8.Goodwill and Other Intangible Assets
The changes in the net carrying value of goodwill by reportable segment for the years ended December 31, 2025 and 2024 are as follows:
Sealing
Technologies
Advanced
Surface Technologies
Total
 (in millions)
Goodwill as of December 31, 2023$276.2 $532.2 $808.4 
Foreign currency translation(9.2)— (9.2)
Acquisition97.0 — 97.0 
Goodwill as of December 31, 2024364.0 532.2 896.2 
Foreign currency translation10.5 — 10.5 
Acquisitions158.1— 158.1 
Goodwill as of December 31, 2025$532.6 $532.2 $1,064.8 

The goodwill balances reflected above are net of accumulated impairment losses of $27.8 million for the Sealing Technologies segment as of December 31, 2025, 2024 and 2023 and $126.0 million as of December 31, 2025, 2024 and 2023 for the Advanced Surface Technologies segment.
Identifiable intangible assets are as follows:
 As of December 31, 2025As of December 31, 2024
 Gross
Carrying
Amount
Accumulated
Amortization
Gross
Carrying
Amount
Accumulated
Amortization
 (in millions)
Amortized:
Customer relationships$568.7 $241.0 $493.6 $209.9 
Existing technology596.8 186.9 567.5 143.9 
Trademarks80.5 41.9 69.4 34.9 
Other18.3 15.9 26.6 22.9 
1,264.3 485.7 1,157.1 411.6 
Indefinite-Lived:
In-process research and development14.0 — 14.0 — 
Trademarks30.9 — 30.8 — 
Total$1,309.2 $485.7 $1,201.9 $411.6 

Amortization expense for the years ended December 31, 2025, 2024 and 2023 was $77.4 million, $75.9 million and $69.3 million, respectively.
The estimated amortization expense for definite-lived (amortized) intangible assets for the next five years is as follows (in millions):
2026$79.4 
2027$78.5 
2028$77.8 
2029$76.6 
2030$76.0 

Historical Timeline

Fiscal YearFiled
2025Feb 19, 2026Showing above
2024Feb 21, 2025
2023Feb 27, 2024
2022Mar 1, 2023
2021Mar 1, 2022
2020Mar 1, 2021
2019Mar 11, 2020
2018Feb 25, 2019
2017Feb 26, 2018
2016Feb 22, 2017
2015Feb 26, 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.