Revenue

12 Months Ended

Dec. 31, 2023

Grants, U.S. Government Contract and Joint Venture [Abstract]

Revenue

Revenue

The Company's accounts receivable, net, included $286.4 million and $53.8 million related to amounts that were billed to customers and $10.8 million and $28.6 million related to amounts which had not yet been billed to customers as of December 31, 2023 and 2022, respectively. During the years ended December 31, 2023 and 2022, changes in the Company's accounts receivables, deferred revenue, and allowance for doubtful accounts balances were as follows (in thousands):

	Balance, Beginning of Period		Additions		Deductions		Balance, End of Period
Accounts receivable:
Year ended December 31, 2023	$	96,210	$	1,472,768	$	(1,264,062)	$	304,916
Year ended December 31, 2022	454,993		1,768,457		(2,127,240)		96,210
Allowance for doubtful accounts(1):
Year ended December 31, 2023	(13,835)		—		6,159		(7,676)
Year ended December 31, 2022	—		(13,835)		—		(13,835)
Deferred revenue(2):
Year ended December 31, 2023	549,551		581,569		(267,599)(3)		863,521
Year ended December 31, 2022	1,595,472		46,908		(1,092,829)		549,551

(1)    Bad debt expense was $13.8 million in the year ended 2022. There was no bad debt expense in the year ended December 31, 2023 or 2021. There was a $6.2 million reversal of a bad debt expense during the year ended December 31, 2023 due to the collection of a previously recognized allowance for doubtful accounts. To estimate the allowance for doubtful accounts, the Company evaluates the credit risk related to its customers based on historical loss experience, economic conditions, the aging of receivables, and customer-specific risks.

(2)    Deductions from Deferred revenue generally related to the recognition of revenue once performance obligations on a contract with a customer are met. Amount is comprised of $241.3 million, $0.4 billion, and $1.4 billion current Deferred

revenue and $622.2 million, $179.4 million, and $172.5 million non-current Deferred revenue as of December 31, 2023, 2022, and 2021 respectively.

(3)    In 2023, deductions from Deferred revenue included $151.1 million that was realized in Revenue and $112.5 million related to the Amended and Restated UK Supply Agreement (as described below), that was reclassified to Other current liabilities, as described below. In 2022, deduction from Deferred revenue included $273.8 million that was realized in Revenue and $819.0 million, including $697.4 million related to the Advance Payment Amount (as described below) related to the Gavi arbitration and $112.5 million related to the Amended and Restated UK Supply Agreement, that was reclassified to Other current liabilities, as described below.

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, the Gavi APA, and the reduction in doses related to the Amended and Restated SARS-CoV-2 Vaccine Supply Agreement, dated as of July 1, 2022 (as amended on September 26, 2022, the “Amended and Restated UK Supply Agreement”) between the Company 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”), which amended and restated the Original UK Supply Agreement, was approximately $2 billion of which $863.5 million was included in Deferred revenue. Failure to meet regulatory milestones, obtain timely supportive recommendations from governmental advisory committees, or achieve product volume or delivery timing obligations under the Company’s APAs may require the Company to refund portions of upfront payments or result in reduced future payments, which could adversely impact the Company’s ability to realize revenue from its unsatisfied performance obligations. 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 in place of the prototype vaccine under certain of the Company’s APAs. The remaining unfilled performance obligations not related to APAs are expected to be fulfilled in less than one year.

Under the terms of the Gavi APA and a separate purchase agreement between Gavi and SIIPL, 1.1 billion doses of the prototype vaccine were to be made available to countries participating in the COVAX Facility. The Company expected to manufacture and distribute 350 million doses of the prototype vaccine to countries participating under the COVAX Facility. Under a separate purchase agreement with Gavi, SIIPL was expected to manufacture and deliver the balance of the 1.1 billion doses of prototype vaccine for low- and middle-income countries participating in the COVAX Facility. The Company expected to deliver doses with antigen and adjuvant manufactured at facilities directly funded under the Company's funding agreement with CEPI, with initial doses supplied by SIIPL and SLS under a supply agreement. The Company expected to supply significant doses that Gavi would allocate to low-, middle- and high-income countries, subject to certain limitations, utilizing a tiered pricing schedule and Gavi could prioritize such doses to low- and middle- income countries, at lower prices. Additionally, the Company could provide additional doses of prototype vaccine, to the extent available from CEPI-funded manufacturing facilities, in the event that SIIPL could not materially deliver expected vaccine doses to the COVAX Facility. Under the agreement, the Company received an upfront payment of $350.0 million from Gavi in 2021 and an additional payment of $350.0 million in 2022 related to the Company’s achieving an emergency use license for the Company’s prototype vaccine by the World Health Organization (“WHO”) (the “Advance Payment Amount”).

