0001193125-26-319072 | 10-Q | XBRL Viewer

[1]	The nominal value, shares issued and outstanding and additional paid-in capital have been adjusted for the 2025 balance. Refer to Note 22 for more information.

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

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+ Details

Long-term debt - current and non-current - Summary of undiscounted future cash outflows of long-term debt (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Debt Instrument [Line Items]
Principal	$ 2,627.9
Interest	675.2
Total	3,303.1
2026 [Member]
Debt Instrument [Line Items]
Principal	7.6
Interest	64.8
Total	72.4
2027 [Member]
Debt Instrument [Line Items]
Principal	15.8
Interest	127.9
Total	143.7
2028 [Member]
Debt Instrument [Line Items]
Principal	14.6
Interest	127.4
Total	142.0
2029 [Member]
Debt Instrument [Line Items]
Principal	15.1
Interest	126.3
Total	141.4
2030 [Member]
Debt Instrument [Line Items]
Principal	44.7
Interest	125.2
Total	169.9
Thereafter [Member]
Debt Instrument [Line Items]
Principal	2,530.1
Interest	103.6
Total	$ 2,633.7

Other assets (Tables)

6 Months Ended

Jun. 30, 2026

Other Assets [Abstract]

Summary of other assets

Other assets are comprised

the

following:


(in millions of $)	June 30, 2026		December 31, 2025
Governmental grants		28.3		34.4
Contract assets		68.1		58.8
Non-income based tax receivables		53.4		36.8
Income tax receivables		29.8		25.2
Other		28.3		25.6

Other current assets		207.9		180.8
Operating lease right-of-use assets		80.3		68.4
Contract acquisition costs		15.6		15.3
Deferred tax assets		16.6		15.1
Derivative instruments		13.3		0.1
Equity method investments		6.6		—
Other		8.7		5.5

Other non-current assets		141.1		104.4

Fair value disclosures - Summary of fair values of contingent consideration (Detail) - Contingent Consideration [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance as of January 1	$ 2.7	$ 1.4
Additions	0.0	0.0
Adjustments/Payments	(1.7)	0.9
Remeasurement effects	0.0	0.0
Balance as of June 30	$ 1.0	$ 2.3

Accumulated other comprehensive income (loss) - Summary Of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 236.2	$ 807.0	$ 228.1	$ 762.7
Ending Balance	219.1	890.8	219.1	890.8
Currency translation reserve
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(15.3)	(40.4)	(23.5)	(51.7)
Other comprehensive income (loss), net of taxes	7.8	26.3	16.0	37.6
Reclass from AOCI, net of taxes	0.0	0.0	0.0	0.0
Ending Balance	(7.5)	(14.1)	(7.5)	(14.1)
Cash flow hedge reserve
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(0.9)	(5.2)	(0.6)	(3.3)
Other comprehensive income (loss), net of taxes	(7.9)	(5.9)	(7.2)	(7.5)
Reclass from AOCI, net of taxes	(1.3)	0.3	(2.3)	0.0
Ending Balance	(10.1)	(10.8)	(10.1)	(10.8)
Defined benefit plans reserve
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	2.1	(0.3)	3.5	(0.2)
Other comprehensive income (loss), net of taxes	0.4	0.7	(1.0)	0.6
Reclass from AOCI, net of taxes	0.0	0.0	0.0	0.0
Ending Balance	2.5	0.4	2.5	0.4
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(14.1)	(45.9)	(20.6)	(55.2)
Other comprehensive income (loss), net of taxes	0.3	21.1	7.8	30.7
Reclass from AOCI, net of taxes	(1.3)	0.3	(2.3)	0.0
Ending Balance	$ (15.1)	$ (24.5)	$ (15.1)	$ (24.5)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity.

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+ Details

Operations and summary of significant accounting policies

6 Months Ended

Jun. 30, 2026

Accounting Policies [Abstract]

Operations and summary of significant accounting policies

Note 1. Operations and summary of significant accounting policies

1.1. Organization. INNIO N.V. (the “Company,” “INNIO,” or the “Group”), formerly known as INNIO Holding GmbH, is a global provider of distributed power generation equipment and services operating primarily under the Jenbacher and Waukesha brands. Refer to section 1.2 Reorganization, below for further details. The Group designs, manufactures, and services

gas-fueled

reciprocating engines and related solutions for industrial, commercial, municipal and data center applications, with primary operations in Austria, the United States, and Canada, supported by a worldwide services network. The Group reports financial results through two operating segments: Equipment and Services.

The Equipment segment designs, manufactures, and sells new engines, product-related equipment and related solutions addressing data center, power solutions, and compression business lines.

The Services segment provides aftermarket services through an engine’s lifecycle, including long-term service agreements, spare parts, overhauls, remanufacturing of engines and components, digital solutions, and service-related activities.

1.2. Reorganization. On September 26 2025, the Company completed a reorganization of its legal entity structure, whereby the accounting predecessor INNIO Group Holding GmbH became an indirect wholly-owned subsidiary of INNIO Holding GmbH. The Reorganization was accounted for as a transaction under common control and reflected prospectively from the date of transfer. See our audited consolidated financial statements for the year ended December 31, 2025 as disclosed in our final prospectus filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended, in connection with our IPO (the “Prospectus”).

On June 3, 2026, INNIO Holding GmbH was converted, without interruption of its existence as legal entity, from a German limited liability company (

Gesellschaft mit beschränkter Haftung

) into INNIO Group Holding B.V., a Dutch private company with limited liability (

besloten vennootschap met beperkte aansprakelijkheid

). Following such conversion, the nominal value of the then

25,000

outstanding common shares in INNIO Group Holding B.V. was reduced to EUR

0.04

, and

749,975,000

new common shares were issued to our Principal Shareholder.

Thereafter, without interruption of its existence as legal entity, INNIO Group Holding B.V. was converted into a public company under Dutch law (

naamloze vennootschap

), and our legal name changed to INNIO N.V. Refer to Note 22 – Earnings (loss) per share for more information.

1.3. Basis of presentation. The unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”), pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) applicable to interim financial statement and present the historical results of operations, comprehensive income (loss) and changes in equity for the three and six months ended June 30, 2026 and 2025, the financial position as of June 30, 2026 and December 31, 2025 and cash flows for the six months ended June 30, 2026 and 2025. Certain information related to our significant accounting policies and note disclosures have been condensed or omitted. In the opinion of management, the unaudited Consolidated Financial Statements for the interim periods presented include all adjustments necessary to present a fair statement of the results for such interim periods. These unaudited consolidated financial statements should be read in conjunction with our annual audited consolidated financial statements, related notes and significant accounting policies for the fiscal year ended December 31, 2025, as disclosed in our final prospectus filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended, in connection with our IPO (the “Prospectus”). The unaudited consolidated financial statements are presented in millions of U.S. dollars (“USD”), unless otherwise stated. Certain amounts may not sum due to rounding and percentages are calculated based on underlying amounts expressed in

millions.

1.4. Use of Estimates. The preparation of the unaudited consolidated financial statements in conformity with U.S. GAAP requires management to make estimates based on assumptions about current, and for certain estimates, future, economic and market conditions that affect reported amounts and related disclosures. These assumptions are deemed to be reasonable under the circumstances and although current estimates contemplate current and expected future conditions, as applicable, it is reasonably possible that actual conditions could differ from expectations, which could materially affect the results of operations, financial position and cash flows.

Estimates are used for, but are not limited to, determining the point in time when control transfers to the customer for revenues, contract margins and costs to complete the project when applying the

percentage-of-completion

method for revenues, recognition and measurement of warranty obligations, impairment assessments of goodwill and indefinite-lived intangible assets, contingent consideration liabilities, fair-value measurements, and the recognition and measurement of deferred tax asset valuation allowances.

For further information on our significant accounting policies, please refer to our annual audited consolidated financial statements for the fiscal year ended December 31, 2025, filed with the SEC pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended, in connection with our IPO (the “Prospectus”).

1.5 Equity method investments.

Equity method investments represent investments in entities over which the Company has the ability to exercise significant influence, but not control. The initial investments in these entities are recorded at cost and subsequently adjusted for the Company’s proportionate share of the investees’ net income or losses. Where the Company executes transactions with its equity method investments, its proportionate share in any profits or losses of an equity method investment is eliminated until realization of the related profit and losses by the investee. Dividends received from equity method investees reduce the carrying amount of investment when received and do not impact the Company’s earnings. Equity method investments are assessed for other-than-temporary impairment when indicators suggest that its carrying amount may not be recoverable. Investments are presented within Other

non-current

assets in the consolidated statements of financial position and the Company’s share of the results from these investments is reported in consolidated statements of operations within Other (income) expense - net.

As of June 30, 2026, the Company’s equity method investments balance consists of a 24.9%

interest in Nordic (Luxembourg) S.à r.l. (“Nordic LuxCo”). The equity method investment is recognized in Other

non-current

assets in the consolidated statements of financial position. The loss from equity method investments for the three and six months ended June 30, 2026 was $0.7 million and $0.7 million, respectively. Refer to Note 25 – Related party transactions and Note 26 – Variable interest entities for further information.

1.6. Recently adopted accounting standards.

Financial instruments - Credit losses (ASU

2025-05,

Topic 326). In July 2025, the Financial Accounting Standards Board (“FASB”) issued ASU

2025-05,

which amends ASC

326-20

to provide a practical expedient that current conditions as of the balance sheet date do not change for the remaining life of the asset when estimating expected credit losses for current accounts receivable and current contract assets arising from transactions accounted for under ASC 606. Beginning fiscal 2026, the Company adopted ASU

2025-05

and applied the practical expedient, which did not have a material impact on the consolidated financial statements or disclosures.

1.7. Accounting standards issued but not yet adopted.

Disaggregation of income statement expenses (ASU 2024-03, Subtopic 220-40)

. In November 2024, the FASB issued ASU

2024-03,

which requires tabular disaggregation of specified natural expense categories (for example, employee compensation, depreciation, amortization of intangibles, and inventory-related costs) that are included in income statement captions such as cost of sales and SG&A. The amendments are effective for annual periods beginning after December 15, 2026 (calendar year 2027), with interim periods beginning after December 15, 2027. The Company is evaluating the impact; no recognition or measurement changes are expected, but note disclosure may expand upon adoption.

Derivatives and revenue recognition (ASU 2025-07, Topics 815 and 606).

In September 2025, the FASB issued ASU

2025-07,

Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606): Derivatives Scope Refinements and Scope Clarification for Share-Based Noncash Consideration from a Customer in a Revenue Contract. The amendments refine the scope of derivative accounting by introducing a new scope exception for certain

non-exchange-traded

contracts and clarify the accounting for share-based noncash consideration received from customers in revenue arrangements. The amendments are effective for fiscal years beginning after December 15, 2026, with early adoption permitted. The Company is evaluating the impact of the amendments on its accounting policies and disclosures; no recognition or measurement changes are expected.

Derivatives and hedging (ASU 2025-09, Topic 815)

. In November 2025, the FASB issued ASU 2025-09, Derivatives and Hedging (Topic 815): Hedge Accounting Improvements, which makes targeted amendments to hedge accounting guidance intended to better align accounting with entities’ risk management activities and to clarify certain aspects of cash flow, fair value, and net investment hedges. The amendments are effective for fiscal years beginning after December 15, 2026 for public business entities and after December 15, 2027 for all other entities, with early adoption permitted. The Company is evaluating the impact of the amendments on its hedge accounting policies and disclosures; no recognition or measurement changes are expected.

Government grants (ASU 2025-10, Topic 832).

In December 2025, the FASB issued ASU 2025-10, which adds guidance to ASC 832 on the recognition, measurement, and presentation of government grants. The amendments are effective for fiscal years beginning after December 15, 2028, with early adoption permitted. The Company is evaluating the impact of these amendments.

All other ASUs issued but not yet adopted were assessed and determined that they either were not applicable or were not expected to have a material impact on our financial statements.

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 30, 2026
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Derivative instruments and hedge accounting - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months	$ 0.1	$ (0.5)
Foreign Currancy Hedge [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months		$ 14.1

Goodwill and intangible assets - Additional information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$ 22.3	$ 22.8	$ 44.7	$ 45.4

- Definition

Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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+ Details

Long-term debt - current and non-current - Summary of current and non-current portions of long-term debt (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Debt Disclosure [Abstract]
Long-term debt—net	$ 2,607.1	$ 2,647.4
Current portion of Long-term debt—net	11.6	11.4
Total	$ 2,618.7	$ 2,658.8

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

+ Details

Accounts receivable - net - Summary of Accounts receivable - net (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Customer receivables	$ 242.6	$ 212.6
Allowance for credit losses	(8.4)	(8.2)
Total accounts receivable - net	$ 234.2	$ 204.4

Obligations under supplier finance programs - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 04, 2026	Dec. 31, 2025
Supplier Finance Program [Line Items]
Supplier finance arrangement term		180 days
Supplier finance programs	$ 181.2		$ 157.0

Share-based compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
2023 Long-Term Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, description			In October 2023, the Company adopted the Group Long-Term Incentive Plan (“2023 LTIP”) to provide a select group of managers the opportunity to participate in the Company’s value creation. Awards granted under the 2023 LTIP are subject to both performance-vesting and market-vesting conditions and provide for cash settlement upon the occurrence of certain exit events or a change in control (“Exit”).
Share-based payment arrangement, expense			$ 61.5
Share-based payment arrangement, noncash expense	$ 0.0	$ 0.0	$ 0.0	$ 0.0
2026 Incentive Award Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, description			In connection with the Company’s IPO, the Board of Directors adopted the INNIO N.V. 2026 Incentive Award Plan (the “2026 Plan”), which became effective in June 2026. The 2026 Plan provides for the grant of equity-based awards to employees, directors and other eligible service providers, including stock options, restricted share units (“RSUs”), restricted shares, share appreciation rights, performance awards and other share-based awards. The Company registered shares available for issuance under the 2026 Plan on a Form S-8 filed with the SEC on June 5, 2026.
Share-based payment arrangement, expense	1.1		$ 1.1
2026 Incentive Award Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment arrangement, nonvested award, cost not yet recognized, amount	$ 54.3		$ 54.3
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period	1,499,879
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value	$ 32.53
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period	202,221

Contract assets and contract liabilities (Tables)

6 Months Ended

Jun. 30, 2026

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]

Schedule of contract assets and contract liabilities

Contract balances were as follows:


(in millions of $)	June 30, 2026		December 31, 2025
Current		68.1		58.8
Non-current		—		—

Total Contract assets		68.1		58.8
Current		970.1		546.2
Non-current		426.8		269.9

Total Contract liabilities		1,396.9		816.1

Leases

6 Months Ended

Jun. 30, 2026

Leases [Abstract]

Leases

Note 6. Leases

The Company leases offices, manufacturing facilities, vehicles, and other equipment.

Operating lease ROU assets are included in other

non-current

assets in the consolidated statements of financial position. The current portion of operating lease liabilities is included in Other current liabilities, and the long-term portion is included in Other

non-current

liabilities in the consolidated statements of financial position. Operating lease expense is included within Cost of equipment and products sold, Cost of services sold and selling, general and administrative expenses within the consolidated statements of operations.


(in millions of $)	June 30, 2026		December 31, 2025
Current portion of operating lease liability		21.0		18.4
Non-current portion of operating lease liability		60.3		50.9

Total operating lease liability		81.3		69.3

Finance lease ROU assets are included within Property, plant and equipment—net in the consolidated statement of financial position. The current portion of finance lease liabilities is included in Other current liabilities, and the long-term portion is included in Other

non-current

liabilities in the consolidated statements of financial position.


(in millions of $)	June 30, 2026		December 31, 2025
Current portion of finance lease liability		8.5		2.7
Non-current portion of finance lease liability		18.0		15.1

Total finance lease liability		26.5		17.8

The break out of the Company’s lease expenses are as follows:


	Three Months Ended June 30,
(in millions of $)	2026		2025
Operating lease expense		7.1		5.1
Short term lease expense		0.6		0.1
Finance leases—amortization		1.0		0.3
Finance leases—interest		0.3		0.2

Total lease expense		9.0		5.7


	Six Months Ended June 30,
(in millions of $)	2026		2025
Operating lease expense		13.5		9.5
Short term lease expense		0.7		0.2
Finance leases—amortization		1.8		0.6
Finance leases—interest		0.6		0.3

Total lease expense		16.6		10.6

variable lease expense was incurred for the three and six months ended June 30, 2026 and 2025.

Contract assets and contract liabilities

6 Months Ended

Jun. 30, 2026

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]

Contract assets and contract liabilities

Note 17. Contract assets and contract liabilities

Contract balances were as follows:


(in millions of $)	June 30, 2026		December 31, 2025
Current		68.1		58.8
Non-current		—		—

Total Contract assets		68.1		58.8
Current		970.1		546.2
Non-current		426.8		269.9

Total Contract liabilities		1,396.9		816.1

Contract assets increased $9.3 million

during

the six months ended June 30, 2026, primarily due to revenue recognized for satisfied performance obligations in advance of billing milestones.

Contract liabilities increased $580.8 million

ring

the six months ended June 30, 2026, primarily due to new collections received, offset by revenue recognized as performance obligations were satisfied. Revenue recognized that was included in the contract liability balance at the beginning of the year was $300.1 million and $213.4

million for the six months ended June 30, 2026 and 2025, respectively. Information about the Company’s performance obligations and the timing of their satisfaction is provided in Note 2 – Revenue from contracts with customers.

Earnings (loss) per share

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Earnings (loss) per share

Note 22. Earnings (loss) per share

In connection with the Company’s initial public offering (“IPO”) in June 202

6, INNIO Holding GmbH was converted from a German limited liability company (Gesellschaft mit beschränkter Haftung), into INNIO Group Holding B.V., a Dutch private company with limited liability (besloten vennootschap met beperkte aansprakelijkheid). On June 4, 2026, the nominal value of the then 25,000 outstanding common shares in INNIO Group Holding B.V. was reduced to EUR 0.04, and 749,975,000 new common shares were issued to our Principal Shareholder. Thereafter, without interruption of its existence as legal entity, INNIO Group Holding B.V. was converted into a public company under Dutch law (naamloze vennootschap), and our legal name was changed to INNIO N.V. These transactions are collectively referred to as “the Conversion.”

In accordance with ASC 260-10-55-12 and SAB Topic 4.C (codified in ASC 505-10-S99-4), the Company has retroactively reflected the effect of the change in its capital structure in the consolidated financial statements for all periods presented.

Accordingly, $34,890,900 was reclassified from additional paid-in capital to common stock to reflect the change in nominal value and new shares issued upon Conversion, and earnings per share was adjusted as shown below and on the Consolidated Statements of Operations.

Basic earnings (loss) per ordinary share is computed by dividing net income (loss) attributable to our ordinary shareholders by the weighted-average number of ordinary shares outstanding during the period. Diluted earnings per ordinary share is computed by adjusting the denominator of basic earnings per share for the dilutive effect of potential ordinary shares. For RSU awards, the treasury stock method is used for determining dilution.

