Exhibit 99.1

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INDEX TO THE UNAUDITED CONSOLIDATED INTERIM FINANCIAL STATEMENTS

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ARDAGH METAL PACKAGING S.A.

CONSOLIDATED INTERIM INCOME STATEMENT

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The accompanying notes to the unaudited consolidated interim financial statements are an integral part of these unaudited consolidated interim financial statements.

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ARDAGH METAL PACKAGING S.A.

CONSOLIDATED INTERIM STATEMENT OF COMPREHENSIVE INCOME

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The accompanying notes to the unaudited consolidated interim financial statements are an integral part of these unaudited consolidated interim financial statements.

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ARDAGH METAL PACKAGING S.A.

CONSOLIDATED INTERIM STATEMENT OF FINANCIAL POSITION

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The accompanying notes to the unaudited consolidated interim financial statements are an integral part of these unaudited consolidated interim financial statements.

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ARDAGH METAL PACKAGING S.A.

CONSOLIDATED INTERIM STATEMENT OF CHANGES IN EQUITY

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The accompanying notes to the unaudited consolidated interim financial statements are an integral part of these unaudited consolidated interim financial statements.

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ARDAGH METAL PACKAGING S.A.

CONSOLIDATED INTERIM STATEMENT OF CASH FLOWS

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The accompanying notes to the unaudited consolidated interim financial statements are an integral part of these unaudited consolidated interim financial statements.

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ARDAGH METAL PACKAGING S.A.

NOTES TO THE UNAUDITED CONSOLIDATED INTERIM FINANCIAL STATEMENTS

1.     General information

Ardagh Metal Packaging S.A. (the “Company” or “AMPSA”) was incorporated in Luxembourg on January 20, 2021. The Company’s registered office is 56, rue Charles Martel, L-2134 Luxembourg, Luxembourg.

Approximately 76% of the issued ordinary shares and 100% of the issued preferred shares of the Company are indirectly held by Ardagh Group S.A., a company registered in Luxembourg (together with its subsidiaries other than AMPSA and its subsidiaries, the “Ardagh Group”). The Board of Directors of AMPSA (the “Board”) is aware of a previously announced review of the capital structure of the Ardagh Group. The Ardagh Group capital structure is separate and distinct from AMPSA’s capital structure.

The Company is an independent, pure-play metal beverage can company, whose ordinary shares are listed on the New York Stock Exchange under the ticker symbol “AMBP.” The Company and its subsidiaries (together, the “Group”) are a leading supplier of metal beverage cans globally, with a particular focus on the Americas and Europe. The Group supplies sustainable and infinitely recyclable metal packaging to a diversified customer base of leading global, regional and national beverage producers. AMP operates 23 production facilities in Europe and the Americas and employs approximately 6,300 people.

The Group does not have any operations within Russia or Ukraine and continues to monitor and comply with the various sanctions administered by the U.S. Department of the Treasury’s Office of Foreign Assets Control, the European Union, the United Kingdom and the United Nations Security Committee that have been imposed on the Russian government and certain Russian entities and individuals.

These unaudited consolidated interim financial statements reflect the consolidation of the legal entities forming the Group for the periods presented.

The accounting policies that have been applied to the unaudited consolidated interim financial statements are described in note 3.

2.     Statement of directors’ approval

The unaudited consolidated interim financial statements were approved for issue by the Board on April 22, 2025.

3.     Summary of accounting policies

Basis of preparation

The unaudited consolidated interim financial statements of the Group for the periods ended March 31, 2025 and 2024, have been prepared in accordance with IAS 34 “Interim Financial Reporting”. The unaudited consolidated interim financial statements do not include all of the information required for full annual financial statements and should be read in conjunction with the Annual Report for the year ended December 31, 2024, which was prepared in accordance with IFRS® Accounting Standards and related interpretations as issued by the International Accounting Standards Board (“IASB”).

The unaudited consolidated interim financial statements are presented in U.S. dollar rounded to the nearest million. The functional currency of the Company is euro.

Income tax in interim periods is accrued using the effective tax rate expected to be applied to annual earnings.

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The accounting policies, presentation and methods of computation followed in the unaudited consolidated interim financial statements are consistent with those applied in the Group’s latest Annual Report.

