<div id="readability-page-1"><div><p><span>Klein Matthew B Chief Executive Officer of PTC Therapeutics Inc [PTCT] filed a Form 4 on December 3, 2025 with the Securities and Exchange Commission disclosing the following changes in ownership:</span></p><div><table><tbody><tr><th><span>Date</span></th><th><span>Transaction</span></th><th><span>Shares</span></th><th><span>Price</span></th><th><span>Value</span></th></tr><tr><td><span>12/1/25</span></td><td><span>Exercise</span></td><td><span>7,812</span></td><td><span>$0.00</span></td><td><span>N/A</span></td></tr><tr><td><span>12/2/25</span></td><td><span>Planned Surrender(1)(2)</span></td><td><span>3,428</span></td><td><span>$79.07</span></td><td><span>$271,052</span></td></tr></tbody></table></div><p><span>Ending Holdings: 349,964 - Direct</span></p><div><table><tbody><tr><td><span>(1)</span></td><td><span>Surrender of shares back to company to pay option exercise cost and/or resulting tax liability.</span></td></tr><tr><td><span>(2)</span></td><td><span>Executed pursuant to a prearranged trading plan (10b5-1).</span></td></tr></tbody></table></div><p><span>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.</span></p><p><span>Founded in 1970, The Washington Service provides securities professionals with financial, economic and public policy research and data.</span></p><span> </span></div></div>

PTCT

<p>CEO Matthew B. Klein of PTC Therapeutics Inc. filed a Form 4 with the SEC, disclosing changes in ownership. On December 1, 2025, he exercised 7,812 shares at $0.00, and on December 2, 2025, he surrendered 3,428 shares at $79.07, valued at $271,052, under a prearranged trading plan (10b5-1). Ending holdings are 349,964 shares directly.</p>

CEO Klein Acquires 4,384 Of PTC Therapeutics Inc [PTCT]