🕵️ Cullinan Therapeutics, Inc. ($CGEM)
SEC insider & ownership activity, last 12 months · CIK 1789972 · every row links its SEC filing
Over the last 12 months insiders sold $1.7M against $13.3M of open-market buying. LYNX1 Capital Management LP bought $13.3M (Oct). No red-flag 8-Ks in the window.
🚨 1 signal active —
planned-vs-executed verdicts, pre-event flags, and cluster context live in the
API and the
alerts bot.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $13.3M (8 lots) · 5 sellers, $1.7M (26 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| LYNX1 Capital Management LP | 8 | $13.3M | 0 | – | Oct 28, 2025 |
| Jennifer Michaelson | 0 | – | 16 | $835K | Jul 6, 2026 |
| Ahmed Nadim | 0 | – | 3 | $518K | Feb 24, 2026 |
| Jones Jeffrey Alan | 0 | – | 3 | $179K | Feb 24, 2026 |
| Jacquelyn L. Sumer | 0 | – | 3 | $137K | Feb 24, 2026 |
| Fenton Mary Kay | 0 | – | 1 | $60K | Feb 20, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| LYNX1 Capital Management LP | 14.5% | 13G | Oct 10, 2025 | filing ↗ | |
| Weston Nichols | 14.5% | 13G | Oct 10, 2025 | filing ↗ | |
| BVF Partners L P/IL | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| BVF INC/IL | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| Mark N. Lampert | 10.0% | 13G | May 15, 2026 | filing ↗ | |
| LYNX1 Capital Management LP | 9.8% | 13G | Nov 14, 2025 | filing ↗ | |
| Weston Nichols | 9.8% | 13G | Nov 14, 2025 | filing ↗ | |
| BVF GP Holdings LLC | 9.4% | 13G | May 15, 2026 | filing ↗ | |
| Biotechnology Value Fund L P | 5.8% | 13G | May 15, 2026 | filing ↗ | |
| BVF I GP LLC | 5.8% | 13G | May 15, 2026 | filing ↗ | |
| Kynam Capital Management, LP | 5.3% | 13G | Mar 4, 2026 | filing ↗ | |
| Kynam Capital Management GP, LLC | 5.3% | 13G | Mar 4, 2026 | filing ↗ | |
| Yue Tang | 5.3% | 13G | Mar 4, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Jennifer Michaelson | $141K | Jul 6, 2026 | filing ↗ |
| Jennifer Michaelson | $123K | May 5, 2026 | filing ↗ |
| Jennifer Michaelson | $130K | Mar 5, 2026 | filing ↗ |
| Jennifer Michaelson | $25K | Feb 25, 2026 | filing ↗ |
| Jennifer Michaelson | $24K | Feb 23, 2026 | filing ↗ |
| Jennifer Michaelson | $111K | Feb 20, 2026 | filing ↗ |
| Jennifer Michaelson | $46K | Jan 22, 2026 | filing ↗ |
| Jennifer Michaelson | $13K | Dec 19, 2025 | filing ↗ |
| Jennifer Michaelson | $12K | Dec 15, 2025 | filing ↗ |
| Jennifer Michaelson | $38K | Nov 24, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | Jun 16, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 10, 2026 | filing ↗ |
| Other events (8.01) | Jun 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 10, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 6, 2026 | filing ↗ |
| Other events (8.01) | Jun 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 6, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 18, 2026 | filing ↗ |
| Other events (8.01) | May 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 18, 2026 | filing ↗ |
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Earnings (2.02) | Mar 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 10, 2026 | filing ↗ |
| Earnings (2.02) | Jan 8, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 8, 2026 | filing ↗ |
| Other events (8.01) | Jan 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 8, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 8, 2025 | filing ↗ |
| Other events (8.01) | Dec 8, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 8, 2025 | filing ↗ |
| Agreement terminated (1.02) | Nov 18, 2025 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Other events (8.01) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 3, 2025 | filing ↗ |
| Other events (8.01) | Nov 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 3, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 4, 2025 | filing ↗ |
| Other events (8.01) | Sep 4, 2025 | filing ↗ |