X0306 4 2019-05-12 0 0000072444 Vaxart, Inc. VXRT 0001652203 Latour Wouter 290 UTAH AVE., SUITE 200 SOUTH SAN FRANCISCO CA 94080 1 1 0 0 President and Chief Executive Stock Option (right to buy) 0.77 2019-05-12 4 A 0 363261 0.00 A 2029-05-11 Common Stock 363261 363261 D The option vests over a four-year period, with 25% of the shares subject to the option vesting on the first anniversary of the vesting commencement date of May 10, 2019, and the remaining shares subject to the option vesting in equal monthly installments over the next 36 months. /s/ Wouter W. Latour, M.D. 2019-05-14