2023, R21/Matrix-M™ adjuvant malaria vaccine received authorization in Burkina Faso and in April 2023, received authorizations in Ghana and Nigeria.

Our commitment to partnering globally in efforts to further develop our COVID-19 Vaccine is demonstrated through our partnership with SIIPL to supply COVID-19 vaccines to India and low- and middle-income countries.

(1)    SK bioscience also has non-exclusive licenses in Thailand and Vietnam.

A summary of our license and collaboration agreements follows:

We previously granted SIIPL exclusive and non-exclusive licenses for the development, co-formulation, filling and finishing, registration, and commercialization of our prototype vaccine, our proprietary COVID-19 variant antigen candidate(s), and our CIC vaccine candidate. SIIPL agreed to purchase our Matrix-M™ adjuvant, and we granted SIIPL a non-exclusive license to manufacture the antigen drug substance component of our COVID-19 Vaccine in SIIPL’s licensed territory solely for use in the manufacture of COVID-19 Vaccine. Novavax and SIIPL equally split the revenue from SIIPL’s sale of COVID-19 Vaccine in its licensed territory, net of agreed costs. We also have a supply agreement with SIIPL and SLS under which SIIPL and SLS supply us with prototype vaccine, our proprietary COVID-19 variant antigen candidate(s), and our CIC vaccine candidate for commercialization and sale in certain territories, as well as a contract development manufacture agreement with SLS, under which SLS manufactures and supplies finished vaccine product to us using antigen drug substance and Matrix-M™ adjuvant supplied by us. In March 2020, we entered into an agreement with SIIPL that granted SIIPL a non-exclusive license for the use of Matrix-M™ adjuvant supplied by us to develop, manufacture, and commercialize R21/Matrix-M™ adjuvant, a malaria vaccine created by the Jenner Institute, University of Oxford (“R21/Matrix-M™”). R21/Matrix-M™ adjuvant vaccine has been licensed to SIIPL for commercialization and in December 2023 received prequalification by the WHO. Under the agreement, SIIPL purchases our Matrix-M™ adjuvant for use in development activities at cost and for commercial purposes at a tiered commercial supply price, and pays a royalty in the single-to low- double-digit range based on vaccine sales for a period of 15 years after the first commercial sale of the vaccine in each country.

We have a collaboration and license agreement with Takeda Pharmaceutical Company Limited (“Takeda”) under which we granted Takeda an exclusive license to develop, manufacture, and commercialize the Company’s COVID-19 Vaccine in Japan. Under the agreement, Takeda purchases Matrix-M™ adjuvant from us to manufacture doses of COVID-19 Vaccine, and we are entitled to receive milestone and sales-based royalty payments from Takeda based on the achievement of certain development and commercial milestones, as well as a portion of net profits from the sale of COVID-19 Vaccine. In September 2021, Takeda finalized an agreement with the Government of Japan’s Ministry of Health, Labour and Welfare ("MHLW") for the purchase of 150 million doses of its prototype vaccine. In February 2023, MHLW canceled the remainder of doses under its agreement with Takeda. As a result, it is uncertain whether we will receive future sales-based royalty payments from Takeda under the terms and conditions of their current collaboration and licensing agreement.

We have a collaboration and license agreement with SK bioscience to manufacture and commercialize our prototype vaccine for sale to the governments of South Korea, Thailand, and Vietnam. SK bioscience pays a royalty in the low to middle double-digit range.

We are committed to discovering, developing, and commercializing innovative vaccines to prevent serious infectious diseases and are exploring a number of combination vaccine candidates, including a CIC vaccine, directly and by leveraging our strategic global partnerships. In 2021 and 2020, we established a global supply chain and worldwide partnerships to support the commercialization of our prototype vaccine. In 2023 and 2022, we modified and continued to assess our manufacturing needs and our global manufacturing footprint consistent with our contractual obligations to supply, and anticipated demand for COVID-19 Vaccine.

A summary of our key manufacturing and supply arrangements follows:

Matrix-MTM Adjuvant

We manufacture our proprietary saponin-based Matrix-M™ adjuvant at our Novavax AB facility in Uppsala, Sweden. We also have contract manufacturing arrangements with AGC Biologics and the Polypeptide Group to provide contract development and manufacturing services, supplying us with large-scale production of Matrix-M™ adjuvant.

We manufacture the antigen component of our COVID-19 Vaccine at our Novavax CZ facility in the Czech Republic.

We have a supply agreement with SIIPL and SLS, an affiliate of SIIPL, for the manufacture of the antigen component of COVID-19 Vaccine and the co-formulation, fill, and finishing of the finished vaccine product. In May and August 2022, we expanded our license and supply arrangements with SIIPL to include our proprietary COVID-19 variant antigen candidate(s), and our CIC vaccine candidate, so that SIIPL can manufacture and commercialize a vaccine targeting COVID-19 variants, including the Omicron subvariants, and CIC vaccine, and supply such vaccines to us.

In addition to the supply agreement with SIIPL and SLS for the co-formulation, fill, and finishing of the finished vaccine product, we have a contract development manufacture agreement with SLS, pursuant to which SLS will manufacture and supply finished vaccine product to us using antigen drug substance and Matrix-M™ adjuvant supplied by us. Currently, we depend primarily on this supply agreement for co-formulation, filling and finishing (other than in Europe) and our service agreement with PCI Pharma Services (“PCI”) for finishing in Europe.

The vaccine market is intensely competitive, characterized by rapid technological progress. Our technology is based upon utilizing the baculovirus expression system in insect cells to make recombinant vaccines. Our Matrix-M™ adjuvant has demonstrated a potent and well-tolerated effect by stimulating the entry of antigen presenting cells into the injection site and enhancing antigen presentation in local lymph nodes, boosting immune response. We believe this baculovirus expression system with our nanoparticle configuration formulated with our Matrix-M™ adjuvant offers many advantages compared to other technologies, such as enabling dose-sparing effects and refrigerator temperature storage that is well suited for developing COVID-19 and combination vaccines, as well as vaccines against a number of other infectious diseases.

A number of vaccine manufacturers, research institutions, and other organizations have developed a vaccine for SARS-CoV-2, the virus that causes COVID-19. A variety of different vaccine technologies are being studied, including nucleic acid (RNA/DNA), viral vectors, live attenuated or inactivated, and protein-based vaccines. Novavax is the first protein-based COVID-19 vaccine that received EUA by the U.S. FDA and a CMA by EMA in the European Union. As of February 2024, Novavax is one of three manufacturers that have a COVID-19 vaccine that has received authorization by the U.S. FDA for the 2023-2024 vaccination season, with the other manufacturers being Pfizer and Moderna. As of February 2024, the U.S. FDA has granted Pfizer and Moderna BLA approval for their updated vaccines in individuals 12 years and older and EUA for their updated vaccines in individuals 6 months to 11 years, while Novavax received EUA by the U.S. FDA for our updated vaccine in individuals 12 years and older. Based on our COVID-19 vaccine and its high efficacy against both the original and variant strains and its well-tolerated profile demonstrated in clinical trials, including two pivotal Phase 3 trials in the UK and U.S., we believe our vaccine candidate will continue to play an important role in addressing this global public health crisis.

Additionally, we believe that our platform is well suited for combination vaccines, for example influenza and COVID-19. Following our Phase 2 trial results, we have selected a CIC dose formulation and pending regulatory concurrence are on track to initiate a pivotal Phase 3 trial in the second half of 2024, with potential accelerated approval and launch in the fall of 2026. Other manufacturers, including Moderna and Pfizer, are in Phase 3 clinical trials with COVID-19-influenza combination candidates and have publicly disclosed an expected launch date as early as 2025.

In general, competition among pharmaceutical products is based in part on product efficacy, safety, reliability, availability, price, and patent position. An important factor is the relative timing of the market introduction of our products and our competitors’ products. Accordingly, the speed with which we can develop products, complete the clinical trials and approval processes, and supply commercial quantities of the products to the market is an important competitive factor. Our competitive position also may depend upon our ability to show differentiation with a product that is more efficacious and/or less expensive and quicker to manufacture. Other factors affecting our competitive position include our ability to attract and retain qualified personnel, obtain patent protection or otherwise develop proprietary products or processes, and secure sufficient capital resources for the lengthy period between technological conception and commercial sale.

We generally seek patent protection for our technology and product candidates in the U.S. and abroad. The patent position of biotechnology and pharmaceutical firms generally is highly uncertain and involves complex legal and factual questions. Our success will depend, in part, on whether we can:

•obtain patents to protect our own technologies and product candidates;

•obtain licenses to use the technologies of third-parties, which may be protected by patents;

•protect our trade secrets and know-how; and

•operate without infringing the intellectual property and proprietary rights of others.

We have intellectual property (patents, licenses, know-how) related to our vaccines, manufacturing processes, and other technologies. Currently, we have or have rights to over 630 U.S. and foreign patents and patent applications relating to vaccines and vaccine-related technologies.

Patents related to our Virus-Like Particle (“VLP”) program include U.S. Patent No. 7,763,450, which covers, in part, the use of influenza gene sequences for high-yield production of consistent influenza VLP vaccines to protect against current and future seasonal and pandemic strains of influenza viruses. Corresponding European patent, European Patent No. 1644037 also covers this technology. U.S. Patent Nos. 8,080,255, 8,551,756, 8,506,967 and 8,592,197 are directed to methods of producing VLPs and inducing substantial immunity to an influenza virus infection by administering VLPs comprising HA and NA proteins, and our M1 protein derived from the avian influenza strain, A/Indonesia/5/05. Certain claims also encompass similar methods and compositions where the M1 protein is from a different strain of influenza virus than the influenza HA protein and the influenza NA protein. Related patent protection in Europe is provided by European Patent No. 2343084, which covers, in part, vaccine compositions containing VLPs that contain M1, HA, and NA proteins. Our VLP patent portfolio contains many other patents, including U.S. Patent Nos. 8,951,537, 8,992,939, 9,144,607, 9,050,290, 9,180,180, 9,381,239, 9,464,276, 9,474,799, and other patents in multiple ex-U.S. jurisdictions.

In addition to our focus on vaccine programs, we also pursue patent protection for our Matrix Adjuvant program. Issued U.S. Patent Nos. 7,838,019, 9,205,147, 9,901,634, 8,821,881, and 10,729,764 provide examples of patents related to our Matrix Adjuvant program.

We pursue patents related to our COVID-19 vaccine program, including to NVX-CoV2373, our COVID-19 vaccine candidate. Issued U.S. Patent Nos. 10,953,089, 11,253,586, 11,541,112 provide examples of patents related to our COVID-19 program.

We also have four pending PCT applications directed to our COVID program (PCT/US2022/020974, PCT/US2022/080700, PCT/US2022/082331 and PCT/US2022/027465) and two pending PCT applications directed to our malaria program (PCT/US2022/078665 and PCT/US2022/080334).

We continue to prepare, file, and prosecute patent applications to provide broad and strong protection of our proprietary rights related to our vaccine products and our adjuvant program.

The Federal Technology Transfer Act of 1986 and related statutory guidance encourages the dissemination of science and technology innovation. While our expired contract with the U.S. Department of Health and Human Services (“DHHS”), Biomedical Advanced Research and Development Authority provided us with the right to retain ownership in our inventions that may have arisen during performance of that contract, with respect to certain other collaborative research efforts with the U.S. government, certain developments and results that may have commercial potential are to be freely published, not treated as confidential, and we may be required to negotiate a license to developments and results in order to commercialize products. There can be no assurance that we will be able to successfully obtain any such license at a reasonable cost, or that such development and results will not be made available to our competitors on an exclusive or non-exclusive basis.

We also rely significantly on trade secret protection and confidentiality agreements to protect our interests. It is our policy to require employees, consultants, contractors, manufacturers, collaborators, and other advisors to execute confidentiality agreements upon the commencement of employment, consulting, or collaborative relationships with us. We also require confidentiality agreements from any entity that is to receive confidential information from us. With respect to employees, consultants, and contractors, the agreements generally provide that all inventions made by the individual while rendering services to us shall be assigned to us as our property.

As of February 23, 2024, we have 1,543 full-time employees, of whom approximately 9% hold M.D. or Ph.D. degrees and approximately 20% hold other advanced degrees. Of our total workforce, approximately 68% of employees are engaged primarily in research, development, and manufacturing activities and approximately 32% of employees are engaged primarily in executive, business development, commercial, finance and accounting, legal, and administrative functions. Except for certain employees located in Europe, who are covered by collective agreements with trade unions pursuant to local law, none of our employees are represented by a labor union or works council and none of our employees have entered into a collective bargaining agreement with us.

To nurture, grow, and treat our employees fairly is an integral part of our culture. We are proud to have won a Silver Stevie Award in 2023 for Great Employer in the Pharmaceutical category. We believe this award reflects our investment in an exceptional work culture.

Our total rewards package is designed to attract, engage, motivate, and retain top talent. We strive to provide compensation, benefits, and services that help meet the varying needs of our employees. Our generous total rewards package for employees in the U.S. includes competitive market pay and comprehensive benefits, including insurance to protect and maintain health; income protection through our short- and long-term disability programs and life insurance; adoption assistance and paid parental leave programs; and services to assist in balancing work and personal life, such as backup child, adult, and elder care, and financial well-being programs, including monthly financial wellness seminars, one-on-one financial planning sessions, and debt and credit management support.

Our wellness initiatives include a monthly newsletter, which highlights organizations and partners, tools, and resources intended to help our employees lead healthier and happier lives. We offer several digital apps that allow our employees to connect to an online licensed therapist or to access activities that are designed to reduce stress and anxiety and increase mindfulness and emotional well-being. We have a robust employee assistance program for employees to access support for a variety of life events.

In addition, we offer the majority of employees the benefit of equity ownership in the Company through equity grants or participation in our employee stock purchase plan. We believe that equity compensation has been, and will continue to be, a critical component of our compensation package because it develops a culture of ownership among our employees and aligns their interests with the interests of our stockholders.

The attraction, development, and retention of employees is a critical factor for our success. We utilize a variety of recruitment vehicles to source top talent, including strategic partnerships with search firms, leveraging social media channels, and a robust employee referral program. In 2023, we launched the Leading@Novavax competency model to define great leadership. At Novavax, everyone is a leader and this model and associated tools, resources, and programs develops leadership skills at all levels of the organization.

To support the growth and advancement of our employees, we offer tuition and continuing education reimbursement, and an array of training and professional development opportunities, including on-the-spot coaching with executive coaches and access to the LinkedIn Learning library of over 16,000 on-demand video tutorials that address skills, knowledge, and behaviors related to business, leadership, technology, and innovation. In the last 12 months, videos were viewed and completed over 40,000 times by our employees. In addition, approximately 135 employees have participated in spot coaching. We provide an Executive Development Program for employees identified as having high potential and for employees who have been identified as potential successors to leadership positions through our talent review and succession planning process. Our Executive Development Program includes executive coaching engagements and leadership development programs designed to strengthen our leadership bench and accelerate and prepare our top talent for future growth. The Executive Development Program includes a diverse and global group of 34 employees. Professional development learning series are available to all employees and focus on self-awareness, collaboration, hybrid working, leadership, and business acumen.

We employ a variety of tools to facilitate open and direct communication, including global forums with executives, employee surveys, and engagement through forums and committees. Our executive leadership team recognizes the importance of increased employee engagement to the success of each individual’s career and to our success as a whole.

Our culture of diversity, equity and inclusion (“DEI”) helps us to create, develop and leverage the strengths of our workforce to meet our growth objectives. Our multi-year DEI roadmap includes three pillars:

•Embed DEI into our hiring decisions and processes.

•Enable our employees, who we refer to as our SuperNovas, to live our values and thrive in a culture of inclusion.

•Equip our leaders and SuperNovas with the understanding, capability, education, tools and resources on DEI.

We acknowledge global DEI-related observances and we invest in training to build an inclusive culture and develop our leaders to access different perspectives when generating ideas and decision making. In 2023, we also made progress in increasing representation for women and minorities at the Executive level. We commenced and completed the reviews of three people processes, namely, Talent Acquisition, Promotion and Performance Management. We also have intentionally incorporated DEI principles into our Novavax Leadership Model. We believe our multi-year DEI strategy and roadmap will enable us to continuously improve and excel.

In 2023, Novavax sought to motivate and empower employees through a variety of programs:

•Made charitable donations in employees’ name to other mission-driven organizations in the U.S., Sweden and Czech Republic through employee match and direct giving.

•Furthered personal and professional development by providing tuition and education reimbursement and providing access to professional coaching and Executive Development programming for high-potential employees.

In addition to the DEI and human capital initiatives described above, a range of other initiatives related to environmental, social and governance (“ESG”) are underway. These include environmental sustainability, innovating for vaccine access and improving global health, empowering our employees and governing responsibly. We believe that our multi-stakeholder approach through these focus areas is critical to our long-term success and enhances value for our shareholders. Examples of initiatives supportive of these focus areas include the following:

•Resource management and greenhouse gas reduction strategy, which includes tracking emissions.

•An approach to Procurement that incorporates sustainability metrics into vendor evaluation and selection rubrics.

•Lease of approximately 170,000 square foot property in Gaithersburg, Maryland at 700 Quince Orchard Road, certified LEED Silver and designed with energy efficiency and sustainability measures in place.

•Conserving water (e.g., by replacing single-serve water bottles with refillable options) and monitoring energy use across multi-use leased and owned facilities.

•Award of WELL certifications at multiple leased facilities.

•Sustainable saponin sourcing from our partner Desert King, the key supplier of the Quillaja saponaria (Soapbark), a tree native to central Chile. Saponin is used to produce our Matrix-M™ adjuvant.

•R21/Matrix-M™ malaria vaccine, developed by the University of Oxford and its Jenner Institute and the Serum Institute of India, and formulated with our Matrix-M adjuvant is now approved in three countries and prequalified by the WHO.

•Advocacy efforts to build a bureau of third-party organizations who are registered with the CDC to provide public commentary on behalf of Novavax, including the National Health Council, Vaccinate Your Families and the National Black Nurses Association.

•Efforts focused on clinical trial diversity (economic, race, age).

•Focused on seeking to foster an environment with no barriers to use of our vaccines due to either physical availability or pricing of the product.

•100% returns for certain vaccinators offered with Novavax assuming all financial risk related to returns.

•In the U.S., participated in the Vaccines for Children (VFC) Program, which serves as a critical safety net for children under 19 who are Medicaid-eligible, uninsured, underinsured or American Indian/Alaskan Native.

•In the U.S., participated in the 317 Program, which serves uninsured and underinsured adults and supports Federal Qualified Health Centers that potentially vaccinate uninsured and underinsured patients.

•In the U.S., participated in the “Bridge Access Program For COVID Vaccines and Treatments” to provide access to COVID-19 vaccine option for adults without other sources of coverage.

•Policy remains in place to comply with all government and regulatory agency requirements and industry standards with good laboratory practices (“GLP”), current good manufacturing practices (“cGMP”) and good distribution practices (“GDP”).

•Practice responsible animal welfare practices including searching for non-animal alternatives whenever possible, abiding by the 3R-principle (Reduce, Refine, Replace), working with accredited animal facilities with regional independent animal experimentation ethical review boards approving all experiments.

•“The NovaCode,” a robust handbook of written standards and business ethics policies remains in place.

•Maintain a global hotline for reporting compliance concerns with established internal investigating protocols.

•Maintain a Strategic Compliance Governance Committee to help our partners comply with U.S. regulations.

•Chief Compliance Officer elevated to report to the CEO with a dotted line to the Audit Committee.

•Hold company-wide business ethics training, guidance, and raw materials review.

•Keep an anti-bribery and anti-corruption policy in place to ensure a transparent and ethical business model.

•Standard operating procedures guide decision-making.

•Abide by robust cybersecurity standards, meeting elevated government contracting requirements.

•Chief Safety Officer continues to build out a robust epidemiology benefit / risk group to better understand the safety profiles of different vaccines.

•Ongoing employee training for updated Safety Policy.

The development, production, and marketing of biological products, which include the vaccine candidates being developed by Novavax or our collaborators, are subject to regulation for safety, efficacy, and quality by numerous governmental authorities in the U.S. and other countries. We focus on the U.S. regulatory process and the standards imposed by the U.S. FDA, the International Council for Harmonisation (“ICH”), and other agencies because we believe meeting U.S. and ICH standards generally allows us to also satisfy regulatory agencies’ standards in other countries where we intend to do business. However, we are mindful that expectations in some venues, notably in the European Union and the United Kingdom (in relation to Great Britain), differ to some degree and we take proactive steps to address such differences by maintaining regular filings and correspondence and attending regular meetings with many other non-U.S. regulatory agencies. In the U.S., the development, manufacturing, and marketing of human pharmaceuticals and vaccines are subject to extensive regulation under the Federal Food, Drug, and Cosmetic Act, and biological products are subject to regulation under provisions of that act and the Public Health Service Act. The U.S. FDA not only assesses the safety and efficacy of these products, but it also regulates, among other things, the testing, manufacture, labeling, storage, record-keeping, advertising, and promotion of such products. The process of obtaining U.S. FDA licensure for a new vaccine is costly and time-consuming.

Vaccine clinical development in most countries follows the same general regulatory pathway as drugs and other biologics. Before applying for U.S. FDA licensure to market any new vaccine candidate, we expect to first submit an investigational new drug application (“IND”) that explains to the U.S. FDA, among other things, the results of preclinical toxicology testing conducted in laboratory animals, the method of manufacture, quality control tests for release, the stability of the investigational product, and our proposed plans for human testing. At this stage, the U.S. FDA decides whether it is reasonably safe to move forward with testing the vaccine candidate in humans. We must then conduct Phase 1 clinical trials and larger-scale Phase 2 and 3 clinical trials that demonstrate the safety, immunogenicity, and efficacy of our vaccine candidate to the satisfaction of the U.S. FDA. Following successful completion of all three phases of clinical development, a BLA can be submitted to the U.S. FDA requesting licensure of the vaccine for marketing based on the vaccine’s safety and efficacy. Similar pathways exist in Europe and other geographies.

The U.S. FDA will only approve a BLA if the vaccine is demonstrated to be safe, pure, and potent. During the U.S. FDA’s review of a BLA, the proposed manufacturing facility undergoes a pre-approval inspection during which the U.S. FDA examines in detail the production of the vaccine, the manufacturing facility, and the quality documentation related to the vaccine. Vaccine licensure also requires the provision of adequate product labeling to allow health care providers to understand the vaccine’s proper use, including its potential benefits and risks, to communicate with patients and parents, and to safely deliver the vaccine to the public. Until a vaccine is given to the general population, all potential adverse events cannot be anticipated. Thus, the U.S. FDA typically requires Phase 4 post-marketing clinical trials for vaccines after licensure to continue gathering safety, and sometimes effectiveness/efficacy data in the indicated and additional populations.

The Commissioner of the U.S. FDA may, following the issuance of an appropriate declaration by the Secretary of the DHHS, issue an EUA that would permit the use of an unapproved medical product or unapproved use of an approved medical product to diagnose, treat, or prevent serious or life-threatening diseases or conditions when there are no adequate, approved, and available alternatives. When issuing an EUA, the U.S. FDA imposes conditions of authorization, with which the EUA holder must comply. Such conditions include, but may not be limited to, compliance with labeling, distribution of materials designed to ensure proper use, reporting obligations, and restrictions on advertising and promotion. The EUA is only effective for the duration of the declaration issued by the Secretary of the DHHS that EUAs are appropriate. The U.S. FDA may also revise or revoke the EUA sooner if the criteria for issuance are no longer met or other circumstances make a revision or revocation appropriate to protect the public health or safety. For example, an EUA may be revoked when the U.S. FDA determines that the underlying public health threat no longer exists or warrants such authorization, or for reasons such as significant adverse inspectional findings, reports of adverse events linked to or suspected of being caused by the EUA product, or newly emerging data that may demonstrate the product may not be effective. An EUA is separate from and not dependent on the issuance of a public health emergency (“PHE”) by the Secretary of the DHHS. Therefore, although the COVID-19 PHE expired on May 11, 2023, that expiration will not terminate EUAs issued by the U.S. FDA.

In order to ensure continuing safety, the U.S. FDA and most other non-U.S. based regulatory agencies continue to oversee the production of vaccines even after the vaccine and manufacturing processes are approved. For example, monitoring of the vaccine and of production activities, including periodic facility inspections, must continue as long as the manufacturer holds a license for the product. Manufacturers may also be required to submit the results of their own tests for potency, safety, and purity for each vaccine lot, if requested by the relevant regulatory agency. They may also be required to submit samples of each vaccine lot to the agency for testing.

In addition to obtaining U.S. FDA licensure for each product, each domestic manufacturing establishment must be registered with the U.S. FDA, is subject to U.S. FDA inspection, and must comply with current Good Manufacturing Practices (“GMP”) regulations. To supply products for use either in the U.S. or outside the U.S., including clinical trials, U.S. and foreign manufacturing establishments, including third-party facilities, must comply with GMP regulations and are subject to periodic inspection by the U.S. FDA or by corresponding regulatory agencies in their home country.

The EU and the UK similarly provide a faster means to achieve approval by offering CMA to fulfil unmet medical needs. CMAs are granted with the proviso of obtaining additional comprehensive data to confirm the benefit/risk so that the MA will eventually become unconditional. The benefit to public health of the immediate availability on the market of the medicinal product concerned should outweigh the risk inherent in the fact that additional data are still required.

The U.S. FDA has several programs designed to expedite the development and approval of drugs and biological products intended to treat serious or life-threatening diseases or conditions, including fast track designation, breakthrough therapy designation, priority review designation, and accelerated approval. First, the U.S. FDA may designate a product for Fast Track review if it is intended, whether alone or in combination with one or more other products, for the treatment of a serious or life-threatening disease or condition and demonstrates the potential to address unmet medical needs for such a disease or condition. For Fast Track products, sponsors may have more frequent interactions with the U.S. FDA and the U.S. FDA may initiate review of sections of a Fast Track product’s application before the application is complete. The U.S. FDA granted Fast Track Designation for our prototype vaccine in November 2020 and for our recombinant quadrivalent seasonal influenza vaccine candidate, in January 2020.

Second, a product may be designated as a Breakthrough Therapy if it is intended, either alone or in combination with one or more other products, to treat a serious or life-threatening disease or condition and preliminary clinical evidence indicates that the product may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints. The U.S. FDA may hold meetings with the sponsor throughout the development process, provide timely advice to the product sponsor regarding development and approval, involve more senior staff in the review process, assign a cross-disciplinary project lead for the review team, and take other steps to design the clinical trials in an efficient manner.

Third, the U.S. FDA may designate a product for priority review if it is a product that treats a serious disease or life-threatening condition and, if approved, would provide a significant improvement in safety or effectiveness over available therapies. Significant improvement may be illustrated by evidence of increased effectiveness in the treatment of a condition, elimination or substantial reduction of a treatment-limiting product reaction, documented enhancement of patient compliance that may lead to improvement in serious outcomes, and evidence of safety and effectiveness in a new subpopulation. A priority designation is intended to direct overall attention and resources to the evaluation of such applications, and, for a drug product (including a vaccine), to shorten the U.S. FDA’s goal for taking action on a marketing application from ten months to six months.

Fourth, a product may be eligible for accelerated approval, if it treats a serious or life-threatening condition and generally provides a meaningful advantage over available therapies. In addition, it must demonstrate an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit or on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality (“IMM”) that is reasonably likely to predict an effect on IMM or other clinical benefit. As a condition of approval, the U.S. FDA may require that a sponsor of a drug or biologic receiving accelerated approval perform adequate and well-controlled post-marketing clinical trials to confirm efficacy using a clinically meaningful endpoint, thereby confirming efficacy observed pre-approval using a surrogate endpoint. In June 2019, we announced that the U.S. FDA acknowledged that the accelerated approval pathway is available for our recombinant quadrivalent seasonal influenza vaccine candidate.

In addition to regulatory approvals that must be obtained in the U.S., an investigational product is also subject to regulatory approval in other countries in which it is intended to be marketed. No such product can be marketed in a country until the regulatory authorities of that country have approved an appropriate marketing application. U.S.FDA licensure does not guarantee approval by other regulatory authorities. In addition, in many countries, the government is involved in the pricing of the product. In such cases, the pricing review period often begins after market approval is granted.

We are also subject to regulation under the Occupational Safety and Health Act, the Environmental Protection Act, the Toxic Substances Control Act, the Resource Conservation and Recovery Act, and other present and potential federal, state, or local regulations, including national and local regulations that govern our facilities in Sweden, the Czech Republic and Switzerland. These and other laws govern our use, handling, and disposal of various biological and chemical substances used in, and waste generated by, our operations. Our research and development involves the controlled use of hazardous materials, chemicals, and viruses. Although we believe that our safety procedures for handling and disposing of such materials comply with the standards prescribed by state and federal regulations, the risk of accidental contamination or injury from these materials cannot be completely eliminated. In the event of such an accident, we could be held liable for any damages that result and any such liability could exceed our resources. Additionally, for formulations containing controlled substances, we are subject to Drug Enforcement Act regulations.

