Company: CENX
Filing Date: 2025-04-25
Form Type: DEF 14A
Source: 0001552781-25-000153
Chunk: 95

Company: CENTURY ALUMINUM CO
Filing Date: 2025-04-25
Form: DEF 14A
Chunk 95
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 officer. CENTURY ALUMINUM COMPANY THE BOARD RECOMMENDS
A VOTE "FOR" EACH OF THE DIRECTOR NOMINEES AND "FOR" PROPOSALS 2, 3 AND 4. NOTE: By execution of this Proxy Card, the undersigned hereby
authorizes the proxies to vote, in their discretion, on any other business that may properly be brought before the meeting or any postponement
thereof. SCAN TO VIEW MATERIALS & VOTE w CENTURY ALUMINUM COMPANY 1 SOUTH WACKER DRIVE SUITE 1000 CHICAGO, IL 60606 VOTE BY INTERNET
- www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of
information. Vote by 11:59 p.m. Eastern Time on June 15, 2025 for shares held directly and by 11:59 p.m. Eastern Time on June 11, 2025
for shares held in a Plan. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records
and to create an electronic voting instruction form. VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting
instructions. Vote by 11:59 p.m. Eastern Time on June 15, 2025 for shares held directly and by 11:59 p.m. Eastern Time on June 11, 2025
for shares held in a Plan. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date
your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes
Way, Edgewood, NY 11717.

V73987-P27858 Important Notice Regarding the Availability of Proxy Materials for the 2025 Annual Meeting: Century's 2025 Proxy Statement
and Annual Report on Form 10-K and any amendments to the foregoing materials, are available at www.proxyvote.com. THIS PROXY IS SOLICITED
ON BEHALF OF THE BOARD OF DIRECTORS OF CENTURY ALUMINUM COMPANY ANNUAL MEETING OF STOCKHOLDERS JUNE 16, 2025 The stockholders hereby appoint
each of John DeZee and Paul Sharobeem as proxies, with the power to appoint each of their substitutes, and hereby