Vaxart, Inc.

Participant Information

The Company, each of its directors (Steven Lo (President, Chief Executive Officer and Principal Executive Officer, and Director), Kevin P. Finney, Elaine J. Heron, Ph.D., W. Mark Watson, David Wheadon, M.D., and James B. Breitmeyer, M.D., Ph.D.) and four of its executive officers and employees in addition to Mr. Lo (Jeroen Grasman (Chief Financial Officer, Principal Financial Officer, and Principal Accounting Officer), Sean Tucker, Ph.D. (Senior Vice President and Chief Scientific Officer), Edward B. Berg (Senior Vice President and General Counsel), James Cummings, M.D. (Chief Medical Officer)) are deemed to be “participants” (as defined in Schedule 14A under the Securities Exchange Act of 1934, as amended) in the solicitation of proxies from the Company’s stockholders in connection with matters to be considered at the Annual Meeting. Information about the names of the Company’s directors and officers, their respective interests in the Company by security holdings or otherwise, and their respective compensation is set forth in the sections entitled “Executive Officers,” “Election of Directors,” “Executive Compensation,” “Director Compensation,” and “Security Ownership of Certain Beneficial Owners and Management” in the Company’s Amendment No. 1 to the Annual Report on Form 10-K, filed with the SEC on April 30, 2026 (available here). Supplemental information regarding the participants’ holdings of the Company’s securities can be found in the Statement of Change in Ownership on Form 4 filed with the SEC on May 1, 2026 with respect to Dr. Breitmeyer, available here through the SEC’s website and the Company’s investor relations website.