<SEC-DOCUMENT>0001628280-25-043249-index.html : 20250930
<SEC-HEADER>0001628280-25-043249.hdr.sgml : 20250930
<ACCEPTANCE-DATETIME>20250930162624
ACCESSION NUMBER:		0001628280-25-043249
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20250926
FILED AS OF DATE:		20250930
DATE AS OF CHANGE:		20250930

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hafberg Agust F
		CENTRAL INDEX KEY:			0002049924
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34474
		FILM NUMBER:		251360849

	MAIL ADDRESS:	
		STREET 1:		CENTURY ALUMINUM COMPANY
		STREET 2:		1 S. WACKER DRIVE, SUITE 1000
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

ISSUER:		

	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

	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>4
<SEQUENCE>1
<FILENAME>wk-form4_1759263981.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wk-form4_1759263981.html

Document 1 - RAW XML: wk-form4_1759263981.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa_section16xhafberg.htm
<DESCRIPTION>EX-24
<TEXT>
Document 2 - file: poa_section16xhafberg.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>poa_section16xhafberg001.jpg
<TEXT>
Document 3 - file: poa_section16xhafberg001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>poa_section16xhafberg002.jpg
<TEXT>
Document 4 - file: poa_section16xhafberg002.jpg

</DOCUMENT>
</SEC-DOCUMENT>