Century Aluminum Co.

CENX·NASDAQ·$66.88Share Price as of 11/2·$7BMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/06/26 10-QQ1 ended 03/31/2605/07/26 10-KFY 202503/03/26 10-QQ3 ended 09/30/2511/06/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report08/06/26 8-KCurrent report06/17/26 8-KCurrent report05/07/26 8-KCurrent report03/03/26 8-KCurrent report02/19/26

Prospectuses and Registrations

S-8Registration of securities for employees06/16/25 S-3/AShelf registration (amended)05/12/23 S-3Shelf registration03/17/23 POSASRProspectus / registration02/14/23 S-3ASRAutomatic shelf registration05/20/22

Proxies

DEF 14ADefinitive proxy04/24/26 DEFA14AAdditional proxy materials04/24/26 DEFA14AAdditional proxy materials06/09/25 DEF 14ADefinitive proxy04/25/25 DEFA14AAdditional proxy materials04/25/25

Ownership

SC 13GBeneficial ownership08/07/26 Form 4Insider transaction06/17/26 Form 4Insider transaction06/17/26 Form 4Insider transaction06/17/26 Form 4Insider transaction06/17/26

Other

SDConflict Minerals disclosure09/23/26 UPLOADLetter from the SEC03/12/26 IRANNOTICEIran disclosure03/03/26 NT 10-KLate filing notification (10-K)03/03/26 CORRESPCorrespondence with the SEC03/02/26