On November 18, 2022, the Company 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 the Company’s prototype vaccine from the Company as required by the Gavi APA. As of November 18, 2022, the Company had only received orders under the Gavi APA for approximately 2 million doses. On December 2, 2022, Gavi issued a written notice purporting to terminate the Gavi APA based on Gavi’s contention that the Company repudiated the agreement and, therefore, materially breached the Gavi APA. Gavi also contended that, based on its purported termination of the Gavi APA, it was entitled to a refund of the Advance Payment Amount less any amounts that have been credited against the purchase price for binding orders placed by a buyer participating in the COVAX Facility. As of December 31, 2023 and 2022, the remaining Gavi Advance Payment was $696.4 million and $697.4 million, respectively, pending resolution of the dispute with Gavi related to the return of the remaining Advance Payment Amount, and was classified within Other current liabilities in the Company’s consolidated balance sheet. On January 24, 2023, Gavi filed a demand for arbitration with the International Court of Arbitration based on the claims described above. The Company filed its Answer and Counterclaims on March 2, 2023. On April 5, 2023, Gavi filed its Reply to the Company’s Counterclaims. On February 16, 2024, the Company and Gavi entered into a Termination and Settlement Agreement (the “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, the Company is responsible for payment to Gavi of (i) an initial settlement payment of $75 million, which the Company paid on February 20,

2024, and (ii) deferred payments, in equal annual amounts of $80 million payable each calendar year through a deferred payment term ending December 31, 2028. The deferred payments are due in variable quarterly installments beginning in the first quarter of 2024 and total $400 million during the deferred payment term. Such deferred payments may be reduced through Gavi’s use of an annual vaccine credit equivalent to the unpaid balance of such deferred payments each year, which may be applied to qualifying sales of any of the Company’s vaccines for supply to certain low-income and lower-middle income countries. The Company has the right to price the vaccines offered to such low-income and lower-middle income countries in its discretion, and, when utilized by Gavi, the Company will credit the actual price per vaccine paid against the applicable credit. The Company intends to price vaccines offered via the tender process, consistent with its shared goal with Gavi to provide equitable access to those countries. Also, pursuant to the Gavi Settlement Agreement, the Company granted Gavi an additional credit of up to $225 million that may be applied against qualifying sales of any of the Company’s 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 addition, the Company and Gavi entered into a security agreement pursuant to which Novavax granted Gavi a security interest in accounts receivable from SIIPL under the SIIPL R21 Agreement (see Note 4), 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.

Product Revenue

Product revenue by the Company’s customer’s geographic location was as follows (in thousands):

	December 31, 2023		December 31, 2022
North America	$	29,959	194,480
Europe	268,361		823,542
Rest of the world	233,069		536,939
Total product revenue	$	531,389	$	1,554,961

In the fourth quarter of 2023, the Company commenced sales of COVID-19 Vaccine to the U.S. commercial market, in addition to continuing sales to various international governments. Product sales in the U.S. are primarily made through large pharmaceutical wholesale distributors at the WAC. Product sales in the U.S. are recorded net of gross-to-net deductions, as described in Note 2.

During the year ended December 31, 2023, changes in the Company’s gross-to-net deductions balances were as follows (in thousands):

	Wholesale Distributor Fees, Discounts, and Chargebacks		Product Returns		Total
Balance as of December 31, 2022	$	—	$	—	$	—
Amounts charged against product sales	47,028		$	84,688	$	131,716
Payments	$	(25,956)	$	(72)	$	(26,028)
Balance as of December 31, 2023	$	21,072	$	84,616	$	105,688

As of December 31, 2023, $103.1 million of gross-to-net deductions were included in Accrued expenses and $2.6 million were included in Accounts receivable on the consolidated balance sheet.

