Who owns Compass Therapeutics, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of CMPX from SEC Form 13F filings across 214 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.
As of the 2026-06-30 reporting period, 214 institutions disclosed 165.7M shares of Compass Therapeutics, Inc. worth $363.3M — about 88.7% of shares outstanding; the largest disclosed holder is TANG CAPITAL MANAGEMENT LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
214
13F holders
$363.3M
value, 2026 filers
88.7%
of shares outstanding (165.7M sh)
63
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 | TANG CAPITAL MANAGEMENT LLC | 18.0M | $39.4M | 1.8% | 9.6% | +7.1% |
| 2 | ORBIMED ADVISORS LLC | 15.2M | $33.3M | 0.6% | 8.1% | 0.0% |
| 3 | MONTANOVA CAPITAL, LLC | 14.1M | $30.9M | 0.6% | 7.5% | -1.4% |
| 4 | BlackRock, Inc. | 11.3M | $24.7M | 0.0% | 6% | +18.7% |
| 5 | STATE STREET CORP | 10.0M | $21.8M | 0.0% | 5.3% | +48.7% |
| 6 | ENAVATE SCIENCES GP, LLC | 7.8M | $17.1M | 4.9% | 4.2% | 0.0% |
| 7 | Vivo Capital, LLC | 7.8M | $17.0M | 1.6% | 4.2% | -18.7% |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 6.1M | $13.4M | 0.0% | 3.3% | +1.4% |
| 9 | Palo Alto Investors LP | 5.8M | $12.8M | 1.8% | 3.1% | +285.1% |
| 10 | MILLENNIUM MANAGEMENT LLC | 4.7M | $10.3M | 0.0% | 2.5% | +457.0% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 3.8M | $8.4M | 0.0% | 2% | +7.0% |
| 12 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.8M | $8.3M | 0.0% | 2% | +248.3% |
| 13 | Qube Research & Technologies Ltd | 3.7M | $8.1M | 0.0% | 2% | +44.6% |
| 14 | Blue Owl Capital Holdings LP | 3.6M | $7.9M | 1.2% | 1.9% | +23.2% |
| 15 | CITADEL ADVISORS LLC | 3.6M | $7.8M | 0.0% | 1.9% | +395.0% |
| 16 | GOLDMAN SACHS GROUP INC | 3.5M | $7.7M | 0.0% | 1.9% | +77.0% |
| 17 | Rock Springs Capital Management LP | 3.5M | $7.7M | 0.4% | 1.9% | +6.6% |
| 18 | AQR CAPITAL MANAGEMENT LLC | 3.5M | $7.7M | 0.0% | 1.9% | +1650.8% |
| 19 | Birchview Capital, LP | 1.7M | $3.7M | 1.7% | 0.9% | +14.3% |
| 20 | KINGDON CAPITAL MANAGEMENT, L.L.C.NEW | 1.4M | $3.1M | 0.3% | 0.7% | new |
| 21 | Fisher Asset Management, LLC | 1.4M | $3.0M | 0.0% | 0.7% | +3.2% |
| 22 | ROYCE & ASSOCIATES LP | 1.3M | $2.9M | 0.0% | 0.7% | -17.5% |
| 23 | FMR LLC | 1.2M | $2.7M | 0.0% | 0.6% | -32.7% |
| 24 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.2M | $2.6M | 0.0% | 0.6% | -86.0% |
| 25 | ACADIAN ASSET MANAGEMENT LLCNEW | 1.2M | $2.5M | 0.0% | 0.6% | new |
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.