X0306 4 2017-02-14 0 0001624899 Steris plc STE 0001697095 Burton Karen L C/O CHANCERY HOUSE, 190 WATERSIDE RD. HAMILTON INDUSTRIAL PARK LEICESTER X0 LE5 1QZ UNITED KINGDOM 0 1 0 0 VP, Controller & CAO Ordinary Shares, 0.10 par value 2017-02-14 4 M 0 475 30.84 A 9201 D Ordinary Shares, 0.10 par value 2017-02-14 4 S 0 475 67.69 D 8726 D Ordinary Shares, 0.10 par value 2017-02-14 4 M 0 500 31.87 A 9226 D Ordinary Shares, 0.10 par value 2017-02-14 4 S 0 500 67.69 D 8726 D Ordinary Shares, 0.10 par value 318 I By 401(k) Employee Stock Option (right to buy) 30.84 2017-02-14 4 M 0 475 0.00 D 2018-05-21 Ordinary Shares 475 0 D Employee Stock Option (right to buy) 31.87 2017-02-14 4 M 0 500 0.00 D 2020-05-20 Ordinary Shares 500 3300 D This exercise and sale of a total of 975 ordinary shares is pursuant to a Rule 10b5-1 Stock Trading Plan entered into by the Reporting Person on December 5, 2016. 5,956 of these shares are restricted and vest as follows: 1,300 on May 31, 2017; 1,000 on April 2, 2018; 972 on May 30, 2018; 764 on May 28, 2019; 700 on October 1, 2019 and 1,220 on June 1, 2020. Based on closing price of February 14, 2017. This option was granted as part of an award of 2,100 ordinary shares, 1,625 of which have previously been exercised. This option was granted on May 20, 2010 and is fully vested. /s/ Ronald E. Snyder, Authorized Representative under Power of Attorney 2017-02-16