STE · STERIS plc

This option to purchase 3,781 STERIS plc ordinary shares, which is fully vested, was received in connection with the redomiciliation of STERIS plc to Ireland in March 2019 in exchange for an option to purchase 3,781 ordinary shares for $71.40 per share in STERIS plc prior to the redomiciliation ("Old STERIS"), subject to the same terms and conditions as the original Old STERIS stock option.

Net - Cashless Stock Option Exercise - Options to purchase 1,837 shares were surrendered to the Company for payment of the option price. Options surrendered were valued based on the Company stock closing market price on the NYSE on the day on which the Net - Cashless Stock Option Exercise occurred.

As of June 15, 2026, 8,239 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 1,453 on June 2, 2027; 1,252 on June 3, 2027; 1,376 on June 4, 2027; 1,453 on June 2, 2028; 1,252 on June 5, 2028 and 1,453 on June 4, 2029.

As of June 8, 2026, 39,893 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 7,912 on June 2, 2027; 5,937 on June 3, 2027; 4,283 on June 4, 2027; 7,912 on June 2, 2028; 5,937 on June 5, 2028 and 7,912 on June 4, 2029.

65 shares were withheld from the 221 restricted shares that vested on June 4, 2026. These 65 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 4, 2026.

As of June 8, 2026, 1,405 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 250 on June 2, 2027; 217 on June 3, 2027; 221 on June 4, 2027; 250 on June 2, 2028; 217 on June 5, 2028 and 250 on June 4, 2029.

1,889 shares were withheld from the 4,283 restricted shares that vested on June 4, 2026. These 1,889 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 4, 2026.

195 shares were withheld from the 542 restricted shares that vested on June 4, 2026. These 195 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 4, 2026.

As of June 8, 2026, 4,190 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 772 on June 2, 2027; 666 on June 3, 2027; 542 on June 4, 2027; 772 on June 2, 2028; 666 on June 5, 2028 and 772 on June 4, 2029.

150 shares were withheld from the 513 restricted shares that vested on June 4, 2026. These 150 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 4, 2026.

As of June 8, 2026, 3,972 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 733 on June 2, 2027; 630 on June 3, 2027; 513 on June 4, 2027; 733 on June 2, 2028; 630 on June 5, 2028 and 733 on June 4, 2029.

90 shares were withheld from the 306 restricted shares that vested on June 4, 2026. These 90 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 4, 2026.

As of June 8, 2026, 9,282 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 783 on October 1, 2026; 1,775 on June 2, 2027; 651 on June 3, 2027; 306 on June 4, 2027; 783 on October 1, 2027; 1,775 on June 2, 2028; 651 on June 5, 2028 and 783 on October 1, 2028 and 1,775 on June 4, 2029.

401 shares were withheld from the 1,376 restricted shares that vested on June 4, 2026. These 401 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 4, 2026.

As of June 8, 2026, 8,239 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 1,453 on June 2, 2027; 1,252 on June 3, 2027; 1,376 on June 4, 2027; 1,453 on June 2, 2028; 1,252 on June 5, 2028 and 1,453 on June 4, 2029.

600 shares were withheld from the 1,360 restricted shares that vested on June 4, 2026. These 600 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 4, 2026.

As of June 8, 2026, 5,359 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 1,003 on June 2, 2027; 835 on June 3, 2027; 680 on June 4, 2027; 1,003 on June 2, 2028; 835 on June 5, 2028 and 1,003 on June 4, 2029.

239 shares were withheld from the 666 restricted shares that vested on June 3, 2026. These 239 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 3, 2026.

As of June 3, 2026, 4,732 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 542 on June 4, 2026; 772 on June 2, 2027; 666 on June 3, 2027; 542 on June 4, 2027; 772 on June 2, 2028; 666 on June 5, 2028 and 772 on June 4, 2029.

311 shares were withheld from the 835 restricted shares that vested on June 3, 2026. These 311 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 3, 2026.

As of June 3, 2026, 6,719 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 1,360 on June 4, 2026; 1,003 on June 2, 2027; 835 on June 3, 2027; 680 on June 4, 2027; 1,003 on June 2, 2028; 835 on June 5, 2028 and 1,003 on June 4, 2029.

365 shares were withheld from the 1,252 restricted shares that vested on June 3, 2026. These 365 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 3, 2026.

As of June 3, 2026, 9,615 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 1,376 on June 4, 2026; 1,453 on June 2, 2027; 1,252 on June 3, 2027; 1,376 on June 4, 2027; 1,453 on June 2, 2028; 1,252 on June 5, 2028 and 1,453 on June 4, 2029.

184 shares were withheld from the 630 restricted shares that vested on June 3, 2026. These 184 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 3, 2026.

