The Directors present the strategic report for the period ended 29 December 2024.

The principal activity of the company during the period was that of a holding company for the Immunodiagnostic Systems Group.

The Immunodiagnostic Systems Group is a specialist in-vitro diagnostic solution provider to the clinical laboratory market. We develop, manufacture and market innovative immunoassays and automated immunoanalyser technologies to provide improved diagnostic outcomes for patients.

The company generated a profit before tax for the period ended 29 December 2024 of £1,011,641 (2023: £210,213). The increase in the current period is mainly a result of the exceptional costs within the prior year for the loss of office of two Directors during that period.

Cash at bank and in hand increased to £3,510,420 (2023: £1,728,528), predominantly due to increased loan repayments from Group companies.

Future Outlook

The Company will continue to operate as a parent company for the trading subsidiaries in the Immunodiagnostics Systems Group.

Financial risk and risk management

The Company's financial instruments comprise cash at bank and in hand, amounts owed by and due to subsidiary undertakings, trade debtors and trade creditors.

The main risks from the Company's financial instruments are liquidity risk and foreign currency risk. The policies for managing these are regularly reviewed and agreed by the Board.

Interest rate risk

The Company finances its operations from retained profits. The Company's policy on interest rate management is agreed at director level and is reviewed on an ongoing basis. There is no external borrowing as at 29 December 2024 (2023: £nil) so there is no external interest rate risk to manage.

Liquidity/Cashflow risk

Facilities are reviewed regularly by the Directors to ensure all entities within the Group can meet their short-term obligations. This short-term flexibility is achieved through the use of intragroup funding.

Foreign currency risk

The Company has subsidiaries, which operate in Europe. Their revenues and expenses are denominated substantially in Euro. Excess currency is transferred back to the Holding Company regularly and translated into Pound Sterling, to avoid unnecessary exposure.

The Company itself does not engage in hedging activities, however Revvity Inc. acts on behalf of the Company and the wider Revvity Inc. Group. The Company provides forecasts which are used by Revvity to enter hedging contracts. At the end of the period the Company is allocated its share of the gain or loss during the period.

Legal and Regulatory Risk

The Company operates in a sector which is highly regulated. It seeks to reduce this risk by ensuring that there are policies and procedures in place that foster quality as a number one priority and training is in place to ensure compliance is understood. The Company has both internal legal and regulatory assurance actors.

Staff Turnover Risk

The Company's continued success is dependent on key employees and their ongoing relationships with key stakeholders such as suppliers. Increased staff turnover and the disruption this may cause, can impact execution of strategy and potentially impact shareholder value creation.

The Company performs succession planning within the management team to ensure any disruption is kept to a minimum.

Cyber Risk

As we and our suppliers increasingly digitalise our businesses, there is an increased risk that third parties may seek to disrupt our online business operations, steal customer data or perpetrate acts of fraud using digital media. We are focused on maintaining a robust and secure IT environment that protects our customer and corporate data. This involves specific activities, such as penetration testing of our key systems, coupled with continued education of employees' around cyber risk. We have invested in a state- of-the-art antivirus/IT security suite to help mitigate this risk.

Holding Company

As a Holding Company, the risks and uncertainties are consistent with those of the subsidiaries companies which are trading. The company's intercompany balances with these subsidiaries have been assessed for impairment.

As a Holding Company for subsidiaries, Immunodiagnostic Systems Holdings Limited does not hold any specific key performance indicators.

On behalf of the Board

The Directors present their Annual Report and financial statements for the period ended 29 December 2024.

Immunodiagnostic Systems Holdings Limited is a private limited company, incorporated and domiciled in England.

During the period the Company recorded profit after tax of £988,658 (2023: £237,376).

The Directors proposed and approved payments of dividends related to the period ended 29 December 2024 totalling £12,200,000 (2023: £nil).

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

As permitted by the Company's Articles of Association, the company has made qualifying third-party Indemnity provisions for each Director of the Company. Indemnities for each Director of the Company have been granted to D Beecker on 3 January 2023 and N Mitton on 1 January 2024 (appointed 1 January 2024 and resigned 29 September 2025). These indemnities were in force throughout this financial period and at the date of approval of these financial statements.

