X0306 4 2018-12-12 0 0001626971 Corvus Pharmaceuticals, Inc. CRVS 0001412679 Buggy Joseph J CORVUS PHARMACEUTICALS, INC. 863 MITTEN ROAD, SUITE 102 BURLINGAME CA 94010 0 1 0 0 EVP Discovery Research Common Stock, $0.0001 par value 84876 D Common Stock, $0.0001 par value 266310 I By Trust Stock Option (Right to Buy) 5.94 2018-12-12 4 A 0 100000 0.00 A 2028-12-12 Common Stock 100000 100000 D A portion of these shares is subject to a right of repurchase held by the Issuer. These shares are held by Buggy / Cooper Living Trust dated June 25, 2014, Joseph J. Buggy / Anne Cooper Trustees (the "Buggy Trust"). Dr. Buggy has shared voting, investment and dispositive power over the shares held by the Buggy Trust. The underlying shares subject to the option vest and become exercisable as to one-forty eighth (1/48th) of the shares subject to the option in successive, equal monthly installments measured from December 12, 2018, subject to Reporting Person's continued service relationship with the Issuer on each such vesting date. /s/ Leiv Lea, as Attorney-in-Fact for Joseph J. Buggy, Ph.D. 2018-12-14