X0306 4 2020-11-10 0 0001435049 CHINOOK THERAPEUTICS, INC. KDNY 0001202785 DOBMEIER ERIC C/O CHINOOK THERAPEUTICS, INC. 1600 FAIRVIEW AVE. E. SEATTLE WA 98102 1 1 0 0 President, CEO Common Stock 2020-11-10 4 P 0 2000 13.86 A 48337 D Common Stock 2020-11-11 4 P 0 2500 13.75 A 50837 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.75 to $14.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth herein. Certain of the shares are subject to forfeiture to the Issuer if underlying vesting conditions are not met. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.65 to $13.85, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth herein. /s/ Kirk Schumacher, Attorney-in-Fact 2020-11-13