The directors present the strategic report for the year ended 31 March 2025.

The principal activity of the company continued to be that of an intermediate holding company.

Primarily the company’s transactions are with fellow group undertakings and as such there are not considered to be any significant risks and uncertainties impacting the company. Any uncertainties impacting the company would arise from internal decisions taken within the group.

The company made a profit after tax of $76 (2024: $64)

At the year end the company has net assets totalling $2,452 (2024: $2,376)

Section 172 states a director of a company must act in the way he considers, in good faith, would be most likely to promote the success of the company for the benefit of its members as a whole, and in doing so have regard (amongst other matters) to:

(a) the likely consequences of any decision in the long term,

(b) the interests of the company's employees,

(c) the need to foster the company's business relationships with suppliers, customers and others,

(d) the impact of the company's operations on the community and the environment,

(e) the desirability of the company maintaining a reputation for high standards of business conduct, and

(f) the need to act fairly between members of the company.

STERIS Dover AST Holdings Limited is a 100% owned subsidiary within the STERIS plc group, and as with many international groups, the directors delegate the day to day management of the company to local teams. The directors of the company are U.S. based and are executive officers of STERIS plc. The company’s management is structured to align the company’s objectives with that of the group, and to ensure the company follows group policies. Further details on these can be found in STERIS plc’s financial statements, which are available online or from 70 Sir John Rogerson’s Quay, Dublin 2, D02 R296, Ireland.

The directors of the company receive regular reporting from their delegated management team and have regular updates to ensure the company continues to meet the directors’ expectations. Details of the KPIs monitored by the directors and the results for the year are detailed above.

The company is an intermediate holding company within the STERIS group, that does not employ any personnel and does not trade. As such its stakeholders are limited and the company identifies these as its shareholder and regulators. The directors acknowledge that the views of, and effects on, these people in regard to key business objectives and decisions are of critical importance to the continued success of the company. Each of these stakeholders will have different expectations of the company and these are as follows:

Shareholder – the shareholder expects the company to continue to provide a return on its capital and to continue to provide opportunities for future returns.

Regulators –The key regulator for the company is HMRC. HMRC expects the company to meet all compliance requirements and submit returns and payments as required, accurately and on time.

There have been no strategic or key changes to the operating structure or objectives of the business in the year.

Key business decisions

The directors would consider a key business decision to be one which has a material impact on the operations, objectives or financial position of the business.

There were no key business decisions made in the year.

On behalf of the board

The directors present their annual report and financial statements for the year ended 31 March 2025.

The principal activity of the company continued to be that of an intermediate holding company.

The results for the year are set out on page 9.

No ordinary dividends were paid. The directors do not recommend payment of a final dividend.

The directors who held office during the year and up to the date of signature of the financial statements were as follows:

During the period STERIS group maintained insurance cover for directors' and officers' liability as permitted under the Companies Act 2006. Such qualifying third party indemnity provision remains in force as at the date of approving the directors report.

In accordance with the company's articles, a resolution proposing that Ernst & Young LLP be reappointed as auditor of the company will be put at a General Meeting.

The company has chosen in accordance with Companies Act 2006, s. 414C(11) to set out in the company's strategic report certain information required be contained in the directors' report.

So far as each person who was a director at the date of approving this report is aware, there is no relevant audit information of which the company’s auditor is unaware. Additionally, the directors individually have taken all the necessary steps that they ought to have taken as directors in order to make themselves aware of all relevant audit information and to establish that the company’s auditor is aware of that information.

The Company’s business activities, together with a review of the business and the impact of the principal risks and uncertainties have been described in the strategic report. For the year to 31 March 2025 the company made a profit amounting to $76 and had net assets of $2,452. The company has also received confirmation from its intermediate parent undertaking, STERIS Limited, of its intention to provide support, where needed, for a period of 12 months from the date of approval of the accounts. The directors have assessed the ability of STERIS Limited to provide support and therefore have a reasonable expectation that the company has adequate resources to continue in operational existence for the foreseeable future. Accordingly, the directors continue to adopt the going concern basis of accounting in preparing the financial statements.

The directors are responsible for preparing the annual report and the financial statements in accordance with applicable law and regulations.

Company law requires the directors to prepare financial statements for each financial year. Under that law the directors have elected to prepare the company's financial statements in accordance with United Kingdom Generally Accepted Accounting Practice (United Kingdom Accounting Standards and applicable law), including Financial Reporting Standard FRS 102, The Financial Reporting Standard applicable in the UK and Republic of Ireland ("FRS 102"). Under company law, the directors must not approve the financial statements unless they are satisfied that they give a true and fair view of the state of affairs of the company and of the profit or loss of the company for that period.

