X0206 3 2018-03-14 0 0001724521 Arcus Biosciences, Inc. RCUS 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 0 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 0 0001182464 GOEDDEL DAVID V 1700 OWENS STREET, SUITE 500 SAN FRANCISCO CA 94158 0 0 1 0 0001614186 Kutzkey Tim 1700 OWENS STREET, SUITE 500 SAN FRANCISCO CA 94158 0 0 1 0 0001606074 Svennilson Peter 1700 OWENS STREET, SUITE 500 SAN FRANCISCO CA 94158 0 0 1 0 Series A Preferred Stock Common Stock 1767676 D Series B Preferred Stock Common Stock 875087 D Series C Preferred Stock Common Stock 427660 D Series C Preferred Stock Common Stock 470427 D The reported securities are convertible at any time, on a one-for-one basis, in whole or in part, at the option of the holder, have no expiration date, and will convert into shares of common stock immediately prior to the closing of the Issuer's initial public offering. The securities are directly held by The Column Group II, LP ("TCG II") and indirectly held by The Column Group II GP, LP ("TCG II GP") the general partner of TCG II. TCG II GP has voting and dispositive power with respect to these shares. The individual managing partners of TCG II GP are Peter Svennilson and David Goeddel, who may be deemed to have shared voting, investment and dispositive power with respect to these shares. Each individual managing partner disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest in such shares. 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. Ponoi LLC has voting and dispositive power with respect to these shares. The individual managing partners of Ponoi LLC are Peter Svennilson, David Goeddel and Tim Kutzkey, who may be deemed to have shared voting, investment and dispositive power with respect to these shares. Each individual managing partner disclaims beneficial ownership of these shares, except to the extent of his pecuniary interest in such shares. /s/ Jennifer J. Carlson, Attorney-in-Fact 2018-03-14