Going concern

At the date that the unaudited consolidated interim financial statements were approved for issue by the Board, the Board has formed the judgment that there is a reasonable expectation that the Group will have adequate resources to continue in operational existence for the foreseeable future. Accordingly, these consolidated interim financial statements have been prepared on a going concern basis. In assessing whether the going concern assumption is appropriate, the Board has taken into account all available information about a period, extending to at least, March 31, 2026. In arriving at its conclusion, the Board has taken account of the Group’s current and anticipated trading performance, the evolving trade and tariff environment, together with current and anticipated levels of cash and net debt, and the availability of committed borrowing facilities, the separate and distinct AMPSA capital structure and aspects outlined in note 1, and the Company’s announcements outlined in note 18, and as a result, it is the Board’s judgment that it is appropriate to prepare the consolidated financial statements using the going concern basis.

Recent changes in accounting pronouncements

The impact of other new standards, amendments to existing standards and interpretations issued and effective for annual periods beginning on or after January 1, 2025 have been assessed by the Board. None of these new standards or amendments to existing standards effective January 1, 2025 have had or are expected to have a material impact for the Group.

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The Board’s assessment of the impact of new standards on the consolidated financial statements, which are not yet effective and which have not been early adopted by the Group, including IFRS 18 ‘Presentation and Disclosure in Financial Statements’ and Amendments to IFRS 9 and IFRS 7 – Contracts Referencing Nature-dependent Electricity, on the unaudited consolidated interim financial statements is on-going.

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4.     Segment analysis

The Group’s two operating and reportable segments, Europe and Americas, reflect the basis on which the Group’s performance is reviewed by management and presented to the Chief Operating Decision Maker (“CODM”). The CODM has been identified as being the Board and Chief Financial Officer.

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Performance of the Group is assessed based on Adjusted EBITDA. Adjusted EBITDA is the loss for the period before income tax credit, net finance expense, depreciation and amortization and exceptional operating items. Sales contracts generally provide for the pass through of metal and energy price fluctuations as well as a mechanism for the recovery of other input cost inflation, while certain contracts have tolling arrangements whereby customers arrange for the procurement of metal themselves. Consequently, the CODM evaluates the financial effects of the business activities of the reportable segments based on Adjusted EBITDA, which includes the net impact of the pass through pricing model operated by the business.

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Segmental revenues are derived from sales to external customers. Inter-segmental revenue is not material.

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Reconciliation of loss for the period to Adjusted EBITDA

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Segment results for the three months ended March 31, 2025 and 2024 are:

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One customer accounted for greater than 10% of total Group revenue across both reportable segments in the three months ended March 31, 2025 (2024: one).

Within each reportable segment our respective packaging containers have similar production processes and classes of customers. Further, they have similar economic characteristics, as evidenced by similar profit margins, similar degrees of risk and similar opportunities for growth. Based on the foregoing, we do not consider that they constitute separate product lines and, therefore, additional disclosures relating to product lines are not necessary.

The following illustrates the disaggregation of revenue by destination for the three months ended March 31, 2025:

The following illustrates the disaggregation of revenue by destination for the three months ended March 31, 2024:

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The following illustrates the disaggregation of revenue based on the timing of transfer of goods and services:

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5.     Exceptional items

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Exceptional items are those that in management’s judgment need to be disclosed by virtue of their size, nature or incidence.

2025

A net credit of $3 million has been recognized as exceptional items in the three months ended March 31, 2025, primarily comprising:

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2024

A net credit of $7 million has been recognized as exceptional items in the three months ended March 31, 2024, primarily comprising:

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6.     Net finance expense

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*Includes interest related to Senior Secured Green Notes, Senior Green Notes and Senior Secured Term Loan.

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During the period ended March 31, 2025, the Group recognized $6 million (2024: $6 million) of interest paid related to lease liabilities in cash used in operating activities in the unaudited consolidated interim statement of cash flows. Other net finance expense is primarily comprised of fees incurred on the Group’s receivables financing arrangement.

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7.   Earnings per share

Basic earnings per share (“EPS”) is calculated by dividing the loss for the period attributable to equity holders by the weighted average number of ordinary shares outstanding during the period.

The following table reflects the income statement loss and share data used in the basic EPS calculations:

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Diluted loss per share is consistent with basic loss per share, as there are no dilutive potential shares during the periods presented above.

