Who owns Compass Therapeutics, Inc.?
Institutional ownership of CMPX from SEC Form 13F filings across 154 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
154
13F holders
$177.9M
value, 2026 filers
45.8%
of shares outstanding (82.5M sh)
44
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of CMPX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | MONTANOVA CAPITAL, LLC | 14.1M | $30.9M | 0.6% | 7.8% | -1.4% |
| 2 | BlackRock, Inc. | 11.3M | $24.7M | 0.0% | 6.3% | +18.7% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 6.1M | $13.4M | 0.0% | 3.4% | -49.3% |
| 4 | MILLENNIUM MANAGEMENT LLC | 4.7M | $10.3M | 0.0% | 2.6% | +457.0% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 3.8M | $8.4M | 0.0% | 2.1% | +7.0% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.8M | $8.3M | 0.0% | 2.1% | +248.3% |
| 7 | Qube Research & Technologies Ltd | 3.7M | $8.1M | 0.0% | 2% | +44.6% |
| 8 | Blue Owl Capital Holdings LP | 3.6M | $7.9M | 1.2% | 2% | +23.2% |
| 9 | CITADEL ADVISORS LLC | 3.6M | $7.8M | 0.0% | 2% | +395.0% |
| 10 | GOLDMAN SACHS GROUP INC | 3.5M | $7.7M | 0.0% | 2% | +77.0% |
| 11 | Fisher Asset Management, LLC | 1.4M | $3.0M | 0.0% | 0.8% | +3.2% |
| 12 | FMR LLC | 1.2M | $2.7M | 0.0% | 0.7% | -32.7% |
| 13 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.2M | $2.6M | 0.0% | 0.7% | -86.0% |
| 14 | ACADIAN ASSET MANAGEMENT LLCNEW | 1.2M | $2,537 | 0.0% | 0.6% | new |
| 15 | NORTHERN TRUST CORP | 1.1M | $2.5M | 0.0% | 0.6% | +8.8% |
| 16 | Nuveen, LLC | 1.0M | $2.2M | 0.0% | 0.6% | +247.3% |
| 17 | Squarepoint Ops LLC | 1.0M | $2.2M | 0.0% | 0.6% | +1906.9% |
| 18 | VANGUARD FIDUCIARY TRUST CO | 1.0M | $2.2M | 0.0% | 0.6% | +0.3% |
| 19 | Blackstone Inc. | 899,936 | $2.0M | 0.0% | 0.5% | -51.6% |
| 20 | FIRST TRUST ADVISORS LPNEW | 807,004 | $1.8M | 0.0% | 0.4% | new |
| 21 | JPMORGAN CHASE & CO | 789,399 | $1.7M | 0.0% | 0.4% | -6.9% |
| 22 | MORGAN STANLEY | 735,186 | $1.6M | 0.0% | 0.4% | +104.0% |
| 23 | CITIGROUP INC | 713,907 | $1.6M | 0.0% | 0.4% | +19.3% |
| 24 | UBS Group AG | 712,763 | $1.6M | 0.0% | 0.4% | -70.2% |
| 25 | Burkehill Global Management, LP | 700,000 | $1.5M | 0.1% | 0.4% | 0.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.