STERIS Announces Changes to Board of Directors David B. Lewis to retire at the Company s 2021 Annual Meeting of Shareholders Company appoints Paul E. Martin to Board DUBLIN, IRELAND (

STERIS Announces Changes to Board of Directors

David B. Lewis to retire at the Company s 2021 Annual Meeting of Shareholders

Company appoints Paul E. Martin to Board

DUBLIN, IRELAND (May 11, 2021) STERIS plc (NYSE: STE) ( STERIS or the Company ) today announced changes to its Board of

Directors. David Lewis, Board member since 2010 has announced that he will not stand for election when his term expires on July 29, 2021. In addition, effective May 5, 2021, Paul E. Martin, former Senior Vice President and Chief

Information Officer for Baxter International Inc., has been elected to the company s Board of Directors.

We are grateful for David s

long-term commitment to STERIS and will miss his unique perspective. We wish him all the best in his retirement, said Mohsen Sohi, Chairman of STERIS. We are pleased to welcome Paul to our Board of Directors. Paul is a seasoned

healthcare executive with crucial experience in IT. He will provide valuable insight to our Board.

Mr. Martin served as Senior Vice President

and Chief Information Officer for Baxter International Inc., a multinational healthcare company, from 2011 until his retirement in 2020. From 1999 to 2011, he held several senior management positions at Rexam plc (Rexam), a consumer packaging

manufacturing company based in the U.K., including Chief Information Officer. Prior to that, Mr. Martin held information technology leadership positions at CIT Group Inc., BNSF Railway Company and

Since 2017, Mr. Martin has served on the Board of Directors of Unisys Corporation and is

currently a member of its Audit and Finance Committee as well as the chair of its Security and Risk Committee. Early in 2021, he joined the Board of Directors of Ping Identity Holding Corp., a global provider of intelligent identity management

software solutions, and is currently a member of its Audit Committee. He also joined the Board of Directors of Owens Corning, where he serves on the Audit Committee and Finance Committee.

Mr. Martin graduated with a Bachelor s degree in Management Information Systems from Western Kentucky University.

As previously announced, Walt Rosebrough, STERIS President and CEO, will not be standing for re-election at the end of

his term, which also expires at the Company s Annual Meeting this summer. The combination of these changes, along with the recent addition of Dan Carestio, who is currently COO and the Board intends to appoint as CEO directly following the

Annual Meeting, will return the Board to nine members following the Annual Meeting on July 29, 2021.

STERIS s MISSION IS TO HELP OUR CUSTOMERS CREATE A HEALTHIER AND SAFER WORLD by providing innovative healthcare and life science products and services

around the globe. For more information, visit www.steris.com.

Julie Winter, Vice President, Investor Relations and Corporate Communications

Stephen Norton, Senior Director, Corporate

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

This press release and the referenced conference call may contain forward-looking statements within the meaning of the federal securities laws about STERIS.

Forward-looking statements speak only as to the date the statement is made and may be identified by the use of forward-looking terms such as may, will, expects, believes, anticipates,

plans, estimates, projects, targets, forecasts, outlook, impact, potential, confidence, improve, optimistic,

deliver, orders, backlog, comfortable, trend , and seeks, or the negative of such terms or other variations on such terms or comparable terminology. These forward-looking

statements are based on current expectations, estimates or forecasts about our businesses, the industries in which we operate and current beliefs and assumptions of management and are subject to uncertainty and changes in circumstances. Investors

should understand that these statements are not guarantees of performance or results. Many important factors could affect actual financial results and cause them to vary materially from the expectations contained in the forward-looking statements.

No assurances can be provided as to any result or the timing of any outcome regarding matters described in STERIS s or Cantel s securities filings or otherwise with respect to any regulatory action, administrative proceedings, government

investigations, litigation, warning letters, cost reductions, business strategies, earnings or revenue trends or future financial results. Unless legally required, we do not undertake to update or revise any forward-looking statements even if events

make clear that any projected results, express or implied, will not be realized. These risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements include, without limitation:

Investors are cautioned not

to place undue reliance on any forward-looking statements, which speak only as of the date they are made. We undertake no obligation to update or revise any forward-looking statement, whether as a result of new information, future developments or

otherwise, except as required by applicable law. This cautionary statement is applicable to all forward-looking statements contained herein and in the referenced conference call.