X0306 4 2021-05-11 0001673772 RAPT Therapeutics, Inc. RAPT 0001635616 Brockstedt Dirk G. C/O RAPT THERAPEUTICS, INC., 561 ECCLES AVENUE SOUTH SAN FRANCISCO CA 94080 false true false false Chief Scientific Officer Common Stock 2021-05-11 4 M false 2648 6.18 A 22460 D Common Stock 2021-05-11 4 S false 2648 18.19 D 19812 D Option (right to buy) 6.18 2021-05-11 4 M false 2648 0 D 2028-03-27 Common Stock 2648 38227 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Reporting Person. Includes 2,084 shares acquired by the reporting person under the Issuer's 2019 Employee Stock Purchase Plan on April 30, 2021. Twenty-five percent of the shares subject to the option vests on the first anniversary of the vesting commencement date, and the remainder vests in 36 equal monthly installments thereafter for the following three years. /s/ Rodney Young, Attorney-in-Fact for Dirk G Brockstedt 2021-05-13