Steris 10-K 2026-03-31

United States Securities and Exchange Commission

Washington, D. C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended March 31, 2026

OR

Commission file number 001-38848

STERIS plc

(Exact name of registrant as specified in its charter)

353 1 232 2000

(Registrant’s telephone number, including area code)

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes x No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes o No x

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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. o

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. o

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No x

The aggregate market value of Ordinary Shares held by non-affiliates of the registrant as of September 30, 2025 was $24,222.3 million.

The number of Ordinary Shares outstanding as of May 27, 2026: 97,602,485

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Proxy Statement for the 2026 Annual Meeting – Part III

Table of Contents

PART I

Throughout this Annual Report, STERIS plc and its subsidiaries together are called "STERIS," "the Company," "we," "us," or "our," unless otherwise noted. References in this Annual Report to a particular "year," "fiscal," "fiscal year," or "year-end" mean our fiscal year, which ends on March 31. For example, fiscal year 2026 ended on March 31, 2026.

INTRODUCTION

STERIS is a leading global provider of products and services that support patient care with an emphasis on infection prevention. WE HELP OUR CUSTOMERS CREATE A HEALTHIER AND SAFER WORLD by providing innovative healthcare and life science products and services around the globe. We offer our Customers a unique mix of innovative products and services. These include: consumable products, such as detergents, endoscopy accessories, barrier products, instruments and tools; services, including equipment installation and maintenance, microbial reduction of medical devices, instrument and scope repair, laboratory testing, and outsourced reprocessing; capital equipment, such as sterilizers, surgical tables, and automated endoscope reprocessors; and connectivity solutions such as operating room (“OR”) integration.

We operate and report our financial information in three reportable business segments: Healthcare, Applied Sterilization Technologies ("AST"), and Life Sciences. Previously, we had four reportable business segments; however, as a result of the fiscal 2025 divestiture of our Dental segment, Dental is presented as discontinued operations. Historical information has been retrospectively adjusted to exclude discontinued operations for comparability, as required. For more information, refer to Note 4 to our consolidated financial statements titled, "Discontinued Operations." Non-allocated operating costs that support the entire Company and items not indicative of operating trends are excluded from segment operating income. We describe our business segments in the section that follows, titled "Information Related to Business Segments" and Note 13 to our consolidated financial statements titled, "Business Segment Information."

The bulk of our revenues are derived from healthcare, medical device and pharmaceutical Customers. Much of the growth in these industries is driven by the aging of the population throughout the world, as an increasing number of individuals are entering their prime healthcare consumption years, and is dependent upon advancement in healthcare delivery, acceptance of new technologies, government policies, and general economic conditions.

In addition, there is increased demand for medical procedures, including preventive screenings such as endoscopies and colonoscopies; and a desire by our Customers to operate more efficiently, all of which are driving increased demand for many of our products and services.

INFORMATION RELATED TO BUSINESS SEGMENTS

Our chief operating decision maker is our President and Chief Executive Officer (“CEO”). The CEO is responsible for performance assessment and resource allocation. The CEO regularly receives discrete financial information about each reportable segment and uses this information to assess performance and allocate resources. The accounting policies of the reportable segments are the same as those described in Note 1 to our consolidated financial statements titled, “Nature of Operations and Summary of Significant Accounting Policies,” of this Annual Report.

HEALTHCARE SEGMENT

Description of Busi****ness. Our Healthcare segment provides a comprehensive offering for healthcare providers worldwide, focused on sterile processing departments and procedural centers, such as operating rooms and endoscopy suites. Our products and services range from infection prevention consumables and capital equipment, as well as services to maintain that equipment, to the repair of re-usable procedural instruments, to outsourced instrument reprocessing services. In addition, our procedural products also include endoscopy accessories, instruments, and capital equipment infrastructure used primarily in operating rooms, ambulatory surgery centers, endoscopy suites, and other procedural areas.

Products Offered. Our products include cleaning chemistries and sterility assurance products, automated endoscope reprocessing systems and tracking products, endoscopy accessories, instruments, washers, sterilizers and other pieces of capital equipment essential to the operations of a sterile processing department and equipment used directly in the procedure rooms, including surgical tables, lights, equipment management services, and connectivity solutions.

Services Offered. Our Healthcare segment service employees install, maintain, upgrade, repair, and troubleshoot capital equipment throughout the world. We offer various preventive maintenance programs and repair services to support the effective operation of capital equipment over its lifetime. Our Healthcare segment also provides comprehensive instrument, devices, and endoscope repair and maintenance services (on-site or at one of our dedicated facilities), custom process improvement consulting and outsourced instrument sterile processing (on-site at the hospital and in off-site reprocessing centers).

Customer Concentration. Our Healthcare segment sells consumables, services and capital equipment to Customers in many countries throughout the world. For the year ended March 31, 2026, no Customer represented more than 10% of the Healthcare segment's total revenues.

Competition. We compete with a number of large companies that have significant product portfolios and global reach, as well as a number of small companies with very limited product offerings and operations in one or a limited number of countries. On a product basis, competitors include 3M, Baxter, Boston Scientific, Belimed, Ecolab, Fortive, Getinge, Karl Storz, Olympus, Ruhof, SteelCo, Stryker, Skytron and Wassenburg. On a service line basis, competitors include BBraun, Crothall, Olympus and Pentax.

AST SEGMENT

Description of Business. Our AST segment supports medical device and pharmaceutical manufacturers through a global network of contract sterilization and laboratory testing facilities, and integrated sterilization equipment and control systems. Our technology-neutral offering supports Customers every step of the way, from testing through sterilization.

Services Offered. We offer a wide range of sterilization modalities and an array of testing services that complement the manufacturing of single-use, sterile products. Our facilities are located in regions with a concentration of medical device and pharmaceutical manufacturing throughout the Americas, Europe, and Asia. Our technical professionals support Customers in all phases of product development, materials testing, and process validation. Our AST segment also provides service support to our global installed base of integrated sterilization equipment and control systems, including installation, preventive maintenance, updates, repairs, and troubleshooting.

Products Offered. We support Customers with process controls and monitoring systems, and integrated sterilization equipment, including accelerators, product handling, and automation.

Customer Concentration. Our AST segment’s services are offered to Customers throughout the world. For the year ended March 31, 2026, no Customer represented more than 10% of the segment’s revenues.

Competition. AST operates in a highly regulated industry and competes with Sterigenics, other smaller contract sterilization companies, other manufacturers of sterilization equipment and control systems, and manufacturers that sterilize products in-house.

LIFE SCIENCES SEGMENT

Description of Business. Our Life Sciences segment provides a comprehensive offering of products and services designed to support biopharmaceutical and medical device manufacturing facilities, in particular those focused on aseptic manufacturing. Our portfolio includes a full suite of consumable products, equipment maintenance, specialty services, and capital equipment.

Products Offered. Our products include pharmaceutical detergents, cleanroom disinfectants and sterilants, pharmaceutical grade and research sterilizers and washers, sterility assurance and maintenance products, vaporized hydrogen peroxide room decontamination systems and sterilizers, and high purity water and pure steam generators.

Services Offered. Our Life Sciences segment service employees install, maintain, upgrade, repair, and troubleshoot equipment throughout the world. We offer various preventive maintenance programs and repair services to support the effective operation of capital equipment over its lifetime.

Customer Concentration. Our Life Sciences segment sells consumables, services and capital equipment to Customers globally. For the year ended March 31, 2026, no Customer represented more than 10% of the Life Sciences segment’s total revenues.

Competition. Our Life Sciences segment operates in highly regulated environments where the most intense competition results from technological innovations, product performance, convenience and ease of use, and overall cost-effectiveness. We compete for pharmaceutical Customers with a number of large companies that have significant product portfolios and global reach, as well as a number of small companies with very limited product offerings and operations in one or a limited number of countries. Competitors include Belimed, Contec, Ecolab, Fedegari, Getinge, and Stilmas.

INFORMATION WITH RESPECT TO OUR BUSINESS IN GENERAL

Sources and Availability of Raw Materials. We purchase raw materials, sub-assemblies, components, and other supplies needed in our operations from numerous suppliers in the United States and internationally. These raw materials and supplies are generally available from several suppliers and in sufficient quantities. We have long-term supply contracts for certain materials for which there are few suppliers, or those that are single-sourced in certain regions of the world, such as ethylene oxide ("EO") and radioisotope cobalt-60 ("cobalt-60"), which are necessary to our AST operations. In addition, we continue to expand our irradiation processing capacity with accelerator-based technologies, in order to help mitigate the potential cobalt-60 supply risk.