The Company has an APA with the Commonwealth of Australia for the purchase of doses of COVID-19 Vaccine (the “Australia APA”). In May 2023, the Company extended a credit for certain doses delivered and recognized within product revenue in 2022 that qualified for replacement under the Australia APA. This credit is the result of a single lot sold to the Australian government that upon pre-planned 6-month stability testing was found to have fallen below the defined specifications and the lot therefore was removed from the market. The credit will be applied against the future sale of doses to Australia and, during the year ended December 31, 2023, the Company recorded a reduction of $64.7 million in product sales, with a corresponding increase to Deferred revenue, non-current. In July 2023, the Company amended the Australia APA to provide for replacement doses and to extend the delivery schedule through 2025. As of February 2024, the Company had not yet received Therapeutic Goods Administration (“TGA”) authorization or delivered doses as contemplated in the July 2023

amendment and is 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, the Company received notice from the Australian government purporting to cancel its order for such prototype vaccine doses. The Company believes 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.

The Company has an APA with the European Commission (“EC”) acting on behalf of various European Union member states to supply a minimum of 20 million and up to 100 million initial doses of prototype vaccine, with the option for the EC to purchase an additional 100 million doses up to a maximum aggregate of 200 million doses in one or more tranches, through 2023. Under the terms of the APA, the Company agreed to manufacture the vaccine in facilities located in the European Union and ensure continued efficacy of the vaccine against variants of the SARS-CoV-2 virus. Pursuant to the terms of the APA, the Company is prohibited from supplying prototype vaccine to any third party if such delivery would impede or limit the fulfillment of the Company’s obligations to the EC under the APA, except with respect to the Company’s obligations under the Gavi APA. In 2022, the Company was 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, the Company finalized a revised delivery schedule for the remaining 20 million committed doses under the APA that were originally scheduled for delivery during the first and second quarters of 2022. The APA expired in August 2023 and required that any open and outstanding orders from European Union member states be satisfied by February 2024. Since August 2023, any additional doses have been managed by amending outstanding orders with deliveries made by February 2024.

The Company has an APA with His Majesty the King in Right of Canada as represented by the Minister of Public Works and Government Services, as successor in interest to Her Majesty the Queen in Right of Canada, as represented by the Minister of Public Works and Government Services (the “Canadian government”), for the purchase of doses of COVID-19 Vaccine (the “Canada APA”). In April 2023, the Company 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 the Company received in the second quarter of 2023. In June 2023, the Company 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 the Company 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 the Company fails to receive regulatory approval for its COVID-19 Vaccine using bulk antigen produced at BMC on or before December 31, 2024. The Company’s 2024 plans do not currently anticipate the submission for regulatory approval of its COVID-19 Vaccine using bulk antigen produced at BMC, and it plans 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 in the Company’s 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. Pursuant to the June 2023 Amendment, Novavax and the Canadian government will endeavor to expand the previously agreed in-country commitment to Canada and to further partner to provide health, economic, and future pandemic preparedness benefits to Canada, which value may be provided through a number of activities, including without limitation, capital investments, the performance of activities or services, or the provision of technology or intellectual property licenses. Further, the parties will endeavor to enter into a memorandum of understanding (the “MOU”) to illustrate the Company’s 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 the Company. As of December 31, 2023, discussions regarding the MOU were ongoing. The Company agreed to hold, when received, $20.0 million of the second installment payment in escrow for the benefit of the Canadian government, which amount is the sole recourse available to the Canadian government in the event of non-performance under the MOU.

In July 2022, the Company entered into an Amended and Restated SARS-CoV-2 Vaccine Supply Agreement (as amended on September 26, 2022, the “Amended and Restated UK Supply Agreement”) with The Secretary of State for

