MPM BioImpact LLC - 30 Jun 2025 SCHEDULE 13G/A Report for Compass Therapeutics, Inc. Common Stock, par value $0.001 per share (CMPX)

Filing Manager: MPM BioImpact LLC
Reporting Manager: MPM BioImpact LLC
Security: Compass Therapeutics, Inc. Common Stock, par value $0.001 per share
Symbol: CMPX
Shares outstanding: 137M shares
Disclosed Ownership: 5.62M shares
Ownership: 4.1%
Form type: SCHEDULE 13G/A
Filing time: 12 Aug 2025, 16:29:56 UTC
Date of event: 30 Jun 2025
Previous filing: 14 Feb 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
MPM BioImpact LLC	4.1%	5.62M	5.62M	0	/s/ Christopher Wolf	Chief Financial Officer