X0306 4 2020-07-01 0 0001439725 BIODESIX INC BDSX 0001134554 MASSARANY HANY 2970 WILDERNESS PLACE, SUITE 100 BOULDER CO 80301 1 0 0 0 Common Stock 2020-10-30 4 P 0 7500 18.00 A 7500 D Stock Options (Right to buy) 6.83 2020-07-01 4 A 0 35158 0.00 A 2030-06-30 Common Stock 35158 35158 D Restricted Stock Units 6.83 2020-07-01 4 A 0 26368 0.00 A 2030-06-30 Common Stock 26368 26368 D This transaction occurred prior to the Issuer's initial public offering and is being reported on Form 4 solely for purposes of compliance with Rule 16a-2(a) under the Securities Exchange Act of 1934, as amended. The securities covered by such transaction were previously included on the Reporting Person's Form 3. This option vests in 12 successive, equal monthly installments measured from July 1, 2020. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Issuer Common Stock ("Common Stock"). These RSUs vest 40% on July 1, 2022, and the remaining 60% in 36 successive, equal monthly installments measured from July 1, 2022. /s/ Robin H. Cowie as Attorney-in-Fact for Hany Massarany 2020-11-03