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 |
|---|---|---|---|
| DEFA14A | Additional proxy material | Apr 24, 2026 | — |
| DEF 14A | Proxy statement | Apr 24, 2026 | Jun 15, 2026 |
| DEFA14A | Additional proxy material | Jun 9, 2025 | — |
| DEFA14A | Additional proxy material | Apr 25, 2025 | — |
| DEF 14A | Proxy statement | Apr 25, 2025 | Jun 16, 2025 |
| DEFA14A | Additional proxy material | May 28, 2024 | — |
| DEFA14A | Additional proxy material | Apr 18, 2024 | — |
| DEF 14A | Proxy statement | Apr 18, 2024 | Jun 3, 2024 |
| DEFA14A | Additional proxy material | Apr 18, 2023 | — |
| DEF 14A | Proxy statement | Apr 18, 2023 | — |
| DEFA14A | Additional proxy material | Apr 29, 2022 | — |
| DEF 14A | Proxy statement | Apr 29, 2022 | Jun 13, 2022 |
| DEFA14A | Additional proxy material | May 17, 2021 | — |
| DEFA14A | Additional proxy material | Apr 22, 2021 | — |
| DEF 14A | Proxy statement | Apr 22, 2021 | Jun 14, 2021 |
| DEFA14A | Additional proxy material | May 22, 2020 | — |
| DEFA14A | Additional proxy material | Apr 22, 2020 | — |
| DEF 14A | Proxy statement | Apr 22, 2020 | Apr 22, 2020 |
| DEFA14A | Additional proxy material | Apr 22, 2019 | — |
| DEF 14A | Proxy statement | Apr 22, 2019 | Dec 31, 2018 |
| DEFA14A | Additional proxy material | Apr 27, 2018 | — |
| DEF 14A | Proxy statement | Apr 27, 2018 | Dec 31, 2017 |
| DEFA14A | Additional proxy material | Apr 24, 2017 | — |
| DEF 14A | Proxy statement | Apr 24, 2017 | Dec 31, 2016 |
| DEFA14A | Additional proxy material | Apr 29, 2016 | — |
| DEF 14A | Proxy statement | Apr 29, 2016 | Dec 31, 2015 |
| DEFA14A | Additional proxy material | Aug 24, 2015 | — |
| DEFA14A | Additional proxy material | Aug 12, 2015 | — |
| DEFA14A | Additional proxy material | Jul 13, 2015 | — |
| DEF 14A | Proxy statement | Jul 13, 2015 | Dec 31, 2014 |
| DEFA14A | Additional proxy material | Jul 18, 2014 | — |
| DEF 14A | Proxy statement | Jul 18, 2014 | Dec 31, 2013 |
| DEF 14A | Proxy statement | Jul 30, 2013 | Sep 23, 2013 |
| DEF 14A | Proxy statement | Aug 3, 2012 | Aug 3, 2012 |
| PRE 14A | Preliminary proxy statement | Jul 23, 2012 | Jul 23, 2012 |
| DEF 14A | Proxy statement | Apr 25, 2011 | Apr 25, 2011 |
| DEF 14A | Proxy statement | Apr 21, 2010 | Apr 21, 2010 |
Showing 37 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
Other Primary Production of Aluminum companies
- Alcoa Corp AA
- Aluminum Corp Of China Ltd ALMMF
Source: SEC EDGAR filings. This is company-reported data, not investment advice.