NOTE 9. GOODWILL AND INTANGIBLE ASSETS Changes in the carrying value of goodwill were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | Chlor Alkali Products and Vinyls | | Epoxy | | Winchester | | Total | | Goodwill | ($ in millions) | Balance at January 1, 2025(1) | $ | 1,276.4 | | | $ | 144.8 | | | $ | 2.4 | | | $ | 1,423.6 | | | Acquisition activity | — | | | — | | | 2.4 | | | 2.4 | | | Foreign currency translation adjustment | (0.1) | | | — | | | — | | | (0.1) | | Balance at September 30, 2025(1) | $ | 1,276.3 | | | $ | 144.8 | | | $ | 4.8 | | | $ | 1,425.9 | | | | | | | | | | Balance at January 1, 2026(1) | $ | 1,276.3 | | | $ | 144.8 | | | $ | 6.5 | | | $ | 1,427.6 | | | | | | | | | | | Foreign currency translation adjustment | — | | | — | | | — | | | — | | Balance at September 30, 2026(1) | $ | 1,276.3 | | | $ | 144.8 | | | $ | 6.5 | | | $ | 1,427.6 | |
(1)Includes cumulative goodwill impairment of $557.6 million and $142.2 million in Chlor Alkali Products and Vinyls and Epoxy, respectively. Intangible assets consisted of the following: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2026 | | December 31, 2025 | | September 30, 2025 | | Gross Amount | | Accumulated Amortization | | Net | | Gross Amount | | Accumulated Amortization | | Net | | Gross Amount | | Accumulated Amortization | | Net | | Intangible Assets | ($ in millions) | | Customers, customer contracts and relationships | $ | 521.1 | | | $ | (382.4) | | | $ | 138.7 | | | $ | 524.4 | | | $ | (358.4) | | | $ | 166.0 | | | $ | 677.2 | | | $ | (502.3) | | | $ | 174.9 | | | Trade names | 3.5 | | | (1.5) | | | 2.0 | | | 3.5 | | | (1.2) | | | 2.3 | | | 3.7 | | | (1.1) | | | 2.6 | | | Acquired technology | 11.3 | | | (9.8) | | | 1.5 | | | 11.3 | | | (9.4) | | | 1.9 | | | 96.6 | | | (94.5) | | | 2.1 | | | Other | 4.9 | | | (0.7) | | | 4.2 | | | 4.9 | | | (0.7) | | | 4.2 | | | 4.5 | | | (0.7) | | | 3.8 | | | Total intangible assets | $ | 540.8 | | | $ | (394.4) | | | $ | 146.4 | | | $ | 544.1 | | | $ | (369.7) | | | $ | 174.4 | | | $ | 782.0 | | | $ | (598.6) | | | $ | 183.4 | |
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