Under the treasury stock method, we assume that proceeds equal to the unrecognized compensation cost on each RSU award would be used to repurchase ordinary shares at the average market price for the period. The resulting incremental ordinary shares are included in the denominator for diluted earnings per share only if the effect is dilutive.

In any period in which we report a net loss, all potential ordinary shares are excluded from the computation of diluted loss per share because their effect would be anti-dilutive; diluted loss per share equals basic loss per share in such periods.

There were no dilutive securities in calculating diluted earnings per share for all the periods presented, therefore, basic and diluted earnings per share are the same.

The following securities are excluded from the calculation of weighted average diluted common shares for the three and six months ended June 30, 2026, respectively, because their inclusion would have been anti-dilutive. There were no dilutive securities issued in 2025 and earlier years.


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
RSUs		1,702,100		—		1,702,100		—

Total		1,702,100		—		1,702,100		—

The following table sets forth the calculation of basic and diluted earnings (loss) per share for the periods presented:


	Three Months Ended June 30,						Six Months Ended June 30,
(in millions of $, except share and per share amounts)	2026			2025			2026			2025
Numerator:
Net income (loss)		(16.9	)		62.4			(25.9	)		97.4
Net loss attributable to noncontrolling interests		(1.6	)		(0.1	)		(3.4	)		(0.1	)
Net income (loss) attributable to INNIO N.V. shareholders		(15.3	)		62.5			(22.5	)		97.5
Weighted-average shares outstanding:
Basic		750,000,000			750,000,000			750,000,000			750,000,000
Effect of potentially dilutive RSUs		—			—			—			—

Diluted		750,000,000			750,000,000			750,000,000			750,000,000
Net earnings (loss) per share:
Basic		(0.02	)		0.08			(0.03	)		0.13
Diluted		(0.02	)		0.08			(0.03	)		0.13

Derivative instruments and hedge accounting (Tables)

6 Months Ended

Jun. 30, 2026

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Derivative Instruments


	June 30, 2026
(in millions of $)	Notional amount		Derivative assets				Derivative liabilities
(in millions of $)	Notional amount		Other current assets		Other non- current asset		Other current liabilities			Other non- current liabilities
Interest rate swaps (Euribor)		877.3		—		4.2		—			—
Interest rate swaps (SOFR)		945.0		—		9.1		—			—

Total—Interest rate		1,822.3		—		13.3		—			—
Foreign currency hedges		1,809.6		—		—		(25.6	)		(11.5	)

Total—Foreign currency hedges		1,809.6		—		—		(25.6	)		(11.5	)

Total		3,631.9		—		13.3		(25.6	)		(11.5	)


	December 31, 2025
(in millions of $)	Notional amount		Derivative assets				Derivative liabilities
(in millions of $)	Notional amount		Other current assets		Other non- current asset		Other current liabilities			Other non- current liabilities
Interest rate swaps (Euribor)		904.8		—		0.1		—			(2.5	)
Interest rate swaps (SOFR)		945.0		—		—		—			(4.8	)

Total—Interest rate		1,849.8		—		0.1		—			(7.3	)
Foreign currency hedges		926.7		3.7		—		(0.3	)		(0.3	)

Total—Foreign currency hedges		926.7		3.7		—		(0.3	)		(0.3	)

Total		2,776.5		3.7		0.1		(0.3	)		(7.6	)

Summary of Accumulated Other Comprehensive Income Loss For The Interest Rate Hedge Accounting

Amounts deferred in Accumulated other comprehensive income (loss) for the interest rate hedge accounting were reclassified to the consolidated statement of operations as follows:


(in millions of $)	June 30, 2026			June 30, 2025
Gains (losses) recognized in OCI		22.8			(9.7	)
Reclassified to interest expense		(1.9	)		0.0

Summary of Amounts Recognized In Statement Of Operation For The Foreign Currency Hedge Accounting

The following table represents the amounts recognized in the statement of operation for the foreign currency hedge accounting, started in August, 2025:


(in millions of $)	June 30, 2026			June 30, 2025
Gains (losses) recognized in OCI		(32.8	)		—
Recycled to revenue		(0.8	)		—
Changes in spot-forward differential		11.3			—

Summary of Derivative Instruments Netting Agreements

Derivative instruments subject to master netting agreements are presented in the following table:


	June 30, 2026
(in millions of $)	Gross Amounts of Recognized Assets/ Liabilities			Gross Amounts Offset in the Statements of Financial Position		Net Amounts of Assets/ Liabilities Presented in the Statements of Financial Position			Gross Amounts Not Offset in the Statements of Financial Position				Net Amount
(in millions of $)	Gross Amounts of Recognized Assets/ Liabilities								Financial Instruments		Cash Collateral Received		Net Amount
Derivative assets		13.3			—		13.3			—		—		13.3
From which interest hedges		13.3			—		13.3			—		—		13.3
From which FX hedges		—			—		—			—		—		—
Derivative liabilities		(37.1	)		—		(37.1	)		—		—		(37.1	)
From which interest hedges		—			—		—			—		—		—
From which FX hedges		(37.1	)		—		(37.1	)		—		—		(37.1	)


	December 31, 2025
(in millions of $)	Gross Amounts of Recognized Assets/ Liabilities			Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Assets/ Liabilities Presented in the Statements of Financial Position			Gross Amounts Not Offset in the Statements of Financial Position					Net Amount
(in millions of $)	Gross Amounts of Recognized Assets/ Liabilities			Gross Amounts Offset in the Statement of Financial Position					Financial Instruments			Cash Collateral Received		Net Amount
Derivative assets		3.8			—		3.8			(0.2	)		—		3.6
From which interest hedges		0.1			—		0.1			—			—		0.1
From which FX hedges		3.7			—		3.7			(0.2	)		—		3.5
Derivative liabilities		(7.9	)		—		(7.9	)		0.2			—		(7.7	)
From which interest hedges		(7.3	)		—		(7.3	)		—			—		(7.3	)
From which FX hedges		(0.6	)		—		(0.6	)		0.2			—		(0.4	)

Operations and summary of significant accounting policies (Policies)

6 Months Ended

Jun. 30, 2026

Accounting Policies [Abstract]

Organization

gas-fueled

The Equipment segment designs, manufactures, and sells new engines, product-related equipment and related solutions addressing data center, power solutions, and compression business lines.

Reorganization

On June 3, 2026, INNIO Holding GmbH was converted, without interruption of its existence as legal entity, from a German limited liability company (

Gesellschaft mit beschränkter Haftung

) into INNIO Group Holding B.V., a Dutch private company with limited liability (

besloten vennootschap met beperkte aansprakelijkheid

). Following such conversion, the nominal value of the then

25,000

outstanding common shares in INNIO Group Holding B.V. was reduced to EUR

0.04

, and

749,975,000

new common shares were issued to our Principal Shareholder.

Thereafter, without interruption of its existence as legal entity, INNIO Group Holding B.V. was converted into a public company under Dutch law (

naamloze vennootschap

), and our legal name changed to INNIO N.V. Refer to Note 22 – Earnings (loss) per share for more information.

Basis of presentation

millions.

Use of Estimates

Estimates are used for, but are not limited to, determining the point in time when control transfers to the customer for revenues, contract margins and costs to complete the project when applying the

percentage-of-completion

Equity method investments

1.5 Equity method investments.

non-current

As of June 30, 2026, the Company’s equity method investments balance consists of a 24.9%

interest in Nordic (Luxembourg) S.à r.l. (“Nordic LuxCo”). The equity method investment is recognized in Other

non-current

Recently adopted accounting standards

1.6. Recently adopted accounting standards.

Financial instruments - Credit losses (ASU

2025-05,

Topic 326). In July 2025, the Financial Accounting Standards Board (“FASB”) issued ASU

2025-05,

which amends ASC

326-20

2025-05

and applied the practical expedient, which did not have a material impact on the consolidated financial statements or disclosures.

Accounting standards issued but not yet adopted

1.7. Accounting standards issued but not yet adopted.

Disaggregation of income statement expenses (ASU 2024-03, Subtopic 220-40)

. In November 2024, the FASB issued ASU

2024-03,

Derivatives and revenue recognition (ASU 2025-07, Topics 815 and 606).

In September 2025, the FASB issued ASU

2025-07,

non-exchange-traded

- Definition

Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478671/942-235-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-12

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-9

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482836/275-10-55-6

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-6

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-4

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-SubTopic 10
-Topic 275
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-SubTopic 10
-Topic 275
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-1

+ Details

Leases (Tables)

6 Months Ended

Jun. 30, 2026

Leases [Abstract]

Summary of Operating Lease Liability


(in millions of $)	June 30, 2026		December 31, 2025
Current portion of operating lease liability		21.0		18.4
Non-current portion of operating lease liability		60.3		50.9

Total operating lease liability		81.3		69.3

Summary of Finance Lease Liability


(in millions of $)	June 30, 2026		December 31, 2025
Current portion of finance lease liability		8.5		2.7
Non-current portion of finance lease liability		18.0		15.1

Total finance lease liability		26.5		17.8

Summary of Lease Cost


	Three Months Ended June 30,
(in millions of $)	2026		2025
Operating lease expense		7.1		5.1
Short term lease expense		0.6		0.1
Finance leases—amortization		1.0		0.3
Finance leases—interest		0.3		0.2

Total lease expense		9.0		5.7


	Six Months Ended June 30,
(in millions of $)	2026		2025
Operating lease expense		13.5		9.5
Short term lease expense		0.7		0.2
Finance leases—amortization		1.8		0.6
Finance leases—interest		0.6		0.3

Total lease expense		16.6		10.6

Segment reporting (Tables)

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

Summary of Sub-Unit Information by Revenue

Revenues are reported for the Equipment and Service groupings described above;

sub-unit

information is presented where it is regularly provided to the CODM.


	Three Months Ended June 30,				Six Months Ended June 30,
(in millions of $)	2026		2025		2026		2025
Equipment revenue
Data Center		232.4		118.0		339.4		170.3
Power Solutions		273.6		181.5		441.7		295.8
Compression		63.3		54.6		110.7		98.2

Total equipment revenue		569.3		354.1		891.8		564.3
Service revenue
Transactional		236.1		192.8		442.3		364.8
Contractual		132.3		112.6		272.4		224.4

Total service revenue		368.4		305.4		714.7		589.2

Total revenue		937.7		659.5		1,606.5		1,153.5

Schedule of Segment Reporting Financial Information

Selected financial information for each segment is as follows:


	Three Months Ended June 30, 2026
(in millions of $)	Equipment			Service			Total from Reportable Segments
Total revenue		569.3			368.4			937.7
Less: Significant segment expenses regularly provided to the CODM (a)
Cost of goods and services sold		(421.6	)		(208.2	)		(629.8	)
Research and development		(20.6	)		(11.3	)		(31.9	)
Selling, general and administrative expenses		(65.0	)		(53.6	)		(118.6	)
Depreciation and amortization		14.4			12.7			27.1
Other non-cash items (b)		1.2			0.8			2.0
Management adjustments (c)		0.4			0.9			1.3
Other segment items (d)		0.5			0.1			0.6

Adjusted Segment EBITDA (e)		78.6			109.8			188.4


	Three Months Ended June 30, 2025
(in millions of $)	Equipment			Service			Total from Reportable Segments
Total revenue		354.1			305.4			659.5
Less: Significant segment expenses regularly provided to the CODM (a)
Cost of goods and services sold		(251.0	)		(180.1	)		(431.1	)
Research and development		(13.9	)		(13.3	)		(27.2	)
Selling, general and administrative expenses		(35.9	)		(40.6	)		(76.5	)
Depreciation and amortization		11.3			13.3			24.6
Other non-cash items (b)		1.2			0.9			2.1
Management adjustments (c)		0.1			0.5			0.6
Other segment items (d)		0.2			(0.2	)		—

Adjusted Segment EBITDA (e)		66.1			85.9			152.0


	Six Months Ended June 30, 2026
(in millions of $)	Equipment			Service			Total from Reportable Segments
Total revenue		891.8			714.7			1,606.5
Less: Significant segment expenses regularly provided to the CODM (a)
Cost of goods and services sold		(662.5	)		(402.3	)		(1,064.8	)
Research and development		(39.3	)		(21.5	)		(60.8	)
Selling, general and administrative expenses		(120.5	)		(100.3	)		(220.8	)
Depreciation and amortization		27.1			25.2			52.3
Other non-cash items (b)		3.3			2.2			5.5
Management adjustments (c)		0.6			1.5			2.1
Other segment items (d)		1.0			0.3			1.3

Adjusted Segment EBITDA (e)		101.5			219.8			321.3


	Six Months Ended June 30, 2025
(in millions of $)	Equipment			Service			Total from Reportable Segments
Total revenue		564.3			589.2			1,153.5
Less: Significant segment expenses regularly provided to the CODM (a)
Cost of goods and services sold		(397.5	)		(338.2	)		(735.7	)
Research and development		(23.8	)		(22.6	)		(46.4	)
Selling, general and administrative expenses		(73.3	)		(80.9	)		(154.2	)
Depreciation and amortization		21.9			26.1			48.0
Other non-cash items (b)		2.1			1.6			3.7
Management adjustments (c)		0.1			0.9			1.0
Other segment items (d)		0.5			0.1			0.6

Adjusted Segment EBITDA (e)		94.3			176.2			270.5

Note

(a)

Significant segment expenses represent categories that are regularly provided to and used by the CODM to assess performance and allocate resources. These include Cost of equipment and products sold, Cost of services sold, Selling, general and administrative expenses, Research and development expenses, and Other segment items that are not individually significant.

(b)	Other non-cash items include amortization expenses of capitalized costs to obtain contracts.

(c)	Management adjustments are described below in the reconciliation of Adjusted Segment EBITDA to Net income.

(d)

Other segment items represent the residual components of the CODM measure of segment profit that are not otherwise separately disclosed as revenue or significant expense categories. It primarily includes Other operating (income) expense—net and other

non-significant

cost categories (including certain shared or allocated costs included in segment results) that are reviewed by the CODM in aggregate (e.g., foreign currency transaction gains and losses, gains and losses on asset disposals, and miscellaneous operating items).

(e)	Adjusted Segment EBITDA is the CODM’s segment profit measure. Corporate/unallocated costs (“HQ”) are not included in Adjusted Segment EBITDA and are presented in the reconciliation to consolidated Net income.

Summary of Reconciliation of Adjusted Segment EBITDA to Net income

Adjusted Segment EBITDA is reconciled to Net income by presenting unallocated corporate costs not included in segment results, management adjustments, other

non-cash

items, depreciation and amortization, Interest and other financial charges—net,

non-operating

income (expense) and Income tax expense.


	Three Months Ended June 30,						Six Months Ended June 30,
(in millions of $)	2026			2025			2026			2025
Total Adjusted Segment EBITDA		188.4			152.0			321.3			270.5
Unallocated corporate costs (HQ & other not included in Adjusted Segment EBITDA)		(16.1	)		(7.9	)		(26.5	)		(12.4	)
Acquisition and Divestment related gains (losses) - net		(0.5	)		(0.7	)		(0.7	)		(0.4	)
Transaction costs		(0.5	)		—			(4.6	)		—
Transformation costs		(1.8	)		(3.1	)		(5.3	)		(5.7	)
IPO and Public market readiness costs		(81.2	)		(0.1	)		(91.1	)		(0.1	)
Share-based compensation		(1.1	)		—			(1.1	)		—

Management adjustments		(85.1	)		(3.9	)		(102.8	)		(6.2	)
Other non-cash items		(2.0	)		(2.1	)		(5.5	)		(3.7	)
Depreciation and amortization		(40.1	)		(37.0	)		(78.3	)		(72.1	)
Other income (expense) - net		3.7			0.9			6.9			1.5
Interest expense and related financing costs - net		(52.9	)		(21.5	)		(123.7	)		(50.1	)
Income tax expense		(12.8	)		(18.1	)		(17.3	)		(30.1	)

Net income (loss)		(16.9	)		62.4			(25.9	)		97.4

Summary of Long-lived Assets Attributable to Geographic Areas

•

IPO and Public market readiness costs that the Company incurs to implement financial statements in US GAAP, including: implementing SOX-compliant internal controls, improving processes and organization required for public US markets, bonuses linked to successful public offering including long-term incentive plans, and legal and advisory fees related to INNIO’s IPO. During the six months ended June 30, 2026, the Company incurred the following costs:


• Long-term incentive program 2023		$61.5 million
• Costs related to financial statements in US GAAP		$20.8 million
• Advisory fees		$4.1 million
• Others		$3.7 million
• Legal fees		$1.0 million

- Definition

Tabular disclosure of segment reporting. Includes, but is not limited to, reconciliation of reportable segment amount to corresponding consolidated total.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-15

+ Details

Related party transactions - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Mar. 30, 2026	Dec. 31, 2025
Related Party Transaction [Line Items]
Equity method investments	$ 6.6		$ 6.6			$ 0.0
Revenue from contract with customer, excluding assessed tax	937.7	$ 659.5	1,606.5	$ 1,153.5
Accounts receivable, after allowance for credit loss, current	234.2		234.2			$ 204.4
Nordic LuxCo [Member]
Related Party Transaction [Line Items]
Equity method investment, ownership percentage					24.90%
Equity method investments					$ 7.3
Revenue from contract with customer, excluding assessed tax	1.3		2.7
Accounts receivable, after allowance for credit loss, current	$ 0.9		$ 0.9

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References + Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

+ Details

Revenue from contracts with customers (Tables)

6 Months Ended

Jun. 30, 2026

Revenue from Contract with Customer [Abstract]

Summary of Company's sales are disaggregated by geographic market

Disaggregation of sales

. The Company’s sales are disaggregated by geographic market and by type as follows for the three months ended June 30, 2026 and 2025:


	Three Months Ended June 30, 2026
(in millions of $)	Equipment		Service		Total
Germany		27.9		54.3		82.2
Total Europe		143.7		172.2		315.9
United States		320.3		83.6		403.9
Total North America		334.5		105.0		439.5
Rest of World		91.1		91.2		182.3

Total		569.3		368.4		937.7


	Three Months Ended June 30, 2025
(in millions of $)	Equipment		Service		Total
Germany		25.0		50.0		75.0
Total Europe		109.4		153.6		263.0
United States		150.5		50.1		200.6
Total North America		151.3		69.7		221.0
Rest of World		93.4		82.1		175.5

Total		354.1		305.4		659.5

The Company’s sales are disaggregated by geographic market and by type as follows for the six months ended June 30, 2026 and 2025:


	Six Months Ended June 30, 2026
(in millions of $)	Equipment		Service		Total
Germany		46.7		107.7		154.4
Total Europe		231.9		347.2		579.1
United States		500.7		143.5		644.2
Total North America		520.6		184.7		705.3
Rest of World		139.3		182.8		322.1

Total		891.8		714.7		1,606.5


	Six Months Ended June 30, 2025
(in millions of $)	Equipment		Service		Total
Germany		47.3		100.6		147.9
Total Europe		152.8		300.1		452.9
United State s		243.3		100.9		344.2
Total North America		252.3		136.7		389.0
Rest of World		159.2		152.4		311.6

Total		564.3		589.2		1,153.5

Warranty provisions - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2024
Product Warranty Liability [Line Items]
Warranty provisions	$ 59.4	$ 60.8	$ 60.1	$ 55.1
Minimum [Member]
Product Warranty Liability [Line Items]
Warranty coverage range	12 months
Maximum [Member]
Product Warranty Liability [Line Items]
Warranty coverage range	36 months

Revenue from contracts with customers

6 Months Ended

Jun. 30, 2026

Revenue from Contract with Customer [Abstract]

Revenue from contracts with customers

Note 2. Revenue from contracts with customers

Disaggregation of sales

. The Company’s sales are disaggregated by geographic market and by type as follows for the three months ended June 30, 2026 and 2025:


	Three Months Ended June 30, 2026
(in millions of $)	Equipment		Service		Total
Germany		27.9		54.3		82.2
Total Europe		143.7		172.2		315.9
United States		320.3		83.6		403.9
Total North America		334.5		105.0		439.5
Rest of World		91.1		91.2		182.3

Total		569.3		368.4		937.7


	Three Months Ended June 30, 2025
(in millions of $)	Equipment		Service		Total
Germany		25.0		50.0		75.0
Total Europe		109.4		153.6		263.0
United States		150.5		50.1		200.6
Total North America		151.3		69.7		221.0
Rest of World		93.4		82.1		175.5

Total		354.1		305.4		659.5

The Company’s sales are disaggregated by geographic market and by type as follows for the six months ended June 30, 2026 and 2025:


	Six Months Ended June 30, 2026
(in millions of $)	Equipment		Service		Total
Germany		46.7		107.7		154.4
Total Europe		231.9		347.2		579.1
United States		500.7		143.5		644.2
Total North America		520.6		184.7		705.3
Rest of World		139.3		182.8		322.1

Total		891.8		714.7		1,606.5


	Six Months Ended June 30, 2025
(in millions of $)	Equipment		Service		Total
Germany		47.3		100.6		147.9
Total Europe		152.8		300.1		452.9
United State s		243.3		100.9		344.2
Total North America		252.3		136.7		389.0
Rest of World		159.2		152.4		311.6

Total		564.3		589.2		1,153.5

Revenues from customers are attributed to geographic areas based on the end customer’s location when known at the time of revenue recognition. In case of stock orders by distributors or packagers where the end customer location is not known at the time of the sale, the ship to location is used. Information is aggregated as Europe, North America and Rest of World.