In both domestic and foreign markets, sales of any products for which we receive regulatory approval for commercial sale will depend in part on the availability of reimbursement from third-party payers. Third-party payers include government authorities or programs, private health insurers (including managed care plans), and other organizations. These third-party payers are increasingly challenging the price and examining the cost-effectiveness of medical products and services. In addition, significant uncertainty exists as to the reimbursement status of newly approved healthcare products. We may need to conduct expensive pharmacoeconomic studies in order to demonstrate the cost-effectiveness of our products. There may be significant delays in obtaining coverage and reimbursement for newly approved drugs, and coverage may be more limited than the indications for which the product is approved by the U.S. FDA or similar regulatory authorities outside the United States. Our product candidates may not be considered cost-effective at certain prices. Adequate third-party reimbursement may not be available in certain markets to enable us to maintain price levels sufficient to realize an appropriate return on our investment in product development. Third-party payors may also control access to, or manage utilization of, our products with various utilization management techniques. Decreases in third-party reimbursement for our product candidates or a decision by a third-party payer to not cover our product candidates could reduce physician utilization of our products and have a material adverse effect on our sales, results of operations, and financial condition.

Within the U.S., if we obtain appropriate approval in the future to market any of our product candidates, those products could potentially be covered by various government health benefit programs, as well as purchased by government agencies. The participation in such programs or the sale of products to such agencies is subject to regulation. In exchange for coverage, we may be obligated to provide rebates or offer discounts under government health programs or to government and private purchasers.

The U.S. and state governments continue to propose and pass legislation designed to reform delivery of, or payment for, health care, including initiatives to reduce the cost of healthcare. In March 2010, the U.S. Congress enacted the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act (“ACA”), which includes changes to the coverage and reimbursement of drug products under government health care programs. Since its enactment, there have been several executive, judicial and Congressional challenges to certain aspects of the ACA, and additional challenges and amendments to the ACA may reduce the profitability of drug products. Adoption of price controls and cost-containment measures and adoption of more restrictive policies in jurisdictions with existing controls and measures could further limit our net revenue and results.

Other legislative changes have been proposed and adopted in the United States since the ACA was enacted that impact drug pricing. For example, through the process created by the Budget Control Act of 2011, there are automatic reductions of Medicare payments to providers of up to 2% per fiscal year, which went into effect in April 2013 and will remain in effect through 2030. Under the American Rescue Plan Act of 2021 (“ARPA”), Medicaid and Children’s Health Insurance Program (“CHIP”) programs must cover without cost-sharing COVID-19 vaccines for most Medicaid and CHIP enrollees through September 30, 2024. After such date, under the Inflation Reduction Act of 2022 (“IRA”), Medicaid and CHIP programs will be required to cover without cost-sharing only U.S. FDA-approved COVID-19 vaccines for adults as recommended by the ACIP.

There has been considerable public and government scrutiny in the U.S. of pharmaceutical pricing and proposals to address the perceived high cost of pharmaceuticals. There have also been several recent state legislative efforts to address drug costs, which generally have focused on increasing transparency around drug costs or limiting drug prices or price increases. Adoption of new legislation at the federal or state level could affect demand for, or pricing of, our product candidates if approved for sale. It is also possible that additional governmental action will be taken in response to the COVID-19 pandemic. We cannot predict the ultimate content, timing, or effect of any federal and state reform efforts. There is no assurance that federal or state health care reform will not adversely affect our future business and financial results.

Similarly, in many countries outside the U.S., pharmaceutical pricing is subject to regulatory control, particularly in countries where healthcare is provided mainly through government funding or government backed insurers. In such countries governmental organizations will generally determine firstly if a medicinal product might be reimbursed and secondly the maximum price payable.

Within the U.S., we may be subject to various federal and state laws pertaining to health care “fraud and abuse,” including anti-kickback laws and false claims laws, for activities related to future sales of any of our product candidates that may in the future receive regulatory and marketing approval. Anti-kickback laws generally prohibit a pharmaceutical manufacturer from soliciting, offering, receiving, or paying any remuneration to generate business, including the purchase, prescription, or use of a particular drug. Although the specific provisions of these laws vary, their scope is generally broad and there may not be regulations, guidance, or court decisions that apply the laws to particular industry practices. There is therefore a possibility that our practices might be challenged under such anti-kickback laws. False claims laws, including the federal False Claims Act (“FCA”), prohibit anyone from knowingly and willingly presenting, or causing to be presented, any claims for payment for reimbursed drugs or services to third party payers (including Medicare and Medicaid) that are false or fraudulent. Our activities relating to the sale and marketing of our products may be subject to scrutiny under these laws. Violations of fraud and abuse laws may be punishable by criminal or civil sanctions, including fines and civil monetary penalties, and exclusion from federal health care programs (including Medicare and Medicaid). In the U.S., federal and state authorities are paying increased attention to enforcement of these laws within the pharmaceutical industry and private individuals have been active in alleging violations of the laws and bringing suits on behalf of the government under the FCA. If we were subject to allegations concerning, or were convicted of violating, these laws, our business could be harmed.

On November 20, 2020, the DHHS published a Final Rule entitled “Removal of Safe Harbor Protection for Rebates to Plans or PBMs Involving Prescription Pharmaceuticals and Creation of New Safe Harbor Protection,” commonly referred to as the “Rebate Rule,” which amends the federal Anti-Kickback Statute discount safe harbor by eliminating protection for price concessions, including rebates, that are offered by pharmaceutical manufacturers to plan sponsors, or pharmacy benefit managers under contract with them, under the Medicare Part D program and Medicare Advantage Plans, unless the price reduction is one required by law. The IRA will delay implementation of this Rebate Rule until 2032. This new rule could result in a change in incentives for health plans and pharmacy benefit managers in negotiating rebates and discounts with manufactures for preferred formulary placement.

At this time, we cannot predict how these developments may impact our business and operations if our products are commercialized in the U.S.

Within the European Union and the United Kingdom, the provision of benefits or advantages to physicians to induce or encourage the prescription, recommendation, endorsement, purchase, supply, order, or use of medicinal products is prohibited. The provision of benefits or advantages to physicians is also governed by the national anti-bribery laws of EU Member States and the United Kingdom, such as the UK Bribery Act 2010. Infringement of these laws could result in substantial fines and imprisonment.

We are also subject to the U.S. Foreign Corrupt Practices Act (“FCPA”), which prohibits any U.S. individual or business from paying, offering, authorizing payment of, or offering anything of value, directly or indirectly, to any foreign official, political party, or candidate for the purpose of influencing any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the U.S. to comply with certain accounting provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries, and to devise and maintain an adequate system of internal accounting controls for international operations. Compliance with the FCPA is expensive and difficult, particularly in countries in which corruption is a recognized problem. In addition, the FCPA presents particular challenges in the pharmaceutical industry, because, in many countries, hospitals are operated by the government, and doctors and other hospital employees are considered foreign officials. Certain payments to hospitals in connection with clinical trials and other work have been deemed to be improper payments to government officials and have led to FCPA enforcement actions. Various laws, regulations, and executive orders also restrict the use and dissemination outside the U.S. or the sharing with certain non-U.S. nationals of information classified for national security purposes, as well as certain products and technical data relating to those products. As we expand our presence outside the U.S., it will require us to dedicate additional resources to comply with these laws, and these laws may preclude us from developing, manufacturing, or selling certain products and product candidates outside the United States, which could limit our growth potential and increase our development costs. We cannot guarantee that we, our employees, our consultants, or our third-party contractors are or will be in compliance with all federal, state, and foreign regulations regarding bribery and corruption. Moreover, our strategic collaborators and third-party contractors located outside the U.S. may have inadequate compliance programs or may fail to respect the laws and guidance of the territories in which they operate. The failure to comply with laws governing international business practices may result in substantial civil and criminal penalties and suspension or debarment from government contracting. The Securities and Exchange Commission (“SEC”) also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA’s accounting provisions. Even if we are not determined to have violated these laws, government investigations into these issues typically require the expenditure of significant resources and generate negative publicity, which could also have an adverse effect on our business, financial condition, and results of operations.

The Federal Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), created additional federal criminal statutes that prohibit, among other actions, knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program, including private third-party payors; knowingly and willfully embezzling or stealing from a healthcare benefit program; willfully obstructing a criminal investigation of a healthcare offense; and knowingly and willfully falsifying, concealing, or covering up a material fact or making any materially false, fictitious, or fraudulent statement in connection with the delivery of or payment for healthcare benefits, items, or services. HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act (“HITECH”), and their implementing regulations, impose requirements regarding the privacy and security of individually identifiable health information, including mandatory contractual terms, for covered entities, or certain healthcare providers, health plans, and healthcare clearinghouses, and their business associates that provide services to the covered entity that involve individually identifiable health information and their subcontractors that use, disclose, or otherwise process individually identifiable health information. HITECH also increased the civil and criminal penalties that may be imposed against covered entities and business associates and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce HIPAA. While pharmaceutical and biotechnology companies are typically not directly regulated by HIPAA, our business may be indirectly impacted by HIPAA in our interactions with providers, payors, and others that have HIPAA compliance obligations. We are also subject to state and foreign laws governing the privacy and security of health or personal information such as the European Union General Data Protection Regulation (“GDPR”) and the California Consumer Privacy Act of 2018 (“CCPA”).

There also are U.S. federal transparency requirements under the Physician Payments Sunshine Act that require manufacturers of U.S. FDA-approved drugs, devices, biologics and medical supplies covered by Medicare or Medicaid to report, on an annual basis, to CMS information related to payments and other transfers of value to physicians, teaching hospitals, and certain advanced non-physician health care practitioners and physician ownership and investment interests. Some U.S. states have transparency laws requiring the reporting of information that differs from the scope of information reported under the federal law, which permits these additional state requirements.

Within the European Union and the United Kingdom, payments made to physicians must be publicly disclosed. Moreover, agreements with physicians must in some countries be the subject of prior notification and approval by the physician’s employer, their competent professional organization, or the regulatory authorities of the individual country. These requirements are provided in the national laws, industry codes, or professional codes of conduct, applicable in the European Union Member States. Failure to comply with these requirements could result in reputational risk, public reprimands, administrative penalties, fines, or imprisonment.

Laws and regulations have been enacted by the federal government and various states to regulate the sales and marketing practices of pharmaceutical manufacturers with marketed products. The laws and regulations generally limit financial interactions between manufacturers and health care providers and/or require disclosure to the government and public of such interactions. Many of these laws and regulations contain ambiguous requirements or require administrative guidance for implementation. Given the lack of clarity in laws and their implementation, any future activities (if we obtain approval and/or reimbursement from federal healthcare programs for our product candidates) could be subject to challenge.

Given the significant global impact of the COVID-19 pandemic, it is possible that one or more government entities may take actions, including the U.S. government under the Defense Production Act of 1950, as amended, which could directly or indirectly have the effect of diminishing some of our rights or opportunities with respect to our COVID-19 Vaccine and the economic value of a COVID-19 vaccine to us could be limited. In addition, during a global health crisis, such as the COVID-19 pandemic, where the spread of a disease needs to be controlled, closed or heavily regulated national borders will create challenges and potential delays in our development and production activities and may necessitate that we pursue strategies to develop and produce our vaccine candidates within self-contained national or international borders, at potentially much greater expense and with longer timeframes for public distribution.

We face an inherent risk of product liability as a result of the clinical testing of our product candidates and commercialization of our products. For example, we may be sued if any product we develop allegedly causes injury or is found to be otherwise unsuitable during product testing, manufacturing, marketing, or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability, and a breach of warranties. Claims could also be asserted under state consumer protection acts. If we cannot successfully defend ourselves against product liability claims, we may incur substantial liabilities or be required to limit commercialization of our product candidates. In the United States, the Public Readiness and Emergency Preparedness Act (the “PREP Act”), when applicable, provides immunity for manufacturers from all claims under state or federal law for “loss” arising out of the administration or use of a “covered countermeasure.” However, injured persons may still bring a suit for “willful misconduct” against the manufacturer under some circumstances. “Covered countermeasures” include security countermeasures and “qualified pandemic or epidemic products,” including products intended to diagnose or treat pandemic or epidemic disease, such as pandemic vaccines, as well as treatments intended to address conditions caused by such products. For these immunities to apply, the Secretary of DHHS must invoke the PREP Act by issuing a declaration that a public health emergency or “credible risk” of a future public health emergency exists. On March 17, 2020, the Secretary of DHHS issued a declaration under the PREP Act and has issued subsequent amendments thereto since then to provide liability immunity for activities related to certain countermeasures against the ongoing COVID-19 pandemic. The current declaration will end on December 31, 2024, unless it is renewed. While we believe our products would be covered under the current PREP Act declaration, this cannot be assured.

Also, there can be no assurance that the Secretary of the DHHS will make other declarations in the future that cover any of our other product candidates or that the U.S. Congress will not act in the future to reduce coverage under the PREP Act or to repeal it altogether. If product liability lawsuits are brought against us, we may incur substantial liabilities and may be required to limit commercialization of our product candidates.

Our website address is www.novavax.com. We make available, free of charge and through our website, our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and our other filings with the SEC, and any amendments to any such reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, as soon as reasonably practicable after filed with or furnished to the SEC. The SEC maintains an Internet site that contains reports, proxy, and information statements, and other information regarding issuers that file electronically with the SEC at www.sec.gov.

We use our website (www.novavax.com) as a means of disclosing material non-public information and for complying with our disclosure obligations under Regulation Fair Disclosure promulgated by the SEC. These disclosures are included on our website (www.novavax.com) in the “Investors” or “News” sections. Accordingly, investors should monitor these portions of our website (www.novavax.com), in addition to following our press releases, SEC filings, and public conference calls and webcasts.

Also available on our website is information relating to corporate governance at Novavax and our Board of Directors, including our Code of Conduct. We intend to disclose on our website any future amendments to and waivers from this code that apply to our Chief Executive Officer, Principal Financial Officer, Principal Accounting Officer and Controller, and persons performing similar functions, as promptly as practicable, as may be required under applicable SEC and Nasdaq rules.

We webcast our earnings calls and certain events we participate in or host with members of the investment community on the investor relations section of our website. Additionally, we provide notifications of news or announcements regarding press and earnings releases as part of the investor relations section of our website. The contents of our website are not part of this Annual Report on Form 10-K, or any other report we file with, or furnish to, the SEC.

You should carefully consider the following risk factors in evaluating our business. A number of risks could cause our actual results to differ materially from those that are indicated by forward-looking statements. Some risks relate principally to our business and the industry in which we operate. Others relate principally to the securities market and ownership of our common stock. The risks and uncertainties described below are not the only ones we face. Additional risks and uncertainties of which we are unaware, or that we currently deem immaterial, also may become important factors that affect us. Any of the following risks could result in material adverse impacts on our business, financial condition, or results of operations. You also should consider the other information included in this Annual Report on Form 10-K as well as our other filings with the SEC.

Our business is subject to numerous risks. The following is a summary of the principal risk factors described in this section:

•We have a history of losses and our future profitability is uncertain.

•We will continue to require significant funding to maintain our current level of operations and fund the further development of our vaccine candidates.

•Because our vaccine product development efforts depend on new and rapidly evolving technologies, our efforts may not succeed.

•The regulatory and commercial success of our COVID-19 Vaccine remains uncertain. While we have received full MA, provisional registration, CMA, or EUA for our prototype COVID-19 Vaccine and our updated COVID-19 vaccine in a number of jurisdictions, we may be unable to obtain full regulatory approvals in the U.S. or other jurisdictions for our updated vaccine or new versions in the future or produce a successful vaccine in a timely manner, if at all.

•The emergence and transmissibility of variants of the SARS-CoV-2 virus, may affect market acceptance or sales of our COVID-19 Vaccine, and our strategy to develop new versions of our COVID-19 Vaccine to protect against certain variants may not be successful.

•We are a biotechnology company and face significant risk in developing, manufacturing, and commercializing our products and product candidates.

•Because we depend on third parties to conduct some of our laboratory testing and clinical trials, and a significant amount of our vaccine manufacturing and distribution, we may encounter delays in or lose some control over our efforts to develop and supply products.

•We are highly dependent on the commercial success of our COVID-19 Vaccine, and even though we have received provisional registration, CMA, EUA or full marketing authorization in certain jurisdictions for our COVID-19 Vaccine, and even if we have products licensed in additional markets, our vaccine products may not be initially or ever profitable.

•The risks associated with COVID-19 and related governmental public health policies continue to evolve, which may have unpredictable effects on the prospects for commercial success of our COVID-19 Vaccine.

•Many of our competitors have significantly greater resources and experience, which may negatively impact our commercial opportunities and those of our current and future licensees.

•There is significant competition in the development of a vaccine against COVID-19 and a combined vaccine against COVID-19 and influenza, and we may never see returns on the significant resources we are devoting to our vaccine candidates.

•We may not succeed in obtaining full U.S. FDA licensure or foreign regulatory approvals necessary to sell our vaccine candidates.

•Our product candidates might fail to meet their primary endpoints in clinical trials, meaning that we will not have the clinical data required to support full regulatory approvals.

•The regulatory pathway for our COVID-19 Vaccine is continually evolving, and such evolution may result in unexpected or unforeseen challenges.

•We have conducted, are conducting, and plan to conduct in the future, a number of clinical trials for our COVID-19 Vaccine at sites outside the U.S. and the U.S. FDA may not accept data from trials conducted in such locations.

•The later discovery of previously unknown problems with a product, manufacturer, or facility may result in restrictions, including withdrawal of a vaccine that had previously received regulatory approval in certain jurisdictions from the market.

•Our success depends on our ability to maintain the proprietary nature of our technology.

•Our business may be adversely affected if we do not successfully execute our business development initiatives.

•Given our current cash position and cash flow forecast, and significant uncertainties related to 2024 revenue, substantial doubt exists regarding our ability to continue as a going concern through one year from the date that the financial statements included in this Annual Report were issued.

•Servicing our 5.00% convertible senior unsecured notes due 2027 requires a significant amount of cash, and we may not have sufficient cash flow resources to pay our debt.

•Because our stock price has been and will likely continue to be highly volatile, the market price of our common stock may be lower or more volatile than expected.

•Litigation or regulatory investigations could have a material adverse impact on our results of operation and financial condition.

•We or the third parties upon whom we depend may be adversely affected by natural or man-made disasters or public health emergencies, such as the COVID-19 pandemic.

Our expenses have exceeded our revenue since our formation in 1987, and our accumulated deficit at December 31, 2023 was $4.8 billion. Our revenue and expenses fluctuate significantly from period to period. For most of our history our expenses have exceeded our revenue, which may occur during most periods in the foreseeable future. Our net losses for the last three fiscal years were $0.5 billion in 2023, $0.7 billion in 2022, and $1.7 billion in 2021.

Historically, our losses have resulted predominantly from research and development expenses for our vaccine candidates, manufacturing-related expenses, expenses associated with efforts to obtain regulatory approvals, costs related to protection of our intellectual property, and other general and administrative operating expenses, a significant portion of which have been noncash. Our expenses have exceeded our revenue since inception, and we believe our expenses will fluctuate over time, and may substantially increase in some years, as a result of continuing efforts to develop, test, manufacture, and make regulatory filings for our vaccine candidates, and commercialize our COVID-19 Vaccine and any other product candidates that receive requisite regulatory approvals.

As of the end of fiscal year 2023, our investment in the development and manufacture of our COVID-19 Vaccine has been substantial, and we expect such levels of investment to continue for the rest of 2024 and beyond, although the precise magnitude of our total investment will depend on the duration of the impact of COVID-19, the competitive landscape, the timing and results of our applications for regulatory approvals, the availability of funding, and whether and what booster shot protocols are recommended by governments, regulatory authorities, and healthcare providers. If we are unable to timely commercialize a vaccine against COVID-19 in sufficient jurisdictions, we likely would never recoup our investments.

We expect to continue to incur significant operating expenses and anticipate significant losses over time as we seek to:

•conduct additional clinical trials and continue to seek regulatory approvals for our COVID-19 Vaccine and other potential vaccine candidates;

•conduct preclinical studies for other potential vaccine candidates;

•expand our global manufacturing and distribution capacity, and further commercialize our COVID-19 Vaccine; and

•maintain, expand and protect our intellectual property portfolio.

As a result, we expect our cumulative operating losses to increase until such time, if ever, that product sales, licensing fees, royalties, milestones, contract research and other sources generate sufficient revenue to fully fund our operations. We may never achieve profitability and may not sustain profitability, if achieved.

We do not currently generate sufficient revenue from product sales, licensing fees, royalties, milestones, contract research or other sources to fully fund our operations. We, therefore, will use our cash resources, and expect to require additional funds, to maintain our operations, continue our research and development programs, advance preclinical studies and clinical trials, seek regulatory approvals and manufacture and market our COVID-19 Vaccine and any other product candidates that are approved for commercialization.

To date, we have financed our operations primarily through the sale of equity and debt securities, government funding and grant agreements, and supply agreements (also sometimes referred to as advance purchase agreements) for our COVID-19 Vaccine. Although we have entered into supply agreements for our COVID-19 Vaccine that include prepayments from the purchasers, until we can generate sufficient product revenue from such agreements to fully fund our operations, which we may never do, we expect to finance our cash needs through a combination of additional public or private equity or debt financings, as well as existing cash, potential collaborations, strategic alliances and marketing, distribution or licensing arrangements, funding from governmental and non-governmental funding entities, and potentially other sources. While we may continue to apply for contracts or grants from academic institutions, non-profit organizations and governmental entities, we may not be successful. Adequate additional funding may not be available to us on favorable terms, or at all. Furthermore, negative interpretations of clinical trial data or setbacks, or perceived setbacks, with respect to manufacturing ability and/or capacity or regulatory filing timelines for our COVID-19 Vaccine or our other vaccine candidates, as well as the competitive landscape posed by other COVID-19 vaccines, may impair our ability to raise additional financing on favorable terms, or at all. Additionally, under certain supply agreements, if we do not timely achieve requisite regulatory milestones for our COVID-19 Vaccine in the relevant jurisdictions, obtain supportive recommendations from governmental advisory committees, and/or achieve product volume or delivery timing obligations, purchasers may seek to terminate such agreements, reduce their purchase commitments, require us to refund all or some prepayments we have received, or renegotiate such agreements. If we cannot raise the additional funds required for our anticipated operations, we may be required to delay significantly, reduce the scope of or eliminate one or more of our research or development programs, downsize our organization, or seek alternative measures to avoid insolvency, including arrangements with collaborative partners or others that may require us to relinquish rights to certain of our technologies or vaccine candidates. If we raise additional funds through future offerings of shares of our common stock or other securities, such offerings would cause dilution of current stockholders’ percentage ownership in the Company, which could be substantial. Future offerings also could have a material and adverse effect on the price of our common stock.

Generally, worldwide economic conditions remain uncertain, particularly due to the impact of increased interest rates, and inflation. In addition, our operations and performance may be affected by political or civil unrest or military action, including the ongoing conflicts between Russia and Ukraine and Israel and Hamas as well as hostilities elsewhere in the Middle East.

Access to capital markets is critical to our ability to operate. Traditionally, biotechnology companies have funded their research and development expenditures by raising capital in the equity markets. Declines and uncertainties in these markets in the past have severely restricted raising new capital and have affected companies’ ability to continue to expand or fund existing development, manufacturing, regulatory and commercialization efforts. We require significant capital for our current and expected operations. The general economic and capital market conditions, both in the U.S. and worldwide, have been volatile in the past and at times have adversely affected our access to capital and increased the cost of capital. The capital and credit markets may not be available to support future capital raising activity on favorable terms. If economic conditions decline, our future cost of equity or debt capital and access to the capital markets could be adversely affected. In addition, if we are unable to access the capital markets on favorable terms, our ability to execute our business plan as contemplated would be compromised. Moreover, we rely and intend to rely on third parties, including clinical research organizations, contract manufacturing organizations and other important vendors and consultants. Global economic conditions may result in a disruption or delay in the performance of our third-party contractors and suppliers. If such third parties are unable to adequately satisfy their contractual commitments to us in a timely manner, our business could be adversely affected.

Our funding agreements with the U.S. government (“USG”) and CEPI each reimburse a portion of the expenses associated with the development and commercialization of our COVID-19 Vaccine. To the extent funding commitments in such agreements are conditioned on our meeting certain milestones or conditions, we may not ultimately receive the full amount of committed funds and may require additional funding to support our COVID-19 Vaccine development and commercialization activities, and we may be unable to timely obtain additional funding. For example, in July 2021, in connection with funding from the USG partnership formerly known as Operation Warp Speed, the USG instructed us to prioritize alignment with the FDA on our analytic methods before conducting additional U.S. manufacturing, and the USG indicated that it would not fund additional U.S. manufacturing until such alignment was reached, which did not occur until June 2022. In February 2023, in connection with the execution of Modification 17 to the USG Agreement, the U.S. government indicated to us that the award may not be extended past its current period of performance. The USG Agreement also includes provisions giving the USG termination rights based on a determination that the funded project will not produce beneficial results commensurate with the expenditure of resources and that termination would be in the USG’s interest. Such a determination would result in the loss of funding under that agreement and could result in other actions by the USG. The CEPI funding agreement, meanwhile, provides CEPI certain “march-in” rights in the event of certain breaches of that agreement. Additionally, we have entered into, and plan to continue entering into, supply agreements (also sometimes referred to as advance purchase agreements) for our COVID-19 Vaccine that include prepayments from the purchasers to help fund our development and manufacture of the vaccine. Under certain supply agreements, if we do not timely achieve requisite regulatory milestones for our COVID-19 Vaccine in the relevant jurisdictions, obtain supportive recommendations from governmental advisory committees, and/or achieve product volume or delivery timing obligations, purchasers may seek to terminate such agreements, reduce their purchase commitments, require us to refund all or some prepayments we have received, or renegotiate such agreements, each of which could have a material and adverse effect on our financial condition. The timing to fulfill performance obligations related to supply agreements will depend on timing of product manufacturing, receipt of marketing authorizations for additional indications, delivery of doses based on customer demand, and the ability of the customer to request variant vaccine in place of prototype vaccine under certain of our supply agreements. The supply agreements typically contain terms that include upfront payments intended to assist us in funding investments related to building out and operating our manufacturing and distribution network, among other expenses, in support of our global supply commitment, and are applied to billings upon delivery of COVID-19 Vaccine. Such upfront payments generally become non-refundable upon our achievement of certain development, regulatory and commercial milestones. We may not achieve such milestones, which could have a material and adverse effect on our financial condition. For example, in September 2022, following a delay in obtaining regulatory approval in the United Kingdom, we entered into the Amended and Restated UK Supply Agreement, which amended and restated in its entirety the Original UK Supply Agreement, which reduced the volume of vaccine doses that the Authority is committed to purchase as compared to the Original UK Supply Agreement. Under the terms of the Amended and Restated UK Supply Agreement, the Authority agreed to purchase a minimum of 1 million doses and up to an additional 15 million doses (the “Conditional Doses”) of our prototype vaccine, with the number of Conditional Doses contingent on, and subject to reduction based on, our timely achievement of supportive recommendations from the JCVI that is approved by the UK Secretary of State for Health. If the Authority did not purchase the Conditional Doses or the number of such Conditional Doses was reduced below 15 million doses of our prototype vaccine, we would have to repay up to $225.0 million related to the upfront payment previously received from the Authority under the Original UK Supply Agreement.

Under the Amended and Restated UK Supply Agreement, the Authority also has the option to purchase up to an additional 44 million doses, in one or more tranches, through 2024.

As of November 30, 2022, the JCVI had not made a supportive recommendation with respect to our prototype vaccine, thereby triggering, under the terms of the Amended and Restated UK Supply Agreement, (i) a reduction of the number of Conditional Doses from 15 million doses to 7.5 million doses, which reduced number of Conditional Doses are contingent on, and subject to further reduction based on, our timely achievement by November 30, 2023 of a supportive recommendation from JCVI that is approved by the UK Secretary of State for Health as described in the paragraph above, and (ii) an obligation for us to repay $112.5 million related to the upfront payment previously received from the Authority under the Original UK Supply Agreement. In April 2023, we repaid the $112.5 million related to the November 30, 2022 triggering event. As of November 30, 2023, the JCVI had not made a supportive recommendation with respect to the prototype vaccine, thereby triggering a reduction in the number of Conditional Doses from 7.5 million doses to zero. As of February 2024, the Company is in discussions with the Authority regarding the treatment of the remaining upfront amount previously received of $112.5 million, which is reflected in Other current liabilities on our consolidated balance sheet.

