X0306 4 2022-02-18 0 0001738021 Compass Therapeutics, Inc. CMPX 0001814202 Ferneau Philip C/O COMPASS THERAPEUTICS, INC. 80 GUEST STREET, SUITE 601 BOSTON MA 02135 1 0 0 0 Stock Option (Right to Buy) 2.40 2022-02-18 4 A 0 30000 0.00 A 2032-02-17 Common Stock 30000 30000 D This option vests in substantially equal monthly installments over four years. The Reporting Person is a managing partner of Borealis Ventures. Pursuant to an agreement with Borealis Ventures, the Reporting Person is obligated to transfer any securities issued under any stock options or other awards, or the economic benefit thereof, to Borealis Granite Fund, L.P. and Vox Health Fund, L.P. Exhibit 24 - Power of Attorney /s/ Vered Bisker-Leib, attorney-in-fact 2022-02-23