Remaining Performance Obligations

As of June 30, 2026, the Company entered into contracts with customers for which revenue has not been recognized as the performance obligations have not yet been satisfied. The amount of unsatisfied performance obligations is $8.8 billion, with approximately 79% of the amount expected to be recognized in the 24 months following June 30, 2026. The Company expects to recognize this revenue as the remaining performance obligations are satisfied.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-15

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

+ Details

Fair value disclosures

6 Months Ended

Jun. 30, 2026

Fair Value Disclosures [Abstract]

Fair value disclosures

Not

24. Fair value disclosures

The Company’s only financial assets and liabilities measured at fair value on a recurring basis are derivative instruments and contingent consideration.

In accordance with ASC 820, the Company groups the fair values of its financial assets and liabilities in three levels based on the inputs used to determine fair value. No transfers between levels occurred in the six months ended June 30, 2026 and 2025.

The following tables include (i) financial assets and liabilities measured at fair value on a recurring basis and (ii) financial instruments measured at amortized costs for which fair value disclosures are required under ASC 820:


	June 30, 2026
(in millions of $)	Carrying amount		Fair value		Fair value hierarchy level
(in millions of $)	Carrying amount		Fair value		Fair value hierarchy level
Assets
Derivative instruments		13.3		13.3		2
Liabilities
Debt		2,618.7		2,532.0		2
Contingent consideration		1.0		1.0		3
Derivative instruments		37.1		37.1		2


	December 31, 2025
(in millions of $)	Carrying amount		Fair value		Fair value hierarchy level
(in millions of $)	Carrying amount		Fair value		Fair value hierarchy level
Assets
Derivative instruments		3.8		3.8		2
Liabilities
Debt		2,658.8		2,699.7		2
Contingent consideration		2.7		2.7		3
Derivative instruments		7.9		7.9		2

Fair value measurements are classified within a three-level hierarchy based on the observability of inputs used in valuation techniques, as follows:

•

Level 1: Quoted prices in active markets for identic

l assets or liabilities.

•

Level 2: Observable inputs other than quoted prices included within Level 1 that are directly or indirectly observable.

•

Level 3: Unobservable inputs.

The fair values of contingent consideration as of the reporting dates reconcile as follows:


	Contingent consideration
(in millions of $)	2026			2025
Balance as of January 1		2.7			1.4
Additions		—			—
Adjustments/Payments		(1.7	)		0.9
Remeasurement effects		0.0			0.0

Balance as of June 30		1.0			2.3

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Topic 820
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Section 50
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

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-Topic 820
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-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

Long-term debt - current and non-current (Tables)

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

Summary of company's current and non-current portions of long-term debt

The Company’s current and

non-current

portions of long-term debt are comprised of the following:


(in millions of $)	June 30, 2026		December 31, 2025
Long-term debt—net		2,607.1		2,647.4
Current portion of Long-term debt—net		11.6		11.4

Total		2,618.7		2,658.8

Summary of available facilities

Available facilities as of June 30, 2026 are:

Facility drawn

Nominal
Amount (a)

Currency

Rate /Margin (b)

Maturity

Term Loan B—EUR

1,100.0

EUR

Euribor + 2.00% (0% floor)

11/2/2031

Term Loan B—USD

1,339.5

USD

SOFR + 1.75% (0% floor)

11/2/2031

Term Facility—CAD

49.0

CAD

CORRA + 1.36%

9/25/2030

Facility undrawn

Revolving Credit Facility (RCF)

210.0

EUR

SOFR/Euribor + 2.00%

5/2/2031

Ancillary Facility – ERSTE Bank (c)

40.0

EUR

SOFR/Euribor + 2.50%

7/31/2027

Ancillary Facility – HELABA

50.0

EUR

SOFR/Euribor + 2.00%

5/2/2031

(a)	Nominal amounts without principal amortization payments.

(b)	The table includes the conditions as of 30.06.2026 and loans bear variable interest rates based on Secured Overnight Finance Rate (“SOFR”), Euro Interbank Offered Rate (“EURIBOR”) or Canadian Overnight Repo Rate Average (‘‘CORRA’’) plus applicable margins depending on the leverage ratios.

(c)	$ 36.5 million of the ERSTE Bank ancillary facility line was temporarily allocated to the supplier finance program as of June 30, 2026.

Summary of undiscounted future cash outflows of the Company's long-term debt

The following table summarizes the undiscounted future cash outflows of the Company’s long-term debt including interest:


(in millions of $)	2026		2027		2028		2029		2030		Thereafter		Total
Principal		7.6		15.8		14.6		15.1		44.7		2,530.1		2,627.9
Interest		64.8		127.9		127.4		126.3		125.2		103.6		675.2

Total		72.4		143.7		142.0		141.4		169.9		2,633.7		3,303.1

Summary of assets pledged as collateral in connection with the Company's borrowing

The total assets pledged as collateral in connection with the Company’s borrowing arrangements were:


(in millions of $)	June 30, 2026		December 31, 2025
Cash and cash equivalents		697.4		430.4
Accounts receivable—net		106.9		78.4
Inventories		429.4		221.4
Other current assets		25.5		8.4
Property, plant, and equipment—net		118.3		106.3
Intangible assets—net		26.7		27.8
Other non-current assets		12.7		10.0

Total		1,416.9		882.7

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

Accounts receivable - net (Tables)

6 Months Ended

Jun. 30, 2026

Receivables [Abstract]

Summary of accounts receivable - net

Accounts receivable - net is comprised of the following:


(in millions of $)	June 30, 2026			December 31, 2025
Customer receivables		242.6			212.6
Allowance for credit losses		(8.4	)		(8.2	)

Total accounts receivable - net		234.2			204.4

Schedule of Roll-Forward of Credit Loss Allowances Recognized for Accounts Receivable Not Yet Sold

The following table provides the roll-forward of the credit loss allowances recognized for the accounts receivable not yet sold:


(in millions of $)	2026			2025
Balance as of January 1		(8.2	)		(7.8	)
Changes to the current provision		(0.8	)		(2.4	)
Write-offs, net		0.5			0.3
Foreign currency effect		0.1			(0.4	)

Balance as of June 30		(8.4	)		(10.3	)

Commitments and guarantees	6 Months Ended
Commitments and guarantees	Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and guarantees	Note 21. Commitments and guarantees Commitments As of June 30, 2026, the Company had contractual commitments to acquire Intangible assets tot aling $32.1 million and Property, plant and equipment totaling $259.9 million. Guarantees The Company has provided advance payment and performance guarantees issued in favor of customers in connection with customer contracts. As of June 30, 2026, the Company determined it was not probable it would provide additional compensation under the guarantees. The maximum potential amount of future payments (undiscounted and without reduction for any amounts possibly recoverable) that the Company could be required to make under the guarantees w a s $185.4 million as of June 30, 2026. Customer guarantees are secured by the guarantee facility issued under the Senior Facilities Agreement discussed in Note 7 – Long-term debt - current and non-current.

Accounts receivable - net - Schedule of Roll-Forward of Credit Loss Allowances Recognized for Accounts Receivable Not Yet Sold (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Credit Loss [Abstract]
Balance as of January 1			$ 8.2	$ 7.8
Changes to the current provision			(0.8)	(2.4)
Write-offs, net	$ 0.4	$ 0.2	0.5	0.3
Foreign currency effect			0.1	(0.4)
Balance as of June 30	$ 8.4	$ 10.3	$ 8.4	$ 10.3

Goodwill and intangible assets - Summary of Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,550.1	$ 1,585.5
Accum. Amort.	(830.4)	(808.2)
Net	719.7	777.3
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	886.9	912.4
Accum. Amort.	(485.8)	(473.4)
Net	401.1	439.0
Capitalized Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	460.4	465.3
Accum. Amort.	(344.0)	(334.2)
Net	116.4	131.1
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	202.0	207.0
Accum. Amort.	0.0	0.0
Net	202.0	207.0
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	0.8	0.8
Accum. Amort.	(0.6)	(0.6)
Net	$ 0.2	$ 0.2

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

Leases - Summary of Operating Lease Liability (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Operating Lease, Liability [Abstract]
Current portion of operating lease liability	$ 21.0	$ 18.4
Non-current portion of operating lease liability	60.3	50.9
Total operating lease liability	$ 81.3	$ 69.3

Income taxes	6 Months Ended
Income taxes	Jun. 30, 2026
Income Tax Disclosure [Abstract]
Income taxes	Note 16. Income taxes Our income tax expense for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter we update our estimate of the annual effective tax rate, and if our annual effective tax rate changes, we make a cumulative adjustment. Significant judgment is required in estimating our annual effective tax rate and in evaluating our tax positions. The effective tax rate for the six months ended June 30, 2026 was (201.2) %, compared to 23.6 % for the six months ended June 30, 2025. The effective tax rate for the three months ended June 3 0 , 2026 was (312.2) %, compared to 22.5 % for the three months ended June 3 0 , 2025. The effective tax rate decreased for the three months ended June 30, 2026 and the six months ended June 30, 2026 compared to the three months ended June 30, 2025 and the six months ended June 30, 2025. The decrease of the annual effective tax rate was primarily due to losses and expenses providing no income tax benefit in certain jurisdictions. For the six months ended June 30, 2026 these losses and expenses have been driven by IPO and Public market readiness costs as well as non-deductible expenses for interests. Furthermore, an increase in the estimate for U.S. federal Foreign-Derived Deduction-Eligible Income tax deduction relative to its predecessor regime also decreased the annual effective tax rate for 2026.

- Definition

The entire disclosure for income tax.

+ References

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+ Details

Contract assets and contract liabilities - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Contract assets	$ 9.3
Contract liabilities	580.8
Contract with customer, liability, revenue recognized	$ 300.1	$ 213.4

Property, plant and equipment-net (Tables)

6 Months Ended

Jun. 30, 2026

Property, Plant and Equipment [Abstract]

Property, plant and equipment-net

Property, plant and equipment—net is comprised of the following:


(in millions of $)	June 30, 2026			December 31, 2025
Property, plant, and equipment—original cost		965.1			881.2
Accumulated depreciation		(366.0	)		(340.8	)

Total Property, plant, and equipment—net		599.1			540.4

Property, plant and equipment-net - Summary of Property, plant and equipment-net (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Property, Plant and Equipment [Abstract]
Property, plant, and equipment—original cost	$ 965.1	$ 881.2
Accumulated depreciation	(366.0)	(340.8)
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization, Total	$ 599.1	$ 540.4

- Definition

Amount of accumulated depreciation, depletion, and amortization of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

+ References + Details

- Definition

Amount, after accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 360
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478443/942-360-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 360
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478451/942-360-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(8))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Other liabilities (Tables)

6 Months Ended

Jun. 30, 2026

Other Liabilities Disclosure [Abstract]

Other Liabilities

Other liabilities are comprised of the following:


(in millions of $)	June 30, 2026		December 31, 2025
Consideration payable		51.3		50.4
Non-income based tax liabilities		19.7		17.4
Provisions		24.3		23.3
Current portion of operating lease liability		21.0		18.4
Income tax liabilities		11.9		15.0
Current portion of long term debt—net		11.6		11.4
Derivative instruments		25.6		0.3
Other		29.1		17.5

Other current liabilities		194.5		153.7
Non-current portion of operating lease liability		60.3		50.9
Employee benefits		44.3		47.5
Provisions		36.7		40.1
Derivative instruments		11.5		7.6
Other		23.0		20.6

Other non-current liabilities		175.8		166.7

Warranty provisions

6 Months Ended

Jun. 30, 2026

Product Warranties Disclosures [Abstract]

Warranty provisions

Note 9. Warranty provisions

The Company recognizes warranty provisions for the estimated costs of fulfilling its warranty obligations. Warranty provisions are categorized as either general or specific.

Warranty provisions are presented within the Company’s other current liabilities and other

non-current

liabilities in the consolidated statements of financial position. Warranty provisions were $59.4 million and $60.8 million as of June 30, 2026 and December 31, 2025, respectively.

Standard warranty coverage generally ranges from 12 to 36 months from delivery or commissioning, depending on the product line, and provisions reflect the estimated costs over the applicable coverage period.


(in millions of $)	2026			2025
Balance as of January 1		60.8			55.1
Current year provisions		14.0			11.1
Expenditure		(9.5	)		(8.8	)
Other changes		(5.9	)		2.7

Balance as of June 30		59.4			60.1
current		23.0			19.1
non-current		36.4			41.0

Inventories (Tables)

6 Months Ended

Jun. 30, 2026

Inventory Disclosure [Abstract]

Schedule of inventory current

Inventories are comprised of the following:


(in millions of $)	June 30, 2026		December 31, 2025
Finished goods		244.0		212.0
Raw materials and supplies		302.1		171.9
Work in process		282.3		188.5
Goods in transit		108.5		8.5
Unbilled shipments		21.2		20.3

Total inventories		958.1		601.2

Segment reporting - Summary of Initial Public Offering Offers Cost (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Segment Reporting [Abstract]
Long-term incentive program 2023	$ 61.5
Costs related to financial statements in US GAAP	20.8
Advisory fees	4.1
Others	3.7
Legal fees	$ 1.0

Operations and summary of significant accounting policies - Additional Information (Detail)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2026

USD ($)

Jun. 30, 2026

USD ($)

Jun. 30, 2026

€ / shares

Jun. 04, 2026

Jun. 03, 2026

€ / shares

Dec. 31, 2025

€ / shares

Disclosure Of Operations And Significant Accounting Policies [Line Items]

Common stock, shares, outstanding

^[1]

750,000,000

Common stock, shares, issued

^[1]

750,000,000

Income (Loss) from Equity Method Investments | $

$ 0.7

Nordic Luxembourg Sarl [Member]

Disclosure Of Operations And Significant Accounting Policies [Line Items]

Equity method investment, ownership percentage

24.90%

Common Stock [Member]

Disclosure Of Operations And Significant Accounting Policies [Line Items]

Common stock, shares, outstanding

25,000

Common Stock, Par or Stated Value Per Share | € / shares

€ 0.04

^[1]

€ 0.04

^[1]

Common stock, shares, issued

749,975,000

[1]	The nominal value, shares issued and outstanding and additional paid-in capital have been adjusted for the 2025 balance. Refer to Note 22 for more information.

