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STERIS plc

For the period ended Mar 31, 2026. Filed May 29, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2026 · Filed May 29, 2026

STE$257.12+0.1%Stored close · as of Nov 10, 2026

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Contents

Report of Independent Registered Public Accounting Firm (PCAOB ID:

To the Shareholders and the Board of Directors of STERIS plc

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of STERIS plc and subsidiaries (the Company) as of March 31, 2026 and 2025, the related consolidated statements of income, comprehensive income (loss), shareholders' equity and cash flows for each of the three years in the period ended March 31, 2026, and the related notes and financial statement schedule listed in the Index at Item 15(a) (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at March 31, 2026 and 2025, and the results of its operations and its cash flows for each of the three years in the period ended March 31, 2026, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of March 31, 2026, based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated May 29, 2026 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Description ofthe MatterUncertain Tax PositionsAs discussed in Note 10 to the consolidated financial statements, the Company received two notices of deficiency from the U.S. Internal Revenue Service (the “IRS”) regarding deemed dividend inclusions and associated withholding tax for fiscal year 2018. The IRS adjustments would result in a cumulative tax liability of approximately $50.0 million, excluding any interest and penalties, if ultimately assessed. The Company believes it is more-likely-than-not that they will be able to sustain the tax benefit recognized in the U.S. and has not recorded a liability for an uncertain tax position related to this matter.Auditing management’s analysis of tax positions related to the lack of deemed dividend inclusions and associated withholding tax for fiscal year 2018 was challenging as the analysis is highly judgmental due to complex interpretations of tax laws and legal rulings. In addition, periodic reassessment is required to evaluate changes impacting these tax positions, including regulatory changes, litigation and examination activity.
How WeAddressed theMatter in Our AuditWe obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s accounting process for uncertain tax positions. For example, we tested controls over management’s identification of uncertain tax positions and its application of the recognition and measurement principles, including management’s review of the facts and circumstances, including current year developments, and the corresponding tax laws relied upon to conclude that it is currently more-likely-than-not that they will realize the benefit recorded.Our audit procedures included, among others, assessing the Company's correspondence with the relevant tax authorities related to current year developments. With the assistance of our income tax professionals, we evaluated evidence of the status of the dispute with the IRS, including inquiries of and written representations from management and correspondence with external counsel engaged in the matter. We also evaluated the adequacy of the Company's disclosures included in Note 10 to the consolidated financial statements in relation to the matter.

We have served as the Company’s auditor since 1989.

/s/Ernst & Young LLP

Cleveland, Ohio

May 29, 2026

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