Exhibit 99.1 Sotera Health Reports Second-Quarter and First-Half 2024 Results • Q2 2024 net revenues of 277millionincreased89 million or 0.03perdilutedshare,comparedtonetincomeof24 million or 0.08perdilutedshareinQ22023•Q22024AdjustedEBITDAof137 million increased 7%, compared to Q2 2023 • Q2 2024 Adjusted EPS of 0.19declined0.01 per diluted share, compared to Adjusted EPS of $0.20 in Q2 2023 • Successfully refinanced debt stru ...