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Please refer to note 9 for details of any transactions involving the ordinary shares for the three months ended March 31, 2025.

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8.     Intangible assets and property, plant and equipment

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At March 31, 2025, the carrying amount of goodwill included within intangible assets was $987 million (December 31, 2024: $966 million).

At March 31, 2025, the carrying amount of the right-of-use assets included within property, plant and equipment was $381 million (December 31, 2024: $385 million).

The Group recognized a depreciation charge of $78 million in the three months ended March 31, 2025 (2024: $73 million), of which $24 million (2024: $21 million) relates to right-of-use assets.

Impairment test for goodwill

Goodwill is not subject to amortization and is tested annually for impairment following the approval of the annual budget (normally at the end of the financial year), or more frequently if events or changes in circumstances indicate a potential impairment.

Management has considered whether any impairment indicators existed at the reporting date, and has concluded that the carrying amount of the goodwill is fully recoverable as at March 31, 2025.

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Issued and fully paid shares:

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There were no material share transactions in the three months ended March 31, 2025.

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10.     Financial assets and liabilities

At March 31, 2025 the Group’s net debt and available liquidity was as set out below:

The fair value of the Group’s total borrowings, excluding lease obligations at March 31, 2025 is $3,234 million (December 31, 2024: $3,215 million).

A number of the Group’s borrowing agreements contain certain covenants that restrict the Group’s flexibility in areas such as the incurrence of additional indebtedness (primarily maximum secured borrowings to Adjusted EBITDA and a minimum Adjusted EBITDA to interest expense), payment of dividends and incurrence of liens.

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The Global Asset Based Loan Facility is subject to a fixed charge coverage ratio covenant if 90% or more of the facility is drawn. The facility also includes cash dominion, representations, warranties, events of default and other covenants that are of a nature customary for such facilities.

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At December 31, 2024 the Group’s net debt and available liquidity was as follows:

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The maturity profile of the Group’s net borrowings is as follows:

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Earnout Shares and Warrants

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Please refer to note 12 for further details about the recognition and measurement of the Earnout Shares as well as the Private and Public Warrants.

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Financing activity

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The decrease in lease obligations from $374 million at December 31, 2024 to $370 million at March 31, 2025, primarily reflects $25 million of principal repayments, partly offset by $21 million of new lease liabilities and foreign currency movements in the three months ended March 31, 2025.

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At March 31, 2025 the Group had no cash drawings (December 31, 2024: $nil) on the Global Asset Based Loan facility, which has a maximum cash capacity of $365 million when sufficient working capital is available to fully collateralize the facility. Working capital collateralization limited the available borrowing base to $306 million at March 31, 2025.

Fair value methodology

There has been no change to the fair value hierarchies for determining and disclosing the fair value of financial instruments.

Fair values are calculated as follows:

Cross currency interest rate swaps

The Group hedges certain of its borrowing and interest payable thereon using CCIRS, with a net liability position at March 31, 2025 of $22 million (December 31, 2024: $13 million net liability).

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Net investment hedges in foreign operations

The Group has designated $350 million (2024: $350 million) of its 6.000% Senior Secured Green Notes due 2027 as a net investment hedge. A gain of $14 million (2024: loss of $8 million) was recognized in relation to this hedge in the Consolidated Statement of Comprehensive Income for the three months ended March 31, 2025.

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Forward foreign exchange contracts

The Group operates in a number of currencies and, accordingly, hedges a portion of its currency transaction risk. Certain forward contracts are designated as cash flow hedges for accounting purposes.

The fair values are based on Level 2 valuation techniques and observable inputs including the contract prices. The fair value of these contracts when initiated is $nil; no premium is paid or received.

Virtual Power Purchase Agreement

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As part of our sustainability strategy to achieve our climate targets, the Group entered into a virtual power purchase agreement (“vPPA”) in July 2024. The renewable energy generation facility underlying the agreement is managed by the operator.

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The Group has no rights of determination or control over the use of the facilities. The benefits accruing from the virtual power purchase agreement come in the form of two components: a quarterly financial flow from the Group to the developer if the respective spot electricity price falls below an agreed floor price, and certificates that the Group receives as proof of origin for electricity from renewable energies.

