Sec Form 4 Filing - COLUMN GROUP II, LP @ RAPT Therapeutics, Inc. - 2020-09-22

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person COLUMN GROUP II, LP 2. Issuer Name and Ticker or Trading Symbol RAPT Therapeutics, Inc. [ RAPT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1700 OWENS STREET, SUITE 500 3. Date of Earliest Transaction (MM/DD/YY) 09/22/2020 (Street) SAN FRANCISCO, CA94158 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 09/22/2020 S 608,000 D $ 30.85 3,835,679 D ( 1 ) Common Stock 1,599,417 D ( 2 ) Common Stock 145,401 D ( 3 ) Common Stock 50,000 D ( 4 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other COLUMN GROUP II, LP 1700 OWENS STREET SUITE 500 SAN FRANCISCO, CA94158 X Column Group II GP, LP 1700 OWENS STREET SUITE 500 SAN FRANCISCO, CA94158 X General Partner PONOI CAPITAL, LP 1700 OWENS STREET SUITE 500 SAN FRANCISCO, CA94158 X Ponoi Management, LLC 1700 OWENS STREET SUITE 500 SAN FRANCISCO, CA94158 X General Partner Ponoi Capital II, LP 1700 OWENS STREET SUITE 500 SAN FRANCISCO, CA94158 X Ponoi II Management, LLC 1700 OWENS STREET SUITE 500 SAN FRANCISCO, CA94158 X General Partner Column Group II Management, LP 1700 OWENS STREET, SUITE 500 SAN FRANCISCO, CA94158 X Kutzkey Tim 1700 OWENS STREET SUITE 500 SAN FRANCISCO, CA94158 X Managing Partner GOEDDEL DAVID V 1700 OWENS STREET SUITE 500 SAN FRANCISCO, CA94158 X Managing Partner Signatures /s/ Jennifer J. Carlson, Attorney-in-fact 09/23/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The securities are directly held by The Column Group II, LP ("TCG II LP"), and indirectly held by The Column Group II GP, LP ("TCG II GP"), the general partner of TCG II LP. The managing partners of TCG II GP are David Goeddel and Peter Svennilson. The managing partners of TCG II GP may be deemed to have voting and investment power with respect to such shares. TCG II GP and each individual managing partner disclaims beneficial ownership of these shares, except to the extent of their respective pecuniary interest in such shares. ( 2 )The securities are directly held by Ponoi Capital, LP ("Ponoi LP"), and indirectly held by Ponoi Management, LLC ("Ponoi LLC"), the general partner of Ponoi LP. The managing partners of Ponoi LLC are David Goeddel, Peter Svennilson and Tim Kutzkey. The managing partners of Ponoi LLC may be deemed to have voting and investment power with respect to such shares. Each individual managing partner disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest in such shares. ( 3 )The securities are directly held by Ponoi Capital II, LP ("Ponoi II LP"), and indirectly held by Ponoi II Management, LLC ("Ponoi II LLC"), the general partner of Ponoi II LP. The managing partners of Ponoi II LLC are David Goeddel, Peter Svennilson and Tim Kutzkey. The managing partners of Ponoi II LLC may be deemed to have voting and investment power with respect to such shares. Each individual managing partner disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest in such shares. ( 4 )The securities are directly held by The Column Group II Management, LP ("TCGM II LP"). Under the partnership agreement of TCG II LP, TCGM II LP is deemed to hold the securities for the economic benefit of TCG II LP. TCG II LP may be deemed to have an indirect pecuniary interest in the securities. The managing partners of TCGM II LP are David Goeddel and Peter Svennilson. The managing partners of TCGM II LP may be deemed to have voting and investment power with respect to such securities. TCGM II LP, TCG II LP and each individual managing partner disclaims beneficial ownership of these securities, except to the extent of their pecuniary interest therein.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

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