X0306 4 2020-06-18 0 0001673772 RAPT Therapeutics, Inc. RAPT 0001261974 GRAY MARY ANN C/O RAPT THERAPEUTICS, INC. 561 ECCLES AVENUE SOUTH SAN FRANCISCO CA 94080 1 0 0 0 Stock Option (right to buy) 28.27 2020-06-18 4 A 0 7500 0.00 A 2030-06-17 Common Stock 7500 7500 D The Option shall vest on the earlier of (i) June 18, 2021, or (ii) one day prior to the date of the Issuer's next annual meeting of stockholders to be held in 2021, subject to the Reporting Person's continuous service through each applicable vesting date. /s/ Karen C. Lam, Attorney-in-Fact for Mary Ann Gray, Ph.D. 2020-06-19