Please see Strategic Report for details of future developments.

In accordance with the company's articles, a resolution proposing that Azets Audit Services be reappointed as auditor of the company will be put at a General Meeting.

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 Directors have, at the time of approving the financial statements, considered the applicability of the going concern basis in the preparation of these financial statements. This included a consideration of the Company's cash reserves (due to intercompany loan funding) and internal forecasts of the financial results. In addition, the Company has received a letter of support from Revvity Inc, their ultimate parent company to ensure financial support is provided going forward, as such, the Directors have a reasonable expectation that the Company has adequate resources to continue in operational existence for the foreseeable future. Thus, they 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 financial statements in accordance with United Kingdom Generally Accepted Accounting Practice (United Kingdom Accounting Standards and applicable law). 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 and then apply them consistently;

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

• 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.

We have audited the financial statements of Immunodiagnostic Systems Holdings Limited (the 'company') for the period ended 29 December 2024 which comprise the statement of comprehensive income, the balance sheet, the statement of changes in equity and notes to the financial statements, including 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 29 December 2024 and of its profit for the period 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 at least twelve months from when the financial statements are authorised 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 period 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 directors' 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, 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.

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.

Extent to which the audit was considered capable of detecting irregularities, including fraud

Irregularities, including fraud, are instances of non-compliance with laws and regulations. We design procedures in line with our responsibilities, outlined above and on the Financial Reporting Council’s website, to detect material misstatements in respect of irregularities, including fraud.

We obtain and update our understanding of the entity, its activities, its control environment, and likely future developments, including in relation to the legal and regulatory framework applicable and how the entity is complying with that framework.  Based on this understanding, we identify and assess the risks of material misstatement of the financial statements, whether due to fraud or error, design and perform audit procedures responsive to those risks, and obtain audit evidence that is sufficient and appropriate to provide a basis for our opinion.  This includes consideration of the risk of acts by the entity that were contrary to applicable laws and regulations, including fraud.

We identified the following applicable laws and regulations as those most likely to have a material impact on the financial statements: Health and Safety; employment law (including the Working Time Directive); and compliance with the UK Companies Act.

In response to the risk of irregularities and non-compliance with laws and regulations, including fraud, we designed procedures which included:

• Enquiry of management and those charged with governance around actual and potential litigation and claims as well as actual, suspected and alleged fraud; 

• Assessing the extent of compliance with the laws and regulations considered to have a direct material effect on the financial statements or the operations of the company through enquiry and inspection; 

• Reviewing financial statement disclosures and testing to supporting documentation to assess compliance with applicable laws and regulations;

• Performing audit work over the risk of management bias and override of controls, including testing of journal entries and other adjustments for appropriateness, evaluating the business rationale of significant transactions outside the normal course of business and reviewing accounting estimates for indicators of potential bias. 

Because of the inherent limitations of an audit, there is a risk that we will not detect all irregularities, including those leading to a material misstatement in the financial statements or non-compliance with regulation.  This risk increases the more that compliance with a law or regulation is removed from the events and transactions reflected in the financial statements, as we will be less likely to become aware of instances of non-compliance.  The risk of not detecting a material misstatement resulting from fraud is higher than for one resulting from error, as fraud may involve collusion, forgery, intentional omissions, misrepresentations, or the override of internal control.

Use of our report

This report is made solely to the company's members, as a body, 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 members those matters we are required to state to them 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 members as a body, for our audit work, for this report, or for the opinions we have formed.

The profit and loss account has been prepared on the basis that all operations are continuing operations.

Immunodiagnostic Systems Holdings Limited is a private company limited by shares incorporated in England and Wales. The registered office is 10 Didcot Way, Boldon Business Park, Boldon, Tyne And Wear, NE35 9PD.

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 sterling, 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 financial instruments not measured at fair value; 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; The information is provided in the consolidated financial statement disclosure of Revvity Inc,

• Section 26 ‘Share based Payment’: Share-based payment expense charged to profit or loss, reconciliation of opening and closing number and weighted average exercise price of share options, how the fair value of options granted was measured, measurement and carrying amount of liabilities for cash-settled share-based payments, explanation of modifications to arrangements;

• Section 33 ‘Related Party Disclosures’: Compensation for key management personnel on the basis that it is a qualifying entity and its ultimate parent company, Revvity Inc, includes the company's cash flows in its consolidated financial statements.

