<div id="readability-page-1"><div>Pinnow Cole Officer of Cogent Biosciences Inc [COGT] filed a Form 4 on December 19, 2025 with the Securities and Exchange Commission disclosing the following changes in ownership:<div><table><tbody><tr><th>Date</th><th>Transaction</th><th>Shares</th><th>Price</th><th>Value</th></tr><tr><td>12/17/25</td><td>Exercise</td><td>214,000</td><td>$0.00</td><td>N/A</td></tr><tr><td>12/17/25</td><td>Surrender(1)</td><td>94,800</td><td>$39.45</td><td>$3,739,860</td></tr></tbody></table></div>Ending Holdings: 216,650 - Direct<ul><li>(1)</li><li>Surrender of shares back to company to pay option exercise cost and/or resulting tax liability.</li></ul>For a free trial, or to learn more about our insider trading analysis and data services, please visit http://www.washingtonservice.com or contact us at (301) 913-5100 or send an email to info@washingtonservice.com.Founded in 1970, The Washington Service provides securities professionals with financial, economic and public policy research and data. </div></div>

COGT

Officer Pinnow Cole of Cogent Biosciences Inc filed a Form 4 with the SEC, disclosing changes in ownership. On December 17, 2025, Pinnow exercised 214,000 shares and surrendered 94,800 shares at $39.45 each to cover option exercise costs and tax liabilities. The ending direct holdings are 216,650 shares. This transaction highlights insider trading activities within the company.

Officer Pinnow Acquires 119,200 Of Cogent Biosciences Inc [COGT]