X0306 4 2018-05-30 0 0001624899 STERIS plc STE 0001235611 TOKICH MICHAEL J C/O RUTHERFORD HOUSE, STEPHENSONS WAY CHADDESDEN DERBY X0 DE21 6LY UNITED KINGDOM 0 1 0 0 Sr. Vice Pres., CFO Ordinary Shares, 10 pence par value 2018-05-30 4 F 0 1370 104.57 D 46218 D Ordinary Shares, 10 pence par value 2018-05-31 4 A 0 4240 0.00 A 50458 D Ordinary Shares, 10 pence par value 3369 I See Footnote Below. Employee Stock Option (right to buy) 114.22 2018-05-31 4 A 0 46664 0.00 A 2028-05-31 Ordinary Shares 46664 46664 D 1,370 shares were withheld from the 4,500 restricted shares that vested on May 30, 2018. These 1,370 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These 4,500 shares were awarded to Mr. Tokich on May 30, 2014 as part of an award of 4,500 restricted shares. These vested shares were valued at the NYSE closing market price on May 30, 2018. All 4,240 of these Common Shares are restricted. The restrictions on these Common Shares lapse as follows: 4,240 on May 31, 2022. 25,940 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 7,000 on May 28, 2019; 4,000 on October 1, 2019; 4,700 on June 1, 2020; 6,000 on June 1, 2021; and 4,240 on May 31, 2022. Units representing 3,369 ordinary share equivalents are held on behalf of the Reporting Person under the STERIS Corporation 401(k) Plan as of May 31, 2018. This option becomes exercisable as follows: 11,666 on May 31, 2019; 11,666 on June 1, 2020; 11,666 on June 1, 2021 and 11,666 on May 31, 2022. /s/ Ronald E. Snyder, Authorized Representative under Power of Attorney 2018-06-01