Vaxart Inc

You should consider the risks and uncertainties described under Item 1A of Part I of our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, which we filed with the Securities and Exchange Commission on March 20, 2025, together with all other information contained or incorporated by reference in this Quarterly Report on Form 10-Q, when evaluating our business and our prospects. There are no material changes to the risk factors set forth in Part I, Item 1A, in our Annual Report on Form 10-K for the year ended December 31, 2024, except as described below.

A significant portion of the funding to further develop our COVID-19 vaccine candidate is currently expected to come from HHS BARDA funds. If HHS BARDA were to eliminate, reduce, delay, or object to funding available to us under the 2024 ATI-RRPV Contract, this could have a significant, negative impact on our revenues and cash flows, and we may be forced to suspend or terminate the continued development of the product candidate or obtain alternative sources of funding.

In June 2024, we entered into the 2024 ATI-RRPV Contract with ATI, the Rapid Response Partnership Vehicle’s Consortium Management Firm funded by HHS BARDA. The 2024 ATI-RRPV Contract, as modified and amended to date, provides for a funding ceiling of approximately $460.7 million. In February 2025, we entered into Modification No. 5 to the 2024 ATI-RRPV Contract. Modification No. 5 increased the total amount of funding available for payment to approximately $240.1 million.

We anticipate that a significant portion of the funding to further develop our COVID-19 vaccine candidate will come from the remaining amounts to be received under the 2024 ATI-RRPV Contract. The 2024 ATI-RRPV Contract provides that the government has the right to determine whether to fund the continued performance of the study after the initial funding. In February 2025, we received written notification directing the Company to stop work on the 2024 ATI-RRPV Contract, with the exception that we could continue effort associated with the per protocol follow-up for the 400-person cohort. The stop work order was in effect for a period of 90 days and, that within a period of 90 days, ATI, as directed by the U.S. Government, will either cancel the stop work order, extend the stop work, or terminate the work covered by the 2024 ATI-RRPV Contract. Subsequently, in April 2025, the Company received written notification from ATI in the form of the Lift Notice that the stop work order had been lifted and that the Company may resume incurring costs, participating in meetings, and communicating with the Government and ATI concerning the project award. The Lift Notice required further discussion between the Company and HHS BARDA regarding costs, timelines, and regulatory pathway agreement. The Company intends to continue discussions with HHS BARDA regarding the plan for dosing participants. The Company has not yet received approval to commence dosing.

The stop work order had the effect of reducing the Company's revenues but also lowering its expenses during the relevant time period. Even if we were to continue receiving funds under the 2024 ATI-RRPV Contract or were approved to commence dosing, the terms of the grant may unfavorably change or the amount of funding may decrease. If the 2024 ATI-RRPV Contract is terminated or further suspended, or if there is any government decision not to continue funding or reduction or further delay in funding under the 2024 ATI-RRPV Contract, our revenues and cash flows would be significantly and negatively impacted and we may be forced to seek alternative sources of funding, which may not be available on non-dilutive terms, terms favorable to us, or at all.