Intellectual Property. We protect our technology and products by, among other means, obtaining United States and foreign patents. There can be no assurance, however, that any patent will provide adequate protection for the technology, system, product, service, or process it covers. In addition, the process of obtaining and protecting patents can be long and expensive. We also rely upon trade secrets, technical know-how, and continuing technological innovation to develop and maintain our competitive position.

As of March 31, 2026, we held 606 United States patents and 2,402 patents in other jurisdictions and had 94 United States patent applications and 235 patent applications pending in other jurisdictions. Patents for individual products extend for varying periods according to the date of filing or grant and legal term of patents in various countries where a patent is obtained. The actual protection a patent provides varies from country to country and depends in part upon the type of patent, the scope of its coverage, and the availability of legal remedies in each country.

Our products are sold around the world under various brand names and trademarks. We consider our brand names and trademarks to be valuable in the marketing of our products. As of March 31, 2026, we had a total of approximately 2,079 trademark registrations worldwide.

Quality Assurance. We manufacture, assemble, and package products in several countries. Each of our production facilities is dedicated to particular processes and products. Our success depends upon Customer confidence in the quality of our production process and the integrity of the data that supports our product safety and effectiveness. We have implemented a harmonized, global Quality Management System to support the quality and integrity of scientific information and production processes.

We are subject to strict regulatory compliance and quality standards to ensure the safety and supply of our products and services. The STERIS quality system is scoped and designed to achieve quality from incoming materials through the design, development, manufacture, storage, handling and distribution of our products and delivery of services. To monitor compliance with these standards, internal and third-party assessments of our quality and regulatory systems are conducted. FDA and Regulatory Authorities worldwide periodically conduct inspections of our manufacturing and contract sterilization facilities to confirm compliance. In connection with an inspection, the FDA may initiate enforcement actions, e.g., warning letters, consent decrees, sanctions, injunctions, etc., beyond inspectional findings. In fiscal 2026, STERIS was not the subject of any FDA or Regulatory Authority enforcement actions. Additionally, STERIS had zero products listed in the FDA’s MedWatch Safety Alerts for Human Medical Products database.

We have in place processes to monitor and support compliance with product and service regulations worldwide, including design controls, product changes, labeling and advertising, marketing materials, good manufacturing practices, and adverse event reporting requirements. We take prompt action whenever we are alerted to regulatory or field-safety issues with a STERIS product. Following immediate assessment, we take corrective action, including voluntary product recalls, when needed. We examine underlying issues and root cause and work to resolve these to avoid recurrence. STERIS had no Class I recalls in fiscal 2026, 2025 or 2024.

Continuous Improvement. Continuous improvement is fundamental to how we operate at STERIS. We apply Lean principles across manufacturing, service operations, back office, and support functions through our Improvement framework. Our Improvement framework establishes a consistent foundation for problem solving, standard work, and performance management while enabling local ownership, creativity, and innovation. We assess system maturity and opportunity for improvement across core dimensions—including culture, training and development, routine management and strategic alignment, 5S, value stream mapping, kaizen management, integration with new product development ("NPD"), and key performance indicators.

Our efforts are designed to deliver better outcomes for Customers, Shareholders, and Associates. By targeting key areas, we strengthen performance, agility, and value. In manufacturing and service operations, we apply flow and cellular production concepts and cross-train Associates to increase flexibility and throughput. We also assess opportunities to in-source, outsource, or adopt technology to drive value.

We extend these principles to back office and support functions where Improvement tools streamline workflows, reduce waste, and improve service delivery.

A dedicated Continuous Improvement team partners with the business to coach, build capability, and accelerate results. Through kaizen events, tiered daily management, and natural work team initiatives, we foster a culture where Associates are empowered to drive change. This mindset is supported at all levels of the Company, reinforcing alignment, engagement, and sustainable long-term performance.

Government Regulation. Our business is subject to various degrees of governmental regulation in the countries in which we operate. In the United States, the Food and Drug Administration (“FDA”), the Environmental Protection Agency (“EPA”), the Occupational Safety and Health Administration ("OSHA"), the Nuclear Regulatory Commission ("NRC"), and other governmental authorities regulate the development, manufacture, sale, and distribution of our products and services. Our international operations are subject to a broad range of government regulations across multiple jurisdictions, including country-specific rules and regulations and U.S. regulations applicable to our international operations. Government regulations require detailed inspection of, and controls over, research and development, clinical investigations, product approvals and manufacturing, marketing and promotion, sampling, distribution, record-keeping, storage, and disposal practices.

Compliance with applicable regulations involves significant ongoing expense. Past, current or future regulations, their interpretation, or their application could have a material adverse impact on our operations. Also, additional governmental regulation may be passed that could prevent, delay, revoke, or result in the rejection of regulatory clearance of our products. We cannot predict the effect on our operations resulting from current or future governmental regulation or the interpretation or application of these regulations.

If we fail to comply with any applicable regulatory requirements, penalties could be imposed on us. For more information about the risks we face regarding regulatory requirements, see Part I, Item 1A of this Annual Report titled, "Risk Factors." We are subject to extensive regulatory requirements and must receive and maintain regulatory clearance or approval for many products and operations. Failure to receive or maintain, or delays in receiving, clearance or approvals may hurt our revenues, profitability, financial condition, or value.

In the past, we have received warning letters, paid civil penalties, conducted product recalls and field corrections, and been subject to other regulatory penalties. We believe that we are currently compliant in all material respects with applicable regulatory requirements. However, there can be no assurance that future or current regulatory, governmental, or private action will not have a material adverse effect on us or on our performance, results, or financial condition.

Environmental Matters. We are subject to various laws and governmental regulations concerning environmental matters and employee safety and health in Ireland, the United States and other countries. We have made, and continue to make, significant investments to comply with these laws and regulations. We cannot predict the future capital expenditures or operating costs required to comply with environmental laws and regulations. We believe that we are currently compliant with applicable environmental, health, and safety requirements in all material respects. However, there can be no assurance that future or current regulatory, governmental, or private action will not have a material adverse effect on our performance, results, or financial condition. Please refer to Note 12 to our consolidated financial statements titled, "Commitments and Contingencies" for further information.

In the future, if a loss contingency related to environmental matters, employee safety, health or conditional asset retirement obligations which is estimable and probable is significantly greater than the current recorded amount, we would record an additional liability for the obligation and it may result in a material impact on net income for the annual or interim period during which the liability is recorded. The investigation and remediation of environmental obligations generally occur over an extended period of time, and therefore we do not know if these events would have a material adverse effect on our financial condition, liquidity, or cash flow, nor can there be any assurance that such liabilities would not have a material adverse effect on our performance, results, or financial condition.

Competition. The markets in which we operate are highly competitive and generally highly regulated. Competition is intense in all of our business segments and includes many large and small competitors. Brand, design, quality, safety, ease of use, serviceability, price, product features, warranty, delivery, service, and technical support are important competitive factors to us. We expect to face continued competition in the future as new infection prevention, sterile processing, contamination control, gastrointestinal and surgical support products and services enter the market. We believe many organizations are working with a variety of technologies and sterilizing agents.

We believe that our long-term competitive position depends on our success in discovering, developing, and marketing innovative, cost-effective products and services. We devote significant resources to research and development efforts, and we believe STERIS is positioned as a global competitor in the search for technological innovations. In addition to research and development, we invest in quality control, Customer training programs, distribution systems, technical services, and other information services. In addition to organic opportunities, acquisitions are a key part of our long-term strategy for growth.

There can be no assurance that we will develop significant new products or services, or that the new products or services we provide or develop in the future will be more commercially successful than those provided or developed by our competitors. In addition, some of our existing or potential competitors may have greater resources than us. Therefore, a competitor may succeed in developing and commercializing products more rapidly than we do. Competition, as it relates to our business segments and product categories, is discussed in more detail in the section above titled, “Information Related to Business Segments.”

