Compass Therapeutics Inc.
Ownership
Ownership Structure
Who owns Compass Therapeutics Inc. (CMPX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 73.5% of the shares are freely tradable; institutional investors hold 94.2%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| TANG CAPITAL MANAGEMENT LLC | 9.32 | 16,790,809 | +0.0 | 03/31/2026 |
| Orbimed Advisors LLC | 8.45 | 15,219,994 | +0.0 | 03/31/2026 |
| Suvretta Capital Management, LLC | 7.94 | 14,307,379 | +0.9 | 03/31/2026 |
| BlackRock Inc | 5.28 | 9,506,080 | +1.3 | 03/31/2026 |
| Enavate Sciences GP, LLC | 4.32 | 7,788,150 | +0.0 | 06/30/2026 |
| Bvf Inc | 4.31 | 7,764,842 | +0.0 | 03/31/2026 |
| Vivo Capital, LLC | 4.31 | 7,757,060 | -18.7 | 06/30/2026 |
| State Street Corp | 3.72 | 6,694,976 | +36.9 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.35 | 6,037,175 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| State Street® SPDR® S&P® Biotech ETF | 4.01 | 7,218,361 | -1.1 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.