CGEM · Insider trading · 13F holders · Congress trades
Cullinan Therapeutics, Inc. (CGEM)
Who is buying and selling CGEM: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 17
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $780K
- Congress trades, 12 months
- 0
CGEM at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 CGEM insider filed 2 sales worth $780K on SEC Form 4, and no open-market purchases; 2 of the sales were pre-planned under Rule 10b5-1.
- 17 13F filers hold CGEM among their 50 largest positions, worth $723.1M combined. The biggest bets by portfolio weight are Lynx1 Capital Management LP (18.9%), Mpm Bioimpact LLC (10.8%) and Blue Owl Capital Holdings LP (4.3%). In their latest 13Fs, 1 manager opened a new position and 5 added to one.
- No member of Congress has disclosed a trade in CGEM.
- CGEM last closed at $15.45 on Oct 29, 2026.
CGEM insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 CGEM insider filed 2 sales worth $780K on SEC Form 4, and no open-market purchases; 2 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Sep 10, 2026 | Michaelson Jennifer | Chief Scientific Officer | Sale10b5-1 | 8,000 | $21.57 | $173K | SEC |
| Aug 14, 2026 | Michaelson Jennifer | Chief Scientific Officer | Sale10b5-1 | 30,000 | $20.26 | $608K | SEC |
Who owns CGEM? Hedge funds and superinvestors
17 13F filers hold CGEM among their 50 largest positions, worth $723.1M combined. The biggest bets by portfolio weight are Lynx1 Capital Management LP (18.9%), Mpm Bioimpact LLC (10.8%) and Blue Owl Capital Holdings LP (4.3%). In their latest 13Fs, 1 manager opened a new position and 5 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Mpm Bioimpact LLCHedge fund | 10.8% | $177.2M | 9,731,341 | +27.2% shares | Q2 2026 |
| Lynx1 Capital Management LPHedge fund | 18.9% | $163.2M | 8,963,500 | +0.0% shares | Q2 2026 |
| Bvf Inc/ilInvestment manager | 2.7% | $104.7M | 5,750,683 | +0.0% shares | Q2 2026 |
| Kynam Capital Management, LPHedge fund | 3.1% | $56.7M | 3,114,132 | +0.0% shares | Q2 2026 |
| Rtw Investments, LPHedge fund | 0.4% | $43.1M | 2,364,347 | — | Q2 2026 |
| Siren, L.L.C.Investment manager | 0.7% | $34.5M | 1,893,410 | +58.7% shares | Q2 2026 |
| Blue Owl Capital Holdings LPHedge fund | 4.3% | $28.0M | 1,539,764 | -19.4% shares | Q2 2026 |
| Venrock Adviser, LLCHedge fund | 0.8% | $25.1M | 1,379,965 | +0.0% shares | Q2 2026 |
| Boothbay Fund Management, LLCHedge fund | 0.4% | $19.7M | 1,082,611 | -2.7% shares | Q2 2026 |
| Affinity Asset Advisors, LLCHedge fund | 0.8% | $15.9M | 875,760 | +12.1% shares | Q2 2026 |
| Boone Capital Management LLCHedge fund | 3.0% | $12.8M | 704,442 | New | Q2 2026 |
| Elmind Capital, LPHedge fund | 3.2% | $12.6M | 690,000 | +30.2% shares | Q2 2026 |
| Twin Focus Capital Partners, LLCWealth manager | 1.1% | $10.8M | 595,489 | +0.0% shares | Q2 2026 |
| TCG Crossover Management, LLCHedge fund | 0.2% | $7.4M | 406,786 | +0.0% shares | Q2 2026 |
| Great Point Partners LLCHedge fund | 1.3% | $5.5M | 300,000 | +0.0% shares | Q2 2026 |
| Bleichroeder LPHedge fund | 0.8% | $4.6M | 250,000 | +150.0% shares | Q2 2026 |
| Knott David M JrInvestment manager | 0.7% | $1.3M | 69,182 | — | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 17). Screen CGEM in the grand portfolio →
CGEM stock trades by members of Congress
No member of Congress has disclosed a trade in CGEM.
CGEM questions and answers
Are insiders buying CGEM stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 CGEM insider filed 2 sales worth $780K on SEC Form 4, and no open-market purchases; 2 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own CGEM?
17 13F filers hold CGEM among their 50 largest positions, worth $723.1M combined. The biggest bets by portfolio weight are Lynx1 Capital Management LP (18.9%), Mpm Bioimpact LLC (10.8%) and Blue Owl Capital Holdings LP (4.3%). In their latest 13Fs, 1 manager opened a new position and 5 added to one.
Has Congress traded CGEM?
No member of Congress has disclosed a trade in CGEM.
Who is the largest holder of CGEM?
Among 13F filers, Mpm Bioimpact LLC reports the largest CGEM position, $177.2M (9,731,341 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Lynx1 Capital Management LP's: 18.9% of its portfolio.
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