0001738021 2026-04-27 2026-04-27 false 0001738021 8-K 2026-04-27 Compass Therapeutics, Inc. DE 001-39696 82-4876496 80 Guest Street, Suite 601 Boston MA 02135 617 500-8099 false false false false Common Stock, $0.0001 par value per share CMPX NASDAQ false