    <SEC-DOCUMENT>0000949157-24-000040-index.html : 20240418
    <SEC-HEADER>0000949157-24-000040.hdr.sgml : 20240418
    <ACCEPTANCE-DATETIME>20240418162833
    ACCESSION NUMBER:		0000949157-24-000040
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20240418
    DATE AS OF CHANGE:		20240418

    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
    		IRS NUMBER:				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:		24854630

    	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>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>a2024noticeofproxy.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: a2024noticeofproxy.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>centuryaluminumcompany_nax.jpg
    <TEXT>
    Document 2 - file: centuryaluminumcompany_nax.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>centuryaluminumcompany_naxa.jpg
    <TEXT>
    Document 3 - file: centuryaluminumcompany_naxa.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>