Goodwill and Other Intangible Assets
The following table presents the changes in the carrying amount of goodwill (in millions):
Optical CommunicationsDisplaySpecialty MaterialsLife SciencesHemlock and Emerging Growth BusinessesTotal
Balance as of December 31, 2023$904 $119 $151 $607 $599 $2,380 
Acquired goodwill 11    11 
Foreign currency translation
   adjustment and other
(14)(9)(14)(1)10 (28)
Balance as of December 31, 2024$890 $121 $137 $606 $609 $2,363 
Acquired goodwill (1)
    98 98 
Foreign currency translation
   adjustment and other
17  28 
Balance as of December 31, 2025$907 $123 $137 $609 $713 $2,489 
(1)The Company acquired a U.S. solar module manufacturing facility. Refer to Note 3 (Acquisition) to the consolidated financial statements for additional information.
As of December 31, 2025 and 2024, Corning’s gross goodwill balance was $9.0 billion and $8.9 billion, respectively, and accumulated impairment losses were $6.5 billion. Accumulated impairment losses were generated primarily through goodwill impairments related to the Optical Communications segment.
Other Intangible Assets, Net
Other intangible assets, net consisted of the following (in millions):
 December 31,
 20252024
 GrossAccumulated amortizationNetGrossAccumulated amortizationNet
Amortized intangible assets:
Patents, trademarks & trade names$449 $319 $130 $407 $266 $141 
Customer lists and other (1)
1,4118845271,391780611
Other intangible assets, net$1,860 $1,203 $657 $1,798 $1,046 $752 
(1)Other consists of intangible assets related to developed technologies and intellectual know-how.
Corning’s amortized intangible assets are primarily related to Optical Communications, Life Sciences and certain businesses within Hemlock and Emerging Growth Businesses. The net carrying amount of intangible assets decreased during the year, primarily driven by amortization of $110 million.
Annual amortization expense is expected to be approximately $93 million, $92 million, $85 million, $73 million and $66 million for years 2026 through 2030, respectively.

Historical Timeline

Fiscal YearFiled
2025Feb 12, 2026Showing above
2024Feb 13, 2025
2023Feb 12, 2024
2022Feb 13, 2023
2021Feb 14, 2022
2020Feb 12, 2021
2019Feb 18, 2020
2018Feb 12, 2019
2017Feb 15, 2018
2016Feb 6, 2017
2015Feb 12, 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.