Cullinan Therapeutics, Inc. (CGEM) Insider Trading
Over the last 3 months, CGEM insiders made 0 open-market buys and 2 sales, a net sale of -$117K (SEC Form 4). Over the last 6 months, 136 institutions increased and 84 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
2
Net (3m)
-$117.0K
Insider trades by month Buys Sells
Nov
Dec
Jan
Feb
Mar
May
Context3-month price +28.1%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 18, 2026 | Allen Andrew Rdirector | Grant | 21,781 | $13.55 |
| Jun 18, 2026 | Thistle Marydirector | Grant | 25,319 | $13.55 |
| Jun 18, 2026 | Doyle Mittiedirector | Grant | 21,781 | $13.55 |
| Jun 18, 2026 | Rosenberg Anthonydirector | Grant | 25,319 | $13.55 |
| Jun 18, 2026 | Meek David D.director | Grant | 25,319 | $13.55 |
| Jun 18, 2026 | Webster Stephen Wdirector | Grant | 25,319 | $13.55 |
| May 6, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Sell | 7,800 | $14.60 |
| May 6, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Sell | 200 | $15.58 |
| May 6, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Option | 4,000 | $4.30 |
| Mar 9, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Sell | 8,000 | $15.68 |
| Mar 9, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Option | 4,000 | $4.30 |
| Feb 26, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Sell | 1,780 | $14.14 |
| Feb 25, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Sell | 3,601 | $14.47 |
| Feb 25, 2026 | SUMER JACQUELYN Lofficer: Chief Legal Officer | Sell | 3,601 | $14.47 |
| Feb 25, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Sell | 1,752 | $13.99 |
| Feb 25, 2026 | Jones Jeffrey Alanofficer: Chief Medical Officer | Sell | 4,582 | $14.47 |
| Feb 25, 2026 | AHMED NADIMdirector, officer: President and CEO | Sell | 13,515 | $14.47 |
| Feb 23, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Sell | 8,000 | $14.30 |
| Feb 23, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Sell | 3,742 | $13.62 |
| Feb 23, 2026 | Fenton Mary Kayofficer: Chief Financial Officer | Sell | 4,398 | $13.62 |
| Feb 23, 2026 | Jones Jeffrey Alanofficer: Chief Medical Officer | Sell | 4,982 | $13.62 |
| Feb 23, 2026 | AHMED NADIMdirector, officer: President and CEO | Sell | 16,381 | $13.62 |
| Feb 23, 2026 | SUMER JACQUELYN Lofficer: Chief Legal Officer | Sell | 3,742 | $13.62 |
| Feb 23, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Option | 8,000 | $4.30 |
| Feb 19, 2026 | Fenton Mary Kayofficer: Chief Financial Officer | Grant | 137,500 | $12.44 |
| Feb 19, 2026 | SUMER JACQUELYN Lofficer: Chief Legal Officer | Grant | 230,000 | $12.44 |
| Feb 19, 2026 | Savill Corrineofficer: Chief Business Officer | Grant | 175,000 | $12.44 |
| Feb 19, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Grant | 57,500 | — |
| Feb 19, 2026 | Michaelson Jenniferofficer: Chief Scientific Officer | Grant | 115,000 | $12.44 |
| Feb 19, 2026 | Fenton Mary Kayofficer: Chief Financial Officer | Grant | 68,750 | — |
Source: CGEM SEC Form 4 filings, latest Jun 18, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their CGEM positions over the last 6 months (SEC Form 13F).
Increased
136
New positions
64
Reduced
84
Sold out
37
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| LYNX1 CAPITAL MANAGEMENT LP | Increased | 9.0M | Feb 17, 2026 |
| LYNX1 CAPITAL MANAGEMENT LP | Unchanged | 9.0M | May 4, 2026 |
| BIOIMPACT CAPITAL LLC | Unchanged | 7.6M | May 15, 2026 |
| BIOIMPACT CAPITAL LLC | Unchanged | 7.6M | Feb 17, 2026 |
| BVF INC/IL | Unchanged | 5.8M | May 15, 2026 |
| BVF INC/IL | Unchanged | 5.8M | Feb 17, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 5.0M | May 15, 2026 |
| BLACKROCK, INC. | Increased | 4.4M | May 13, 2026 |
| BLACKROCK, INC. | Increased | 4.4M | Feb 12, 2026 |
| VANGUARD GROUP INC | Increased | 3.3M | Jan 29, 2026 |
| KYNAM CAPITAL MANAGEMENT, LP | Unchanged | 3.1M | May 15, 2026 |
| KYNAM CAPITAL MANAGEMENT, LP | Increased | 3.1M | Feb 17, 2026 |
| STATE STREET CORP | Increased | 2.5M | May 15, 2026 |
| BLUE OWL CAPITAL HOLDINGS LP | Reduced | 2.4M | Feb 20, 2026 |
| STATE STREET CORP | Increased | 2.2M | Feb 13, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.