X0508 4/A 2025-05-22 2025-06-04 0001001907 ASTROTECH Corp ASTC 0002071373 Canas Jennifer 2105 DONLEY DR. SUITE 100 AUSTIN TX 78758 1 Chief Financial Officer 0 Employee Stock Options (right to buy) 5.95 2025-05-22 4 A 0 5250 0 A 2035-05-22 Common Stock 5250 5250 D The original Form 4, filed on June 4, 2025, is being amended by this Form 4 amendment to reflect that the grant previously reported was a grant of options instead of an award of shares of restricted stock. The option agreement provides that the option becomes exercisable in three equal annual installments over three years beginning on the first anniversary of the option's grant date. The option was granted on May 22, 2025. /s/ Jennifer Canas 2025-06-05