NOVAVAX INC (NVAX)

Item 7.    MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

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 corporate growth strategy and key value drivers; our technology platform; our COVID-19 program (which currently includes our Nuvaxovid™ prototype COVID-19 vaccine ("NVX-CoV2373” or “prototype COVID-19 vaccine”), our Nuvaxovid™ COVID-19 vaccine for the 2023-2024 vaccination season (“XBB COVID-19 Vaccine”) and our Nuvaxovid™ updated COVID-19 vaccine for the 2024-2025 vaccination season (“NVX-CoV2705” or “updated COVID-19 vaccine”) collectively referred to as our (“COVID-19 Vaccine”)); 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, 2024; our global restructuring and cost reduction plan (“Restructuring Plan”), which includes a more focused investment in our COVID-19 vaccine; our cash flow forecast and project revenue, including potential royalties and milestones pursuant to our collaboration and license agreement (the “Sanofi CLA”) with Sanofi Pasteur Inc. (“Sanofi”); potential market sizes and demand for our products and product candidates; the efficacy, safety, and intended utilization of our products and 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 research and development investment strategy; the potential expansion of our pipeline beyond infections diseases into other therapeutic areas; 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 expectations with respect to the anticipated ongoing development and commercialization or licensure of the COVID-19 Vaccine; our expectations with respect to the anticipated ongoing development of COVID-19 variant strain-containing formulations, including the Phase 2b/3 Hummingbird™ trial, our CIC vaccine candidate and our stand-alone influenza vaccine candidate; our partnership efforts for our COVID-19-Influenza (“CIC”) vaccine candidate and stand-alone influenza vaccine candidate to advance towards a Biologics License Application (“BLA”) filing and commercialization; 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 under our advance purchase agreements ("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; plans regarding APA amendments; 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.

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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 and timely manufacture, market, distribute, or deliver our updated COVID-19 vaccine and the impact of our not having received a BLA from the U.S. Food and Drug Administration (U.S. FDA”) for the 2024-2025 vaccination season; challenges related to our partnership with Sanofi and in pursuing additional partnership opportunities; 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, or studies for our product candidates; challenges or delays in obtaining regulatory authorization for our product candidates, including for future COVID-19 variant strain changes, our CIC vaccine candidate, our stand-alone influenza vaccine candidate or other product candidates, including as a result of resource constraints at regulatory authorities including the U.S. FDA and the WHO; manufacturing, distribution or export delays or challenges; our substantial dependence on Serum Institute of India Pvt. Ltd. (“SII”) and Serum Life Sciences Limited (“SLS” and together with SII, “Serum”) for co-formulation and filling our COVID-19 vaccine and the impact of any delays or disruptions in their operations; difficulty obtaining scarce raw materials and supplies, including for our proprietary adjuvant; resource constraints, including human capital and manufacturing capacity, constraints on our ability to pursue planned regulatory pathways, alone or with partners; challenges in implementing the Restructuring Plan; our ability to timely deliver doses; challenges in obtaining commercial adoption and market acceptance of our COVID-19 vaccine, any COVID-19 variant strain-containing formulation, our CIC vaccine candidate, our stand-alone influenza vaccine candidate or our other product candidates; challenges meeting contractual requirements under agreements with multiple commercial, governmental, and other entities, including requirements to deliver doses that may require us 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; challenges related to the demand for vaccinations against COVID-19 or influenza; challenges in identifying and successfully pursuing innovation expansion opportunities; our expectations as to expenses and cash needs may prove not to be correct for reasons such as changes in plans or actual events being different than our assumptions; 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.

Overview

We are a company tackling global health challenges through scientific innovation that seeks to maximize our deep scientific expertise in vaccines and our cutting-edge technology platform. The differentiated platform features our recombinant protein-based nanoparticle technology and unique Matrix-M™ adjuvant. Our three strategic priorities are: focusing on our partnership with Sanofi announced in May 2024, leveraging our technology platform and pipeline to forge additional partnerships, and advancing our proven technology platform and early-stage pipeline. Our corporate growth strategy is supported by a lean and focused operating model.

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Our technology platform combined with our deep vaccine expertise, is the fuel for innovation and partnerships and we believe it has the potential to create significant value. Our proprietary Matrix-M™ adjuvant when added to vaccines, has been shown to help induce a stronger and longer-lasting immune response. Our recombinant protein-based nanoparticle technology has been shown to be highly immunogenetic. Together, we believe that our technology platform can induce potent, durable and broad immune responses, with the potential to be antigen-sparing. Our Matrix-M™ adjuvant can increase both antibody and cell-mediated immune responses to the vaccine and it has demonstrated a favorable tolerability profile in clinical trials. Our technology platform is used in our authorized COVID-19 vaccine and the R21/Matrix-M™ adjuvant malaria vaccine.

We have developed and manufactured our updated COVID-19 vaccine for the 2024-2025 vaccination season for use in individuals aged 12 and older. Our updated vaccine received Emergency Use Authorization (“EUA”) from the U.S. FDA in August 2024, along with several additional global regulatory authorizations for use in the 2024-2025 vaccination season. In the U.S., our BLA for our prototype COVID-19 vaccine and for our XBB COVID-19 vaccine is currently under U.S. FDA review with a Prescription Drug User Fee Act (“PDUFA”) date of April 2025.

In May 2024, we entered into a Collaboration and License Agreement with Sanofi, to co-commercialize our COVID-19 vaccine, including future updated versions that address seasonal COVID-19 variants. Under the terms of the agreement, we will continue to commercialize our updated COVID-19 vaccine through the end of the 2024-2025 vaccination season and beginning in 2025 and continuing during the term of the Sanofi CLA, we and Sanofi will commercialize the COVID-19 vaccine worldwide in accordance with a commercialization plan agreed by us and Sanofi, under which we will continue to supply certain of our existing APA customers and strategic partners, including Takeda Pharmaceutical Company Limited (“Takeda”) and SII. Upon completion of the existing APAs, we and Sanofi will jointly agree on commercialization activities of each party in each jurisdiction. Additionally, Sanofi has the right to develop novel influenza-COVID-19 combination vaccines utilizing our COVID-19 vaccine and Sanofi’s seasonal influenza vaccine, combination products containing our COVID-19 vaccine and one or more non-influenza vaccines, and multiple new vaccines utilizing our Matrix-M™ adjuvant.

In December 2024, Sanofi announced that the U.S. FDA granted Fast Track designation to two Sanofi combination vaccine candidates: the first combination consists of Fluzone High-Dose combined with our COVID-19 vaccine, and the second combination consists of Flublok with our COVID-19 vaccine. Sanofi is evaluating the safety and immunogenicity of both combination vaccine candidates in two separate Phase 1/2 trials.

We are eligible to receive royalties and milestones associated with the ongoing sales of our COVID-19 vaccine and Sanofi’s influenza-COVID-19 combination vaccines and any other combination vaccines Sanofi may develop, as well as ongoing product royalties for vaccines developed with our Matrix-M™ adjuvant. We discuss this agreement in further detail in Note 4 to our accompanying consolidated financial statements.

Additionally, we are advancing our pipeline of both late- and early-stage programs with a focus on potentially high-value assets in areas with unmet medical need, compelling scientific rationale and strong commercial opportunity.

Our late-stage programs include a CIC vaccine candidate, as well as a stand-alone influenza vaccine candidate. In December 2024, we initiated the initial cohort of a Phase 3 trial comparing our CIC vaccine and stand-alone influenza vaccine to our updated COVID-19 vaccine and a licensed seasonal influenza vaccine comparator in adults aged 65 and older. We intend to partner these vaccine candidates in order to advance to BLA filing and commercialization.

Furthermore, we provide our Matrix-M™ adjuvant for use in collaborations. These include the R21/Matrix-M™ adjuvant malaria vaccine, a malaria vaccine developed by our partner, the Jenner Institute, University of Oxford (“R21/Matrix-M™ adjuvant malaria vaccine”) and manufactured by SII. R21/Matrix-M™ adjuvant malaria vaccine is authorized in several countries. Additionally, we provide Matrix-M™ adjuvant for use in various programs in preclinical and clinical stage, as well as preclinical investigations. Examples include, an agreement with the Gates Foundation, and in a related master transfer agreement with a leading pharmaceutical company for exploration of Matrix-M™ adjuvant used as a potential advancement in their pipeline.

We continue to advance our strategic assessment of our emerging, early-stage pipeline. We intend to develop our early-stage pipeline using a disciplined and capital-efficient approach. Our R&D investment strategy seeks to place smart, lower-cost investments on the programs with the highest potential value, both within infectious disease and beyond, with the

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intent of partnering these assets at proof of concept and shifting late-stage development costs to our partners to finalize clinical development. We are pursuing early-stage research in diseases such as, respiratory syncytial virus (“RSV”) combinations, varicella-zoster virus (shingles) and Clostridioides difficile (C. Diff.) colitis. We are actively working to evaluate several RSV combination candidates to progress forward toward an Investigational New Drug (“IND”). We are actively developing an H5N1 avian pandemic influenza vaccine candidate and the toxicology study is underway. We are actively monitoring the emerging public health situation and are pursuing funding opportunities to join preparedness options. Additionally, we are evaluating potential expansion beyond infectious diseases including therapeutic areas such as oncology, where we believe our technology could augment and improve upon current therapies.

Business Highlights

Fourth Quarter 2024 and Recent Highlights

Strategic Priority #1: Sanofi Partnership

•Transitioned lead commercial responsibility of Nuvaxovid™ COVID-19 vaccine beginning with the 2025-2026 vaccination season for the U.S. and other select major markets.

•Achieved $50 million milestone associated with the first pediatric database lock in the fourth quarter of 2024.

•Prescription Drug User Fee Act target action date of April 2025 for our COVID-19 vaccine BLA.

◦Achievement of BLA approval triggers a $175 million milestone payment from Sanofi.

•Marketing authorization transfers to Sanofi for U.S. and European Union markets are expected in late 2025.

◦Achievement triggers an additional $50 million in combined milestone payments from Sanofi.

•Sanofi announced it received U.S. FDA Fast Track designation for two combination vaccine candidates progressing to Phase 1/2 clinical trials, combining Novavax’s proven COVID-19 vaccine with Sanofi’s market-leading influenza vaccines.

◦Potential for future $350 million development and launch milestone payments associated with Sanofi influenza-COVID-19 combination products.

Strategic Priority #2: Leverage our technology platform and pipeline to forge additional partnerships

•In December 2024, initiated an initial cohort of 2,000 participants for the Phase 3 trial for our CIC and stand-alone seasonal influenza vaccine candidates to evaluate immunogenicity and safety in adults aged 65 and older.

◦Initial cohort data expected by mid-2025.

◦Intend to partner both vaccine programs to advance all future clinical development, regulatory filing and commercialization activities.

•R21/Matrix-M™ adjuvant malaria vaccine launched in additional countries in Africa by SII.

Strategic Priority #3: Advance our technology platform and early-stage pipeline

•Continued preclinical development of H5N1 avian pandemic influenza program evaluating multiple highly pathogenic avian influenza strains.

•Continued advancement of early-stage preclinical research for RSV combinations, varicella-zoster virus (shingles) and C. Diff. colitis vaccine candidates.

•Initiated exploratory preclinical work in areas outside of infectious disease, such as oncology.