In July 2023, we amended the Australia APA to provide for replacement doses and to extend the delivery schedule through 2025. As of February 2024, we had not yet received TGA authorization or delivered doses as contemplated in the July 2023 amendment and are in active discussions with the Australian government on both the TGA authorization and delivery of the doses previously scheduled for the fourth quarter of 2023. In February 2024, we received notice from the Australian government purporting to cancel its order for such prototype vaccine doses. We believe the cancellation was not proper under the amended Australia APA. However, if such a cancellation were determined to be allowable, $6.0 million of the deferred revenue would become a credit towards future deliveries of doses and approximately $48 million of the contract value related to future deliverables would no longer be available.

In April 2023, we amended the Canada APA, pursuant to which the Canadian government forfeited certain doses originally scheduled for delivery in 2022 for a payment of $100.4 million, which we received in the second quarter of 2023. In June 2023, we entered into an additional amendment (the “June 2023 Amendment”) to the Canada APA. Pursuant to the June 2023 Amendment, (i) the Canadian government forfeited certain doses of COVID-19 Vaccine previously scheduled for delivery and agreed to pay a total amount of $349.6 million to us in two equal installments, which total amount equaled the remaining balance owed by the Canadian government with respect to such forfeited vaccine doses, (ii) the amount of doses of COVID-19 Vaccine due for delivery was reduced, (iii) the delivery schedule for the remaining doses of COVID-19 Vaccine to be delivered was revised, and (iv) the parties agreed Novavax would use the Biologics Manufacturing Centre (“BMC”) Inc. to produce bulk antigen for doses in 2024 and 2025. The June 2023 Amendment maintained the total contract value of the original Canada APA. The first installment of $174.8 million was payable upon execution of the June 2023 Amendment and received by Novavax in July 2023, and the second installment of $174.8 million was contingent and payable upon the delivery of vaccine doses in the second half of 2023 and received by Novavax in January 2024. The Canadian government may terminate the Canada APA, as amended, if we fail to receive regulatory approval for our COVID-19 Vaccine using bulk antigen produced at BMC on or before December 31, 2024. Our 2024 plans do not currently anticipate the submission for regulatory approval of our COVID-19 Vaccine using bulk antigen produced at BMC, and we plan to work with the Canadian government on an amendment that addresses possible alternatives, which may not be achievable. As of December 31, 2023, $102.8 million was classified as short-term Deferred revenue and $485.3 million was classified as long-term Deferred revenue with respect to the Canadian APA on our consolidated balance sheet. If the Canadian government terminates the Canada APA, $28.0 million of the deferred revenue would become refundable and approximately $224 million of the contract value related to future deliverables would no longer be available (see Note 3 to our consolidated financial statements). As a result, our existing funding and supply agreements or our advance purchase agreements do not assure success of our vaccine candidates and may be insufficient to fully fund the development and commercialization of our vaccine candidates, our vaccines or our company operations and if we are unable to satisfy the performance obligations under such agreements the agreements may be terminated, the purchase commitments may be reduced or we may be required to refund advance payments.

Our vaccine development efforts depend on new, rapidly evolving technologies and on the marketability and profitability of our products. Our development efforts and, if those are successful, commercialization of our COVID-19 Vaccine and our other vaccines could fail for a variety of reasons, including if:

•our recombinant nanoparticle vaccine technologies, any or all of the products based on such technologies or our proprietary manufacturing process prove ineffective or unsafe;

•new strains of COVID-19 evolve, with respect to which our COVID-19 Vaccine proves less effective;

•we or our third-party manufacturer facilities fail to reproducibly scale-up and maintain manufacturing with sufficiently high yields at reasonable cost and on projected timelines, or such manufacturing fails to generate product that consistently satisfies purity, potency, quality, stability, and shelf-life standards necessary for obtaining regulatory approvals or achieving commercial viability;

•the products are uneconomical to market or manufacture;

•some or all of the products that we or our third-party partners have manufactured may be determined to be unsalable based on criteria imposed by regulators as they complete regulatory approvals;

•our in-house or third-party manufacturing facilities fail regulatory inspections;

•proprietary rights of third-parties prevent us or our collaborators from exploiting technologies, and manufacturing or marketing products; or

•third-party competitors achieve and maintain greater market share due to earlier approvals or superior marketing capabilities.

In response to the outbreak of COVID-19, we began pursuing, and continue to pursue, the development and manufacture of our COVID-19 Vaccine. Even though we have reported positive data from Phase 1, 2 and 3 clinical trials, and we and our partners have received either provisional registration, conditional marketing authorization, emergency use authorization, or full approval from the World Health Organization and in several jurisdictions, such results may not be sufficient to support regulatory submissions, authorizations and approvals, accelerated or otherwise, in any other relevant jurisdictions on our projected timelines, if at all.

Additionally, even though our COVID-19 Vaccine has received regulatory authorizations in certain jurisdictions and may receive further regulatory approval in others, successful commercialization depends on our ability to effectively scale up and maintain manufacturing capabilities at our own locations and those of our manufacturing partners and contractors. In May 2020, we acquired Novavax CZ (formerly Praha Vaccines, a.s.) including its vaccine manufacturing facility in Bohumil, Czech Republic and approximately 150 of its employees but we have yet to receive regulatory approval at this site. We also are actively entering into agreements with third parties to manufacture the antigen component of COVID-19 Vaccine and our proprietary Matrix-M™ adjuvant, as well as to distribute our COVID-19 Vaccine. Because of contractual restraints and the limited number of third-party manufacturers with the relevant expertise, required regulatory approvals and facilities to manufacture our COVID-19 Vaccine and its components at commercial scale, replacement of a manufacturer may be expensive and time-consuming and may cause interruptions in production. Manufacturing of our COVID-19 Vaccine and its components involves a complicated process that will require significant investments of time and financial resources to implement, and our efforts to establish and maintain manufacturing capabilities may not meet expectations as to timing, scale-up, reproducibility, yields, purity, cost, potency or quality. Shortages of raw materials and supplies also negatively impact our manufacturing efforts.

We may not be able to timely and effectively produce or receive regulatory approvals for our COVID-19 Vaccine in adequate quantities to address global demand.

We have limited experience with the commercial launch of vaccine products. In addition to scaling up our manufacturing capabilities, we need to develop global distribution channels and form partnerships with third parties worldwide, as well as hire, train and integrate additional management, administrative and sales and marketing personnel. Rapid and significant growth may strain our administrative and operational infrastructure, imposing significant additional responsibilities on our organization, and our efforts to establish and maintain these capabilities may not meet expectations as to timing, scale-up, reproducibility, yields, purity, cost, potency or quality. If we fail to successfully manage our growth and the increased complexity of our operations, our business, financial position, results of operations and prospects may be materially and adversely affected.

Our prototype vaccine was a monovalent vaccine developed based upon the genetic sequence of the SARS-CoV-2 virus that was first discovered in December 2019. Our updated vaccine is a monovalent vaccine developed based upon the XBB.1.5 strain for the fall 2023 COVID-19 Vaccine season. As the SARS-CoV-2 virus continues to evolve, new strains of the virus, or those that are already in circulation, may prove more transmissible or cause more severe forms of COVID-19 disease than the predominant strains to date. For example, Alpha, Beta, Delta and Omicron (including subvariants such as XBB.1.5 and JN.1) variants have been observed to be more transmissible, or contagious, than previous variants.

Our COVID-19 Vaccine may not be as effective in protecting against these or other future variant strains. Additionally, we expect the demand for bivalent vaccines to continue to increase, which may negatively impact the demand, particularly in the U.S., for our COVID-19 Vaccine and would likely require significant expenditures by the Company to successfully market a bivalent formulation, particularly in the U.S. Our COVID-19 Vaccine may fail to achieve market acceptance or significant sales, despite gaining regulatory approval, provisional registration, conditional marketing authorization or emergency use authorization in a number of jurisdictions, including emergency use authorization the U.S., as demand for variant-specific or bivalent vaccines increases. We have several variant-specific vaccine candidates in development, including for Omicron subvariants and may develop others in the future. However, if these efforts are unsuccessful, these candidates do not receive regulatory approvals expeditiously, we are slower to develop variant-specific or bivalent vaccines than competitors, these vaccine candidates prove less effective than competitors’ vaccines, or we are unable to successfully manufacture, distribute or market such vaccine candidates once approved, these shortcomings may lead to reputational harm, loss of market share, and adverse financial results.

Our 2024 revenue depends on our ability to successfully develop, manufacture, distribute, or market an updated monovalent or bivalent formulation of a vaccine candidate for COVID-19 in a single dose vial or pre-filled syringe for the fall 2024 COVID vaccine season, which is inherently uncertain and subject to a number of risks, including regulatory approval. We experienced delays in early 2023 in manufacturing our BA.5 clinical trial materials, which delayed regulatory approval from the U.S. FDA for our vaccine candidate for the fall 2023 COVID vaccine season.

Further, counterparties to certain of our existing supply agreements may request variant-specific vaccines in place of our COVID-19 Vaccine and, depending on when we are able to offer such variant-specific vaccines, if at all, such counterparties may seek to delay, reduce or otherwise renegotiate their purchase commitments, which may adversely impact our ability to realize the full financial benefit of such supply agreements. In addition, we may expend significant resources adapting our COVID-19 Vaccine or conducting clinical trials to protect against variants of the SARS-CoV-2 virus, but a market for this adapted vaccine may not develop and demand may not align with our projections or cost expenditures.

We focus our research and development activities on vaccines, an area in which we believe we have particular strengths and a technology that appears promising. The outcome of any research and development program is highly uncertain. Only a small fraction of biopharmaceutical development programs ultimately result in commercial products or even product candidates and a number of events could delay our development efforts and negatively impact our ability to make regulatory submissions or obtain regulatory approval for, and to manufacture, market and sell, our COVID-19 Vaccine or any other vaccine on our projected timelines, if at all.

Vaccine candidates that initially appear promising often fail to yield successful products, and we may not ultimately be able to demonstrate the safety, potency, purity, stability and efficacy necessary to obtain or maintain regulatory authorization to market our product candidates. In many cases, preclinical studies or clinical trials will show that a product candidate is not efficacious or that it raises safety concerns or has other side effects that outweigh its intended benefit. Success in preclinical or early clinical trials may not translate into success in large-scale clinical trials. Further, success in clinical trials often leads to increased investment, accelerating cumulative losses. Even if clinical trial results appear positive, regulatory approval may not be obtained if the U.S. FDA, or a foreign equivalent, does not agree with our interpretation of the results, and we may face challenges when scaling-up the production process to commercial levels. Even after a product is approved and launched, general usage or post-marketing clinical trials may identify safety or other previously unknown problems with the product, or manufacturing issues may emerge, either of which may result in regulatory approvals being suspended, limited to narrow the scope of the approval, or revoked, which may otherwise prevent successful commercialization. Intense competition in the vaccine industry could also limit the successful commercialization of any products for which we receive commercial approval.

We will require approval from the U.S. FDA of any name we intend to use for our products regardless of whether we have secured a trademark registration from the USPTO. The U.S. FDA typically conducts a review of proposed product names, including an evaluation of potential for confusion with other product names. The U.S. FDA may object to any product name we submit if it believes the name inappropriately implies medical claims. If the U.S. FDA objects to any of our proposed product names, we may be required to adopt an alternative name for our proposed products. If we adopt an alternative name, we would lose the benefit of any existing trademark applications for such developmental candidate and may be required to expend significant additional resources in an effort to identify a suitable product name that would qualify under applicable trademark laws, not infringe the existing rights of third parties and be acceptable to the U.S. FDA. We may be unable to build a successful brand identity for a new trademark in a timely manner or at all, which would limit our ability to commercialize our products, if approved.

We are highly dependent on third-party organizations to conduct some of our laboratory testing and clinical trials and a significant amount of our vaccine manufacturing activities and distribution. If we are unable to obtain any necessary services on acceptable terms, we may not complete our product development or commercialization efforts in a timely manner. We may lose control over these activities or become too dependent upon these parties. These third parties may not complete testing, manufacturing or distribution activities on schedule, or in satisfaction of regulatory or commercial requirements. In particular, we currently depend significantly on SIIPL and SLS for co-formulation, filling, and finishing our COVID-19 Vaccine (except in Europe, where we rely on PCI Pharma Services (“PCI”)). If SLS or PCI is unable to provide sufficient co-formulation, fill, and finish services to us, fails to meet regulatory requirements, or otherwise defaults on its obligations to us, we may not be able to obtain alternative co-formulation, fill, and finish services from other providers on acceptable terms in a timely manner or at all, which could prevent or delay delivery of customer orders, or otherwise negatively affect our business. Certain of our facilities are also contracted for defined time frames and through association with USG and CEPI, and we may not be able to access those facilities for sufficient periods of time to provide adequate supply.

We are responsible for confirming that each of our clinical trials is conducted in accordance with its general investigational plan and protocol. Moreover, the U.S. FDA and foreign regulatory agencies require us to comply with regulations and standards, commonly referred to as good clinical practices, for conducting, recording and reporting the results of clinical trials to assure that data and reported results are credible and accurate and that the rights, safety and welfare of clinical trial participants are adequately protected. The U.S. FDA and foreign regulatory agencies also require us to comply with good manufacturing practices. Our reliance on third parties does not relieve us of these responsibilities and requirements. These third parties may not successfully carry out their contractual duties or regulatory obligations. Furthermore, if a third-party manufacturer is producing materials or products for themselves or other companies, that manufacturer is exposed to regulatory risks for the production of such materials and products. As a result, failure to meet the regulatory requirements for the production of those materials and products may generally affect the regulatory status of the third-party manufacturer’s facility, which could impact its ability to produce our materials and products. Any of our third-party service providers may need to be replaced, the quality or accuracy of the data they obtain may be compromised, the services provided to us may be delayed, or the product they manufacture may be contaminated and unusable due to the failure to adhere to our clinical and manufacturing protocols, regulatory requirements or for other reasons.

In any such event, our preclinical development activities or clinical trials may be extended, delayed, suspended or terminated, and we may not be able to obtain regulatory approval of, or successfully commercially manufacture on a timely basis, our vaccine candidates.

The administration of drugs or vaccines to humans, whether in clinical trials or after marketing approval, can result in product liability claims. We maintain product liability insurance coverage for our current clinical programs, including our NVX-CoV2373 and NVX-CoV2601 trials, and for commercialization of our updated vaccine. However, we may not be able to obtain additional insurance coverage or maintain insurance coverage on commercially reasonable terms, at a reasonable cost or in sufficient amounts to protect us against losses due to liability. Furthermore, such insurance coverage and our resources may not be sufficient to satisfy all liabilities that result from product liability claims. A successful claim may prevent us from obtaining adequate product liability insurance in the future on commercially desirable terms, if at all. Even if a claim is not successful, defending such a claim would be time- consuming and expensive, may damage our reputation in the marketplace and would likely divert management’s attention.

In addition, because we are developing our COVID-19 Vaccine in response to the outbreak of COVID-19, a global pandemic, we have received either provisional registration, conditional marketing authorization, emergency use authorization, or full approval from the World Health Organization and various jurisdictions, and we have a widely used vaccine as an investigational vaccine or a product authorized for temporary or emergency use prior to our receipt of marketing approval in other jurisdictions as well. Unexpected safety issues in these circumstances could lead to product liability claims and our existing insurance may not be adequate for such claims.

Regardless of merit or eventual outcome, liability claims may result in:

•decreased demand for our products;

•withdrawal of regulatory authorizations and approvals;

•voluntary or mandatory recalls of our products;

•necessity for additional nonclinical or clinical studies, changes in labeling, or changes to manufacturing processes, specifications and/or facilities;

•impairment of our business reputation and negative media attention;

•withdrawal of clinical trial participants;

•costs of related litigation;

•substantial monetary awards to participants or other claimants;

•loss of revenue; and

•inability to commercialize our vaccine candidates.

In the U.S., the PREP Act, when applicable, provides immunity for manufacturers from all claims under state or federal law for “loss” arising out of the administration or use of a “covered countermeasure.” However, injured persons may still bring a suit for “willful misconduct” against the manufacturer under some circumstances. “Covered countermeasures” include security countermeasures and “qualified pandemic or epidemic products”, including products intended to diagnose or treat pandemic or epidemic disease, such as pandemic vaccines, as well as treatments intended to address conditions caused by such products. For these immunities to apply, the Secretary of DHHS must invoke the PREP Act by issuing a declaration that a public health emergency or “credible risk” of a future public health emergency exists. Such a PREP Act declaration is separate from other declarations such as a PHE or EUA declaration and, among other things, defines the scope and duration of the PREP Act immunities.

On March 17, 2020, the Secretary of DHHS issued a declaration under the PREP Act and has issued subsequent amendments thereto to provide liability immunity for activities related to certain countermeasures against the evolving effects of COVID-19. The current declaration will end on December 31, 2024, unless it is renewed. While we believe our products are covered under the current PREP Act declaration, this cannot be assured. Also, the Secretary of the DHHS may not make other declarations in the future that cover any of our other product candidates, and the U.S. Congress may reduce coverage under the PREP Act or repeal it altogether. Product liability lawsuits may result in substantial liabilities and may require us to limit commercialization of our product candidates.

We are continuing to pursue the manufacture, distribution and clinical testing of our COVID-19 Vaccine for commercialization. Completion of our clinical trials and commercialization of our COVID-19 Vaccine and our other vaccine candidates requires access to, or development of, facilities to effectively manufacture our COVID-19 Vaccine and our other vaccine candidates at sufficient yields and at commercial-scale. We have limited experience manufacturing any of our vaccine candidates in the volumes necessary to support commercial sales. While we have increased our global manufacturing capacity for our COVID-19 Vaccine, our efforts to establish and maintain manufacturing capabilities may not meet expectations as to timing, scale-up, reproducibility, yields, purity, cost, potency or quality. We are highly dependent on third-party organizations to conduct a significant amount of our vaccine manufacturing activities. We do not have sufficient internal manufacturing infrastructure to support global commercialization of our COVID-19 Vaccine and we have entered into third-party agreements for the components, as well as for commercial fill-finish manufacturing, for our COVID-19 Vaccine. The antigen component of our COVID-19 Vaccine is currently being manufactured at SIIPL in India, and the Matrix-MTM adjuvant component of our COVID-19 Vaccine is currently being manufactured at Novavax AB as well as our partnered manufacturing site at AGC Biologics in Europe. Challenges in manufacturing either the antigen component or the adjuvant, or issues in later manufacturing stages, could compromise production of our COVID-19 Vaccine. Additionally, we currently depend substantially on SIIPL and SLS for co-formulation, filling, and finishing our COVID-19 Vaccine (other than in Europe) and PCI for finishing in Europe, and any delays or disruptions in these suppliers’ operations could prevent or delay the delivery of customer orders.

Additionally, to ensure adequate inventory supply and manage our operations, we forecast anticipated manufacturing requirements and customer demand to predict inventory needs and place orders with our third-party manufacturers based on such predictions. Our ability to accurately forecast demand for our COVID-19 Vaccine could be negatively affected by many factors, including challenges in managing our commercial strategy, unanticipated changes in general market conditions or regulatory matters, and market demand for variant-specific COVID-19 vaccines, among others. If we underestimate our third-party manufacturing requirements, we may not be able to timely meet obligations under our customer supply agreements. Conversely, if we overestimate our third-party manufacturing requirements, we may end up with inventory levels in excess of customer demand that result in a portion of our inventory becoming obsolete or expiring, as well as inventory write-downs or write-offs, or we may need to cancel previously forecasted batches of product from our third-party manufacturers, which may result in material cancellation fees. In September 2022, for example, we entered into a Confidential Settlement Agreement and Release with FUJIFILM under which we are responsible for up to $185 million to FUJIFILM in connection with the termination of manufacturing activity. In December 2022, we agreed to approximately $95 million in fees owed to AGC Biologics in connection with the cancellation of batches in 2022. If we are unable to accurately forecast demand for our COVID-19 Vaccine and the required services from third-party manufacturers, our results of operations could be materially harmed.

Manufacturing our COVID-19 Vaccine and our other vaccine candidates involves a complicated process with which we have limited experience. If we and our third-party manufacturers are unable to manufacture our COVID-19 Vaccine and our other vaccine candidates in clinical quantities or, if and when necessary, in commercial quantities and at sufficient yields and at required specifications, then clinical trials and commercialization will be delayed, and we will need to identify and reach supply arrangements with additional third parties. Third-party manufacturers also must receive U.S. FDA or equivalent foreign regulatory body approval before they can produce clinical material or commercial product which could cause delays and alter our production schedule. Our COVID-19 vaccines are in competition with other products for access to these third-party facilities and may be subject to delays in manufacture if third parties prioritize other products. We may not be able to enter into any necessary additional third-party manufacturing arrangements on acceptable terms, or on a timely basis. In addition, we have to enter into technical transfer agreements and share our know-how with the third-party manufacturers, which can be time-consuming and may result in delays.

Because of contractual restraints and the limited number of third-party manufacturers with the expertise, required regulatory approvals and facilities to manufacture bulk vaccines at commercial-scale, replacement of a manufacturer may be expensive and time-consuming and may cause interruptions in the production of our vaccine and negatively impact our ability to timely meet obligations under our customer supply agreements. We and our third-party manufacturers may also encounter production challenges related to:

•costs, scale up, and yields;

•shortages of raw materials and supplies;

•shipment delays or other supply chain disruptions

•quality control and assurance;

•contamination, lot consistency, potency, and purity;

•shortages of qualified personnel and other capacity constraints;

•compliance with strictly enforced and evolving federal, state and foreign regulations that vary in each country where products might be sold including nationalization or other territory restrictions placed on our owned and third-party manufacturing sites; and

•capital funding.

Delays or interruptions could have a material adverse effect on our business, financial condition, results of operations and cash flows.

The near and long-term viability of our vaccine candidates depend in part on our ability to successfully establish new strategic collaborations with pharmaceutical and biotechnology companies, non-profit organizations and government agencies. Establishing strategic collaborations and obtaining government funding is difficult and time-consuming. Potential collaborators may reject collaborations based upon their assessment of our financial, regulatory or intellectual property position or based on their internal pipelines; government agencies may reject contract or grant applications based on their assessment of public need, the public interest, our products’ ability to address these areas, or other reasons beyond our expectations or control. Collaborators also may seek to modify or terminate relationships. Past success in establishing strategic collaborations with pharmaceutical and biotechnology companies, non-profit organizations and government agencies in the past is no guarantee of future success in entering into new relationships or in performing under existing relationships. If we fail to establish a sufficient number of collaborations or government relationships on acceptable terms, or fail to perform under collaborations or relationships to the satisfaction of counter-parties, we may not be able to commercialize our vaccine candidates or generate sufficient revenue to fund further research and development efforts.

The collaborations we have established or may establish may not result in the successful development or commercialization of any vaccine candidates for several reasons, including the fact that:

•we may not have the ability to control the activities of our partners and cannot provide assurance that they will fulfill their obligations to us, including with respect to the license, development and commercialization of vaccine candidates, in a timely manner or at all;

•such partners may not devote sufficient resources to our vaccine candidates or properly maintain or defend our intellectual property rights;

•our partners could independently develop, or develop with third parties, products that compete directly or indirectly with our vaccine candidates if such partners believe that competitive products are more likely to be successfully developed or can be commercialized under terms that are more economically attractive than ours;

•any failure on the part of our partners to perform or satisfy their obligations to us could lead to delays in the development or commercialization of our vaccine candidates and affect our ability to realize product revenue; and

•disagreements, including disputes over the ownership of technology developed with such collaborators, could result in litigation, which would be time consuming and expensive, and may delay or terminate research and development efforts, regulatory approvals and commercialization activities.

If we or our collaborators fail to maintain our existing agreements or in the event we fail to establish agreements as necessary, we could be required to undertake research, development, manufacturing and commercialization activities solely at our own expense. These activities would significantly increase our capital requirements and, given our lack of sales, marketing and distribution capabilities, significantly delay the commercialization of our vaccine candidates.

We are highly dependent on the commercial success of our COVID-19 Vaccine, which is currently our only commercial product and source of product revenues. Whether we make a profit from the sale of our vaccine products is dependent on a number of variables, including the costs we incur manufacturing, testing and releasing, packaging and shipping such vaccine product. Additionally, the CEPI funding agreement necessitates that we allocate a certain number of doses of our COVID-19 Vaccine to certain middle and lower income countries which may impact negatively our ability to generate profit. We cannot predict when, if at all, our approved vaccine products will be profitable to the Company, and, ultimately, we may never generate sufficient revenues from our products to reach or maintain profitability or sustain our anticipated levels of operations.

Our ability to collect revenue from the commercial sale of our vaccines may depend on our ability, and that of any current or potential future collaboration partners or customers, to obtain and if obtained, maintain adequate levels of approval, coverage and reimbursement for such products from third-party payers such as:

•government health administration authorities such as the Advisory Committee for Immunization Practices of the Centers for Disease Control and Prevention;

•private health insurers;

•managed care organizations;

•pharmacy benefit management companies; and

•other healthcare related organizations.

Third-party payers are increasingly challenging the prices charged for medical products and may deny coverage or offer inadequate levels of reimbursement if they determine that a product has not received appropriate clearances from the U.S. FDA, or foreign equivalent, or other government regulators; is not used in accordance with cost-effective treatment methods as determined by the third-party payer; or is experimental, unnecessary or inappropriate. Prices could also be driven down by managed care organizations that control or significantly influence utilization of healthcare products.

In both the U.S. and some foreign jurisdictions, there have been a number of legislative and regulatory proposals and initiatives to change the health care system in ways that could affect our ability to sell vaccines and could adversely affect the prices that we receive for our vaccine candidates, if approved. Some of these proposed and implemented reforms could result in reduced drug pricing or reimbursement rates for medical products, and while we have no current vaccines available for commercial sale other than subject to provisional registration, conditional marketing authorization or emergency use authorization in certain foreign jurisdictions, the impact of such reform could nevertheless adversely affect our business strategy, operations and financial results. Our exposure to price-related regulation could depend on whether our products are reimbursed by Medicare under Part B or Part D. Medicare Part B vaccine coverage includes vaccines to prevent influenza, pneumococcal disease, hepatitis B for beneficiaries who are at medium or high risk, and COVID-19. Vaccines for such conditions do not have any cost-sharing requirements. Meanwhile, Medicare Part D vaccine coverage includes all other commercially available vaccines that are determined to be reasonable and necessary to prevent illness. Part D vaccine coverage historically included cost-sharing requirements, but, effective January 1, 2023, the IRA provides access to CDC and ACIP-recommended vaccines covered under Medicare Part D without cost-sharing.

Since the beginning of the COVID-19 pandemic, the U.S. federal government has been the predominant purchaser of COVID-19 vaccines, making it possible for population-wide access to vaccinations. This population-wide access may change as the pandemic moves past the crisis phase and the market transitions to a third‐party reimbursement model. This transition to a more traditional third‐party reimbursement model is not tied to the ending of the PHE and in part reflects the fact that the U.S. federal government has not received additional funds from Congress to continue to purchase more vaccines. As federal funding declines for COVID-19 vaccines, the USG will most likely transition to standard commercial purchasing through different health care system channels, including commercial insurers and pharmacy benefit managers, and consequently shift the cost of COVID-19 vaccines to insurers and patients (in the form of premiums and out-of-network costs). With respect to the government health care programs and commercial insurance, there may no longer be blanket coverage of COVID-19 vaccines without, in certain instances, accompanying conditions of reimbursement, such as the institution of prior authorization protocols. Medicare (including traditional Medicare and Medicare Advantage) will continue to pay for vaccinations in full; effective January 1, 2023, all Medicare Part D plans are required to cover all adult vaccines recommended by the ACIP, with no cost-sharing, even if the beneficiary is in the deductible phase of the benefit. Provisions in the ARPA and IRA require Medicaid (specifically, with respect to enrollees who receive coverage under traditional Medicaid and all Medicaid medically needy enrollees in specified states) and CHIP programs to cover all ACIP‐recommended vaccines, including COVID‐19 vaccines/boosters with no cost sharing even when the emergency declarations expire and there is no longer any supply of federally purchased vaccines. Under the ACA, people enrolled in non‐grandfathered plans (i.e., the vast majority of people with private insurance) will continue to pay nothing for ACIP‐recommended COVID‐19 vaccines and associated appointments, so long as the enrollee receives this care from an in‐network provider. Even if consumers are guaranteed free access or protected against some costs, they could face access challenges to our product if sufficient amounts of our product are not available compared to that of our competitors or not procured by pharmacies or other providers.

Additionally, the pharmaceutical industry has also been the subject of significant publicity in recent years regarding the pricing of pharmaceutical products, including publicity and pressure resulting from prices charged by pharmaceutical companies for new products as well as price increases by pharmaceutical companies on older products that some people have deemed excessive. As a result, pharmaceutical product prices have been the focus of increased scrutiny by the United States government, including certain state attorneys general, members of Congress, presidential candidates and the United States Department of Justice. If reforms in the health care industry make reimbursement for our potential products less likely, the market for our potential products will be reduced, and we could lose potential sources of revenue. The existence or threat of cost control measures could cause our corporate collaborators to be less willing or able to pursue research and development programs related to our vaccine candidates. Further, it is also possible that additional governmental action is taken in response to the COVID-19 pandemic. We cannot predict the ultimate content, timing or effect of any healthcare reform legislation or the impact of potential legislation on us.