In preparing these financial statements, the directors are required to:

• select suitable accounting policies in accordance with Section 10 of FRS 102 and then apply them consistently;

• make judgements and accounting estimates that are reasonable and prudent;

• present information, including accounting policies, in a manner that provides relevant, reliable, comparable and understandable information;

• provide additional disclosures when compliance with the specific requirements in FRS 102 is insufficient to enable users to understand the impact of particular transactions, other events and conditions on the group and company financial position and financial performance;

• in respect of the company financial statements, state whether applicable UK Accounting Standards, including FRS102, have been followed, subject to any material departures disclosed and explained in the financial statements; and

• prepare the financial statements on the going concern basis unless it is inappropriate to presume that the company will continue in business.

The directors are responsible for keeping adequate accounting records that are sufficient to show and explain the company’s transactions and disclose with reasonable accuracy at any time the financial position of the company and enable them to ensure that the financial statements comply with the Companies Act 2006. They are also responsible for safeguarding the assets of the company and hence for taking reasonable steps for the prevention and detection of fraud and other irregularities.

Under applicable law and regulations, the directors are responsible for preparing a strategic report and directors' report that comply with that law and those regulations. The directors are responsible for the maintenance and integrity of the corporate and financial information included on the company's website.

We have audited the financial statements of STERIS Dover AST Holdings Limited (the 'company') for the year ended 31 March 2025 which comprise the statement of comprehensive income, the statement of financial position, the statement of changes in equity and the related notes 1 to 13, including a summary of significant accounting policies. The financial reporting framework that has been applied in their preparation is applicable law and United Kingdom Accounting Standards, including Financial Reporting Standard 102 The Financial Reporting Standard applicable in the UK and Republic of Ireland (United Kingdom Generally Accepted Accounting Practice).

In our opinion the financial statements:

• give a true and fair view of the state of the company's affairs as at 31 March 2025 and of its profit for the year then ended;

• have been properly prepared in accordance with United Kingdom Generally Accepted Accounting Practice; and

• have been prepared in accordance with the requirements of the Companies Act 2006.

Basis for opinion

We conducted our audit in accordance with International Standards on Auditing (UK) (ISAs (UK)) and applicable law. Our responsibilities under those standards are further described in the Auditor's responsibilities for the audit of the financial statements section of our report. We are independent of the company in accordance with the ethical requirements that are relevant to our audit of the financial statements in the UK, including the FRC’s Ethical Standard, and we have fulfilled our other ethical responsibilities in accordance with these requirements. We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our opinion.

Conclusions relating to going concern

In auditing the financial statements, we have concluded that the directors' use of the going concern basis of accounting in the preparation of the financial statements is appropriate.

Based on the work we have performed, we have not identified any material uncertainties relating to events or conditions that, individually or collectively, may cast significant doubt on the company's ability to continue as a going concern for a period of twelve months from when the financial statements are approved for issue.

Our responsibilities and the responsibilities of the directors with respect to going concern are described in the relevant sections of this report.

Other information

The other information comprises the information included in the annual report other than the financial statements and our auditor's report thereon. The directors are responsible for the other information contained within the annual report. Our opinion on the financial statements does not cover the other information and, except to the extent otherwise explicitly stated in our report, we do not express any form of assurance conclusion thereon. Our responsibility is to read the other information and, in doing so, consider whether the other information is materially inconsistent with the financial statements or our knowledge obtained in the course of the audit, or otherwise appears to be materially misstated. If we identify such material inconsistencies or apparent material misstatements, we are required to determine whether this gives rise to a material misstatement in the financial statements themselves. If, based on the work we have performed, we conclude that there is a material misstatement of this other information, we are required to report that fact.

We have nothing to report in this regard.

Opinions on other matters prescribed by the Companies Act 2006

In our opinion, based on the work undertaken in the course of our audit:

• the information given in the strategic report and the directors' report for the financial year for which the financial statements are prepared is consistent with the financial statements; and

• the strategic report and the directors' report have been prepared in accordance with applicable legal requirements.

In the light of the knowledge and understanding of the company and its environment obtained in the course of the audit, we have not identified material misstatements in the strategic report or the directors' report.

We have nothing to report in respect of the following matters in relation to which the Companies Act 2006 requires us to report to you if, in our opinion:

• adequate accounting records have not been kept, or returns adequate for our audit have not been received from branches not visited by us; or

• the financial statements are not in agreement with the accounting records and returns; or

• certain disclosures of remuneration specified by law are not made; or

• we have not received all the information and explanations we require for our audit.

