X0306 4 2019-01-28 0 0001626971 Corvus Pharmaceuticals, Inc. CRVS 0001765484 Mobasher Mehrdad CORVUS PHARMACEUTICALS, INC. 863 MITTEN ROAD, SUITE 102 BURLINGAME CA 94010 0 1 0 0 Chief Medical Officer Stock Option (Right to Buy) 3.88 2019-01-28 4 A 0 210000 0.00 A 2029-01-28 Common Stock 210000 210000 D The underlying shares subject to the option vest and become exercisable as to twenty-five percent (25%) of the shares subject to the option on January 28, 2020, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to Reporting Person's continued service relationship with the Issuer on each such vesting date. /s/ Leiv Lea, as Attorney-in-Fact for Mehrdad Mobasher 2019-01-30