Although we have initiated commercialization of our COVID-19 Vaccine, we currently have limited dedicated sales, marketing or distribution capabilities. As a result, we depend on collaborations with third parties that have established distribution systems and sales forces, including our collaboration with SIIPL, among others. To the extent that we enter into co-promotion or other licensing arrangements, our revenue will depend upon the efforts of third parties, over which we may have little or no control. If we are unable to reach and maintain agreements with one or more pharmaceutical companies or collaborators, we may be required to market our products directly. Developing a marketing and sales force is expensive and time-consuming and could delay a product launch. We may not be able to attract and retain qualified sales personnel or otherwise develop this capability.

Even if we receive full regulatory approvals for the commercial sale of our vaccine candidates, the commercial success of these vaccine candidates will depend on, among other things, their acceptance by physicians, patients and third-party payers, such as health insurance companies and other members of the medical community, as a vaccine and cost-effective alternative to competing products. If our vaccine candidates fail to gain market acceptance, we may be unable to earn sufficient revenue to continue our business. Market acceptance of, and demand for, any product that we may develop and commercialize will depend on many factors, including:

•our ability to provide acceptable evidence of safety and efficacy (including against emerging COVID-19 variants);

•the prevalence and severity of adverse side effects;

•whether our vaccines are differentiated from other vaccines;

•availability, relative cost and relative efficacy of alternative and competing treatments;

•the effectiveness of our marketing and distribution strategy;

•publicity concerning our products or competing products and treatments; and

•our ability to obtain sufficient third party insurance coverage or reimbursement.

If our vaccine candidates do not become widely accepted by physicians, patients, third-party payers and other members of the medical community as well as the relevant public health authorities responsible for scheduling immunizations, our business, financial condition and results of operations could be materially and adversely affected.

Because an important component of our adjuvant technology is extracted from a species of soap-bark tree (Quillaja saponaria) grown in Chile, we need long term access to quillaja extract with a consistent and sufficiently high quality. We need a secure supply of raw material, as well as back-up suppliers, or our adjuvant products may be delayed and we may not be able to meet our obligations under our various collaboration and supply agreements.

We have entered into regional collaborations to develop, manufacture and distribute our vaccine candidates in certain parts of the world, and we anticipate entering into additional regional collaborations. Our relationships with SIIPL, Takeda, and SK bioscience are examples of these regional relationships. These relationships often involve the licensing of our technology to our partner or entering into a distribution agreement, frequently on an exclusive basis. Generally, exclusive agreements are restricted to certain territories. Because we have entered into exclusive license and distribution agreements, larger companies may not be interested, or able, to enter into collaborations with us on a worldwide-scale.

Also, these regional relationships may make us an unattractive target for an acquisition.

Our vaccine candidates are sensitive to storage and handling conditions. Loss in vaccine candidates could occur if the product or product intermediates are not stored or handled properly. It is possible that our vaccine candidates could be lost due to expiration prior to use. If we do not effectively maintain our supply logistics, then we may experience an unusual number of returned or out of date products. Failure to effectively maintain our supply logistics, by us or third parties, could lead to additional manufacturing costs and delays in our ability to supply required quantities for clinical trials or otherwise.

The U.S. FDA and similar foreign governmental authorities have the authority to require the recall of certain vaccine candidates. Manufacturers may, under their own initiative, recall a product if any material deficiency in a product is found. A government-mandated or voluntary recall by us or our strategic collaborators could occur as a result of manufacturing errors, design or labeling defects or other deficiencies and issues. For example, we have extended a credit of $64.7 million under the Australia APA for a single lot of NVX-CoV2373 doses sold to the Australian government that upon pre-planned 6-month stability testing was found to have fallen below the defined specifications, and the lot was therefore removed from the market. Recalls of any of our vaccine candidates would divert managerial and financial resources and have an adverse effect on our financial condition and results of operations. Additionally, a recall announcement could harm our reputation with customers and negatively affect our sales.

The biotechnology and pharmaceutical industries are subject to intense competition and rapid and significant technological change. We have many potential competitors, including major pharmaceutical companies, specialized biotechnology firms, academic institutions, government agencies and private and public research institutions. Many of our competitors have significantly greater financial and technical resources, experience and expertise in:

•research and development;

•preclinical testing;

•designing and implementing clinical trials;

•regulatory processes and approvals;

•production and manufacturing; and

•sales and marketing of approved products.

Principal competitive factors in our industry include:

•the quality and breadth of an organization’s technology;

•management of the organization and the execution of the organization’s strategy;

•the skill and experience of an organization’s employees and its ability to recruit and retain skilled and experienced employees;

•an organization’s intellectual property portfolio;

•the range of capabilities, from target identification and validation to drug discovery and development to manufacturing and marketing; and

•the availability of substantial capital resources to fund discovery, development and commercialization activities.

Large and established companies, such as Merck & Co., Inc., GlaxoSmithKline plc, CSL Ltd., Sanofi Pasteur, SA, Pfizer Inc., Johnson & Johnson, AstraZeneca, and Moderna, among others, compete in the vaccine market. In particular, these companies have greater experience and expertise in securing government contracts and grants to support their research and development efforts, conducting testing and clinical trials, obtaining regulatory approvals to market products, manufacturing such products on a broad scale and marketing approved products.

Regardless of the disease, smaller or early-stage companies and research institutions also may prove to be significant competitors, particularly through collaborative arrangements with large and established pharmaceutical companies. As these companies develop their technologies, they may develop proprietary positions, which may prevent or limit our product development and commercialization efforts. We will also face competition from these parties in recruiting and retaining qualified scientific and management personnel, establishing clinical trial sites and participant registration for clinical trials and in acquiring and in-licensing technologies and products complementary to our programs or potentially advantageous to our business. If any of our competitors succeed in obtaining approval from the U.S. FDA or other regulatory authorities for their products sooner than we do or for products that are more effective or less costly than ours, our commercial opportunity could be significantly reduced.

In order to effectively compete, we will have to make substantial investments in development, testing, manufacturing and sales and marketing or partner with one or more established companies. We may not be successful in gaining significant market share for any vaccine. Our technologies and vaccines also may be rendered obsolete or non-competitive as a result of products introduced by our competitors to the marketplace more rapidly and at a lower cost.

Our COVID-19 Vaccine has moved rapidly through the regulatory review and authorization processes in the U.S. and other jurisdictions. The speed at which COVID-19 vaccines and therapeutics are being created and tested is atypical, and evolving or changing plans or priorities within the U.S. FDA or other regulatory authorities, including changes based on new knowledge of COVID-19 and how the disease, and new variants of the virus, affect the human body, may significantly affect our ability to establish a competitive market share for our COVID-19 Vaccine. A large number of vaccine manufacturers, academic institutions and other organizations have developed COVID-19 vaccines or are developing COVID-19 vaccine candidates. In particular, Moderna, and Pfizer/BioNTech have received full regulatory approvals for their COVID-19 vaccines and, along with Johnson & Johnson have received emergency use authorizations for their COVID-19 vaccines in the U.S. and other countries. All of these companies have obtained the relevant Emergency Use Licenses (“EULs”) from the World Health Organization for their respective vaccines to be supplied to the countries or international coalition partners, including the relevant United Nations agencies, which rely upon the World Health Organization’s EULs to support the local immunization programs. Despite funding provided to us to date, many of our competitors pursuing vaccine candidates have significantly greater product candidate development, manufacturing and marketing resources than we do. Larger pharmaceutical and biotechnology companies have extensive experience in clinical testing and obtaining regulatory approval for their products and may have the resources to heavily invest to accelerate discovery and development of their vaccine candidates. The success of our COVID-19 Vaccine will depend, in part, on its relative safety, efficacy (including against emerging variant strains), side effect profile, convenience, and cost. COVID-19 vaccines approved prior to our vaccine have developed broad market acceptance that we are challenged to overcome. The U.S. FDA has also approved Gilead’s Veklury (remdesivir) for treatment of COVID-19 in both adult and pediatric populations, as well as Eli Lilly’s Olumiant (baricitinib) and Genentech’s Actemra (tocilizumab) for treatment of COVID-19 in certain hospitalized adults.

Furthermore, if any competitors are successful in producing a more efficacious vaccine or other treatment for COVID-19 (including against emerging variant strains), or if any competitors are able to manufacture and distribute any such vaccines or treatments with greater efficiency there may be a diversion of potential governmental and other funding away from us and toward such other parties.

We are allocating significant financial and personnel resources to the development and commercialization of our COVID-19 Vaccine, which may cause delays in or otherwise negatively impact our other development programs. Our business could be negatively impacted by our allocation of significant resources to combating a global health threat that is unpredictable or against which our vaccine may ultimately prove unsuccessful or unprofitable.

Many seasonal influenza vaccines are currently approved and marketed. Competition in the sale of these seasonal influenza vaccines is intense. Therefore, newly developed and approved products must be differentiated from existing vaccines in order to have commercial success. In order to show differentiation in the seasonal influenza market, a product may need to be more efficacious, particularly in older adults, be less expensive or quicker to manufacture, or contain other differentiating characteristics, such as being combined with another vaccine. Many competitors are working on new products and new generations of current products, intended to be more efficacious than those currently marketed. Our CIC vaccine candidate may not prove to be more efficacious than current or future seasonal influenza products or future COVID-19 influenza combination products under development by our competitors. Further, our in-house or third-party manufacturing arrangements may not provide enough savings of time or money to provide the required differentiation for commercial success.

The development, manufacture and marketing of our pharmaceutical and biological products are subject to government regulation by the U.S. FDA and regulatory authorities in other jurisdictions, including the EMA, the Czech Republic’s State Institute for Drug Control (SUKL) with respect to our manufacturing facility in the Czech Republic and the Swedish Medical Products Agency (Läkemedelsverket, LV) with respect to our adjuvant product being developed in Sweden, as well as other country authorities into which active pharmaceutical ingredients and excipients are imported and/or manufactured by us or our sub-contracted manufacturers. In the U.S. and most foreign countries, we must complete rigorous preclinical testing and extensive clinical trials that demonstrate the safety and efficacy of a product in order to apply for regulatory approval to market the product. Additionally, we must demonstrate that our manufacturing facilities, processes and controls are adequate with respect to such product to assure safety, purity and potency and comply with applicable good manufacturing practice requirements. None of our vaccine candidates has yet gained full regulatory approval in the U.S., although our COVID-19 Vaccine has received provisional registration, conditional marketing authorization, emergency use authorization, or full approval in the various jurisdictions. We also have vaccine candidates in clinical trials and preclinical laboratory or animal studies.

The steps generally required by the U.S. FDA before our proposed investigational products may be marketed in the U.S. include:

•performance of preclinical (animal and laboratory) tests;

•submission to the U.S. FDA of an IND, which must become effective before clinical trials may commence;

•performance of adequate and well controlled clinical trials to establish the safety and efficacy of the investigational product in the intended target population;

•performance of a consistent and reproducible manufacturing process at commercial scale capable of passing U.S. FDA inspection;

•submission to the U.S. FDA of a BLA or a NDA; and

•U.S.FDA approval of the BLA or NDA before any commercial sale or shipment of the product.

Clinical trials that we undertake in other countries will be subject to similar or equivalent processes and requirements, In Europe, as well as an authorization for the trial itself, it is necessary to obtain the consent of a local ethics committee for each trial site and to provide for publication specific information about the trial and its outcome. If endpoints are not met, this information will be made publicly available and could be damaging to the reputation of the Company.

These processes are expensive and can take many years to complete, and we may not be able to demonstrate the safety, purity, potency and efficacy of our vaccine candidates to the satisfaction of regulatory authorities. The start of clinical trials can be delayed or take longer than anticipated for many and varied reasons, many of which are out of our control. Safety concerns may emerge that could lengthen the ongoing clinical trials or require additional clinical trials to be conducted. Promising results in early clinical trials may not be replicated in subsequent clinical trials. For example, the first batch of top line results from our Phase 2 CIC clinical trial evaluating safety and immunogenicity of different formulations of CIC may not be consistent with top line results from subsequent batches in such trial. Regulatory authorities may also require additional testing, and we may be required to demonstrate that our proposed products represent an improved form of treatment over existing therapies, which we may be unable to do without conducting further clinical trials. Moreover, if a regulatory authority grants regulatory approval of a product, the approval may be limited to specific indications or limited with respect to its distribution. Expanded or additional indications for approved products may not be approved, which could limit our revenue. Foreign regulatory authorities may apply similar limitations or may refuse to grant any approval. Consequently, even if we believe that preclinical and clinical data are sufficient to support regulatory approval for our vaccine candidates, the U.S. FDA and foreign regulatory authorities ultimately may not grant approval for commercial sale in their applicable jurisdiction, or may impose regulatory requirements that make further pursuit of approval uneconomical in one or more jurisdictions. If our vaccine candidates are not approved, our ability to generate revenue will be limited, and our business will be adversely affected.

Delays in obtaining regulatory approval can be extremely costly in terms of lost sales opportunities, loss of any potential marketing advantage of being early to market and increased clinical trial costs. For example, certain of our APAs and supply agreements may be terminated by the counterparty if we do not timely achieve requisite regulatory approval for our COVID-19 Vaccine in the relevant jurisdictions under such agreements. The speed with which we begin and complete the preclinical studies necessary to begin clinical trials, the clinical trials themselves and our applications for marketing approval will depend on several factors, including the following:

•our ability to scale-up and maintain manufacturing capability that reproducibly generates consistent yields of product with required purity, potency and quality; that such scale-up occurs on a timely basis; and that we have access to sufficient quantities of materials for use in necessary preclinical studies and clinical trials;

•regulatory authority review and approval of proposed clinical trial protocols;

•approval of clinical trials protocols and informed consent forms by institutional review boards responsible for overseeing the ethical conduct of the trial;

•the rate of participant enrollment and retention, which is a function of many factors, including the size of the participant population, the proximity of participants to clinical sites, the eligibility criteria for the clinical trial and the nature of the protocol;

•unfavorable test results or side effects experienced by clinical trial participants;

•analysis of data obtained from preclinical and clinical activities, which are susceptible to varying interpretations and which interpretations could delay, limit, result in the suspension or termination of, or prevent further conduct of clinical studies or regulatory approval;

•the availability of skilled and experienced staff to conduct and monitor clinical trials and to prepare the appropriate regulatory applications; and

•changes in the policies of regulatory authorities for drug or vaccine approval during the period of product development.

We have somewhat limited experience in conducting and managing the preclinical studies and clinical trials necessary to obtain regulatory marketing approvals. We may not be permitted to continue or commence additional clinical trials. We also face the risk that the results of our clinical trials may be inconsistent with the results obtained in preclinical studies or clinical trials of similar products or that the results obtained in later phases of clinical trials may be inconsistent with those obtained in earlier phases. A number of companies in the biotechnology and product development industry have suffered significant setbacks in advanced clinical trials, even after experiencing promising results in early animal and human testing.

Regulatory agencies may require us or our collaborators to delay, restrict or discontinue clinical trials on various grounds, including a finding that the participants are being exposed to an unacceptable health risk. In addition, we or our collaborators may be unable to submit applications to regulatory agencies within the time frame we currently expect. Once submitted, applications must be approved by various regulatory agencies before we or our collaborators can commercialize the product described in the application. All statutes and regulations governing the conduct of clinical trials are subject to change in the future, which could affect the cost of such clinical trials. Any unanticipated costs or delays in our clinical trials or regulatory submissions could delay our ability to generate revenue and harm our financial condition and results of operations.

We expect that regulatory authorities will continue to monitor and assess SARS-CoV-2 evolution and recommend that manufacturers make corresponding updates to the composition of their COVID-19 vaccines at least annually.

Inherent to this evolving approach to manufacturing new strains of COVID-19 vaccines, including our development of our COVID-19 Vaccine, we may encounter regulatory authorization, manufacturing, and distribution challenges, including export challenges. In doing so, we expect to seek alignment and acceptance by regulatory authorities that would allow us to use manufacturing and analytical testing methods employed in earlier COVID-19 vaccine production and commercialization efforts, that support an accurate characterization profile (including purity, potency, stability and like standards) of the relevant COVID-19 vaccine. Our inability to overcome product development challenges and gaining regulatory authority alignment may adversely affect our ability to obtain licensure of our COVID-19 vaccine or future COVID-19 vaccines at all, or in a timely manner.

Regarding future COVID-19 vaccine development, we may fail to receive authorization by regulatory authorities if we are unable to generate sufficient batch analysis data to demonstrate batch-to-batch consistency at commercial scale, if the data generated from our incremental research and development program do not support continued effectiveness of the vaccine to protect individuals against the then-relevant variant of SARS-CoV-2 because the vaccine does not induce an adequate level of neutralization titers against such variant, or if the product otherwise exhibits an unacceptable safety profile, rendering the benefit/risk balance unfavorable. Moreover, the new vaccine lots may not be accepted for distribution if required batch-release testing undertaken by officially designated laboratories does not show that such vaccine is of acceptable quality.

We were unable to accomplish the timely validation of the single-dose vial or pre-filled syringe presentation we had intended to use with the our COVID-19 Vaccine in the U.S. As a result, the five dose vial presentation for the fall 2023 vaccination season may have adversely impacted market acceptance, rate of product returns, or required higher price concessions in the U.S and may adversely impact us in the future if a single-dose or pre-filled syringe presentation is not authorized.

We intend to have our vaccine candidates marketed outside the U.S. In furtherance of this objective, we have entered into supply agreements with various foreign governments and international distribution agreements with commercial entities. In order to market our products in various countries globally , we must obtain separate regulatory approvals and comply with numerous and varying regulatory requirements. The approval procedure varies among countries and can involve additional testing and data review. The time required to obtain foreign regulatory approval may differ from that required to obtain U.S. FDA approval. The foreign regulatory approval process may include all of the risks associated with obtaining U.S. FDA approval. Additionally, regulatory authorities outside the U.S. might not accept data from trials conducted in other countries. Although our COVID-19 Vaccine has received provisional registration, conditional marketing authorization or emergency use authorization in a number of jurisdictions, we may not obtain regulatory approvals in other relevant jurisdictions on a timely basis, if at all. Approval by one regulatory agency does not ensure approval by regulatory agencies in other jurisdictions. However, a failure or delay in obtaining regulatory approval in one jurisdiction may have a negative effect on the regulatory approval process in other jurisdictions, including approval by the U.S. FDA. The failure to obtain regulatory approval in foreign jurisdictions could harm our business.

The regulatory pathway for our COVID-19 Vaccine is evolving and failure by us to comply with any laws, rules and standards, some of which may not exist yet or are subject to interpretation and may be subject to change, could result in a variety of adverse consequences, including penalties, fines and delays in vaccine licensure. Efforts to comply with evolving laws, regulations and standards have resulted in, and are likely to continue to result in, increased general and administrative expenses and a diversion of management time and attention to regulatory compliance activities. For example, the rules, regulations and standards governing the USG Agreement are uncertain and may evolve as the program progresses. Such rules or standards may adversely affect our plans to develop our COVID-19 Vaccine and failure by us to comply with any laws, rules or standards, some of which may not exist yet or may change, could result in a range of adverse consequences, such as penalties, fines or failure to receive funding.

The speed at which multiple stakeholders are moving to create, test and approve vaccines for COVID-19 is highly unusual and may increase the risks associated with traditional vaccine development, which typically takes between eight and ten years. Given this accelerated timeline, we and regulators, such as the U.S. FDA, the EMA, and the UK’s Medicines and Healthcare Products Regulatory Agency (“MHRA”) may make decisions more rapidly than is typical. Evolving or changing plans or priorities at the U.S. FDA or other regulatory bodies to whom we wish to apply for authorization, including based on new knowledge of COVID-19 and how the disease affects the human body, and new variants of the virus, may significantly affect the regulatory pathway for our COVID-19 Vaccine. Results from clinical testing may raise new questions and require us to redesign proposed clinical trials, including revising proposed endpoints or adding new clinical trial sites or cohorts of subjects. In addition, the U.S. FDA’s or other regulatory authorities’ analysis of clinical data may differ from our interpretation, or regulators’ requirements and expectations for vaccine authorization or approval may change over time, with the result that the U.S. FDA or other regulators may require that we conduct additional clinical trials or non-clinical studies. The evolving regulatory pathway may impede the development, commercialization and/or licensure of our COVID-19 Vaccine.

In addition, because the path to licensure of any vaccine against COVID-19 is unclear, we may have a widely used vaccine in circulation in certain countries as an investigational vaccine or a product authorized for temporary or emergency use prior to our receipt of full marketing approval. Unexpected safety issues in these circumstances could lead to significant reputational damage for Novavax and our technology platform going forward and other issues, including delays in our other programs, the need for re-design of our clinical trials and the need for significant additional financial resources. For example, although we currently operate under an emergency use authorization provided by the U.S. FDA for our updated COVID-19 Vaccine, the U.S. FDA may revoke such authorization if it determines that the underlying health emergency no longer exists or warrants such authorization, and we cannot predict how long such authorization will remain in place. Such revocation could adversely impact our business in a variety of ways.

We have and are currently conducting several clinical trials of our COVID-19 Vaccine at sites outside the U.S., including a Phase 3 pediatric study (2019nCoV-503) in the Dominican Republic, Guatemala, Honduras, the Philippines, and Mexico. Although the U.S. FDA may accept data from clinical trials conducted outside the U.S., acceptance of these data is subject to conditions imposed by the U.S. FDA. For example, the clinical trial must be well designed and conducted and be performed by qualified investigators in accordance with ethical principles. The trial population must also adequately represent the U.S. population, and the data must be applicable to the U.S. population and U.S. medical practice in ways that the U.S. FDA deems clinically meaningful. Other regulatory authorities impose equivalent requirements for their countries. In addition, while these clinical trials are subject to the applicable local laws, where the data is to be used to support our BLA, U.S. FDA acceptance of the data will depend on its determination that the trials also complied with all applicable U.S. laws and regulations. If the U.S. FDA does not accept the data from any trial that we conduct outside the U.S., it could result in delay pending completion of our trials conducted in the U.S. or result in the need for additional trials, which would be costly and time-consuming and could delay or permanently halt our development and commercialization of our COVID-19 Vaccine.

Even after a product gains regulatory approval, the product and the manufacturer of the product will be subject to continuing regulatory review, including adverse event reporting requirements and prohibitions against promoting products for unapproved uses. Failure to comply with any post-approval requirements can, among other things, result in warning letters, product seizures, recalls, substantial fines, injunctions, suspensions or revocations of marketing authorizations or licenses, operating restrictions and criminal prosecutions. Any such enforcement actions, any unanticipated changes in existing regulatory requirements or the adoption of new requirements, or any safety issues that arise with any approved products, could adversely affect our ability to market products and generate revenue and thus adversely affect our ability to continue our business.

We also may be restricted or prohibited from marketing or manufacturing a product, even after obtaining product approval, if previously unknown problems with the product or its manufacture are subsequently discovered. We cannot provide assurance that newly discovered or developed safety issues will not arise following regulatory approval. With the use of any vaccine by a wide patient population, serious adverse events may occur from time to time that did not arise in the clinical trials of the product or that initially appeared to be unrelated to the vaccine itself and only with the collection of subsequent information were found to be causally related to the product. Any such safety issues could cause us to suspend or cease marketing of our approved products, possibly subject us to substantial liabilities, and adversely affect our ability to generate revenue and our financial condition.

Given the significant global impact of the COVID-19 pandemic, it is possible that one or more government entities may take actions, including under the USG under the Defense Production Act of 1950, as amended, that directly or indirectly have the effect of diminishing some of our rights or opportunities with respect to our COVID-19 Vaccine, and the economic value of a COVID-19 vaccine to us could be limited. In addition, during a global health crisis, such as the COVID-19 pandemic, where the spread of a disease needs to be controlled, closed or heavily regulated national borders create challenges and delays in our development, production and distribution activities and may necessitate that we pursue strategies to develop, produce and distribute our vaccine candidates within self-contained national or international borders or with additional safety measures or checks in place, at potentially much greater expense and with longer timeframes for public distribution.

The ability of the U.S. FDA and other regulatory authorities to review and approve new product applications is affected by a variety of factors, including government budget and funding levels, ability to hire and retain key personnel and accept the payment of user fees, and statutory, regulatory and policy changes. For example, average review times at the U.S. FDA have fluctuated in recent years as a result. In addition, government funding of the SEC and other government agencies on which our operations may rely, including those that fund research and development activities, is subject to the political process, which is inherently fluid and unpredictable.

Disruptions at the U.S. FDA and other agencies may also slow the time necessary for new drugs to be reviewed and approved by necessary government agencies, which would adversely affect our business. For example, over the last several years, the USG has shut down several times and certain regulatory agencies, such as the U.S. FDA and the SEC, have had to furlough employees and stop or slow the pace of critical activities. Equally, the move of the EMA to the Netherlands from London caused a significant loss of experienced staff and the UK’s MHRA’s loss of funding from the E.U. has caused a loss of funding and consequently of staff. If a prolonged government shutdown or slowdown of the relevant regulatory authority occurs, it could significantly impact the ability of that Authority to timely review and process our regulatory submissions, which could have a material adverse effect on our business. Further, in our operations as a public company, future government shutdowns could impact our ability to access the public markets and obtain necessary capital in order to properly capitalize and continue our operations.

If a drug is intended for the treatment of a serious or life-threatening condition and the drug demonstrates the potential to address an unmet medical need for this condition, the drug sponsor may apply for U.S. FDA Fast Track Designation or similar fast track processes with other regulatory agencies. In the EU and the UK, rolling review procedure was relied upon for conditional marketing authorizations to be granted. However, Fast Track Designation or conditional authorizations do not ensure that the drug sponsor will receive marketing approval or that approval will be granted within any particular timeframe. The U.S. FDA granted Fast Track Designation for our prototype vaccine in November 2020, and for our recombinant quadrivalent seasonal influenza vaccine candidate, in January 2020. We may also seek Fast Track Designation for more of our other vaccine candidates. If we do seek Fast Track Designation for our other vaccine candidates, we may not receive it, and even if we receive Fast Track Designation, we may not experience a faster development process, review or approval compared to conventional U.S. FDA procedures. In addition, the U.S. FDA may withdraw Fast Track designation if it believes that the designation is no longer supported by data from our clinical development program. Fast Track Designation alone does not guarantee qualification for the U.S. FDA’s priority review procedures.

Obtaining a Fast Track Designation does not change the standards for product approval, but may expedite the development or approval process. Even though the U.S. FDA has granted such designation for our prototype vaccine, it may not actually result in faster clinical development or regulatory review or approval. Furthermore, such a designation does not increase the likelihood that our COVID-19 Vaccine will receive marketing approval in the U.S.

We are subject to various laws and regulations relating to safe working conditions, laboratory and manufacturing practices, the experimental use of animals, emissions and wastewater discharges, and the use and disposal of hazardous or potentially hazardous substances used in connection with our research, including infectious disease agents. We also cannot accurately predict the extent of regulations that might result from any future legislative or administrative action. Any of these laws or regulations could cause us to incur additional expense or restrict our operations.

Our facilities in Maryland are subject to various local, state and federal laws and regulations relating to safe working conditions, laboratory practices, the experimental use of animals and the use and disposal of hazardous or potentially hazardous substances, including chemicals, microorganisms and various hazardous compounds used in connection with our research and development activities. In the U.S., these laws include the Occupational Safety and Health Act, the Toxic Test Substances Control Act and the Resource Conservation and Recovery Act. Similar national and local regulations govern our facilities in Sweden, the Czech Republic, and Switzerland. We cannot eliminate the risk of accidental contamination or discharge or injury from these materials.

Federal, state and local laws and regulations govern the use, manufacture, storage, handling and disposal of these materials. We could be subject to civil damages in the event of an improper or unauthorized release of, or exposure of individuals to, these hazardous materials. In addition, claimants may sue us for injury or contamination that results from our use or the use by third parties of these materials, and our liability may exceed our total assets. Compliance with environmental laws and regulations may be expensive, and current or future environmental regulations may impair our research, development or production efforts.

Although we have general liability insurance, these policies contain exclusions from insurance against claims arising from pollution from chemicals or pollution from conditions arising from our operations. Our collaborators are working with these types of hazardous materials in connection with our collaborations. In the event of a lawsuit or investigation, we could be held responsible for any injury we or our collaborators cause to persons or property by exposure to, or release of, any hazardous materials. However, we believe that we are currently in compliance with all material applicable environmental and occupational health and safety regulations.

