Cullinan Therapeutics, Inc (CGEM) insider trading
Every open-market stock purchase and sale by Cullinan Therapeutics, Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- Jennifer Michaelson (C-suite exec) sold $780K in the last 90 days.
- Last insider buy: Lynx1 Capital Management LP (10% owner), $1.4M, 12 months ago.
Last 12 months: insiders bought $1.4M (1 buy) and sold $2.5M (24 sales). Last close $14.89 on Oct 21, 2026.
Recent CGEM insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Sep 8, 2026 | Jennifer Michaelson (C-suite exec) | Sold | $173K |
| Sep 8, 2026 | Jennifer Michaelson (C-suite exec) | Bought (not open market) | $17.2K |
| Sep 8, 2026 | Jennifer Michaelson (C-suite exec) | Bought (not open market) | — |
| Aug 13, 2026 | Jennifer Michaelson (C-suite exec) | Sold | $608K |
| Aug 13, 2026 | Jennifer Michaelson (C-suite exec) | Bought (not open market) | $129K |
| Aug 13, 2026 | Jennifer Michaelson (C-suite exec) | Bought (not open market) | — |
| Jul 6, 2026 | Jennifer Michaelson (C-suite exec) | Sold | $143K |
| Jul 6, 2026 | Jennifer Michaelson (C-suite exec) | Bought (not open market) | $17.2K |
| Jul 6, 2026 | Jennifer Michaelson (C-suite exec) | Bought (not open market) | — |
| Jun 30, 2026 | Jacquelyn L Sumer (C-suite exec) | Bought (not open market) | $21.2K |
| Jun 30, 2026 | Mary Kay Fenton (CFO) | Bought (not open market) | $13.3K |
| Jun 16, 2026 | Andrew R Allen (Insider) | Bought (not open market) | — |
| Jun 16, 2026 | Mittie Doyle (Insider) | Bought (not open market) | — |
| Jun 16, 2026 | Mary Thistle (Insider) | Bought (not open market) | — |
| Jun 16, 2026 | Stephen W Webster (Insider) | Bought (not open market) | — |
| Jun 16, 2026 | David D. Meek (Insider) | Bought (not open market) | — |
| Jun 16, 2026 | Anthony Rosenberg (Insider) | Bought (not open market) | — |
| May 5, 2026 | Jennifer Michaelson (C-suite exec) | Sold | $114K |
| May 5, 2026 | Jennifer Michaelson (C-suite exec) | Sold | $3.1K |
| May 5, 2026 | Jennifer Michaelson (C-suite exec) | Bought (not open market) | — |
| Mar 5, 2026 | Jennifer Michaelson (C-suite exec) | Sold | $125K |
| Mar 5, 2026 | Jennifer Michaelson (C-suite exec) | Bought (not open market) | — |
| Feb 25, 2026 | Jennifer Michaelson (C-suite exec) | Sold | $25.2K |
| Feb 24, 2026 | Nadim Ahmed (CEO) | Sold | $196K |
| Feb 24, 2026 | Jeffrey Alan Jones (C-suite exec) | Sold | $66.3K |
Who's trading CGEM
- Jennifer Michaelson, C-suite exec: sold $1.6M (18 sales), last Sep 8, 2026
- Jacquelyn L Sumer, C-suite exec: sold $137K (3 sales), last Jun 30, 2026
- Mary Kay Fenton, CFO: sold $59.9K (1 sale), last Jun 30, 2026
- Stephen W Webster, Insider: other filings, last Jun 16, 2026
- Andrew R Allen, Insider: other filings, last Jun 16, 2026
- Mittie Doyle, Insider: other filings, last Jun 16, 2026
- David D. Meek, Insider: other filings, last Jun 16, 2026
- Anthony Rosenberg, Insider: other filings, last Jun 16, 2026
- Mary Thistle, Insider: other filings, last Jun 16, 2026
- Jeffrey Alan Jones, C-suite exec: sold $179K (3 sales), last Feb 24, 2026
- Nadim Ahmed, CEO: sold $518K (3 sales), last Feb 24, 2026
- Corrine Savill, C-suite exec: other filings, last Feb 18, 2026
- Lynx1 Capital Management LP, 10% owner: bought $1.4M (1 buy), last Oct 28, 2025
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