X0306 4 2022-04-15 1 0001001907 ASTROTECH Corp ASTC 0001592683 Stober Eric 2105 DONLEY DR. SUITE 100 AUSTIN TX 78758 1 Former CFO Common Stock 2022-04-15 4 D 0 233332 2.02 D 219963 D Comprised of unvested restricted shares forfeited by the Reporting Person in connection with his resignation as the Issuer's Chief Financial Officer. Effective as of April 15, 2022, the Reporting Person resigned as the Issuer's Chief Financial Officer and from all other positions with the Issuer; however, derivative securities granted to the Reporting Person are eligible to be exercised up to 90 days after the date of the Reporting Person's resignation, or July 14, 2022. /s/ Eric Stober 2022-04-18