X0609 4 2026-10-01 0001339970 aTYR PHARMA INC ATYR 0002156611 Yaras Brandon false 10240 SORRENTO VALLEY ROAD SUITE 300 SAN DIEGO CA 92121 false true false false Chief Financial Officer false Employee Stock Option (right to buy) 0.30 2026-10-01 4 A false 410000 0 A 2036-10-01 Common Stock 410000 410000 D The shares subject to this option shall vest and become exercisable in 48 equal monthly installments beginning November 1, 2026, such that this option will be fully exercisable on November 1, 2030. This option is subject to accelerated vesting upon termination without cause upon change of control of the issuer. /s/ Brandon Yaras 2026-10-01