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

+ Details

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

+ References + Details

Earnings (loss) per share - Summary of basic and diluted earnings (loss) per share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Numerator:
Net income (loss)	$ (16.9)	$ 62.4	$ (25.9)	$ 97.4
Net loss attributable to noncontrolling interests	(1.6)	(0.1)	(3.4)	(0.1)
Net income (loss) attributable to INNIO N.V. shareholders	$ (15.3)	$ 62.5	$ (22.5)	$ 97.5
Weighted-average shares outstanding:
Weighted average number of shares outstanding, basic	750,000,000	750,000,000	750,000,000	750,000,000
Effect of potentially dilutive RSUs	0	0	0	0
Weighted average number of shares outstanding, diluted	750,000,000	750,000,000	750,000,000	750,000,000
Net earnings (loss) per share:
Earnings per share, basic	$ (0.02)	$ 0.08	$ (0.03)	$ 0.13
Earnings per share, diluted	$ (0.02)	$ 0.08	$ (0.03)	$ 0.13

Segment reporting - Summary of Selected financial information for each segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Revenue From Segments To Consolidated [Line Items]
Total revenue	$ 937.7	$ 659.5	$ 1,606.5	$ 1,153.5
Other non-cash items			(32.0)	(11.8)
Operating Segments [Member]
Revenue From Segments To Consolidated [Line Items]
Total revenue	937.7	659.5	1,606.5	1,153.5
Cost of goods and services sold	(629.8)	(431.1)	(1,064.8)	(735.7)
Research and development	(31.9)	(27.2)	(60.8)	(46.4)
Selling, general and administrative expenses	(118.6)	(76.5)	(220.8)	(154.2)
Depreciation and amortization	27.1	24.6	52.3	48.0
Other non-cash items	2.0	2.1	5.5	3.7
Management adjustments	1.3	0.6	2.1	1.0
Other segment items	0.6	0.0	1.3	0.6
Adjusted Segment EBITDA	188.4	152.0	321.3	270.5
Equipment [Member]
Revenue From Segments To Consolidated [Line Items]
Total revenue	569.3	354.1	891.8	564.3
Equipment [Member] \| Operating Segments [Member]
Revenue From Segments To Consolidated [Line Items]
Total revenue	569.3	354.1	891.8	564.3
Cost of goods and services sold	(421.6)	(251.0)	(662.5)	(397.5)
Research and development	(20.6)	(13.9)	(39.3)	(23.8)
Selling, general and administrative expenses	(65.0)	(35.9)	(120.5)	(73.3)
Depreciation and amortization	14.4	11.3	27.1	21.9
Other non-cash items	1.2	1.2	3.3	2.1
Management adjustments	0.4	0.1	0.6	0.0
Other segment items	0.5	0.2	1.0	0.5
Adjusted Segment EBITDA	78.6	66.1	101.5	94.3
Service [Member]
Revenue From Segments To Consolidated [Line Items]
Total revenue	368.4	305.4	714.7	589.2
Service [Member] \| Operating Segments [Member]
Revenue From Segments To Consolidated [Line Items]
Total revenue	368.4	305.4	714.7	589.2
Cost of goods and services sold	(208.2)	(180.1)	(402.3)	(338.2)
Research and development	(11.3)	(13.3)	(21.5)	(22.6)
Selling, general and administrative expenses	(53.6)	(40.6)	(100.3)	(80.9)
Depreciation and amortization	12.7	13.3	25.2	26.1
Other non-cash items	0.8	0.9	2.2	1.6
Management adjustments	0.9	0.5	1.5	0.9
Other segment items	0.1	(0.2)	0.3	0.1
Adjusted Segment EBITDA	$ 109.8	$ 85.9	$ 219.8	$ 176.2

Earnings (loss) per share (Tables)

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Summary of securities are excluded from the calculation of weighted average diluted common shares


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
RSUs		1,702,100		—		1,702,100		—

Total		1,702,100		—		1,702,100		—

Summary of basic and diluted earnings (loss) per share

The following table sets forth the calculation of basic and diluted earnings (loss) per share for the periods presented:


	Three Months Ended June 30,						Six Months Ended June 30,
(in millions of $, except share and per share amounts)	2026			2025			2026			2025
Numerator:
Net income (loss)		(16.9	)		62.4			(25.9	)		97.4
Net loss attributable to noncontrolling interests		(1.6	)		(0.1	)		(3.4	)		(0.1	)
Net income (loss) attributable to INNIO N.V. shareholders		(15.3	)		62.5			(22.5	)		97.5
Weighted-average shares outstanding:
Basic		750,000,000			750,000,000			750,000,000			750,000,000
Effect of potentially dilutive RSUs		—			—			—			—

Diluted		750,000,000			750,000,000			750,000,000			750,000,000
Net earnings (loss) per share:
Basic		(0.02	)		0.08			(0.03	)		0.13
Diluted		(0.02	)		0.08			(0.03	)		0.13

Obligations under supplier finance programs	6 Months Ended
Obligations under supplier finance programs	Jun. 30, 2026
Payables and Accruals [Abstract]
Obligations under supplier finance programs	Note 8. Obligations under supplier finance programs The Company maintains supplier finance arrangements (also referred to as “reverse factoring”) with certain financial institutions to facilitate early payment to participating suppliers. The Company’s payment terms with these suppliers, which are considered to be commercially reasonable, generally extend up to 180 days. INNIO N.V. and other subsidiaries provide a guarantee in connection with these supplier finance arrangements. No additional assets are pledged as collateral. The settlement terms for trade payables subject to these programs are consistent with the Company’s standard payment terms. As of June 30, 2026 and December 31, 2025, outstanding obligations under supplier finance programs were $181.2 million and $157.0 million, respectively.

Other assets - Summary of other assets (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Schedule Of Other Assets [Line Items]
Governmental grants	$ 28.3	$ 34.4
Contract assets	68.1	58.8
Non-income based tax receivables	53.4	36.8
Income tax receivables	29.8	25.2
Other	28.3	25.6
Other current assets	207.9	180.8
Operating lease right-of-use assets	80.3	68.4
Contract acquisition costs	15.6	15.3
Deferred tax assets	16.6	15.1
Equity method investments	6.6	0.0
Other	8.7	5.5
Other non-current assets	141.1	104.4
Derivative Financial Instruments, Assets [Member]
Schedule Of Other Assets [Line Items]
Derivative instruments	$ 13.3	$ 0.1

Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2026	Jul. 27, 2026
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2026
Document Fiscal Year Focus	2026
Document Transition Report	false
Entity File Number	001-43329
Entity Registrant Name	INNIO N.V.
Entity Incorporation, State or Country Code	P7
Entity Central Index Key	0002109150
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	Nymphenburger Strasse 5
Entity Address, City or Town	Munich
Entity Address, Country	DE
Entity Address, Postal Zip Code	80335
City Area Code	+49
Local Phone Number	89.2500381-0
Entity Current Reporting Status	No
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common shares, nominal value €0.04 per share
Trading Symbol	INIO
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		750,000,000
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Other Address [Member]
Document Information [Line Items]
Entity Address, Address Line One	1101 W. St. Paul Ave.
Entity Address, City or Town	Waukesha
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	53188
City Area Code	+1
Local Phone Number	262.547.3311

Commitments and guarantees - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Senior Facilities Agreement [Member]
Long-Term Purchase Commitment [Line Items]
Guarantor obligations, maximum exposure, undiscounted	$ 185.4
Intangible Assets [Member]
Long-Term Purchase Commitment [Line Items]
Long-term purchase commitment, amount	32.1
Property, Plant and Equipment [Member]
Long-Term Purchase Commitment [Line Items]
Long-term purchase commitment, amount	$ 259.9

Accrued liabilities (Tables)

6 Months Ended

Jun. 30, 2026

Accrued Liabilities [Abstract]

Summary of Accrued liabilities

Accrued liabilities are comprised of the following:


(in millions of $)	June 30, 2026		December 31, 2025
Personnel accruals		134.0		89.0
Accrual for outstanding invoices		54.6		48.4
Accrued interest		19.1		30.5
Accrued freight expenses		13.3		9.3
Accruals for professional fees		9.3		4.8
Other accruals		5.1		4.1

Accrued l iabilities		235.4		186.1

Derivative instruments and hedge accounting

6 Months Ended

Jun. 30, 2026

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative instruments and hedge accounting

Note 11. Derivative instruments and hedge accounting

The Company uses derivative financial instruments, primarily interest rate swap contracts and foreign currency forward contracts to manage its exposure to interest rate and exchange rate risks.


	June 30, 2026
(in millions of $)	Notional amount		Derivative assets				Derivative liabilities
(in millions of $)	Notional amount		Other current assets		Other non- current asset		Other current liabilities			Other non- current liabilities
Interest rate swaps (Euribor)		877.3		—		4.2		—			—
Interest rate swaps (SOFR)		945.0		—		9.1		—			—

Total—Interest rate		1,822.3		—		13.3		—			—
Foreign currency hedges		1,809.6		—		—		(25.6	)		(11.5	)

Total—Foreign currency hedges		1,809.6		—		—		(25.6	)		(11.5	)

Total		3,631.9		—		13.3		(25.6	)		(11.5	)


	December 31, 2025
(in millions of $)	Notional amount		Derivative assets				Derivative liabilities
(in millions of $)	Notional amount		Other current assets		Other non- current asset		Other current liabilities			Other non- current liabilities
Interest rate swaps (Euribor)		904.8		—		0.1		—			(2.5	)
Interest rate swaps (SOFR)		945.0		—		—		—			(4.8	)

Total—Interest rate		1,849.8		—		0.1		—			(7.3	)
Foreign currency hedges		926.7		3.7		—		(0.3	)		(0.3	)

Total—Foreign currency hedges		926.7		3.7		—		(0.3	)		(0.3	)

Total		2,776.5		3.7		0.1		(0.3	)		(7.6	)

As of June 30, 2026, the Company had interest rate swaps designated as cash flow hedges of variable-rate borrowings (for further information on borrowings, refer to Note 7 – Long-term debt - current and

non-current).

The objective of these cash flow hedges is to convert variable interest payments into fixed interest payments.

As of June 30, 2026, the Company had foreign exchange forward contracts designated as cash flow hedges of the Group’s

USD-denominated

intercompany revenues and revenue contracts with external customers. The program started in August, 2025 with the objective to hedge the variability in the forecasted revenues due to the foreign currency fluctuation risks associated with the specific forecasted USD revenues.

The hedged transactions are the Company’s discrete milestone sales, in an amount equal to the forward’s USD notional value, that are expected to occur on the forward’s maturity date. However, due to certain contractual milestones, they may occur at a later date, but will occur during the life of the contract.

Effects of hedge accounting

Amounts in Accumulated other comprehensive income (loss) are reclassified in the same periods during which the interest expense on the related hedged borrowings, or during which the hedged forecasted transaction (the revenue associated with the external third-party contract) is recognized in the consolidated statements of operations. The Company reviews the amounts deferred in OCI at each reporting date to ensure appropriate timing of OCI release.

Amounts deferred in Accumulated other comprehensive income (loss) for the interest rate hedge accounting were reclassified to the consolidated statement of operations as follows:


(in millions of $)	June 30, 2026			June 30, 2025
Gains (losses) recognized in OCI		22.8			(9.7	)
Reclassified to interest expense		(1.9	)		0.0

The estimated net amount of the existing gains or losses that are reported in accumulated other comprehensive income at the reporting date that is expected to be reclassified into earnings within the next 12 months amounted to $0.1 million and $(0.5) million as of June 30, 2026 and 2025 respectively.

The following table represents the amounts recognized in the statement of operation for the foreign currency hedge accounting, started in August, 2025:


(in millions of $)	June 30, 2026			June 30, 2025
Gains (losses) recognized in OCI		(32.8	)		—
Recycled to revenue		(0.8	)		—
Changes in spot-forward differential		11.3			—

Changes in spot-forward differential are recognized in the consolidated statement of operation. Spot rate changes during the period are reclassified to the consolidated statement of operation.

The Company did not discontinue any cash flow hedges during the six months ended June 30, 2026 or 2025.

Offsetting

Derivative instruments subject to master netting agreements are presented in the following table:


	June 30, 2026
(in millions of $)	Gross Amounts of Recognized Assets/ Liabilities			Gross Amounts Offset in the Statements of Financial Position		Net Amounts of Assets/ Liabilities Presented in the Statements of Financial Position			Gross Amounts Not Offset in the Statements of Financial Position				Net Amount
(in millions of $)	Gross Amounts of Recognized Assets/ Liabilities								Financial Instruments		Cash Collateral Received		Net Amount
Derivative assets		13.3			—		13.3			—		—		13.3
From which interest hedges		13.3			—		13.3			—		—		13.3
From which FX hedges		—			—		—			—		—		—
Derivative liabilities		(37.1	)		—		(37.1	)		—		—		(37.1	)
From which interest hedges		—			—		—			—		—		—
From which FX hedges		(37.1	)		—		(37.1	)		—		—		(37.1	)


	December 31, 2025
(in millions of $)	Gross Amounts of Recognized Assets/ Liabilities			Gross Amounts Offset in the Statement of Financial Position		Net Amounts of Assets/ Liabilities Presented in the Statements of Financial Position			Gross Amounts Not Offset in the Statements of Financial Position					Net Amount
(in millions of $)	Gross Amounts of Recognized Assets/ Liabilities			Gross Amounts Offset in the Statement of Financial Position					Financial Instruments			Cash Collateral Received		Net Amount
Derivative assets		3.8			—		3.8			(0.2	)		—		3.6
From which interest hedges		0.1			—		0.1			—			—		0.1
From which FX hedges		3.7			—		3.7			(0.2	)		—		3.5
Derivative liabilities		(7.9	)		—		(7.9	)		0.2			—		(7.7	)
From which interest hedges		(7.3	)		—		(7.3	)		—			—		(7.3	)
From which FX hedges		(0.6	)		—		(0.6	)		0.2			—		(0.4	)

The Company’s assets and liabilities measured at fair value on a recurring basis are disclosed in Note 24 – Fair value disclosures.

Besides market interest rate risk and the risk of foreign exchange rate fluctuation, the Company is exposed to credit risk in the event of

non-performance

by counterparties to its derivative instruments. The Company monitors counterparty credit risk on a regular basis. Credit risk on derivative financial instruments is mitigated through the use of counterparties that are major financial institutions with investment-grade credit ratings, and through the use of netting agreements.

As a result, the impact of credit valuation adjustments (“CVA”) and debit valuation adjustments (“DVA”) on the fair value of derivative instruments was not material, and no such adjustments were recognized. The Company did not enter into any derivative instruments that include credit-risk related to contingent features.

No cash collateral was posted or received under derivative contracts as of June 30, 2026 or December 31, 2025. Hedge effectiveness is assessed on a prospective and retrospective basis in accordance with ASC 815. No hedge ineffectiveness

was

posted during the six months ended June 30, 2026 or 2025.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
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+ Details

Derivative instruments and hedge accounting - Summary of Accumulated Other Comprehensive Income Loss For The Interest Rate Hedge Accounting (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Interest Rate Hedge
Derivative [Line Items]
Gains (losses) recognized in OCI	$ 22.8	$ (9.7)
Reclassified to interest expense	(1.9)	0.0
Foreign Exchange Contract [Member]
Derivative [Line Items]
Gains (losses) recognized in OCI	(32.8)	0.0
Recycled to revenue	(0.8)	0.0
Changes in spot-forward differential	$ 11.3	$ 0.0

Accumulated other comprehensive income (loss) (Tables)

6 Months Ended

Jun. 30, 2026

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Summary of accumulated other comprehensive income (loss)

Changes in the balances for each component of accumulated other comprehensive income (loss) were as follows:


	Three Months Ended June 30,
(in millions of $)	Currency translation reserve			Cash flow hedge reserve			Defined benefit plans reserve			Total
(in millions of $)	Currency translation reserve			Cash flow hedge reserve			Defined benefit plans reserve			Total
Balance as of April 1, 2025		(40.4	)		(5.2	)		(0.3	)		(45.9	)
Other comprehensive income (loss), net of taxes of $-, $1.5 and $(0.2)		26.3			(5.9	)		0.7			21.1
Reclass from AOCI, net of taxes of $-, $(0.1) and $0.0		—			0.3			0.0			0.3

Balance as of June 30, 2025		(14.1	)		(10.8	)		0.4			(24.5	)
Balance as of April 1, 2026		(15.3	)		(0.9	)		2.1			(14.1	)
Other comprehensive income (loss), net of taxes of $-, $1.8 and $0.3		7.8			(7.9	)		0.4			0.3
Reclass from AOCI, net of taxes of $-, $(0.2) and $0.0		—			(1.3	)		0.0			(1.3	)

Balance as of June 30, 2026		(7.5	)		(10.1	)		2.5			(15.1	)


	Six Months Ended June 30,
(in millions of $)	Currency translation reserve			Cash flow hedge reserve			Defined benefit plans reserve			Total
(in millions of $)	Currency translation reserve			Cash flow hedge reserve			Defined benefit plans reserve			Total
Balance as of January 1, 2025		(51.7	)		(3.3	)		(0.2	)		(55.2	)
Other comprehensive income (loss), net of taxes of $-, $1.9 and $(0.3)		37.6			(7.5	)		0.6			30.7
Reclass from AOCI, net of taxes of $-, $0.0 and $0.0		—			0.0			0.0			0.0

Balance as of June 30, 2025		(14.1	)		(10.8	)		0.4			(24.5	)
Balance as of January 1, 2026		(23.5	)		(0.6	)		3.5			(20.6	)
Other comprehensive income (loss), net of taxes of $-, $2.1 and $0.9		16.0			(7.2	)		(1.0	)		7.8
Reclass from AOCI, net of taxes of $-, $(0.4) and $0.0		—			(2.3	)		0.0			(2.3	)

Balance as of June 30, 2026		(7.5	)		(10.1	)		2.5			(15.1	)

Other assets

6 Months Ended

Jun. 30, 2026

Other Assets [Abstract]

Other assets

Note 15. Other assets

Other assets are comprised

the

following:


(in millions of $)	June 30, 2026		December 31, 2025
Governmental grants		28.3		34.4
Contract assets		68.1		58.8
Non-income based tax receivables		53.4		36.8
Income tax receivables		29.8		25.2
Other		28.3		25.6

Other current assets		207.9		180.8
Operating lease right-of-use assets		80.3		68.4
Contract acquisition costs		15.6		15.3
Deferred tax assets		16.6		15.1
Derivative instruments		13.3		0.1
Equity method investments		6.6		—
Other		8.7		5.5

Other non-current assets		141.1		104.4

Warranty provisions (Tables)

6 Months Ended

Jun. 30, 2026

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability


(in millions of $)	2026			2025
Balance as of January 1		60.8			55.1
Current year provisions		14.0			11.1
Expenditure		(9.5	)		(8.8	)
Other changes		(5.9	)		2.7

Balance as of June 30		59.4			60.1
current		23.0			19.1
non-current		36.4			41.0

Prepaid expenses (Tables)

6 Months Ended

Jun. 30, 2026

Prepaid Expense and Other Assets [Abstract]

Schedule of prepaid expense

Prepaid expenses are comprised of the following;


(in millions of $)	June 30, 2026		December 31, 2025
Advance payments to suppliers		154.0		99.2
Prepaid expenses, easements & rights of way		19.9		17.9
Other prepaid expenses		1.3		0.8

Total Prepaid expenses		175.2		117.9

Income taxes - Additional Information (Detail)	3 Months Ended		6 Months Ended
Income taxes - Additional Information (Detail)	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Income Tax Disclosure [Abstract]
Effective income tax rate	312.20%	22.50%	201.20%	23.60%

Inventories

6 Months Ended

Jun. 30, 2026

Inventory Disclosure [Abstract]

Inventories

Note 12. Inventories

Inventories are comprised of the following:


(in millions of $)	June 30, 2026		December 31, 2025
Finished goods		244.0		212.0
Raw materials and supplies		302.1		171.9
Work in process		282.3		188.5
Goods in transit		108.5		8.5
Unbilled shipments		21.2		20.3

Total inventories		958.1		601.2

Share-based compensation	6 Months Ended
Share-based compensation	Jun. 30, 2026
Share-Based Payment Arrangement [Abstract]
Share-based compensation	Note 23. Share-based compensation 2023 Long-Term Incentive Plan In October 2023, the Company adopted the Group Long-Term Incentive Plan (“2023 LTIP”) to provide a select group of managers the opportunity to participate in the Company’s value creation. Awards granted under the 2023 LTIP are subject to both performance-vesting and market-vesting conditions and provide for cash settlement upon the occurrence of certain exit events or a change in control (“Exit”). As both performance-vesting and market-vesting conditions for this plan were met on June 4, 2026, compensation expense for awards granted under the 2023 LTIP was remeasured and recognized on that date. As of June 30, 2026, total recognized compensation cost pre-tax was $61.5 million. No compensation expense had been recognized for the 2023 LTIP for the three and six months ended June 30, 2025. 2026 Incentive Award Plan In connection with the Company’s IPO, the Board of Directors adopted the INNIO N.V. 2026 Incentive Award Plan (the “2026 Plan”), which became effective in June 2026. The 2026 Plan provides for the grant of equity-based awards to employees, directors and other eligible service providers, including stock options, restricted share units (“RSUs”), restricted shares, share appreciation rights, performance awards and other share-based awards. The Company registered shares available for issuance under the 2026 Plan on a Form S-8 filed with the SEC on June 5, 2026. Grants of RSU Awards Pursuant to the 2026 Plan, the Company granted 1,499,879 RSUs to employees with a 4-year cliff vesting and 202,221 RSUs to non-executive directors with annual vesting over 2 years. RSUs granted are settleable in ordinary shares of the Company and had a weighted-average grant-date fair value of $32.53 per award. Vesting of each award is subject to the recipient’s continued service through each applicable vesting date. Awards include customary acceleration provisions in the event of death or disability and pro rata acceleration upon termination by us without cause. The awards also include a dividend equivalent feature equal to the amount of cash that is paid as a dividend on one share. All dividend equivalents shall be deemed to be reinvested in additional RSUs based on the fair market value of a share on the dividend payment date. Each additional RSU that results from deemed reinvestments of dividend equivalents shall vest whenever the underlying RSU to which such additional RSU relates vests. Measurement and recognition The Company accounts for share-based payments to employees and non-employee directors in accordance with ASC 718, Compensation — Stock Compensation. All awards granted are classified as equity awards. Because the awards have no exercise price, grant-date fair value per RSU equals the market price per ordinary share on the applicable grant date. Compensation cost is recognized on a straight-line basis over the requisite service period. For service-only graded-vesting awards we have elected straight-line attribution, subject to the requirement that cumulative compensation cost recognized at any reporting date equal or exceed the grant-date fair value of the portion of the award that has vested as of that date. We have elected to account for forfeitures of equity awards as they occur. Compensation cost recognized Share-based compensation expense recognized during the three and six month periods ended June 30, 2026 was $1.1 million. Share-based compensation cost is recorded in selling, general and administrative expenses in the consolidated statements of operations. As of June 30, 2026, total unrecognized compensation cost related to non-vested RSU awards under the 2026 Plan was $ 54.3 million.