•Advancing artificial intelligence capabilities to significantly accelerate predictive modeling, optimize discovery and enhance the precision of vaccine design.

•Initiated work on new potential Matrix formulations intended to enable different regimens and dosing schedules, improve vaccines and enable targeted approaches and advancements in therapeutic areas beyond infectious diseases.

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Financing Transactions

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, 2024, we sold 12.2 million shares of our common stock under our August 2023 Sales Agreement, resulting in net proceeds of approximately $188 million. As of December 31, 2024, the remaining balance available under the August 2023 Sales Agreement was approximately $51 million.

In May 2024, we also entered into a securities subscription agreement (the "Sanofi Subscription Agreement") with Sanofi, pursuant to which we sold and issued to Sanofi, in a private placement, 6.9 million shares of our common stock, at a price of $10.00 per share, for aggregate gross proceeds to us of $68.8 million.

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.

In August 2023, we also entered into a Securities Subscription Agreement (the "SK Subscription Agreement") with SK bioscience Co., Ltd. ("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 at a price of $13.00 per share (the “SK Shares”) for aggregate gross proceeds to us of approximately $84.5 million. The closing of the Private Placement occurred on August 10, 2023.

Critical Accounting Policies and Use of Estimates

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, licensing and transition services revenue, 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.

Revenue Recognition, Product Sales - Advance Purchase Agreements (“APAs”)

Product sales include sales associated with COVID-19 Vaccine supply agreements, sometimes referred to as 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 (“ASC 606”), 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

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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.

Revenue Recognition, Product Sales - U.S. Commercial

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.

Gross-to-net deductions include the following:

•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 wholesale distributors and indirect customers the right to return expired doses. 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, 2024, we recognized gross-to-net deductions against U.S. commercial product sales of $120.3 million for product returns and $105.8 million for wholesale distributor fees, discounts and chargebacks. As of December 31, 2024, $77.1 million and $10.1 million related to product returns, wholesale distributor fees, discounts, and chargebacks were included in Accrued expenses and Accounts payable, respectively, and $50.6 million was included in and reduced Accounts receivable on our consolidated balance sheet. 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 Accrued expenses and $2.6 million was included in and reduced Accounts receivable on our consolidated balance sheet.

Revenue Recognition, Licensing, Royalties, and Other - Licensing and Transition Services

The terms of licensing agreements may contain multiple performance obligations, which may include licenses and transition services. We evaluate licensing agreements under ASC 606, to determine the distinct performance obligations. Prior to recognizing revenue, we estimate the transaction price, including variable consideration that is subject to a constraint. Variable consideration is included in the transaction price to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur and when the uncertainty associated with the variable consideration is subsequently resolved. Total consideration may include nonrefundable upfront license fees, transition service fees, other

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payments based upon the achievement of specified milestones, and royalty payments based on product sales from licensed products.

For multiple performance obligation arrangements, we allocate the transaction price to each distinct performance obligation based on its relative stand-alone selling price. The stand-alone selling price is generally determined for each performance obligation based on the prices charged to customers, discounted cash flows, or using expected cost-plus margin. For stand-alone selling prices determined using discounted cash flows, we consider discounted, probability-weighted cash flows related to the performance obligation transferred. In developing such estimates, we apply judgment in determining the forecasted revenue, expected margins, and the discount rate. These estimates are subjective and require us to make assumptions about future cash flows. Revenue related to performance obligations satisfied at a point in time is recognized when the customer obtains control of the promised asset. For performance obligations recognized over time, we recognize revenue using an input method to measure progress by utilizing costs incurred to-date relative to total expected costs. Under this process, we consider the costs that have been incurred to-date, as well as projections to completion using various inputs and assumptions, including, but not limited to, progress towards completion, labor costs and level of effort, material and subcontractor costs, indirect administrative costs, and other identified risks. Estimating the total cost at completion of our performance obligation under a contract is subjective and requires us to make assumptions about future activity and cost drivers. Changes in these estimates can occur for a variety of reasons and may impact the timing of revenue recognition on our contracts. Changes in estimates related to the process are recognized in the period when such changes are made on a cumulative catch-up basis. We have not experienced any material adjustments as a result of changes in estimates arising from this process.

Inventory Realizability

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. For the year ended December 31, 2024, we recorded inventory write-downs of $21.0 million and losses on firm purchase commitments of inventory of $7.4 million. In addition, for the year ended December 31, 2024, we recorded recoveries on firm purchase commitments of $0.7 million related primarily to negotiated reductions to previously recognized firm purchase commitments. 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.

Accounting for Research and Development Expenses

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 contract manufacturing organizations (“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

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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.

Recent Accounting Pronouncements

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

Results of Operations for Fiscal Years 2024 and 2023

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, 2023, compared to the year ended December 31, 2022, 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, 2023.

Revenue

Revenue for the year ended December 31, 2024 was $682.2 million as compared to $983.7 million for the year ended December 31, 2023, a decrease of $301.5 million. Revenue for the year ended December 31, 2024, was primarily comprised of revenue from licensing and product sales of COVID-19 Vaccine. Revenue for the year ended December 31, 2023, was primarily comprised of revenue from product sales of COVID-19 Vaccine and services performed under our USG Agreement. The decrease in revenue is due to a decrease in revenue under the USG Agreement and in the quantity of dose sales of COVID-19 Vaccine, partially offset by licensing, royalties, and other revenue from the Sanofi CLA.

Product sales

Product sales for 2024 were $190.2 million as compared to $531.4 million for 2023, a decrease of $341.2 million. The decrease in product sales is primarily due to a decreased quantity of dose sales of COVID-19 Vaccine under our APA agreements during the year ended December 31, 2024 as compared to 2023. The geographic distribution of product sales was as follows:

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Licensing, royalties, and other

Licensing, royalties, and other revenues for 2024 were $492.0 million as compared to $25.0 million for 2023, an increase of $467.0 million. The increase was primarily due to revenue from the Sanofi CLA.

Grants

We did not have any Grants revenue during the year ended December 31, 2024, as compared to $427.3 million during the year ended December 31, 2023, a decrease of $427.3 million. Grant revenue for the year ended December 31, 2023 was comprised of revenue for services performed under our USG Agreement. As of December 31, 2023, we had recognized the full contract funding under the USG Agreement in revenue.

Expenses:

Cost of Sales

Cost of sales decreased to $202.7 million for 2024 as compared to $343.8 million for 2023, a decrease of $141.0 million. The decrease was primarily due to a decrease in the quantity of dose sales of COVID-19 Vaccine and a decrease in excess, obsolete, or expired inventory and losses on certain firm purchase commitments. Cost of sales for 2024 included expense of $28.4 million related to excess, obsolete, or expired inventory and losses on certain firm purchase commitments, $3.8 million ROU asset impairment charges for CMO manufacturing capacity of excess quantities, $44.9 million related to unutilized manufacturing capacity, and a credit of $0.7 million related to negotiated reductions to certain previously recognized firm purchase commitments. Cost of sales for 2023 included expense of $145.9 million related to excess, obsolete, or expired inventory and losses on 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. The cost of sales as a percentage of product sales may fluctuate in the future as a result of changes to our customer mix, quantity of dose sales, or standard costs.

Research and Development Expenses

Research and development expenses decreased to $391.2 million for 2024 as compared to $737.5 million for 2023, a decrease of $346.3 million. The decrease was primarily due to a reduction in overall expenditures relating to development

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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, 2024 and 2023 decreased to $122.4 million from $413.4 million primarily as a result of a reduction in coronavirus vaccines clinical and support costs. The decrease was also the 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 embedded lease costs, under 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 2025, we expect research and development expenses to decrease as compared to 2024 as we continue to right-size our operating expenses as part of our cost reduction initiative.

Selling, General, and Administrative Expenses

Selling, general, and administrative expenses decreased to $337.2 million for 2024 from $468.9 million for 2023, a decrease of $131.8 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 advertising and promotion costs in support of our COVID-19 commercial program, employee expenses, and professional fees, partially offset by restructuring expenses.

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Other Income (Expense), Net:

We had total net other income of $72.3 million for 2024 compared to total net other income of $23.5 million for 2023, an increase of $48.8 million. The increase in other income (expense), net is primarily due to the gain on the disposition of Novavax CZ assets, the favorable impact in 2024 as compared to 2023, of exchange rates on foreign currency denominated balances, including an intercompany loan with Novavax CZ, and additional interest income on Cash and cash equivalents and Marketable securities balances, partially offset by additional interest expense.

Income Tax Expense:

During the years ended December 31, 2024 and 2023, we recognized $10.9 million and $2.0 million of income tax expense, respectively, related to federal, state, and foreign income taxes.

Net Loss:

Net loss for 2024 was $187.5 million, or $1.23 per share, as compared to $545.1 million, or $5.41 per share, for 2023, a decrease of $357.6 million, or $4.18 per share. The decrease in net loss during the years ended December 31, 2024, was primarily due to a decrease in total expenses, partially offset by a decrease in total revenue.

The increase in weighted average shares outstanding for 2024 is primarily a result of sales of our common stock.

Liquidity Matters and Capital Resources

Our future capital requirements depend on numerous factors including, but not limited to, revenue from our product sales, milestone payments, royalties and reimbursements under licensing arrangements with our strategic partners; our projected activities related to the development and commercial support of our COVID-19 Vaccine and our CIC and stand-alone influenza vaccine candidates, 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 vaccine and stand-alone influenza vaccine candidates, which are in various stages of development. Our ability to generate revenue from product sales is subject to uncertainty specifically as it relates to our ability to successfully develop, manufacture, distribute, and market our updated vaccine and to successfully execute on our APAs, as discussed below. Additionally, our plans include our ongoing restructuring and cost reduction measures (see Note 18 to our accompanying consolidated financial statements), and may also include raising additional capital through a combination of additional equity and debt financing, 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. 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.

In May 2024, we entered into the Sanofi CLA pursuant to which Sanofi received:

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i) A co-exclusive license to commercialize our current stand-alone COVID-19 Vaccine, including our prototype vaccine and updated vaccines, that address seasonal variants throughout the world (the “COVID-19 Vaccine Products”);

ii) A sole license to develop and commercialize combination products containing a potential combination of our COVID-19 Vaccine and Sanofi’s seasonal influenza vaccine (“COVID-19 and influenza Combination Products” or “CIC Products”);

iii) A non-exclusive license to develop and commercialize combination products containing both our COVID-19 Vaccine and one or more non-influenza vaccines (“Other Combination Products” and together with the COVID-19 Vaccine Products, CIC Products, and Other Combination Products, “Licensed COVID-19 Products”) and

iv) A non-exclusive license to develop and commercialize other vaccine products selected by Sanofi that include our Matrix-M™ adjuvant.

Under the Sanofi CLA, we received a non-refundable upfront payment of $500 million. We also achieved a $50.0 million milestone, which is included in Accounts receivable on the Consolidated balance sheet as of December 31, 2024. We are eligible to receive development, technology transfer, launch, and sales milestone payments totaling up to an additional $650.0 million in the aggregate with respect to the Licensed COVID-19 Products and royalty payments on Sanofi’s sales of such licensed products. In addition, we are also eligible to receive development, launch, and sales milestone payments of up to $200 million for each of the first four Adjuvant Products and $210 million for each Adjuvant Product thereafter, and royalty payments on Sanofi’s sales of all such licensed products.