Methods of Distribution. Sales and service activities are supported by a staff of regionally based clinical specialists, system planners, corporate account managers, and in-house Customer service and field support departments. We also contract with distributors and dealers.

Customer training is important to our business. We provide a variety of courses at Customer locations, at our training and education centers, and over the internet. Our training programs help Customers understand the science, technology, and operation of our products and services. Many of our operator training programs are approved by professional certifying organizations and offer continuing education credits to eligible course participants.

Seasonality. Our financial results have, from time to time, exhibited seasonal patterns. In particular, capital equipment revenues within our Healthcare segment have historically been higher in the fourth quarter of our fiscal year. However, we cannot guarantee that these patterns will persist.

Backlog. We define backlog as the amount of unfilled capital equipment purchase orders at a point in time. At March 31, 2026, we had a backlog of $490.7 million. Of this amount, $392.1 million and $98.7 million related to our Healthcare and Life Sciences segments, respectively. At March 31, 2025, we had backlog orders of $452.9 million. Of this amount, $369.2 million and $83.7 million related to our Healthcare and Life Sciences segments, respectively. Backlog increased in fiscal 2026 due to the timing of shipments and the benefit of acquisitions.

Availability of Securities and Exchange Commission Filings. We make available free of charge on or through our website our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K, and amendments to these reports, as soon as reasonably practicable after we electronically file such material with, or furnish such material to, the Securities and Exchange Commission (“SEC”). You may access these documents, as well as other SEC filings related to the Company, on the Investor Relations page of our website at http://www.steris-ir.com. You may also obtain copies of these documents by accessing the SEC’s website at http://www.sec.gov. The content on or accessible through any website referred to in this Annual Report on Form 10-K is not incorporated by reference into this Form 10-K unless expressly noted.

We also make available free of charge on our website our Corporate Governance Guidelines, our Director Code of Ethics, and our Code of Business Conduct, as well as the Charters of the Audit Committee, the Compensation and Organization Development Committee, the Nominating and Governance Committee, and the Compliance and Technology Committee of the Company’s Board of Directors.

CORPORATE RESPONSIBILITY

Our Corporate Responsibility function is led by the Vice President of Corporate Responsibility & Safety. The Corporate Responsibility function, with support from our CEO, General Counsel and other senior executives, works to actively develop and refine our Environmental, Social and Governance ("ESG") strategies, programs, and policies. The Corporate Responsibility function works closely with our Global Sustainability Steering Committee to build ESG values and implement strategies, programs, and policies across the Company. The Global Sustainability Steering Committee is a cross-functional team of senior leadership, subcommittee chairs, and subject matter experts spanning our businesses and Legal, Investor Relations, Continuous Improvement, Compliance, Facilities, and Health, Safety and Environment functions. The Corporate Responsibility team regularly updates the Nominating and Governance Committee of our Board of Directors regarding its activities, including evaluating carbon emissions, preparing for regulatory requirements, reporting ESG metrics, and reviewing ESG ratings.

Key performance indicators and metrics have been established for those areas we believe to be relevant and potentially significant to our business. Certain of these disclosures relate to Sustainability Accounting Standards Board ("SASB") Standards for Medical Equipment & Supplies that we have identified to be closely aligned with our business. Our reporting against the SASB Standards is a voluntary disclosure aligned with our focus on financial materiality. We seek to provide investors with useful, relevant and meaningful sustainability information and have selected metrics under the SASB Standards. We describe below how we continuously monitor and track our policies and activities in the areas of ethical business practices, energy and environmental conservation, employees and human capital management, and quality.

ETHICAL BUSINESS PRACTICES

Code of Business Conduct. Our Code of Business Conduct sets the standard for legal and ethical behavior, addressing topics such as bribery and corruption, supply chain transparency, proper behavior in the workplace, and avoiding conflicts of interest.

Anti-Bribery and Anti-Corruption. We are committed to conducting our business fairly, honorably, with integrity and in compliance with the law in all jurisdictions where we operate. Our policy prohibits bribery and corruption in any form, and we explain our commitment in our Statement on Anti-Corruption Policies and Procedures. As an ongoing due diligence measure, we have established a program to recognize those sales and marketing intermediaries who demonstrate an elevated commitment to compliance. Through this Commercial Compliance Program, we acknowledge organizations that have not only met STERIS's standard ethical requirements for inclusion in our network but have also taken additional steps, such as adopting their own code of conduct and training their employees on their own firm's ethical values, to ensure compliant behavior. In fiscal 2026, STERIS incurred no monetary losses as a result of legal proceedings associated with bribery or corruption.

We regularly assess the risks associated with our business, including the risk of potential corruption or bribery in the environments where we do business, and we have designed our management systems to respond accordingly. As part of our anti-corruption program, our employees and third-party intermediaries are subject to mandatory comprehensive anti-bribery and anti-corruption training online. The training covers the various forms that corruption can take, red flags, and individuals’ roles in our anti-bribery and anti-corruption efforts.

In accordance with our policy, we engage a third-party due diligence firm to perform background checks, including bribery and corruption, before entering into commercial relationships with sales and marketing intermediaries, and other service providers. We communicate our bribery and corruption policies and expectations to our officers, Directors, employees, and sales and marketing intermediaries. It is the expectation of the Company that all of the aforementioned individuals comply with the requirements set forth in our policy and relevant rules and regulations.

Supplier Code of Conduct. Our expectations for ethical behavior extend beyond STERIS to our Suppliers as well. Our Supplier Code of Conduct defines the minimum requirements and expectations for all Suppliers and their subcontractors. Suspicions of supplier non-compliance are promptly investigated and addressed. We believe in conducting business with integrity and honesty and in accordance with all applicable laws and regulations of the countries in which we operate. We expect our suppliers to comply with the laws of the countries in which they operate, including but not limited to the European Union Customs Code, the EU Restriction of Hazardous Substances Directive, the UK Modern Slavery Act, the US Foreign Corrupt Practices Act, the UK Bribery Act, the US Dodd-Frank Conflict Minerals Rules, applicable data privacy laws, and all applicable local labor and employment laws.

Conflict Minerals Sourcing Policy. We file reports with the SEC disclosing our use of tin, tantalum, tungsten, and gold ("conflict minerals" or "3TG") in products sold anywhere in the world. In accordance with these legal requirements and as a part of the overall commitment to responsible sourcing, we are working with our suppliers to ensure transparency to the smelter/refining source for 3TG materials used in our products. Furthermore, we seek to identify the countries of origin of the 3TG in our products and the smelter/refiners that process the 3TG in our products. We undertake this effort to promote responsible sourcing. Because of our general downstream position in the supply chain, we rely on our suppliers for information. We expect suppliers to respond to our requests for complete transparency about the sources whose 3TG materials are used in our products and to conduct due diligence measures to ensure the information provided is accurate, up-to-date and complete. This Policy applies to all suppliers of products and materials to the Company and to all our affiliates. We will consider taking various progressive actions with respect to suppliers who do not make reasonable efforts to cooperate with our requests for information or requests to take corrective actions to enable us to identify smelters and refiners in our supply chains.

Managing Risk, Compliance and Ethics. We have an Enterprise Risk Management process ("ERM") to manage risk, which is led by our Chief Compliance and Quality Officer. Identifying and managing key risks to our business operations are essential to our future growth, profitability, and successful execution of strategic plans. We are committed to understanding and managing these risks through a consistent approach to risk assessment, monitoring, reporting, and mitigation. Key management sponsors are responsible for participating in the risk assessment process, including a periodic review with the Board of Directors. The objective of ERM is to identify key risks, the potential impacts of control failures with compliance implications, identify key mitigating activities, develop potential improvements for managing the risks, and to ensure execution of oversight activities on a monthly, annual or as needed basis.

We require all employees to be lawful and ethically responsible in all business practices. We expect all employees to comply with all Company policies, applicable laws, and the principles outlined in our Code of Business Conduct.

Using the STERIS Integrity Helpline or Webline, employees can anonymously report potential Code of Conduct concerns. A management Ethics Committee meets monthly to monitor and investigate reports of Code of Business Conduct violations and provides quarterly reporting to the Board of Directors' Compliance and Technology Committee. With respect to financial matters, reports are provided to the Board of Directors' Audit Committee. With respect to human resources related matters, reports are provided to the Board of Directors' Compensation and Organization Development Committee.