Other liabilities - Summary of Other liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Schedule Of Other liabilities [Line Items]
Consideration payable	$ 51.3	$ 50.4
Non-income based tax liabilities	19.7	17.4
Provisions	24.3	23.3
Current portion of operating lease liability	21.0	18.4
Income tax liabilities	11.9	15.0
Current portion of long term debt—net	11.6	11.4
Other	29.1	17.5
Other current liabilities	194.5	153.7
Non-current portion of operating lease liability	60.3	50.9
Employee benefits	44.3	47.5
Provisions	36.7	40.1
Other	23.0	20.6
Other non-current liabilities	175.8	166.7
Derivative Financial Instruments Current Liabilities [Member]
Schedule Of Other liabilities [Line Items]
Derivative instruments	25.6	0.3
Derivative Financial Instruments Non Current Liabilities [Member]
Schedule Of Other liabilities [Line Items]
Derivative instruments	$ 11.5	$ 7.6

Goodwill and intangible assets

6 Months Ended

Jun. 30, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and intangible assets

Note 4. Goodwill and intangible assets

The following table summarizes the changes in the carrying amount of goodwill for the six months ended June 30, 2026:


	2026
(in millions of $)	Equipment			Services			Total
Balance as of January 1		618.8			1,067.8			1,686.6
Remeasurement		—			—			—
Foreign currency effect		(13.9	)		(23.9	)		(37.8	)

Balance as of June 30		604.9			1,043.9			1,648.8

Intangible assets:


	June 30, 2026
(in millions of $)	Gross carrying amount		Accumulated amortization			Net
Customer relationships		886.9		(485.8	)		401.1
Capitalized development costs		460.4		(344.0	)		116.4
Trade names & trademarks (indefinite)		202.0		—			202.0
Developed technology		0.8		(0.6	)		0.2

Total (1)		1,550.1		(830.4	)		719.7

(1)	Certain intangible assets are denominated in foreign currencies. As such, the change in intangible assets includes a component attributable to foreign currency translation.


	December 31, 2025
(in millions of $)	Gross carrying amount		Accumulated amortization			Net
Customer relationships		912.4		(473.4	)		439.0
Capitalized development costs		465.3		(334.2	)		131.1
Trade names & trademarks (indefinite)		207.0		—			207.0
Developed technology		0.8		(0.6	)		0.2

Total (1)		1,585.5		(808.2	)		777.3

(1)	Certain intangible assets are denominated in foreign currencies. As such, the change in intangible assets includes a component attributable to foreign currency translation.

Amortization expense of definite-lived intangible assets amounted to $22.3 million and $22.8 million for the three months ended

June 30, 2026, and 2025, and

$44.7 million and $45.4 million for the six months ended June 30, 2026 and 2025, respectively.

During the six months ended June 30, 2026, the Company did not identify any reporting units or indefinite-lived intangibles that required an impairment test.

Property, plant and equipment-net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Property, Plant and Equipment [Line Items]
Depreciation			$ 33.6	$ 26.7
Finance lease ROU assets	$ 25.7		25.7		$ 17.0
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation	$ 17.9	$ 14.2	$ 33.6	$ 26.7

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 905
-SubTopic 360
-Name Accounting Standards Codification
-Section 25
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478704/905-360-25-4

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 360
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482222/360-10-30-2

Reference 4: http://www.xbrl.org/2003/role/exampleRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

Derivative instruments and hedge accounting - Summary of Derivative Instruments Netting Agreements (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Derivative Instruments Netting Agreements [Line Items]
Derivative assets, Gross Amounts of Recognized Assets	$ 13.3	$ 3.8
Derivative liabilities, Gross Amounts of Recognized Liabilities	(37.1)	(7.9)
Derivative assets, Gross Amounts Offset in the Consolidated Statement of Financial Position	0.0	0.0
Derivative liabilities, Gross Amounts Offset in the Consolidated Statement of Financial Position	0.0	0.0
Derivative assets, Net Amounts Presented in the Consolidated Statements of Financial Position	13.3	3.8
Derivative liabilities, Net Amounts Presented in the Consolidated Statements of Financial Position	(37.1)	(7.9)
Derivative assets, Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0.0	(0.2)
Derivative liabilities, Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0.0	0.2
Derivative assets, Cash Collateral Received	0.0	0.0
Derivative liabilities, Cash Collateral Received	0.0	0.0
Derivative assets, Net Amount	13.3	3.6
Derivative liabilities, Net Amount	(37.1)	(7.7)
Interest Rate Hedge
Derivative Instruments Netting Agreements [Line Items]
Derivative assets, Gross Amounts of Recognized Assets	13.3	0.1
Derivative liabilities, Gross Amounts of Recognized Liabilities	0.0	(7.3)
Derivative assets, Gross Amounts Offset in the Consolidated Statement of Financial Position	0.0	0.0
Derivative liabilities, Gross Amounts Offset in the Consolidated Statement of Financial Position	0.0	0.0
Derivative assets, Net Amounts Presented in the Consolidated Statements of Financial Position	13.3	0.1
Derivative liabilities, Net Amounts Presented in the Consolidated Statements of Financial Position	0.0	(7.3)
Derivative assets, Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0.0	0.0
Derivative liabilities, Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0.0	0.0
Derivative assets, Cash Collateral Received	0.0	0.0
Derivative liabilities, Cash Collateral Received	0.0	0.0
Derivative assets, Net Amount	13.3	0.1
Derivative liabilities, Net Amount	0.0	(7.3)
Foreign Currency Hedges
Derivative Instruments Netting Agreements [Line Items]
Derivative assets, Gross Amounts of Recognized Assets	0.0	3.7
Derivative liabilities, Gross Amounts of Recognized Liabilities	(37.1)	(0.6)
Derivative assets, Gross Amounts Offset in the Consolidated Statement of Financial Position	0.0	0.0
Derivative liabilities, Gross Amounts Offset in the Consolidated Statement of Financial Position	0.0	0.0
Derivative assets, Net Amounts Presented in the Consolidated Statements of Financial Position	0.0	3.7
Derivative liabilities, Net Amounts Presented in the Consolidated Statements of Financial Position	(37.1)	(0.6)
Derivative assets, Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0.0	(0.2)
Derivative liabilities, Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0.0	0.2
Derivative assets, Cash Collateral Received	0.0	0.0
Derivative liabilities, Cash Collateral Received	0.0	0.0
Derivative assets, Net Amount	0.0	3.5
Derivative liabilities, Net Amount	$ (37.1)	$ (0.4)

Prepaid expenses - Summary of Prepaid expenses (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Prepaid Expense and Other Assets [Abstract]
Advance payments to suppliers	$ 154.0	$ 99.2
Prepaid expenses, easements & rights of way	19.9	17.9
Other prepaid expenses	1.3	0.8
Total Prepaid expenses	$ 175.2	$ 117.9

Fair value disclosures (Tables)

6 Months Ended

Jun. 30, 2026

Fair Value Disclosures [Abstract]

Summary of financial assets and liabilities measured at fair value on a recurring basis


	June 30, 2026
(in millions of $)	Carrying amount		Fair value		Fair value hierarchy level
(in millions of $)	Carrying amount		Fair value		Fair value hierarchy level
Assets
Derivative instruments		13.3		13.3		2
Liabilities
Debt		2,618.7		2,532.0		2
Contingent consideration		1.0		1.0		3
Derivative instruments		37.1		37.1		2


	December 31, 2025
(in millions of $)	Carrying amount		Fair value		Fair value hierarchy level
(in millions of $)	Carrying amount		Fair value		Fair value hierarchy level
Assets
Derivative instruments		3.8		3.8		2
Liabilities
Debt		2,658.8		2,699.7		2
Contingent consideration		2.7		2.7		3
Derivative instruments		7.9		7.9		2

Summary of fair values of contingent consideration

The fair values of contingent consideration as of the reporting dates reconcile as follows:


	Contingent consideration
(in millions of $)	2026			2025
Balance as of January 1		2.7			1.4
Additions		—			—
Adjustments/Payments		(1.7	)		0.9
Remeasurement effects		0.0			0.0

Balance as of June 30		1.0			2.3

Leases - Summary of Finance Lease Liability (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Finance Lease, Liability [Abstract]
Current portion of finance lease liability	$ 8.5	$ 2.7
Non-current portion of finance lease liability	18.0	15.1
Total finance lease liability	$ 26.5	$ 17.8

Revenue from contracts with customers - Summary of Company's sales are disaggregated by geographic market (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total	$ 937.7	$ 659.5	$ 1,606.5	$ 1,153.5
Germany [Member]
Disaggregation of Revenue [Line Items]
Total	82.2	75.0	154.4	147.9
Total Europe [Member]
Disaggregation of Revenue [Line Items]
Total	315.9	263.0	579.1	452.9
United States [Member]
Disaggregation of Revenue [Line Items]
Total	403.9	200.6	644.2	344.2
Total North America [Member]
Disaggregation of Revenue [Line Items]
Total	439.5	221.0	705.3	389.0
Rest of World [Member]
Disaggregation of Revenue [Line Items]
Total	182.3	175.5	322.1	311.6
Equipment [Member]
Disaggregation of Revenue [Line Items]
Total	569.3	354.1	891.8	564.3
Equipment [Member] \| Germany [Member]
Disaggregation of Revenue [Line Items]
Total	27.9	25.0	46.7	47.3
Equipment [Member] \| Total Europe [Member]
Disaggregation of Revenue [Line Items]
Total	143.7	109.4	231.9	152.8
Equipment [Member] \| United States [Member]
Disaggregation of Revenue [Line Items]
Total	320.3	150.5	500.7	243.3
Equipment [Member] \| Total North America [Member]
Disaggregation of Revenue [Line Items]
Total	334.5	151.3	520.6	252.3
Equipment [Member] \| Rest of World [Member]
Disaggregation of Revenue [Line Items]
Total	91.1	93.4	139.3	159.2
Service [Member]
Disaggregation of Revenue [Line Items]
Total	368.4	305.4	714.7	589.2
Service [Member] \| Germany [Member]
Disaggregation of Revenue [Line Items]
Total	54.3	50.0	107.7	100.6
Service [Member] \| Total Europe [Member]
Disaggregation of Revenue [Line Items]
Total	172.2	153.6	347.2	300.1
Service [Member] \| United States [Member]
Disaggregation of Revenue [Line Items]
Total	83.6	50.1	143.5	100.9
Service [Member] \| Total North America [Member]
Disaggregation of Revenue [Line Items]
Total	105.0	69.7	184.7	136.7
Service [Member] \| Rest of World [Member]
Disaggregation of Revenue [Line Items]
Total	$ 91.2	$ 82.1	$ 182.8	$ 152.4

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-5

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Revenue from contracts with customers - Additional Information (Detail) $ in Billions	6 Months Ended
	Jun. 30, 2026 USD ($)
Revenue from Contract with Customer [Abstract]
Revenue, remaining performance obligation, amount	$ 8.8
Revenue, remaining performance obligation, percentage	79.00%
Revenue, remaining performance obligation, period	24 months

Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement [Line Items]
Net sales	$ 937.7	$ 659.5	$ 1,606.5	$ 1,153.5
Gross profit	307.9	228.4	541.7	417.8
Selling, general, and administrative expenses	232.2	101.4	375.2	198.4
Research and development expenses	31.9	27.2	60.8	46.4
Other operating (income) expense—net	(1.3)	(1.3)	(2.5)	(3.1)
Operating income	45.1	101.1	108.2	176.1
Interest expense and related financing costs—net	52.9	21.5	123.7	50.1
Other (income) expense - net	(3.7)	(0.9)	(6.9)	(1.5)
Income (loss) before income taxes	(4.1)	80.5	(8.6)	127.5
Income tax expense	12.8	18.1	17.3	30.1
Net income (loss)	(16.9)	62.4	(25.9)	97.4
Net income (loss) attributable to non-controlling interests	(1.6)	(0.1)	(3.4)	(0.1)
Net income (loss) attributable to INNIO N.V. shareholders	$ (15.3)	$ 62.5	$ (22.5)	$ 97.5
Earnings (loss) per share attributable to INNIO N.V.: [Abstract]
Earnings (loss) per share, Basic	$ (0.02)	$ 0.08	$ (0.03)	$ 0.13
Earnings (loss) per share, Diluted	$ (0.02)	$ 0.08	$ (0.03)	$ 0.13
Weighted-average number of shares outstanding: [Abstract]
Weighted average number of shares outstanding, basic	750,000,000	750,000,000	750,000,000	750,000,000
Weighted average number of shares outstanding, diluted	750,000,000	750,000,000	750,000,000	750,000,000
Equipment And Products [Member]
Statement [Line Items]
Net sales	$ 569.3	$ 354.1	$ 891.8	$ 564.3
Cost of revenue	421.6	251.0	662.5	397.5
Services [Member]
Statement [Line Items]
Net sales	368.4	305.4	714.7	589.2
Cost of revenue	$ 208.2	$ 180.1	$ 402.3	$ 338.2

Segment reporting - Summary of Reconciliation of Adjusted Segment EBITDA to Net income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Adjusted Segment EBITDA Reconciliation [Line Items]
Interest expense and related financing costs - net	$ (52.9)	$ (21.5)	$ (123.7)	$ (50.1)
Income tax expense	(12.8)	(18.1)	(17.3)	(30.1)
Net income (loss)	(16.9)	62.4	(25.9)	97.4
Adjusted Segment EBITDA to Net Income [Member]
Adjusted Segment EBITDA Reconciliation [Line Items]
Total Adjusted Segment EBITDA	188.4	152.0	321.3	270.5
Unallocated corporate costs (HQ & other not included in Adjusted Segment EBITDA)	(16.1)	(7.9)	(26.5)	(12.4)
Acquisition and Divestment related gains (losses) - net	(0.5)	(0.7)	(0.7)	(0.4)
Transaction costs	(0.5)	0.0	(4.6)	0.0
Transformation costs	(1.8)	(3.1)	(5.3)	(5.7)
IPO and Public market readiness costs	(81.2)	(0.1)	(91.1)	(0.1)
Share-based compensation	(1.1)	0.0	(1.1)	0.0
Management adjustments	(85.1)	(3.9)	(102.8)	(6.2)
Other non-cash items	(2.0)	(2.1)	(5.5)	(3.7)
Depreciation and amortization	(40.1)	(37.0)	(78.3)	(72.1)
Other income (expense) - net	3.7	0.9	6.9	1.5
Interest expense and related financing costs - net	(52.9)	(21.5)	(123.7)	(50.1)
Income tax expense	(12.8)	(18.1)	(17.3)	(30.1)
Net income (loss)	$ (16.9)	$ 62.4	$ (25.9)	$ 97.4

Leases - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Leases [Abstract]
variable lease expense	$ 0	$ 0

Condensed Consolidated Balance Sheets - USD ($)
$ in Millions

Jun. 30, 2026

Dec. 31, 2025

Current assets

Cash and cash equivalents

$ 1,039.9

$ 689.5

Accounts receivable—net

234.2

204.4

Inventories

958.1

601.2

Prepaid expenses

175.2

117.9

Other current assets

207.9

180.8

Total current assets

2,615.3

1,793.8

Property, plant, and equipment—net

599.1

540.4

Goodwill

1,648.8

1,686.6

Intangible assets—net

719.7

777.3

Other non-current assets

141.1

104.4

Total assets

5,724.0

4,902.5

Current liabilities

Accounts payable

466.7

273.3

Contract liabilities

970.1

546.2

Accrued liabilities

235.4

186.1

Obligations under supplier finance programs

181.2

157.0

43.0

59.5

Other current liabilities

194.5

153.7

Total current liabilities

2,090.9

1,375.8

Long-term debt - net

2,607.1

2,647.4

Contract liabilities

426.8

269.9

Deferred taxes

204.3

214.6

Other non-current liabilities

175.8

166.7

Total liabilities

5,504.9

4,674.4

Commitments and guarantees

Shareholders' equity

Common stock, €0,04 nominal value; 750,000,000 shares issued and outstanding

^[1]

34.9

Additional paid-in capital

111.6

103.2

Retained earnings

77.8

100.3

Accumulated other comprehensive loss

(15.1)

(20.6)

Total INNIO N.V. shareholders' equity

209.2

217.8

Non-controlling interests

9.9

10.3

Total shareholders' equity

219.1

228.1

Total liabilities and shareholders' equity

$ 5,724.0

$ 4,902.5

[1]	The nominal value, shares issued and outstanding and additional paid-in capital have been adjusted for the 2025 balance. Refer to Note 22 for more information.

Long-term debt-current and non-current

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

Long-term debt-current and non-current

Note 7. Long-term debt—current and

non-current

The Company’s current and

non-current

portions of long-term debt are comprised of the following:


(in millions of $)	June 30, 2026		December 31, 2025
Long-term debt—net		2,607.1		2,647.4
Current portion of Long-term debt—net		11.6		11.4

Total		2,618.7		2,658.8

Unamortized issuance

costs deducted from debt were $

9.2

million and $

14.0

million as of June 30, 2026 and December 31, 2025, respectively.

