🕵️ Cytomx Therapeutics, Inc. ($CTMX)
SEC insider & ownership activity, last 12 months · CIK 1501989 · every row links its SEC filing
Over the last 12 months insiders sold $1.7M with no open-market buying against it. Sean McCarthy sold $1.2M through a 10b5-1 trading plan in 2 lots (Nov–Mar). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 4 sellers, $1.7M (6 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Sean McCarthy | 0 | – | 2 | $1.2M | Mar 17, 2026 |
| Belvin Marcia | 0 | – | 1 | $202K | Mar 17, 2026 |
| Chu Yu-Waye | 0 | – | 1 | $137K | Mar 17, 2026 |
| Ogden Christopher | 0 | – | 2 | $129K | Jun 15, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| FMR LLC | 14.6% | 13G | Feb 5, 2026 | filing ↗ | |
| Abigail P. Johnson | 14.6% | 13G | Feb 5, 2026 | filing ↗ | |
| Bong Y Koh | 8.2% | 13G | May 20, 2025 | filing ↗ | |
| Blackrock, Inc. | 7.6% | 13G | Jul 27, 2026 | filing ↗ | |
| Patrick G. Enright | 7.0% | 13G | May 15, 2026 | filing ↗ | |
| Juliet Tammenoms Bakker | 7.0% | 13G | May 15, 2026 | filing ↗ | |
| Kynam Capital Management, LP | 6.9% | 13G | May 15, 2026 | filing ↗ | |
| Kynam Capital Management GP, LLC | 6.9% | 13G | May 15, 2026 | filing ↗ | |
| Yue Tang | 6.9% | 13G | May 15, 2026 | filing ↗ | |
| Longitude Capital Partners V, LLC | 5.7% | 13G | May 15, 2026 | filing ↗ | |
| Longitude Venture Partners V, L.P. | 5.7% | 13G | May 15, 2026 | filing ↗ | |
| POINT72 Asset Management, L.P. | 5.0% | 13G | Apr 16, 2026 | filing ↗ | |
| POINT72 Capital Advisors, Inc. | 5.0% | 13G | Apr 16, 2026 | filing ↗ | |
| Steven A. Cohen | 5.0% | 13G | Apr 16, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Sean McCarthy | $462K | Nov 6, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jul 24, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 17, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Jun 17, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 17, 2026 | filing ↗ |
| Material agreement (1.01) | May 29, 2026 | filing ↗ |
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Other events (8.01) | Mar 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 17, 2026 | filing ↗ |
| Earnings (2.02) | Mar 16, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 16, 2026 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Other events (8.01) | Aug 13, 2025 | filing ↗ |
| Earnings (2.02) | Aug 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 7, 2025 | filing ↗ |