X0306 4 2021-11-17 0 0001439725 BIODESIX INC BDSX 0001827690 Cowie Robin Harper 2970 WILDERNESS PLACE SUITE 100 BOULDER CO 80301 0 1 0 0 CFO, Sec'y & Treasurer Common Stock 2021-11-17 4 P 0 1000 6.51 A 41975 D The price reported in Column 4 is a weighted average price. These shares of Common Stock were purchased in multiple transactions at prices ranging from $6.41 to $6.61, inclusive. The Reporting Persons undertake 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 range set forth herein. Includes 1,262 shares acquired under the BDSX stock purchase plan on August 31, 2021. /s/ Robin Harper Cowie 2021-11-18