X0306 4 2018-05-29 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 2018-05-29 4 F 0 181 103.97 D 16505 D Ordinary Shares, 10 pence par value 2018-05-30 4 F 0 224 104.57 D 16281 D Ordinary Shares, 10 pence par value 2018-05-30 4 F 0 150 104.57 D 16131 D 181 shares were withheld from the 625 restricted shares that vested on May 29, 2018. These 181 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 625 ordinary shares were awarded to Ms. Bardwell on August 10, 2015 as part of an award of 2,500 restricted shares. These vested shares were valued at the NYSE closing market price on May 29, 2018. The remaining restrictions on these ordinary shares lapse as follows: 625 on May 28, 2019. 224 shares were withheld from the 750 restricted shares that vested on May 30, 2018. These 224 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 750 ordinary shares were awarded to Ms. Bardwell on May 30, 2014 as part of an award of 3,000 restricted shares. These vested shares were valued at the NYSE closing market price on May 30, 2018. 150 shares were withheld from the 500 restricted shares that vested on May 30, 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 May 30, 2017 as part of an award of 2,000 restricted shares. These vested shares were valued at the NYSE closing market price on May 30, 2018. The remaining restrictions on these ordinary shares lapse as follows: 500 on May 30, 2019; 500 on May 30, 2020 and 500 on May 30, 2021. 4,375 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 500 on June 1, 2018; 375 on October 1, 2018; 625 on May 28, 2019; 500 on May 30, 2019; 500 on June 3, 2019; 375 on October 1, 2019; 500 on June 1, 2020; 500 on June 1, 2020 and 500 on June 1, 2021. /s/ Ronald E. Snyder, Authorized Representative under Power of Attorney 2018-05-31