X0306 4 2020-10-05 0 0001435049 ADURO BIOTECH, INC. KDNY 0001823197 Glicklich Alan C/O CHINOOK THERAPEUTICS, INC. 1600 FAIRVIEW AVE. E. SEATTLE WA 98102 0 1 0 0 Chief Medical Officer Stock Option (right to buy) 0.42 2020-10-05 4 A 0 242662 A 2030-04-21 Common Stock 242662 242662 D Stock Option (right to buy) 14.77 2020-10-06 4 A 0 62660 0.00 A 2030-10-05 Common Stock 62660 62660 D Restricted Stock Units (RSU) (Common Stock) 2020-10-06 4 A 0 21311 0.00 A 2030-10-05 Common Stock 21311 21311 D The stock option vests as to 25% of the total shares on April 20, 2021, and thereafter vests as to 1/48 of the total shares monthly until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date. Received in connection with the merger of Private Chinook into the Issuer in exchange for a stock option to acquire 830,500 shares of Private Chinook common stock for $0.12 per share. The stock option vests as to 25% of the total shares on October 6, 2021, and thereafter vests as to 1/36 of the total shares monthly until fully vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date. Each restricted stock unit represents a contingent right to receive one share of Issuer's common stock. The RSUs vests as to one-third (1/3) of the total restricted stock units in equal annual installments beginning on October 6, 2021, until fully vested subject to the reporting person's provision of service to the Issuer on each vesting date. /s/ Kirk Schumacher, Attorney-in-Fact 2020-10-07