Company: CENX
Filing Date: 2025-03-03
Form Type: 10-K
Source: 0000949157-25-000024
Chunk: 145

Company: CENTURY ALUMINUM CO
Filing Date: 2025-03-03
Form: 10-K
Item: Item 8
Chunk 145
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ATED FINANCIAL STATEMENTS(amounts in millions, except share and per share amounts)

Other changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (pre-tax): Year Ended December 31, PensionOPEB 2024202320242023Net (gain) loss$8.4 $6.9 $0.3 $4.8 Net loss (gain) transferred due to acquisition— (4.5)— (0.2)Prior service cost (benefit)— 1.2 — — Amortization of net loss, including recognition due to settlement(5.8)(6.0)(0.7)(0.2)Amortization of prior service (cost) benefit, including curtailment(0.2)(0.1)— — Exchange rates(2.4)(1.1)— (0.1)Total amount recognized in other comprehensive income (loss)— (3.6)(0.4)4.3 Net periodic benefit cost8.9 9.4 4.8 4.1 Total recognized in net periodic benefit cost and other comprehensive income (loss)$8.9 $5.8 $4.4 $8.4 Weighted average assumptions used to determine benefit obligations at December 31:PensionOPEB2024202320242023Discount rate (1)5.99%5.19%5.62%5.19%Rate of compensation increase without Jamaica3.0%3.5%3.0%3.5%Rate of compensation increase Jamaica7.0%n/a7.0%n/aMeasurement date12/31/202412/31/202312/31/202412/31/2023Weighted average assumptions used to determine net periodic benefit cost for the years ended December 31: PensionOPEB 202420232022202420232022Measurement date12/31/202312/31/202212/31/202112/31/202312/31/202212/31/2021Fiscal year end12/31/202412/31/202312/31/202212/31/202412/31/202312/31/2022Discount rate (1)6.75%5.50%2.94%5.43%5.57%2.64%Rate of