The STERIS Code of Business Conduct covers ethical marketing and off-label promotion. In fiscal 2026, STERIS incurred no monetary losses as a result of legal proceedings associated with false marketing claims.

Senior members of STERIS’s leadership team are involved in numerous industry associations that focus on setting the standards and driving change. We hold seats and actively participate on the boards of AdvaMed and the Medical Device Manufacturers Association ("MDMA"). We are also an active member of the Association for the Advancement of Medical Instrumentation ("AAMI") and MedTech Europe. AdvaMed has over 600 member companies and promotes policies that foster the highest ethical standards, timely patient access to safe and effective products, and economic policies that reward value creation. The AdvaMed Code of Ethics on Interactions with Health Care Professionals ("AdvaMed Code") facilitates ethical interactions between MedTech companies and health care professionals to ensure that medical decisions are based on the best interests of the patient. STERIS has adopted and requires compliance with the AdvaMed Code.

MDMA is the leading voice representing the interests of innovative and entrepreneurial medical technology companies. MDMA's goal is to provide patients and clinicians with timely access to safe and effective medical technologies that improve

the quality of life. AAMI is a nonprofit organization founded in 1967. It is a diverse community of more than 15,000 professionals united by one important mission-supporting the healthcare community in the development, management, and use of safe and effective healthcare technology. MedTech Europe is the European trade association for the medical technology industry including diagnostics, medical devices and digital health. MedTech Europe’s purpose is to make innovative medical technology available to more people, while helping healthcare systems move towards a more sustainable path. The MedTech Europe Code of Ethical Business Practice regulates all aspects of the industry’s relationship with Healthcare Professionals and Healthcare Organizations, to ensure that all interactions are ethical and professional at all times and to maintain the trust of regulators and patients. STERIS has adopted and requires compliance with the MedTech Europe Code of Ethical Business Practice.

ENERGY, GHG EMISSIONS AND ENVIRONMENTAL CONSERVATION

We are subject to various laws and governmental regulations concerning environmental matters and employee safety and health in Ireland, the United States and other countries. We have made, and continue to make, significant investments to comply with these laws and regulations. Our Continuous Improvement objectives include efforts to improve energy and water efficiency and reduce or eliminate certain chemicals used in, and wastes generated from, our operations thereby reducing the impact of our operations on the environment. We actively monitor and take steps to manage the risks associated with environmental matters, none of which we consider material at this time.

STERIS tracks greenhouse gas ("GHG") emissions, and we complete the annual Carbon Disclosure Project ("CDP") questionnaire. CDP is an internationally recognized nonprofit organization that collects and reports environmental metrics. Currently, we report our direct (Scope 1) and indirect (Scope 2) energy use and emissions. We recognize that a significant portion of our carbon impact is as a result of our value chain, outside of electricity and energy consumption at our global sites. We also report aggregate Scope 3 (upstream and downstream) emissions in our most recent CDP response and on our website. STERIS has committed to set near-term company-wide emission reductions. Our status can be viewed on the Science Based Targets Initiative ("SBTi") website.

We have a broad and comprehensive portfolio of sterilization and disinfection products that support the procedural spaces within hospitals, endoscopy and surgery centers as well as pharmaceutical and medical device Customers. When we think about new products or next generation products, part of our effort is to reduce the environmental impact of what we do. At STERIS, our commitment to sustainability is integrated with our Responsible Product Design. We create solutions that prioritize human health while reducing waste and climate impact through purposeful innovation. For example, V-PRO Sterilizers and VAPROX HC Sterilant are designed with sustainability at the core, helping hospitals meet their environmental goals without compromising performance or patient safety.

In Fiscal 2023, the European Commission’s Corporate Sustainability Reporting Directive ("CSRD") became effective. The CSRD expands the number of companies required to publicly report ESG-related information and defines the ESG-related information that companies are required to report in accordance with European Sustainability Reporting Standards ("ESRS"). We are making significant efforts in gathering baseline information, strengthening our internal controls, and evaluating our current ESG data. As part of this project, we continue to evaluate our ability to report in accordance with the Task Force on Climate-Related Financial Disclosures ("TCFD") framework in response to evolving regulatory disclosure requirements.

EMPLOYEES AND HUMAN CAPITAL MANAGEMENT

Strategy and Overview. People are the key to our success, which is reflected in our two core values of people and teamwork. We are committed to the safety and success of our people. We expect the performance of every person to continually improve with personal initiative and proper support. We expect our people to treat each other with mutual respect. Our ideal business team is engaged, diverse, inclusive and talented, and we create programs and policies in support of these goals.

We believe unity of purpose and teamwork enables us to do far more together than we could individually. We draw strength from each other and encourage communication with fairness, candor, respect and courage. Our collaboration turns interesting ideas into great products and services for our Customers.

Our senior management team and Board receive regular updates on our people, including data and metrics on retention, engagement and safety which are used to determine our human resources priorities, programs and training.

We are committed to upholding human rights in all our operations globally and respect human rights as recognized by the principles of the United Nations Global Compact. We strongly oppose all forms of slavery, servitude, forced labor, child labor and human trafficking.

Employees by Segment. During the course of fiscal 2026, we averaged approximately 18,000 employees throughout the world of which less than 12% are represented by work councils or labor unions. We believe we generally have good relations with our employees.

The average number of persons employed by STERIS plc and its subsidiaries during each of the following fiscal years was as follows:

We strive to recruit the best available people who are aligned with and embody our core values. We are committed to equality and assessing candidates based on qualifications. We believe that our success is dependent on attracting and retaining people from a cross-section of our communities who understand their markets, and in doing so we continue to create a competitive advantage for STERIS.

As we hire Associates, we do so without regard to race, color, social or economic status, religion, national origin, marital status, age, veteran status, sexual orientation, gender identity, or any protected status. It is the policy of the Company to make all decisions regarding employment, including hiring, compensation, training, promotions, transfers, or lay-offs, based on the job requirements and skills of the individuals and utilizing the principle of equal employment opportunity without discrimination. We have biennial training on anti-harassment, except where required annually.

Total directors and employees distribution by gender is shown in the table below:

Directors and United States employees by race is shown in the table below:

(1) A minority person is defined as a person who identifies as American Indian/Alaskan Native, Asian, Black or African American, Hispanic or Latino, Native Hawaiian or Other Pacific Island, or two or more races.

Health, Safety & Environment. We realize the importance of Health, Safety & Environment ("HSE") to the well-being of our Customers, employees, community, the environment, and ultimately our shareholders. To that end, our HSE teams and management are committed to supporting HSE programs with ongoing involvement through our continuous improvement process. Our ultimate goal is to be an incident-free company. The cornerstone of this initiative is the belief that incidents result from unsafe acts or conditions, both of which are preventable. We apply OSHA recordkeeping practices worldwide. Key metrics for purposes of benchmarking performance include Total Recordable Incident Rate ("TRIR") and Lost-time Incident Rate ("LTIR") injury and illness incident rates, both of which are presented in the table below:

(1) We apply OSHA recordkeeping practices worldwide. All rates are based on 100 full-time employees ("FTE") working one year. 100 FTEs equals 200,000 work hours. TRIR includes work-related injuries or illnesses requiring medical attention beyond first-aid. LTIR includes work-related injuries or illnesses that cause an employee to be away from work at least one full day after the date of the incident.

(2) Our external benchmarks include the OSHA average and 1st Quartile injury/illness rates which are derived from 2022 Bureau of Labor Statistics data.

Our annual workplace injury prevention results are within the manufacturing sector's best-in-class performance as defined by the Bureau of Labor Statistics.

We have chosen to align our environmental management system with the ISO 14001 standard, which sets out the criteria that a company or organization can follow to establish an effective environmental management system. Designed for any type of organization, regardless of its activity or sector, it can provide assurance that environmental impact is being measured, controlled and improved in a holistic manner. We currently have four facilities that are ISO 14001 accredited locations and three facilities that are 45001 accredited locations. Our HSE teams and management are committed to supporting HSE programs with ongoing involvement in aligning HSE management systems to ISO 14001 and ISO 45001 standards, internal compliance reviews, and developing HSE training content and platforms.

The OSHA Voluntary Protection Program ("VPP") Star Award recognizes employers who have implemented effective safety and health management systems and maintain injury and illness rates below national Bureau of Labor Statistics averages for their industry. We currently have 14 locations that hold the OSHA VPP Star Award.

