X0407 4 2023-03-29 0 0001746473 PLIANT THERAPEUTICS, INC. PLRX 0001809204 Cummings Keith Lamont C/O PLIANT THERAPEUTICS, INC. 260 LITTLEFIELD AVENUE SOUTH SAN FRANCISCO CA 94080 0 1 0 0 Chief Financial Officer 0 Common Stock 2023-03-29 4 A 0 19375 0.00 A 158430 D On July 28, 2022, the Reporting Person was granted 77,500 performance-vested stock units, the vesting of which are subject to the achievement of various pre-established performance criteria. On March 29, 2023, the Compensation Committee of the Issuer's Board of Directors certified the achievement of an operational performance criteria, resulting in the vesting of 19,375 shares. Includes 631 shares of Common Stock acquired by the Reporting Person pursuant to an Employee Stock Purchase Plan program. /s/ Mike Ouimette, attorney-in-fact 2023-03-31