The financial statements of the company are consolidated in the financial statements of Revvity Inc. These consolidated financial statements are available from its registered office, 77 4th Avenue, Waltham, Massachusetts, 02451 USA.

Atruet the time of approving the financial statements, the Directors have a reasonable expectation that the Company has adequate resources to continue in operational existence for the foreseeable future. This included a consideration of the company's cash reserves (intercompany loan) and internal forecasts of the financial results. Even when considering an extreme worst-case scenario, the Immunodiagnostic Systems Group still has sufficient cash reserves available one year from the date of approval of these financial statements. In addition, the company has received a letter of support from Revvity Inc, the ultimate parent company to ensure financial support is provided going forward, as such, the Directors have a reasonable expectation that the Company has adequate resources to continue in operational existence for the foreseeable future. Thus, the Directors continue to adopt the going concern basis of accounting in preparing the financial statements.

Tangible fixed assets are initially measured at cost and subsequently measured at cost, net of depreciation and any impairment losses.

Depreciation is recognised so as to write off the cost or valuation of assets less their residual values over their useful lives on the following bases:

The gain or loss arising on the disposal of an asset is determined as the difference between the sale proceeds and the carrying value of the asset, and is credited or charged to profit or loss.

Fixed asset investments are stated at cost after making provision for any impairment in the value.

At each reporting period end date, the Company reviews the carrying amounts of its fixed assets to determine whether there is any indication that those assets have suffered an impairment loss. If any such indication exists, the recoverable amount of the asset is estimated in order to determine the extent of the impairment loss (if any). Where it is not possible to estimate the recoverable amount of an individual asset, the company estimates the recoverable amount of the cash-generating unit to which the asset belongs.

Recoverable amount is the higher of fair value less costs to sell and value in use. In assessing value in use, the estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset for which the estimates of future cash flows have not been adjusted.

If the recoverable amount of an asset (or cash-generating unit) is estimated to be less than its carrying amount, the carrying amount of the asset (or cash-generating unit) is reduced to its recoverable amount. An impairment loss is recognised immediately in profit or loss, unless the relevant asset is carried at a revalued amount, in which case the impairment loss is treated as a revaluation decrease.

Recognised impairment losses are reversed if, and only if, the reasons for the impairment loss have ceased to apply. Where an impairment loss subsequently reverses, the carrying amount of the asset (or cash-generating unit) is increased to the revised estimate of its recoverable amount, but so that the increased carrying amount does not exceed the carrying amount that would have been determined had no impairment loss been recognised for the asset (or cash-generating unit) in prior years. A reversal of an impairment loss is recognised immediately in profit or loss, unless the relevant asset is carried at a revalued amount, in which case the reversal of the impairment loss is treated as a revaluation increase.

Cash and cash equivalents are basic financial assets and include cash in hand, deposits held at call with banks.

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 balance sheet 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 debtors and cash and bank balances, 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.

Trade receivables

Trade receivables are included at the lower of invoiced value and recoverable amount. A provision for impairment is made where there is objective evidence that the Company will not be able to collect all amounts due.

Cash and cash equivalents

Cash and cash equivalents comprise cash in hand and deposits held at call with banks.

Investments

Investments in subsidiary undertakings and associates are recorded at cost in the balance sheet. They are tested for impairment when there is objective evidence of impairment. Any impairment losses are recognised in profit or loss in the period they occur.

Other investments, which are not classified as trading investments, are classified as financial assets and financial liabilities and are initially recognised at fair value. They are subsequently measured at their amortised cost using the effective interest rate method less any provision for impairment.

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.

Financial liabilities and equity instruments are classified according to the substance of the contractual arrangements entered into. An equity instrument is any contract that evidences a residual interest in the assets of the company after deducting all of its liabilities.

Trade payables

Trade payables are included at the gross liability, including any relevant value added tax.

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.

Equity comprises the following:

• Share capital - representing the nominal value of equity shares.

• Share premium - representing the excess over nominal value of the fair value of consideration received for equity shares, net of expenses the share issue.

