X0407 4 2023-04-10 0 0001435049 CHINOOK THERAPEUTICS, INC. KDNY 0001656998 Azelby Robert C/O CHINOOK THERAPEUTICS, INC. 400 FAIRVIEW AVE. NO., 9TH FLOOR SEATTLE WA 98109 1 0 0 0 0 Stock Option (right to buy) 21.60 2023-04-10 4 A 0 28200 0.00 A 2033-04-09 Common Stock 28200 28200 D Restricted Stock (RSU)(Common Stock) 2023-04-10 4 A 0 7000 0.00 A 2026-04-10 Common Stock 7000 7000 D The stock option fully vests as to 1/36 of the total shares monthly beginning on May 10, 2023 until fully vested, subject to the Reporting Person's provision of service to the Issuer on the vesting date. Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement. The RSUs vests as to one-third (1/3) of the total restricted stock units in equal annual installments beginning on April 10, 2024, 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 2023-04-12