Cullinan Oncology LLC (CGEM)
Insider transactions
A complete record of Form 4 filings tracking every share acquisition and disposal by executives, directors, and senior officers. Filterable by date range and transaction type, the table exposes the direct market actions of those with the deepest knowledge of a company's operations — providing a factual, data-driven signal of internal conviction that complements traditional fundamental and technical analysis.
Transaction date | Executive | Executive Title | Security Type | Acquisition / Disposal | Shares | Share price |
|---|---|---|---|---|---|---|
| Sep 8, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 8,000 | 21.57 |
| Sep 8, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Acquisition | 4,000 | 4.3 |
| Sep 8, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Stock Option (Right to Buy) | Disposal | 4,000 | 0 |
| Aug 13, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Stock Option (Right to Buy) | Disposal | 30,000 | 0 |
| Aug 13, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Acquisition | 30,000 | 4.3 |
| Aug 13, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 30,000 | 20.26 |
| Jul 6, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 8,000 | 17.82 |
| Jul 6, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Acquisition | 4,000 | 4.3 |
| Jul 6, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Stock Option (Right to Buy) | Disposal | 4,000 | 0 |
| Jun 30, 2026 | SUMER, JACQUELYN L | Chief Legal Officer | Common Stock | Acquisition | 2,470 | 8.6 |
| Jun 30, 2026 | FENTON, MARY KAY | Chief Financial Officer | Common Stock | Acquisition | 1,541 | 8.6 |
| Jun 16, 2026 | MEEK, DAVID D. | Director | Stock Option (Right to Buy) | Acquisition | 25,319 | 0 |
| Jun 16, 2026 | THISTLE, MARY | Director | Stock Option (Right to Buy) | Acquisition | 25,319 | 0 |
| Jun 16, 2026 | ALLEN, ANDREW R | Director | Stock Option (Right to Buy) | Acquisition | 21,781 | 0 |
| Jun 16, 2026 | WEBSTER, STEPHEN W | Director | Stock Option (Right to Buy) | Acquisition | 25,319 | 0 |
| Jun 16, 2026 | ROSENBERG, ANTHONY | Director | Stock Option (Right to Buy) | Acquisition | 25,319 | 0 |
| Jun 16, 2026 | DOYLE, MITTIE | Director | Stock Option (Right to Buy) | Acquisition | 21,781 | 0 |
| May 5, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Stock Option (Right to Buy) | Disposal | 4,000 | 0 |
| May 5, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 200 | 15.58 |
| May 5, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Acquisition | 4,000 | 4.3 |
| May 5, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 7,800 | 14.6 |
| Mar 5, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Stock Option (Right to Buy) | Disposal | 4,000 | 0 |
| Mar 5, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Acquisition | 4,000 | 4.3 |
| Mar 5, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 8,000 | 15.68 |
| Feb 25, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 1,780 | 14.14 |
| Feb 24, 2026 | JONES, JEFFREY ALAN | Chief Medical Officer | Common Stock | Disposal | 4,582 | 14.47 |
| Feb 24, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 3,601 | 14.47 |
| Feb 24, 2026 | SUMER, JACQUELYN L | Chief Legal Officer | Common Stock | Disposal | 3,601 | 14.47 |
| Feb 24, 2026 | AHMED, NADIM | Director, President and CEO | Common Stock | Disposal | 13,515 | 14.47 |
| Feb 23, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 1,752 | 13.99 |
| Feb 20, 2026 | AHMED, NADIM | Director, President and CEO | Common Stock | Disposal | 16,381 | 13.62 |
