0001968582-23-000851.txt : 20231226 0001968582-23-000851.hdr.sgml : 20231226 20231226160804 ACCESSION NUMBER: 0001968582-23-000851 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20231226 DATE AS OF CHANGE: 20231226 SUBJECT COMPANY: 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: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-34474 FILM NUMBER: 231513408 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 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Gary Jesse E CENTRAL INDEX KEY: 0001568817 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 2511 GARDEN ROAD STREET 2: BUILDING A, SUITE 200 CITY: MONTEREY STATE: CA ZIP: 93940 144 1 primary_doc.xml 144 0001568817 XXXXXXXX LIVE 0000949157 Century Aluminum Company 001-34474 One South Wacker Drive, Suite 1000 Chicago IL 60093 312-696-3101 Jesse E. Gary Affiliate Common Stock J.P. Morgan Securities LLC

390 Madison Avenue - 6th Floor New York NY 10017

138162 1727025 92404663 12/26/2023 NASDAQ Common Stock 12/31/2020 Compensation Issuer N 31830 12/31/2020 N/A Common Stock 07/01/2023 Compensation Issuer N 26324 07/01/2023 N/A Common Stock 12/31/2022 Compensation Issuer N 80008 12/31/2022 N/A Y The shares filed today will be sold by the Jesse E. Gary Revocable Trust, Jesse E. Gary as Trustee 12/26/2023 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Jesse E. Gary