Exhibit 99.1 Sotera Health Reports Third-Quarter and Year-to-Date 2024 Results • Q3 2024 net revenues of 285millionincreased8.517 million or 0.06perdilutedshare,comparedtonetlossof14 million or 0.05perdilutedshareinQ32023•Q32024AdjustedEBITDAof146 million increased 9.0%, compared to Q3 2023 • Q3 2024 Adjusted EPS of 0.17increased0.01 per diluted share, compared to Q3 2023 • Reaffirming 2024 Net Revenue and Adjusted EBITDA outl ...