We utilize internal HSE management systems and compliance audits designed to identify percent compliance of our global operations against our standards.

Employee Engagement and Development. We believe that engaged employees are more productive, innovative, and satisfied in their work. Examples of how we engage our employees include quarterly video updates, a robust intranet for communication with our global teams and various communications efforts within each department. In addition, our global human resources team has programs focused on career development and training for employees at all levels.

Our employee turnover rate was 13% and 16% for fiscal 2026 and 2025, respectively, and we are continuously working towards a goal of achieving a rate of 10% or less, excluding retirements and reductions in force. Although reductions in force are sometimes necessary, we work to avoid them, and they must always be approved by executive management. We encourage all employees to participate in our regular engagement survey which is administered by a third party on a confidential basis. This process has been valuable in helping us recognize what we do well and foster an open conversation about how we can make STERIS an even better place to work. We are pleased to report that 87% of our employees completed our pulse survey in fiscal 2026. The pulse survey results are grouped around four key themes: Employee Engagement; Leadership Effectiveness; Inclusion and Belonging; and Job and Work Experience. The results indicate strong favorability in each of these areas. Moreover, this year's survey allows us to measure progress by comparing results against the baseline established in the initial pulse survey in fiscal 2025.

Compensation and Benefits. Our total rewards offerings include an array of programs to support our employees' financial, physical, and mental well-being, including providing competitive salaries, variable performance pay, healthcare benefits, tuition assistance, paid time off, annual merit increases, and incentive plans based on the national norms of employees' location of employment. Total employee compensation is presented in the table below:

INFORMATION ABOUT OUR EXECUTIVE OFFICERS

The following table presents certain information regarding our executive officers at March 31, 2026. All executive officers serve at the pleasure of the Board of Directors.

The following discussion provides a summary of each executive officer's recent business experience through March 31, 2026:

Karen L. Burton serves as Senior Vice President and Chief Financial Officer. She assumed this role in August 2025. From January 2017 to August 2025, Ms. Burton served as Vice President and Chief Accounting Officer. Previously, Ms. Burton also served as Controller from January 2017 until December 2023. She joined STERIS in September 2004.

Daniel A. Carestio serves as President and CEO. He assumed this role in July 2021. From August 2018 to July 2021, he served as Senior Vice President and Chief Operating Officer. From February 2018 to August 2018, he served as Senior Vice President, Sterilization and Disinfection. From August 2015 to February 2018, he served as Senior Vice President, STERIS AST and Life Sciences. He joined STERIS in September 1997.

Mary Clare Fraser serves as Senior Vice President and Chief Human Resources Officer. She assumed this role in May 2022. She joined STERIS in July 2020 as the Vice President and Chief Human Resources Officer. From February 2003 to July 2020, she held various positions with Parker-Hannifin Corporation, a global motion control technologies company, serving most recently from September 2019 to July 2020, as Vice President Human Resources of its Aerospace Group and from March 2017 to September 2019 as its Corporate Director of Human Resources.

Kenneth E. Kohler serves as Senior Vice President and General Manager, AST. He assumed this role in February 2024. Previously, Mr. Kohler served from November 2015 to February 2024 as Vice President and General Manager of AST Americas. He joined STERIS in May 1988.

Julia K. Madsen serves as Senior Vice President and General Manager, Life Sciences. She assumed this role in July 2020. From August 2015 to July 2020, she served as Vice President and General Manager Life Sciences, Consumables. She joined STERIS in September 1995.

Cary L. Majors serves as Senior Vice President and President, Healthcare. He assumed this role in August 2022. From August 2019 to August 2022, he served as Senior Vice President, Americas Commercial Operations. From April 2014 to August 2019 he served as Vice President, North America Commercial Operations. He joined STERIS in April 2003.

Lindsey M. McGowan serves as Chief Compliance and Quality Officer. She assumed this role in January 2026. From September 2023 to December 2025, she served as Vice President, Quality. From September 2019 to September 2023, she served as Vice President, AST Quality Operations. She joined STERIS in May 2006.

Renato G. Tamaro serves as Vice President and Corporate Treasurer. He assumed this role in August 2017. From March 2006 to July 2017, he served as Assistant Treasurer. He joined STERIS in August 2003.

J. Adam Zangerle serves as Senior Vice President, General Counsel, and Company Secretary. He assumed this role in July 2018. From July 2013 to July 2018, he served as Vice President, General Counsel, and Secretary. He joined STERIS in November 1997.

This section describes certain risk factors that could affect our business, financial condition and results of operations. You should consider these risk factors when evaluating the forward-looking statements contained in this Annual Report on Form 10-K, because our actual results and financial condition might differ materially from those projected in the forward-looking statements should these risks occur. We face other risks besides those highlighted below. These other risks include additional uncertainties not presently known to us or that we currently believe are immaterial, but may ultimately have a significant impact. In addition, the impacts of ongoing geopolitical conflicts may also exacerbate any of these risks, which could have a material effect on us. Although the risks are organized by headings, and each risk is discussed separately, many are interrelated. Should any of these risks, described below or otherwise, actually occur, our business, financial condition, performance, prospects, value, or results of operations could be negatively affected.

LEGAL, REGULATORY AND TAX RISKS

Doing Business Internationally

Changes in economic climate may adversely affect us.

Adverse economic cycles or conditions, and Customer, regulatory or government responses to those cycles or conditions, have affected and could further affect our results of operations. The onset of these cycles or conditions may not be foreseeable and there can be no assurance when they will begin to improve after they occur. There also can be no assurance as to the strength or length of any recovery from a business downturn or recession. Credit and liquidity problems may make it difficult for some businesses to access credit markets and obtain financing and may cause some businesses to curtail spending to conserve cash in anticipation of persistent business slowdowns and liquidity needs. If our Customers have difficulty financing their purchases due to tight credit markets or related factors or because of other operational or utilization problems they may be experiencing or otherwise decide to curtail their purchases, our business could be adversely affected. Our exposure to bad debt losses could also increase if Customers are unable to pay for products previously ordered and delivered.

Some of our Customers are governmental entities or other entities that rely on government healthcare systems or government funding. If government funding for healthcare becomes limited or restricted in countries in which we operate, including as a result of the impacts of a pandemic or its residual effects, our Customers may be unable to pay their obligations on a timely basis or to make payment in full and it may become necessary to increase reserves. In addition, there can be no assurance that there will not be an increase in collection difficulties. Prospectively, additional adverse effects resulting from these conditions may include decreased healthcare utilization, further pricing pressure on our products and services, and/or weaker overall demand for our products and services, particularly capital products.

The effects of geopolitical instability may adversely affect us and create significant risks and uncertainties for our business, with the ultimate impact dependent on future developments, which are highly uncertain and unpredictable.

Geopolitical instability has negatively impacted, and could in the future negatively impact, the global and U.S. economies, including by causing supply chain disruptions, rising inflation, volatility in capital markets and foreign currency exchange rates, rising interest rates, reduced consumer and Customer demand, economic slowdowns and recessions and heightened cybersecurity risks. The extent to which such geopolitical instability, including changes to trade policy, adversely affects our business, financial condition and results of operations, as well as our liquidity and capital profile, may depend on future developments that are highly uncertain and unpredictable. If geopolitical instability or evolving trade policy materially affects us, it may also have the effect of heightening other risks related to our business.

The potential impacts of geopolitical instability, which may result from the actions of state and non-state actors, include supply chain and logistics disruptions, financial impacts including volatility in foreign exchange and interest rates, increased inflationary pressure on raw materials and energy, reduced consumer and Customer demand, economic slowdowns and recessions and other risks, including an elevated risk of cybersecurity threats and the potential for new or further sanctions, tariffs or changes to international trade policy.