As explained more fully in the directors' responsibilities statement set out on page 5, the directors are responsible for the preparation of the financial statements and for being satisfied that they give a true and fair view, and for such internal control as the directors determine is necessary to enable the preparation of financial statements that are free from material misstatement, whether due to fraud or error. In preparing the financial statements, the directors are responsible for assessing the company's ability to continue as a going concern, disclosing, as applicable, matters related to going concern and using the going concern basis of accounting unless the directors either intend to liquidate the company or to cease operations, or have no realistic alternative but to do so.

Our objectives are to obtain reasonable assurance about whether the financial statements as a whole are free from material misstatement, whether due to fraud or error, and to issue an auditor's report that includes our opinion. Reasonable assurance is a high level of assurance but is not a guarantee that an audit conducted in accordance with ISAs (UK) will always detect a material misstatement when it exists. Misstatements can arise from fraud or error and are considered material if, individually or in the aggregate, they could reasonably be expected to influence the economic decisions of users taken on the basis of these financial statements.

Irregularities, including fraud, are instances of non-compliance with laws and regulations. We design procedures in line with our responsibilities, outlined above, to detect irregularities, including fraud. The risk of not detecting a material misstatement due to fraud is higher than the risk of not detecting one resulting from error, as fraud may involve deliberate concealment by, for example, forgery or intentional misrepresentations, or through collusion. The extent to which our procedures are capable of detecting irregularities, including fraud is detailed below. However, the primary responsibility for the prevention and detection of fraud rests with both those charged with governance of the entity and management.

• We obtained an understanding of the legal and regulatory frameworks that are applicable to the company and determined that the most significant are those that relate to the reporting framework (FRS 102 and the Companies Act 2006) and tax regulation in the United Kingdom.

• We understood how the Company is complying with those frameworks by making enquiries of senior management and the finance team to understand how the company maintains and communicates its policies and procedures in these areas and corroborated this by reviewing minutes of board meetings and the financial statements.

• We assessed the susceptibility of the company’s financial statements to material misstatement, including how fraud might occur by meeting with management to understand where they considered there was susceptibility to fraud. We considered the processes and controls that the company had established to address identified risks, or that otherwise prevent or detect fraud; and how management monitors those processes and controls. Due to the nature of the Company and its limited level of transaction activities, we have not identified any risk of material misstatement due to fraud.

• Based on this understanding we designed our audit procedures to identify noncompliance with such laws and regulations. Our procedures involved understanding management’s internal controls over compliance with laws and regulations, enquiries of management, vouching transactions to source documentation and verifying that they are recorded in compliance with FRS 102 and in conformity with the requirements of the Companies Act 2006.

A further description of our responsibilities is available on the Financial Reporting Council’s website at: https://www.frc.org.uk/auditorsresponsibilities. This description forms part of our auditor's report.

Use of our report

This report is made solely to the company's member in accordance with Chapter 3 of Part 16 of the Companies Act 2006. Our audit work has been undertaken so that we might state to the company's member those matters we are required to state to the member in an auditor's report and for no other purpose. To the fullest extent permitted by law, we do not accept or assume responsibility to anyone other than the company and the company's member, for our audit work, for this report, or for the opinions we have formed.

The statement of comprehensive income has been prepared on the basis that all operations are continuing operations.

There is no other comprehensive income (2024: $nil).

STERIS Dover AST Holdings Limited is a private company limited by shares incorporated in England and Wales. The registered office is 2200 Renaissance, Basing View, Basingstoke, Hampshire, RG21 4EQ.

These financial statements have been prepared in accordance with FRS 102 “The Financial Reporting Standard applicable in the UK and Republic of Ireland” (“FRS 102”) and the requirements of the Companies Act 2006.

The financial statements are prepared in US Dollars, which is the functional currency of the company. Monetary amounts in these financial statements are rounded to the nearest $.

The financial statements have been prepared under the historical cost convention. The principal accounting policies adopted are set out below.

This company is a qualifying entity for the purposes of FRS 102, being a member of a group where the parent of that group prepares publicly available consolidated financial statements, including this company, which are intended to give a true and fair view of the assets, liabilities, financial position and profit or loss of the group. The company has therefore taken advantage of exemptions from the following disclosure requirements:

• Section 7 ‘Statement of Cash Flows’: Presentation of a statement of cash flow and related notes and disclosures;

• Section 11 ‘Basic Financial Instruments’ and Section 12 ‘Other Financial Instrument Issues’: Interest income/expense and net gains/losses for each category of financial instrument; basis of determining fair values; details of collateral, loan defaults or breaches, details of hedges, hedging fair value changes recognised in profit or loss and in other comprehensive income;

• Section 33 ‘Related Party Disclosures’: Compensation for key management personnel.

