Exhibit 99.1 STERIS Announces Financial Results for Fiscal 2024 Fourth Quarter and Full Year • Total fiscal 2024 revenue increase 12% to $5.5 billion • Total fiscal 2024 U.S. GAAP earnings per diluted share of$3.81; adjusted earnings per diluted share increase to $8.83 • Targeted restructuring plan announced DUBLIN, IRELAND - (May 8, 2024) - STERIS plc (NYSE: STE) (“STERIS” or the “Company”) today announced financial results for its fiscal 2024 fourth quarter ended March 31, 2024. Total revenue for the fou ...