Commencing shortly after the effective date of the Sanofi CLA, we commenced activities related to the technology transfer of our manufacturing process for the COVID-19 Vaccine Products and Matrix-M™ components to Sanofi. Until the successful completion of such transfer, we will supply Sanofi with both COVID-19 Vaccine Products and Matrix-M™ intermediary components for Sanofi’s use and are eligible for reimbursement of such costs from Sanofi. Additionally, Sanofi will reimburse us for our research and development and medical affairs costs related to the COVID-19 Vaccine Products in accordance with agreed upon plans and budgets.

Under the Sanofi CLA, we will continue to commercialize the updated vaccine through the end of the 2024-2025 vaccination season. Beginning in 2025 and continuing during the term of the Sanofi CLA, we and Sanofi will commercialize the COVID-19 Vaccine Products worldwide in accordance with a commercialization plan agreed by us and Sanofi, under which we will continue to supply our existing APA customers and strategic partners, including Takeda and SII. Upon completion of the existing APAs, we and Sanofi will jointly agree on commercialization activities of each party in each jurisdiction.

In May 2024, we also entered into the Sanofi Subscription Agreement, pursuant to which we sold and issued to Sanofi, in a private placement, 6.9 million shares of our common stock at a price of $10.00 per share for aggregate gross proceeds to us of $68.8 million.

We have also entered into supply agreements, sometimes referred to as APAs, with various countries globally. As of December 31, 2024, 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 $1.3 billion, of which $1.1 billion is included in Deferred revenue on our consolidated balance sheet. Failure to timely meet regulatory milestones, obtain timely supportive recommendations from governmental advisory committees, 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 or result in the reversal of previously recognized revenue. In the first quarter of 2025, we received written notice of a $23 million claim related to certain performance obligations under an APA agreement with a customer. We believe we have fulfilled the requirements related to this matter and are evaluating the merits of the claim. The timing to fulfill performance obligations related to APAs 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 under certain of our APAs. 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, 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. Additionally, for the remaining APA agreements, our intent is to deliver doses or when appropriate, amicably negotiate and exit

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agreements. The timing to fulfill performance obligations related to the Sanofi CLA will depend on the timing of costs incurred relative to total expected costs.

In August 2024, our updated COVID-19 vaccine received EUA from the U.S. FDA for active immunization to prevent COVID-19 in individuals aged 12 and older. 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, 2024, gross-to-net deduction balances were $116.7 million related to product returns and $21.1 million related to wholesale distributor fees, discounts, and chargebacks. As of December 31, 2024, $77.1 million of gross-to-net deductions were included in Accrued expenses, $10.1 million were included Accounts payable, and $50.6 million were included in and reduced Accounts receivable on the consolidated balance sheet.

Pursuant to the Settlement Agreement with Fujifilm (see Note 4 to our accompanying consolidated financial statements), in March 2024, we paid $42.0 million to Fujifilm, the parties agreed to a mutual release of claims arising from, under or otherwise in connection with the prior confidential settlement agreement and release effective September 30, 2022, and Fujifilm agreed to dismiss its demand for arbitration with the Judicial Arbitration and Mediation Services (“JAMS”). This payment is less than amounts previously recognized as embedded lease expense and reflected in Research and development expenses from Fujifilm manufacturing activity and accordingly, during the year ended December 31, 2024, we recorded a benefit of $26.6 million as Research and development expenses.

We have an APA with the Commonwealth of Australia (“Australia”) for the purchase of doses of COVID-19 Vaccine (the “Australia APA”). In December 2024, we entered into an amendment to the Australia APA with Australia. Pursuant to the amendment, we acknowledged the cancellation by Australia of the delivery of certain doses of our COVID-19 Vaccine scheduled for delivery between the fourth quarter of 2023 and the fourth quarter of 2025 and we agreed to credit approximately $31 million of the advanced payment paid by Australia to us against outstanding invoices and invoices for the future delivery of approximately 3 million doses of COVID-19 Vaccine without requiring additional cash payments. We also agreed to an updated delivery schedule providing for the potential delivery of COVID-19 Vaccine or future variant COVID-19 Vaccine through the end of 2029. The amendment further provides for certain remedies for Australia, including return of unused credit, cancellation of doses, or termination of the Australia APA, in the event we miss or under deliver doses to Australia or fail to receive regulatory approval of a variant COVID-19 vaccine. The amendment also provides Australia with the right to cancel doses if we fail to timely notify Australia of changes to our commercialization plans. As of December 31, 2024, $15.6 million was classified as current Deferred revenue and $118.2 million was classified as non-current Deferred revenue with respect to the Australia APA in our consolidated balance sheet, which will be recognized in product revenue as doses are delivered to Australia.

We have an APA with the Pharmaceutical Management Agency (“Pharmac”), a New Zealand Crown entity, for the purchase of doses of COVID-19 Vaccine (the “New Zealand APA”). In July 2024, Pharmac provided notice of its termination of the New Zealand APA. Pharmac has requested a refund of certain advanced payments, and we are in discussion with Pharmac regarding whether a refund of the advanced payments is appropriate under the New Zealand APA. As of December 31, 2024, $31.3 million was classified as Other current liabilities with respect to the New Zealand APA in our consolidated balance sheet. Approximately $125 million of the contract value related to future deliverables may no longer be available if the New Zealand APA is terminated. We responded to Pharmac in September 2024 indicating we do not believe Pharmac has the right to unilaterally terminate the contract or receive a refund of any part of the remaining upfront payment. We are in ongoing discussions with Pharmac to resolve this matter, which may not be achievable on acceptable terms or at all.

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”). The Canadian government may terminate the Canada APA, as amended, as we failed to receive regulatory approval for our COVID-19 Vaccine using bulk antigen produced at Biologics Manufacturing Centre Inc. (“BMC”) on or before December 31, 2024. Therefore, we are in discussions with Canada regarding a potential amendment to the Canada APA to address possible alternatives, which may not be achievable on acceptable terms or at all. As of December 31, 2024, $555.7 million was classified as current Deferred revenue with respect to the Canada APA in our consolidated balance sheet. If the Canadian government terminates the Canada APA, $28.0 million of advanced payments previously received would become refundable, which was classified as Other current liabilities in our consolidated balance sheet, and approximately $224 million of the contract value related to future deliverables would no longer be available.

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In November 2024, we and 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”) entered into a Termination and Settlement Agreement (the “Settlement Agreement”) and a Letter of Amendment to the Settlement Agreement (the “Settlement Agreement Amendment”), relating to the Amended and Restated SARS-CoV-2 Vaccine Supply Agreement (the “Amended and Restated UK Supply Agreement”) and the SARS-CoV-2 Vaccine Supply Agreement, dated October 22, 2020 (the “Original UK Supply Agreement”). The Settlement Agreement resolved the disputes regarding the Amended and Restated Supply Agreement and released both parties of all claims arising out of or connected with the Amended and Restated Supply Agreement.

Under the terms of the Settlement Agreement and Settlement Agreement Amendment, we and the Authority agreed to terminate the Amended and Restated Supply Agreement and to fully settle the outstanding amount under dispute related to upfront payments of $112.5 million previously received by us from the Authority under the Amended and Restated Supply Agreement. Pursuant to the Settlement Agreement, we agreed to pay a refund of $123.8 million (the “Settlement Payment”) to the Authority in equal quarterly installments of $10.3 million over a three year period, ending in June 2027. The Settlement Payment amount includes an $11.3 million provision for interest over the period and may be avoided if we choose to accelerate payments. As of December 31, 2024, the remaining upfront payment previously received from the authority is classified as $36.4 million of other current liabilities and $58.8 million of Other non-current liabilities on our consolidated balance sheet.

We entered into an APA with the Vaccine Alliance (“Gavi”) in May 2021 (the “Gavi APA”), pursuant to which we received upfront payments of $700 million from Gavi (the “Advance Payment Amount”) to be applied against purchases of our prototype vaccine by certain countries participating in the COVAX Facility. As of December 31, 2023, the remaining Gavi Advance Payment Amount was $696.4 million. In February 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 in February 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 second 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 in 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, pursuant to the Gavi Settlement Agreement, we granted Gavi an additional credit of up to $225 million that may be applied against qualifying sales of any of our vaccines for supply to such low-income and lower-middle income countries that exceed the $80 million deferred payment amount in any calendar year during the deferred payment term. In total, the Gavi settlement agreement is comprised of $700 million of potential consideration, consisting of the $75 million initial settlement payment, deferred payments of up to $400 million that may be reduced through annual vaccine credits, and the additional credit of up to $225 million that may be applied for certain qualifying sales.

We recorded the $3.6 million difference between the refund liability recorded as of December 31, 2023 of $696.4 million and the $700 million of total consideration under the arrangement as a revenue adjustment during the year ended December 31, 2024. As of December 31, 2024, the remaining amounts included on our consolidated balance sheet are classified as $225.0 million in non-current Deferred revenue for the additional credit that may be applied against future qualifying sales, $85.0 million in Other current liabilities, and $275.0 million in other non-current liabilities. In addition, we and Gavi entered into a security agreement pursuant to which we granted Gavi a security interest in accounts receivable from SII under the SII R21 Agreement (see Note 3 to our accompanying consolidated financial statements), 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.

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 depended exclusively on Serum for co-formulation and filling and finishing. For the 2024-2025 vaccination season, we expanded our supply chain network and introduced new single-dose vial and pre-filled syringe product presentations in certain markets. In May 2024, we and SLS entered into a supply agreement (the “SLS Supply Agreement”) under which SLS will supply us antigen drug substance and finished COVID-19 Vaccine doses. The SLS Supply Agreement includes the general terms and conditions of supply orders between us and SLS. We and SLS

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execute firm purchase orders to include specific quantities to be delivered under the SLS Supply Agreement. Pursuant to the SLS Supply Agreement, SLS or its authorized manufacturer is responsible for obtaining and maintaining all necessary permits or other regulatory approvals to manufacture drug substance and drug product. Unless otherwise earlier terminated, the SLS Supply Agreement will expire on the later of June 30, 2028 or two years after the expiration or termination of the last firm purchase order under the SLS Supply Agreement. Either party may terminate the SLS Supply Agreement if the other party commits a material breach of the SLS Supply Agreement that is not timely cured or is not curable. The SLS Supply Agreement contains certain customary representations and warranties of the parties along with certain customary covenants, including confidentiality and indemnity provisions. Any delays or disruptions in these suppliers’ operations could prevent or delay the delivery of customer orders.

As of December 31, 2024, we had $545.3 million in cash and cash equivalents and restricted cash and $392.9 million in marketable securities as compared to $583.8 million in cash and cash equivalents and restricted cash as of December 31, 2023.

We funded our operations in 2024 primarily with cash and cash equivalents, marketable securities, non-refundable upfront payment under the Sanofi CLA and Sanofi Subscription Agreement, proceeds from the sale of securities under our August 2023 Sales Agreement, upfront payments under APAs, and revenue from product sales. 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 milestone payments, royalties, transition services and technology transfer under the Sanofi CLA, revenue and/or royalties from product sales, our cash and cash equivalents and investments in marketable securities, and other potential funding sources including equity financings, which may include at the market offerings, debt financings, collaborations, strategic alliances, asset sales, and marketing, distribution or licensing arrangements.

