X0306 4 2021-05-18 0 0001339970 aTYR PHARMA INC LIFE 0001236447 SCHIMMEL PAUL 3545 JOHN HOPKINS COURT, SUITE #250 SAN DIEGO CA 92121 1 0 0 0 Common Stock 2890 D Common Stock 429143 I See Footnote Common Stock 2021-05-18 4 P 0 50000 3.98 A 113023 I See Footnote 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. Represents weighted average price for the shares. The shares were purchased at prices ranging from $3.95 to $4.00 per share. The reporting person will provide to the Securities and Exchange Commission staff, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares purchased at each separate price. 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. Nancy Denyes, Attorney-in-Fact 2021-05-20