Furthermore, the U.S. and other countries have announced and enacted changes, and planned changes, to international trade policy, including increasing tariffs on imports, and potentially renegotiating or terminating existing trade agreements. The international trade environment is highly dynamic, and such changes, and retaliatory responses thereto, continue to evolve. Tariffs, trade restrictions and other changes to international trade policies may result in increased production costs and product pricing, supply chain disruptions, limited access to end markets, lower profitability, increasing inability of consumers and Customers to pay, reduced consumer and Customer demand, economic slowdowns and recessions and uncertainty related to planning long-term investments and strategies, and may have other competitive effects, including those exacerbated by competitors with different supply chain footprints, each of which could have a material adverse effect on our business. In addition, the United States-Mexico-Canada Agreement (“USMCA”) requires a formal six-year joint evaluation of the agreement. The first such review is expected to commence on July 1, 2026, the sixth anniversary of the agreement's entry into

force. The U.S. has solicited feedback from the trading community regarding the operation of the USMCA, and the joint review could result in changes, including, for example, the processes by which goods qualify for preferential treatment, the tariffs applicable to products or other restrictions on the movement of goods within the region under the USMCA. Changes to the USMCA could adversely affect our manufacturing operations and those of our suppliers in Canada and Mexico and impact our ability to manufacture and market products or source materials at competitive prices, which could have a material adverse effect on our financial condition and results of operations. We cannot predict the ultimate scope, duration, or impact of current or future tariff measures, changes to existing trade agreements, such as the USMCA, or the imposition of other trade restrictions.

We may also need to make material changes to our global production footprint and workforce as a result of geopolitical developments or changes to trade policy, which could require significant capital expenditures and could result in asset impairments and other charges, including restructuring charges, any of which could be material. The duration and scope of all such changes that have been and will ultimately be implemented are not known at this time, and as such, any resulting impacts on our business are uncertain.

Compliance with multiple, and potentially conflicting, international laws and regulations, import and export limitations, anti-corruption laws, and exchange controls may be difficult, burdensome or expensive.

We are subject to compliance with various laws and regulations, including the U.S. Foreign Corrupt Practices Act, the U.K. Bribery Act, and similar anti-bribery laws, which generally prohibit companies and their intermediaries from making improper payments to officials for the purpose of obtaining or retaining business. We are also subject to limitations on trade with sanctioned persons or persons in sa

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None.

Cybersecurity Risk Management and Strategy

At STERIS, the ERM program is designed to identify, assess, and manage risks across STERIS’s enterprise. Cybersecurity risk management is integrated into STERIS’s ERM program, under which we regularly assess cybersecurity risks in accordance with what we believe are industry cybersecurity best practices. Further, we implement controls to protect the confidentiality, integrity and availability of STERIS’s information systems and information. We maintain cybersecurity and incident response procedures to address our security standards and requirements and provide a framework for assessing and responding to cybersecurity threats and incidents. Additionally, as part of our ERM program, STERIS oversees and identifies risks associated with third-party service providers with whom we do business, which process includes due diligence, risk management assessments and contractual safeguards. We also maintain cyber liability insurance to help mitigate potential liabilities resulting from cybersecurity issues.

STERIS has an Executive Cybersecurity Steering Committee consisting of the Senior Vice President & Chief Financial Officer, the Vice President, Corporate Controller, the Vice President, Investor Relations & Corporate Communications, the Vice President & Chief Information Officer (“CIO”), the Vice President, Chief Compliance and Quality Officer, the Senior Vice President, General Counsel & Company Secretary, and the Vice President, Chief Information Security Officer (“CISO”) that is responsible for providing governance, risk and compliance oversight for STERIS’s incident response program, providing guidance and support for cybersecurity non-technical initiatives, and for verifying that appropriate actions are taken following an incident occurrence. We have adopted and maintain an incident response policy that covers our incident response program and the duties and responsibilities of our Incident Response Team (“IRT”) responsible for managing and responding to cybersecurity incidents, including data breaches. Our IRT is led by the CISO and is comprised of senior management and others, including external resources, as required. Our incident response policy includes steps for detecting and investigating cybersecurity incidents, assessing the nature, scope, and severity of cybersecurity threats, identifying the impact of cybersecurity incidents, communicating cybersecurity incident disclosures, and implementing cybersecurity countermeasures and mitigation strategies. A subcommittee of our IRT reviews and assesses associated public reporting implications of cybersecurity incidents. Our process also includes informing the Board of Directors and the Audit Committee following a material cybersecurity incident.

We engage third-party security experts to support our risk assessment activities and to provide system security enhancements. Our program includes regular vulnerability and penetration testing (internal and external) of our enterprise systems by independent external security experts.

Education and awareness training on information security and data protection is conducted regularly for employees. Members of the IRT, the Executive Cybersecurity Steering Committee and the Board of Directors receive additional training on responding to cybersecurity incidents.

Our Board of Directors has oversight responsibility for the ERM program, and delegates the risk management assessment and risk management approach, including risks related to cybersecurity, to its Audit Committee. Among other responsibilities, the Audit Committee is responsible for monitoring internal controls, including those related to cybersecurity risk.

Management is responsible for identifying, considering, and assessing material cybersecurity risks on an ongoing basis, establishing processes to monitor such potential cybersecurity risk exposures, putting in place appropriate mitigation measures and maintaining the cybersecurity program. Our cybersecurity program for our information systems is directed by our CIO and, with the cybersecurity team, our CIO monitors the prevention, detection, mitigation, and remediation of cybersecurity incidents. Our CIO has a Bachelor of Science in Computer Engineering, a Master of Business Administration, and over 35 years of experience working in the information technology field, including approximately 20 years of CIO positions. Our CISO is CISSP-ISSMP and CISM certified and is part of a team of experienced information system security professionals with diverse certifications, including CISSP, CISM, CNSS, CEH, CySA+, CompTIA - Security+, CySA+, PenTest+, and CASP+ and others. Management, including the CIO and CISO, update the Audit Committee on a regular basis on our cybersecurity program, material cybersecurity risks, mitigation strategies, cybersecurity metrics, developments in cybersecurity and proposed updates to our cybersecurity program.

In fiscal year 2026, STERIS did not experience any known cyberattack or other attempted intrusion or other incident with respect to our information systems that materially affected or was likely to materially affect our business strategy, results of operations, financial condition or cash flows. However, despite our efforts, we cannot eliminate all risks from cybersecurity threats, or provide assurances that we have not experienced or will not experience in the future undetected cybersecurity incidents. For more information about these risks, please see “Item 1A Risk Factors” in this annual report on Form 10-K.

The following discussion sets forth materially important properties of the Company and its subsidiaries as of March 31, 2026. The Company believes that its facilities are adequate for operations and are maintained in good condition. The Company is confident that, if needed, it will be able to acquire additional facilities at commercially reasonable rates.

The Company’s principal executive office is located in Dublin, Ireland and its primary administrative offices are located in Mentor, OH (U.S.).

In our AST segment, we operate over 60 owned or leased facilities dedicated to delivering contract sterilization services. These strategically positioned locations are situated near Customer manufacturing and distribution sites, as well as key distribution corridors across Africa, Asia, Europe, and North America.

The Company operates approximately 250 locations representing sales, administrative, manufacturing and operational locations in the U.S. and more than 35 other countries, the majority of which are leased and support one or multiple business segments. In addition to these locations, the Company partners with third-party logistics service providers to streamline the distribution of product and materials. Operational locations are primarily comprised of service centers, manufacturing and distribution warehouses. Our locations are geographically spread to be in close proximity to our Customers to ensure timely delivery of products and services.

Included among totals listed above, the Company owns and leases manufacturing facilities that support the Healthcare, Life Sciences, and AST segments. The locations we deem to be material are disclosed in the following table:

Information regarding our legal proceedings is included in Item 7 of Part II, Management's Discussion and Analysis, and Note 12 to our consolidated financial statements titled, "Commitments and Contingencies," and is incorporated herein by reference thereto.

None.

PART II

Market Information. Our ordinary shares are traded on the New York Stock Exchange under the symbol “STE.”

Holders. As of March 31, 2026, there were approximately 360 holders of record of our ordinary shares.

Dividend Policy. The Company’s Board of Directors decides the timing and amount of any dividends we may pay. The Board expects to be able to continue to pay cash dividends for the foreseeable future.

Purchases of Equity Securities by the Issuer and Affiliated Purchasers.

On May 3, 2023 our Board of Directors terminated the previous share repurchase program then in effect and authorized a new share repurchase program (the “Outgoing Repurchase Program”) for the purchase of up to $500.0 million (exclusive of fees, commissions, and other charges), with no specified expiration date. As of March 31, 2026, there was $75.0 million (exclusive of fees, commissions, and other charges) of remaining availability under the Outgoing Repurchase Program.

