X0306 4 2018-05-31 0 0001624899 STERIS plc STE 0001532367 Bardwell Kathleen C/O RUTHERFORD HOUSE, STEPHENSONS WAY CHADDESDEN DERBY X0 DE21 6LY UNITED KINGDOM 0 1 0 0 Sr.V. P. & C.C.O. Ordinary Shares, 10 pence par value 2018-05-31 4 A 0 1572 0.00 A 17703 D Ordinary Shares, 10 pence par value 2018-06-01 4 F 0 150 104.57 D 17553 D Employee Stock Option (right to buy) 114.22 2018-05-31 4 A 0 9332 0.00 A 2028-05-31 Ordinary Shares 9332 9332 D All 1,572 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 393 on May 31, 2019; 393 on June 1, 2020; 393 on June 1, 2021 and 393 on May 31, 2022. 150 shares were withheld from the 500 restricted shares that vested on June 1, 2018. These 150 ordinary shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These 500 ordinary shares were awarded to Ms. Bardwell on June 1, 2016 as part of an award of 2,000 restricted shares. These vested shares were valued at the NYSE closing market price on June 1, 2017. The remaining restrictions on these ordinary shares lapse as follows: 500 on June 3, 2019 and 500 on June 1, 2020. 5,447 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 375 on October 1, 2018; 625 on May 28, 2019; 500 on May 30, 2019; 393 on May 31, 2019; 500 on June 3, 2019; 375 on October 1, 2019; 500 on June 1, 2020; 500 on June 1, 2020; 393 on June 1, 2020; 500 on June 1, 2021; 393 on June 1, 2021 and 393 on May 31, 2022. This option becomes exercisable as follows: 2,333 on May 31, 2019; 2,333 on June 1, 2020; 2,333 on June 1, 2021 and 2,333 on May 31, 2022. /s/ Ronald E. Snyder, Authorized Representative under Power of Attorney 2018-06-04