<div id="readability-page-1"><div><p><span>Petras Michael B Jr Grantor Tr, Shareholder of Sotera Health Co [SHC], filed a Form 144 on December 8, 2025 with the Securities and Exchange Commission proposing to sell restricted securities:</span></p><div><table><tbody><tr><td><span>Approximate Date Of Sale</span></td><td><span>12/8/25</span></td></tr><tr><td><span>Shares</span></td><td><span>394,861</span></td></tr><tr><td><span>Broker</span></td><td><span>JP Morgan Securities LLC</span></td></tr></tbody></table></div><p><span>Prior to the sale of restricted stock, owners must file a Form 144 with the SEC.  Upon submission of the filing to the SEC the owner is permitted to sell the shares, or any fraction thereof, within 90 days.</span></p><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>

<p>Shareholder Petras Michael B Jr Grantor Tr filed a Form 144 with the SEC to sell 394,861 shares of Sotera Health Co on December 8, 2025. The sale will be conducted through JP Morgan Securities LLC. Form 144 allows the sale of restricted securities within 90 days of filing.</p>

Shareholder Petras Michael B Jr Grantor Tr Files To Sell 394,861 Of Sotera Health Co [SHC]