Under the Outgoing Repurchase Program, the Company could repurchase its shares from time to time through open market purchases, including 10b5-1 plans. It also permitted share repurchases to be activated, suspended or discontinued at any time.

On May 5, 2026, the Board of Directors terminated the Outgoing Repurchase Program and authorized a new share repurchase program (the “New Repurchase Program”) for the purchase of up to $1,000.0 million (exclusive of fees, commissions, and other charges).

Under the New Repurchase Program, we may repurchase our shares from time to time through open market purchases, including 10b5-1 plans. Any share repurchases may be activated, suspended or discontinued at any time. There is no limitation on the number of shares that can be repurchased in a year and there is no expiration date for the New Repurchase Program.

During fiscal 2026, we repurchased 0.9 million of our ordinary shares for the aggregate amount of $225.0 million (exclusive of fees, commissions, and other charges) pursuant to authorizations under the Outgoing Repurchase Program. This does not include 27 shares purchased during the year at an average price of $247.66 per share by the STERIS Corporation 401(k) Plan on behalf of an executive officer of the Company who may be deemed to be an affiliated purchaser.

During fiscal 2026, we obtained 0.1 million of our ordinary shares in the aggregate amount of $12.5 million in connection with share-based compensation award programs.

The following table presents information with respect to purchases STERIS made of its ordinary shares under the Outgoing Repurchase Program during the fourth quarter of fiscal year 2026:

INTRODUCTION

In Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”), we explain the general financial condition and the results of operations for STERIS and its subsidiaries including:

• what factors affect our business;

• what our earnings and costs were in each period presented;

• why those earnings and costs were different from the year before;

• where our earnings came from;

• how this affects our overall financial condition;

• what our expenditures for capital projects were; and

• where cash is expected to come from to fund future debt principal repayments, growth outside of core operations, repurchases of shares, cash dividends and future working capital needs.

The MD&A also analyzes and explains the annual changes in the specific line items in the Consolidated Statements of Income. As you read the MD&A, it may be helpful to refer to information in Item 1, "Business," Part I, Item 1A, "Risk Factors," and Note 12 to our consolidated financial statements titled, "Commitments and Contingencies" for a discussion of some of the matters that can adversely affect our business and results of operations. This information, discussion, and disclosure may be important to you in making decisions about your investments in STERIS.

FINANCIAL MEASURES

In the following sections of the MD&A, we may, at times, refer to financial measures that are not required to be presented in the consolidated financial statements under accounting principles generally accepted in the United States ("U.S. GAAP"). We sometimes use the following financial measures in the context of this report: backlog and debt-to-total capital ratio. We define these financial measures as follows:

• Backlog – We define backlog as the amount of unfilled capital equipment purchase orders (excluding freight) at a point in time. We use this figure as a measure to assist in the projection of short-term financial results and inventory requirements.

• Debt-to-total capital ratio – We define debt-to-total capital ratio as total debt divided by the sum of total debt and shareholders’ equity. We use this figure as a financial liquidity measure to gauge our ability to borrow and fund growth.

We, at times, may also refer to financial measures which are considered to be “non-GAAP financial measures” under SEC rules. We have presented these financial measures because we believe that meaningful analysis of our financial performance is enhanced by an understanding of certain additional factors underlying that performance. These financial measures should not be considered an alternative to measures required by accounting principles generally accepted in the United States. Our calculations of these measures may differ from calculations of similar measures used by other companies, and you should be careful when comparing these financial measures to those of other companies. Additional information regarding these financial measures, including reconciliations of each non-GAAP financial measure, is available in the subsection of MD&A titled, "Non-GAAP Financial Measures."

REVENUES– DEFINED

As required by Regulation S-X, we separately present revenues generated as either Product revenues or Service revenues on our Consolidated Statements of Income for each period presented. When we discuss revenues, we may, at times, refer to revenues summarized differently than the Regulation S-X requirements. The terminology, definitions, and applications of terms that we use to describe revenues may be different from terms used by other companies. We use the following terms to describe revenues:

• Revenues – Our revenues are presented net of sales returns and allowances.

• Product Revenues – We define Product revenues as revenues generated from sales of consumable and capital equipment products.

• Service Revenues – We define Service revenues as revenues generated from parts and labor associated with the maintenance, repair, and installation of our capital equipment. Service revenues also include outsourced reprocessing services and instrument and scope repairs, as well as revenues generated from contract sterilization and laboratory services offered through our AST segment.

• Capital Equipment Revenues – We define capital equipment revenues as revenues generated from sales of capital equipment, which includes steam and gas sterilizers, low temperature liquid chemical sterilant processing systems, automated endoscope reprocessors, pure steam/water systems, surgical lights and tables, and integrated operating rooms.

• Consumable Revenues – We define consumable revenues as revenues generated from sales of the consumable family of products, which includes dedicated consumables used in our capital equipment, gastrointestinal endoscopy accessories, instruments and tools, sterility assurance products, barrier protection solutions, and cleaning consumables.

• Recurring Revenues – We define recurring revenues as revenues generated from sales of consumable products and Service revenues.

GENERAL OVERVIEW AND EXECUTIVE SUMMARY

STERIS is a leading global provider of products and services that support patient care with an emphasis on infection prevention. WE HELP OUR CUSTOMERS CREATE A HEALTHIER AND SAFER WORLD by providing innovative healthcare and life science products and services around the globe. We offer our Customers a unique mix of innovative products and services. These include: consumable products, such as detergents, endoscopy accessories, barrier products, instruments and tools; services, including equipment installation and maintenance, microbial reduction of medical devices, instrument and scope repair, laboratory testing, and outsourced reprocessing; capital equipment, such as sterilizers, surgical tables, and automated endoscope reprocessors; and connectivity solutions such as OR integration.

We operate and report our financial information in three reportable business segments: Healthcare, AST, and Life Sciences. Previously, we had four reportable business segments; however, as a result of the fiscal 2025 divestiture of our Dental segment, Dental is presented as discontinued operations. Historical information has been retrospectively adjusted to exclude discontinued operations for comparability, as required. For more information, refer to Note 4 to our consolidated financial statements titled, "Discontinued Operations." Non-allocated operating costs that support the entire Company and items not indicative of operating trends are excluded from segment operating income. We describe our business segments in Note 13 to our consolidated financial statements titled, "Business Segment Information."

The bulk of our revenues are derived from healthcare, medical device and pharmaceutical Customers. Much of the growth in these industries is driven by the aging of the population throughout the world, as an increasing number of individuals are entering their prime healthcare consumption years, and is dependent upon advancement in healthcare delivery, acceptance of new technologies, government policies, and general economic conditions.

In addition, there is increased demand for medical procedures, including preventive screenings such as endoscopies and colonoscopies; and a desire by our Customers to operate more efficiently, all of which are driving increased demand for many of our products and services.

Acquisitions, Divestitures, and Investments. During fiscal 2026, we completed two tuck-in acquisitions which continued to expand our product and service offerings in the Healthcare segment. Total aggregate consideration was approximately $23.4 million, including fair value of contingent consideration. We also purchased investments totaling $134.0 million, predominantly related to a noncontrolling equity investment in a non-U.S.-based healthcare product manufacturer.

During fiscal 2025, we completed several tuck-in acquisitions which continued to expand o

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In the ordinary course of business, we are exposed to various risks, including, but not limited to, interest rate, foreign currency, and commodity risks. These risks are described in the sections that follow.

INTEREST RATE RISK

As of March 31, 2026, we had $1,907.8 million in fixed rate senior notes outstanding. As of March 31, 2026, we had $37.8 million in outstanding borrowings under our Revolving Credit Agreement which are exposed to changes in interest rates. Based upon our debt structure at March 31, 2026, a hypothetical 100 basis point increase in floating interest rates would increase annual interest expense by approximately $0.4 million. We monitor our interest rate risk, but do not engage in any hedging activities using derivative financial instruments. For additional information regarding our debt structure, refer to Note 8 to our consolidated financial statements titled, “Debt.”