Available facilities as of June 30, 2026 are:

Facility drawn

Nominal
Amount (a)

Currency

Rate /Margin (b)

Maturity

Term Loan B—EUR

1,100.0

EUR

Euribor + 2.00% (0% floor)

11/2/2031

Term Loan B—USD

1,339.5

USD

SOFR + 1.75% (0% floor)

11/2/2031

Term Facility—CAD

49.0

CAD

CORRA + 1.36%

9/25/2030

Facility undrawn

Revolving Credit Facility (RCF)

210.0

EUR

SOFR/Euribor + 2.00%

5/2/2031

Ancillary Facility – ERSTE Bank (c)

40.0

EUR

SOFR/Euribor + 2.50%

7/31/2027

Ancillary Facility – HELABA

50.0

EUR

SOFR/Euribor + 2.00%

5/2/2031

(a)	Nominal amounts without principal amortization payments.

(b)	The table includes the conditions as of 30.06.2026 and loans bear variable interest rates based on Secured Overnight Finance Rate (“SOFR”), Euro Interbank Offered Rate (“EURIBOR”) or Canadian Overnight Repo Rate Average (‘‘CORRA’’) plus applicable margins depending on the leverage ratios.

(c)	$ 36.5 million of the ERSTE Bank ancillary facility line was temporarily allocated to the supplier finance program as of June 30, 2026.

Interest expense on loans & borrowings (including the effect of hedging) were $34.3 million and $28.0 million for the three months ended

June 30, 2026 and 2025

and $68.8 million and $56.0 million for the six months ended June 30, 2026 and 2025, respectively.

Amortization of issuance costs and debt extinguishment costs were $0.4 million and $1.1 million for the three months ended

June 30, 2026 and 2025

and $7.8 million and $2.1 million for the six months ended June 30, 2026 and 2025, respectively.

The following table summarizes the undiscounted future cash outflows of the Company’s long-term debt including interest:


(in millions of $)	2026		2027		2028		2029		2030		Thereafter		Total
Principal		7.6		15.8		14.6		15.1		44.7		2,530.1		2,627.9
Interest		64.8		127.9		127.4		126.3		125.2		103.6		675.2

Total		72.4		143.7		142.0		141.4		169.9		2,633.7		3,303.1

On February 16, 2026, the Company amended the SFA and refinanced the Facility B2. Following the amendment, commitments under the Facility B (EUR) and Facility B (USD) were €1,100.0 million and $

1,339.5

million, respectively. The amendment lowered the margin of Facility B (EUR) and Facility B (USD) to 2.5% and 2.0%, which resulted in effective margins used to amortize debt issuance costs of 2.56% and 2.06%, respectively (please refer above for the structure of effective interest rate). As a result of the amended SFA, the facilities will mature on November 2, 2031. The Euro-denominated loan facility is to be repaid at maturity, the U.S. dollar-denominated facility requires quarterly installment payments of $3.3 million beginning

mid-2026.

As of June 30, 2026, €1,100.0 million and $

1,336.2

million, respectively, were still outstanding.

The Company evaluated the February 16, 2026 refinancing under ASC

470-50,

Debt—Modifications and Extinguishments, to determine whether the transaction represented a debt modification or extinguishment. This evaluation was performed on a

lender-by-lender

basis and considered changes in lender participation and whether changes in terms were substantial. For lenders that exited the syndicate, the refinancing was accounted for as a debt extinguishment, and the related unamortized debt issuance costs were expensed. For lenders that reduced their commitments, a proportionate amount of previously capitalized financing costs was expensed. For continuing lenders whose modified terms did not result in a change in the present value of future cash flows exceeding 10%, the refinancing was accounted for as a debt modification, with third-party fees expensed.

As a result of the refinancing, the Company expensed $3.0 million of unamortized debt issuance costs related to the portions of the SFA accounted for as extinguishments and continues to amortize $8.2 million of deferred financing costs related to the portion of debt that remained outstanding and was accounted for as a modification. In addition, the Company incurred new financing costs of $3.3 million, which were expensed in accordance with the ASC 470 assessment.

Upon the

losing

of the IPO on June 5 2026, the margin (at each level of the margin ratchet) applicable to the Term Loan B facilities and the RCF was reduced by

0.50

% per annum (subject to a minimum floor of

1.75

% applicable to Consolidated Term Loan B – USD only).

The Company also has access to a revolving credit facility (“RCF”) and ancillary facilities.

In June 2026, the Company executed an amend and extend transaction for the RCF of $225 million and the €250 million guarantee facility. The RCF was increased and redenominated from $225.0 million (comprising of $140.0 million RCF, $45.0 million ancillary facility with Landesbank

Hessen-Thüringen

Girozentrale, as well as a $40.0 million ancillary facility with Erste Group Bank AG) to €300.0 million (comprising of €210.0 million RCF, €50.0 million ancillary facility with Landesbank

Hessen-Thüringen

Girozentrale

as well as a €40.0 million ancillary facility with Erste Group Bank

AG).

part of the transaction, the maturity of the €250.0 million guarantee facility, the €210.0 million RCF and the €50.0 million ancillary facility with Landesbank

Hessen-Thüringen

Girozentrale was extended from May 2028 to May 2031. As a result of the refinancing, the Company incurred new financing costs of $3.3 million which were capitalized in accordance with the ASC 470

assessment and will be amortized over the facility term.

Separately in June 2026, the maturity of the €40.0 million ancillary facility with Erste Group Bank AG was extended from July 2026 to July 2027 (subject to annual extension).

The RCF is subject to

an annual

commitment fee equal to 30% of the applicable revolving facility margin, calculated on the undrawn amount of the RCF.

The Company’s borrowings are primarily secured by a pledge of

shares in subsidiaries,

liens over the Company’s bank accounts along with certain assets of the Company, mainly relating to the North American subsidiaries.

The total assets pledged as collateral in connection with the Company’s borrowing arrangements were:


(in millions of $)	June 30, 2026		December 31, 2025
Cash and cash equivalents		697.4		430.4
Accounts receivable—net		106.9		78.4
Inventories		429.4		221.4
Other current assets		25.5		8.4
Property, plant, and equipment—net		118.3		106.3
Intangible assets—net		26.7		27.8
Other non-current assets		12.7		10.0

Total		1,416.9		882.7

The Company was in compliance with all applicable financial covenants as of June 30, 2026 and December 31, 2025. In the event of

non-compliance

with the financial covenants or the occurrence of an event of default under the Senior Facilities Agreement (“SFA”), the lenders may, at their discretion, exercise remedies available under the agreement, including acceleration of outstanding borrowings. Fees related to the unused portions of the facilities were not material for the six months ended June 30, 2026 and 2025.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
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+ Details

Fair value disclosures - Summary of financial assets and liabilities measured at fair value on a recurring basis (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Liabilities, Carrying amount
Debt	$ 2,618.7	$ 2,658.8
Fair value hierarchy level 2
Assets, Carrying amount
Derivative instruments	13.3	3.8
Liabilities, Carrying amount
Debt	2,618.7	2,658.8
Derivative instruments	37.1	7.9
Assets, Fair value
Derivative instruments	13.3	3.8
Liabilities, Fair value
Debt	2,532.0	2,699.7
Derivative instruments	37.1	7.9
Fair value hierarchy level 3
Liabilities, Carrying amount
Contingent consideration	1.0	2.7
Liabilities, Fair value
Contingent consideration	$ 1.0	$ 2.7

Long-term debt - current and non-current - Summary of assets pledged as collateral in connection with the borrowing (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Cash and cash equivalents	$ 1,039.9	$ 689.5
Accounts receivable—net	234.2	204.4
Inventories	958.1	601.2
Other current assets	207.9	180.8
Property, plant, and equipment—net	599.1	540.4
Intangible assets—net	719.7	777.3
Other non-current assets	141.1	104.4
Total	5,724.0	4,902.5
Long-Term Debt [Member]
Debt Instrument [Line Items]
Cash and cash equivalents	697.4	430.4
Accounts receivable—net	106.9	78.4
Inventories	429.4	221.4
Other current assets	25.5	8.4
Property, plant, and equipment—net	118.3	106.3
Intangible assets—net	26.7	27.8
Other non-current assets	12.7	10.0
Total	$ 1,416.9	$ 882.7

Employee benefits - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Defined Benefit Plan Disclosure [Line Items]
Defined benefit liability	$ 31,100,000		$ 31,100,000		$ 31,600
Defined benefit plan, expected future benefit payment, 2026	800,000		800,000
Defined benefit plan, expected future benefit payment, 2027	700,000		700,000
Defined benefit plan, expected future benefit payment, 2028	1,300,000		1,300,000
Defined benefit plan, expected future benefit payment, 2029	1,600,000		1,600,000
Defined benefit plan, expected future benefit payment, 2030	3,300,000		3,300,000
Defined benefit plan, expected future benefit payment, 2031 through 2035	14,000,000		14,000,000
Austria [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans	11,600,000	$ 10,100,000	23,500,000	$ 19,900,000
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans	$ 3,300,000	$ 2,500,000	$ 4,300,000	$ 3,300,000

Property, plant and equipment-net

6 Months Ended

Jun. 30, 2026

Property, Plant and Equipment [Abstract]

Property, plant and equipment-net

Note 5. Property, plant and equipment—net

Property, plant and equipment—net is comprised of the following:


(in millions of $)	June 30, 2026			December 31, 2025
Property, plant, and equipment—original cost		965.1			881.2
Accumulated depreciation		(366.0	)		(340.8	)

Total Property, plant, and equipment—net		599.1			540.4

Depreciation related to property, plant and equipment amounted to $17.9 million and $14.2 million for the three months ended June 30, 2026 and 2025

and $33.6 million and $26.7 million for the six months ended June 30, 2026 and 2025, respectively.

Finance lease

right-of-use

(“ROU”) assets had a net carrying amount of $25.7 million and $17.0 million as of June 30, 2026 and December 31, 2025, respectively.

- Definition

The entire disclosure for property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147477798/958-360-50-7

+ Details

Accrued liabilities -Summary of Accrued liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Accrued Liabilities [Abstract]
Personnel accruals	$ 134.0	$ 89.0
Accrual for outstanding invoices	54.6	48.4
Accrued interest	19.1	30.5
Accrued freight expenses	13.3	9.3
Accruals for professional fees	9.3	4.8
Other accruals	5.1	4.1
Accrued liabilities	$ 235.4	$ 186.1

Accounts receivable - net

6 Months Ended

Jun. 30, 2026

Receivables [Abstract]

Accounts receivable - net

Note 14. Accounts receivable - net

Accounts receivable - net is comprised of the following:


(in millions of $)	June 30, 2026			December 31, 2025
Customer receivables		242.6			212.6
Allowance for credit losses		(8.4	)		(8.2	)

Total accounts receivable - net		234.2			204.4

The following table provides the roll-forward of the credit loss allowances recognized for the accounts receivable not yet sold:


(in millions of $)	2026			2025
Balance as of January 1		(8.2	)		(7.8	)
Changes to the current provision		(0.8	)		(2.4	)
Write-offs, net		0.5			0.3
Foreign currency effect		0.1			(0.4	)

Balance as of June 30		(8.4	)		(10.3	)

When necessary, the Company records an allowance for credit losses for individually evaluated customer accounts deemed uncollectible in accordance with ASC 326. Such individually evaluated receivables totaled $5.3 million and $5.5 million as of June 30, 2026 and December 31, 2025, respectively. Account balances are written off against the allowance for credit losses in the period in which it is determined that collection is not probable. Write-offs amounted to $0.4 million and $0.2 million for the three months ended June 30, 2026 and 2025, respectively.

As of June 30, 2026 and December 31, 2025, the Company derecognized accounts receivable of $180.4 million and $175.2 million, respectively, in connection with its receivables factoring program that is accounted for as sales. Cash proceeds received from these transfers totaled $179.5 million

as of

June 30, 2026 and $173.6 million for the year ended December 31, 2025. Factoring fees recognized on receivables sold under the factoring program amounted to $0.5 million and $0.3

million for the three months ended June 30, 2026 and 2025, and

$0.9 million and $0.7 million for the six months ended June 30, 2026 and 2025, respectively. The obligations related to factoring arrangements in the consolidated statements of financial position represent cash collected from customers after the transfer of trade receivables and remitted on behalf of the factors.

Goodwill and intangible assets - Summary of Carrying Amount of Goodwill (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Goodwill [Line Items]
Beginning balance	$ 1,686.6
Remeasurement	0.0
Foreign currency effect	(37.8)
Ending balance	1,648.8
Equipment [Member]
Goodwill [Line Items]
Beginning balance	618.8
Remeasurement	0.0
Foreign currency effect	(13.9)
Ending balance	604.9
Service [Member]
Goodwill [Line Items]
Beginning balance	1,067.8
Remeasurement	0.0
Foreign currency effect	(23.9)
Ending balance	$ 1,043.9

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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+ Details

Goodwill and intangible assets (Tables)

6 Months Ended

Jun. 30, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Carrying Amount of Goodwill

The following table summarizes the changes in the carrying amount of goodwill for the six months ended June 30, 2026:


	2026
(in millions of $)	Equipment			Services			Total
Balance as of January 1		618.8			1,067.8			1,686.6
Remeasurement		—			—			—
Foreign currency effect		(13.9	)		(23.9	)		(37.8	)

Balance as of June 30		604.9			1,043.9			1,648.8

Summary of Intangible Assets

Intangible assets:


	June 30, 2026
(in millions of $)	Gross carrying amount		Accumulated amortization			Net
Customer relationships		886.9		(485.8	)		401.1
Capitalized development costs		460.4		(344.0	)		116.4
Trade names & trademarks (indefinite)		202.0		—			202.0
Developed technology		0.8		(0.6	)		0.2

Total (1)		1,550.1		(830.4	)		719.7

(1)	Certain intangible assets are denominated in foreign currencies. As such, the change in intangible assets includes a component attributable to foreign currency translation.


	December 31, 2025
(in millions of $)	Gross carrying amount		Accumulated amortization			Net
Customer relationships		912.4		(473.4	)		439.0
Capitalized development costs		465.3		(334.2	)		131.1
Trade names & trademarks (indefinite)		207.0		—			207.0
Developed technology		0.8		(0.6	)		0.2

Total (1)		1,585.5		(808.2	)		777.3

(1)	Certain intangible assets are denominated in foreign currencies. As such, the change in intangible assets includes a component attributable to foreign currency translation.

- Definition

Tabular disclosure of goodwill.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482548/350-20-55-24

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A

+ Details

Variable interest entities	6 Months Ended
Variable interest entities	Jun. 30, 2026
Variable Interest Entity [Abstract]
Variable interest entities	Note 26. Variable interest entities Welland, Canada Production Facility The Company holds an investment in a variable interest entity (“Welland VIE”) that was created in the third quarter of 2025 together with a group of investors to acquire, own, and lease land and buildings used in the Company’s production operations in Welland, Canada. The Welland VIE is financed through a combination of equity contributions from investors and third-party debt. The Company’s variable interests in the Welland VIE consist of its equity investment and a lease arrangement for the production facility in Welland, Canada. The Company determined that it is the primary beneficiary of the Welland VIE because it has (i) the power to direct the activities that most significantly impact the Welland VIE’s economic performance and (ii) the obligation to absorb losses and the right to receive benefits that could potentially be significant to the Welland VIE. Accordingly, the Company consolidates the Welland VIE. The Welland VIE’s assets and liabilities included in the Company’s consolidated statements of financial position primarily consist of debt of $33.7 million as of June 30, 2026. The Company has no obligation to provide additional financial support to the Welland VIE and creditors of the Welland VIE have no recourse to the Company. Nordic LuxCo / Heaten Group The Company holds a 24.9% equity interest in Nordic LuxCo, which was acquired through a non-cash capital contribution from its parent on March 30, 2026. See Note 25 – Related party transactions for a description of the related-party service and manufacturing agreements with Heaten Germany GmbH, a subsidiary of Nordic LuxCo. The Company has determined that it is not the primary beneficiary of Nordic LuxCo because it does not have the power to direct the activities that most significantly impact Nordic LuxCo’s economic performance, which are governed by Nordic LuxCo’s board of directors and its majority shareholder. Accordingly, Nordic LuxCo is not consolidated by the Company and the Company accounts for its interest under the equity method of accounting. The carrying amount of the Company’s investment in Nordic LuxCo was approximately $6.6 million as of June 30, 2026. The Company’s maximum exposure to loss as of June 30, 2026 was $7.4 million, limited to the carrying amount of its investment and amounts receivable under the related service and manufacturing arrangements. The Company has not provided any explicit guarantees or other forms of financial support to Nordic LuxCo beyond its equity investment.

