X0306 4 2018-06-21 0 0001626971 Corvus Pharmaceuticals, Inc. CRVS 0001336504 CLARK IAN T C/O CORVUS PHARMACEUTICALS, INC. 863 MITTEN ROAD, SUITE 102 BURLINGAME CA 94010 1 0 0 0 Stock Option (Right to Buy) 12.50 2018-06-21 4 A 0 15000 0.00 A 2028-06-21 Common Stock 15000 15000 D The underlying shares subject to the option vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of (i) the first anniversary of the grant date or (ii) the date of the 2019 Annual Meeting of the Issuer's stockholders, assuming continuous service as a director until such vesting date. /s/ Leiv Lea, as Attorney-in-Fact for Ian T. Clark 2018-06-25