Compass Therapeutics, Inc. (CMPX) ownership: Top institutional holder: TANG CAPITAL MANAGEMENT LLC ($88.82M). Insider activity: Net Seller (1 buys, 4 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| TANG CAPITAL MANAGEMENT LLC | 16790809.00 | $88.82M | 2026-03-31 |
| ORBIMED ADVISORS LLC | 15219994.00 | $80.51M | 2026-03-31 |
| SUVRETTA CAPITAL MANAGEMENT, LLC | 14307379.00 | $75.69M | 2026-03-31 |
| Vivo Capital, LLC | 9545466.00 | $50.50M | 2026-03-31 |
| BlackRock, Inc. | 9506080.00 | $50.29M | 2026-03-31 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 8486500.00 | $44.89M | 2026-03-31 |
| VANGUARD GROUP INC | 8048374.00 | $43.22M | 2025-12-31 |
| ENAVATE SCIENCES GP, LLC | 7788150.00 | $41.20M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-04-29 | |
| Sell | null | 2026-04-29 | |
| Sell | null | 2026-04-29 | |
| Sell | null | 2026-04-29 | |
| Buy | null | 2026-02-08 |
Back to CMPX overview · CMPX earnings · All congressional trades
Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.