Long-term debt - current and non-current - Additional Information (Detail) € in Millions, $ in Millions		3 Months Ended		6 Months Ended
	Feb. 16, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2026 EUR (€)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 EUR (€)	Feb. 16, 2026 EUR (€)	Dec. 31, 2025 USD ($)
Line of Credit Facility [Line Items]
Unamortized issuance costs		$ 9.2		$ 9.2					$ 14.0
Interest expense on loans & borrowings (including the effect of hedging)		34.3	$ 28.0	68.8		$ 56.0
Amortization of issuance costs and debt extinguishment costs		0.4	$ 1.1	7.8		$ 2.1
Principal amount	$ 1,339.5							€ 1,100.0
Quarterly installment payments	$ 3.3
Debt Outstanding				$ 1,336.2	€ 1,100.0
Description of Continuing Lenders Whose Modified Terms				For continuing lenders whose modified terms did not result in a change in the present value of future cash flows exceeding 10%, the refinancing was accounted for as a debt modification, with third-party fees expensed.	For continuing lenders whose modified terms did not result in a change in the present value of future cash flows exceeding 10%, the refinancing was accounted for as a debt modification, with third-party fees expensed.
Unamortized debt issuance costs		3.0		$ 3.0
Amortized deferred financing costs		8.2		8.2
Financing cost		3.3		3.3
Long-term line of credit		225.0		$ 225.0			€ 250.0
Line of credit facility, commitment fee percentage				30.00%	30.00%
Minimum [Member]
Line of Credit Facility [Line Items]
Applicable margin	2.00%
Amortization of debt issuance cost percentage	2.06%							2.06%
Maximum [Member]
Line of Credit Facility [Line Items]
Applicable margin	2.50%
Amortization of debt issuance cost percentage	2.56%							2.56%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate during period				0.50%	0.50%
Percentage of credit facility floor rate				1.75%	1.75%
Long-term line of credit		140.0		$ 140.0			210.0
Line of credit maturity amount \| €							210.0
Revolving Credit Facility [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Long-term line of credit		225.0		225.0
Revolving Credit Facility [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Long-term line of credit \| €							300.0
Ancillary Facility Landesbank [Member]
Line of Credit Facility [Line Items]
Long-term line of credit		45.0		45.0			50.0
Line of credit maturity amount \| €							50.0
Ancillary Facility Erste Group Bank [Member]
Line of Credit Facility [Line Items]
Long-term line of credit		$ 40.0		$ 40.0			40.0
Line of credit maturity amount \| €							40.0
Guarantee Facility [Member]
Line of Credit Facility [Line Items]
Line of credit maturity amount \| €							€ 250.0

Segment reporting - Additional Information (Detail)	6 Months Ended
Segment reporting - Additional Information (Detail)	Jun. 30, 2026 Segments
Segment Reporting [Line Items]
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The CODM uses Adjusted Segment EBITDA as the primary measure of segment profit or loss to assess segment performance and allocate resources. The CODM reviews Adjusted Segment EBITDA by segment in the annual budgeting process and in quarterly business reviews, including comparisons to budget, prior year and the latest forecast.
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	Chief Executive Officer [Member]
Reportable Segment, Aggregation before Other Operating Segment [Member]
Segment Reporting [Line Items]
Number of reportable segments	2

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-34

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (ee)
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-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26A

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 25
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 25
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (h)
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-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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Reference 21: http://www.xbrl.org/2003/role/disclosureRef
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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-15

+ Details

Derivative instruments and hedge accounting - Summary of Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Derivative [Line Items]
Notional amount	$ 3,631.9	$ 2,776.5
Derivative assets	13.3	3.8
Derivative liabilities	(37.1)	(7.9)
Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsCurrent
Derivative [Line Items]
Derivative assets	0.0	3.7
Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsNoncurrent
Derivative [Line Items]
Derivative assets	13.3	0.1
Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesCurrent
Derivative [Line Items]
Derivative liabilities	(25.6)	(0.3)
Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesNoncurrent
Derivative [Line Items]
Derivative liabilities	(11.5)	(7.6)
Interest Rate Swaps
Derivative [Line Items]
Notional amount	1,822.3	1,849.8
Derivative assets	13.3	0.1
Derivative liabilities	0.0	(7.3)
Interest Rate Swaps \| Euribor
Derivative [Line Items]
Notional amount	877.3	904.8
Interest Rate Swaps \| SOFR
Derivative [Line Items]
Notional amount	945.0	945.0
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsCurrent
Derivative [Line Items]
Derivative assets	0.0	0.0
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsCurrent \| Euribor
Derivative [Line Items]
Derivative assets	0.0	0.0
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsCurrent \| SOFR
Derivative [Line Items]
Derivative assets	0.0	0.0
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsNoncurrent
Derivative [Line Items]
Derivative assets	13.3	0.1
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsNoncurrent \| Euribor
Derivative [Line Items]
Derivative assets	4.2	0.1
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsNoncurrent \| SOFR
Derivative [Line Items]
Derivative assets	9.1	0.0
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesCurrent
Derivative [Line Items]
Derivative liabilities	0.0	0.0
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesCurrent \| Euribor
Derivative [Line Items]
Derivative liabilities	0.0	0.0
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesCurrent \| SOFR
Derivative [Line Items]
Derivative liabilities	0.0	0.0
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesNoncurrent
Derivative [Line Items]
Derivative liabilities	0.0	(7.3)
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesNoncurrent \| Euribor
Derivative [Line Items]
Derivative liabilities	0.0	(2.5)
Interest Rate Swaps \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesNoncurrent \| SOFR
Derivative [Line Items]
Derivative liabilities	0.0	(4.8)
Foreign Currency Hedges
Derivative [Line Items]
Notional amount	1,809.6	926.7
Foreign Currency Hedges \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsCurrent
Derivative [Line Items]
Derivative assets	0.0	3.7
Foreign Currency Hedges \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsNoncurrent
Derivative [Line Items]
Derivative assets	0.0	0.0
Foreign Currency Hedges \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesCurrent
Derivative [Line Items]
Derivative liabilities	(25.6)	(0.3)
Foreign Currency Hedges \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesNoncurrent
Derivative [Line Items]
Derivative liabilities	(11.5)	(0.3)
Foreign Currency Hedges
Derivative [Line Items]
Notional amount	1,809.6	926.7
Derivative assets	0.0	3.7
Derivative liabilities	(37.1)	(0.6)
Foreign Currency Hedges \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsCurrent
Derivative [Line Items]
Derivative assets	0.0	3.7
Foreign Currency Hedges \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherAssetsNoncurrent
Derivative [Line Items]
Derivative assets	0.0	0.0
Foreign Currency Hedges \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesCurrent
Derivative [Line Items]
Derivative liabilities	(25.6)	(0.3)
Foreign Currency Hedges \| Location, Statement of Financial Position, Balance [Axis]: _2:OtherLiabilitiesNoncurrent
Derivative [Line Items]
Derivative liabilities	$ (11.5)	$ (0.3)

Segment reporting

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

Segment reporting

Note 3. Segment reporting

Effective December 2025, the Company realigned its internal reporting structure to reflect changes in how the Chief Operating Decision Maker (“CODM”) reviews budgets and forecasts, operating results, evaluates performance and allocates resources. As a result, the Company now manages its business in two reportable segments: (i) Equipment and (ii) Services.

•

The Equipment Segment designs, manufactures, and sells new Jenbacher and Waukesha engines, project-related equipment, and related solutions. Equipment segment revenues are further disaggregated by end market into Data Center, Power Solutions, and Compression, consistent with how the CODM evaluates performance across key markets.

•

The Services Segment provides aftermarket services through an engine’s lifecycle, including long-term service agreements, spare parts, overhauls, remanufacturing of engines and components, digital solutions, and other service-related activities.

Prior to December 2025, the Company’s internal management reporting was prepared in accordance with International Financial Reporting Standards (“IFRS”). For purposes of these consolidated financial statements, segment information for the three months and six months ended June 30, 2025 has been converted to U.S. GAAP and revised to be consistent with the aforementioned modified segment organization and reporting structure, as well as the Company’s presentation currency.

The Company’s CODM is the senior management team, consisting of the

Chief Executive Officer

and Chief Financial Officer.

The CODM uses Adjusted Segment EBITDA as the primary measure of segment profit or loss to assess segment performance and allocate resources. The CODM reviews Adjusted Segment EBITDA by segment in the annual budgeting process and in quarterly business reviews, including comparisons to budget, prior year and the latest forecast. These reviews are used by the CODM to make decisions regarding prioritization of resources (such as staffing and discretionary spending), sequencing of operational initiatives, and capital investment priorities across the Equipment and Services Segments.

Adjusted Segment EBITDA is defined as earnings before interest, income taxes, depreciation and amortization, adjusted for items that management believes are not indicative of core operating performance, including restructuring costs, transaction related costs associated with acquisitions and other strategic activities, transformation costs related to significant organizational change initiatives, costs incurred for IPO and public-market readiness costs and share-based compensation.

Certain corporate functions, including Group Management, Compliance, Executive Consultancy, Communication, Group Treasury, Transformation and Legal are not allocated to operating segments and are reported as unallocated corporate costs. Other shared costs may be allocated to segments based on usage, when applicable, in a manner consistent with the CODM reporting package.

Revenues are reported for the Equipment and Service groupings described above;

sub-unit

information is presented where it is regularly provided to the CODM.


	Three Months Ended June 30,				Six Months Ended June 30,
(in millions of $)	2026		2025		2026		2025
Equipment revenue
Data Center		232.4		118.0		339.4		170.3
Power Solutions		273.6		181.5		441.7		295.8
Compression		63.3		54.6		110.7		98.2

Total equipment revenue		569.3		354.1		891.8		564.3
Service revenue
Transactional		236.1		192.8		442.3		364.8
Contractual		132.3		112.6		272.4		224.4

Total service revenue		368.4		305.4		714.7		589.2

Total revenue		937.7		659.5		1,606.5		1,153.5

Contractual Service Agreements (“CSAs”), which cover parts and labor, and Material Stream Agreements (“MSAs”), which cover parts only, together comprise our long-term service agreements (“LSAs”). LSAs and digital solutions including myPlant together form Contractual Services. Transactional services cover transactional parts and labor, overhaul and repair, engine conversions, modifications and upgrades (“CM&U”) and commissioning.

There are no intersegment revenues in the periods presented.

The following expense categories are regularly reviewed by the CODM and are included in the determination of Adjusted Segment EBITDA:

•

Cost of goods and services sold, including materials and components, direct manufacturing labor, warranty provisions, cost of quality, logistics and freight, other variable costs, manufacturing variances from standard costs, and variable factory overhead.

•

Selling, general & administrative expenses, including selling, marketing, and segment-level administrative costs.

•

Research and development expenses, and

•

Other segment items, primarily consisting of other operating income or expense,

non-significant

cost categories, and limited management adjustments reviewed by the CODM.

Selected financial information for each segment is as follows:


	Three Months Ended June 30, 2026
(in millions of $)	Equipment			Service			Total from Reportable Segments
Total revenue		569.3			368.4			937.7
Less: Significant segment expenses regularly provided to the CODM (a)
Cost of goods and services sold		(421.6	)		(208.2	)		(629.8	)
Research and development		(20.6	)		(11.3	)		(31.9	)
Selling, general and administrative expenses		(65.0	)		(53.6	)		(118.6	)
Depreciation and amortization		14.4			12.7			27.1
Other non-cash items (b)		1.2			0.8			2.0
Management adjustments (c)		0.4			0.9			1.3
Other segment items (d)		0.5			0.1			0.6

Adjusted Segment EBITDA (e)		78.6			109.8			188.4


	Three Months Ended June 30, 2025
(in millions of $)	Equipment			Service			Total from Reportable Segments
Total revenue		354.1			305.4			659.5
Less: Significant segment expenses regularly provided to the CODM (a)
Cost of goods and services sold		(251.0	)		(180.1	)		(431.1	)
Research and development		(13.9	)		(13.3	)		(27.2	)
Selling, general and administrative expenses		(35.9	)		(40.6	)		(76.5	)
Depreciation and amortization		11.3			13.3			24.6
Other non-cash items (b)		1.2			0.9			2.1
Management adjustments (c)		0.1			0.5			0.6
Other segment items (d)		0.2			(0.2	)		—

Adjusted Segment EBITDA (e)		66.1			85.9			152.0


	Six Months Ended June 30, 2026
(in millions of $)	Equipment			Service			Total from Reportable Segments
Total revenue		891.8			714.7			1,606.5
Less: Significant segment expenses regularly provided to the CODM (a)
Cost of goods and services sold		(662.5	)		(402.3	)		(1,064.8	)
Research and development		(39.3	)		(21.5	)		(60.8	)
Selling, general and administrative expenses		(120.5	)		(100.3	)		(220.8	)
Depreciation and amortization		27.1			25.2			52.3
Other non-cash items (b)		3.3			2.2			5.5
Management adjustments (c)		0.6			1.5			2.1
Other segment items (d)		1.0			0.3			1.3

Adjusted Segment EBITDA (e)		101.5			219.8			321.3


	Six Months Ended June 30, 2025
(in millions of $)	Equipment			Service			Total from Reportable Segments
Total revenue		564.3			589.2			1,153.5
Less: Significant segment expenses regularly provided to the CODM (a)
Cost of goods and services sold		(397.5	)		(338.2	)		(735.7	)
Research and development		(23.8	)		(22.6	)		(46.4	)
Selling, general and administrative expenses		(73.3	)		(80.9	)		(154.2	)
Depreciation and amortization		21.9			26.1			48.0
Other non-cash items (b)		2.1			1.6			3.7
Management adjustments (c)		0.1			0.9			1.0
Other segment items (d)		0.5			0.1			0.6

Adjusted Segment EBITDA (e)		94.3			176.2			270.5

Note

(a)

(b)	Other non-cash items include amortization expenses of capitalized costs to obtain contracts.

(c)	Management adjustments are described below in the reconciliation of Adjusted Segment EBITDA to Net income.

(d)

non-significant

(e)	Adjusted Segment EBITDA is the CODM’s segment profit measure. Corporate/unallocated costs (“HQ”) are not included in Adjusted Segment EBITDA and are presented in the reconciliation to consolidated Net income.

The above expense categories are derived from internal management reports and may not correspond directly to the line items in the consolidated statements of operations. The reconciliation below represents how segment results reconcile to the consolidated financial statements.

Reconciliation of Adjusted Segment EBITDA to Net income

Adjusted Segment EBITDA is reconciled to Net income by presenting unallocated corporate costs not included in segment results, management adjustments, other

non-cash

items, depreciation and amortization, Interest and other financial charges—net,

non-operating

income (expense) and Income tax expense.


	Three Months Ended June 30,						Six Months Ended June 30,
(in millions of $)	2026			2025			2026			2025
Total Adjusted Segment EBITDA		188.4			152.0			321.3			270.5
Unallocated corporate costs (HQ & other not included in Adjusted Segment EBITDA)		(16.1	)		(7.9	)		(26.5	)		(12.4	)
Acquisition and Divestment related gains (losses) - net		(0.5	)		(0.7	)		(0.7	)		(0.4	)
Transaction costs		(0.5	)		—			(4.6	)		—
Transformation costs		(1.8	)		(3.1	)		(5.3	)		(5.7	)
IPO and Public market readiness costs		(81.2	)		(0.1	)		(91.1	)		(0.1	)
Share-based compensation		(1.1	)		—			(1.1	)		—

Management adjustments		(85.1	)		(3.9	)		(102.8	)		(6.2	)
Other non-cash items		(2.0	)		(2.1	)		(5.5	)		(3.7	)
Depreciation and amortization		(40.1	)		(37.0	)		(78.3	)		(72.1	)
Other income (expense) - net		3.7			0.9			6.9			1.5
Interest expense and related financing costs - net		(52.9	)		(21.5	)		(123.7	)		(50.1	)
Income tax expense		(12.8	)		(18.1	)		(17.3	)		(30.1	)

Net income (loss)		(16.9	)		62.4			(25.9	)		97.4

Management adjustments include the following breakdowns, and are reviewed by the CODM:

•

Acquisition and divestment related gains and losses incurred in connection with planned and completed acquisitions, including legal and professional fees. Contingent consideration arrangements (earn-outs) relate to specific acquisitions.

•

Transaction costs include legal and professional fees related to legal reorganization, as well as adapting INNIO’s financing structure.

•

Transformation costs include costs in a given year incurred in relation to significant organizational change initiatives, including capacity expansion initiatives. This includes the ramp up of our business transformation efforts to support our capacity expansion initiatives to strengthen internal manufacturing and supply chain foundations, supported by dedicated third-party expertise to accelerate the capacity uplift. Costs also include those associated with streamlining management structures, processes and operational performance.

•


• Long-term incentive program 2023		$61.5 million
• Costs related to financial statements in US GAAP		$20.8 million
• Advisory fees		$4.1 million
• Others		$3.7 million
• Legal fees		$1.0 million

•

Share-based compensation represents RSUs awarded under the 2026 Incentive Award Plan.

Assets by segment are not disclosed because such information is not regularly reviewed by the CODM in allocating resources or assessing segment performance.

- Definition

The entire disclosure for segment reporting.

+ References

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+ Details

Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Net income (loss)	$ (25.9)	$ 97.4
Adjustments to reconcile net income to cash from operating activities
Depreciation of property, plant, and equipment	33.6	26.7
Amortization of intangible assets	44.7	45.4
Accrued long-term incentive plan compensation	61.5	0.0
Foreign currency losses (gains)	33.7	(11.7)
Amortization of operating lease right-of-use assets	11.4	8.1
Other non-cash expense (income)	32.0	11.8
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
Accounts receivable	(33.7)	20.2
Inventories	(379.7)	(144.6)
Prepaid expenses	(58.8)	(4.1)
Accounts payable	205.3	19.3
Contract liabilities	594.5	100.5
Accrued liabilities	(7.3)	(38.1)
All other assets and liabilities	(67.7)	(40.3)
Net cash provided by operating activities	443.6	90.6
Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract]
Additions to property, plant, and equipment	(94.1)	(39.4)
Additions to intangible assets	(7.5)	(8.8)
All other investing activities	0.3	2.3
Net cash used for investing activities	(101.3)	(45.9)
Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract]
Repayment of loans and borrowings	(3.8)	(3.0)
Proceeds / (payments) from supplier finance programs, net	29.2	52.4
Payments for obligations from finance lease and sale-and-leaseback transactions	(1.7)	(2.2)
Proceeds from contribution from non controlling interest	3.3	0.0
Transaction costs related to new loans and refinancing of existing loans	(6.6)	0.0
All other financing activities	(2.9)	(1.9)
Net cash provided by financing activities	17.5	45.3
Effect of currency exchange rate changes on cash and cash equivalents	(9.4)	16.9
Increase in cash and cash equivalents	350.4	106.8
Cash and cash equivalents at the beginning of the period	689.5	378.5
Cash and cash equivalents at the end of the period	1,039.9	485.3
Supplemental disclosure of cash flows information
Cash paid during the period for interest	$ (91.9)	$ (73.2)

Contract assets and contract liabilities - Summary of Contract balances (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Current	$ 68.1	$ 58.8
Non-current	0.0	0.0
Total Contract assets	68.1	58.8
Current	970.1	546.2
Non-current	426.8	269.9
Total Contract liabilities	$ 1,396.9	$ 816.1

Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Currency translation reserve [Member]	Cash flow hedge reserve [Member]	Defined benefit plans reserve [Member]	Equity attributable to shareholders of INNIO N.V. [Member]	Non-controlling interests [Member]
Beginning Balance at Dec. 31, 2024	$ 762.7	$ 34.9	$ 827.0	$ (44.0)	$ (51.7)	$ (3.3)	$ (0.2)	$ 762.7	$ 0.0
Statement [Line Items]
Net income (loss)	97.4			97.5				97.5	(0.1)
Other comprehensive income (loss), net of tax	30.7				37.6	(7.5)	0.6	30.7
Contribution from non-controlling Interests									0.0
Ending Balance at Jun. 30, 2025	890.8	34.9	827.0	53.5	(14.1)	(10.8)	0.4	890.9	(0.1)
Beginning Balance at Mar. 31, 2025	807.0	34.9	827.0	(9.0)	(40.4)	(5.2)	(0.3)	807.0	0.0
Statement [Line Items]
Net income (loss)	62.4			62.5				62.5	(0.1)
Other comprehensive income (loss), net of tax	21.4				26.3	(5.6)	0.7	21.4
Contribution from non-controlling Interests	0.0								0.0
Ending Balance at Jun. 30, 2025	890.8	34.9	827.0	53.5	(14.1)	(10.8)	0.4	890.9	(0.1)
Beginning Balance at Dec. 31, 2025	228.1	34.9	103.2	100.3	(23.5)	(0.6)	3.5	217.8	10.3
Statement [Line Items]
Net income (loss)	(25.9)			(22.5)				(22.5)	(3.4)
Other comprehensive income (loss), net of tax	5.2				16.0	(9.5)	(1.0)	5.5	(0.3)
Contribution from Parent	7.3		7.3					7.3
Transactions with non-controlling interests	3.3								3.3
Share-based compensation expense	1.1		1.1					1.1
Ending Balance at Jun. 30, 2026	219.1	34.9	111.6	77.8	(7.5)	(10.1)	2.5	209.2	9.9
Beginning Balance at Mar. 31, 2026	236.2	34.9	110.5	93.1	(15.3)	(0.9)	2.1	224.4	11.8
Statement [Line Items]
Net income (loss)	(16.9)			(15.3)				(15.3)	(1.6)
Other comprehensive income (loss), net of tax	(1.2)				7.8	(9.2)	0.4	(1.0)	(0.2)
Transactions with non-controlling interests	(0.1)								(0.1)
Share-based compensation expense	1.1		1.1					1.1
Ending Balance at Jun. 30, 2026	$ 219.1	$ 34.9	$ 111.6	$ 77.8	$ (7.5)	$ (10.1)	$ 2.5	$ 209.2	$ 9.9

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity.