• Retained earnings - including all current and prior period results as disclosed in the income statement.

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 profit and loss account 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 profit and loss account, 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.

Short term benefits, including holiday pay and other similar non-monetary benefits, are recognised as an expense in the period in which the service is received.

Annual bonus plan

The company operates a number of annual bonus plans for employees. An expense is recognised in the profit and loss account when the group has a legal or constructive obligation to make payments under the plans as a result of past events and a reliable estimate of the obligation can be made.

The Company operates a defined contribution pension scheme for employees. The assets of the scheme are held separately from those of the company. The annual contributions payable are charged to the statement of comprehensive income. Amounts not paid are shown in accruals in the balance sheet.

Monetary assets and liabilities in foreign currencies are translated into Pound Sterling at the rates of exchange ruling at the balance sheet date. Transactions in foreign currencies are translated into Pound Sterling at the rate of exchange ruling at the date of the transaction. Exchange differences are considered in arriving at the operating profit. Non-monetary assets and liabilities that are measured at historical cost in a foreign currency (e.g. property, plant and equipment purchased in a foreign currency) are translated using the exchange rate prevailing at the date of the transaction. Non-monetary assets and liabilities carried at fair value that are denominated in foreign currencies are translated at the rates prevailing at the date when the fair value was determined. Gains and losses arising on retranslation are recognised in the income statement for the period, except for exchange differences on non-monetary assets and liabilities, which are recognised directly in other comprehensive income when the changes in fair value are also recognised directly in other comprehensive income.

The Company itself does not engage in hedging activities, however, Revvity Inc. acts on behalf of the company and the wider Revvity Inc. Group. The Company provides forecasts which are used by Revvity to enter hedging contracts. At the end of period the company is allocated its share of the gain or loss during the period. The gains or losses arising are recognised 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 estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognised in the period in which the estimate is revised where the revision affects only that period, or in the period of the revision and future periods where the revision affects both current and future periods.

The directors do not consider there to be any judgements, in the application of these accounting policies that have significant effect on the financial statements and estimates with a significant risk of material adjustment in the next year.

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

Their aggregate remuneration comprised:

The number of Directors for whom retirement benefits are accruing under defined contribution schemes amounted to 1 (2023 - 2).

Details of the company's subsidiaries at 29 December 2024 are as follows:

The amounts owed by Group undertakings due within one year are unsecured and repayable on demand. Interest is recharged relative to EURIBOR or risk free rates produced by the Bank of England with margin of between 1.5% and 3%. Amounts due after one year are due from Revvity (UK) Holdings Limited, the immediate parent and repayable by November 2026 and are subject to interest of SONIA plus 0.3%.

Amounts due to Group undertakings are unsecured and repayable on demand. Interest is charged relative to EURIBOR or risk-free rates produced by the Bank of England with margin of between 1.5% and 3%.

The following are the major deferred tax liabilities and assets recognised by the company and movements thereon:

The Company operates a defined contribution scheme. The assets of the scheme are held separately from those of the Company in an independently administered fund. The pension cost charge represents contributions payable by the Company to the fund and amounted to £78,919 (2023: £189,617) in note above. At the period end, £nil (2023: £Nil) of these pension contributions had not yet been paid to the pension fund.

Equity comprises the following:

• Share capital - representing the nominal value of equity shares.

• Share premium - representing the excess over nominal value of the fair value of consideration received for equity shares, net of expenses of the share issue.

• Retained earnings - including all current and prior period results as disclosed in the statement of comprehensive income.

Trading Transactions

The company is exempt from disclosing other related party transactions as they are with other companies that are wholly owned within the Immunodiagnostic Systems Holdings Limited group or within Revvity Inc. group.

Remuneration of key management personnel

The remuneration of the Directors, who are the key management personnel of the group is set out in Note 6.

The total employers' national insurance contributions paid on behalf of the directors was £22,024 (2023: £22,668).

The immediate parent company is Revvity (UK) Holdings Limited.

The ultimate parent company is Revvity Inc. Revvity Inc is the smallest and largest group of undertakings which consolidate the results of the entity. Consolidated financial statements are available from 77 4th Avenue, Waltham, Massachusetts, 02451 USA.