<div id="readability-page-1"><div>Basta Steven L Chief Executive Officer of Phathom Pharmaceutials Inc [PHAT] 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>62,038</td><td>$0.00</td><td>N/A</td></tr><tr><td>12/17/25</td><td>Surrender(1)</td><td>31,502</td><td>$15.36</td><td>$483,871</td></tr></tbody></table></div>Ending Holdings: 113,786 - 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>

PHAT

Steven L. Basta, CEO of Phathom Pharmaceuticals Inc, filed a Form 4 with the SEC on December 19, 2025, disclosing changes in ownership. On December 17, 2025, he exercised 62,038 shares and surrendered 31,502 shares at $15.36 each to cover option exercise costs and/or tax liabilities. His ending direct holdings are 113,786 shares.

CEO Basta Acquires 30,536 Of Phathom Pharmaceutials Inc [PHAT]