X0306 4/A 2018-05-30 2018-05-31 0 0001624899 STERIS plc STE 0001413087 Rosebrough Walter M Jr C/O RUTHERFORD HOUSE, STEPHENSONS WAY CHADDESDEN DERBY X0 DE21 6LY UNITED KINGDOM 1 1 0 0 President & CEO Ordinary Shares, 10 pence par value 2018-05-30 4 F 0 1934 104.57 D 50639 D Ordinary Shares, 10 pence par value 2018-05-30 4 F 0 1835 104.57 D 48804 D 1,934 shares were withheld from the 4,250 restricted shares that vested on May 30, 2018. These 1,934 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 4,250 ordinary shares were awarded to Mr. Rosebrough on May 30, 2014 as part of an award of 17,000 restricted shares. These vested shares were valued at the NYSE closing market price on May 30, 2018. The reporting of this transaction is being amended to reflect the correct number of shares withheld for taxes. 1,835 shares were withheld from the 4,000 restricted shares that vested on May 30, 2018. These 1,835 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 4,000 ordinary shares were awarded to Mr. Rosebrough on May 30, 2017 as part of an award of 16,000 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: 4,000 on May 30, 2019; 4,000 on May 30, 2020; and 4,000 on May 30, 2021. These 48,804 ordinary shares are held by the Reporting Person as Trustee of a revocable trust established for his benefit. 29,668 of these Ordinary Shares are restricted. The restrictions on the restricted Ordinary Shares lapse as follows: 4,681 on June 1, 2018; 3,625 on May 28, 2019; 4,000 on May 30, 2019; 4,681 on June 3, 2019; 4,681 on June 1, 2020; 4,000 on June 1, 2020 and 4,000 on June 1, 2021. /s/ Ronald E. Snyder, Authorized Representative under Power of Attorney 2018-06-01