Sec Form 4 Filing - Tamaro Renato @ STERIS plc - 2021-10-01

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Tamaro Renato 2. Issuer Name and Ticker or Trading Symbol STERIS plc [ STE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) V.P. & Corporate Treasurer (Last) (First) (Middle) C/O 70 SIR JOHN ROGERSON'S QUAY 3. Date of Earliest Transaction (MM/DD/YY) 10/01/2021 (Street) DUBLIN, L22 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Ordinary Shares 10/01/2021 A 344 ( 1 ) A $ 0 5,716 ( 2 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Options (right to buy) $ 228.36 10/01/2021 A 1,892 ( 3 ) 10/01/2031 Ordinary Shares 1,892 $ 0 1,892 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Tamaro Renato C/O 70 SIR JOHN ROGERSON'S QUAY DUBLIN, L22 V.P. & Corporate Treasurer Signatures /s/ Ronald E. Snyder, Authorized Representative under Power of Attorney 10/05/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )All 344 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 258 on October 1, 2024 and 86 on October 1, 2025. ( 2 )2,544 of these ordinary shares are restricted. The restrictions on these ordinary shares lapse as follows: 484 on May 31, 2022; 556 on May 31, 2023; 584 on June 3, 2024; 432 on June 3, 2024; 258 on October 1, 2024; 144 on June 2, 2025 and 86 on October 1, 2025. ( 3 )This option becomes exercisable as follows: 473 on October 3, 2022; 473 on October 2, 2023; 473 on October 1, 2024 and 473 on October 1, 2025.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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