🕵️ Compass Therapeutics, Inc. ($CMPX)
SEC insider & ownership activity, last 12 months · CIK 1738021 · every row links its SEC filing
Over the last 12 months insiders bought $76K with no open-market selling against it. Anderman Jonathan bought $47K in discretionary trades (Apr). Orbimed Advisors LLC trimmed 11.0% → 8.9%; Orbimed Capital GP V LLC trimmed 11.0% → 8.9%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $76K (2 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Anderman Jonathan | 1 | $47K | 0 | – | Apr 29, 2026 |
| Lerner Neil | 1 | $28K | 0 | – | Apr 29, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| TANG Capital Management, LLC | 10.0% | 13G | Nov 14, 2025 | filing ↗ | |
| Kevin Tang | 10.0% | 13G | Nov 14, 2025 | filing ↗ | |
| Orbimed Advisors LLC | 8.9% | 13D | Aug 13, 2025 | filing ↗ | |
| Orbimed Capital GP V LLC | 8.9% | 13D | Aug 13, 2025 | filing ↗ | |
| Suvretta Capital Management, LLC | 8.2% | 13G | Aug 21, 2025 | filing ↗ | |
| Aaron Cowen | 8.2% | 13G | Aug 21, 2025 | filing ↗ | |
| Averill Master Fund, Ltd. | 7.1% | 13G | Aug 21, 2025 | filing ↗ | |
| TANG Capital Partners, LP | 6.0% | 13G | Nov 14, 2025 | filing ↗ | |
| Blackrock, Inc. | 5.2% | 13G | Jan 21, 2026 | filing ↗ | |
| VIVO Opportunity Fund Holdings, L.P. | 5.1% | 13G | Nov 14, 2025 | filing ↗ | |
| VIVO Opportunity, LLC | 5.1% | 13G | Nov 14, 2025 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Reg FD disclosure (7.01) | Jul 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 1, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Jun 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 22, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 10, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 27, 2026 | filing ↗ |
| Other events (8.01) | Apr 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 27, 2026 | filing ↗ |
| Earnings (2.02) | Mar 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 5, 2026 | filing ↗ |
| Earnings (2.02) | Jan 6, 2026 | filing ↗ |
| Other events (8.01) | Jan 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 6, 2026 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Material agreement (1.01) | Aug 12, 2025 | filing ↗ |
| Other events (8.01) | Aug 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 12, 2025 | filing ↗ |
| Earnings (2.02) | Aug 11, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 11, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 11, 2025 | filing ↗ |