X0306 4 2020-06-18 0 0001673772 RAPT Therapeutics, Inc. RAPT 0001600420 COLUMN GROUP II, LP 1700 OWENS STREET SUITE 500 SAN FRANCISCO CA 94158 0 0 1 0 0001645333 Column Group II GP, LP 1700 OWENS STREET SUITE 500 SAN FRANCISCO CA 94158 0 0 1 1 General Partner 0001707230 PONOI CAPITAL, LP 1700 OWENS STREET SUITE 500 SAN FRANCISCO CA 94158 0 0 1 0 0001720702 Ponoi Management, LLC 1700 OWENS STREET SUITE 500 SAN FRANCISCO CA 94158 0 0 1 1 General Partner 0001732601 Ponoi Capital II, LP 1700 OWENS STREET SUITE 500 SAN FRANCISCO CA 94158 0 0 1 0 0001746488 Ponoi II Management, LLC 1700 OWENS STREET SUITE 500 SAN FRANCISCO CA 94158 0 0 1 1 General Partner 0001614186 Kutzkey Tim 1700 OWENS STREET SUITE 500 SAN FRANCISCO CA 94158 0 0 1 1 Managing Partner 0001182464 GOEDDEL DAVID V 1700 OWENS STREET SUITE 500 SAN FRANCISCO CA 94158 0 0 1 1 Managing Partner Stock Option (Right to Buy) 28.27 2020-06-18 4 J 0 22500 0.00 A 2030-06-17 Common Stock 22500 22500 I See Footnote The option shall vest in a series of three successive equal annual installments over the three-year period measured from the date of grant, subject to the continuous service of Peter Svennilson as a director of the Issuer through each applicable vesting date. The option was granted to Peter Svennilson, a director of the Issuer who is a managing partner of The Column Group II GP, LP ("TCG II GP"), Ponoi Management, LLC ("Ponoi LLC") and Ponoi II Management, LLC ("Ponoi II LLC"), which are the general partners of The Column Group II, LP ("TCG II LP"), Ponoi Capital, LP ("Ponoi LP") and Ponoi Capital II, LP ("Ponoi II LP," and, together with TCG II LP and Ponoi LP, the "Funds"), respectively. The managing partners of TCG II GP are David Goeddel and Peter Svennilson. The managing partners of Ponoi LLC and Ponoi II LLC are David Goeddel, Peter Svennilson and Tim Kutzkey. Under the partnership agreements of the Funds, Mr. Svennilson is deemed to hold the option for the economic benefit of the Funds. The reporting persons may be deemed indirect beneficial owners of the option. The reporting persons disclaim beneficial ownership of the option except to the extent of their pecuniary interest therein. /s/ Jennifer J. Carlson, Attorney-in-fact 2020-06-22