11. GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill and in-process research and development assets resulting from business combinations are not subject to amortization. Other acquired intangible assets with finite lives are amortized over their expected useful lives on a straight-line basis, or if reliably determinable, based on the pattern in which the economic benefit of the asset is expected to be used. The Company expenses costs incurred to renew or extend the term of acquired intangible assets.

The changes in the carrying amount of goodwill, by segment, during the years ended December 31, 2025 and 2024 were as follows (in millions):
 United
States
EuropeRest of WorldTotal
Goodwill at December 31, 2023
$710.7 $58.2 $376.2 $1,145.1 
Goodwill acquired during the year (Note 10)
429.2 — 205.4 634.6 
Currency translation adjustment— (3.0)— (3.0)
Goodwill at December 31, 2024
1,139.9 55.2 581.6 1,776.7 
Adjustments to goodwill from acquisition (Note 10) (a)
(15.1)— — (15.1)
Currency translation adjustment— 7.0 — 7.0 
Goodwill at December 31, 2025
$1,124.8 $62.2 $581.6 $1,768.6 
______________________________________
(a) Includes measurement period adjustment related to Endotronix acquisition. For further information, see Note 10.

Other intangible assets consist of the following (in millions):
 December 31,
 Weighted-Average Useful Life (in years)20252024
 CostAccumulated
Amortization
Net
Carrying
Value
CostAccumulated
Amortization
Net
Carrying
Value
Finite-lived intangible assets      
Patents10.2$53.0 $(8.6)$44.4 $138.8 $(90.5)$48.3 
Developed technology14.4617.8 (44.5)573.3 665.2 (47.4)617.8 
Other0.00.5 (0.5)— 3.4 (3.4)— 
14.1671.3 (53.6)617.7 807.4 (141.3)666.1 
Indefinite-lived intangible assets      
In-process research and development510.5 — 510.5 510.5 — 510.5 
$1,181.8 $(53.6)$1,128.2 $1,317.9 $(141.3)$1,176.6 
In 2025, the Company recorded a $40.0 million impairment loss related to certain developed technology assets due to management’s determination that the assets are no longer expected to generate future economic benefit. The impairment was recognized in Intangible Assets Impairment Charges within operating income on the consolidated statement of operations. There were no intangible asset impairment charges recognized in 2024.

Amortization expense related to other intangible assets for the years ended December 31, 2025, 2024, and 2023 was $8.4 million, $5.6 million, and $2.2 million, respectively. Estimated amortization expense for each of the years ending December 31 is as follows (in millions):
2026$17.3 
202727.7 
202848.8 
202969.7 
203088.0 

Historical Timeline

Fiscal YearFiled
2025Feb 25, 2026Showing above
2024Feb 28, 2025
2023Feb 12, 2024
2022Feb 13, 2023
2021Feb 14, 2022
2020Feb 12, 2021
2019Feb 14, 2020
2018Feb 15, 2019
2017Feb 16, 2018
2016Feb 17, 2017
2015Feb 19, 2016

About Goodwill & Intangibles Disclosures

Goodwill and intangible asset disclosures reveal the premium paid in acquisitions and how management assesses whether that premium retains its value. Since goodwill is no longer amortized under US GAAP, the annual impairment test is the only mechanism that adjusts carrying values downward — making the assumptions behind that test critically important for investors.

Key signals: a history of goodwill impairments suggests management consistently overpays for acquisitions. Watch the gap between reporting unit fair value and carrying amount — when fair value exceeds carrying amount by less than 10-20%, a small decline in business performance could trigger a write-down. For finite-lived intangibles, examine useful life assumptions across customer relationships, technology, and trade names; aggressive estimates inflate near-term earnings. Compare total intangibles-to-total-assets ratios against peers to assess acquisition dependency. Rising goodwill as a percentage of equity can signal balance sheet fragility.