Business Combinations, Acquisitions, and Business Disposals (Tables)

12 Months Ended

Dec. 31, 2025

Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]

Schedule of Fair Value of Net Assets Acquired

The following table summarizes the total business enterprise value, comprised of the fair value of net assets acquired for the current year acquisitions (in millions):

	Certrec		Paragon
Date of acquisition	July 31, 2025		December 1, 2025
Segment	Nuclear & Safety		Nuclear & Safety
Goodwill (1)	$	55.7	$	343.7
Amortizable intangible assets:
Developed technology (2)	19.9		52.1
Customer relationships (3)	8.6		171.3
Trade names (4)	1.4		12.6
Leasehold improvements (5)	—		2.0
Backlog (6)	—		12.5
Total amortizable intangible assets	$	29.9	$	250.5
Tangible assets and liabilities:
Cash	$	2.3	$	4.6
Restricted cash—current	—		2.5
Accounts receivable, net	0.7		14.3
Costs in excess of billings	—		12.4
Inventories	—		16.3
Prepaid expenses and other currents assets	0.1		2.3
Property, plant, and equipment, net	—		1.4
Other assets	0.8		2.3
Accounts payable	(0.3)		(6.9)
Deferred contract revenue	(4.2)		(11.0)
Accrued expenses and other current liabilities	(1.6)		(9.9)
Deferred income taxes, non-current	—		(32.9)
Other liabilities, non-current	(0.5)		(1.2)
Net tangible assets acquired	$	(2.7)	$	(5.8)
Purchase consideration	$	82.9	$	588.4
Less: cash and restricted cash acquired	2.3		7.1
GAAP purchase consideration, net of cash acquired	$	80.6	$	581.3
Acquiree revenue post acquisition through the period ended December 31, 2025	$	6.1	$	9.0
Acquiree loss from operations post acquisition through the period ended December 31, 2025	$	(0.4)	$	(1.8)

(1)The goodwill of $55.7 million and $343.7 million, respectively, represents the excess of the gross consideration transferred over the fair value of the underlying net tangible and identifiable intangible assets acquired and liabilities assumed and is attributable to the acquired assembled workforce and expected revenue and cost synergies. A portion of the goodwill recognized is expected to be deductible for income tax purposes. The purchase price allocation has not been finalized. We expect to finalize the valuation report and complete the purchase price allocation no later than one-year from the acquisition date.

(2)The useful life for developed technology ranges from 5-15 years.

(3)The useful life for customer relationships is 10 years.

(4)The useful life for trade names is 10 years.

(5)The useful life for leasehold improvements is 2.7 years.

(6)The useful life for backlog is 3 years.

Schedule of Business Acquisition, Pro Forma Information

The following unaudited pro forma financial information presents the Company's results of operations for the years ended December 31, 2025 and December 31, 2024 to illustrate the estimated effects of the acquisitions of Certrec and Paragon as if they had occurred on January 1, 2024. The pro forma financial information is presented for comparative purposes only and is not necessarily indicative of the Company's operating results that may have actually occurred had the acquisitions been completed on January 1, 2024. The unaudited pro forma financial information does not reflect the expected realization of any anticipated cost savings, operating efficiencies, or other synergies that may have been associated with the acquisitions.

(amounts in millions)	Fiscal Year Ended December 31, 2025		Fiscal Year Ended December 31, 2024
Total revenues	$	1,043.2	$	974.0
Net income (loss)	$	29.0	$	(61.2)
Net income (loss) attributable to Mirion Technologies, Inc. stockholders	$	28.0	$	(60.7)