The financial statements of the company are consolidated in the financial statements of STERIS plc. These consolidated financial statements are available from its registered office, 70 Sir John Rogerson's Quay, Dublin 2, D02 R296, Ireland.

The company has taken advantage of the exemption under section 401 of the Companies Act 2006 not to prepare consolidated accounts. The financial statements present information about the company as an individual entity and not about its group.

The Company’s business activities, together with a review of the business and the impact of the principal risks and uncertainties have been described in the strategic report. For the year to 31 March 2025 the company made a profit amounting to $true76 and had net assets of $2,452. The company has also received confirmation from its intermediate parent undertaking, STERIS Limited, of its intention to provide support, where needed, for a period of 12 months from the date of approval of the accounts. The directors have assessed the ability of STERIS Limited to provide support and therefore have a reasonable expectation that the company has adequate resources to continue in operational existence for the foreseeable future. Accordingly, the directors continue to adopt the going concern basis of accounting in preparing the financial statements.

Interests in subsidiaries are initially measured at cost and subsequently measured at cost less any accumulated impairment losses. The investments are assessed for impairment at each reporting date and any impairment losses or reversals of impairment losses are recognised immediately in profit or loss.

The company has elected to apply the provisions of Section 11 ‘Basic Financial Instruments’ and Section 12 ‘Other Financial Instruments Issues’ of FRS 102 to all of its financial instruments.

Financial instruments are recognised in the company's statement of financial position when the company becomes party to the contractual provisions of the instrument.

Financial assets and liabilities are offset, with the net amounts presented in the financial statements, when there is a legally enforceable right to set off the recognised amounts and there is an intention to settle on a net basis or to realise the asset and settle the liability simultaneously.

Basic financial assets, which include amounts owed by fellow group undertakings, are initially measured at transaction price including transaction costs and are subsequently carried at amortised cost using the effective interest method unless the arrangement constitutes a financing transaction, where the transaction is measured at the present value of the future receipts discounted at a market rate of interest. Financial assets classified as receivable within one year are not amortised.

Other financial assets, including investments in equity instruments which are not subsidiaries, associates or joint ventures, are initially measured at fair value, which is normally the transaction price. Such assets are subsequently carried at fair value and the changes in fair value are recognised in profit or loss, except that investments in equity instruments that are not publicly traded and whose fair values cannot be measured reliably are measured at cost less impairment.

Financial assets, other than those held at fair value through profit and loss, are assessed for indicators of impairment at each reporting end date.

Financial assets are impaired where there is objective evidence that, as a result of one or more events that occurred after the initial recognition of the financial asset, the estimated future cash flows have been affected. If an asset is impaired, the impairment loss is the difference between the carrying amount and the present value of the estimated cash flows discounted at the asset’s original effective interest rate. The impairment loss is recognised in profit or loss.

If there is a decrease in the impairment loss arising from an event occurring after the impairment was recognised, the impairment is reversed. The reversal is such that the current carrying amount does not exceed what the carrying amount would have been, had the impairment not previously been recognised. The impairment reversal is recognised in profit or loss.

Financial assets are derecognised only when the contractual rights to the cash flows from the asset expire or are settled, or when the company transfers the financial asset and substantially all the risks and rewards of ownership to another entity, or if some significant risks and rewards of ownership are retained but control of the asset has transferred to another party that is able to sell the asset in its entirety to an unrelated third party.

Basic financial liabilities, which include loans from fellow group companies, are initially recognised at transaction price unless the arrangement constitutes a financing transaction, where the debt instrument is measured at the present value of the future payments discounted at a market rate of interest. Financial liabilities classified as payable within one year are not amortised.

Debt instruments are subsequently carried at amortised cost, using the effective interest rate method.

Derivatives, including interest rate swaps and forward foreign exchange contracts, are not basic financial instruments. Derivatives are initially recognised at fair value on the date a derivative contract is entered into and are subsequently re-measured at their fair value. Changes in the fair value of derivatives are recognised in profit or loss in finance costs or finance income as appropriate, unless hedge accounting is applied and the hedge is a cash flow hedge.

Debt instruments that do not meet the conditions in FRS 102 paragraph 11.9 are subsequently measured at fair value through profit or loss. Debt instruments may be designated as being measured at fair value through profit or loss to eliminate or reduce an accounting mismatch or if the instruments are measured and their performance evaluated on a fair value basis in accordance with a documented risk management or investment strategy.

Financial liabilities are derecognised when the company’s contractual obligations expire or are discharged or cancelled.