The following table summarizes cash flows for 2024 and 2023:

Net cash used in operating activities was $87.3 million for 2024, as compared to cash used in operating activities of $714.0 million in 2023. The decrease in cash used in operating activities is primarily due to the non-refundable upfront payment under the Sanofi CLA and an overall decrease in operating expenses period-over-period, partially offset by the timing of payments to vendors.

Net cash used in investing activities was $204.0 million for 2024, as compared to $58.8 million in 2023. The increase in cash used in investing activities is primarily due to our investment in marketable securities, partially offset by proceeds on the disposition of Novavax CZ assets of 192.6 million and lower expenditures on equipment and leasehold improvements. Capital expenditures for the years ended December 31, 2024 and 2023 were $13.1 million and $53.8 million, respectively.

Net cash provided by financing activities was $260.6 million for 2024, as compared to $4.5 million in 2023. The increase in cash provided by financing activities is primarily as a result of the 2023 repayment of $325.0 million of our 3.75% Convertible notes in 2023, partially offset by lower proceeds from the sale of shares under our August 2023 Sales Agreement and Sanofi Subscription Agreement, totaling $263.3 million in 2024, as compared with proceeds from the sale of shares under our June 2021 Sales Agreement and August 2023 Sales Agreement and the sale of SK Shares, totaling $360.2 million in 2023.

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Going Concern

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. At December 31, 2024, we had $530.2 million in cash and cash equivalents, $392.9 million in marketable securities, and had negative working capital of $25.5 million. During 2024, we incurred a net loss of $187.5 million and had net cash flows used in operating activities of $87.3 million.

In accordance with Accounting Standards Codification (“ASC”) Topic 205-40, Presentation of Financial Statements - Going Concern, we evaluated our ability to continue as a going concern within one year after the date that the accompanying consolidated financial statements are issued. Based on our current cash, cash equivalents and marketable securities balances and our current cash flow forecast for the one-year going concern look forward period, we concluded that we expect to have sufficient capital available to fund our operations for the one-year period from the date that these financial statements are issued. As of December 31, 2023, we had concluded that there was substantial doubt about our ability to continue as a going concern primarily due to significant uncertainty related to our ability to successfully develop, manufacture, distribute, and market our COVID-19 Vaccine and execute on certain cost-reduction initiatives. The Sanofi CLA, combined with proceeds from the disposition of assets held by Novavax CZ, cost reductions and the settlement of certain liabilities, alleviated the substantial doubt.

Contractual Obligations

The following table summarizes our contractual obligations as of December 31, 2024 (in thousands):

(1)    In 2022, we issued $175.3 million of 5.00% convertible senior unsecured notes due in 2027.

(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, 2024, 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.

Item 7.    MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

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

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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.

Overview

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

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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.

Business Highlights

Fourth Quarter 2023 and Recent Highlights

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

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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

Financing Transactions

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).

Critical Accounting Policies and Use of Estimates

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.

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Revenue Recognition, Product Sales - Advance Purchase Agreements

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.

Revenue Recognition, Product Sales - U.S. Commercial

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.

Gross-to-net deductions include the following:

•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,

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and chargebacks were included in Other current liabilities and $2.6 million was included in Accounts receivable on our consolidated balance sheet.

Pre-Launch Inventory

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.

Inventory Realizability

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.

Accounting for Research and Development Expenses

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.

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Recent Accounting Pronouncements

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

Results of Operations for Fiscal Years 2023 and 2022

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

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

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:

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Grants

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

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.

Expenses:

Cost of 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

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

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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.

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Selling, General, and Administrative Expenses

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.

Other Expense, Net:

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.

Income Tax Expense:

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:

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.

Liquidity Matters and Capital Resources

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

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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-

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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

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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.

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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.

Going Concern

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

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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.

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Contractual Obligations

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.

Item 7.    MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

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, 2022; 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 NVX-CoV2373 by us and our partners; our estimate of the number of individuals who may potentially be reached by NVX-CoV2373; our expectations with respect to the anticipated ongoing development and commercialization or licensure of NVX-CoV2373, ongoing development of COVID-19 variant strain-containing monovalent or bivalent formulation, efforts to expand the NVX-CoV2373 label worldwide as a booster, and to various age groups and geographic locations, and our seasonal quadrivalent influenza vaccine, previously known as NanoFlu; 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, 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, challenges satisfying, alone or together with partners, various safety, efficacy, and product characterization requirements, including those related to process qualification and assay validation, necessary to satisfy applicable regulatory authorities, such as the FDA, the WHO, United Kingdom (“UK”) Medicines and Healthcare Products Regulatory Agency, the European Medicines Agency, the Republic of Korea’s Ministry of Food and Drug Safety, or Japan’s Ministry of Health, Labour and Welfare; unanticipated challenges or delays in conducting clinical trials; difficulty obtaining scarce raw materials and supplies; resource constraints, including human capital and manufacturing

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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 meeting contractual requirements under agreements with multiple commercial, governmental, and other entities; 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 NVX-CoV2373 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.

Overview

We are a biotechnology company that promotes improved health globally 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 genetically engineered nanostructures of conformationally correct recombinant proteins that mimic those found on natural pathogens. This technology enables the immune system to recognize the right target proteins from different angles and develop protective antibodies. 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 and stimulate higher levels of functional antibodies and induce a cellular immune response.

We have developed a COVID-19 vaccine NVX-CoV2373 (“Nuvaxovid™,” “Covovax™,” “Novavax COVID-19 Vaccine, Adjuvanted”) and are developing an influenza vaccine candidate, a COVID-19-Influenza Combination (“CIC”) vaccine candidate, and additional vaccine candidates, including a COVID-19 variant strain-containing monovalent or bivalent formulation. NVX-CoV2373 has received approval, interim authorization, provisional approval, conditional marketing authorization (“CMA”), and emergency use authorization (“EUA”) from multiple regulatory authorities globally for both adult and adolescent populations as a primary series and for both homologous and heterologous booster indications. In addition to COVID-19 and seasonal influenza, our other areas of focus include respiratory syncytial virus (“RSV”) and malaria.

Business Highlights

Fourth Quarter 2022 and Recent Highlights

COVID-19 Vaccine Orders and Plans for the 2023 Fall Vaccination Season

•Delivered over 100 million doses of Nuvaxovid, Novavax’s COVID-19 vaccine, globally to date

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•Modified agreement with the U.S. government for up to 1.5 million additional doses of Novavax’s COVID-19 vaccine for delivery in 2023

◦Agreement maintains the U.S. public’s access to Novavax’s COVID-19 vaccine and supports the development of smaller dose vials, strain selection in line with U.S. Food and Drug Administration (FDA) recommendations and a smooth transition to the commercial market

•Reaffirmed intent to deliver an updated mono- or bivalent strain vaccine for the 2023 fall vaccination season, consistent with public health recommendations

•Secured European Medicines Agency (EMA) and FDA approval of Nuvaxovid five-dose vial variation and EMA approval of the Company’s Czech Republic facility to manufacture antigen and supply Nuvaxovid to the E.U.

COVID-19 Vaccine Clinical Development Program and Expanded Authorizations

•Presented data to the U.S. FDA Vaccine and Related Biological Products Advisory Committee demonstrating that when used as a booster, Novavax’s COVID-19 vaccine induces broad functional immune responses, including for contemporary variants

•Announced topline results from Phase 3 COVID-19 Omicron BA.1 vaccine candidate, achieving the primary strain-change endpoint

◦Part 2 to evaluate our prototype vaccine compared to an Omicron BA.5 vaccine, as well as a bivalent containing prototype and Omicron BA.5 vaccine

•Expanded Nuvaxovid label in adult booster and adolescent primary series to enable broader uptake in the long-term commercial market

COVID-19-Influenza Combination (CIC) Vaccine Candidate Clinical Development

•Initiated Phase 2 dose-confirming trial to evaluate safety and immunogenicity of different formulations of CIC and influenza stand-alone vaccine candidates in adults aged 50 to 80 years, with topline results expected by mid-year 2023

•CIC Phase 2 trial includes additional study arms exploring alternate influenza stand-alone formulations

Financing Transactions

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 of $69.8 million. Concurrently with this public offering, we issued $175.3 million aggregate principal amount of 5.00% convertible senior unsecured notes due 2027 (the “2027 Notes”), including $25.3 million that was issued upon the exercise of the full option to purchase additional notes in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended. The 2027 Notes will mature on December 15, 2027, unless earlier converted, redeemed, or repurchased. We received $166.4 million in net proceeds from the issuance of the 2027 Notes after deducting the initial purchasers’ fees and our offering expenses. See Note 11 to our consolidated financial statements in Part II, Item 8, “Financial Statements and Supplementary Data,” of this Annual Report on Form 10-K for additional information related to the 2027 Notes.

In June 2021, we entered into an At Market Issuance Sales Agreement (the “June 2021 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. As of December 31, 2022, the remaining balance under the June 2021 Sales Agreement was approximately $318 million. During the years ended December 31, 2022 and 2021, we sold 2.2 million and 2.6 million, respectively, of shares of our common stock resulting in net proceeds of approximately $179 million and $565 million, respectively, under our various At Market Issuance Sales Agreements.

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Critical Accounting Policies and Use of Estimates

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 grant revenue, lease accounting, pre-launch inventory, inventory valuation, 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.

Grant Revenue Recognition

Our grant revenue primarily consists of funding under U.S. government contracts including the USG Agreement and the DoD Contract and was $382.9 million in 2022. We measure progress toward satisfaction of our grant performance obligations using an Estimate-at-Completion (“EAC”) process, which is a cost-based input method that reviews and monitors the progress towards the completion of our performance obligation. Under this process, we consider the costs that have been incurred to-date, as well as projections to completion using various inputs and assumptions, including, but not limited to, progress towards completion, labor costs and level of effort, material and subcontractor costs, indirect administrative costs, and other identified risks. Estimating the total allowable cost at completion of our performance obligation under a contract is subjective and requires us to make assumptions about future activity and cost drivers. Changes in these estimates can occur for a variety of reasons and, if significant, may impact the timing of revenue and fee recognition on our contracts. For our cost-reimbursable-plus-fixed-fee contracts, we recognize the fixed fee based on the proportion of reimbursable contract costs incurred to total estimated allowable contract costs expected to be incurred on completion of the underlying performance obligation as determined under the EAC process. Changes in estimates related to the EAC process are recognized in the period when such changes are made on a cumulative catch-up basis. We have not experienced any material difference as a result of change in estimate arising from the EAC process.

