STE STERIS plc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 3, 2025

STERIS plc

(Exact Name of Registrant as Specified in Charter)

Registrant’s telephone number, including area code: + 353 1 232 2000

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

On March 3, 2025, Isomedix Operations, Inc. (“Isomedix”), a subsidiary of STERIS plc (“STERIS” or the “Company”), entered into binding confidential term sheets with plaintiffs’ counsel (the “Term Sheets”), as well as settlement agreements with several plaintiffs currently scheduled for trial. The Term Sheets and the settlement agreements are expected to resolve substantially all of the claims for personal injury related to ethylene oxide (“EO”) that are currently pending in the Circuit Court of Cook County, Illinois.

Pursuant to the Term Sheets, Isomedix has entered into and expects to enter into additional agreements to pay up to $48,150,000 to settle claims. None of the term sheets nor any such agreements are an admission of liability or that emissions from the Waukegan, Illinois facility ever posed a safety hazard to the people who live or work in the surrounding areas.

Isomedix may exercise walkaway rights with respect to the claims covered by the Term Sheets if certain agreed terms are not fulfilled, including if a substantial majority of plaintiffs in such cases do not agree to settle or are disqualified under the applicable terms or the resulting settlements are ultimately not approved by the court. In the event it exercises its walkaway rights, Isomedix is prepared to continue to defend itself in the litigation and reserves all legal and factual defenses against such claims.

Pursuant to the Term Sheets, Isomedix will deposit the settlement funds into escrow with a mutually agreed upon escrow agent. The Term Sheets call for establishment of a claims administration process that includes guidelines and procedures for administering individual settlements, which process is expected to take up to 10 months to complete. The settlement will be funded with a mix of cash on hand and borrowings under the existing revolving credit facility. The Company will record a charge for the $48,150,000 million settlement for the fiscal year ended March 31, 2025, which will be excluded from STERIS’s fiscal 2025 adjusted earnings measures. Isomedix anticipates dismissal of all pending EO-related claims brought by the covered plaintiffs upon completion of the claims administration process and approval by the court.

Forward-Looking Statements

This Current Report may contain statements concerning certain trends, expectations, forecasts, estimates, or other forward-looking information affecting or relating to STERIS or its industry, products or activities that are intended to qualify for the protections afforded “forward-looking statements” under the Private Securities Litigation Reform Act of 1995 and other laws and regulations. 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. Many important factors could cause actual results to differ materially from those in the forward-looking statements including, without limitation, statements related to the expected benefits of and timing of completion of the Restructuring Plan, disruption of production or supplies, changes in market conditions, political events, pending or future claims or litigation, competitive factors, technology advances, actions of regulatory agencies, and changes in laws, government regulations, labeling or product approvals or the application or interpretation thereof. Many of these important factors are outside of STERIS’s control. No assurances can be provided as to any result or the timing of any outcome regarding matters described in STERIS’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. References to products are summaries only and should not be considered the specific terms of the product clearance or literature. Unless legally required, STERIS does 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. Other potential risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements include, without limitation, (a) the impact of public health crises on STERIS’s operations, supply chain, material and labor costs, performance, results, prospects, or value, (b) STERIS’s ability to achieve the expected benefits regarding the accounting and tax treatments of the redomiciliation to Ireland, (c) operating costs, Customer loss and business disruption (including, without limitation, difficulties in maintaining relationships with employees, Customers, clients or suppliers) being greater than expected, (d)

STERIS’s ability to successfully integrate acquired businesses into its existing businesses, including unknown or inestimable liabilities, impairments, or increases in expected integration costs or difficulties in connection with the integration of such businesses, (e) uncertainties related to tax treatments under the TCJA and the IRA, (f) the possibility that Pillar Two Model Rules could increase tax uncertainty and adversely impact STERIS’s provision for income taxes and effective tax rate and subject STERIS to additional income tax in jurisdictions who adopt Pillar Two Model Rules, (g) STERIS’s ability to continue to qualify for benefits under certain income tax treaties in light of ratification of more strict income tax treaty rules (through the MLI) in many jurisdictions where STERIS has operations, (h) changes in tax laws or interpretations that could increase our consolidated tax liabilities, including changes in tax laws that would result in STERIS being treated as a domestic corporation for United States federal tax purposes, (i) the potential for increased pressure on pricing or costs that leads to erosion of profit margins, including as a result of inflation, (j) the possibility that market demand will not develop for new technologies, products or applications or services, or business initiatives will take longer, cost more or produce lower benefits than anticipated, (k) the possibility that application of or compliance with laws, court rulings, certifications, regulations, or regulatory actions, including without limitation any of the same relating to FDA, EPA or other regulatory authorities, government investigations, the outcome of any pending or threatened FDA, EPA or other regulatory warning notices, actions, requests, inspections or submissions, the outcome of any pending or threatened litigation brought by private parties or other requirements or standards may delay, limit or prevent new product or service introductions, affect the production, supply and/or marketing of existing products or services, result in costs to STERIS that may not be covered by insurance, or otherwise affect STERIS’s performance, results, prospects or value, (l) the timing of any court approvals and other conditions of the settlement related to the Isomedix litigation, as well as uncertainties related to the claims administration process, including the level of participation by eligible plaintiffs and its expected timeframe, (m) the potential of international unrest, including the Russia-Ukraine or Israel-Hamas military conflicts, economic downturn or effects of currencies, tax assessments, tariffs and/or other trade barriers, adjustments or anticipated rates, raw material costs or availability, benefit or retirement plan costs, or other regulatory compliance costs, (n) the possibility of reduced demand, or reductions in the rate of growth in demand, for STERIS’s products and services, (o) the possibility of delays in receipt of orders, order cancellations, or delays in the manufacture or shipment of ordered products, due to supply chain issues or otherwise, or in the provision of services, (p) the possibility that anticipated growth, cost savings, new product acceptance, performance or approvals, or other results may not be achieved, or that transition, labor, competition, timing, execution, impairments, regulatory, governmental, or other issues or risks associated with STERIS’s businesses, industry or initiatives including, without limitation, those matters described in STERIS’s various securities filings, may adversely impact STERIS’s performance, results, prospects or value, (q) the impact on STERIS and its operations, or tax liabilities, of Brexit or the exit of other member countries from the EU, and the Company’s ability to respond to such impacts, (r) the impact on STERIS and its operations of any legislation, regulations or orders, including but not limited to any new trade or tax legislation (including CAMT and excise tax on stock buybacks), regulations or orders, that may be implemented by the U.S. administration or Congress, or of any responses thereto, (s) the possibility that anticipated financial results or benefits of recent acquisitions, of STERIS’s restructuring efforts, or of recent divestitures, including anticipated revenue, productivity improvement, cost savings, growth synergies and other anticipated benefits, will not be realized or will be other than anticipated, (t) the level of STERIS’s indebtedness limiting financial flexibility or increasing future borrowing costs, (u) rating agency actions or other occurrences that could affect STERIS’s existing debt or future ability to borrow funds at rates favorable to STERIS or at all, (v) the effects of changes in credit availability and pricing, as well as the ability of STERIS’s Customers and suppliers to adequately access the credit markets, on favorable terms or at all, when needed, and (w) the possibility that our expectations about the pre-tax savings resulting from the Restructuring Plan, the number of positions eliminated pursuant to the Restructuring Plan and the costs, charges and cash expenditures associated with the announced restructuring plan may not be realized on the timeline or timelines we expect, or at all.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: March 3, 2025