J.P. Morgan Securities LLC

383 Madison Avenue

New York, NY 10179

Cowen and Company, LLC

599 Lexington Avenue

New York, NY 10022

SVB Leerink LLC

One Federal Street, 37^th Floor

Boston, MA 02110

Guggenheim Securities, LLC

330 Madison Avenue

New York, NY 10017

July 6, 2020

VIA EDGAR

U.S. Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N.E.

Washington, D.C. 20549

Ladies and Gentlemen:

In accordance with Rule 461 under the Securities Act of 1933, as amended (the “Act”), we, as representatives of the several underwriters, hereby join in the request of Revolution Medicines, Inc. (the “Company”) for acceleration of the effective date of the above-named Registration Statement so that it becomes effective at 4:30 PM, Eastern Time, on July 8, 2020, or as soon thereafter as practicable, or at such other time thereafter as the Company or its outside counsel, Latham & Watkins LLP, may request by telephone that such Registration Statement be declared effective.

Pursuant to Rule 460 under the Act, we, as representatives of the several underwriters, wish to advise you that there will be distributed to each Underwriter or dealer, who is reasonably anticipated to participate in the distribution of the security, as many copies of the proposed form of preliminary prospectus as appears to be reasonable to secure adequate distribution of the preliminary prospectus.

The undersigned advise that they have complied and will continue to comply, and each underwriter has advised the undersigned that it has complied and will continue to comply, with the requirements of Rule 15c2-8 under the Securities Exchange Act of 1934, as amended.

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