Lease Accounting

We enter into manufacturing supply agreements with CMOs and contract development and manufacturing organizations (“CDMOs”) to manufacture our vaccine candidates. Certain of these manufacturing supply agreements include the use of identified manufacturing facilities and equipment that are controlled by us and for which we obtain substantially all the output and may qualify as an embedded lease. The evaluation of leases that are embedded in our CMO and CDMO agreements is complex and requires judgment in determining whether the contract, either explicitly or implicitly, is for the use of an identified asset, which generally is the use of a portion of the manufacturing facility; whether we have the right to direct the use of, and obtain substantially all of the benefit from, the identified asset; the term of the lease; and the fixed lease payments under the contract. Determining the lease commencement date may require judgment because the lease commencement date may be different than the inception date of the contract. We determine the non-cancellable lease term of our embedded leases based on the impact of certain expected milestones on our option to terminate the lease where we are reasonably certain to not exercise that option. For leases that have a lease term of more than 12 months at the lease commencement date, we recognize lease liabilities and corresponding right-of-use (“ROU”) assets based on the present value of the fixed future payments over the lease term. We calculate the present value of future payments using the discount rate implicit in the lease, if available, or our incremental borrowing rate. In determining the lease period, we evaluate facts and circumstances that could affect the period over which we are reasonably certain to use the underlying asset while taking into consideration the non-cancelable period over which we have the right to use the underlying asset and any option period to extend or terminate the lease if we are reasonably certain to exercise the option. We use significant assumptions and judgment in evaluating our lease contracts and other agreements under ASC 842, including the determination of whether an agreement is or contains a lease, whether a change in the terms and conditions of a lease contract represent a new or modified lease, whether

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a lease represents an operating or finance lease, the discount rate used to determine the present value of lease obligations, and the term of embedded leases in our manufacturing supply agreements. As of December 31, 2022, we had total noncurrent ROU assets of $106.2 million, current lease liabilities of $44.1 million, and noncurrent lease liabilities of $81.3 million.

Pre-Launch Inventory

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 and, as of December 31, 2022, we had approximately $30.6 million of commercial inventory that was expensed prior to approval.

Inventory Realizability

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, 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.

Accounting for Research and Development Expenses

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 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.

Recent Accounting Pronouncements

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

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Results of Operations for Fiscal Years 2022 and 2021

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, 2021, compared to the year ended December 31, 2020, 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, 2021.

Revenue

Product sales

Product sales for 2022 were $1.6 billion as compared to no product sales for 2021. Product sales for 2022 related to revenue from commercial sales of NVX-CoV2373, which commenced in 2022. The geographic distribution of product sales in 2022 was as follows:

Grants

We recognized grant revenue as follows:

Grant revenue for 2022 was $382.9 million compared to $948.7 million for 2021, a decrease of $565.8 million. Grant revenue for 2022 primarily comprised revenue for services performed under the USG Agreement and grant revenue for 2021 primarily comprised revenue for services performed under the USG Agreement and the CEPI funding agreement. The decrease in revenue was primarily due to decreased development activities under the USG Agreement and our funding agreement with CEPI.

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Royalties and Other

Royalties and other revenue for 2022 was $44.0 million as compared to $197.6 million for 2021, a decrease of $153.6 million. Royalties and other revenue primarily related to royalties under our licensing arrangements, and the decrease in revenue was due to lower sales-based royalties from our license partners.

Expenses:

Cost of Sales

Cost of sales was $902.6 million, or 58% of product sales, for 2022, including expense of $603.5 million related to excess or obsolete inventory and losses on firm purchase commitments. Prior to receiving regulatory approval, we expensed manufacturing costs as research and development expenses. After receiving regulatory 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. However, based on our expectations for future manufacturing costs to produce our vaccine product and components inventory, we estimate at December 31, 2022 we had approximately $30.6 million of commercial inventory that was expensed prior to approval. We expect to utilize the majority of our reduced-cost inventory through 2023. If inventory and pre-launch inventory sold in 2022 was valued at expected standard cost, including expenses related to excess and obsolete inventory and losses on firm purchase commitments, adjusted cost of sales for the period would have been approximately $1,067.4 million, or 69% of product sales, an adjustment of $164.8 million as compared to cost of sales recognized. The cost of sales as a percentage of product sales may fluctuate in the future as a result of changes to our customer pricing mix or standard costs.

Research and Development Expenses

Research and development expenses decreased to approximately $1.2 billion for 2022 as compared to $2.5 billion for 2021, a decrease of $1.3 billion. The decrease was primarily due to a decrease in development activities relating to coronavirus vaccines, including NVX-CoV2373, an Omicron BA.1 vaccine candidate, bivalent formulations, and CIC, as summarized in the table below (in thousands):

Research and development expenses for coronavirus vaccines for 2022 and 2021 included a benefit of $201.4 million, inclusive of a $98.3 million benefit pursuant to the Fujifilm Settlement Agreement (see Note 4 to our consolidated financial statements in Part II, Item 8, “Financial Statements and Supplementary Data,” of this Annual Report on Form 10-K), and an

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expense of $239.2 million, respectively, related to previously accelerated manufacturing costs for leases that we determined were embedded in multiple 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 2023, we expect research and development expenses to decrease as compared to 2022 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, NVX-CoV2373 and as additional manufacturing activities that were previously recognized as research and development expenses begin to meet the criteria for capitalization as inventory. We are gating funding for our potential Phase 3 research and development expenses related to our influenza and CIC vaccine candidates based on the assessment of our Phase 2 clinical trial results anticipated for mid 2023.

Selling, General, and Administrative Expenses

Selling, general, and administrative expenses increased to $488.7 million for 2022 from $298.4 million for 2021, an increase of $190.3 million. The increase in selling, general, and administrative expenses is primarily due to a $149.5 million increase in expenses related to the commencement of our commercial sales operations.

For 2023, our expected selling, general, and administrative expenses levels may vary depending on our ability to successfully develop, manufacture, distribute, or market an updated monovalent or bivalent formulation of a vaccine candidate for COVID-19 for the fall 2023 COVID vaccine season. Due to this uncertainty, we have announced our intention to reduce and control our operating spend to focus on key priorities and we will continue to evaluate our level of investment as the year progresses.

Other Expense, Net:

We had total net other expense of $8.9 million for 2022 compared to total net other expense of $28.0 million for 2021, a decrease of $19.0 million. During 2022 and 2021, other income (expense) was primarily related to foreign exchange rate activity.

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Income Tax Expense:

During the years ended December 31, 2022 and 2021, we recognized $4.3 million and $29.2 million, respectively, of income tax expense related to federal and state income taxes and foreign withholding tax on royalties.

Net Loss:

Net loss for 2022 was $0.7 billion, or $8.42 per share, as compared to $1.7 billion, or $23.44 per share, for 2021, a decrease of $1.1 billion. The decrease in net loss was primarily due the commencement of commercial sales of NVX-CoV2373 in 2022 and a decrease in research and development expense, partially offset by the write-down of excess or obsolete inventory and losses on firm purchase commitments and decreased revenue under the USG Agreement.

The increase in weighted average shares outstanding for 2022 is primarily a result of sales of our common stock and common stock issued under our incentive programs.

Liquidity Matters and Capital Resources

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; funding and repayments under our grant agreements; our projected activities related to the development and commercial support of NVX-CoV2373 and variant candidates, 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 influenza vaccine candidate and 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 grant and license agreements. As of December 31, 2022, 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 $3 billion, which excludes amounts related to the Gavi APA and the reduction in doses related to the Amended and Restated UK Supply Agreement, as defined below. Failure to meet regulatory milestones, obtain timely supportive recommendations from governmental advisory committees, or achieve product volume or delivery timing obligations under our APAs may require us to refund portions of upfront 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 grant agreements will depend on the results of our research and development activities, including clinical trials, and delivery of doses. 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 NVX-CoV2373 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 NVX-CoV2373. Such upfront payments generally become non-refundable upon our achievement of certain development, regulatory, and commercial milestones.

In addition, we continue to assess our manufacturing needs and modify our global manufacturing footprint consistent with our contractual obligations to supply, and anticipated demand for, NVX-CoV2373, and, as a result, significant costs may be incurred. Pursuant to the Fujifilm Settlement Agreement (see Note 4 to our consolidated financial statements in Part II, Item 8, “Financial Statements and Supplementary Data,” of this this Annual Report on Form 10-K), we are responsible for a Settlement Payment of up to $185.0 million to Fujifilm in connection with cancellation of manufacturing activity at FDBT

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under the Fujifilm CSA, of which $47.8 million, constituting the initial reservation fee under the Fujifilm CSA, was credited against the Settlement Payment on September 30, 2022.

We have 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 NVX-CoV2373, 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 and are expected to be delivered in 2023.

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 NVX-CoV2373 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 NVX-CoV2373, 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 does not purchase the Conditional Doses or the number of such Conditional Doses is reduced below 15 million doses of NVX-CoV2373, 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 yet made a supportive recommendation with respect to NVX-CoV2373, 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, which is reflected in our consolidated balance sheet as Other current liabilities, with the remaining upfront payment balance of $112.5 million reflected in current Deferred revenue.

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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 the first quarter of 2022 related to our achieving EUL for NVX-CoV2373 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 NVX-CoV2373 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 contends that, based on its purported termination of the Gavi APA, it is 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, 2022, the remaining Gavi Advance Payment Amount of $697.4 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 in 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. Our response is currently due by March 2, 2023. Arbitration is inherently uncertain, and while we believe that we are entitled to retain the remaining Advance Payment Amount received from Gavi, it is possible that we could be required to refund all or a portion of the remaining Advance Payment Amount from Gavi.

In July 2022, we entered into a modification to the USG Agreement that amended the terms of such agreement to provide for (i) an initial delivery to the U.S. government of approximately 3 million doses of NVX-CoV2373 and (ii) any additional manufacture and delivery to the U.S. government up to an aggregate of 100 million doses of NVX-CoV2373 contemplated by the original USG Agreement (inclusive of the initial batch of approximately 3 million doses) dependent on U.S. government demand, FDA guidance on strain selection, agreement between the parties on the price of such doses, and available funding. Additionally, in July 2022, we entered into a modification to our existing agreement with the DoD that amended the terms of such agreement to provide for the initial delivery of 0.2 million doses of NVX-CoV2373 after receipt of EUA approval from the FDA, with delivery of the remaining 9.8 million doses of NVX-CoV2373 contemplated by the original agreement subject to DoD demand and available funding. 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. If the USG Agreement is not amended, as we had previously expected, then we may not receive all of the remaining $416 million in funding we had previously anticipated pursuant to the USG Agreement.

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 NVX-CoV2373 manufactured by the CMO network funded by CEPI is sold to one or more third parties (which would have previously included, but is not limited to, any sales under our Gavi APA prior to its termination), 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.

As of December 31, 2022, we had $1.3 billion in cash and cash equivalents and restricted cash as compared to $1.5 billion as of December 31, 2021. On January 31, 2023, we funded the outstanding principal amount of $325.0 million on the 2023 Notes, due February 1, 2023.

We funded our operations in 2022 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 NVX-CoV2373 vaccine development activities. We anticipate our future operations to be funded primarily by revenue from product sales, revenue under our USG Agreement, our cash and cash equivalents, and other potential funding sources.

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The following table summarizes cash flows for 2022 and 2021:

Net cash used in operating activities was $415.9 million for 2022, as compared to cash provided by operating activities of $322.9 million in 2021. The decrease in cash from operating activities is primarily due to a decrease in upfront payments received under our APAs, timing of payments to vendors, and an increase in inventory production, partially offset by a reduction in our net loss.

Our investing activities primarily consisted of capital expenditures and, in 2021, $159.8 million in proceeds from maturities and sale of marketable securities, net of purchases. Capital expenditures for the years ended December 31, 2022 and 2021 were $89.1 million and $54.5 million, respectively.