+ References

+ Details

Long-term debt - current and non-current - Summary of available facilities (Parenthetical) (Detail) $ in Millions	Jun. 30, 2026 USD ($)
Facility Undrawn [Member] \| Ancillary Facility ERSTE Bank [Member]
Debt Instrument [Line Items]
Temporary allocation to supplier finance program	$ 36.5

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Section 50
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 37: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 38: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Section 50
-Paragraph 1F
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 39: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 40: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Name Accounting Standards Codification
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-Paragraph 1I
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-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 41: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 42: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482900/835-30-50-1

+ Details

Consolidated Statements of Comprehensive Income / (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (16.9)	$ 62.4	$ (25.9)	$ 97.4
Other comprehensive income (loss), net of taxes:
Defined benefit plans	0.4	0.7	(1.0)	0.6
Currency translation adjustments	7.6	26.3	15.7	37.6
Cash flow hedges	(9.2)	(5.6)	(9.5)	(7.5)
Total other comprehensive income (loss), net of taxes	(1.2)	21.4	5.2	30.7
Comprehensive income (loss)	(18.1)	83.8	(20.7)	128.1
Less: comprehensive income (loss) attributable to the noncontrolling interests	(1.8)	(0.1)	(3.7)	(0.1)
Comprehensive income (loss) attributable to INNIO N.V. shareholders	$ (16.3)	$ 83.9	$ (17.0)	$ 128.2

Accumulated other comprehensive income (loss)

6 Months Ended

Jun. 30, 2026

Accumulated Other Comprehensive Income Loss [Abstract]

Accumulated other comprehensive income (loss)

Note 20. Accumulated other comprehensive income (loss)

Changes in the balances for each component of accumulated other comprehensive income (loss) were as follows:


	Three Months Ended June 30,
(in millions of $)	Currency translation reserve			Cash flow hedge reserve			Defined benefit plans reserve			Total
(in millions of $)	Currency translation reserve			Cash flow hedge reserve			Defined benefit plans reserve			Total
Balance as of April 1, 2025		(40.4	)		(5.2	)		(0.3	)		(45.9	)
Other comprehensive income (loss), net of taxes of $-, $1.5 and $(0.2)		26.3			(5.9	)		0.7			21.1
Reclass from AOCI, net of taxes of $-, $(0.1) and $0.0		—			0.3			0.0			0.3

Balance as of June 30, 2025		(14.1	)		(10.8	)		0.4			(24.5	)
Balance as of April 1, 2026		(15.3	)		(0.9	)		2.1			(14.1	)
Other comprehensive income (loss), net of taxes of $-, $1.8 and $0.3		7.8			(7.9	)		0.4			0.3
Reclass from AOCI, net of taxes of $-, $(0.2) and $0.0		—			(1.3	)		0.0			(1.3	)

Balance as of June 30, 2026		(7.5	)		(10.1	)		2.5			(15.1	)


	Six Months Ended June 30,
(in millions of $)	Currency translation reserve			Cash flow hedge reserve			Defined benefit plans reserve			Total
(in millions of $)	Currency translation reserve			Cash flow hedge reserve			Defined benefit plans reserve			Total
Balance as of January 1, 2025		(51.7	)		(3.3	)		(0.2	)		(55.2	)
Other comprehensive income (loss), net of taxes of $-, $1.9 and $(0.3)		37.6			(7.5	)		0.6			30.7
Reclass from AOCI, net of taxes of $-, $0.0 and $0.0		—			0.0			0.0			0.0

Balance as of June 30, 2025		(14.1	)		(10.8	)		0.4			(24.5	)
Balance as of January 1, 2026		(23.5	)		(0.6	)		3.5			(20.6	)
Other comprehensive income (loss), net of taxes of $-, $2.1 and $0.9		16.0			(7.2	)		(1.0	)		7.8
Reclass from AOCI, net of taxes of $-, $(0.4) and $0.0		—			(2.3	)		0.0			(2.3	)

Balance as of June 30, 2026		(7.5	)		(10.1	)		2.5			(15.1	)

Accrued liabilities

6 Months Ended

Jun. 30, 2026

Accrued Liabilities [Abstract]

Accrued liabilities

Note 18. Accrued liabilities

Accrued liabilities are comprised of the following:


(in millions of $)	June 30, 2026		December 31, 2025
Personnel accruals		134.0		89.0
Accrual for outstanding invoices		54.6		48.4
Accrued interest		19.1		30.5
Accrued freight expenses		13.3		9.3
Accruals for professional fees		9.3		4.8
Other accruals		5.1		4.1

Accrued l iabilities		235.4		186.1

Employee benefits	6 Months Ended
Employee benefits	Jun. 30, 2026
Retirement Benefits [Abstract]
Employee benefits	Note 10. Employee benefits The Company operates defined benefit plans in Austria and in certain other jurisdictions. Defined Benefit Plans As of June 30, 2026 and December 31, 2025, the net defined benefit liability was $31.1 million and $31.6 million , respectively, and is included within employee benefits in Note 19 – Other liabilities. The net liability from defined benefit plans is recorded in Other liabilities in the consolidated statements of financial position. The Company expects to make the following benefit payments under its defined benefit plans in Austria for the next five fiscal years and in aggregate for the five fiscal years afterwards: approximately $ 0.8 million in 2026, $0.7 million in 2027, $1.3 million in 2028, $1.6 million in 2029, $3.3 million in 2030, and $14.0 million in the period 2031 through 2035. Defined Contribution Plans The Company operates defined contribution plans in Austria, in the United States and in certain other jurisdictions. The cost incurred related to the Company’s defined contribution plans i n A u s t r i a amounted to $11.6 million and $10.1 million for the three months ended June 30, 2026 and 2025, and $23.5 million and $19.9 million for the six months ended June 30, 2026 and 2025, respectively. The cost incurred related to the Company’s defined contribution plans in the United States amounted to $3.3 million and $2.5 million for the three months ended June 30, 2026 and 2025, and $4.3 million and $3.3 million for the six months ended June 30, 2026 and 2025, respectively.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (o)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (p)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480266/715-60-50-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480126/715-20-S99-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480794/715-70-50-1

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(03)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/715/tableOfContent

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (r)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (r)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

Other liabilities

6 Months Ended

Jun. 30, 2026

Other Liabilities Disclosure [Abstract]

Other liabilities

Note 19. Other liabilities

Other liabilities are comprised of the following:


(in millions of $)	June 30, 2026		December 31, 2025
Consideration payable		51.3		50.4
Non-income based tax liabilities		19.7		17.4
Provisions		24.3		23.3
Current portion of operating lease liability		21.0		18.4
Income tax liabilities		11.9		15.0
Current portion of long term debt—net		11.6		11.4
Derivative instruments		25.6		0.3
Other		29.1		17.5

Other current liabilities		194.5		153.7
Non-current portion of operating lease liability		60.3		50.9
Employee benefits		44.3		47.5
Provisions		36.7		40.1
Derivative instruments		11.5		7.6
Other		23.0		20.6

Other non-current liabilities		175.8		166.7

Interest expense related to the failed sale and leaseback liabilities amounted to $

4.7

million for the six months ended June 30, 2025. The Company settled all its outstanding failed sale and leaseback liabilities in the second

half

of 2025.

Other liabilities - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2025 USD ($)
Other Liabilities Disclosure [Abstract]
Interest expense related to failed sale and leaseback liabilities	$ 4.7

Condensed Consolidated Balance Sheets (Parenthetical)

Jun. 30, 2026

€ / shares

Statement [Line Items]

Common Stock, Shares, Issued

750,000,000

^[1]

Common Stock, Shares, Outstanding

750,000,000

^[1]

Number Of Authorized Shares Not Disclosed

true

Common Stock [Member]

Statement [Line Items]

Common Stock, Par or Stated Value Per Share | € / shares

€ 0.04

^[1]

[1]	The nominal value, shares issued and outstanding and additional paid-in capital have been adjusted for the 2025 balance. Refer to Note 22 for more information.

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Warranty provisions - Summary of Warranty provisions (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Beginning Balance	$ 60.8	$ 55.1
Current year provisions	14.0	11.1
Expenditure	(9.5)	(8.8)
Other changes	(5.9)	2.7
Ending Balance	59.4	60.1
current	23.0	19.1
non-current	$ 36.4	$ 41.0

Inventories - Schedule of Inventory Current (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Inventory Disclosure [Abstract]
Finished goods	$ 244.0	$ 212.0
Raw materials and supplies	302.1	171.9
Work in process	282.3	188.5
Goods in transit	108.5	8.5
Unbilled shipments	21.2	20.3
Total inventories	$ 958.1	$ 601.2

Related party transactions	6 Months Ended
Related party transactions	Jun. 30, 2026
Related Party Transactions [Abstract]
Related party transactions	Note 25. Related party transactions The Company enters into transactions with related parties, including affiliates and entities under common control, in the ordinary course of business. Nordic LuxCo / Heaten Group On March 30, 2026, the Company received a 24.9% equity interest in Nordic LuxCo as a non-cash capital contribution of $7.3 million from its parent, Al Alpine (Luxembourg) S.à.r.l. Nordic LuxCo is the parent entity of the Heaten Group, a developer of high-temperature industrial heat pump technology. The contribution was accounted for as a transaction between entities under common control. The Company accounts for its investment in Nordic LuxCo under the equity method of accounting. See Note 26 – Variable interest entities for information regarding the Company’s assessment of Nordic LuxCo under the variable interest entity model. The most significant ongoing related party activity relates to agreements with Heaten Germany GmbH, a subsidiary of Nordic LuxCo and an affiliate of the Company through its parent. Under these agreements, the Company provides engineering and support services and manufactures high-temperature heat pumps to Heaten specifications. Pricing is determined on a cost-plus basis based on the Company’s internal cost structures. For the three and six months ended June 30, 2026, the Company recognized $1.3 million and $2.7 million of revenues under these arrangements, respectively, out of which $0.9 million were outstanding as of June 30, 2026.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

+ Details

Long-term debt - current and non-current - Summary of available facilities (Detail) € in Millions, $ in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2026 EUR (€)	Jun. 30, 2026 CAD ($)	Feb. 16, 2026 USD ($)	Feb. 16, 2026 EUR (€)
Debt Instrument [Line Items]
Nominal Amount				$ 1,339.5	€ 1,100.0
Facility Drawn [Member] \| EUR \| Term Loan B [Member]
Debt Instrument [Line Items]
Nominal Amount		€ 1,100.0
Rate /Margin	2.00%	2.00%	2.00%
Maturity	Nov. 02, 2031
Facility Drawn [Member] \| EUR \| Floor Rate/Margin [Member] \| Term Loan B [Member]
Debt Instrument [Line Items]
Rate /Margin	0.00%	0.00%	0.00%
Facility Drawn [Member] \| USD \| Term Loan B [Member]
Debt Instrument [Line Items]
Nominal Amount \| $	$ 1,339.5
Rate /Margin	1.75%	1.75%	1.75%
Maturity	Nov. 02, 2031
Facility Drawn [Member] \| USD \| Floor Rate/Margin [Member] \| Term Loan B [Member]
Debt Instrument [Line Items]
Rate /Margin	0.00%	0.00%	0.00%
Facility Drawn [Member] \| CAD \| Term Facility [Member]
Debt Instrument [Line Items]
Nominal Amount \| $			$ 49.0
Rate /Margin	1.36%	1.36%	1.36%
Maturity	Sep. 25, 2030
Facility Undrawn [Member] \| EUR \| Revolving Credit Facility (RCF) [Member]
Debt Instrument [Line Items]
Nominal Amount		€ 210.0
Rate /Margin	2.00%	2.00%	2.00%
Maturity	May 02, 2031
Facility Undrawn [Member] \| EUR \| Ancillary Facility – ERSTE Bank [Member]
Debt Instrument [Line Items]
Nominal Amount		€ 40.0
Rate /Margin	2.50%	2.50%	2.50%
Maturity	Jul. 31, 2027
Facility Undrawn [Member] \| EUR \| Ancillary Facility – HELABA [Member]
Debt Instrument [Line Items]
Nominal Amount		€ 50.0
Rate /Margin	2.00%	2.00%	2.00%
Maturity	May 02, 2031

Segment reporting - Summary of Sub-Unit Information by Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Total revenue	$ 937.7	$ 659.5	$ 1,606.5	$ 1,153.5
Reportable Segment [Member]
Segment Reporting [Line Items]
Total revenue	937.7	659.5	1,606.5	1,153.5
Equipment revenue [Member]
Segment Reporting [Line Items]
Total revenue	569.3	354.1	891.8	564.3
Equipment revenue [Member] \| Reportable Segment [Member]
Segment Reporting [Line Items]
Total revenue	569.3	354.1	891.8	564.3
Equipment revenue [Member] \| Reportable Segment [Member] \| Data Center [Member]
Segment Reporting [Line Items]
Total revenue	232.4	118.0	339.4	170.3
Equipment revenue [Member] \| Reportable Segment [Member] \| Power Solutions [Member]
Segment Reporting [Line Items]
Total revenue	273.6	181.5	441.7	295.8
Equipment revenue [Member] \| Reportable Segment [Member] \| Compression [Member]
Segment Reporting [Line Items]
Total revenue	63.3	54.6	110.7	98.2
Total service revenue
Segment Reporting [Line Items]
Total revenue	368.4	305.4	714.7	589.2
Total service revenue \| Reportable Segment [Member]
Segment Reporting [Line Items]
Total revenue	368.4	305.4	714.7	589.2
Total service revenue \| Reportable Segment [Member] \| Transactional [Member]
Segment Reporting [Line Items]
Total revenue	236.1	192.8	442.3	364.8
Total service revenue \| Reportable Segment [Member] \| Contractual [Member]
Segment Reporting [Line Items]
Total revenue	$ 132.3	$ 112.6	$ 272.4	$ 224.4

Variable interest entities - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Variable Interest Entity [Line Items]
Long-term debt	$ 2,618.7	$ 2,658.8
Equity method investments	$ 6.6	$ 0.0
Welland, Canada Production Facility [Member]
Variable Interest Entity [Line Items]
Variable interest entity, qualitative or quantitative information, nature of vie	The Company holds an investment in a variable interest entity (“Welland VIE”) that was created in the third quarter of 2025 together with a group of investors to acquire, own, and lease land and buildings used in the Company’s production operations in Welland, Canada. The Welland VIE is financed through a combination of equity contributions from investors and third-party debt.
Variable interest entity, methodology for determining whether entity is primary beneficiary	The Company’s variable interests in the Welland VIE consist of its equity investment and a lease arrangement for the production facility in Welland, Canada. The Company determined that it is the primary beneficiary of the Welland VIE because it has (i) the power to direct the activities that most significantly impact the Welland VIE’s economic performance and (ii) the obligation to absorb losses and the right to receive benefits that could potentially be significant to the Welland VIE. Accordingly, the Company consolidates the Welland VIE.
Long-term debt	$ 33.7
Nordic LuxCo [Member]
Variable Interest Entity [Line Items]
Variable interest entity, qualitative or quantitative information, nature of vie	The Company holds a 24.9% equity interest in Nordic LuxCo, which was acquired through a non-cash capital contribution from its parent on March 30, 2026. See Note 25 – Related party transactions for a description of the related-party service and manufacturing agreements with Heaten Germany GmbH, a subsidiary of Nordic LuxCo.
Variable interest entity, methodology for determining whether entity is primary beneficiary	The Company has determined that it is not the primary beneficiary of Nordic LuxCo because it does not have the power to direct the activities that most significantly impact Nordic LuxCo’s economic performance, which are governed by Nordic LuxCo’s board of directors and its majority shareholder. Accordingly, Nordic LuxCo is not consolidated by the Company and the Company accounts for its interest under the equity method of accounting.
Variable interest entity, qualitative or quantitative information, ownership percentage	24.90%
Equity method investments	$ 6.6
Variable interest entity, reporting entity involvement, maximum loss exposure, amount	$ 7.4

- Definition

+ References + Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

+ Details

Leases - Summary of Lease Cost (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Lease, Cost [Abstract]
Operating lease expense	$ 7.1	$ 5.1	$ 13.5	$ 9.5
Short term lease expense	0.6	0.1	0.7	0.2
Finance leases—amortization	1.0	0.3	1.8	0.6
Finance leases—interest	0.3	0.2	0.6	0.3
Total lease expense	$ 9.0	$ 5.7	$ 16.6	$ 10.6

Accounts receivable - net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Receivables [Abstract]
Other Receivables	$ 5.3		$ 5.3		$ 5.5
Write-offs, net	0.4	$ 0.2	0.5	$ 0.3
Derecognized Accounts Receivable	180.4		180.4		175.2
Proceeds from Sale of Notes Receivable			179.5		$ 173.6
Proceeds from Sale of Other Receivables	$ 0.5	$ 0.3	$ 0.9	$ 0.7

Earnings (loss) per share - Summary of securities are excluded from the calculation of weighted average diluted common shares (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,702,100	0	1,702,100	0
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1,702,100	0	1,702,100	0

Accumulated other comprehensive income (loss) (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Accumulated Other Comprehensive Income Loss [Abstract]
OCI, Foreign Currency Transaction and Translation Gain (Loss), Arising During Period, Tax	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	1.8	1.5	2.1	1.9
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	0.3	(0.2)	0.9	(0.3)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(0.2)	(0.1)	(0.4)	0.0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	$ 0.0	$ 0.0	$ 0.0	$ 0.0

Prepaid expenses

6 Months Ended

Jun. 30, 2026

Prepaid Expense and Other Assets [Abstract]

Prepaid expenses

Note 13. Prepaid expenses

Prepaid expenses are comprised of the following;


(in millions of $)	June 30, 2026		December 31, 2025
Advance payments to suppliers		154.0		99.2
Prepaid expenses, easements & rights of way		19.9		17.9
Other prepaid expenses		1.3		0.8

Total Prepaid expenses		175.2		117.9

The Company made advanced payments to suppliers to secure materials and to address other operational requirements.