X0508 4 2023-12-08 0000072444 Vaxart, Inc. VXRT 0001959565 Lee Phillip E C/O VAXART, INC. 170 HARBOR WAY, SUITE 300 SOUTH SAN FRANCISCO CA 94080 1 Chief Financial Officer 0 Common Stock 2023-12-08 4 F 0 35151 0.71 D 157751 D Common Stock 2023-12-15 4 F 0 5943 0.63 D 151808 D Common Stock 2024-03-18 4 A 0 90000 0 A 241808 D Stock Option (right to buy) 1.16 2024-03-18 4 A 0 410000 0 A 2034-03-17 Common Stock 410000 410000 D This transaction is being reported late due to administrative oversight. Represents shares that have been withheld by the Issuer to satisfy its income tax and withholding and remittance obligations in connection with the net settlement of RSUs vested as of December 8, 2023. Represents shares that have been withheld by the Issuer to satisfy its income tax and withholding and remittance obligations in connection with the net settlement of RSUs vested as of December 15, 2023. Grant of shares upon vesting of restricted stock units. Twenty five percent of the shares underlying the award shall vest on each anniversary of the vesting commencement date of March 18, 2024, so that the restricted stock units would be fully vested on the fourth anniversary of the vesting commencement date. The shares subject to this stock option shall vest as to 25% of the shares underlying the grant on March 18, 2025, the first anniversary of the date that vesting commenced, and thereafter in 36 equal monthly installments such that the stock option shall be fully vested on March 18, 2028. /s/ Edward Berg, Attorney-in-Fact 2024-03-20