Our financing activities consisted primarily of sales of our common stock, issuance of our 2027 Notes, payments of finance lease liabilities, and exercises of stock-based awards. In 2022, we received net proceeds of approximately $179 million and $70 million from the sale of shares of common stock through our At Market Issuance Sales Agreements and a public offering at $10.00 per share, respectively. In addition, we received net proceeds of $166.4 million during 2022 through the issuance of our 2027 Notes (see Note 11 to the accompanying consolidated financial statements). In 2021, we received net proceeds of approximately $565 million from the sale of shares of common stock through our At Market Issuance Sales Agreements.

Going Concern

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. At December 31, 2022, we had $1.3 billion in cash and cash equivalents and restricted cash, of which $236.2 million was raised in December 2022 through concurrent sales of our common stock and issuance of our 2027 Notes. On January 31, 2023, the Company funded the outstanding principal amount of $325.0 million on the 2023 Notes. During 2022, we incurred a net loss of $657.9 million and had net cash flows used in operating activities of $415.9 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 2023 revenue, funding from the U.S. government, and pending arbitration. Our 2023 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 for the fall 2023 COVID vaccine season, which is inherently uncertain and subject to a number of risks, including regulatory approval. See “Risk Factors—Risks Related to Product Development and Commercialization—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 NVX-CoV2373, and our strategy to develop versions of our COVID-19 vaccine to protect against certain variants may not be successful.” 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, which may result in us not receiving all of the remaining $416 million in funding we had previously anticipated. See “Risk Factors—Risks Related to Our Financial Condition and Capital Requirements—Our existing funding and supply agreements do not assure success of our vaccine candidates or that we will be able to fully fund our vaccine candidates.” On January 24, 2023, Gavi filed a demand for arbitration with the International Court of Arbitration regarding an alleged material breach by us of the Gavi APA. The outcome of that arbitration is inherently uncertain, and it is possible we could be required to refund all or a portion of the remaining Advance payment Amount of $697.4 million. See Note 3 and Note 18 to our consolidated financial statements in Part II, Item 8,

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“Financial Statements and Supplementary Data,” of this Annual Report on Form 10-K for additional information related to the arbitration with Gavi. 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, including whether, when, and how the dispute with Gavi is resolved; and management’s plans, which include resolving the dispute with Gavi and 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 NVX-CoV2373 and our other vaccine candidates, including an influenza vaccine candidate, CIC vaccine candidate, or a COVID-19 variant strain-containing monovalent or bivalent formulation, 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.

Contractual Obligations

The following table summarizes our contractual obligations as of December 31, 2022 (in thousands):

(1)    We had $325.0 million of 3.75% convertible senior unsecured notes due February 1, 2023, which we repaid in full. In 2022, we issued $175.3 million of 5.00% convertible senior unsecured notes due in 2027. See “Note 11—Long-term Debt” included in our Notes to Consolidated Financial Statements for additional information related to our convertible notes.

(2)    This amount primarily represents our non-cancelable fixed payment obligations under certain CMO, CDMO, and lab 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, 2022, 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 in our consolidated balance sheets.

(3)    This relates to the lease of floor space at 700 Quince Orchard that had not commenced as of December 31, 2022 (see Note 10 to the consolidated financial statements).

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.

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Item 7.    MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

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 Novavax AB and Novavax CZ, 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; 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 NVX-CoV2373 by us and our partners; our expectations with respect to the anticipated ongoing development and commercialization or licensure of NVX-CoV2373 and NanoFlu Program; the expected timing, content, and outcomes of regulatory actions; funding from the U.S. government partnership formerly known as Operation Warp Speed (“OWS”), the U.S. Department of Defense (“DoD”) and the Coalition for Epidemic Preparedness Innovations (“CEPI”), and payments from the Bill & Melinda Gates Foundation (“BMGF”); funding under our advance purchase agreements and supply agreements; 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, challenges satisfying, alone or together with partners, various safety, efficacy, and product characterization requirements, including those related to process qualification and assay validation, necessary to satisfy applicable regulatory authorities, such as the U.S. Food and Drug Administration (“FDA”), World Health Organization (“WHO”), United Kingdom (“UK”) Medicines and Healthcare Products Regulatory Agency (“MHRA”), the European Medicines Agency (“EMA”), the Republic of Korea’s Ministry of Food and Drug Safety (“MFDS”), or Japan’s Ministry of Health, Labour and Welfare (“MHLW”); unanticipated challenges or delays in conducting clinical trials; 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 meeting contractual requirements under agreements with multiple commercial, governmental, and other entities; 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 United States Securities and Exchange Commission (“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.

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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.

Overview

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

Our vaccine candidates in our near-term pipeline, including both NVX-CoV2373 and the NanoFlu Program, are genetically engineered, three-dimensional nanostructures of recombinant proteins critical to disease pathogenesis. At the forefront of our pipeline is our COVID-19 vaccine candidate, NVX-CoV2373. NVX-CoV2373 has received provisional approval, conditional marketing authorization (“CMA”) and emergency use authorization (“EUA") from multiple regulatory authorities globally. In January 2022, we also submitted a request to the FDA for emergency use authorization of NVX-CoV2373. We also advanced our NanoFlu Program vaccine program through a Phase 3 clinical trial, which demonstrated positive top-line results and achieved statistical significance in key secondary endpoints. Additionally, we are currently evaluating a COVID-influenza combination vaccine in a Phase 1/2 clinical trial, which combines the company's NVX-CoV2373 and our NanoFlu Program vaccine candidates. We believe that our protein-subunit-based candidates elicit differentiated immune responses that may be more efficacious than naturally occurring immunity or other vaccine approaches. These vaccine candidates incorporate Novavax' proprietary saponin-based Matrix-M™ adjuvant to enhance the immune response and stimulate high levels of neutralizing antibodies.

We remain focused on the manufacturing and distribution to bring our NVX-CoV2373 vaccine candidate to market following global regulatory authorizations. Through ongoing booster studies in our clinical trials, as well as the development of COVID-19 variant strain vaccine candidates, we continue to collect data to characterize and optimize vaccine performance. We expect to leverage these clinical insights to advance the use of our COVID-19 vaccine for both primary vaccination around the globe, to use within a booster setting, and for the pediatric population amidst the ongoing and evolving COVID-19 pandemic.

Although NVX-CoV2373 and the NanoFlu Program are our near-term priorities, we remain optimistic that the additional programs in our pipeline, including our vaccine candidates in our RSV Program, and our partner-led malaria candidates, present strong opportunities for future development.

Business Highlights

Fourth Quarter 2021 and Recent Highlights

Achieved Multiple Regulatory Authorizations Globally for COVID-19 Vaccine

•Nuvaxovid™ was granted authorization (emergency, provisional, interim conditional or emergency use listing) in Great Britain, the European Union, the WHO, Canada, Australia, United Arab Emirates, Singapore, and New Zealand; received Biologics License Application approval in South Korea with our partner, SK bioscience

•Covovax™ was granted emergency use authorization in India, Indonesia, Philippines, Bangladesh, and emergency use listing from the WHO with our partner, SIIPL

Completed Multiple Regulatory Submissions Globally for COVID-19 Vaccine

•Completed regulatory submissions for authorization for NVX-CoV2373 in the U.S. and Switzerland

•SIIPL completed submission to South Africa, for NVX-CoV2373 to be marketed as CovovaxTM

•Takeda, our partner, completed submission to Japan for a New Drug Application

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COVID-19 Vaccine Advanced Purchase Agreement

•Executed APA with Israel’s Ministry of Health to supply a minimum of 5 million vaccine doses

◦Option to purchase an additional 5 million doses

COVID-19 Vaccine Manufacturing, Supply and Distribution

•Built manufacturing and robust supply network to support over 2 billion annual doses of capacity and initiated distribution of NVX-CoV2373 to begin fulfillment of our commitments

◦Expanded partnership with SIIPL through new supply agreement

◦Reserved significant additional manufacturing capacity with SK bioscience to produce antigen, and SK bioscience acquired non-exclusive rights to sell to governments in Thailand and Vietnam

◦Entered into a contract manufacturing agreement with Mabion for the large-scale manufacturing of NVX-CoV2373 through 2026

COVID-19 Vaccine Clinical Development

•Announced data from extended analysis of our UK Phase 3 study demonstrating ongoing durability of protection against infection and disease

◦82.5% vaccine efficacy in protection against all COVID-19 infection, both symptomatic and asymptomatic, as measured by PCR+ or anti-N seroconversion

◦82.7% overall vaccine efficacy against disease over a 6-month data collection period (median of 101 days of surveillance)

◦100% vaccine efficacy against severe disease

•Announced data from PREVENT-19 Phase 3 pediatric expansion in adolescents aged 12 through 17, achieving primary effectiveness endpoint and comparability to adult population

◦Adolescent neutralization responses ~1.5-fold higher than adults

◦82% clinical efficacy against Delta variant

◦IgG and functional immune responses against variants were higher than in adults

◦Generally well-tolerated with no safety signals

◦Expect to supplement global regulatory filings in the first quarter of 2022

◦Expect to initiate a pediatric study in younger children in the second quarter of 2022

•Initiated PREVENT-19 Phase 3 booster study to evaluate safety and efficacy of a third dose of NVX-CoV2373

•Heterologous boosting data announced in COV-Boost Phase 2 Study, with NVX-CoV2373 demonstrating its ability to serve as a well-tolerated third dose to boost immune levels

•Announced immunologic cross-reactivity data from vaccine booster and adolescent studies to highlight potential utility of NVX-CoV2373 against Omicron variant (B.1.1.529)

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◦Demonstrated broad IgG antibody cross-reactivity against Omicron and other circulating variants with primary 2-dose regimen

◦Third dose at 6-months produced increased immune response showing 9.3-fold IgG rise and 19.9-fold functional ACE2 inhibition increase

◦Ongoing PREVENT-19 Phase 3 pediatric expansion showed robust immune response 2-to-4-fold higher than adults against evaluated variants, including Omicron following primary 2-dose regimen

•Developed Omicron-specific vaccine with GMP manufacturing and lab-based assessments underway

◦Expect delivery toward the end of the first quarter of 2022

COVID-Influenza Combination Vaccine Clinical Development

•Ongoing Phase 1/2 trial for COVID-influenza combination vaccine

◦Data is expected in April 2022

◦Expect to initiate Phase 2 clinical trial for COVID-influenza combination vaccine and NanoFlu standalone in the second half of 2022

Publication Highlights

•Final analysis from PREVENT-19 Phase 3 trial in U.S. and Mexico published in The New England Journal of Medicine

•Final analysis from UK Phase 3 influenza co-administration sub-study published in The Lancet Respiratory Medicine

•Final analysis of COV-Boost study led by University of Southampton NHS published in The Lancet

Sales of Common Stock

During 2021, we issued and sold 2.6 million of shares of our common stock resulting in net proceeds of approximately $565 million under our various At Market Issuance Sales Agreements. The most recent At Market Issuance Sales Agreement, which we entered into in June 2021 (the “June 2021 Sales Agreement”) and is currently in effect, allows us to issue and sell up to $500 million in gross proceeds of shares of our common stock. In January 2022, we sold 0.4 million shares of our common stock resulting in net proceeds of $34.7 million under the June 2021 Sales Agreement, with a remaining balance of $464.9 million available thereafter.

Critical Accounting Policies and Use of Estimates

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 generally accepted accounting principles in the U.S.

