Century Aluminum Co SEC filings CENX

Century Aluminum Co has 1,002 filings in SEC EDGAR's recent list, going back to Mar 3, 2010. Its latest annual report, Form 10-K, was filed on Mar 3, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.

Form Description Filed Period
S-8 Employee stock plan registration Jun 16, 2025 —
S-3/A Filing May 12, 2023 —
S-3 Shelf registration Mar 17, 2023 —
S-3ASR Automatic shelf registration May 20, 2022 —
S-8 Employee stock plan registration Aug 9, 2019 —
S-3/A S-3/a pre-effective amendment May 7, 2019 —
S-3 Shelf registration Mar 1, 2019 —
S-3ASR Automatic shelf registration Jul 28, 2017 —
S-3 Shelf registration Mar 7, 2016 —
S-3/A S-3asr Feb 16, 2016 —
S-3ASR Automatic shelf registration Nov 7, 2014 —
S-8 POS Century aluminum of west virgnia, inc./united steelworkers of america savings pl Mar 25, 2011 —
S-8 POS Amendment no. 1 Dec 29, 2010 —
S-8 POS Amendment no. 1 Dec 29, 2010 —
S-8 POS Amendment no. 1 Dec 29, 2010 —

Showing 15 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.

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Company profile

Industry
Primary Production of Aluminum (SIC 3334)
Listed as
CENX (Nasdaq)
Fiscal year ends
December 31
Incorporated in
DE
Headquarters
Chicago, IL
SEC filer status
Large accelerated filer
SEC CIK
949157

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Source: SEC EDGAR filings. This is company-reported data, not investment advice.