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The valuation applied a Black Scholes model, using a key data input for the risk-free rate of 2.2% (December 31, 2024: 2.1%), with an estimated volatility of 32% (December 31, 2024: 31%). The estimated fair market value at March 31, 2025 was a liability of $3 million (December 31, 2024: asset of $2 million), which has been reflected within non-current derivative financial instruments, representing the value of the certificates to be received by the Group and the option value of the agreed floor price. An increase or decrease in volatility of 5% would not result in a material change to the fair market value as at March 31, 2025.

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11.   Employee benefit assets and obligations

Employee benefit assets and obligations at March 31, 2025 have been reviewed in respect of the latest discount rates, inflation rates and asset valuations. A net re-measurement gain of $7 million (2024: gain of $5 million) has been recognized in the Consolidated Interim Statement of Comprehensive Income for the three months ended March 31, 2025.

The re-measurement gain recognized for the three months ended March 31, 2025 consisted of a decrease in the obligations of $9 million (2024: decrease of $6 million), partly offset by a decrease in asset valuations of $2 million (2024: decrease of $1 million).

12.   Other liabilities and provisions

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Other liabilities

Earnout shares

The Ardagh Group has a contingent right to receive up to 60.73 million additional shares in the Company (the “Earnout Shares”). The Earnout Shares are issuable by AMPSA to the Ardagh Group subject to attainment of certain share price hurdles, with equal amounts of shares at $13, $15, $16.50, $18, and $19.50, respectively, over a five-year period ending on January 31, 2027. In accordance with IAS 32 “Financial Instruments: Presentation”, the arrangement has been assessed to determine whether the Earnout Shares represent a liability or an equity instrument. As the arrangement may result in AMPSA issuing a variable number of shares in the future, albeit capped at a total of 60.73 million shares, the Earnout Shares have, in accordance with the requirements of IAS 32, been recognized as a financial liability measured at fair value in the consolidated interim financial statements. A valuation assessment was performed for the purpose of determining the financial liability using a Monte Carlo simulation using key data inputs for: share price hurdles; risk-free rate 4% (December 31, 2024: risk-free rate 4%); and traded closing AMP share price, with estimates of volatility 55% (December 31, 2024: volatility 59%) and dividend yield. The estimated valuations of the liability at March 31, 2025, and December 31, 2024, were $5 million and $10 million, respectively. Changes in the fair market valuation of the Earnout Shares of $5 million have been reflected as exceptional finance income within net finance expense for the three months ended March 31, 2025 (March 31, 2024: $16 million). Any increase or decrease in volatility of 5% would result in an increase or decrease in the liability as at March 31, 2025, of approximately $3 million (December 31, 2024: $4 million).  

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Warrants

AMP warrants are exercisable for the purchase of ordinary shares in AMPSA at an exercise price of $11.50 over a five-year period. In accordance with IAS 32, those warrants have been recognized as a financial liability measured at fair value in the consolidated interim financial statements. For certain warrants issued to the former sponsors of Gores Holdings V, Inc. (“Private Warrants”) a valuation was performed for the purpose of determining the financial liability. The valuation applied a Black Scholes model, using a key data input for the risk-free rate 4% (December 31, 2024: risk-free rate 4%), with estimates for volatility 55% (December 31, 2024: volatility 59%) and dividend yield. All other outstanding warrants (“Public Warrants”) were valued using the traded closing prices of the AMP warrants. The estimated valuations of the liability at March 31, 2025, and December 31, 2024, were $nil and $1 million, respectively. Changes in the valuation of the Public and Private Warrants of $1 million have been reflected as exceptional finance income within net finance expense for the three months ended March 31, 2025 (March 31, 2024: $1 million). Any increase or decrease in volatility of 5% would not result in a significant change in the fair value of the Private Warrants at March 31, 2025 (December 31, 2024: $nil).

Put and call arrangements

In conjunction with the NOMOQ acquisition completed in February 2023, the Group has entered into put and call option arrangements for the acquisition of the outstanding non-controlling interest (“NCI”), part of which are treated as a compensation arrangement for accounting purposes, and could result in future payments to the holders of such NCI, depending on the future performance of NOMOQ. The Group has recognized the fair value of the obligation at March 31, 2025 of $8 million (December 31, 2024: $7 million) within other liabilities and provisions.  

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13.   Cash used in operating activities