X0306 4 2020-11-19 0001673772 RAPT Therapeutics, Inc. RAPT 0001182471 RIEFLIN WILLIAM JL C/O RAPT THERAPEUTICS, INC., 561 ECCLES AVENUE SOUTH SAN FRANCISCO CA 94080 true false false false Common Stock 2020-11-19 4 P false 10000 16.22 A 18000 D Common Stock 76722 I By Rieflin Family Trust u/a dtd 4/3/00, William J. Rieflin and Prudence H. Rieflin, Trustees The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $15.90 to $16.49, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range. The shares are held directly by Rieflin Family Trust u/a dtd 4/3/00, William J. Rieflin and Prudence H. Rieflin, Trustees, for which the Reporting Person is co-Trustee. /s/ Karen C. Lam, Attorney-in-Fact for William Rieflin 2020-11-20