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 |
|---|---|---|---|
| SD | Specialized disclosure (conflict minerals) | Sep 23, 2026 | — |
| UPLOAD | Letter from the SEC | Mar 12, 2026 | — |
| IRANNOTICE | Filing | Mar 3, 2026 | — |
| NT 10-K | Filing | Mar 3, 2026 | Mar 3, 2026 |
| CORRESP | Letter to the SEC | Mar 2, 2026 | — |
| UPLOAD | Letter from the SEC | Mar 2, 2026 | — |
| CORRESP | Letter to the SEC | Feb 17, 2026 | — |
| UPLOAD | Letter from the SEC | Jan 14, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | Sep 25, 2025 | — |
| IRANNOTICE | Filing | Aug 7, 2025 | — |
| CORRESP | Letter to the SEC | Aug 6, 2025 | — |
| UPLOAD | Letter from the SEC | Jul 23, 2025 | — |
| CORRESP | Letter to the SEC | Jun 3, 2025 | — |
| UPLOAD | Letter from the SEC | May 19, 2025 | — |
| IRANNOTICE | Filing | May 8, 2025 | — |
| CORRESP | Letter to the SEC | Apr 25, 2025 | — |
| CORRESP | Letter to the SEC | Apr 17, 2025 | — |
| CORRESP | Letter to the SEC | Mar 20, 2025 | — |
| UPLOAD | Letter from the SEC | Mar 14, 2025 | — |
| IRANNOTICE | Filing | Mar 4, 2025 | — |
| CORRESP | Letter to the SEC | Feb 24, 2025 | — |
| UPLOAD | Letter from the SEC | Feb 10, 2025 | — |
| CORRESP | Letter to the SEC | Jan 17, 2025 | — |
| CORRESP | Letter to the SEC | Dec 23, 2024 | — |
| UPLOAD | Letter from the SEC | Dec 18, 2024 | — |
| IRANNOTICE | Filing | Nov 4, 2024 | — |
| SD | Specialized disclosure (conflict minerals) | Sep 27, 2024 | — |
| IRANNOTICE | Filing | Aug 8, 2024 | — |
| IRANNOTICE | Filing | May 1, 2024 | — |
| IRANNOTICE | Filing | Mar 15, 2024 | — |
| IRANNOTICE | Filing | Nov 8, 2023 | — |
| IRANNOTICE | Filing | Aug 9, 2023 | — |
| EFFECT | Filing | Jun 9, 2023 | — |
| CORRESP | Letter to the SEC | Jun 8, 2023 | — |
| CORRESP | Letter to the SEC | May 15, 2023 | — |
| IRANNOTICE | Filing | May 9, 2023 | — |
| UPLOAD | Letter from the SEC | Mar 23, 2023 | — |
| IRANNOTICE | Filing | Feb 27, 2023 | — |
| POSASR | Filing | Feb 14, 2023 | — |
| IRANNOTICE | Filing | Nov 7, 2022 | — |
| IRANNOTICE | Filing | Aug 9, 2022 | — |
| IRANNOTICE | Filing | May 2, 2022 | — |
| IRANNOTICE | Filing | Feb 25, 2022 | — |
| IRANNOTICE | Filing | Nov 5, 2021 | — |
| IRANNOTICE | Filing | Aug 5, 2021 | — |
| IRANNOTICE | Filing | May 7, 2021 | — |
| IRANNOTICE | Filing | Mar 4, 2021 | — |
| IRANNOTICE | Filing | Nov 5, 2020 | — |
| IRANNOTICE | Filing | Aug 6, 2020 | — |
| IRANNOTICE | Filing | May 4, 2020 | — |
| IRANNOTICE | Filing | Feb 27, 2020 | — |
| IRANNOTICE | Filing | Nov 8, 2019 | — |
| IRANNOTICE | Irannotice q2 2019 | Aug 8, 2019 | — |
| EFFECT | Filing | May 9, 2019 | — |
| IRANNOTICE | Irannotice q1 2019 | May 8, 2019 | — |
| CORRESP | Letter to the SEC | May 8, 2019 | — |
| UPLOAD | Letter from the SEC | Mar 7, 2019 | — |
| IRANNOTICE | Irannotice - q4 2018 | Feb 28, 2019 | — |
| POSASR | Posasr - 2019 amendment no. 1 | Feb 14, 2019 | — |
