X0306 4 2021-12-01 0 0001435049 CHINOOK THERAPEUTICS, INC. KDNY 0001197350 BJERKHOLT ERIC C/O CHINOOK THERAPEUTICS, INC. 400 FAIRVIEW AVE. NO., 9TH FLOOR SEATTLE WA 98102 0 1 0 0 Chief Financial Officer Common Stock 2021-12-01 4 M 0 16414 A 26414 D Common Stock 2021-12-01 4 F 0 5750 16.0169 D 20664 D Restricted Stock Units (RSU) 2021-12-01 4 M 0 16414 0.00 D 2031-11-29 Common Stock 16414 32829 D Restricted stock units convert into common stock on a one-for-one basis. Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of Issuer's common stock. The RSUs shall vest as to 33.33% of the total shares on November 30, 2021, and thereafter vests as to 33.33% of the total RSUs on November 30, 2022, and as to 33.33% of the total RSUs on November 30, 2023, subject to the provision of services to the Company on each vesting date. /s/ Kirk Schumacher, Attorney-in-Fact 2021-12-03