8 insiders reported 32 Form 4 transactions for Cogent Biosciences, Inc. (COGT) over the past 18 months (most recent 2026-08-31). Recent activity: Morris Arlene (Director) Buy 41,927 shares, Morris Arlene (Director) Buy 3,583 shares, Morris Arlene (Director) Sell 42,349 shares, Morris Arlene (Director) Sell 3,161 shares, Robbins Andrew R (President and CEO) Sell 160,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-31 | Morris Arlene | Director | Buy | 41,927 | $236,468 |
| 2026-08-31 | Morris Arlene | Director | Buy | 3,583 | $9,029 |
| 2026-08-31 | Morris Arlene | Director | Sell | 42,349 | $1.6M |
| 2026-08-31 | Morris Arlene | Director | Sell | 3,161 | $118,663 |
| 2026-05-21 | Robbins Andrew R | President and CEO | Sell | 160,000 | $0 |
| 2026-05-21 | Robbins Andrew R | President and CEO | Buy | 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 | Robinson John Edward | Chief Scientific Officer | Sell | 90,000 | $3.5M |
| 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 | Kearns Evan | Chief Legal Officer | Sell | 65,000 | $2.5M |
| 2025-12-19 | Robbins Andrew R | President and CEO | Buy | 185,000 | $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 | Green John L. | Chief Financial Officer | Buy | 50,000 | $0 |
| 2025-12-19 | Green John L. | Chief Financial Officer | Buy | 300,000 | $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 | Pinnow Cole | Chief Commercial Officer | Buy | 214,000 | $0 |
| 2025-12-19 | Pinnow Cole | Chief Commercial Officer | Sell | 94,800 | $3.7M |
Source: SEC Form 4 filings · as of 2026-08-31