X0306 4 2021-09-28 0 0001607678 Viking Therapeutics, Inc. VKTX 0001614578 Lian Brian C/O VIKING THERAPEUTICS, INC. 12340 EL CAMINO REAL, SUITE 250 SAN DIEGO CA 92130 1 1 0 0 President & CEO Common Stock, par value $0.00001 per share 2021-09-28 4 A 0 55500 0.00 A 1952557 D Common Stock, par value $0.00001 per share 2021-09-28 4 F 0 27750 6.50 D 1924807 D The reported securities were subject to a performance restricted stock unit award that was granted on January 3, 2020, 33.33% of which vested on September 28, 2021 upon the achievement of a non-financial performance goal. Includes 2,876 shares acquired on May 20, 2021 pursuant to the Issuer's 2014 Employee Stock Purchase Plan. These shares were withheld by the Issuer in order to satisfy certain tax withholding obligations in connection with the issuance of shares upon the vesting of certain shares of common stock subject to a performance restricted stock unit award. /s/ Michael Morneau, as Attorney-in-Fact 2021-09-30