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Exhibit 99.1 Sotera Health Sotera Health Reports Second - Quarter and First - Half 2021 Results ; Increases 2021 Outlook • • • • Q2 2021 net revenues of $ 252 million increased approximately 18 % , compared to Q2 2020 Q2 2021 net income of $ 43 million or $ 0.15 per diluted share , compared to net income of $ 7 million or $ 0.03 per diluted share in Q2 2020 Q2 2021 Adjusted EBITDA of $ 135 million increased approximately 18 % , compared to Q2 2020 Q2 2021 Adjusted EPS of $ 0.26 improved $ 0.12 compared to Q2 2020 Adjusted EPS of $ 0.14 June 30 , 2021 total debt of $ 1.9 billion and net debt of $ 1.7 billion ; net leverage ratio improved to 3.8x Increasing full - year 2021 revenue growth outlook from 9 % -12 % to 12 % -15 % and increasing full - year 2021 Adjusted EBITDA growth outlook from 11 % -16 % to 13 % -17 % Full redemption of $ 100M Senior Secured First - Lien Notes due 2026 scheduled for Q3 2021 CLEVELAND , OH , August 12 , 2021 – Sotera Health Company ( " Sotera Health " or the " Company " ) ( Nasdaq : SHC ) , a leading global provider of mission - critical end - to - end sterilization solutions , lab testing and advisory services for the healthcare industry , today announced financial results for the second quarter and first half of 2021 . Second - quarter 2021 net revenues increased 18.2 % to $ 252 million , compared with $ 213 million in the same period a year ago . Second - quarter 2021 net income attributable to Sotera Health ( " net income " ) was $ 43 million , or $ 0.15 per diluted share , compared with net income of $ 7 million , or $ 0.03 per diluted share in the second quarter of 2020. Adjusted EBITDA for the second - quarter 2021 increased 17.6 % over the second quarter of 2020 to $ 135 million . Second - quarter 2021 adjusted earnings per diluted share ( " Adjusted EPS " ) was $ 0.26 , compared to $ 0.14 in the second quarter of 2020 , an increase of $ 0.12 per diluted share . Please refer to the section " Non - GAAP Financial Measures " provided later in this release . For the first six months of 2021 , net revenues increased 15.6 % to $ 464 million , compared to $ 401 million for the same period in 2020. Net income was $ 53 million , or $ 0.19 per diluted share for the first half of 2021 , compared with net income of $ 5 million , or $ 0.02 per diluted share , for the same period last year . First half of 2021 Adjusted EBITDA increased 16.3 % to $ 240 million and Adjusted EPS grew by $ 0.20 to $ 0.44 compared to the first half of 2020. Please refer to the section " Non - GAAP Financial Measures " provided later in this release . " Today , we are reporting another quarter of double - digit top - line and earnings growth , while continuing to make meaningful progress on strategic priorities and deleveraging , ” said Chairman and Chief Executive Officer , Michael B. Petras , Jr. “ All three of our segments are executing well on their business strategy while managing ongoing challenges related to the global pandemic . " 1