X0306 4 2017-05-30 0 0001624899 Steris plc STE 0001697095 Burton Karen L C/O CHANCERY HOUSE, 190 WATERSIDE RD. HAMILTON INDUSTRIAL PARK LEICESTER X0 LE5 1QZ UNITED KINGDOM 0 1 0 0 VP, Controller & CAO Ordinary Shares, 10 pence par value 2017-05-30 4 A 0 3000 0.00 A 11726 D Ordinary Shares, 10 pence par value 2017-05-31 4 F 0 419 77.56 D 11307 D Ordinary Shares, 10 pence par value 319 I See Footnote Below. Employee Stock Option (right to buy) 77.07 2017-05-30 4 A 0 4000 0.00 A 2027-05-30 Ordinary Shares 4000 4000 D All 3,000 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 3,000 on June 1, 2021. 419 shares were withheld from the 1,300 restricted shares that vested on May 31, 2017. These 419 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 1,300 ordinary shares were awarded to Ms. Burton on May 31, 2013. These vested shares were valued at the NYSE closing market price on May 31, 2017. 7,656 of these shares are restricted and vest as follows: 1,000 on April 2, 2018; 972 on May 30, 2018; 764 on May 28, 2019; 700 on October 1, 2019; 1,220 on June 1, 2020 and 3,000 on June 1, 2021. Units representing 319 ordinary share equivalents are held on behalf of the Reporting Person under the STERIS Corporation 401(k) Plan as of May 31, 2017. This option becomes exercisable as follows: 1,000 on May 30, 2018; 1,000 on May 30, 2019; 1,000 on June 1, 2020 and 1,000 on June 1, 2021. /s/ Ronald E. Snyder, Authorized Representative under Power of Attorney 2017-06-01