As of June 3, 2026, 4,485 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 513 on June 4, 2026; 733 on June 2, 2027; 630 on June 3, 2027; 513 on June 4, 2027; 733 on June 2, 2028; 630 on June 5, 2028 and 733 on June 4, 2029.

64 shares were withheld from the 217 restricted shares that vested on June 3, 2026. These 64 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 3, 2026.

As of June 3, 2026, 1,626 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 221 on June 4, 2026; 250 on June 2, 2027; 217 on June 3, 2027; 221 on June 4, 2027; 250 on June 2, 2028; 217 on June 5, 2028 and 250 on June 4, 2029.

2,619 shares were withheld from the 5,937 restricted shares that vested on June 3, 2026. These 2,619 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 3, 2026.

As of June 3, 2026, 44,176 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 4,283 on June 4, 2026; 7,912 on June 2, 2027; 5,937 on June 3, 2027; 4,283 on June 4, 2027; 7,912 on June 2, 2028; 5,937 on June 5, 2028 and 7,912 on June 4, 2029.

190 shares were withheld from the 651 restricted shares that vested on June 3, 2026. These 190 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 3, 2026.

As of June 3, 2026, 9,588 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 306 on June 4, 2026; 783 on October 1, 2026; 1,775 on June 2, 2027; 651 on June 3, 2027; 306 on June 4, 2027; 783 on October 1, 2027; 1,775 on June 2, 2028; 651 on June 5, 2028 and 783 on October 1, 2028 and 1,775 on June 4, 2029.

This option becomes exercisable as follows: 1,009 on June 2, 2027, 1,009 on June 2, 2028, 1,009 on June 4, 2029 and 1,009 on June 3, 2030.

As of June 2, 2026, 50,113 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 5,937 on June 3, 2026; 4,283 on June 4, 2026; 7,912 on June 2, 2027; 5,937 on June 3, 2027; 4,283 on June 4, 2027; 7,912 on June 2, 2028; 5,937 on June 5, 2028 and 7,912 on June 4, 2029.

329 shares were withheld from the 1,128 restricted shares that vested on June 2, 2026. These 329 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 3,117 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 588 on June 4, 2027; 576 on June 3, 2028; 798 on January 2, 2029 and 1,155 on June 4, 2029.

67 shares were withheld from the 2,140 restricted shares that vested on June 2, 2026. These 67 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 10,047 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 2,379 on June 4, 2027; 2,922 on June 5, 2028 and 4,746 on June 4, 2029.

This option becomes exercisable as follows: 2,020 on June 2, 2027, 2,020 on June 2, 2028, 2,020 on June 4, 2029 and 2,020 on June 3, 2030.

41 shares were withheld from the 141 restricted shares that vested on June 2, 2026. These 41 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 1,843 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 217 on June 3, 2026; 221 on June 4, 2026; 250 on June 2, 2027; 217 on June 3, 2027; 221 on June 4, 2027; 250 on June 2, 2028; 217 on June 5, 2028 and 250 on June 4, 2029.

This option becomes exercisable as follows: 655 on June 2, 2027, 655 on June 2, 2028, 655 on June 4, 2029 and 655 on June 3, 2030.

This option to purchase 3,781 STERIS plc ordinary shares, which is fully vested, was received in connection with the redomiciliation of STERIS plc to Ireland in March 2019 in exchange for an option to purchase 3,781 ordinary shares for $71.40 per share in STERIS plc prior to the redomiciliation ("Old STERIS"), subject to the same terms and conditions as the original Old STERIS stock option.

As of June 2, 2026, 10,867 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows:1,252 on June 3, 2026; 1,376 on June 4, 2026; 1,453 on June 2, 2027; 1,252 on June 3, 2027; 1,376 on June 4, 2027; 1,453 on June 2, 2028; 1,252 on June 5, 2028 and 1,453 on June 4, 2029.

As of June 2, 2026, 3,117 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 588 on June 4, 2027; 576 on June 3, 2028; 798 on January 2, 2029 and 1,155 on June 4, 2029.

127 shares were withheld from the 352 restricted shares that vested on June 2, 2026. These 127 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 5,398 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 666 on June 3, 2026; 542 on June 4, 2026; 772 on June 2, 2027; 666 on June 3, 2027; 542 on June 4, 2027; 772 on June 2, 2028; 666 on June 5, 2028 and 772 on June 4, 2029.

As of June 2, 2026, 10,047 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 2,379 on June 4, 2027; 2,922 on June 5, 2028 and 4,746 on June 4, 2029.

As of June 2, 2026, 10,239 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 651 on June 3, 2026; 306 on June 4, 2026; 783 on October 1, 2026; 1,775 on June 2, 2027; 651 on June 3, 2027; 306 on June 4, 2027; 783 on October 1, 2027; 1,775 on June 2, 2028; 651 on June 5, 2028 and 783 on October 1, 2028 and 1,775 on June 4, 2029.