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 revenue, lease accounting, pre-launch inventory, and accounting for 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.

Revenue Recognition

We perform research and development under government funding, grant, license and clinical development agreements. Our revenue primarily consists of funding under U.S. government contracts and other arrangements to advance the clinical

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development and manufacturing of NVX-CoV2373. Our U.S. government contracts include the DoD Contract and the OWS Agreement. Other funding arrangements primarily include a grant and forgivable loan funding from CEPI.

At contract inception, we analyze our revenue arrangements to determine the appropriate accounting under generally accepted accounting principles in the United States (“U.S. GAAP”). Currently, our revenue arrangements represent customer contracts within the scope of Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers (Topic 606) (“ASC 606”) or are subject to the contribution guidance in ASC Topic 958-605, Not-for-Profit Entities – Revenue Recognition (“ASC 958-605”), which applies to business entities that receive contributions within the scope of ASC 958-605. We recognize revenue from arrangements within the scope of ASC 606 following the five-step model: (i) identify the contract(s) with a customer; (ii) identify the performance obligation(s) in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) we satisfy a performance obligation. We only apply the five-step model to contracts when it is probable that we will collect the consideration we are entitled to in exchange for the goods or services we transfer to our customer. We recognize contribution revenue within the scope of ASC 958-605 when the funder-imposed conditions have been substantially met. Contributions are recorded as deferred revenue until the period in which research and development activities are performed that satisfy the funder-imposed conditions.

Under our U.S government contracts, we are entitled to receive funding, on a cost-reimbursable or cost-reimbursable-plus-fixed-fee basis, to support certain activities related to the development, manufacture, and delivery of NVX-CoV2373 to the U.S. government. We analyzed these contracts and determined that they are within the scope of ASC 606. Our obligations under each of the contracts are not distinct in the context of the contract as they are highly interdependent or interrelated and, as such, they are accounted for as a single performance obligation. The transaction price under these arrangements is the consideration we expect to receive and consists of the funded contract amount and the unfunded variable amount to the extent that it is probable that a significant reversal of revenue will not occur. We recognize revenue for these contracts over time as we transfer control over the goods and services and satisfy our performance obligation. We measure progress toward satisfaction of our performance obligation using an Estimate-at-Completion (“EAC”) process, which is a cost-based input method that reviews and monitors the progress towards the completion of our performance obligation. Under this process, we consider the costs that have been incurred to-date, as well as projections to completion using various inputs and assumptions, including, but not limited to, progress towards completion, labor costs and level of effort, material and subcontractor costs, indirect administrative costs, and other identified risks. Estimating the total allowable cost at completion of our performance obligation under a contract is subjective and requires us to make assumptions about future activity and cost drivers. Changes in these estimates can occur for a variety of reasons and, if significant, may impact the timing of revenue and fee recognition on our contracts. Allowable contract costs include direct costs incurred on the contract and indirect costs that are applied in the form of rates to the direct costs. Progress billings under the contracts are initially based on provisional indirect billing rates, agreed upon between us and the U.S. government. These indirect rates are subject to review on an annual basis. The impact of changes in the indirect billing rates are recorded in the period when such changes are identified and reflect the difference between actual indirect costs incurred compared to the estimated amounts used to determine the provisional indirect billing rates agreed upon with the U.S. government. We recognize revenue on our U.S government contracts based on reimbursable allowable contract costs incurred in the period up to the transaction price. For our cost-reimbursable-plus-fixed-fee contracts, we recognize the fixed fee based on the proportion of reimbursable contract costs incurred to total estimated allowable contract costs expected to be incurred on completion of the underlying performance obligation as determined under the EAC process. Changes in estimates related to the EAC process are recognized in the period when such changes are made on a cumulative catch-up basis. We include the transaction price comprising both funded and unfunded portions of customer contracts, in this estimate. We have not experienced any material difference as a result of change in estimate arising from the EAC process.

Our other funding arrangements primarily include the CEPI Grant Funding and CEPI Forgivable Loan Funding (each as defined in “Note 2―Summary of Significant Accounting Policies” included in our Notes to Consolidated Financial Statements). The CEPI Forgivable Loan Funding is designated for the prepayment of certain manufacturing activities. We analyzed these other funding arrangements and determined that they are not within the scope of ASC 606 as they do not provide a direct economic benefit to the grantor. Payments received under the grant funding arrangements are considered conditional contributions under the scope of ASC 958-605 and are recorded as deferred revenue until the period in which such research and development activities are actually performed that satisfy the funder-imposed conditions. Payments received under the CEPI Forgivable Loan Funding are only repayable if the proceeds of sales to one or more third parties of NVX-CoV2373 cover our costs of manufacturing such vaccine candidate, not including manufacturing costs funded by CEPI. As the financial risk remains with CEPI, we have determined that the use of the CEPI Forgivable Loan Funding is outside the scope of ASC Topic 470, Debt. The research and development risk is considered substantive, such that it was not probable that the development would be successful at the inception of the contract. Therefore, we have concluded that ASC Topic 730, Research and Development is considered applicable and most appropriate. Given the financial risk associated with the research and development activities lies with CEPI because repayment of any funds provided by CEPI depends solely on the results of the research and development activities having future economic benefit, we account for our obligation under the CEPI Forgivable

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Loan Funding as a contract to perform research and development for others. We have determined that payments received under these agreements should be recorded as revenue under ASC 958-605 rather than a reduction to research and development expenses. This is consistent with our policy of presenting such amounts as revenue. In reaching this determination, we considered a number of factors, including whether we are principal under the arrangement, and whether the arrangement is significant to, and part of, our core operations. We will record revenue as we perform the contractual research and development services.

We have manufacturing and supply arrangements that include a license to use our intellectual property. The licensing arrangements include sales-based royalties, certain development and commercial milestone payments, and the sale of proprietary Matrix-MTM adjuvant. The license is deemed to be the predominant item to which the milestone payments and sales-based royalties relate. Because development milestone payments are contingent on the achievement of milestones that are not within our control or the control of the licensee, such as regulatory approvals, the payments are not considered probable of being achieved and are excluded from the transaction price until the milestone is achieved. We recognize revenue when the development milestone is achieved. For arrangements that include sales-based royalties, including milestone payments based upon the achievement of a certain level of product sales, wherein the license is deemed to be the sole or predominant item to which the payments relate, we recognize revenue on the satisfaction (or partial satisfaction) of the performance obligation to which some or all of the payment has been allocated, which is normally when the related sales occur.

We generally allocate the transaction price to each performance obligation based on a relative standalone selling price basis. We develop assumptions that require judgment to determine the standalone selling price for each performance obligation in consideration of applicable market conditions and relevant entity-specific factors, including factors that were contemplated in negotiating the agreement with the customer.

Lease Accounting

We enter into manufacturing supply agreements with CMOs and CDMOs to manufacture our vaccine candidates. Certain of these manufacturing supply agreements include the use of identified manufacturing facilities and equipment that are controlled by us and for which we obtain substantially all the output and may qualify as an embedded lease. We treat manufacturing supply agreements that contain a lease as lease arrangements in their entirety. The evaluation of leases that are embedded in our CMO and CDMO agreements is complex and requires judgment in determining whether the contract, either explicitly or implicitly, is for the use of an identified asset, which generally is the use of a portion of the manufacturing facility, whether we have the right to direct the use of, and obtain substantially all of the benefit from, the identified asset, the term of the lease and the fixed lease payments under the contract. Depending on the contract, the lease commencement date, defined as the date on which the lessor makes the underlying asset available for use by the lessee and is the date on which the Company is required to accrue lease expenses, may be different than the inception date of the contract. We determine the non-cancellable lease term of our embedded leases based on the impact of certain expected milestones on our option to terminate the lease where we are reasonably certain to not exercise that option. We evaluate changes to the terms and conditions of a lease contract to determine if they result in a new lease or a modification of an existing lease. For lease modifications, we remeasure and reallocate the remaining consideration in the contract and reassess the lease classification at the effective date of the modification. We classify leases as either operating or finance leases based on the economic substance of the agreement. We also enter into non-cancelable lease agreements for facilities and certain equipment.

For leases that have a lease term of more than 12 months at the lease commencement date, we recognize lease liabilities, which represent our obligation to make lease payments arising from the lease, and corresponding right-of-use (“ROU”) assets, which represent the right to use an underlying asset for the lease term, based on the present value of the fixed future payments over the lease term. We calculate the present value of future payments using the discount rate implicit in the lease, if available, or our incremental borrowing rate. For all leases that have a lease term of 12 months or less at the commencement date (referred to as “short-term” leases), we have elected to apply the practical expedient in ASC Topic 842, Leases (“ASC 842”) to not recognize a lease liability or ROU asset but instead, recognize lease payments as an expense on a straight-line basis over the lease term and variable lease payments that do not depend on an index or rate, as an expense in the period in which the variable lease costs are incurred based on performance or usage in accordance with contractual agreements. In determining the lease period, we evaluate facts and circumstances that could affect the period over which we are reasonably certain to use the underlying asset while taking into consideration the non-cancelable period over which we have the right to use the underlying asset and any option period to extend or terminate the lease if we are reasonably certain to exercise the option. We re-evaluate short-term leases that are modified and if they no longer meet the requirements to be treated as a short-term lease, we recognize and measure the lease liability and ROU asset as if the date of the modification is the lease commencement date (see Note 7 to the accompanying consolidated financial statements). For short-term leases that are modified and continue to meet the requirements to be treated as a short-term lease, we remeasure the fixed lease payments under the modified lease, and recognize lease payments as an expense on a straight-line basis over the modified lease term.

For operating leases, we recognize lease expense related to fixed payments on a straight-line basis over the lease term and lease expense related to variable payments as incurred based on performance or usage in accordance with the contractual agreements. For finance leases, we recognize the amortization of the ROU asset over the shorter of the lease term or useful life

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of the underlying asset. We expense ROU assets acquired for research and development activities under ASC Topic 730, Research and Development, if they do not have an alternative future use, in research and development projects or otherwise.

We use significant assumptions and judgment in evaluating our lease contracts and other agreements under ASC 842, including the determination of whether an agreement is or contains a lease, whether a change in the terms and conditions of a lease contract represent a new or modified lease, whether a lease represents an operating or finance lease, the discount rate used to determine the present value of lease obligations and the term of embedded leases in our manufacturing supply agreements.

Pre-Launch Inventory

Prior to an initial regulatory authorization for our product candidates, we expense costs relating to raw materials and inventory production as research and development expenses in our consolidated statements of operations in the period incurred. We capitalize the costs of production as inventory when we believe regulatory authorization and subsequent commercialization is considered probable and we expect to realize future economic benefit from the sales of the product candidate.

Upon the authorization of distribution and use of NVX-CoV2373 following regulatory authorization by EMA and the WHO in December 2021, we began to capitalize inventory costs associated with the related supply of NVX-CoV2373, as it was determined that inventory costs subsequently incurred had a probable future economic benefit.

Accounting for Research and Development Expenses

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 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, as well as 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.

Recent Accounting Pronouncements

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

Results of Operations for Fiscal Years 2021 and 2020

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.

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For our discussion of the year ended December 31, 2020, compared to the year ended December 31, 2019, 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, 2020.

