    <SEC-DOCUMENT>0001104659-25-057845-index.html : 20250609
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    <ACCEPTANCE-DATETIME>20250609162436
    ACCESSION NUMBER:		0001104659-25-057845
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		7
    FILED AS OF DATE:		20250609
    DATE AS OF CHANGE:		20250609

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CENTURY ALUMINUM CO
    		CENTRAL INDEX KEY:			0000949157
    		STANDARD INDUSTRIAL CLASSIFICATION:	PRIMARY PRODUCTION OF ALUMINUM [3334]
    		ORGANIZATION NAME:           	04 Manufacturing
    		EIN:				133070826
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34474
    		FILM NUMBER:		251034429

    	BUSINESS ADDRESS:
    		STREET 1:		1 SOUTH WACKER DRIVE
    		STREET 2:		SUITE 1000
    		CITY:			CHICAGO
    		STATE:			IL
    		ZIP:			60606
    		BUSINESS PHONE:		3126963101

    	MAIL ADDRESS:
    		STREET 1:		1 SOUTH WACKER DRIVE
    		STREET 2:		SUITE 1000
    		CITY:			CHICAGO
    		STATE:			IL
    		ZIP:			60606
    </SEC-HEADER>
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    <SEQUENCE>1
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    <DESCRIPTION>DEFA14A
    <TEXT>
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    <TEXT>
    Document 2 - file: tm2517542d1_def14aimg001.jpg

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    <SEQUENCE>3
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: tm2517542d1_def14aimg002.jpg

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    <SEQUENCE>4
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: tm2517542d1_def14aimg003.jpg

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    <SEQUENCE>5
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    <TEXT>
    Document 5 - file: tm2517542d1_def14aimg004.jpg

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    <SEQUENCE>6
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: tm2517542d1_def14aimg005.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>tm2517542d1_def14aimg006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: tm2517542d1_def14aimg006.jpg

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