Cogent Biosciences, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Kearns Evan | Chief Legal Officer | Sale | 65,000 | $38.70 | $2,515,500 | 109,398 | Dec 26, 2025 |
| Green John L. | Chief Financial Officer | Sale | 77,000 | $38.68 | $2,978,360 | 131,834 | Dec 26, 2025 |
| Sachs Jessica | Chief Medical Officer | Sale | 82,642 | $38.70 | $3,198,245 | 133,938 | Dec 26, 2025 |
| Robinson John Edward | Chief Scientific Officer | Sale | 90,000 | $38.74 | $3,486,600 | 140,002 | Dec 26, 2025 |
| Robinson John Edward | Chief Scientific Officer | Award / Grant | 320,000 | — | — | 370,000 | Dec 17, 2025 |
| Robbins Andrew R | President and CEO | Award / Grant | 840,000 | — | — | 1,025,000 | Dec 17, 2025 |
| Pinnow Cole | Chief Commercial Officer | Award / Grant | 50,000 | — | — | 97,450 | Dec 17, 2025 |
| Sachs Jessica | Chief Medical Officer | Award / Grant | 50,000 | — | — | 51,296 | Dec 17, 2025 |
| Kearns Evan | Chief Legal Officer | Tax Withholding | 125,602 | $39.45 | $4,954,999 | 174,398 | Dec 17, 2025 |
| Green John L. | Chief Financial Officer | Award / Grant | 300,000 | — | — | 353,841 | Dec 17, 2025 |
| Fairmount Funds Management LLC | — | Purchase | 2,777,777 | $9.00 | $24,999,993 | 9,003,418 | Jul 10, 2025 |
| Pinnow Cole | Chief Commercial Officer | Purchase | 43,750 | $7.60 | $332,500 | 45,848 | Jan 14, 2025 |
| Fairmount Funds Management LLC | — | Option Exercise | 1,500,000 | — | — | 6,225,641 | Jun 10, 2024 |
| Fairmount Funds Management LLC | — | Other | 286,851 | — | — | — | Mar 28, 2024 |
| Fairmount Funds Management LLC | — | Award / Grant | 1,166,666 | $7.50 | $8,749,995 | 4,438,790 | Feb 16, 2024 |
| Fairmount Funds Management LLC | — | Purchase | 800,000 | $12.00 | $9,600,000 | 3,272,124 | Jun 9, 2023 |
| Sachs Jessica | Chief Medical Officer | Award / Grant | 622 | $7.40 | $4,603 | 622 | Jun 30, 2022 |
| Fairmount Funds Management LLC | — | Purchase | 1,200,000 | $8.25 | $9,900,000 | 2,472,124 | Jun 16, 2022 |
| Sachs Jessica | Chief Medical Officer | Award / Grant | 674 | $6.82 | $4,597 | 674 | Dec 31, 2021 |
| Green John L. | Chief Financial Officer | Sale | 17,813 | $8.86 | $157,823 | 3,841 | Apr 26, 2021 |
| Green John L. | Chief Financial Officer | Award / Grant | 524 | — | — | 21,654 | Feb 25, 2021 |
| Green John L. | Chief Financial Officer | Award / Grant | 1,748 | — | — | 1,748 | Dec 1, 2020 |
| Venrock Healthcare Capital Partners III, L.P. | — | Purchase | 100,000 | $2.30 | $230,000 | 4,004,273 | Aug 17, 2020 |
| Green John L. | Chief Financial Officer | Tax Withholding | 31,873 | $2.20 | $70,121 | 77,586 | Jul 6, 2020 |
| Fairmount Funds Management LLC | — | Other | 1,147,406 | — | — | 1,147,406 | Jul 6, 2020 |
| CAMPANA DARIO | — | Sale | 1,800 | $0.40 | $720 | 3,493,314 | Apr 6, 2020 |
| Ettenberg Seth | Chief Scientific Officer | Sale | 11,485 | $4.12 | $47,318 | — | Mar 25, 2019 |
| Ettenberg Seth | Chief Scientific Officer | Sale | 11,485 | $4.25 | $48,811 | — | Feb 25, 2019 |
| Ettenberg Seth | Chief Scientific Officer | Sale | 11,485 | $4.05 | $46,514 | — | Dec 26, 2018 |
| Ettenberg Seth | Chief Scientific Officer | Sale | 11,485 | $7.00 | $80,395 | — | Nov 26, 2018 |
| Ettenberg Seth | Chief Scientific Officer | Option Exercise | 11,485 | $0.18 | $2,067 | 11,485 | Oct 25, 2018 |
| Ettenberg Seth | Chief Scientific Officer | Sale | 11,485 | $12.47 | $143,218 | — | Sep 25, 2018 |
| FIL Ltd | — | C | 27,342 | — | — | 1,138,274 | Apr 3, 2018 |
| FMR LLC | — | C | 8,601 | — | — | 358,063 | Apr 3, 2018 |
| Atlas Venture Associates IX, LLC | — | Purchase | 94,052 | $12.00 | $1,128,624 | 3,361,535 | Apr 3, 2018 |
| Booth Bruce | — | C | 3,184,446 | — | — | 3,184,446 | Apr 3, 2018 |
| Ratcliffe Liam | — | C | 622,772 | — | — | 622,772 | Apr 3, 2018 |