Each Career Restricted Stock Unit represents the right to receive one STERIS ordinary share six months after the cessation of the Director's Board service.

These Career Restricted Stock Units are fully vested immediately. They will be settled in STERIS ordinary shares six months after the cessation of the Director's Board service.

As of June 2, 2026, 5,115 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 630 on June 3, 2026; 513 on June 4, 2026; 733 on June 2, 2027; 630 on June 3, 2027; 513 on June 4, 2027; 733 on June 2, 2028; 630 on June 5, 2028 and 733 on June 4, 2029.

995 shares were withheld from the 2,369 restricted shares that vested on June 2, 2026. These 995 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 50,113 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 5,937 on June 3, 2026; 4,283 on June 4, 2026; 7,912 on June 2, 2027; 5,937 on June 3, 2027; 4,283 on June 4, 2027; 7,912 on June 2, 2028; 5,937 on June 5, 2028 and 7,912 on June 4, 2029.

This option becomes exercisable as follows: 3,800 on June 2, 2027, 3,800 on June 2, 2028, 3,800 on June 4, 2029 and 3,800 on June 3, 2030.

As of June 2, 2026, 7,554 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 835 on June 3, 2026; 1,360 on June 4, 2026; 1,003 on June 2, 2027; 835 on June 3, 2027; 680 on June 4, 2027; 1,003 on June 2, 2028; 835 on June 5, 2028 and 1,003 on June 4, 2029.

66 shares were withheld from the 225 restricted shares that vested on June 2, 2026. These 66 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 10,239 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 651 on June 3, 2026; 306 on June 4, 2026; 783 on October 1, 2026; 1,775 on June 2, 2027; 651 on June 3, 2027; 306 on June 4, 2027; 783 on October 1, 2027; 1,775 on June 2, 2028; 651 on June 5, 2028 and 783 on October 1, 2028 and 1,775 on June 4, 2029.

This option becomes exercisable as follows: 4,641 on June 2, 2027, 4,641 on June 2, 2028, 4,641 on June 4, 2029 and 4,641 on June 3, 2030.

247 shares were withheld from the 846 restricted shares that vested on June 2, 2026. These 247 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 10,867 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows:1,252 on June 3, 2026; 1,376 on June 4, 2026; 1,453 on June 2, 2027; 1,252 on June 3, 2027; 1,376 on June 4, 2027; 1,453 on June 2, 2028; 1,252 on June 5, 2028 and 1,453 on June 4, 2029.

This option becomes exercisable as follows: 1,917 on June 2, 2027, 1,917 on June 2, 2028, 1,917 on June 4, 2029 and 1,917 on June 3, 2030.

591 shares were withheld from the 2,028 restricted shares that vested on June 2, 2026. These 591 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 7,554 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 835 on June 3, 2026; 1,360 on June 4, 2026; 1,003 on June 2, 2027; 835 on June 3, 2027; 680 on June 4, 2027; 1,003 on June 2, 2028; 835 on June 5, 2028 and 1,003 on June 4, 2029.

66 shares were withheld from the 225 restricted shares that vested on June 2, 2026. These 66 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These vested shares were valued at the NYSE closing market price on June 2, 2026.

As of June 2, 2026, 5,115 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 630 on June 3, 2026; 513 on June 4, 2026; 733 on June 2, 2027; 630 on June 3, 2027; 513 on June 4, 2027; 733 on June 2, 2028; 630 on June 5, 2028 and 733 on June 4, 2029.

This option becomes exercisable as follows: 4,137 on June 2, 2027, 4,137 on June 2, 2028, 4,137 on June 4, 2029 and 4,137 on June 3, 2030.

Price reflects a weighted average sale price for multiple transactions ranging from $209.50 to $209.53 per share, inclusive. The Reporting Person undertakes to provide, upon request by the SEC Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

As of June 2, 2026, 5,398 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 666 on June 3, 2026; 542 on June 4, 2026; 772 on June 2, 2027; 666 on June 3, 2027; 542 on June 4, 2027; 772 on June 2, 2028; 666 on June 5, 2028 and 772 on June 4, 2029.

As of June 2, 2026, 1,843 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 217 on June 3, 2026; 221 on June 4, 2026; 250 on June 2, 2027; 217 on June 3, 2027; 221 on June 4, 2027; 250 on June 2, 2028; 217 on June 5, 2028 and 250 on June 4, 2029.

This option becomes exercisable as follows: 20,685 on June 2, 2027, 20,685 on June 2, 2028, 20,685 on June 4, 2029 and 20,685 on June 3, 2030.