7 insiders reported 29 Form 4 transactions for Cogent Biosciences, Inc. (COGT) over the past 18 months (most recent 2026-05-21). Recent activity: Robbins Andrew R (President and CEO) Buy 160,000 shares, Robbins Andrew R (President and CEO) Sell 160,000 shares, Fairmount Funds Management LLC (Director) Buy 7.0M shares, Fairmount Funds Management LLC (Director) Sell 7.0M shares, Fairmount Funds Management LLC (Director) Sell 3.5M shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-21 | Robbins Andrew R | President and CEO | Buy | 160,000 | $0 |
| 2026-05-21 | Robbins Andrew R | President and CEO | Sell | 160,000 | $0 |
| 2026-03-31 | Fairmount Funds Management LLC | Director | Buy | 7.0M | $0 |
| 2026-03-31 | Fairmount Funds Management LLC | Director | Sell | 7.0M | $242.6M |
| 2026-01-22 | Fairmount Funds Management LLC | Director | Sell | 3.5M | $127.4M |
| 2025-12-30 | Kearns Evan | Chief Legal Officer | Sell | 65,000 | $2.5M |
| 2025-12-30 | Sachs Jessica | Chief Medical Officer | Sell | 82,642 | $3.2M |
| 2025-12-30 | Green John L. | Chief Financial Officer | Sell | 77,000 | $3.0M |
| 2025-12-30 | Robinson John Edward | Chief Scientific Officer | Sell | 90,000 | $3.5M |
| 2025-12-19 | Green John L. | Chief Financial Officer | Buy | 300,000 | $0 |
| 2025-12-19 | Robbins Andrew R | President and CEO | Buy | 840,000 | $0 |
| 2025-12-19 | Robbins Andrew R | President and CEO | Sell | 367,497 | $14.5M |
| 2025-12-19 | Robbins Andrew R | President and CEO | Buy | 185,000 | $0 |
| 2025-12-19 | Sachs Jessica | Chief Medical Officer | Buy | 50,000 | $0 |
| 2025-12-19 | Green John L. | Chief Financial Officer | Sell | 145,007 | $5.7M |
| 2025-12-19 | Robinson John Edward | Chief Scientific Officer | Buy | 50,000 | $0 |
| 2025-12-19 | Robinson John Edward | Chief Scientific Officer | Buy | 320,000 | $0 |
| 2025-12-19 | Robinson John Edward | Chief Scientific Officer | Sell | 139,998 | $5.5M |
| 2025-12-19 | Pinnow Cole | Chief Commercial Officer | Buy | 50,000 | $0 |
| 2025-12-19 | Green John L. | Chief Financial Officer | Buy | 50,000 | $0 |
| 2025-12-19 | Pinnow Cole | Chief Commercial Officer | Sell | 94,800 | $3.7M |
| 2025-12-19 | Kearns Evan | Chief Legal Officer | Buy | 40,000 | $0 |
| 2025-12-19 | Kearns Evan | Chief Legal Officer | Buy | 260,000 | $0 |
| 2025-12-19 | Kearns Evan | Chief Legal Officer | Sell | 125,602 | $5.0M |
| 2025-12-19 | Pinnow Cole | Chief Commercial Officer | Buy | 214,000 | $0 |
Source: SEC Form 4 filings · as of 2026-05-21