Within the U.S. (and within foreign countries), if we obtain full approval for any of our product candidates and begin commercializing them, our operations may be directly, or indirectly through our arrangements with third-party payors and customers, subject to additional healthcare regulation and enforcement by the federal and state governments (or the regulatory bodies or governments of foreign countries), which may constrain the business or financial arrangements and relationships through which we sell, market and distribute our products. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, structuring and commission(s), certain customer incentive programs and other business arrangements generally. Activities subject to these laws also involve the improper use of information obtained in the course of patient recruitment for clinical trials. The applicable U.S. federal and state healthcare laws and regulations (which may be comparable to foreign laws existing in foreign countries) that may affect our ability to operate include:

•the Federal Food, Drug and Cosmetic Act, which among other things, strictly regulates drug product marketing and promotion and prohibits manufacturers from marketing such products for unapproved uses;

•the federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, receiving or providing remuneration, directly or indirectly, to induce the referral for an item or service or the purchasing or ordering of a good or service, for which payment may be made under federal healthcare programs such as Medicare and Medicaid;

•federal false claims laws, including the FCA, which prohibit, among other things, individuals or entities from knowingly presenting, or causing to be presented, information or claims for payment from Medicare, Medicaid, or other third-party payers that are false or fraudulent;

•manufacturers can be held liable under the FCA even when they do not submit claims directly to government payors if they are deemed to “cause” the submission of false or fraudulent claims; the FCA also permits a private individual acting as whistleblower to bring actions on behalf of the federal government alleging violations of the FCA and to share in any monetary recovery;

•federal laws that require pharmaceutical manufacturers to report certain calculated product prices to the government or provide certain discounts or rebates to government authorities or private entities, often as a condition of reimbursement under government healthcare programs;

•the federal Physician Payment Sunshine Act and its implementing regulations, which require manufacturers of drugs, devices, biologicals, and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program (with certain exceptions) to report annually to the DHHS information related to payments or other transfers of value made to physicians (defined to include doctors, dentists, optometrists and chiropractors) and teaching hospitals, as well as ownership and investment interests held by physicians and their immediate family members; effective January 1, 2022, these reporting obligations extend to include transfers of value made to certain non-physician providers such as physician assistants and nurse practitioners; similar reporting requirements have also been enacted on the state level in the U.S., and an increasing number of countries worldwide either have adopted or are considering similar laws requiring disclosure of interactions with health care professionals;

•the federal law known as HIPAA, which, in addition to privacy protections applicable to healthcare providers and other entities, prohibits executing a scheme to defraud any healthcare benefit program or making false statements relating to healthcare matters;

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

•state law equivalents of the above federal laws, such as anti-kickback and false claims laws which may apply to items or services reimbursed by any third-party payer, including commercial insurers, and state gift ban and transparency laws, many of which state laws differ from each other in significant ways and often are not preempted by federal laws, thus complicating compliance efforts; and

•state laws restricting interactions with healthcare providers and other members of the healthcare community or requiring pharmaceutical manufacturers to implement certain compliance standards.

Because of the breadth of these laws and the narrowness of the statutory exceptions and safe harbors available, it is possible that some of our business activities could be subject to challenge under one or more of such laws. If our operations are found to be in violation of any of such laws or any other governmental regulations that apply to us, we may be subject to, on a corporate or individual basis, penalties, including civil and criminal penalties, damages, fines, the curtailment or restructuring of our operations, the exclusion from participation in federal and state healthcare programs and even imprisonment, any of which could materially adversely affect our ability to operate our business and our financial results. In addition, the cost of implementing sufficient systems, controls, and processes to ensure compliance with all of the aforementioned laws could be significant. Any action for violation of these laws, even if successfully defended, could cause us to incur significant legal expenses and divert management’s attention from the operation of the company’s business. If any of the physicians or other healthcare providers or entities with whom we expect to do business is found not to be in compliance with applicable laws, that person or entity may be subject to criminal, civil or administrative sanctions, including exclusions from government funded healthcare programs. Prohibitions or restrictions on sales or withdrawal of future marketed products could materially affect business in an adverse way.

It is not always possible to identify and deter employee misconduct, and the precautions we take to detect and prevent inappropriate conduct may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. Efforts to ensure that our business arrangements will comply with applicable healthcare laws may involve substantial costs. It is possible that governmental and enforcement authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law interpreting applicable fraud and abuse or other healthcare laws and regulations. If any such actions are instituted against us and we are not successful in defending ourselves or asserting our rights those actions, our business may be impaired.

The FCPA and similar worldwide anti-bribery and anti-corruption laws prohibit companies and their intermediaries from corruptly providing any payments or other benefits to foreign government officials for the purpose of obtaining or retaining business.

The U.S. Departments of Justice, Securities & Exchange Commission, Commerce, State and Treasury and other federal agencies and authorities have a broad range of civil and criminal penalties they may seek to impose against corporations and individuals for violations of the FCPA, economic sanctions laws, export control laws, and other federal statutes and regulations, including those established by the Office of Foreign Assets Control, or OFAC. In addition, the UK Bribery Act of 2010, or the Bribery Act, prohibits both domestic and international bribery, as well as bribery across both private and public sectors. An organization that fails to prevent bribery by anyone associated with the organization can be charged under the Bribery Act unless the organization can establish the defense of having implemented adequate procedures to prevent bribery.

Similarly, U.S. and similar worldwide trade laws, including economic sanctions, export laws, and customs laws, regulate our ability to conduct business with certain jurisdictions and counterparties, and regulate the ways in which we may export and import products around the world. In connection with these laws, various government agencies may require us to obtain export licenses, and may impose modifications to business practices, including requiring the cessation of business activities in or with countries, entities, and individuals targeted with sanctions. The breadth and dynamic nature of these laws and regulations may increase compliance costs, and may subject us to fines.

Novavax has received a number of regulatory approvals in ex-U.S. jurisdictions and has commenced commercial operations in these international locations, including partnering with third-parties in certain higher-risk jurisdictions. Further, a portion of our business with respect to our manufacturing is conducted outside of the U.S. in higher-risk jurisdictions. We expect our international activities to increase in the future. Though we maintain policies, internal controls and other measures reasonably designed to promote compliance with applicable anti-corruption and trade laws and regulations, our employees or agents may nevertheless engage in improper conduct for which we might be held responsible. Any violations of these anti-corruption or trade laws, or even allegations of such violations, can lead to an investigation and/or enforcement action, which could disrupt our operations, involve significant management distraction, and lead to significant costs and expenses, including legal fees. If we, or our employees or agents acting on our behalf, are found to have engaged in practices that violate these laws and regulations, we could be subject to criminal and civil enforcement action, suffer severe fines and penalties, profit disgorgement, injunctions on future conduct, securities litigation, bans on transacting government business, delisting from securities exchanges and other consequences that may have a material adverse effect on our business, financial condition and results of operations. In addition, our reputation, our revenue or our stock price could be adversely affected if we become the subject of any negative publicity related to actual or potential violations of anti-corruption or trade laws and regulations.

Our success in large part depends on our ability to maintain the proprietary nature of our technology and other trade secrets. To do so, we must prosecute and maintain existing patents, obtain new patents and pursue trade secret and other intellectual property protection. We also must operate without infringing the proprietary rights of third-parties or allowing third-parties to infringe our rights. We currently have or have rights to over 630 U.S. and foreign patents and patent applications covering our technologies. However, patent issues relating to pharmaceuticals and biologics involve complex legal, scientific and factual questions. To date, no consistent policy has emerged regarding the breadth of biotechnology patent claims that are granted by the U.S. Patent and Trademark Office (“USPTO”) or enforced by the federal courts. Therefore, we do not know whether any particular patent applications will result in the issuance of patents, or that any patents issued to us will provide us with any competitive advantage. We also cannot be sure that we will develop additional proprietary products that are patentable. Furthermore, there is a risk that others will independently develop or duplicate similar technology or products or circumvent the patents issued to us.

Although our patent filings include claims covering various features of our vaccine candidates, including composition, methods of manufacture and use, our patents do not provide us with complete protection against the development of competing products. Some of our know-how and technology is not patentable. To protect our proprietary rights in unpatentable intellectual property and trade secrets, we require employees, consultants, advisors and collaborators to enter into confidentiality agreements. These agreements may not provide meaningful protection for our trade secrets, know-how or other proprietary information, and such risk has been enhanced by the departure of employees in connection with our global restructuring and cost reduction plan.

Trademark registration to protect the trademarks for our proposed products will require approval from the USPTO in the U.S. and in trademark offices throughout the world in our key markets. The USPTO or a trademark office in a key international jurisdiction may refuse registration of any of our trademarks on a variety of potential grounds. If registration is not granted to one of our trademarks in the U.S. or in another key international jurisdiction, we may be required to adopt an alternative name for that proposed product. If we adopt an alternative name, we would lose the benefit of any existing trademark applications for such developmental candidate and may be required to expend significant additional resources in an effort to identify a suitable product name that would qualify under applicable trademark laws, not infringe the existing rights of third parties and be acceptable to the U.S. FDA and other regulatory authorities.

Our research, development and commercialization activities, including any vaccine candidates resulting from these activities, may be found to infringe patents or trademarks owned by third-parties and to which we do not hold licenses or other rights. There may be rights we are not aware of, including applications that have been filed, but not published that, when issued, could be asserted against us. These third-parties could bring claims against us, and that may cause us to incur substantial expenses and, if successful against us, could cause us to pay substantial damages. Further, if a patent or trademark infringement suit were brought against us, we could be forced to stop or delay research, development, manufacturing or sales of the product or biologic drug candidate that is the subject of the suit.

As a result of patent or trademark infringement claims, or in order to avoid potential claims, we may choose or be required to seek a license from the third party. These licenses may not be available on acceptable terms, or at all. Even if we are able to obtain a license, the license would likely obligate us to pay license fees or royalties or both, and the rights granted to us might be non- exclusive, which could result in our competitors gaining access to the same intellectual property. Ultimately, we could be prevented from commercializing a product, or be forced to cease some aspect of our business operations, if, as a result of actual or threatened patent or trademark infringement claims, we are unable to enter into licenses on acceptable terms. All of the issues described above could also impact our collaborators, which would also impact the success of the collaboration and therefore us.

There has been substantial litigation and other proceedings regarding patent, trademark, and other intellectual property rights in the pharmaceutical and biotechnology industries.

Competitors may infringe our patents or the patents of our collaborators or licensors. As a result, we may be required to file patent infringement suits to prevent unauthorized uses. This can be expensive and time-consuming. In addition, in an infringement proceeding, a court may decide that a patent of ours is not valid or is unenforceable, or may refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover its technology. An adverse determination of any litigation or defense proceeding could put one or more of our patents at risk of being invalidated or interpreted narrowly and could put our patent applications at the risk of not issuing. Competitors may infringe our trademarks or the trademarks of collaborators or licensors. As a result, we may be required to file suit to counter infringement for unauthorized use of an identical or confusingly similar trademark. This can be expensive and time-consuming.

Even if we are successful, litigation may result in substantial costs and distraction to our management. Even with a broad portfolio, we may not be able, alone or with our collaborators and licensors, to prevent misappropriation of our proprietary rights, particularly in countries where the laws may not protect such rights as fully as in the U.S.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. In addition, during the course of litigation, there could be public announcements of the results of hearings, motions or other interim proceedings or developments. If investors perceive these results to be negative, the market price for our common stock could be significantly harmed.

We may be subject to a variety of challenges from third parties that relate to the scope of the claims or to their validity. Such challenges can be mounted in post-grant review, ex parte re-examination, and inter partes review proceedings before the USPTO, or similar adversarial proceedings in other jurisdictions. If we are unsuccessful in any such challenge, the scope of our claims could be narrowed or could be invalidated. Any such outcome could impair our ability to exclude competitors from the market in those countries, potentially impacting our commercial success.

Our patents may be subject to various challenges related to ownership and inventorship, including interference or derivation proceedings. Third parties may assert that they are inventors on our patents or that they are owners of the patents. While we perform inventorship analyses to insure that the correct inventors are listed on our patents, we cannot be certain that a court of competent jurisdiction would arrive at the same conclusions we do. If we are unsuccessful in defending against ownership or inventorship challenges, a court may require us to list additional inventors, may invalidate the patent, or may transfer ownership of the patent to a third party. Any of these outcomes may harm our ability to exclude competitors and potentially impact our commercial success. Further, if ownership is transferred to a third party we may be required to seek a license to those rights to preserve our exclusive ability to practice the invention. Such a license may not be available on commercially reasonable terms, or at all. If we are unable to obtain a license, we may be required to expend time, effort, and other resources to design around the patent. Any such license may be non-exclusive and if a competitor is able to obtain a license from the third party, our ability to exclude that competitor from the market may be negatively impacted.

We may be subject to a variety of challenges from third parties that relate to the validity of our trademark registrations in the U.S. and internationally. Such challenges can be mounted in trademark cancellation and opposition proceedings before the USPTO, or similar adversarial proceedings in other jurisdictions. If we are unsuccessful in any such challenge, our trademark registrations could be narrowed or could be refused or canceled. Any such outcome could impair our ability to exclude competitors from using a confusingly similar mark, potentially impacting our commercial success.

Our trademark registrations may be subject to various challenges related to likelihood of confusion, use of a trademark in commerce, or other grounds in the U.S. and internationally. Third parties may assert that our trademarks infringe on their prior rights or that we are not using a trademark in a particular jurisdiction in connection with the goods/services identified in the trademark registration. While we perform trademark clearance searches and analysis to determine that we are not infringing upon the trademark rights of others, we cannot be certain that a court of competent jurisdiction would arrive at the same conclusions we do. If we are unsuccessful in defending against such challenges, a court may cancel our trademark registration and/or issue an injunction requiring that we cease use of the trademark. We may also not be able to rely on common law rights that we may have in any trademark. Any of these outcomes may potentially impact our commercial success.

We have in the past, and we expect in the future to license intellectual property from third parties and that these licenses will be material to our business. We will not own the patents or patent applications that underlie these licenses, and we may not control either the prosecution or the enforcement of the patents.

Under such circumstances, we may be forced to rely upon our licensors to properly prosecute and file those patent applications and prevent infringement of those patents.

While many of the licenses under which we have rights provide us with rights in specified fields, the scope of our rights under these and other licenses may be subject to dispute by our licensors or third parties. In addition, our rights to use these technologies and practice the inventions claimed in the licensed patents and patent applications are subject to our licensors abiding by the terms of those licenses and not terminating them. Any of our licenses may be terminated by the licensor if we are in breach of a term or condition of the license agreement, or in certain other circumstances.

Further, any disputes regarding obligations in licenses may require us to take expensive and time-consuming legal action to resolve, and, even if we are successful, may delay our ability to commercialize products and generate revenue. Further, if we are unable to resolve license issues that arise we may lose rights to practice intellectual property that is required to make, use, or sell products. Any such loss could compromise our development and commercialization efforts for current or future product candidates and/or may require additional effort and expense to design around.

Our vaccine candidates and potential vaccine candidates will require several components that may each be the subject of a license agreement. The cumulative license fees and royalties for these components may make the commercialization of these vaccine candidates uneconomical.

Important legal issues remain to be resolved as to the extent and scope of available patent protection for biopharmaceutical products and processes in the U.S. and other important markets outside the U.S., such as Europe and Japan. In addition, foreign markets may not provide the same level of patent protection as provided under the U.S. patent system. Litigation or administrative proceedings may be necessary to determine the validity and scope of certain of our and others’ proprietary rights. Any such litigation or proceeding may result in a significant commitment of resources in the future and could force us to do one or more of the following: cease selling or using any of our products that incorporate the challenged intellectual property, which would adversely affect our revenue; obtain a license from the holder of the intellectual property right alleged to have been infringed, which license may not be available on reasonable terms, if at all; and redesign our products to avoid infringing the intellectual property rights of third parties, which may be time-consuming or impossible to do. In addition, changes in, or different interpretations of, patent laws in the U.S. and other countries may result in patent laws that allow others to use our discoveries or develop and commercialize our products. We cannot provide assurance that the patents we obtain or the unpatented technology we hold will afford us significant commercial protection. In Europe, a new unitary patent system, which took effect on June 1, 2023, may significantly impact European patents, including those granted before the introduction of the new system. Under the new system, applicants can, upon grant of a patent, opt for that patent to become a Unitary Patent which will be subject to the jurisdiction of a new Unitary Patent Court (“UPC”). Patents granted before the implementation of the new system can be opted out of UPC jurisdiction, remaining as national patents in the UPC countries. Patents that remain under the jurisdiction of the UPC may be challenged in a single UPC-based revocation proceeding that, if successful, could invalidate the patent in all countries who are signatories to the UPC. Further, because the UPC is a new court system and there is no precedent for the court’s laws, there is increased uncertainty regarding the outcome of any patent litigation. We are unable to predict what impact the new patent regime may have on our ability to exclude competitors in the European market. In addition to changes in patents laws, geopolitical dynamics, including Russia’s incursion into Ukraine, may also impact our ability to obtain and enforce patents in particular jurisdictions. If we are unable to obtain and enforce patents as needed in particular markets, our ability to exclude competitors in those markets may be reduced.

In the U.S., the patent term is 20 years from the earliest U.S. non-provisional filing date. Extensions of patent term may be available under certain circumstances. Depending upon the timing, duration and conditions of U.S. FDA marketing approval of our product candidates, we may be able to extend the term of one patent that covers a marketed product under the Drug Price Competition and Patent Term Restoration Act of 1984, (the “Hatch-Waxman Amendments”) and similar legislation in the European Union and the United Kingdom.

The Hatch-Waxman Amendments permit patent term extension of up to five years for a patent covering an approved product as compensation for effective patent term lost during product development and the U.S. FDA regulatory review process. We may not receive any extension if we fail to apply within applicable deadlines, fail to apply prior to expiration of relevant patents or otherwise fail to satisfy applicable requirements. Moreover, the length of the extension could be less than we request. If we are unable to obtain patent term extension or the term of any such extension is less than we request, the period during which we can enforce our patent rights for that product will be shortened and our competitors may obtain approval to market competing products sooner.

Patent term covering our products may also be extended for time spent during the prosecution of the patent application in the USPTO. This extension is referred to as Patent Term Adjustment (“PTA”). The laws and regulations governing how the USPTO calculates the PTA is subject to change and changes in the law can reduce or increase any such PTA. Further, the PTA granted by the USPTO may be challenged by a third party. If we do not prevail under such a challenge, the PTA may be reduced or eliminated, shortening the patent term, which may negatively impact our ability to exclude competitors.

We anticipate growing through both internal development projects, as well as external opportunities, which include the acquisition, partnering and in-licensing of products, technologies and companies or the entry into strategic alliances and collaborations. The availability of high quality opportunities is limited, and we may fail to identify candidates that we and our stockholders consider suitable or complete transactions on terms that prove advantageous. In order to pursue such opportunities, we may require significant additional financing, which may not be available to us on favorable terms, if at all. Even if we are able to successfully identify and complete acquisitions, like our business combinations with Novavax CZ (formerly Praha Vaccines) and Novavax AB, strategic transactions involve many risks, including, among others, those related to diversion of management’s attention from other business concerns, unanticipated expenses and liabilities, and increased complexity of our operations, which could prevent us from effectively exploiting acquired facilities, successfully integrating the acquired business and personnel, or fully realizing expected synergies.

To effectively manage our current and future potential growth, we will need to continue to enhance our operational, financial and management processes and to effectively expand, train and manage our employee base. Supporting our growth initiatives will require significant expenditures and management resources, including investments in research and development, manufacturing in-house and through third-party manufacturers and other areas of our business. If we do not successfully manage our growth and do not successfully execute our growth initiatives, then our business and financial results may be adversely impacted, and we may incur asset impairment or restructuring charges.

Our management must evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year after the date the financial statements are issued. At December 31, 2023, we had $0.6 billion in cash and cash equivalents and restricted cash. During 2023, we incurred a net loss of $545.1 million and had net cash flows used in operating activities of $714.0 million.

While our current cash flow forecast for the one-year going concern look forward period estimates that we have sufficient capital available to fund operations, this forecast is subject to significant uncertainty, including as it relates to the following:

•2024 Revenue: Our 2024 revenue depends on our ability to successfully develop, manufacture, distribute, or market an updated monovalent or bivalent formulation of a vaccine candidate for COVID-19 in a single dose vial or pre-filled syringe product presentation for the fall 2024 COVID-19 vaccine season, which is inherently uncertain and subject to a number of risks, including regulatory authorizations and our ability to introduce a single-dose vial or pre-filled syringe product presentation for the U.S. commercial and certain other markets.

Management believes that, given the significance of these uncertainties, substantial doubt exists regarding our ability to continue as a going concern through one year from the date that these financial statements are issued.

Our ability to fund Company operations is dependent upon revenue related to vaccine sales for our products and product candidates, if such product candidates receive marketing approval and are successfully commercialized; the resolution of certain matters; and management’s plans, which may include raising additional capital through a combination of equity and debt financing, collaborations, strategic alliances, and marketing, distribution, or licensing arrangements. New financings may not be available to us on commercially acceptable terms, or at all. Also, any collaborations, strategic alliances, and marketing, distribution, or licensing arrangements may require us to give up some or all of our rights to a product or technology, which in some cases may be at less than the full potential value of such rights. In addition, the regulatory and commercial success of our COVID-19 Vaccine and our other vaccine candidates, including CIC vaccine candidate, or future COVID-19 variant strain-containing monovalent or bivalent formulations, remains uncertain. If we are unable to obtain additional capital, we will assess our capital resources and may be required to delay, reduce the scope of, or eliminate some or all of our operations, or downsize our organization, any of which may have a material adverse effect on our business, financial condition, results of operations, and ability to operate as a going concern.

In May 2023, we announced a global restructuring and cost reduction plan. This plan includes a more focused investment in our COVID-19 commercial program, reduction to our pipeline spending, the continued rationalization of our manufacturing network, a reduction to our global workforce, as well as the consolidation of facilities and infrastructure. The planned workforce reduction includes an approximately 25% reduction in our global workforce, comprised of an approximately 20% reduction in full-time Novavax employees and the remainder comprised of contractors and consultants. We expect the full annual impact of the cost savings to be realized in 2024. During 2023, we recorded a charge of $4.5 million related to one-time employee severance and benefit costs and $10.1 million costs related to the consolidation of facilities and infrastructure, the majority of which were incurred in the second quarter of 2023.

Additionally, in January 2024 we announced an additional 12% reduction of our global workforce, comprised of an additional 9% reduction in the Company’s full-time employees and the remainder comprised of contractors and consultants. The Company expects the full annual impact of the cost savings to be realized in 2025 and approximately 85% of the annual impact, excluding one-time charges, to be realized in 2024 due to timing of implementing the measures and the applicable laws, regulations and other factors in the jurisdictions in which it operates. The Company is expected to record an additional charge of approximately $4 million to $7 million related to one-time employee severance and benefit costs, the majority of which is expected to be incurred in the first quarter of 2024. Upon completion, the resulting Company workforce is expected to be approximately 30% lower as compared to the end of the first quarter of 2023.

We may not realize, in full or in part, the anticipated benefits, savings and improvements in our cost structure from these efforts due to unforeseen difficulties, delays or unexpected costs. If we are unable to realize the potential development progress and cost savings from the global restructuring and cost reduction plan, including the reduction to our global workforce, our business strategy, operating results and financial condition would be adversely affected. Our workforce reductions could yield unanticipated consequences, such as attrition beyond planned workforce reductions or disruptions in our day-to-day operations. Our global restructuring and cost reduction plan, including the reduction to our global workforce, could also harm our ability to attract and retain qualified management and development personnel who are critical to our business. If we are unable to realize the expected benefits from the restructuring and cost reduction plan, we may decide to undertake additional workforce reductions.

In the ordinary course of our business, we and many of our current and future strategic partners, vendors, contractors, and consultants collect and store sensitive data, including intellectual property, our proprietary business information and data about our clinical participants, suppliers and business partners, including personally identifiable information. The secure maintenance of this information is critical to our operations and business strategy. Some of this information represents an attractive target of criminal attack by malicious third parties with a wide range of motives and expertise, including nation-states, organized criminal groups, “hacktivists,” patient groups, disgruntled current or former employees and others. Our ongoing operating activities also depend on functioning information technology systems.

We are required to expend significant resources in an effort to protect against security incidents, and may be required or choose to spend additional resources or modify our business activities, particularly where required by applicable data privacy and security laws or regulations or industry standards. Cyber attacks are of ever-increasing levels of sophistication and frequency and, despite our security measures, our information technology systems and infrastructure and those of our vendors and partners are not immune to such attacks or breaches. Our profile as a recipient of funding under the USG Agreement and our development of our COVID-19 Vaccine may result in greater risk of cyber attack. Any such attack could result in a material compromise of our networks, and the information stored there could be accessed, publicly disclosed, lost, or rendered permanently or temporarily inaccessible. Furthermore, we may not promptly discover a system intrusion. Like other companies in our industry, we have and third parties with connections to our systems or with data relevant to our business have experienced attacks on our data and systems, including malware and computer viruses. Additionally, we partner with sites that store our clinical trial data, and their systems are also subject to the risk of cyberattacks, disruptions, or other security incidents. Attacks could have a material impact on our business, operations or financial results. Any access, disclosure or other loss of information, whether stored by us or our partners, or other cyberattack causing disruption to our business, including ransomware, could result in reputational, business, and competitive harms, significant costs related to remediation and strengthening our cyber defenses, legal claims or proceedings, government investigations, liability including under laws that protect the privacy of personal information, and increased insurance premiums, any of which could have a material adverse effect on our business, operations or financial results. We also may need to pay a ransom if a “ransomware” infection prevents access or use of our systems and we may face reputational and other harms in addition to the cost of the ransom if an attacker steals certain critical data in the course of such an attack.

Evolving state, federal and foreign laws, regulations and industry standards regarding privacy and security apply to our collection, use, retention, protection, disclosure, transfer and other processing of personal data. Privacy and data protection laws may be interpreted and applied differently from country to country and may create inconsistent or conflicting requirements, which increases the costs incurred by us in complying with such laws, which may be substantial. For example, the GDPR, which became effective in May 2018, imposes a broad array of requirements for processing personal data, including elevated disclosure requirements regarding collection and use of such data, requirements that companies allow individuals to exercise data protection rights such as their right to obtain copies or demand deletion of personal data held by those companies, limitations on retention of information, and public disclosure of significant data breaches, among other things. The GDPR provides for substantial penalties for non-compliance of up to the greater of €20 million or 4% of global annual revenue for the preceding financial year. From January 1, 2021 the GDPR has been retained in UK, as it forms part of the law of England and Wales, Scotland and Northern Ireland by virtue of section 3 of the European Union (Withdrawal) Act 2018, as amended by the Data Protection, Privacy and Electronic Communications (Amendments etc.) (EU Exit) Regulations 2019 (SI 2019/419) (“UK GDPR”), alongside the UK’s Data Protection Act 2018. The UK GDPR mirrors the fines under the GDPR, i.e., fines up to the greater of €20 million (£17.5 million) or 4% of global turnover. Our efforts to comply with GDPR, the UK GDPR and other privacy and data protection laws impose significant costs and challenges that are likely to increase over time, and we may be exposed to substantial penalties or litigation related to violations of existing or future data privacy laws and regulations.

Furthermore, transferring personal information across international borders is complex and subject to legal and regulatory requirements as well as active litigation and enforcement in a number of jurisdictions around the world, each of which could have an adverse impact on our ability to process and transfer personal data as part of our business operations. For example, the GDPR and UK GDPR impose strict restrictions surrounding the transfer of personal data to countries outside the EEA and the UK The mechanisms that we and many other companies rely upon for European data transfers (for example, Standard Contractual Clauses and the EU - US Data Privacy Framework) are the subject of legal challenge, regulatory interpretation and judicial decisions by the Court of Justice of the European Union. The suitability of Standard Contractual Clauses for data transfer in some scenarios has recently been the subject of legal challenge, and while the United States and the European Union reached agreement on the EU - US Data Privacy Framework, there are legal challenges to that data transfer mechanism as well. We continue to closely monitor for developments related to valid transfer mechanisms available for transferring personal data outside the European Economic Area (including the EU - US Data Privacy Framework) and other countries that have similar trans-border data flow requirements and adjust our practices accordingly.

If we are unable to implement a valid compliance mechanism for cross-border personal information transfers, we may face increased exposure to regulatory actions, substantial fines and injunctions against processing or transferring personal information from Europe to the U.S. An inability to import personal information from Europe to the U.S. may significantly and negatively impact our business operations, including by limiting our ability to conduct clinical trials in Europe; limiting our ability to collaborate with contract research organizations, service providers, contractors and other companies subject to the GDPR; or requiring us to increase our data processing capabilities in Europe at significant expense. Several other countries have also established specific legal requirements for cross-border transfers of personal information and certain countries have also established specific legal requirements for data localization (such as where personal data must remain stored in the country). If other countries implement more restrictive regulations for cross-border data transfers or do not permit data to leave the country of origin, such developments could adversely impact our business and our enterprise customers’ business, our financial condition and our results of operations in those jurisdictions.