FOREIGN CURRENCY RISK

We are exposed to the impact of foreign currency exchange fluctuations. This foreign currency exchange risk arises when we conduct business in a currency other than the U.S. dollar. For most operations, local currencies have been determined to be the functional currencies. The financial statements of subsidiaries are translated to their U.S. dollar equivalents at end-of-period exchange rates for assets and liabilities and at average currency exchange rates for revenues and expenses. Translation adjustments for subsidiaries whose local currency is their functional currency are recorded as a component of accumulated other comprehensive income (loss) within equity. Note 20 to our consolidated financial statements titled, “Reclassifications out of Accumulated Other Comprehensive Income (Loss),” contains additional information about the impact of translation on accumulated other comprehensive income (loss) and equity. Transaction gains and losses arising from fluctuations in currency exchange rates on transactions denominated in currencies other than the functional currency are recognized in the Consolidated Statements of Income. Since we operate internationally and approximately 27% of our revenues and 26% of our Cost of revenues are generated outside the United States, foreign currency exchange rate fluctuations can significantly impact our financial position, results of operations, and competitive position.

We enter into foreign currency forward contracts to hedge monetary assets and liabilities denominated in foreign currencies, including intercompany transactions. We may also hold foreign currency forward contracts to hedge a portion of our expected non-U.S. dollar denominated earnings against our reporting currency, the U.S. dollar. We do not use derivative financial instruments for speculative purposes. At March 31, 2026, we held foreign net currency forward contracts to buy 210.0 million Mexican pesos, and to sell 4.0 million Australian dollars and 7.0 million New Zealand dollars.

COMMODITY RISK

We are dependent on basic raw materials, sub-assemblies, components, and other supplies used in our operations. Our financial results could be affected by the availability and changes in prices of these materials. Some of these materials are sourced from a limited number of suppliers or only a single supplier. These materials are also key source materials for our competitors. Therefore, if demand for these materials rises, we may experience increased costs and/or limited or unavailable supplies. As a result, we may not be able to acquire key production materials on a timely basis, which could impact our ability to produce products and satisfy incoming sales orders on a timely basis. In addition, the costs of these materials can rise suddenly and result in significantly higher costs of production. We believe that we have adequate sources of supply for many of our key materials and energy sources. Where appropriate, we enter into long-term supply contracts as a basis to guarantee a reliable supply. We may also enter into commodity swap contracts to hedge price changes in commodities that impact raw materials included in our Cost of revenues. At March 31, 2026, we held commodity swap contracts to buy 0.6 million pounds of nickel.

INDEX TO FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULE

Report of Independent Registered Public Accounting Firm

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.

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

/s/ Ernst & Young LLP

Cleveland, Ohio

May 29, 2026

STERIS PLC AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(in millions, except par value)

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None.

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES

Our management, including the Principal Executive Officer (“PEO”) and Principal Financial Officer (“PFO”), has evaluated the effectiveness of our disclosure controls and procedures, as defined in Exchange Act Rules 13a-15(e) and 15d-15(e), as of the end of the period covered by this Annual Report on Form 10-K. Based on this evaluation, the PEO and PFO have determined that, as of the end of the period covered by this Annual Report on Form 10-K, our disclosure controls and procedures were effective.

CHANGES IN INTERNAL CONTROLS

During the quarter ended March 31, 2026, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in the Exchange Act Rules 13a-15(f). Under the supervision and with the participation of management, including the PEO and PFO, we conducted an evaluation of the effectiveness of internal control over financial reporting as of March 31, 2026 based on the framework in 2013 Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation under this framework, management concluded that the internal control over financial reporting was effective as of March 31, 2026. Our evaluation of internal control over financial reporting did not include the internal controls of the businesses that were acquired during fiscal 2026. Total assets of the acquired businesses represented approximately 0.4% of our total assets as of March 31, 2026 and approximately 0.1% of our total revenues for the year ended March 31, 2026. Based on this evaluation under this framework, management concluded that the internal control over financial reporting was effective as of March 31, 2026.

The independent registered public accounting firm that audited the financial statements has issued an attestation report on internal control over financial reporting.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and the Board of Directors of STERIS plc

Opinion on Internal Control Over Financial Reporting

We have audited STERIS plc and subsidiaries’ 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) (the COSO criteria). In our opinion, STERIS plc and subsidiaries (the Company) maintained, in all material respects, effective internal control over financial reporting as of March 31, 2026, based on the COSO criteria.

As indicated in the accompanying Management’s Report on Internal Control Over Financial Reporting, management’s assessment of and conclusion on the effectiveness of internal control over financial reporting did not include the internal controls of the businesses that were acquired during the year ended March 31, 2026, which are included in the fiscal 2026 consolidated financial statements of the Company and constituted approximately 0.4% of total assets as of March 31, 2026 and approximately 0.1% of total revenues for the year then ended. Our audit of internal control over financial reporting of the Company also did not include an evaluation of the internal control over financial reporting of the businesses that were acquired during the year ended March 31, 2026.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of 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) and our report dated May 29, 2026 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. 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 audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Cleveland, Ohio

May 29, 2026

During the quarter ended March 31, 2026, none of our directors or officers (as defined in Rule 16a-1(f) of the Exchange Act) adopted, modified or terminated a "Rule 10b5-1 trading arrangement" or a "non-Rule 10b5-1 trading arrangement" as such terms are defined under Item 408 of Regulation S-K.

Not Applicable.

PART III

This Annual Report on Form 10-K incorporates by reference the information appearing under the caption "Nominees for Election as Directors," "Board Meetings and Committees," "Shareholder Nominations of Directors and Nominee Criteria", "Insider Trading Policy" and "Shareholder Proposals" of our definitive proxy statement to be filed with the SEC in connection with our 2026 Annual Meeting of Shareholders (the "Proxy Statement").

Our executive officers serve for a term of one year from the date of election to the next organizational meeting of the Board of Directors and until their respective successors are elected and qualified, except in the case of death, resignation, or removal. Information concerning our executive officers is contained in Item 1 of Part 1 of this Annual Report under the heading "Information about our Executive Officers", and is incorporated herein by reference. We have adopted a code of ethics, our Code of Business Conduct for Employees, that applies to our CEO and CFO and Principal Accounting Officer as well as all of our other employees. We have also adopted a code of ethics, our Director Code of Ethics, which applies to the members of the Company's Board of Directors, including our CEO. Our Code of Business Conduct for Employees and the Director Code of Ethics can be found on our Investor Relations website at www.steris-ir.com. Any amendments or waivers of either of these codes will be made available on this website.

This Annual Report on Form 10-K incorporates by reference the information appearing beginning under the captions "Executive Compensation," "Non-Employee Director Compensation," "Pay Versus Performance," and "Miscellaneous Matters" of the Proxy Statement.

This Annual Report on Form 10-K incorporates by reference the information appearing under the captions "Ownership of Voting Securities" of the Proxy Statement.

The table below presents information concerning all equity compensation plans and individual equity compensation arrangements in effect as of our fiscal year ended March 31, 2026.

This Annual Report on Form 10-K incorporates by reference the information beginning under the captions "Governance Generally", "Board Meetings and Committees" and "Miscellaneous Matters" of the Proxy Statement.

This Annual Report on Form 10-K incorporates by reference the information relating to principal accountant fees and services appearing under the caption "Independent Registered Public Accounting Firm" of the Proxy Statement.

PART IV

LIST OF CONSOLIDATED FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULE

(a) (1) The following consolidated financial statements of STERIS plc and subsidiaries are included in Item 8:

Consolidated Balance Sheets – March 31, 2026 and 2025.

Consolidated Statements of Income – Years ended March 31, 2026, 2025, and 2024.

Consolidated Statements of Comprehensive Income – Years ended March 31, 2026, 2025, and 2024.

Consolidated Statements of Cash Flows – Years ended March 31, 2026, 2025, and 2024.

Consolidated Statements of Shareholders’ Equity – Years ended March 31, 2026, 2025, and 2024.

Notes to Consolidated Financial Statements.

(a) (2) The following consolidated financial statement schedule of STERIS plc and subsidiaries is included in Item 8:

Schedule II - Valuation and Qualifying Accounts

All other schedules for which provision is made in the applicable accounting regulation of the SEC are not required under the related instructions or are inapplicable and, therefore, have been omitted.

(a) (3) Exhibits

Not Applicable.

SIGNATURES

Pursuant to the requirements of Sections 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on the date indicated.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the date indicated.