| IRANNOTICE | Irannotice - q3 2018 | Nov 2, 2018 | — |
| IRANNOTICE | Iran notice - q2 2018 | Aug 8, 2018 | — |
| IRANNOTICE | Filing | May 4, 2018 | — |
| IRANNOTICE | 2017 irannotice | Feb 28, 2018 | — |
| IRANNOTICE | Filing | Nov 8, 2017 | — |
| IRANNOTICE | Irannotice - 2017 q2 | Aug 9, 2017 | — |
| IRANNOTICE | Irannotice - q1 2017 | May 9, 2017 | — |
| IRANNOTICE | Irannotice - 2016 form 10-k | Mar 14, 2017 | — |
| RW | Request for withdrawal of registration statement | Mar 8, 2017 | — |
| UPLOAD | Letter from the SEC | Oct 25, 2016 | — |
| CORRESP | Letter to the SEC | Oct 12, 2016 | — |
| UPLOAD | Letter from the SEC | Oct 3, 2016 | — |
| IRANNOTICE | Filing | Aug 5, 2016 | — |
| IRANNOTICE | Irannotice - q1 2016 | May 6, 2016 | — |
| EFFECT | Filing | May 5, 2016 | — |
| CORRESP | Letter to the SEC | May 2, 2016 | — |
| CORRESP | Letter to the SEC | Mar 23, 2016 | — |
| IRANNOTICE | Irannotice - 2015 10-k | Mar 7, 2016 | — |
| AW | Aw - amendment withdrawal | Mar 4, 2016 | — |
| POSASR | Post-effective amendment to an automatic shelf registration statement | Feb 16, 2016 | — |
| IRANNOTICE | Filing | Aug 7, 2015 | — |
| CT ORDER | Filing | Jun 1, 2015 | — |
| IRANNOTICE | Filing | May 1, 2015 | — |
| IRANNOTICE | Filing | Mar 2, 2015 | — |
| UPLOAD | Letter from the SEC | Jan 5, 2015 | — |
| CORRESP | Letter to the SEC | Dec 2, 2014 | — |
| UPLOAD | Letter from the SEC | Nov 17, 2014 | — |
| IRANNOTICE | Filing | Nov 5, 2014 | — |
| CORRESP | Letter to the SEC | Oct 31, 2014 | — |
| UPLOAD | Letter from the SEC | Oct 20, 2014 | — |
| IRANNOTICE | Filing | May 9, 2014 | — |
| IRANNOTICE | Filing | Mar 14, 2014 | — |
| UPLOAD | Letter from the SEC | Dec 3, 2013 | — |
| CORRESP | Letter to the SEC | Nov 18, 2013 | — |
| IRANNOTICE | Filing | Nov 12, 2013 | — |
| UPLOAD | Letter from the SEC | Nov 4, 2013 | — |
| UPLOAD | Letter from the SEC | Oct 29, 2013 | — |
| CORRESP | Letter to the SEC | Oct 11, 2013 | — |
| UPLOAD | Letter from the SEC | Sep 27, 2013 | — |
| IRANNOTICE | Filing | Aug 9, 2013 | — |
| IRANNOTICE | Filing | May 10, 2013 | — |
| IRANNOTICE | Filing | Mar 18, 2013 | — |
| UPLOAD | Letter from the SEC | Aug 21, 2012 | — |
| CORRESP | Letter to the SEC | Aug 15, 2012 | — |
| UPLOAD | Letter from the SEC | Aug 1, 2012 | — |
| UPLOAD | Letter from the SEC | Sep 29, 2011 | — |
| CORRESP | Letter to the SEC | Jul 21, 2011 | — |
| UPLOAD | Letter from the SEC | Jul 7, 2011 | — |
| UPLOAD | Letter from the SEC | Mar 8, 2011 | — |
| 15-15D | Filing | Jan 27, 2011 | — |
| 15-15D | Filing | Jan 27, 2011 | — |
| CORRESP | Letter to the SEC | Jan 7, 2011 | — |
| UPLOAD | Letter from the SEC | Dec 30, 2010 | — |
| 11-K | Employee savings plan report | Jun 29, 2010 | Dec 31, 2009 |
| 11-K | Employee savings plan report | Jun 29, 2010 | Dec 31, 2009 |
Showing 114 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.