Privacy laws and regulations are also expanding in the U.S. For example, the CCPA requires disclosures to California consumers, imposes rules for collecting or using information about minors and affords consumers abilities, such as the right to know whether their data is sold or disclosed and to whom, the right to request that a company delete their personal information, the right to opt-out of the sale of personal information and the right to non-discrimination in terms of price or service when a consumer exercises a privacy right. Like the GDPR, the CCPA establishes potentially significant penalties for violation. The CCPA also provides a private right of action along with statutory damages for certain data breaches. The California Privacy Rights Act (“CPRA”), became operational in 2023 and expands on the CCPA, creating new consumer rights and protections, including the right to correct personal information, the right to opt out of the use of personal information in automated decision making, the right to opt out of “sharing” consumer’s personal information for cross-context behavioral advertising, and the right to restrict use and disclosure of sensitive personal information. Virginia, Connecticut and Utah have also passed comprehensive privacy laws that became effective in 2023, and similar laws have been passed or are being considered in several other states, as well as at the federal and local levels. We will need to evaluate and update our privacy program to seek to comply with the CPRA, VCDPA, CPA and other federal and state privacy and data security laws, and we expect to incur additional expense in our effort to comply.

Such legislation may add additional complexity, variation in requirements, restrictions and potential legal risk, and may require additional investment of resources in compliance programs, impact strategies, reduce the availability of previously useful data and result in increased compliance costs and/or changes in business practices and policies.

Swedish-based Novavax AB and Czech Republic-based Novavax CZ are wholly owned subsidiaries of Novavax, Inc. We also have entered into a supply and license agreement with SIIPL, collaboration and license agreements with each of Takeda and SK bioscience and other agreements and arrangements with foreign governments and companies in other countries. We plan to continue to enter into collaborations or partnerships with companies, non-profit organizations and local governments in various parts of the world. Risks of conducting business outside the U.S. include negative consequences of:

•the costs associated with seeking to comply with multiple regulatory requirements that govern our ability to develop, manufacture and sell products in local markets;

•failure to comply with anti-bribery laws such as the U.S. Foreign Corrupt Practices Act and similar anti-bribery laws in other jurisdictions;

•new or changes in interpretations of existing trade measures, including tariffs, embargoes, sanctions, import restrictions, and export licensing requirements;

•difficulties in and costs of staffing, managing and operating our international operations;

•changes in environmental, health and safety laws;

•fluctuations in foreign currency exchange rates;

•new or changes in interpretations of existing tax laws;

•political instability and actual or anticipated military or potential conflicts (including, without limitation, the ongoing conflict between Russia and Ukraine, and a wider European or global conflict);

•economic instability, inflation, recession and interest rate fluctuations;

•minimal or diminished protection of intellectual property in many jurisdictions; and

•possible nationalization and expropriation.

These risks, individually or in the aggregate, could have a material adverse effect on our business, financial conditions, results of operations and cash flows.

We depend on our senior executive officers, as well as key scientific and other personnel. The loss of these individuals or our failure to implement an appropriate succession plan could harm our business and significantly delay or prevent the achievement of research, development or business objectives. Turnover in key executive positions resulting in lack of management continuity and long-term history with our Company could result in operational and administrative inefficiencies and added costs. These risks have increased since our global restructuring and cost reduction plan and related workforce reduction implemented in May 2023 and January 2024, which increased the risk that we will lose technical know-how or other trade secrets as experienced personnel depart.

We may not be able to attract qualified individuals for key positions on terms acceptable to us. Competition for qualified employees is intense among pharmaceutical and biotechnology companies, and the loss of qualified employees, or an inability to attract, retain and motivate additional highly skilled employees could hinder our ability to complete clinical trials successfully and otherwise develop marketable products.

We also rely from time to time on outside advisors who assist us in formulating our research and development and clinical strategy. We may not be able to attract and retain these individuals on acceptable terms, which could delay our development efforts.

In 2022, we issued $175.3 million aggregate principal amount of Notes. Our ability to make scheduled payments of the principal of, to pay interest on, or to refinance our indebtedness, including the Notes, depends on our future performance, which is subject to economic, financial, competitive and other factors beyond our control. We do not expect our business to be able to generate cash flow from operations sufficient to service our debt and make necessary capital expenditures and may therefore be required to adopt one or more alternatives, such as selling assets, restructuring debt or obtaining additional equity capital on terms that may be onerous or highly dilutive. Our ability to refinance our indebtedness, which matures in 2027, unless earlier converted, redeemed, or repurchased, will depend on the capital markets and our financial condition at such time. We may not be able to engage in any of these activities or engage in these activities on desirable terms, which could result in a default on our debt obligations, and limit our flexibility in planning for and reacting to changes in our business.

Holders of the Notes will have the right to require us to repurchase their Notes for cash upon the occurrence of a fundamental change at a fundamental change repurchase price equal to 100% of the principal amount of the Notes to be repurchased, plus accrued and unpaid interest, if any.

A fundamental change may also constitute an event of default or prepayment under, and result in the acceleration of the maturity of, our then-existing indebtedness. We cannot assure that we will have sufficient financial resources, or will be able to arrange financing, to pay the fundamental change repurchase price in cash with respect to any Notes surrendered by holders for repurchase upon a fundamental change. In addition, restrictions in our then existing credit facilities or other indebtedness, if any, may not allow us to repurchase the Notes upon a fundamental change. Our failure to repurchase the Notes upon a fundamental change when required would result in an event of default pursuant to the indenture governing the Notes which could, in turn, constitute a default under the terms of our other indebtedness, if any. If the repayment of the related indebtedness were to be accelerated after any applicable notice or grace periods, we may not have sufficient funds to repay the indebtedness and repurchase the Notes.

Our stock price has been highly volatile. From January 1, 2023 through December 31, 2023, the closing sale price of our common stock has been as low as $4.80 per share and as high as $12.48 per share. The stock market in general and the market for biotechnology companies in particular have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. For example, the trading prices of biopharmaceutical companies in particular have been highly volatile as a result of the COVID-19 pandemic, inflation and increased interest rates. These broad market fluctuations may cause the market price of our common stock to be lower or more volatile than expected.

Furthermore, given the global focus on the COVID-19 pandemic and our investment in developing a COVID-19 vaccine, information in the public arena on this topic, whether or not accurate, has had and will likely continue to have an outsized impact (positive or negative) on our stock price. Information related to our development, manufacturing, regulatory and commercialization efforts with respect to our COVID-19 Vaccine, or information regarding such efforts by competitors with respect to their COVID-19 vaccines and vaccine candidates, may meaningfully impact our stock price. As a result of this volatility, you may not be able to sell your common stock at or above your initial purchase price. The market price of our common stock may be influenced by many other factors, including:

•future announcements about us or our collaborators or competitors, including the results of testing, technological innovations or new commercial products;

•clinical trial results;

•delays in making regulatory submissions;

•depletion of our cash reserves;

•sale of equity securities or issuance of additional debt;

•announcement by us of significant strategic partnerships, collaborations, joint ventures, capital commitments or acquisitions;

•changes in government regulations;

•impact of competitor successes and in particular development success of vaccine candidates that compete with our own vaccine candidates;

•developments in our relationships with our collaboration and funding partners;

•announcements relating to health care reform and reimbursement levels for new vaccines and other matters affecting our business and results, regardless of accuracy;

•sales of substantial amounts of our stock by us or existing stockholders (including stock by insiders or 5% stockholders);

•development, spread or new announcements related to pandemic diseases;

•litigation;

•public concern as to the safety of our products;

•significant set-backs or concerns with the industry or the market as a whole;

•regulatory inquiries, reviews and potential action, including from the U.S. FDA or the SEC;

•demand for bivalent vaccines;

•recommendations by securities analysts or changes in earnings estimates; and

•the other factors described in this Risk Factors section.

In the past, following periods of volatility in the market price of a company’s securities, securities class-action litigation often has been instituted against that company. Such litigation, if instituted against us, could cause us to incur substantial costs to defend such claims and divert management’s attention and resources, which could seriously harm our business, financial condition, and results of operations, and prospects.

If we are unable to partner with a third-party to advance the development of one or more of our vaccine candidates, we will need to raise money through additional debt or equity financings. To the extent that we raise additional capital by issuing equity securities, our stockholders will experience immediate dilution, which may be significant. There is also a risk that such equity issuances may cause an ownership change under the Internal Revenue Code of 1986, as amended, and similar state provisions, thus limiting our ability to use our net operating loss carryforwards and credits. To the extent that we raise additional capital through licensing arrangements or arrangements with collaborative partners, we may be required to relinquish, on terms that may not be favorable to us, rights to some of our technologies or vaccine candidates that we would otherwise seek to develop or commercialize ourselves. In addition, economic conditions may also negatively affect the desire or ability of potential collaborators to enter into transactions with us. They may also have to delay or cancel research and development projects or reduce their overall budgets.

Provisions in our organizational documents could hamper a third party’s attempt to acquire, or discourage a third-party from attempting to acquire control of, the Company. Stockholders who wish to participate in these transactions may not have the opportunity to do so. Our organizational documents also could limit the price investors are willing to pay in the future for our securities and make it more difficult to change the composition of our Board in any one year. For example, our organizational documents provide for a staggered board with three classes of directors serving staggered three-year terms and advance notice requirements for stockholders to nominate directors and make proposals.

As a Delaware corporation, we are also afforded the protections of Section 203 of the Delaware General Corporation Law, which will prevent us from engaging in a business combination with a person who acquires at least 15% of our common stock for a period of three years from the date such person acquired such common stock, unless advance board or stockholder approval was obtained.

Any delay or prevention of a change of control transaction or changes in our Board or management could deter potential acquirers or prevent the completion of a transaction in which our stockholders could receive a substantial premium over the then current market price for their shares.

We have never paid cash dividends on our common stock. We currently anticipate that we will retain all of our earnings for use in the development of our business and do not anticipate paying any cash dividends in the foreseeable future. As a result, capital appreciation, if any, of our common stock would be the only source of gain for stockholders until dividends are paid, if at all.

In addition to intellectual property litigation, from time to time, we may be subject to other litigation or regulatory investigations. Regardless of the merits of any claims that may be brought against us, litigation or regulatory investigations could result in a diversion of management’s attention and resources and we may be required to incur significant expenses defending against these claims. If we are unable to prevail in litigation or regulatory investigations, we could incur substantial liabilities. Where we can make a reasonable estimate of the liability relating to pending litigation and determine that it is probable, we record a related liability. As additional information becomes available, we assess the potential liability and revise estimates as appropriate. However, because of uncertainties relating to litigation, the amount of our estimates could be wrong.

Our operations, and those of our clinical research organizations, contract manufacturing organizations, vendors of materials needed in manufacturing, collaboration partners, distributors and other third parties upon whom we depend, could be subject to fires, extreme weather conditions, earthquakes, power shortages, telecommunications failures, water shortages, floods, hurricanes, typhoons, war, political unrest, sabotage or terrorism and other natural or man-made disasters, as well as public health emergencies, such as the COVID-19 pandemic. The occurrence of any of these business disruptions could prevent us from using all or a significant portion of our facilities and it may be difficult or impossible for us to continue certain activities for a substantial period of time. The disaster recovery and business continuity plans we have in place may prove inadequate in the event of a serious disaster or similar event and we may incur substantial expenses and delays as a result. Our ability to manufacture our product candidates and obtain necessary clinical supplies for our product candidates could be disrupted if the operations of our contract manufacturing organizations or suppliers are affected by a natural or man-made disaster, or a public health emergency.

Given that COVID-19 represented an unprecedented urgent public health crisis and that we have received significant funding from the U.S. and foreign governments and other sources to support the development and commercialization of our COVID-19 Vaccine, we have observed and are likely to continue to face significant public attention and scrutiny over the complex decisions we have made and will be making regarding the development, testing, manufacturing, allocation and pricing of our COVID-19 Vaccine. If we are unable to successfully manage these risks, we could face significant reputational harm, which could negatively affect our stock price. The intense public interest, including speculation by the media, in the development of our COVID-19 Vaccine has caused significant volatility in our stock price, which we expect to continue as data and other information from our ongoing clinical trials become publicly available.

If concerns should arise about the actual or anticipated efficacy or safety of any of our product candidates, such concerns could adversely affect the market’s perception of these candidates, which could lead to a decline in investors’ expectations and a decline in the price of our common stock.

Social media is increasingly being used to communicate about pharmaceutical companies’ research, product candidates, and the diseases such product candidates are being developed to prevent. Social media practices in the pharmaceutical industry continue to evolve and regulations relating to such use are not always clear. This evolution creates uncertainty and risk of noncompliance with regulations applicable to our business, resulting in potential regulatory actions against us. For example, subjects may use social media channels to comment on their experience in an ongoing blinded clinical trial or to report an alleged adverse event. When such events occur, there is a risk that we fail to monitor and comply with applicable adverse event reporting obligations or we may not be able to defend our business or the public’s legitimate interests in the face of the political and market pressures generated by social media due to restrictions on what we may say about our investigational product candidates. There is also a risk of inappropriate disclosure of sensitive information or negative or inaccurate posts or comments about us on any social media or networking website. If any of these events were to occur or we otherwise fail to comply with applicable regulations, we could incur liability, face regulatory actions, or incur reputational or other harm to our business.

None.

The Company has adopted a cybersecurity risk management program that includes processes designed to identify, assess, manage, and monitor risks from cybersecurity threats. We have integrated cybersecurity risk management into our broader risk management framework to promote a company-wide culture of cybersecurity awareness and risk management. Those processes include conducting an assessment of internal and external threats to the security, confidentiality, integrity and availability of Company data and systems along with other material risks to Company operations, at least annually or whenever there are material changes to the Company’s systems or operations and responding to risks identified. The Company uses NIST cybersecurity and risk management frameworks to assess its cybersecurity controls, risks, and overall program effectiveness. As part of our risk management process, the Company also engages outside providers to conduct periodic internal and external penetration testing and security assessments. As part of our third-party risk management program, we conduct assessments of vendor cybersecurity risks, including risks associated with our cloud vendors and other third parties.

As of the date of this report, we have not experienced a cybersecurity incident that resulted in a material effect on our business strategy, results of operations, or financial condition. Despite our continuing efforts, we cannot guarantee that our cybersecurity safeguards will prevent breaches or breakdowns of our or our third-party service providers’ information technology systems, particularly in the face of continually evolving cybersecurity threats and increasingly sophisticated threat actors. For example, in 2020, several domestic and foreign security agencies announced that government actors or government-affiliated actors were specifically targeting organizations, like us, engaging in COVID-19 vaccine development and research. For more information, see Item 1A Risk Factors, “Security breaches and other disruptions to our information technology systems or those of the vendors on whom we rely could compromise our information and expose us to liability, reputational damage, or other costs.”

The cybersecurity risk management program is led by the Company’s Chief Information Officer (“CIO”) who has over 20 years of experience in information systems, cybersecurity, and data protection. The CIO reports to the Company’s Audit Committee at least annually, as well as to the Board of Directors, the Company’s Chief Executive Officer, and other members of our senior management as appropriate. These reports may feature an overall assessment of the Company’s compliance with the Company’s cybersecurity policies and include topics such as risk assessment, risk management and control decisions, service provider arrangements, test results, security incidents and responses, and recommendations for changes and updates to policies and procedures. Our program is evaluated by internal and external experts with the results of those reviews reported to senior management and the Board.

As of December 31, 2023, we leased approximately 170,000 square feet of office space in Gaithersburg, Maryland that serves as our corporate headquarters (“700QO”), and intend to use for manufacturing and research and development. The term of the 700QO lease agreement is approximately 15 years, and we have the option to extend the Lease Agreement for two successive five-year terms.

As of December 31, 2023, we also lease and own approximately 192,000 square feet of office and other space in the U.S., apart from our corporate headquarters and approximately 260,000 in various foreign locations. We use this space for our services and support, commercial, research and development, manufacturing, and administrative personnel. Although we believe that our facilities are suitable and adequate for our present needs, the Company’s management continues to review and assess real property requirements that may be necessary to address our current business plan.

On November 12, 2021, Sothinathan Sinnathurai filed a purported securities class action in the U.S. District Court for the District of Maryland (the “Maryland Court”) against the Company and certain members of senior management, captioned Sothinathan Sinnathurai v.

Novavax, Inc., et al., No. 8:21-cv-02910-TDC (the “Sinnathurai Action”). On January 26, 2022, the Maryland Court entered an order designating David Truong, Nuggehalli Balmukund Nandkumar, and Jeffrey Gabbert as co-lead plaintiffs in the Sinnathurai Action. The co-lead plaintiffs filed a consolidated amended complaint on March 11, 2022, alleging that the defendants made certain purportedly false and misleading statements concerning the Company’s ability to manufacture prototype vaccine on a commercial scale and to secure the prototype vaccine’s regulatory approval. The amended complaint defines the purported class as those stockholders who purchased the Company’s securities between February 24, 2021 and October 19, 2021. On April 25, 2022, the defendants filed a motion to dismiss the consolidated amended complaint. On December 12, 2022, the Maryland Court issued a ruling granting in part and denying in part defendants’ motion to dismiss. The Maryland Court dismissed all claims against two individual defendants and claims based on certain public statements challenged in the consolidated amended complaint. The Maryland Court denied the motion to dismiss as to the remaining claims and defendants, and directed the Company and other remaining defendants to answer within fourteen days. On December 27, 2022, the Company filed its answer and affirmative defenses. On March 16, 2023, the plaintiffs filed a motion for class certification and to appoint class representatives and counsel. Due to the Maryland Court’s ruling on the dismissal motion, the motion sought to certify a class of stockholders who purchased the Company’s securities between May 11, 2021, and October 19, 2021. The Company filed its opposition to the plaintiffs’ motion on September 22, 2023. On December 4, 2023, the parties agreed to a binding settlement in principle (the “Proposed Settlement”) to fully resolve the surviving claims in the Sinnathurai Action. Under the Proposed Settlement’s terms, the Company agreed to pay $47 million into a settlement fund, which will be funded by the Company’s directors and officers’ liability insurance and paid to members of a putative settlement class. On January 12, 2024, after the parties negotiated and executed a written agreement governing the Proposed Settlement, plaintiffs filed an unopposed motion for the Proposed Settlement’s preliminary approval. On January 23, 2024, the Maryland Court granted the motion for preliminary approval and, as requested by the parties, preliminarily certified, for the purposes of settlement only, the settlement class. The court also scheduled a settlement hearing to consider final approval of the settlement for May 23, 2024.

After the Sinnathurai Action was filed, eight derivative lawsuits were filed: (i) Robert E. Meyer v. Stanley C. Erck, et al., No. 8:21-cv-02996-TDC (the “Meyer Action”), (ii) Shui Shing Yung v. Stanley C. Erck, et al., No. 8:21-cv-03248-TDC (the “Yung Action”), (iii) William Kirst, et al. v. Stanley C. Erck, et al., No. C-15-CV-21-000618 (the “Kirst Action”), (iv) Amy Snyder v. Stanley C. Erck, et al., No. 8:22-cv-01415-TDC (the “Snyder Action”), (v) Charles R. Blackburn, et al. v. Stanley C. Erck, et al., No. 1:22-cv-01417-TDC (the “Blackburn Action”), (vi) Diego J. Mesa v. Stanley C. Erck, et al., No. 2022-0770-NAC (the “Mesa Action”), (vii) Sean Acosta v. Stanley C. Erck, et al., No. 2022-1133-NAC (the “Acosta Action”), and (viii) Jared Needelman v. Stanley C. Erck, et al., No. C-15-CV-23-001550 (the “Needelman Action”). The Meyer, Yung, Snyder, and Blackburn Actions were filed in the Maryland Court. The Kirst and Needelman Actions were filed in the Circuit Court for Montgomery County, Maryland. The Mesa and Acosta Actions were filed in the Delaware Court of Chancery (the “Delaware Court”). The derivative lawsuits name members of the Company’s board of directors and certain members of senior management as defendants. The Company is deemed a nominal defendant. The plaintiffs assert derivative claims arising out of substantially the same alleged facts and circumstances as the Sinnathurai Action. Collectively, the derivative complaints assert claims for breach of fiduciary duty, insider selling, unjust enrichment, violation of federal securities law, abuse of control, waste, and mismanagement. Plaintiffs seek declaratory and injunctive relief, as well as an award of monetary damages and attorneys’ fees.

On February 7, 2022, the Maryland Court entered an order consolidating the Meyer and Yung Actions (the “First Consolidated Derivative Action”). The plaintiffs in the First Consolidated Derivative Action filed their consolidated derivative complaint on April 25, 2022. On May 10, 2022, the Maryland Court entered an order granting the parties’ request to stay all proceedings and deadlines pending the earlier of dismissal or the filing of an answer in the Sinnathurai Action. On June 10, 2022, the Snyder and Blackburn Actions were filed. On October 5, 2022, the Maryland Court entered an order granting a request by the plaintiffs in the First Consolidated Derivative Action and the Snyder and Blackburn Actions to consolidate all three actions and appoint co-lead plaintiffs and co-lead and liaison counsel (the “Second Consolidated Derivative Action”). The co-lead plaintiffs in the Second Consolidated Derivative Action filed a consolidated amended complaint on November 21, 2022. On February 10, 2023, defendants filed a motion to dismiss the Second Consolidated Derivative Action. The plaintiffs filed their opposition to the motion to dismiss on April 11, 2023. Defendants filed their reply brief in further support of their motion to dismiss on May 11, 2023. On August 21, 2023, the court entered an order granting in part and denying in part the motion to dismiss; the court allowed claims for alleged insider selling under Brophy v. Cities Service Co., et al., 70 A.2d 5 (Del. Ch. 1949) and unjust enrichment claims to proceed, but dismissed the remaining claims in the second consolidated amended complaint. On September 5, 2023, the Company filed an Answer to the consolidated amended complaint. On September 6, 2023, the court entered an order granting the individual defendants an extension of time to file their answer until November 6, 2023. On October 6, 2023, the Board of Directors of the Company formed a Special Litigation Committee (“SLC”) with full and exclusive power and authority of the Board to, among other things, investigate, review, and analyze the facts and circumstances surrounding the claims asserted in the pending derivative actions, including the claims that remain following the court’s order on the motion to dismiss in the Second Consolidated Derivative Action.

On November 7, 2023, the court entered an order granting the parties’ request to stay the Second Consolidated Derivative Action for up to six months from the date of entry of the order. This includes staying the deadline for the individual defendants to respond to the consolidated amended complaint.

The Kirst Action was filed on December 28, 2021, and the defendants immediately removed the case to the Maryland Court. On July 21, 2022, the Maryland Court issued a memorandum opinion and order remanding the Kirst Action to state court. The plaintiffs filed an amended complaint on December 30, 2022. On January 23, 2023, defendants filed a motion to stay the Kirst action. On February 22, 2023, the parties in the Kirst Action filed, for the Court’s approval, a stipulation staying the Kirst Action pending the resolution of defendants’ motion to dismiss in the Second Consolidated Derivative Action. On March 22, 2023, the Court entered the parties’ stipulated stay of the Kirst Action pending resolution of the motion to dismiss in the Second Consolidated Derivative Action.

On November 30, 2023, the court entered an order consolidating the Kirst and Needelman Actions. On December 14, 2023, the parties filed a stipulation (i) extending the plaintiffs’ deadline to file a consolidated complaint until January 29, 2024, and (ii) otherwise staying all other proceedings in the case (including the defendants’ deadline to respond to the consolidated complaint) until February 12, 2024. The stipulation entered by the court instructs the parties to discuss whether the stay should be further extended in light of the then-current status of the SLC’s investigation.

On November 18, 2022, the Company delivered written notice to Gavi to terminate the Gavi APA based on Gavi’s failure to procure the purchase of 350 million doses of prototype vaccine from the Company as required by the Gavi APA. As of November 18, 2022, the Company had only received orders under the Gavi APA for approximately 2 million doses. On December 2, 2022, Gavi issued a written notice purporting to terminate the Gavi APA based on Gavi’s contention that the Company repudiated the agreement and, therefore, materially breached the Gavi APA. Gavi also contended that, based on its purported termination of the Gavi APA, it was entitled to a refund of the Advance Payment Amount less any amounts that have been credited against the purchase price for binding orders placed by a buyer participating in the COVAX Facility. Since December 31, 2022, the remaining Gavi Advance Payment Amount, which is $696.4 million as of December 31, 2023, pending resolution of the dispute with Gavi related to a return of the remaining Advance Payment Amount, has been classified within Other current liabilities in the Company’s consolidated balance sheet. On January 24, 2023, Gavi filed a demand for arbitration with the International Court of Arbitration based on the claims described above. The Company filed its Answer and Counterclaims on March 2, 2023. On April 5, 2023, Gavi filed its Reply to the Company’s Counterclaims.

On February 16, 2024, the Company and Gavi entered into a Termination and Settlement Agreement (the “Settlement Agreement”) terminating the Gavi APA, which related to the supply of the Company’s vaccine against SARS-COV-2 for the prevention of COVID-19, settling the arbitration proceedings initiated by Gavi against the Company relating to the APA and releasing both parties of all claims arising from, under or otherwise in connection with the APA. Pursuant to the Settlement Agreement, the Company is responsible for payment to Gavi of (i) an initial settlement payment of $75 million, which the Company paid on February 20, 2024, and (ii) deferred payments, in equal annual amounts of $80 million payable each calendar year through a deferred payment term ending December 31, 2028. The deferred payments are due in variable quarterly installments beginning in the first quarter of 2024 and total $400 million during the deferred payment term. Such deferred payments may be reduced through Gavi’s use of an annual vaccine credit equivalent to the unpaid balance of such deferred payments each year, which may be applied to qualifying sales of any of the Company’s vaccines funded by Gavi for supply to certain low-income and lower-middle income countries. The Company has the right to price the vaccines offered to such low-income and lower-middle income countries in its discretion, and, when utilized by Gavi, the Company will credit the actual price per vaccine paid against the applicable credit. The Company intends to price vaccines offered via the tender process, consistent with its shared goal with Gavi to provide equitable access to those countries. On February 22, 2024, the claims and counterclaims were dismissed with prejudice.

On September 30, 2022, the Company, FUJIFILM Diosynth Biotechnologies UK Limited (“FDBK”), FUJIFILM Diosynth Biotechnologies Texas, LLC (“FDBT”), and FUJIFILM Diosynth Biotechnologies USA, Inc. (“FDBU” and together with FDBK and FDBT, “Fujifilm”) entered into a Confidential Settlement Agreement and Release (the “Fujifilm Settlement Agreement”) regarding amounts due to Fujifilm in connection with the termination of manufacturing activity at FDBT under the Commercial Supply Agreement (the “CSA”) dated August 20, 2021 and Master Services Agreement dated June 30, 2020 and associated statements of work (the “MSA”) by and between the Company and Fujifilm. The MSA and CSA established the general terms and conditions applicable to Fujifilm’s manufacturing and supply activities related to the Company’s prototype vaccine under the associated statements of work. Pursuant to the Fujifilm Settlement Agreement, the Company agreed to pay up to $185.0 million (the “Settlement Payment”) to Fujifilm in connection with cancellation of manufacturing activity at FDBT. Under the Fujifilm Settlement Agreement, the final two quarterly installments due to Fujifilm were subject to Fujifilm’s obligation to use commercially reasonable efforts to mitigate losses associated with the vacant manufacturing capacity caused by the termination of manufacturing activities at FDBT under the CSA. Any replacement revenue achieved by Fujifilm’s mitigation efforts between July 1, 2023 and December 31, 2023 would offset the final two settlement payments owed by the Company. On October 2, 2023, the Company sent a notice of breach under the Fujifilm Settlement Agreement to Fujifilm setting forth the Company’s position that Fujifilm had not used commercially reasonable efforts to mitigate losses. The Company withheld two installments of $34.3 million due to Fujifilm on September 30, 2023 and December 31, 2023, pending resolution of the issues identified in the notice of breach. On October 30, 2023, FDBT filed a demand for arbitration with Judicial Arbitration and Mediation Services (“JAMS”) seeking payment of the third quarter installment of the Settlement Payment. An arbitration hearing has been scheduled for May 2024.

The Company is also involved in various legal proceedings arising in the normal course of business. Although the outcomes of these legal proceedings are inherently difficult to predict, management does not expect the resolution of these legal proceedings to have a material adverse effect on our financial position, results of operations, or cash flows.

Our common stock trades on the Nasdaq Global Select Market under the symbol “NVAX.” Our common stock was held by approximately 177 stockholders of record as of February 23, 2024, one of which is Cede & Co., a nominee for Depository Trust Company (“DTC”). All of the shares of common stock held by brokerage firms, banks, and other financial institutions as nominees for beneficial owners are deposited into participant accounts at DTC, and are therefore considered to be held of record by Cede & Co. as one stockholder. We do not anticipate declaring or paying any cash dividends in the foreseeable future.

Information regarding our equity compensation plans, including both stockholder approved plans and non-stockholder approved plans, is included in Part III, Item 12 of this Annual Report on Form 10-K.

