X0407 4 2023-04-26 0 0001339970 aTYR PHARMA INC LIFE 0001236447 SCHIMMEL PAUL C/O ATYR PHARMA, INC. 10240 SORRENTO VALLEY ROAD, SUITE 300 SAN DIEGO CA 92121 1 0 0 0 0 Common stock 2023-04-26 4 M 0 6000 A 8890 D Common stock 113023 I See Footnote Common stock 679143 I See Footnote Restricted Stock Unit 2023-04-26 4 M 0 6000 0.00 D Common Stock 6000 0 D Represents shares acquired upon the vesting of restricted stock units (RSUs) granted to the Reporting Person on April 26, 2022. RSUs convert into common stock on a one-for-one basis. These shares are owned directly by Paul Schimmel Prototype PSP, Paul Schimmel Trustee, FBO Paul Schimmel. The Reporting Person is the sole owner of the Paul Schimmel Prototype PSP, Paul Schimmel Trustee, FBO Paul Schimmel. These shares are owned directly by Schimmel Revocable Trust U/A Dtd 9/6/2000. The Reporting Person and his spouse are trustees of the Schimmel Revocable Trust U/A Dtd 9/6/2000. The RSUs fully vested one year from the grant date which was April 26, 2022. /s/ Nancy E. Denyes, attorney-in-fact 2023-04-28