X0306 4 2017-01-17 0 0001624899 Steris plc STE 0001532367 Bardwell Kathleen C/O CHANCERY HOUSE, 190 WATERSIDE RD. HAMILTON INDUSTRIAL PARK LEISCESTER X0 LE5 1QZ UNITED KINGDOM 0 1 0 0 Sr.V. P. & C.C.O. Ordinary Shares, 0.10 par value 2017-01-17 4 M 0 962 22.83 A 16538 D Ordinary Shares, 0.10 par value 2017-01-17 4 M 0 1000 34.23 A 17538 D Ordinary Shares, 0.10 par value 2017-01-17 4 S 0 1962 68.78 D 15576 D Employee Stock Option (right to buy) 22.83 2017-01-17 4 M 0 962 D 2019-05-21 Ordinary Shares 962 0 D Employee Stock Option (right to buy) 34.23 2017-01-17 4 M 0 1000 D 2019-11-12 Ordinary Shares 1000 0 D This exercise and sale of a total of 962 ordinary shares is pursuant to a Rule 10b5-1 Stock Trading Plan entered into by the Reporting Person on November 15, 2016. This exercise and sale of a total of 1,000 ordinary shares is pursuant to a Rule 10b5-1 Stock Trading Plan entered into by the Reporting Person on November 15, 2016. 6,950 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 500 on June 1, 2017; 500 on June 1, 2018; 500 on June 3, 2019; 500 on June 1, 2020; 625 on May 30, 2017; 625 on May 28, 2018; 625 on May 28, 2019; 750 on May 30, 2017; 750 on May 30, 2018; 450 on May 31, 2017; 375 on October 2, 2017; 375 on October 1, 2018 and 375 on October 1, 2019. This option to purchase 962 STERIS plc ordinary shares, which is fully vested, was received in the Merger in exchange for an option to purchase 962 STERIS Corporation common shares for $22.83 per share, subject to the same terms and conditions as the original STERIS Corporation stock option. This option to purchase 1,000 STERIS plc ordinary shares, which is fully vested, was received in the Merger in exchange for an option to purchase 1,000 STERIS Corporation common shares for $34.23 per share, subject to the same terms and conditions as the original STERIS Corporation stock option. /s/ Ronald E. Snyder, Authorized Representative under Power of Attorney 2017-01-18