Compass Therapeutics, Inc. - CMPX

Ownership (Schedule 13D / 13G) · latest 50 filings · Back to all files
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Filed Form Reporting person Percent Shares SEC
May 15, 2026 SCHEDULE 13G/A BIOTECHNOLOGY VALUE FUND L P 2.3% 4,142,020 View
May 15, 2026 SCHEDULE 13G/A BVF I GP LLC 2.3% 4,142,020 View
May 15, 2026 SCHEDULE 13G/A BIOTECHNOLOGY VALUE FUND II LP 1.7% 3,028,951 View
May 15, 2026 SCHEDULE 13G/A BVF II GP LLC 1.7% 3,028,951 View
May 15, 2026 SCHEDULE 13G/A Biotechnology Value Trading Fund OS LP 0.3% 476,311 View
May 15, 2026 SCHEDULE 13G/A BVF Partners OS Ltd. 0.3% 476,311 View
May 15, 2026 SCHEDULE 13G/A BVF GP HOLDINGS LLC 4.0% 7,170,971 View
May 15, 2026 SCHEDULE 13G/A BVF PARTNERS L P/IL 4.3% 7,764,842 View
May 15, 2026 SCHEDULE 13G/A BVF INC/IL 4.3% 7,764,842 View
May 15, 2026 SCHEDULE 13G/A LAMPERT MARK N 4.3% 7,764,842 View
Feb 13, 2026 SCHEDULE 13G/A Blackstone Annex Master Fund L.P. 1.4% 2,447,820 View
Feb 13, 2026 SCHEDULE 13G/A Spruce Street Aggregator L.P. 2.1% 3,678,362 View
Feb 13, 2026 SCHEDULE 13G/A Blackstone Alternative Asset Management Associates LLC 3.4% 6,126,182 View
Feb 13, 2026 SCHEDULE 13G/A Blackstone Holdings II L.P. 3.4% 6,126,182 View
Feb 13, 2026 SCHEDULE 13G/A Blackstone Holdings I/II GP L.L.C. 3.4% 6,126,182 View
Feb 13, 2026 SCHEDULE 13G/A Blackstone Inc. 3.4% 6,126,182 View
Feb 13, 2026 SCHEDULE 13G/A Blackstone Group Management L.L.C. 3.4% 6,126,182 View
Feb 13, 2026 SCHEDULE 13G/A Stephen A. Schwarzman 3.4% 6,126,182 View
Jan 21, 2026 SCHEDULE 13G BlackRock, Inc. 5.2% 9,271,644 View
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G. Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F). Amendments (/A) can repeat the same holder over time, so rows should not be summed. Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.