| Feb 20, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 3,742 | 13.62 |
| Feb 20, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 8,000 | 14.3 |
| Feb 20, 2026 | FENTON, MARY KAY | Chief Financial Officer | Common Stock | Disposal | 4,398 | 13.62 |
| Feb 20, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Acquisition | 8,000 | 4.3 |
| Feb 20, 2026 | JONES, JEFFREY ALAN | Chief Medical Officer | Common Stock | Disposal | 4,982 | 13.62 |
| Feb 20, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Stock Option (Right to Buy) | Disposal | 8,000 | 0 |
| Feb 20, 2026 | SUMER, JACQUELYN L | Chief Legal Officer | Common Stock | Disposal | 3,742 | 13.62 |
| Feb 18, 2026 | JONES, JEFFREY ALAN | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 300,000 | 0 |
| Feb 18, 2026 | SUMER, JACQUELYN L | Chief Legal Officer | Stock Option (Right to Buy) | Acquisition | 230,000 | 0 |
| Feb 18, 2026 | SAVILL, CORRINE | Chief Business Officer | Stock Option (Right to Buy) | Acquisition | 175,000 | 0 |
| Feb 18, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Acquisition | 57,500 | 0 |
| Feb 18, 2026 | FENTON, MARY KAY | Chief Financial Officer | Common Stock | Acquisition | 68,750 | 0 |
| Feb 18, 2026 | FENTON, MARY KAY | Chief Financial Officer | Stock Option (Right to Buy) | Acquisition | 137,500 | 0 |
| Feb 18, 2026 | AHMED, NADIM | Director, President and CEO | Stock Option (Right to Buy) | Acquisition | 828,000 | 0 |
| Feb 18, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Stock Option (Right to Buy) | Acquisition | 115,000 | 0 |
| Feb 12, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 416 | 12.03 |
| Jan 22, 2026 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 4,000 | 12.3 |
| Dec 31, 2025 | FENTON, MARY KAY | Chief Financial Officer | Common Stock | Acquisition | 27 | 6.49 |
| Dec 23, 2025 | AHMED, NADIM | Director, President and CEO | Common Stock | Disposal | 9,922 | 10.01 |
| Dec 19, 2025 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 1,345 | 10.01 |
| Dec 18, 2025 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 2,898 | 9.67 |
| Dec 18, 2025 | SUMER, JACQUELYN L | Chief Legal Officer | Common Stock | Disposal | 3,480 | 9.67 |
| Dec 18, 2025 | JONES, JEFFREY ALAN | Chief Medical Officer | Common Stock | Disposal | 4,632 | 9.67 |
| Dec 15, 2025 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 995 | 11.9 |
| Dec 12, 2025 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 2,148 | 12.38 |
| Nov 24, 2025 | MICHAELSON, JENNIFER | Chief Scientific Officer | Common Stock | Disposal | 4,000 | 12.3 |
| Oct 28, 2025 | LYNX1, CAPITAL MANAGEMENT LP | 10% Owner | Common stock, $0.0001 par value per share | Acquisition | 165,667 | 8.401 |
| Oct 17, 2025 | LYNX1, CAPITAL MANAGEMENT LP | 10% Owner | Common Stock | Acquisition | 32,217 | 7.84 |
| Oct 16, 2025 | LYNX1, CAPITAL MANAGEMENT LP | 10% Owner | Common Stock | Acquisition | 150,000 | 8.855 |
| Oct 15, 2025 | LYNX1, CAPITAL MANAGEMENT LP | 10% Owner | Common Stock | Acquisition | 51,500 | 7.943 |
| Oct 14, 2025 | LYNX1, CAPITAL MANAGEMENT LP | 10% Owner | Common stock, $0.0001 par value per share ("Common Stock") | Acquisition | 15,032 | 7.587 |
| Oct 10, 2025 | LYNX1, CAPITAL MANAGEMENT LP | 10% Owner | Common Stock | Acquisition | 277,298 | 7.362 |
| Oct 9, 2025 | LYNX1, CAPITAL MANAGEMENT LP | 10% Owner | Common Stock | Acquisition | 626,043 | 6.696 |
| Oct 8, 2025 | LYNX1, CAPITAL MANAGEMENT LP | 10% Owner | Common stock, $0.0001 par value per share ("Common Stock") | Acquisition | 556,300 | 6.46 |