Equity instruments issued by the company are recorded at the proceeds received, net of transaction costs. Dividends payable on equity instruments are recognised as liabilities once they are no longer at the discretion of the company.

The tax expense represents the sum of the tax currently payable and deferred tax.

The tax currently payable is based on taxable profit for the year. Taxable profit differs from net profit as reported in the income statement because it excludes items of income or expense that are taxable or deductible in other years and it further excludes items that are never taxable or deductible. The company’s liability for current tax is calculated using tax rates that have been enacted or substantively enacted by the reporting end date.

Deferred tax liabilities are generally recognised for all timing differences and deferred tax assets are recognised to the extent that it is probable that they will be recovered against the reversal of deferred tax liabilities or other future taxable profits. Such assets and liabilities are not recognised if the timing difference arises from goodwill or from the initial recognition of other assets and liabilities in a transaction that affects neither the tax profit nor the accounting profit.

The carrying amount of deferred tax assets is reviewed at each reporting end date and reduced to the extent that it is no longer probable that sufficient taxable profits will be available to allow all or part of the asset to be recovered. Deferred tax is calculated at the tax rates that are expected to apply in the period when the liability is settled or the asset is realised. Deferred tax is charged or credited in the income statement, except when it relates to items charged or credited directly to equity, in which case the deferred tax is also dealt with in equity. Deferred tax assets and liabilities are offset when the company has a legally enforceable right to offset current tax assets and liabilities and the deferred tax assets and liabilities relate to taxes levied by the same tax authority.

Transactions in currencies other than US dollars are recorded at the rates of exchange prevailing at the dates of the transactions. At each reporting end date, monetary assets and liabilities that are denominated in foreign currencies are retranslated at the rates prevailing on the reporting end date. Gains and losses arising on translation are included in the income statement for the period.

In the application of the company’s accounting policies, the directors are required to make judgements, estimates and assumptions about the carrying amount of assets and liabilities that are not readily apparent from other sources. The estimates and associated assumptions are based on historical experience and other factors that are considered to be relevant. Actual results may differ from these estimates.

The directors do not consider there are any material judgements or estimates to disclose.

The auditors remuneration of $11,621 (2024: $11,062) was borne by another group company.

The average monthly number of persons (including directors) employed by the company during the year was:

The company does not have any employees.

The directors’ remuneration has been borne by another group company. The directors are also directors or officers of a number of group companies. The directors’ services to the company do not occupy a significant amount of their time. As such, the directors do not consider that they have received any remuneration for their incidental services.

The actual charge for the year can be reconciled to the expected charge for the year based on the profit or loss and the standard rate of tax as follows:

In December 2021, the OECD released an Inclusive Framework on Base Erosion and Profit Shifting including Pillar Two Model Rules, which aim to reform corporate taxation rules, including a global minimum tax rate. These rules are applicable for multinational enterprise groups with global revenue over €750m. The legislation implementing the rules in the UK was substantively enacted on 20 June 2023 and first has effect for the company for the year ended 31 March 2025. The company has applied the exemption under FRS102 in relation to accounting for deferred tax assets and liabilities arising from the implementation of the Pillar Two model rules.

The STERIS plc Group's assessment of the potential exposure to Pillar Two income taxes is based on the most recent tax filings, country-by-country reporting and financial statements for the constituent entities in the Group. Based on the assessment carried out so far and to the extent information is known and reasonably estimable, the Group considers that there are no countries where there is a potential impact, which would be captured in this Company. A current tax expense has therefore not been recorded in respect of Pillar Two income taxes in this Company.

Details of the company's subsidiaries at 31 March 2025 are as follows:

Amounts owed by group undertakings are trading balances repayable on demand.

Amounts owed to group undertakings are trading balances repayable on demand.

The share premium reserve represents the amount, above the nominal value, received for shares sold, less transaction costs.

Retained earnings represents the cumulative earnings of the business, net of distributions to owners.

Advantage has been taken of the exemption conferred by Section 33 Related Party Disclosures not to disclose transactions with subsidiary undertakings 100% of whose voting rights are controlled within the STERIS plc group.

The company's immediate parent undertaking is STERIS Dover Limited. The registered office of STERIS Dover Limited is 2200 Renaissance, Basing View, Basingstoke, RG21 4EQ.

The ultimate parent undertaking and controlling party is STERIS plc, a company incorporated and domiciled in Ireland.

The largest and smallest group for which consolidated financial statements are prepared is STERIS plc. Copies of the consolidated financial statements are available from its registered office at 70 Sir John Rogerson's Quay, Dublin 2, D02 R296, Ireland.