Revenue

Grants

The Company recognized grant revenue as follows:

(a) U.S. government partnership formerly known as Operation Warp Speed

Grant revenue for 2021 was $948.7 million as compared to $453.2 million for 2020, an increase of $495.5 million. Grant revenue for 2021 and 2020 primarily comprised revenue for services performed under the OWS Agreement and CEPI Funding Agreement. The increase in revenue was primarily due to increased development activities related to NVX-CoV2373 under the OWS Agreement.

Royalties and Other

Royalties and other revenue for 2021 was $197.6 million as compared to $22.4 million for 2020, an increase of $175.2 million. Royalties and other revenue primarily comprised royalties under our licensing arrangements, and the increase in revenue was due to increased sales-based royalties by our license partners to South Korea and Indonesia.

We expect revenue in 2022 to significantly increase as compared to 2021 due to our NVX-CoV2373 program, which we anticipate will continue to be funded by OWS and/or other revenue sources. Further, we anticipate bringing our NVX-CoV2373 vaccine candidate to market following receipt of global regulatory authorizations, and potential approvals that should significantly increase revenue (also see below under Liquidity and Capital Resources in this Management's Discussion and Analysis). In anticipation, we have entered into various APAs, as well as multiple collaboration and license agreements with strategic partners, to supply NVX-CoV2373 in their specified territories under which we are entitled to receive royalty revenue from the sale of NVX-CoV2373 by such partners.

Expenses:

Research and Development Expenses

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Research and development expenses increased to approximately $2.5 billion for 2021 as compared to $747.0 million for 2020, an increase of $1.8 billion, due to increased development activities relating to NVX-CoV2373, as summarized in the table below.

Research and development expenses for NVX-CoV2373 for 2021 and 2020 included approximately $239 million and $217 million, respectively, related to the acceleration of manufacturing costs for leases that we determined were embedded in multiple manufacturing supply agreements with CMOs and CDMOs.

During 2021 and 2020, our research and development activities were primarily focused on the development of NVX-CoV2373 and included direct external research and development expenses related to NVX-CoV2373 of $2.2 billion and $609.4 million, respectively, primarily comprised of costs related to the following:

•expenses incurred under agreements with CROs that conduct our clinical trials and third-party consultants related to the development of NVX-CoV2373;

•expenses incurred on developing and manufacturing the antigen drug substance and Matrix-M™ adjuvant components of NVX-CoV2373 under agreements that we established with third-party CMOs and CDMOs;

•expenses incurred for the procurement of raw materials, laboratory supplies, and equipment; and

•other costs related to preclinical studies and regulatory consulting, as well as related program management activities to support our growing global operations.

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.

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For 2022, we expect total research and development expenses to decrease significantly as compared to 2021. The decline in 2022 is anticipated to result from expected capitalization of manufacturing costs during 2022 that were previously recognized as research and development expenses in prior periods, partially offset by research and development expenses related to increased clinical activities as we continue to develop our NVX-CoV2373 and other programs. Our cost of goods sold expenses could be significant depending on our commercial shipment levels and timing of deliveries. However, we anticipate initially recognizing a lower cost of goods sold expense as a result of pre-launch inventory previously recognized as research and development expenses.

General and Administrative Expenses

General and administrative expenses increased to $298.4 million for 2021 from $145.3 million for 2020, an increase of $153.1 million. The increase in general and administrative expenses is primarily due to increased employee-related costs, including stock-based compensation expense, and an increase in professional fees in support of our NVX-CoV2373 program.

For 2022, we expect general and administrative expenses to increase significantly as compared to 2021 due to increased activities related to supporting our NVX-CoV2373 program and increases in employee-related costs and professional fees. We also expect to incur selling and marketing expenses following regulatory authorizations, and potential approvals, of NVX-CoV2373.

Other Income (Expense):

We had total other expense, net of $28.0 million for 2021 compared to total other expense, net of $1.5 million for 2020, an increase of $26.4 million. In 2021 and 2020, interest expense included $7.2 million and $3.1 million, respectively, related to finance leases. In 2021 and 2020, other income included a loss of $7.2 million and a gain of $12.6 million, respectively, due to changes in the foreign exchange rates, primarily on an intercompany loan with Novavax CZ.

Income Tax Expense:

During the year ended December 31, 2021, we recognized $29.2 million of income tax expense related to foreign withholding tax on royalties. We did not recognize any income tax expense for the year ended December 31, 2020.

Net Loss:

Net loss for 2021 was $1.7 billion, or $23.44 per share, as compared to $418.3 million, or $7.27 per share, for 2020, an increase of $1.3 billion. The increase in net loss was primarily due to increased development activities relating to NVX-CoV2373, partially offset by increased revenue under the OWS Agreement and, to a lesser extent, royalties under our licensing arrangements.

The increase in weighted average shares outstanding for 2021 is primarily a result of sales of our common stock in 2021 and 2020.

Liquidity Matters and Capital Resources

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Our future capital requirements depend on numerous factors including, but not limited to, our projected activities related to the development of NVX-CoV2373, 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 NanoFlu vaccine candidate and potential combination vaccines candidates, which are in various stages of development. We believe our operating expenses and capital requirements will fluctuate depending upon the timing of events, such as the progress of our NVX-CoV2373 clinical trials and regulatory approval for the use of NVX-CoV2373 in the U.S. and internationally, as well as the scope, initiation and progress of our preclinical studies and clinical trials related to other research and development activities.

We have entered into APAs or supply agreements with Gavi, the EC, and various countries globally. We also have grant and license agreements. As of December 31, 2021, 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 $8 billion. The timing to fulfill performance obligations related to grant agreements will depend on the results of our research and development activities, including clinical trials. The timing to fulfill performance obligations related to APAs will depend on timing of product manufacturing, delivery, and receipt of marketing authorizations. The remaining unfilled performance obligations are expected to be fulfilled in less than one year. The APAs or 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. Such upfront payments generally become non-refundable upon our achievement of certain development and commercial milestones. However, certain of the APAs and supply agreements may be terminated by the counterparty if we do not timely achieve requisite regulatory approval for NVX-CoV2373 in the relevant jurisdictions under such agreements. If the APAs or supply agreements were terminated, the refundable portion of the upfront payments will be repaid. We expect to sign additional APAs or supply agreements that are currently in active discussions and negotiations.

In May 2021, we finalized an APA with Gavi, building upon our MOU previously announced in February 2021. Under the terms of the agreement, 1.1 billion doses of NVX-CoV2373 are 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 expect to manufacture and distribute 350 million doses of NVX-CoV2373 to countries participating under the COVAX Facility. Under a separate purchase agreement with Gavi, SIIPL is expected to manufacture and deliver the balance of the 1.1 billion doses of NVX-CoV2373 for low- and middle-income countries participating in the COVAX Facility. We expect to deliver doses with antigen and adjuvant manufactured at facilities directly funded by the investments previously received from CEPI. In October 2021, we entered into a supply agreement and a contract development manufacturing agreement with SIIPL and SLS under which SIIPL and SLS will supply us with NVX-CoV2373. We expect to deliver doses with antigen and adjuvant manufactured at facilities directly funded under the funding agreement with CEPI, with initial doses supplied by SIIPL and SLS under the supply agreement. We expect 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 may prioritize such doses to low- and middle- income countries, at lower prices. Additionally, we may provide additional doses, to the extent available from CEPI-funded manufacturing facilities, in the event that SIIPL cannot materially deliver expected vaccine doses to the COVAX Facility. Together with SIIPL, we expect to initiate delivery of doses following receipt of appropriate regulatory authorizations. Under the APA, we received an upfront payment of $350 million from Gavi in 2021 and recorded a receivable as of December 31, 2021, for an additional $350 million because the Company secured EUL for NVX-CoV2373 by the WHO in December 2021, which are recorded as deferred revenue.

We have also entered into supply and license agreements with strategic partners to supply NVX-CoV2373 in their specified territories under which we are entitled to receive royalties primarily from the sale of NVX-CoV2373 by our partners, such as SIIPL in India, Takeda in Japan, and SK bioscience in the Republic of Korea. During 2021, we received royalties of $195.8 million under these licensing arrangements.

We funded our operations in 2021 with cash and marketable securities on hand, upfront payments under APAs, and proceeds from the sale of common stock, together with revenue under the OWS Agreement and CEPI Funding Agreement that support our NVX-CoV2373 vaccine development activities. We anticipate our future operations to be funded by our cash, cash equivalents and marketable securities, upfront payments under our APAs and revenue under our OWS Agreement, and, following receipt of global regulatory authorizations, and potential approvals, revenue from product sales, royalties under licensing arrangements with our strategic partners, and/or other potential funding sources.

As of December 31, 2021, we had $1.5 billion in cash and cash equivalents, marketable securities, and restricted cash as compared to $806.4 million as of December 31, 2020. These amounts consisted of $1.5 billion in cash and cash equivalents,

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no marketable securities, and $13.1 million in restricted cash as of December 31, 2021 as compared to $553.4 million in cash and cash equivalents, $157.6 million in marketable securities, and $95.3 million in restricted cash as of December 31, 2020.

The following table summarizes cash flows for 2021 and 2020:

Net cash provided by operating activities increased to $322.9 million for 2021, as compared to $42.5 million used in 2020. The increase in cash provided is primarily due to payments under APAs recorded as deferred revenue, partially offset by funding of our increased net loss and the timing of payments to third parties.

During 2021, our investing activities primarily consisted of capital expenditures and purchases and maturities of marketable securities. During 2020, our investing activities primarily consisted of capital expenditures, purchases and maturities of marketable securities, and our acquisition of Novavax CZ. Capital expenditures for the years ended December 31, 2021 and 2020 were $57.5 million and $54.6 million, respectively. For 2022, we expect an increase in our capital expenditures due to further development activities for our NVX-CoV2373 program, including the additional build out of research and development and manufacturing facilities and related equipment, and the build-out of our new corporate office facility to accommodate anticipated increases in headcount.

Our financing activities consisted primarily of sales of our common stock under our At Market Issuance Sales Agreements, finance lease payments related to embedded leases and, to a much lesser extent, exercises of stock-based awards and purchases under our employee stock purchase plan. In 2021, we received net proceeds of approximately $565 million from the sale of shares of common stock through our At Market Issuance Sales Agreements. In 2020, we received net proceeds of approximately $877 million (this amount excludes $3.2 million received in the first quarter of 2021 for shares traded in late December 2020) from selling shares of common stock through our various At Market Issuance Sales Agreements and approximately $200 million through the issuance of preferred stock in a private placement.

Contractual Obligations

The following table summarizes our contractual obligations as of December 31, 2021 (in thousands):

(a)    See Note 8 to the consolidated financial statements included in this Annual Report on Form 10-K regarding our Notes, which will mature on February 1, 2023, and bear cash interest of 3.75%, payable February 1 and August 1 of each year.

(b)    This amount primarily represents our non-cancelable fixed payment obligations under certain CMO, CDMO, and lab 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, 2021, these agreements are active

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ongoing arrangements and the Company expects to receive value from these arrangements in the future. The exact amount of such obligations is dependent on the timing of termination, and the exact terms of the relevant agreement, and cannot be reasonably estimated.

(c)    This relates to the lease of 700 Quince Orchard that did not commence as of December 31, 2021 (see Note 7 to the consolidated financial statements).

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, and 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.