COGT insider buying and SEC filings, explained
Cogent Biosciences, Inc. · CIK 1622229
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$139.6M
Planned sales (10b5-1)
$1.7M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Aug 27, 2026 | Planned (10b5-1) | Arlene Morris (Director) sold 45,510 shares at about $37.12 ($1.7M), marked as a 10b5-1 plan trade. Holdings down 100% to 0 shares. | SEC filing Filed Aug 31, 2026 |
| Jan 22, 2026 | Sale | Fairmount Funds Management LLC (Director) sold 3,500,000 shares indirectly (by entity) at $36.40 ($127.4M). Holdings by entity down 39% to 5,503,418 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 22, 2026 |
| Dec 26, 2025 | Sale | Evan Kearns (Chief Legal Officer) sold 65,000 shares at about $38.70 ($2.5M). Holdings down 37% to 109,398 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 30, 2025 |
| Dec 26, 2025 | Sale | John L. Green (CFO) sold 77,000 shares at about $38.68 ($3.0M). Holdings down 37% to 131,834 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 30, 2025 |
| Dec 26, 2025 | Sale | Jessica Sachs (Chief Medical Officer) sold 82,642 shares at about $38.70 ($3.2M). Holdings down 38% to 133,938 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 30, 2025 |
| Dec 26, 2025 | Sale | John Edward Robinson (Chief Scientific Officer) sold 90,000 shares at about $38.74 ($3.5M). Holdings down 39% to 140,002 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 30, 2025 |
20 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
Follow COGT in the Insider Ledger app
Get the appA plain-English brief of insider purchases, 8-Ks and red flags at the companies you pick. No account needed.