The graph below matches Novavax, Inc.'s cumulative 5-Year total shareholder return on common stock with the cumulative total returns of the Nasdaq Composite Index and the Russell 2000 Growth Biotechnology Index. The graph tracks the performance of a $100 investment in our common stock and in each index (with the reinvestment of all dividends) from December 31, 2018 to December 31, 2023.

Among Novavax Inc., the NASDAQ Composite index,

and the Russell 2000 Growth Biotechnology Index

*$100 invested on 12/31/18 in stock or index, including reinvestment of dividends.

Fiscal year ending December 31.

Value of $100 invested on December 31, 2018 in stock or index, including reinvestment of dividends, for fiscal years ended:

This graph is not “soliciting material,” is not deemed “filed” with the SEC, and is not to be incorporated by reference in any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

Any statements in the discussion below and elsewhere in this Annual Report on Form 10-K about expectations, beliefs, plans, objectives, assumptions, or future events or performance of Novavax, Inc. (“Novavax,” together with its wholly owned subsidiaries, the “Company,” “we,” or “us”) are not historical facts and are forward-looking statements. Such forward-looking statements include, without limitation, statements about our capabilities, goals, expectations regarding future revenue and expense levels, and capital raising activities; our operating plans and prospects, including our ability to continue as a going concern through one year from the date of Novavax’ audited financial statements for the year ended December 31, 2023; our global restructuring and cost reduction plan (“Restructuring Plan”), which includes a more focused investment in our COVID-19 commercial program (which currently includes Nuvaxovid™ prototype COVID-19 vaccine ("NVX-CoV2373” or “prototype vaccine”) and Nuvaxovid™ updated COVID-19 vaccine (“NVX-CoV2601” or “updated vaccine”) collectively referred to as our (“COVID-19 Vaccine”)), potential market sizes and demand for our product candidates; the efficacy, safety, and intended utilization of our product candidates; the development of our clinical-stage product candidates and our recombinant vaccine and adjuvant technologies; the development of our preclinical product candidates; our expectations related to enrollment in our clinical trials; the conduct, timing, and potential results from clinical trials and other preclinical studies; plans for and potential timing of regulatory filings; our expectation of manufacturing capacity, timing, production, distribution, and delivery for our COVID-19 Vaccine by us and our partners; our estimate of the number of individuals who may potentially be reached by our COVID-19 Vaccine; our expectations with respect to the anticipated ongoing development and commercialization or licensure of the COVID-19 Vaccine, ongoing development of COVID-19 variant strain-containing monovalent or bivalent formulation, efforts to expand our COVID-19 Vaccine label worldwide as a booster, and to various age groups and geographic locations; the expected timing, content, and outcomes of regulatory actions; funding from the U.S. government partnership formerly known as Operation Warp Speed under the USG Agreement, the U.S. Department of Defense (“DoD”), and CEPI; funding under our APAs and supply agreements and amendments to, termination of, discussion regarding, or legal disputes relating to any such agreement; our available cash resources and usage and the availability of financing generally; plans regarding partnering activities and business development initiatives; and other matters referenced herein. Generally, forward-looking statements can be identified through the use of words or phrases such as “believe,” “may,” “could,” “will,” “would,” “possible,” “can,” “estimate,” “continue,” “ongoing,” “consider,” “anticipate,” “intend,” “seek,” “plan,” “project,” “expect,” “should,” “would,” “aim,” or “assume,” the negative of these terms, or other comparable terminology, although not all forward-looking statements contain these words.

Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based only on our current beliefs and expectations about the future of our business, future plans and strategies, projections, anticipated events and trends, the economy, and other future conditions. Forward-looking statements involve estimates, assumptions, risks, and uncertainties that could cause actual results or outcomes to differ materially from those expressed or implied in any forward-looking statements, and, therefore, you should not place considerable reliance on any such forward-looking statements. Such risks and uncertainties include, without limitation, our ability to successfully manufacture, distribute, or market our updated COVID-19 vaccine in a single dose vial or pre-filled syringe product presentation for the 2024-2025 vaccination season; challenges satisfying, alone or together with partners, various safety, efficacy, and product characterization requirements, including those related to process qualification, assay validation, and stability testing, necessary to satisfy applicable regulatory authorities; challenges or delays in conducting clinical trials; challenges or delays in obtaining regulatory authorization for our product candidates, including our updated COVID-19 vaccine in time for the 2024-2025 vaccination season or for future COVID-19 variant strain changes; manufacturing, distribution or export delays or challenges; our substantial dependence on Serum Institute of India Pvt.

Ltd. and Serum Life Sciences Limited for co-formulation and filling and PCI Pharma Services for finishing our COVID-19 vaccines and the impact of any delays or disruptions in their operations on the delivery of customer orders; difficulty obtaining scarce raw materials and supplies; resource constraints, including human capital and manufacturing capacity, constraints on the ability of Novavax to pursue planned regulatory pathways, alone or with partners, in multiple jurisdictions simultaneously, leading to staggering of regulatory filings, and potential regulatory actions; challenges in implementing our global restructuring and cost reduction plan; our ability to timely deliver doses; challenges in obtaining commercial adoption and market acceptance of our updated COVID-19 vaccine or any COVID-19 variant strain-containing formulation; challenges meeting contractual requirements under agreements with multiple commercial, governmental, and other entities, including requirements to deliver doses that may require Novavax to refund portions of upfront and other payments previously received or result in reduced future payments pursuant to such agreements; challenges related to the seasonality of vaccinations against COVID-19; and other risks and uncertainties identified in Part I, Item 1A “Risk Factors” of this Annual Report on Form 10-K, which may be detailed and modified or updated in other documents filed with the SEC from time to time, and are available at www.sec.gov and at www.novavax.com. You are encouraged to read these filings as they are made.

We cannot guarantee future results, events, level of activity, performance, or achievement. Any or all of our forward-looking statements in this Annual Report on Form 10-K may turn out to be inaccurate or materially different from actual results. Further, any forward-looking statement speaks only as of the date when it is made, and we undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, unless required by law. New factors emerge from time to time, and it is not possible for us to predict which factors will arise. In addition, we cannot assess the impact of each factor on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements.

Information in this Annual Report on Form 10-K, includes a financial measure that was not prepared in accordance with U.S. generally accepted accounting principles (“GAAP”), which we refer to as adjusted cost of sales. We are presenting this non-GAAP financial measure to assist an understanding of our business and its performance. Adjusted cost of sales includes an estimate of standard manufacturing costs that were previously expensed to research and development prior to regulatory approvals for our COVID-19 Vaccine that would otherwise have been capitalized to inventory. Any non-GAAP financial measures presented are not, and should not be viewed as, substitutes for financial measures required by GAAP, have no standardized meaning prescribed by GAAP, and may not be comparable to the calculation of similar measures of other companies.

We are a biotechnology company that promotes improved global health through the discovery, development, and commercialization of innovative vaccines to prevent serious infectious diseases. Our proprietary recombinant technology platform harnesses the power and speed of genetic engineering to efficiently produce highly immunogenic nanoparticle vaccines designed to address urgent global health needs.

Our vaccine candidates are nanostructures of conformationally correct recombinant proteins that mimic those found on pathogens. This technology enables the immune system to recognize target proteins and develop protective immune responses. We believe that our vaccine technology may lead to the induction of a differentiated immune response that may be more efficacious than naturally occurring immunity or some other vaccine approaches. Our vaccine candidates also incorporate our proprietary saponin-based Matrix-M™ adjuvant to enhance the immune response, stimulate higher levels of functional antibodies, and induce a cellular immune response.

We have developed an updated COVID-19 vaccine for the 2023-2024 vaccination season. In October 2023, the U.S. FDA granted emergency use authorization (“EUA”) for our updated vaccine for active immunization to prevent COVID-19. The updated vaccine is authorized as (1) a single dose in individuals 12 years and older who have been vaccinated with any COVID-19 vaccine at least 2 months after receipt of the last previous dose of COVID-19 vaccine, and (2) a series of 2 doses administered 3 weeks apart to individuals 12 years and older who were not previously vaccinated with any COVID-19 vaccine. Our updated vaccine is available within the U.S. at many major pharmacy retailers. Outside the U.S. for our updated vaccine, in January 2024, we were granted marketing authorization by the United Kingdom’s (“UK”) Medicines and Healthcare products Regulatory Agency (“MHRA”), in December 2023, we were granted expanded authorization by Health Canada, and in October 2023, we were granted approval by the European Commission (“EC”).

We are committed to meeting the full supply of our key target markets through advance purchase agreements (“APAs”) covering such markets. We continue to work closely with regulatory authorities globally for authorization of our updated vaccine. We previously developed a prototype COVID-19 vaccine, which has received full marketing authorization (“MA”), marketing approval, interim authorization, provisional approval, conditional marketing authorization (“CMA”), from multiple regulatory authorities in over 40 countries globally. We continue to progress our regulatory authorizations for our prototype vaccine in select territories, as we believe these may facilitate authorization of our vaccine candidates for updated strains in the future.

Additionally, we are developing a CIC vaccine candidate. In addition to COVID-19, our other areas of focus include providing Matrix-M™ adjuvant for collaborations, including in R21/Matrix-M™ adjuvant malaria vaccine, which recently received authorization in several countries, as well as other preclinical vaccine research with our Matrix-M™ adjuvant, including through a partnership with the Bill & Melinda Gates Medical Research Institute.

We intend to focus the organization to align our investments and activities with our top priority of delivering our updated vaccine for the 2023-2024 vaccination season. To maximize our opportunities and mitigate the significant risks and uncertainties of the COVID-19 market, we have progressed our cost restructuring measures to reduce spend, extend our cash runway, and operate efficiently to seek to best position the Company to deliver longer-term growth. We discuss these cost restructuring strategies in greater detail in Note 2 to our consolidated financial statements in this Annual Report.

U.S. Market: Demonstrated ability to update COVID-19 vaccine and deliver the only protein-based non-mRNA option to market.

•Gained commercial experience in the U.S. after receiving EUA with future efforts to focus on a recalibration of U.S. field teams to focus on the retail segment

•Progressed efforts to position Novavax for a stronger performance in 2024-2025 COVID-19 vaccination season with focus on a single-dose product presentation for delivery at the start of the season and planned BLA approval to enable marketing and promotion for Nuvaxovid™ during season

•Progressed efforts to streamline manufacturing and to advance strain selection at risk while advocating for more timely identification of strains by regulatory authorities

•Continued advancement of discussions for 2024-2025 COVID-19 vaccination season with major retailers who have driven 90% of the pharmacy business

Global Markets: Delivered on 2023 APA obligations in Europe, Canada, Australia, New Zealand, Singapore and Taiwan.

•For 2024, made strategic decision to prioritize and focus commercial effort in Europe on select key countries including Italy, Spain, France and the UK.

•Spring 2024 U.K. private market launch expected for Novavax’s COVID-19 vaccine as enabled by the recent Green Book addition by the UK Health Security Agency

Novavax has made significant progress on its commitment to improve its financial position while maintaining the capabilities that support long-term value creation.

•Reduced full year 2023 operating expenses by $1.1 billion, or 41%, as compared to 2022

•Reduced workforce by a total of 30% compared to first quarter of 2023

•Delivered fourth quarter 2023 doses under the Canada APA agreement and received $175 million contingent payment in January 2024

•Settled arbitration with Gavi, removing financial uncertainty and enabling focus on shared public health mission Novavax remains focused on leveraging its technology platform, including its proprietary Matrix-M™ adjuvant, to drive long-term growth and protect global public health.

•Expect to initiate a pivotal Phase 3 trial for CIC vaccine candidate in the second half of 2024, with potential for accelerated approval and anticipated launch in 2026

•R21/Matrix-M™ adjuvant malaria vaccine received prequalification by the WHO based on Phase 3 efficacy trial results, which were recently published in The Lancet, enabling global rollout of the vaccine in eligible United Nation countries

In August 2023, we entered into an At Market Issuance Sales Agreement (the "August 2023 Sales Agreement"), which allows us to issue and sell up to $500 million in gross proceeds of shares of our common stock, and terminated our then-existing At Market Issuance Sales agreement entered in June 2021 (the “June 2021 Sales Agreement”). During the year ended December 31, 2023, we sold 38.3 million shares of our common stock under our August 2023 Sales Agreement and 7.9 million shares of our common stock under our June 2021 Sales Agreement, resulting in net proceeds of approximately $321 million, of which $6.9 million was included in Prepaid expenses and other current assets as of December 31, 2023 and received in cash in January 2024. As of December 31, 2023, the remaining balance available under the August 2023 Sales Agreement was approximately $242 million.

During the year ended December 31, 2022, we sold 2.2 million shares of our common stock resulting in net proceeds of approximately $179 million, under our June 2021 Sales Agreement.

In August 2023, pursuant to the Securities Subscription Agreement with SK, we agreed to sell and issue to SK 6.5 million shares of our common stock at a price of $13.00 per share (the “Shares”) in a Private Placement for aggregate gross proceeds to us of approximately $84.5 million. We recognized the Shares at the settlement date fair value of $46.5 million (see Note 4 to our consolidated financial statements for additional discussion of the Securities Subscription Agreement with SK). The closing of the Private Placement occurred on August 10, 2023.

In December 2022, we completed a public offering of 7,475,000 shares of our common stock, including 975,000 shares of common stock that were issued upon the exercise in full of the option to purchase additional shares granted to the underwriters, at a price of $10.00 per share resulting in net proceeds, net of offering costs of $4.9 million, of approximately $70 million. We completed this public offering concurrent with the issuance of the 2027 Notes (see Note 10 to our consolidated financial statements).

The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of our consolidated financial statements requires us to make estimates, assumptions, and judgments that affect the reported amounts of assets, liabilities, and equity and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. These estimates, particularly estimates relating to accounting for product sales revenue, pre-launch inventory, inventory realizability, and research and development expenses have a material impact on our consolidated financial statements and are discussed in detail throughout our analysis of the results of operations discussed below. We base our estimates on historical experience and various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets, liabilities, and equity that are not readily apparent from other sources. Actual results and outcomes could differ from these estimates and assumptions.

For an in-depth discussion of each of our significant accounting policies, including our critical accounting policies and further information regarding estimates and assumptions involved in their application, see Note 2 to the accompanying consolidated financial statements included in Part II, Item 8, “Financial Statements and Supplementary Data” of this Annual Report on Form 10-K.

Product sales include sales associated with COVID-19 Vaccine supply agreements, sometimes referred to as advance purchase agreements (“APAs”), with various international governments. We recognize revenue from product sales related to these APA’s based on the transaction price per dose calculated in accordance with Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers, at the point in time when control of the product transfers to the customer and customer acceptance has occurred, unless such acceptance provisions are deemed perfunctory. The APAs typically contain terms that include upfront payments which are reflected in Deferred revenue. We constrain the transaction price for APA’s until it is probable that a significant reversal in revenue recognized will not occur. Specifically, if an APA includes a provision whereby the customer may request a discount, return, or refund, or includes a term that may have the effect of decreasing the price per dose of previously delivered shipments, revenue is constrained based on an estimate of the impact of the transaction price until it is probable that a significant reversal in revenue recognized will not occur.

In the fourth quarter of 2023, we commenced sales of COVID-19 Vaccine to the U.S. commercial market. Product sales in the U.S. are primarily made through large pharmaceutical wholesale distributors at the wholesale acquisition cost (“WAC”). We recognize revenue upon title transfer (which is typically at time of delivery), provided all other revenue recognition criteria have been met. The transaction price includes estimates of variable consideration for which reserves are established that primarily result from invoice discounts for prompt payment, wholesale distributor fees, chargebacks, and product returns (collectively, “gross-to-net deductions”). These estimates are based on the amounts earned or to be claimed for related sales and are classified as either reductions of gross accounts receivable or a current liability based on the nature of the estimate, the expected settlement method, and net position by individual customer. Where appropriate, these estimates are based on factors such as industry data and forecasted customer buying and payment patterns, our experience, current contractual and statutory requirements, specific known market events, and trends. Variable consideration is included in the transaction price only to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. If actual results vary from estimates, we will adjust the estimates, which would affect product sales in the period such variances become known.

•Wholesale distributor fees, discounts, and chargebacks: We have arrangements under which our indirect customers such as retailers and healthcare providers receive discounts to the WAC. The chargeback represents the difference between the WAC and this negotiated discounted price. For distribution and related services, we pay service fees to our wholesale distributors. In addition, we typically offer wholesale distributor customers invoice discounts on product sales for prompt payments. We estimate chargebacks, discounts, and fees we will owe and deduct these amounts from gross product sales at the time the revenue is recognized based on the contractual terms and our expectations regarding future customer behaviors.

•Product returns: We offer U.S. customers the right to return COVID-19 Vaccine. These return rights include the right of wholesale distributors to return unsold and expired doses and the right of indirect customers to return any partial or unused vials upon expiry. Estimated returns for COVID-19 Vaccine are determined considering levels of inventory in the distribution channel, projected market demand, utilization data, returns claims received, and product shelf life. Our estimates of product returns are subject to significant uncertainty. Actual customer product returns could vary significantly from our estimates, resulting in changes to the estimates in subsequent periods. The estimated amount for product returns is deducted from gross product sales in the period the related product sales are recognized.

•Other: Fees payable to retailers, healthcare providers, and buying groups, including certain patient assistance programs, are deducted from gross product sales in the period the related product sales are recognized.

During the year ended December 31, 2023, we recognized gross-to-net deductions against U.S. commercial product sales of $84.7 million for product returns and $47.0 million for wholesale distributor fees, discounts and chargebacks. As of December 31, 2023, $82.5 million related to product returns and $20.6 million related to wholesale distributor fees, discounts, and chargebacks were included in Other current liabilities and $2.6 million was included in Accounts receivable on our consolidated balance sheet.

We capitalize raw materials and production costs as inventory when we determine that commercialization of a product is probable and have a present right to the economic benefit associated with the product. Our estimate of when commercialization is probable is based primarily on our experience with obtaining regulatory approval of comparable products. We began to capitalize inventory in 2022.

We periodically analyze our inventories for excess amounts or obsolescence and write down obsolete or otherwise unmarketable inventory to its estimated net realizable value. We estimate excess or obsolete inventory and losses on firm purchase commitments of inventory quarterly based on multiple factors, including assumptions about expected future demand and market conditions, current sales orders, and product expiry dates. Our assumptions about expected future demand are inherently uncertain and if we were to change any of these judgments or estimates, it could cause a material increase or decrease in the amount of inventory write down that we report in a particular period. We began to capitalize inventory in 2022. Subsequently, for the year ended, December 31, 2022 we recorded inventory write-downs of $447.6 million and losses on firm purchase commitments of inventory of $155.9 million to the extent the cost cannot be recovered based on estimates about future demand. For the year ended December 31, 2023, we recorded inventory write-downs of $72.4 million and losses on firm purchase commitments of inventory of $73.5 million. In addition, for the year ended December 31, 2023, we recorded recoveries on firm purchase commitments of $40.2 million related primarily to negotiated reductions to previously recognized firm purchase commitments.

We estimate our prepaid and accrued expenses related to our research and development activities using a process that involves reviewing contracts and purchase orders, communicating with our project managers and service providers to identify services that have been performed on our behalf, and estimating the level of service performed and the associated cost incurred for the service when we have not yet been invoiced or for which we have been invoiced in advance of the service. This estimation process includes a review of:

•expenses incurred under agreements with contract research organizations (“CROs”) that conduct our clinical trials and third party consultants; and

•the cost of developing and manufacturing vaccine components under third-party CMOs and contract development and manufacturing organizations (“CDMOs”) agreements, including expenses incurred for the procurement of raw materials, laboratory supplies and equipment.

We base our expenses on our estimates of the services provided and efforts expended pursuant to contracts, statements of work and related change orders with the service provider, and discussion with internal personnel and external service providers as to the progress of the services and the agreed-upon fee to be paid for such services. The financial terms of these agreements are based on negotiated terms, vary from contract to contract, and may result in an uneven level of activity over time. There may be instances in which payments made to our vendors will exceed the level of services provided and result in a prepayment of the expense. Additionally, invoicing from third-party service providers may not coincide with actual work performed and can result in a prepaid or an accrual position at the end of the period. The estimation process requires us to make significant judgments and estimates in determining the services incurred as of the balance sheet date, which may result in either a prepaid or an accrual balance. As actual costs become known, we adjust our estimates. Although we do not expect our estimates to be materially different from amounts actually incurred, our understanding of the status and timing of services performed may vary from the related estimates and could result in us reporting amounts that are too high or too low in a particular period. Our prepaid and accrued expenses are dependent, in part, upon the receipt of timely and accurate reporting from CROs, CMOs, CDMOs, and third-party service providers. Due to the nature of the estimation process, there may be a difference between estimated costs and actual costs incurred. Historically, we have not experienced any material differences in prior periods.

See “Note 2―Summary of Significant Accounting Policies” included in our Notes to Consolidated Financial Statements (under the caption “Recent Accounting Pronouncements”).

The following is a discussion of our historical consolidated financial condition and results of operations, and should be read in conjunction with the consolidated financial statements and notes thereto set forth in this Annual Report on Form 10-K. Additional information concerning factors that could cause actual results to differ materially from those in our forward-looking statements is described under Part I, Item 1A, “Risk Factors” of this Annual Report on Form 10-K.

For our discussion of the year ended December 31, 2022, compared to the year ended December 31, 2021, please read Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations located in Annual Report on Form 10-K for the year ended December 31, 2022.

Revenue for the year ended December 31, 2023 was $983.7 million as compared to $2.0 billion for the year ended December 31, 2022, a decrease of $1.0 billion. Revenue for the years ended December 31, 2023 and 2022 was primarily comprised of revenue from product sales of COVID-19 Vaccine and services performed under our U.S. government agreement with Advanced Technology International (“USG Agreement”), the Consortium Management Firm acting on behalf of the Medical CBRN Defense Consortium in connection with the partnership formerly known as Operation Warp Speed. The decrease in revenue is primarily due to a decreased quantity of dose sales of COVID-19 Vaccine.

Product sales for 2023 were $531.4 million as compared to $1.6 billion for 2022, a decrease of $1.0 billion. The decrease in product sales is primarily due to a decreased quantity of dose sales of COVID-19 Vaccine during the year ended December 31, 2023 as compared to 2022. Product sales for 2023 related to revenue from commercial sales of COVID-19 Vaccine, which commenced in 2022. The geographic distribution of product sales in 2023 was as follows:

We recognized grant revenue as follows:

Grant revenue for 2023 was $427.3 million compared to $382.9 million for 2022, an increase of $44.4 million. Grant revenue comprised revenue for services performed under our USG Agreement. The increase was primarily due to increased support activities under the USG Agreement during 2023. As of December 31, 2023, the Company has recognized the full contract funding under the USG Agreement in revenue.

Royalties and other includes royalty milestone payments, sales-based royalties, and Matrix-M™ adjuvant sales. Royalties and other revenue for 2023 was $25.0 million as compared to $44.0 million for 2022, a decrease of $19.0 million. The decrease was primarily due to decreased revenue related to milestone payments, partially offset by an increase in Matrix-M™ adjuvant sales.

Cost of sales was $343.8 million, or 65% of product sales, for the year ended December 31, 2023, including expense of $145.9 million related to excess, obsolete, or expired inventory and losses on certain firm purchase commitments, $6.1 million ROU asset impairment charges for CMO manufacturing capacity of excess quantities, $64.0 million related to unutilized manufacturing capacity, and a credit of $40.2 million related to negotiated reductions to certain previously recognized firm purchase commitments. Cost of sales was $902.6 million, or 58% of product sales, for 2022, including expense of $603.5 million related to excess, obsolete, or expired inventory and losses on firm purchase commitments. Prior to receiving approval, we expensed manufacturing costs as research and development expenses. After receiving approval, we capitalize the costs of production for a particular supply chain when we determine that we have a present right to the economic benefit associated with the product. While we tracked the quantities of our manufactured vaccine product and components, we did not track pre-approval manufacturing costs and therefore the manufacturing cost of our pre-launch inventory produced prior to approval is not reasonably determinable. If inventory sold during 2023 was valued at expected standard cost, including expenses related to excess and obsolete inventory, adjusted cost of sales for the year would have been $382.8 million, an adjustment of $39.0 million as compared to cost of sales recognized. If inventory sold during 2022 was valued at expected standard cost, adjusted cost of sales for the year would have been approximately $1.1 billion, an adjustment of $164.8 million. The cost of sales as a percentage of product sales may fluctuate in the future as a result of changes to our customer mix or standard costs.

Research and development expenses decreased to $737.5 million for 2023 as compared to $1.2 billion for 2022, a decrease of $497.8 million. The decrease was primarily due to a reduction in overall expenditures relating to development activities on coronavirus vaccines, including our COVID-19 Vaccine and CIC, as summarized in the table below (in thousands):

Research and development expenses for coronavirus vaccines for the year ended December 31, 2023 and 2022 decreased to $413.4 million from $848.0 million primarily as a result of a reduction in manufacturing and support costs due, in part, to a reduction in our global manufacturing footprint consistent with our contractual obligations to supply, and anticipated demand for, COVID-19 Vaccine, including under manufacturing supply agreements with CMOs and CDMOs, and a reduction in clinical study costs and the commercialization of internal manufacturing capabilities. The decrease was also due to a benefit of $57.7 million during the year ended December 31, 2023 resulting from our settlement agreement and Private Placement with SK (see Note 4 to our consolidated financial statements). The decrease was partially offset by a benefit of $35.2 million and $201.4 million for the years ended December 31, 2023 and 2022, respectively, related to previously accelerated manufacturing costs for leases that we determined were embedded in manufacturing supply agreements with CMOs and CDMOs.

We do not provide forward-looking estimates of costs and time to complete our research programs due to the many uncertainties associated with vaccine development. As we obtain data from preclinical studies and clinical trials, we may elect to discontinue or delay clinical trials in order to focus our resources on more promising vaccine candidates. Completion of clinical trials may take several years or more, but the length of time can vary substantially depending upon the phase, size of clinical trial, primary and secondary endpoints, and the intended use of the vaccine candidate. The cost of clinical trials may vary significantly over the life of a project as a result of a variety of factors, including:

•the number of participants who participate in the clinical trials;

•the number of sites included in the clinical trials;

•if clinical trial locations are domestic, international, or both;

•the time to enroll participants;

•the duration of treatment and follow-up;

•the safety and efficacy profile of the vaccine candidate; and

•the cost and timing of, and the ability to secure, regulatory approvals.

As a result of these uncertainties, we are unable to determine the duration and completion costs of our research and development projects or when, and to what extent, we will generate future cash flows from our research projects.

For 2024, we expect research and development expenses to decrease as compared to 2023 as we continue to assess our manufacturing needs and modify our global manufacturing footprint consistent with our contractual obligations to supply, and anticipated demand for, COVID-19 Vaccine and as additional manufacturing activities that were previously recognized as research and development expenses begin to meet the criteria for capitalization as inventory.

Selling, general, and administrative expenses decreased to $468.9 million for 2023 from $488.7 million for 2022, a decrease of $19.7 million. The decrease in selling, general, and administrative expenses is primarily due to cost containment measures to reduce our operating spend including a decrease in professional fees and advertising and promotion costs in support of our COVID-19 commercial program, partially offset by restructuring expenses.

We had total net other income of $23.5 million for 2023 compared to total net other expense of $8.9 million for 2022, an increase of $32.4 million. During 2023, other income, net increased primarily due to the favorable impact in 2023 as compared to 2022 of exchange rates on foreign currency denominated balances, including an intercompany loan with Novavax CZ, and an increase in investment income due to higher interest rates.

During the years ended December 31, 2023 and 2022, we recognized $2.0 million and $4.3 million of income tax expense, respectively, related to federal, state, and foreign income taxes.

Net loss for 2023 was $545.1 million, or $5.41 per share, as compared to $657.9 million, or $8.42 per share, for 2022, a decrease of $112.9 million, or $3.01 per share. The decrease in net loss was primarily due to the decline in cost of sales and research and development expenses associated with our COVID-19 Vaccine, partially offset by a decrease in revenue from product sales.

The increase in weighted average shares outstanding for 2023 is primarily a result of sales of our common stock.

Our future capital requirements depend on numerous factors including, but not limited to, revenue from our product sales and royalties under licensing arrangements with our strategic partners; repayments under our grant agreements; our projected activities related to the development and commercial support of our COVID-19 Vaccine and our CIC vaccine candidate, including significant commitments under various CRO, CMO, and CDMO agreements; the progress of preclinical studies and clinical trials; the time and costs involved in obtaining regulatory approvals; the costs of filing, prosecuting, defending, and enforcing patent claims and other intellectual property rights; and other manufacturing, sales, and distribution costs. We plan to continue developing other vaccines and product candidates, such as our potential combination vaccines candidates, which are in various stages of development.

