Company: CENX
Filing Date: 2025-06-09
Form Type: DEFA14A
Source: 0001104659-25-057845
Chunk: 2

Company: CENTURY ALUMINUM CO
Filing Date: 2025-06-09
Form: DEFA14A
Chunk 2
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% Kaiser Aluminum 2 $26,697 $17,198 64% -5.3% Koppers Holdings $26,933 $24,209 90% -2.9% Materion $23,360 $24,567 105% 11.4% Metallus $24,874 $37,558 151% 12.4% Minerals Tech $36,937 $38,264 104% 6.2% Mueller Industries $95,320 $192,839 202% 40.0% Radius Recycling $27,301 $29,615 108% -4.1% SunCoke Energy 2 $28,529 $36,588 128% 16.4% Valmont Industries 2 $36,040 $65,782 183% 16.6% Warrior Met Coal $31,109 $45,323 146% 23.6% Worthington Steel 3 $8,593 $9,239 108% 15.4% 75th Percentile $33,575 $55,671 192% 22.2% Median $27,301 $37,558 128% 15.4% 25th Percentile $24,315 $24,388 104% 4.7% Century 2 $35,067 $51,043 146% 24.8% % Rank 77% 69% 57% 87% Data Source: S&P's Capital IQ 1 TSR is for the period 12/31/19 - 12/31/24 2 Values exclude predecessor in years where there were two CEOs. 3 Data reflects fiscal year 2024 only (post- spin-off from Worthington Enterpises on 12/1/23), while TSR is from 12/31/23 to 12/31/24. 5-Yr TSR CAGR 1 Val. in $000s CEO

Additional Information to Support our Executive Pay Program 4 AIP CEO Pay • Financial goal - setting is challenging due to commodity price volatility outside of management’s control , we instead rely on FOS metrics (70%) and individual performance (30%), which are essential for measuring strategic achievement • Select goals (Energy Efficiency, Current Efficiency, and Amperage) and resulting performance are not disclosed due to the competitively sensitive nature of these FOS metrics, but are indexed for reference • Eight FOS metrics