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GOODWILL AND OTHER INTANGIBLE ASSETS
 9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS
The following table summarizes changes in the carrying amount of goodwill during the nine months ended September 30, 2025.
In millionsSemiconductor TechnologiesInterconnect SolutionsTotal
Balance at December 31, 2024$4,453 $2,926 $7,379 
Currency translation adjustment91 27 118 
Balance at September 30, 2025
$4,544 $2,953 $7,497 

Qnity tests goodwill for impairment annually during the fourth quarter, or more frequently when events or changes in circumstances indicate that the fair value of a reporting unit is below its carrying value.

Effective in the first quarter of 2025, in anticipation of the Separation, DuPont realigned its segment structure. The realignment of DuPont’s segments served as a triggering event requiring the Company to perform an impairment analysis related to goodwill prior to and subsequent to the realignment. As part of the realignment, the Company assessed and redefined certain reporting units, including reallocation of goodwill on a relative fair value basis, as applicable, to the reporting units impacted. Goodwill impairment analyses were then performed for reporting units impacted and no impairments were identified. The fair value of each reporting unit tested was estimated using a combination of a discounted cash flow model and market approach, with both approaches receiving equal weighting. The Company’s significant assumptions in these analyses include, but are not limited to, projected revenue growth, EBITDA margin, weighted average cost of capital and terminal growth rate and EBITDA market multiples from comparable market transactions for the market approach.

Other Intangible Assets
The gross carrying amounts and accumulated amortization of other intangible assets with finite lives, by major class are as follows:
September 30, 2025December 31, 2024
In millionsGross Carrying AmountAccumulated AmortizationNetGross Carrying AmountAccumulated AmortizationNet
Other intangible assets:
  Developed technology$544 $(336)$208 $605 $(357)$248 
  Trademarks/tradenames55 (37)18 55 (34)21 
  Customer-related2,130 (1,196)934 2,353 (1,336)1,017 
Total other intangible assets$2,729 $(1,569)$1,160 $3,013 $(1,727)$1,286 

The following table provides the net carrying value of other intangible assets by segment:
Net Other Intangibles by SegmentSeptember 30, 2025December 31, 2024
In millions
Semiconductor Technologies$276 $314 
Interconnect Solutions884 972 
Total$1,160 $1,286 
Total estimated amortization expense for the remainder of 2025 and the five succeeding fiscal years is as follows:
Estimated Amortization Expense
In millions
Remainder of 2025$48 
2026$197 
2027$166 
2028$141 
2029$107 
2030$88