We have entered into supply agreements, sometimes referred to as APAs, with the EC and various countries globally. We also have license agreements. As of December 31, 2023, the aggregate amount of the transaction price allocated to performance obligations that were unsatisfied (or partially unsatisfied), excluding amounts related to sales-based royalties under the licensing agreements, was approximately $2 billion, of which $863.5 million is included in Deferred revenue on our consolidated balance sheet.

Failure to timely meet regulatory milestones, or achieve product volume or delivery timing obligations under our APAs may require us to refund portions of upfront or other payments or result in reduced future payments, which could adversely impact our ability to realize revenue from our unsatisfied performance obligations. The timing to fulfill performance obligations related to supply agreements will depend on timing of product manufacturing, receipt of marketing authorizations for additional indications, delivery of doses based on customer demand, and the ability of the customer to request variant vaccine in place of the prototype vaccine under certain of our APAs. The supply agreements typically contain terms that include upfront payments intended to assist us in funding investments related to building out and operating our manufacturing and distribution network, among other expenses, in support of our global supply commitment, and are applied to billings upon delivery of COVID-19 Vaccine. Such upfront payments generally become non-refundable upon our achievement of certain development, regulatory, and commercial milestones.

On October 3, 2023, our updated vaccine received EUA from the U.S. FDA for active immunization to prevent COVID-19 in individuals aged 12 and older. Immediately upon authorization, our updated vaccine has also been included in the recommendations issued by the CDC in September 2023. Doses became available within the U.S. at many major pharmacy retailers, following the Center for Biologics Evaluation and Research release of vaccine batches. We have established reserves for gross-to-net deductions for amounts that we expect to return to our customers. As of December 31, 2023, gross-to-net reserve balances are $84.6 million related to product returns and $21.1 million related to wholesale distributor fees, discounts, and chargebacks, of which $103.1 million is included in Accrued expenses and $2.6 million is included in Accounts receivable on our consolidated balance sheet.

Pursuant to the Fujifilm Settlement Agreement (see Note 4 to our consolidated financial statements), we agreed to pay up to $185.0 million (the “Settlement Payment”) to Fujifilm in connection with the cancellation of manufacturing activity at FDBT under the Fujifilm CSA, of which (i) $47.8 million, constituting the initial reservation fee under the CSA, was credited against the Settlement Payment on September 30, 2022 and (ii) the remaining balance was to be paid in four equal quarterly installments of $34.3 million each, which began on March 31, 2023. Under the Fujifilm Settlement Agreement, the final two quarterly installments due to Fujifilm were subject to Fujifilm’s obligation to use commercially reasonable efforts to mitigate losses associated with the vacant manufacturing capacity caused by the termination of manufacturing activities at FDBT under the CSA. Any replacement revenue achieved by Fujifilm’s mitigation efforts between July 1, 2023 and December 31, 2023 would offset the final two settlement payments owed by the Company. On October 2, 2023, we sent a notice of breach under the Fujifilm Settlement Agreement to Fujifilm setting forth the Company’s position that Fujifilm had not used commercially reasonable efforts to mitigate losses. We withheld two installments of $34.3 million due to Fujifilm on September 30, 2023 and December 31, 2023, pending resolution of the issues identified in the notice of breach. We paid the first two installments totaling $68.6 million during the twelve months ended December 31, 2023, and the remaining balance of $68.6 million is reflected in Accrued expenses on our consolidated balance sheet. On October 30, 2023, FDBT filed a demand for arbitration with Judicial Arbitration and Mediation Services (“JAMS”) seeking payment of the third quarter installment of the Settlement Payment.

In August 2023, we entered into a Settlement Agreement and General Release (the “Settlement Agreement”) with SK regarding the mutual release by the parties of all claims arising from or in relation to certain statements of work (“SOWs”) under the Development and Supply Agreement entered into in August 2020 and the Collaboration and License Agreement, entered into in February 2021 as amended in December 2021 and July 2022 in connection with the cessation of all drug substance and drug product manufacturing activity at SK for supply to us. Pursuant to the Settlement Agreement, we agreed to pay $149.8 million, of which (i) $130.4 million was paid in August 2023 and (ii) the remaining balance was paid in November 2023. Under the Settlement Agreement, we also agreed with SK to a wind down plan with respect to the remaining products, materials and equipment under the SOWs (see Note 4 to our consolidated financial statements).

In August 2023, we entered into a Securities Subscription Agreement (the “Subscription Agreement”) with SK, pursuant to which we agreed to sell and issue to SK, in a private placement (the “Private Placement”), 6.5 million shares of our common stock, par value $0.01 per share at a price of $13.00 per share for aggregate gross proceeds to us of approximately $84.5 million. The closing of the Private Placement occurred on August 10, 2023 (see Note 4 to our consolidated financial statements).

We have an APA with the Commonwealth of Australia for the purchase of doses of COVID-19 Vaccine (the “Australia APA”). In April 2023, we amended the Australia APA to reduce the number of doses to be delivered with a commensurate increase in the per-dose price, such that the total contract value of the Australia APA is maintained with doses to be delivered through 2024. In May 2023, we extended a credit for certain doses delivered in 2022 to Australia that qualified for replacement under the Australia APA. This credit is the result of a single lot sold to the Australian government that upon pre-planned 6-month stability testing was found to have fallen below the defined specifications and the lot therefore was removed from the market.

The credit will be applied against the future sale of doses to Australia. In July 2023, we amended the Australia APA to provide for replacement doses and to extend the delivery schedule through 2025. As of February 2024, we had not yet received TGA authorization or delivered doses as contemplated in the July 2023 amendment and are in active discussions with the Australian government on both the TGA authorization and delivery of the doses previously scheduled for the fourth quarter of 2023. In February 2024, we received notice from the Australian government purporting to cancel its order for such prototype vaccine doses. We believe the cancellation was not proper under the amended Australia APA. However, if such a cancellation were determined to be allowable, $6.0 million of the deferred revenue would become a credit towards future deliveries of doses and approximately $48 million of the contract value related to future deliverables would no longer be available.

In April 2023, we amended the Canada APA, pursuant to which the Canadian government forfeited certain doses originally scheduled for delivery in 2022 for a payment of $100.4 million, which we received in the second quarter of 2023. In June 2023, we entered into an additional amendment (the “June 2023 Amendment”) to the Canada APA. Pursuant to the June 2023 Amendment, (i) the Canadian government forfeited certain doses of COVID-19 Vaccine previously scheduled for delivery and agreed to pay a total amount of $349.6 million to us in two equal installments, which total amount equaled the remaining balance owed by the Canadian government with respect to such forfeited vaccine doses, (ii) the amount of doses of COVID-19 Vaccine due for delivery was reduced, (iii) the delivery schedule for the remaining doses of COVID-19 Vaccine to be delivered was revised, and (iv) the parties agreed Novavax would use the Biologics Manufacturing Centre (“BMC”) Inc. to produce bulk antigen for doses in 2024 and 2025. The June 2023 Amendment maintained the total contract value of the original Canada APA. The first Installment of $174.8 million was payable upon execution of the June 2023 Amendment and received by Novavax in July 2023, and the second installment of $174.8 million was contingent and payable upon the delivery of vaccine doses in the second half of 2023 and received by Novavax in January 2024. The Canadian government may terminate the Canada APA, as amended, if we fail to receive regulatory approval for our COVID-19 Vaccine using bulk antigen produced at BMC on or before December 31, 2024. Our 2024 plans do not currently anticipate the submission for regulatory approval of our COVID-19 Vaccine using bulk antigen produced at BMC, and we plan to work with the Canadian government on an amendment that addresses possible alternatives, which may not be achievable. As of December 31, 2023, $102.8 million was classified as short-term Deferred revenue and $485.3 million was classified as long-term Deferred revenue with respect to the Canadian APA on our consolidated balance sheet. If the Canadian government terminates the Canada APA, $28.0 million of the deferred revenue would become refundable and approximately $224 million of the contract value related to future deliverables would no longer be available (see Note 3 to our consolidated financial statements). In the event that the contract is terminated, we would consider competing in the Canadian commercial market. Pursuant to the June 2023 Amendment, we and the Canadian government will endeavor to expand our previously agreed in-country commitment to Canada and to partner to provide health, economic, and future pandemic preparedness benefits to Canada, which value may be provided through a number of activities, including without limitation, capital investments, the performance of activities or services, or the provision of technology or intellectual property licenses. Further, the parties will endeavor to enter into a memorandum of understanding (the “MOU”) to illustrate our ability to deliver such benefits over a 15-year period with an aggregate value of not less than 100% of the amount remaining to be paid under the June 2023 Amendment and ultimately received by us. As of December 31, 2023, discussions regarding the MOU were ongoing. We agreed to hold $20.0 million of the second installment payment received in January 2024 in escrow for the benefit of the Canadian government, which amount is the sole recourse available to the Canadian government in the event of non-performance under the MOU.

In September 2022, we entered into an Amended and Restated SARS-CoV-2 Vaccine Supply Agreement (the “Amended and Restated UK Supply Agreement”) with the Authority. Under the terms of the Amended and Restated UK Supply Agreement, the Authority agreed to purchase a minimum of 1 million doses and up to an additional 15 million doses (the “Conditional Doses”) of our prototype vaccine, with the number of Conditional Doses contingent on, and subject to reduction based on, our timely achievement of supportive recommendations from the JCVI that is approved by the UK Secretary of State for Health. If the Authority did not purchase the Conditional Doses or the number of such Conditional Doses was reduced below 15 million doses of our prototype vaccine, we would have to repay up to $225.0 million related to the upfront payment previously received from the Authority under the Original UK Supply Agreement. Under the Amended and Restated UK Supply Agreement, the Authority also has the option to purchase up to an additional 44 million doses, in one or more tranches, through 2024.

As of November 30, 2022, the JCVI had not made a supportive recommendation with respect to our prototype vaccine, thereby triggering, under the terms of the Amended and Restated UK Supply Agreement, (i) a reduction of the number of Conditional Doses from 15 million doses to 7.5 million doses, which reduced number of Conditional Doses are contingent on, and subject to further reduction based on, our timely achievement by November 30, 2023 of a supportive recommendation from JCVI that is approved by the UK Secretary of State for Health as described in the paragraph above, and (ii) an obligation for us to repay $112.5 million related to the upfront payment previously received from the Authority under the Original UK Supply Agreement.

In April 2023, we repaid the $112.5 million related to the November 30, 2022 triggering event. As of November 30, 2023, the JCVI had not made a supportive recommendation with respect to the prototype vaccine, thereby triggering a reduction in the number of Conditional Doses from 7.5 million doses to zero. As of February 2024, the Company is in discussions with the Authority regarding the treatment of the remaining upfront amount previously received of $112.5 million, which is reflected in Other current liabilities on our consolidated balance sheet.

Under the terms of the Gavi APA, we received an upfront payment of $350.0 million from Gavi in 2021 and an additional payment of $350.0 million in 2022 related to our achieving EUL for our prototype vaccine by the WHO (the “Advance Payment Amount”). On November 18, 2022, we delivered written notice to Gavi to terminate the Gavi APA on the basis of Gavi’s failure to procure the purchase of 350 million doses of our prototype vaccine from us as required by the Gavi APA. As of November 18, 2022, we had only received orders under the Gavi APA for approximately 2 million doses. On December 2, 2022, Gavi issued a written notice purporting to terminate the Gavi APA based on Gavi’s contention that the Company repudiated the agreement and, therefore, materially breached the Gavi APA. Gavi also contended that, based on its purported termination of the Gavi APA, it was entitled to a refund of the Advance Payment Amount less any amounts that have been credited against the purchase price for binding orders placed by a buyer participating in the COVAX Facility. As of December 31, 2023, the remaining Gavi Advance Payment Amount of $696.4 million, pending resolution of the dispute with Gavi related to a return of the remaining Advance Payment Amount, was reclassified from Deferred revenue to Other current liabilities on our consolidated balance sheet. On January 24, 2023, Gavi filed a demand for arbitration with the International Court of Arbitration based on the claims described above. We filed our Answer and Counterclaims on March 2, 2023. On April 5, 2023, Gavi filed its Reply to our Counterclaims. On February 16, 2024, we and Gavi entered into a Termination and Settlement Agreement (the “Gavi Settlement Agreement”) terminating the Gavi APA, settling the arbitration proceedings, and releasing both parties of all claims arising from, under or otherwise in connection with the Gavi APA. Pursuant to the Gavi Settlement Agreement, we are responsible for payment to Gavi of (i) an initial settlement payment of $75 million, which we paid on February 20, 2024, and (ii) deferred payments, in equal annual amounts of $80 million payable each calendar year through a deferred payment term ending December 31, 2028. The deferred payments are due in variable quarterly installments beginning in the first quarter of 2024 and total $400 million during the deferred payment term. Such deferred payments may be reduced through Gavi’s use of an annual vaccine credit equivalent to the unpaid balance of such deferred payments each year, which may be applied to qualifying sales of any of our vaccines funded by Gavi for supply to certain low-income and lower-middle income countries. We have the right to price the vaccines offered to such low-income and lower-middle income countries at our discretion, and, when utilized by Gavi, we will credit the actual price per vaccine paid against the applicable credit. We intend to price vaccines offered via the tender process, consistent with our shared goal with Gavi to provide equitable access to those countries. Also in the Gavi Settlement Agreement, we grant Gavi an additional credit of up to $225 million, which may be applied against any additional qualifying sales, exceeding the $80 million deferred payment amount in any calendar year, of our vaccines in such countries during such deferred payment term. In addition, we and Gavi entered into a security agreement pursuant to which we granted Gavi a security interest in accounts receivable from SIIPL under the SIIPL R21 Agreement (see Note 4 to our consolidated financial statements for more details on SIIPL R21 Agreement), which will continue for the deferred payment term of the Gavi Settlement Agreement. On February 22, 2024, the claims and counterclaims were dismissed with prejudice.

Our funding agreements currently include funding from CEPI in the form of one or more forgivable no interest term loans (“CEPI Forgivable Loan Funding”). Payments received under the CEPI Forgivable Loan Funding are only repayable if project vaccine, as defined under the CEPI funding agreement, manufactured by the CMO network funded by CEPI is sold to one or more third parties (which could include sales credited under the Gavi Settlement Agreement), and such sales cover our costs of manufacturing such vaccine, not including manufacturing costs funded by CEPI. The timing and amount of any loan repayments is currently uncertain.

We continue to assess our manufacturing needs and modify our global manufacturing footprint consistent with our contractual obligations to supply, and anticipated demand for, COVID-19 Vaccine, and in doing so recognize that significant costs may be incurred. For the 2023-2024 vaccination season, we depend exclusively on SIIPL and SLS for co-formulation and filling (other than in Europe), and PCI Pharma Services for finishing COVID-19 Vaccine in Europe. For the 2024-2025 vaccination season, we are seeking to expand our supply chain network and introduce new single-dose vial or pre-filled syringe product presentations in certain markets. Any delays or disruptions in these suppliers’ operations could prevent or delay the delivery of customer orders.

As of December 31, 2023, we had $583.8 million in cash and cash equivalents and restricted cash as compared to $1.3 billion as of December 31, 2022.

We funded our operations in 2023 primarily with cash and cash equivalents, upfront payments under APAs, revenue from product sales, royalties under licensing arrangements with our strategic partners, and proceeds from the sale of common stock, together with revenue under the USG Agreement that support our COVID-19 Vaccine development activities. In May 2023, we announced our plan to restructure our global footprint to reduce our planned expenditures and in January 2024, we announced further reductions in our global workforce. We anticipate our future operations to be funded primarily by revenue from product sales, our cash and cash equivalents, and other potential funding sources including equity financings, which may include at the market offerings under our August 2023 Sales Agreement, debt financings, collaborations, strategic alliances, asset sales, and marketing, distribution or licensing arrangements.

The following table summarizes cash flows for 2023 and 2022:

Net cash used in operating activities was $714.0 million for 2023, as compared to cash used in operating activities of $415.9 million in 2022. The increase in cash used in operating activities is primarily due to the timing of payments to vendors and cash receipts from customers, primarily APAs.

Net cash used in investing activities was $58.8 million for 2023, as compared to $93.0 million in 2022. The decrease in cash used in investing activities is primarily due to lower expenditures on equipment and leasehold improvements. Capital expenditures for the years ended December 31, 2023 and 2022 were $53.8 million and $89.1 million, respectively.

Net cash provided by financing activities was $4.5 million for 2023, as compared to $325.0 million in 2022. The decrease in cash provided by financing activities is primarily due to the repayment of our 3.75% Convertible notes of $325.0 million in 2023 as compared to gross proceeds of $175.3 million through the issuance of our 2027 Notes in 2022, partially offset by an increase in net proceeds from the sales of our common stock under our June 2021 and August 2023 Sales Agreements and the Private Placement with SK in 2023.

The accompanying consolidated financial statements in Part II, Item 8, “Financial Statements and Supplementary Data,” of this Annual Report on Form 10-K have been prepared assuming that we will continue as a going concern within one year after the date that the financial statements are issued and contemplates the realization of assets and satisfaction of liabilities in the ordinary course of business. The consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of the uncertainty described below. At December 31, 2023, we had $568.5 million in cash and cash equivalents and had a working capital deficiency. During 2023, we incurred a net loss of $545.1 million and had net cash flows used in operating activities of $714.0 million.

In accordance with ASC Topic 205-40, Presentation of Financial Statements - Going Concern, we evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year after the date that these consolidated financial statements are issued. While our current cash flow forecast for the one-year going concern look forward period estimates that we have sufficient capital available to fund operations, this forecast is subject to significant uncertainty, including as it relates to revenue for the next twelve months and our ability to execute on certain cost-reduction initiatives. Our revenue projections depend on our ability to successfully develop, manufacture, distribute, or market our COVID-19 Vaccine for the 2024-2025 vaccination season, which is inherently uncertain and subject to a number of risks, including our ability to obtain regulatory authorizations, introduce a single-dose vial or pre-filled syringe product presentation for the U.S. commercial and certain other markets, the incidence of COVID-19 during the 2024-2025 vaccination season, our ability to timely deliver doses and commercial adoption and market acceptance of our updated vaccine.

Further, failure to meet regulatory milestones or achieve product volume or delivery timing obligations under our advance purchase agreements may require us to refund portions of upfront and other payments or result in reduced future payments which could adversely affect our ability to continue as a going concern.

Management believes that, given our history of recurring losses, negative working capital and accumulated deficit, conditions or events exist that raise substantial doubt about our ability to continue as a going concern through one year from the date that these financial statements are issued. Our plans to alleviate the conditions that exist include restructuring and cost reduction measures and successful execution of its commercial plans.

In May 2023, we announced our Restructuring Plan, which includes a more focused investment in our COVID-19 Vaccine, reduction to our pipeline spending, the continued rationalization of our manufacturing network, a reduction to our global workforce, as well as the consolidation of facilities, and infrastructure. In our May 2023 announcement, the workforce reduction plan included an approximately 25% reduction in the Company’s global workforce, comprised of an approximately 20% reduction in full-time Company employees and the remainder comprised of contractors and consultants. We incurred one time restructuring expenses of $14.6 million during the twelve months ended December 31, 2023. See Note 17 to our consolidated financial statements for more details on restructuring. We expect the full annual impact of the cost savings to be realized in 2024 due to timing of implementing the measures, and the applicable laws, regulations, and other factors in the jurisdictions in which we operate.

In November 2023, we announced that we anticipated further reducing our research and development and selling, general and administrative expenses and our supply network costs. We intend to prioritize improvements to our long-term supply chain efficiency. In January 2024, as part of reducing combined research and development and selling. general and administrative expenses, we announced an approximately 12% reduction of our global workforce, comprised of an approximately 9% reduction in our full-time employees and the remainder comprised of contractors and consultants. We expect the full annual impact of the cost savings to be realized in 2025 and approximately 85% of the annual impact, excluding one-time charges, to be realized in 2024 due to the timing of implementing the measures and the applicable laws, regulations and other factors in the jurisdictions in which it operates. We expect to record a charge of approximately $4 million to $7 million related to one-time employee severance and benefit costs, the majority of which is expected to be incurred in the first quarter of 2024. Upon completion, our resulting workforce is expected to be approximately 30% lower as compared to the end of the first quarter of 2023.

Our plans may include raising additional capital through a combination of equity financings, which may include at the market offerings under our August 2023 Sales Agreement, debt financings, collaborations, strategic alliances, asset sales and marketing, distribution, or licensing arrangements. New financings may not be available to us on commercially acceptable terms, or at all. Also, any collaborations, strategic alliances, asset sales and marketing, distribution, or licensing arrangements may require us to give up some or all of our rights to a product or technology, which in some cases may be at less than the full potential value of such rights. If we are unable to obtain additional capital, we will assess our capital resources and may be required to delay, reduce the scope of, or eliminate some or all of our operations, or further downsize our organization, any of which may have a material adverse effect on our business, financial condition, results of operations, and ability to operate as a going concern.

Due to the uncertainties associated with our plans, there is substantial doubt about our ability to continue as a going concern for at least one year from the date that these financial statements are issued.

The following table summarizes our contractual obligations as of December 31, 2023 (in thousands):

(1)    In 2022, we issued $175.3 million of 5.00% convertible senior unsecured notes due in 2027. See “Note 10—Long-term Debt” included in our Notes to Consolidated Financial Statements for additional information related to our convertible notes.

(2)    Purchase commitments primarily represent our non-cancelable fixed payment obligations under certain CMO, CDMO, and laboratory supply agreements that we are not contractually able to terminate for convenience. Certain agreements provide for termination rights subject to termination fees. Under such agreements, we are contractually obligated to make payments to vendors, mainly to reimburse them for their estimated unrecoverable expenses incurred. As of December 31, 2023, these agreements are active ongoing arrangements and we expect to receive value from these arrangements in the future. The amount of such obligations is dependent on the timing of termination and the terms of the relevant agreement, and cannot be reasonably estimated. Our current obligations under non-cancelable purchase agreements are reflected on our consolidated balance sheets.

In addition to the above obligations, we enter into a variety of agreements and financial commitments in the normal course of business. The terms generally allow us the option to cancel, reschedule, or adjust our requirements based on our business needs, prior to the delivery of goods or performance of services. It is not possible to predict the maximum potential amount of future payments under these agreements due to the conditional nature of our obligations and the unique facts and circumstances involved in each particular agreement.

We are subject to certain risks that may affect our results of operations, cash flows, and fair values of assets and liabilities, including volatility in foreign currency exchange rates and interest rate movements.

Although we are headquartered in the U.S. our results of operations, including our foreign subsidiaries’ operations, are subject to foreign currency exchange rate fluctuations, primarily the U.S. dollar against the Euro, Pound Sterling, Swedish Krona, and Czech Koruna. This exchange exposure may have a material effect on our cash and cash equivalents, cash flows, and results of operations, particularly in cases of revenue generated under APAs that include provisions that impact our and our counterparty’s currency exchange exposure. To date, we have not entered into any foreign currency hedging contracts, although we may do so in the future.

We also face foreign currency exchange exposure that arises from translating the results of our global operations to the U.S. dollar at exchange rates that have fluctuated from the beginning of the period. While the financial results of our global activities are reported in U.S. dollars, the functional currency for our foreign subsidiaries is generally their respective local currency. Fluctuations in the foreign currency exchange rates of the countries in which we do business will affect our operating results, often in ways that are difficult to predict. A 10% decline in the foreign exchange rates (primarily against the U.S. dollar) relating to our foreign subsidiaries would result in a decline of stockholders’ equity (deficit) of approximately $52 million as of December 31, 2023.

The primary objective of our investment activities is preservation of capital, with the secondary objective of maximizing income.

Our exposure to interest rate risk is primarily confined to our investment portfolio. We do not believe that a change in the market rates of interest would have any significant impact on the realizable value of our investment portfolio. Changes in interest rates may affect the investment income we earn on our marketable securities when they mature and the proceeds are reinvested into new marketable securities and, therefore, could impact our cash flows and results of operations.

Interest and dividend income is recorded when earned and included in investment income. Premiums and discounts, if any, on marketable securities are amortized or accreted to maturity and included in investment income. The specific identification method is used in computing realized gains and losses on the sale of our securities.

Our convertible senior unsecured notes have a fixed interest rate and we have no additional material debt. As such, we do not believe that we are exposed to any material interest rate risk as a result of our borrowing activities.

The information required by this item is set forth on pages F-1 to F-45.

None.

The term “disclosure controls and procedures” (defined in SEC Rule 13a-15(e)) refers to the controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files under the Securities Exchange Act of 1934 (the “Exchange Act”) is recorded, processed, summarized, and reported, within time periods specified in the rules and forms of the Securities and Exchange Commission. “Disclosure controls and procedures” include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

The Company’s management, with the participation of the chief executive officer and the chief financial officer, has evaluated the effectiveness of the Company’s disclosure controls and procedures as of the end of the period covered by this Annual Report on Form 10-K (the “Evaluation Date”). Based on that evaluation, the Company’s chief executive officer and chief financial officer have concluded that, as of the Evaluation Date, such controls and procedures were effective at the reasonable assurance level.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is defined in Rules 13a-15(f) and 15d-15(f) promulgated under the Exchange Act, as a process designed by, or under the supervision of, the Company’s principal executive officer and principal financial officer and effected by the Company’s board of directors, management, and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. Such internal control includes those policies and procedures that:

•pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of the assets of the Company;

•provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company; and

•provide reasonable assurance regarding prevention or timely detection of an unauthorized acquisition, use, or disposition of the Company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2023. In making this assessment, our management used the criteria set forth in the 2013 Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on its assessment, our management has determined that, as of December 31, 2023, our internal controls over financial reporting are effective based on those criteria.

Ernst & Young LLP has issued a report on our internal control over financial reporting. This report is included in the Reports of Independent Registered Public Accounting Firm in Item 15(a)(1).

Our management, including our chief executive officer and chief financial officer, has evaluated any changes in our internal control over financial reporting that occurred during the year ended December 31, 2023 and has concluded that there was no change that occurred during the year ended December 31, 2023 that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

During our fiscal quarter ended December 31, 2023, one of our officers (as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) entered into a contract, instruction or written plan for the purchase or sale of our securities that is intended to satisfy the conditions specified in Rule 10b5-1(c) under the Exchange Act for an affirmative defense against liability for trading in securities on the basis of material nonpublic information. We refer to this contract, instruction, and written plan as a “Rule 10b5-1 trading plan.” We describe the material terms of this Rule 10b5-1 trading plan below.

On December 12, 2023, Filip Dubovsky, MD, our President, Research & Development, entered into a Rule 10b5-1 trading plan that is intended to satisfy the affirmative defense of Rule 10b5-1(c) and provides that Dr. Dubovsky, acting through a broker, may sell up to an aggregate of 13,365 shares of our common stock, subject to adjustments for stock splits, stock combinations, stock dividends and other similar changes to our common stock. Sales of shares under the plan may only occur from March 15, 2024 to June 14, 2024. The plan is scheduled to terminate on June 14, 2024, subject to earlier termination upon the sale of all shares subject to the plan or the expiration of all sale orders under the plan, upon termination by Dr. Dubovsky or the broker, or as otherwise provided in the plan.

The information required by this item is incorporated by reference from our definitive Proxy Statement for our 2024 Annual Meeting of Stockholders scheduled to be held in June 2024 (the “2024 Proxy Statement”). We expect to file the 2024 Proxy Statement within 120 days after the close of the fiscal year ended December 31, 2023.

We incorporate herein by reference the information required by this item concerning executive compensation to be contained in the 2024 Proxy Statement.

We incorporate herein by reference the information required by this item concerning security ownership of certain beneficial owners and management and related stockholder matters to be contained in the 2024 Proxy Statement.

The following table provides our equity compensation plan information as of December 31, 2023. Under these plans, our common stock may be issued upon the exercise or vesting of equity awards and purchases under our Employee Stock Purchase Plan (“ESPP”). See also the information regarding our equity awards and ESPP in Note 12 to the consolidated financial statements included herewith.

(1)Includes our 2015 Stock Incentive Plan, 2005 Stock Incentive Plan, and ESPP. The weighted-average exercise price in column (b) excludes restricted stock units, which are not subject to an exercise price.

(2)Includes our 2023 Inducement Plan only

We incorporate herein by reference the information required by this item concerning certain relationships and related transactions and director independence to be contained in the 2024 Proxy Statement.

We incorporate herein by reference the information required by this item concerning principal accountant fees and services to be contained in the 2024 Proxy Statement.

(a)The following documents are filed as part of the Annual Report on Form 10-K:

(1)Index to Financial Statements

(2)Financial Statement Schedules

Financial statement schedules are omitted because they are not applicable, not required under the instructions or all the information required is set forth in the financial statements or notes thereto.

(3)Exhibits

Exhibits marked with a single asterisk (*) are filed herewith.

Exhibits marked with a double plus sign (††) refer to management contracts, compensatory plans, or arrangements.

Confidential treatment has been granted for portions of exhibits marked with a double asterisk (**).

Confidential information contained in exhibits marked with a caret (^) has been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K.

All other exhibits listed have previously been filed with the SEC and are incorporated herein by reference.