• Executive Chairman Michael B. Petras Jr. sold 294,515 Sotera Health shares on Aug. 17 at an average $18.5.
• He reported 397,912 shares owned directly following the sale.
• A grantor trust he reports sold 850,000 shares the same day at an average $18.5.
• The trust reported 3,969,393 shares owned following the sale.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Sotera Health Co. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001193125-26-356962), on August 19, 2026, and is solely responsible for the information contained therein.