X0609 4 2026-08-17 0001822479 Sotera Health Co SHC 0001832387 Petras Michael B. Jr. false C/O SOTERA HEALTH COMPANY 9100 SOUTH HILLS BLVD, SUITE 300 BROADVIEW HEIGHTS OH 44147 true true false false Executive Chairman false Common Stock, $0.01 par value per share ("Common Stock") 2026-08-17 4 S false 294515 18.5011 D 397912 D Common Stock 2026-08-17 4 S false 850000 18.5011 D 3969393 I By Grantor Trust Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $18.50 - $18.855. The reporting person hereby undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. Price reported constitutes the average weighted price of shares sold. Shares were sold at varying prices in the range of $18.50 - $18.855. The reporting person hereby undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. Exhibit 24.1 - Power of Attorney Gregory S. Harvey, Attorney-in-Fact 2026-08-19