Business, Energy and Industrial Strategy (as assigned to the UK Health Security Agency), acting on behalf of the government of the United Kingdom of Great Britain and Northern Ireland (the “Authority”), which amended and restated in its entirety the SARS-CoV-2 Vaccine Supply Agreement, dated October 22, 2020, between the parties (the “Original UK Supply Agreement”). Under the Original UK Supply Agreement, the Authority agreed to purchase 60 million doses of prototype vaccine and made an upfront payment to the Company. Under the terms of the Amended and Restated UK Supply Agreement, the Authority agreed to purchase a minimum of 1 million doses and up to an additional 15 million doses (the “Conditional Doses”) of prototype vaccine, with the number of Conditional Doses contingent on, and subject to reduction based on, the Company’s timely achievement of supportive recommendations from the Joint Committee on Vaccination and Immunisation (the “JCVI”) that is approved by the UK Secretary of State for Health, with respect to use of the vaccine for (a) the general adult population as part of a SARS-CoV-2 vaccine booster campaign in the United Kingdom or (b) the general adolescent population as part of a SARS-CoV-2 vaccine booster campaign in the United Kingdom or as a primary series SARS-CoV-2 vaccination, excluding where that recommendation relates only to one or more population groups comprising less than one million members in the United Kingdom. If the Authority did not purchase the Conditional Doses or the number of such Conditional Doses was reduced below 15 million doses of prototype vaccine, the Company 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 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, the Company’s 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 the Company to repay $112.5 million related to the upfront payment previously received from the Authority under the Original UK Supply Agreement. In April 2023, the Company repaid the $112.5 million related to the November 30, 2022 triggering event. As of November 30, 2023, the JCVI had not made a supportive recommendation with respect to the prototype vaccine, thereby triggering a reduction in the number of Conditional Doses from 7.5 million doses to zero. As of February 2024, the Company is in discussions with the Authority regarding the treatment of the remaining upfront payment previously received of $112.5 million, which is reflected in Other current liabilities.

Grants

The Company recognized grant revenue as follows (in thousands):

	Year Ended December 31,
	2023		2022		2021
USG Agreement	$	427,323	$	380,996	$	788,953
U.S. DoD	—		1,925		21,683
CEPI	—		—		135,445
Other grant revenue	—		—		2,628
Total grant revenue	$	427,323	$	382,921	$	948,709

U.S. Government

The Company’s U.S. government agreement consists of a Project Agreement (the “Project Agreement”) and a Base Agreement with Advanced Technology International, 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 Base Agreement together with the Project Agreement the “USG Agreement”).

The original USG Agreement required the Company to conduct certain clinical, regulatory, and other activities, including a pivotal Phase 3 clinical trial to determine the safety and efficacy of prototype vaccine, and to manufacture and deliver to the U.S. government 100 million doses of the vaccine candidate. Funding under the USG Agreement is payable to the Company for various development, clinical trial, manufacturing, regulatory, and other activities. The USG Agreement contains terms and conditions that are customary for U.S. government agreements of this nature, including provisions giving the U.S. government the right to terminate the Base Agreement or the Project Agreement based on a reasonable determination that the funded project will not produce beneficial results commensurate with the expenditure of resources and that termination would

be in the U.S. government’s interest. If the Project Agreement is terminated prior to completion, the Company is entitled to be paid for work performed and costs or obligations incurred prior to termination and consistent with the terms of the USG Agreement. As of December 31, 2023, the Company has recognized the full $1.8 billion funding under the USG Agreement in revenue.

Coalition for Epidemic Preparedness Innovations

In May 2020, the Company entered into a restated funding agreement which was amended in November 2020 with CEPI, under which CEPI agreed to provide funding of up to $399.5 million to the Company to support the development of prototype vaccine. The agreement provided up to $257.0 million in CEPI Grant Funding and up to $142.5 million in CEPI Forgivable Loan Funding, which are loans in the form of one or more forgivable no-interest term loans to fund certain manufacturing activities and are not subject to restrictive or financial covenants. As of December 31, 2023 and 2022, the Company had recognized total revenue related to CEPI of $358.6 million, with the unused amounts primarily related to 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 the Company’s costs of manufacturing such vaccine, not including manufacturing costs funded by CEPI. The timing and amount of any loan repayments is currently uncertain.

Royalties and Other

Royalties and other includes royalty milestone payments, sales-based royalties, and Matrix-M™ adjuvant sales.

During the year ended December 31, 2023, the Company recognized $8.5 million in revenue related to license fees, and $16.5 million in revenue related to a Matrix-M™ adjuvant sales. During the year ended December 31, 2023, the Company did not recognize revenue related to milestone payments.

During the year ended December 31, 2022, the Company recognized $9.0 million in revenue related to sales-based royalties, $20.0 million related to milestone payments, and $15.0 million in revenue related to a Matrix-M™ adjuvant sales.

During the year ended December 31, 2021, the Company recognized $178.6 million in revenue related to sales-based royalties and $20.0 million related to milestone payments.