X0508 4/A 2023-03-28 2024-03-20 0000072444 Vaxart, Inc. VXRT 0001652204 Tucker Sean C/O VAXART, INC. 170 HARBOR WAY, SUITE 300 SOUTH SAN FRANCISCO CA 94080 1 SVP, Chief Scientific Officer 0 Common Stock 359597 D Common Stock 51465 I By joint tenancy with Frances Chang and Sean Tucker Common Stock 9060 I By Spouse This amendment to the Form 4 filed on March 20, 2024, is being filed to correct an administrative error in Column 5 of Table 1, which previously included in the amount of securities beneficially owned directly by the reporting person the amount of securities indirectly, beneficially owned by the reporting person through his spouse and with Frances Chang by joint tenancy. /s/ Edward Berg, Attorney-in-Fact 2024-04-01