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 |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2026 | Nov 5, 2026 |
| SD | Specialized disclosure (conflict minerals) | Sep 23, 2026 | — |
| 10-Q | Quarterly report | Aug 6, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2026 | Aug 6, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 17, 2026 | Jun 15, 2026 |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| DEFA14A | Additional proxy material | Apr 24, 2026 | — |
| DEF 14A | Proxy statement | Apr 24, 2026 | Jun 15, 2026 |
| UPLOAD | Letter from the SEC | Mar 12, 2026 | — |
| IRANNOTICE | Filing | Mar 3, 2026 | — |
| 10-K | Annual report | Mar 3, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Restatement
|
Mar 3, 2026 | Mar 2, 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 | — |
| 8-K |
Current report
Results of operations
|
Feb 19, 2026 | Feb 19, 2026 |
| CORRESP | Letter to the SEC | Feb 17, 2026 | — |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Regulation FD disclosure
|
Feb 2, 2026 | Feb 2, 2026 |
| UPLOAD | Letter from the SEC | Jan 14, 2026 | — |
| 8-K/A |
Amended current report
Results of operations
|
Nov 21, 2025 | Nov 6, 2025 |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Acquisition or sale of assets
|
Nov 6, 2025 | Nov 6, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 22, 2025 | Oct 21, 2025 |
| SD | Specialized disclosure (conflict minerals) | Sep 25, 2025 | — |
| IRANNOTICE | Filing | Aug 7, 2025 | — |
| 10-Q | Quarterly report | Aug 7, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2025 | Aug 7, 2025 |
| CORRESP | Letter to the SEC | Aug 6, 2025 | — |
| 8-K |
Current report
Material agreement, Agreement ended, New debt, Regulation FD disclosure
|
Jul 24, 2025 | Jul 22, 2025 |
| UPLOAD | Letter from the SEC | Jul 23, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 17, 2025 | Jul 16, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 20, 2025 | Jun 16, 2025 |
| S-8 | Employee stock plan registration | Jun 16, 2025 | — |
| DEFA14A | Additional proxy material | Jun 9, 2025 | — |
| CORRESP | Letter to the SEC | Jun 3, 2025 | — |
| UPLOAD | Letter from the SEC | May 19, 2025 | — |
| IRANNOTICE | Filing | May 8, 2025 | — |
| 10-Q | Quarterly report | May 8, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 7, 2025 | May 7, 2025 |
| CORRESP | Letter to the SEC | Apr 25, 2025 | — |
| DEFA14A | Additional proxy material | Apr 25, 2025 | — |
| DEF 14A | Proxy statement | Apr 25, 2025 | Jun 16, 2025 |
| CORRESP | Letter to the SEC | Apr 17, 2025 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 21, 2025 | Mar 21, 2025 |
| CORRESP | Letter to the SEC | Mar 20, 2025 | — |
| UPLOAD | Letter from the SEC | Mar 14, 2025 | — |
| IRANNOTICE | Filing | Mar 4, 2025 | — |
| 10-K | Annual report | Mar 3, 2025 | Dec 31, 2024 |
| CORRESP | Letter to the SEC | Feb 24, 2025 | — |
| 8-K |
Current report
Results of operations
|
Feb 20, 2025 | Feb 20, 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 | — |
| 8-K |
Current report
Officer or director change
|
Dec 11, 2024 | Dec 5, 2024 |
| IRANNOTICE | Filing | Nov 4, 2024 | — |
| 10-Q | Quarterly report | Nov 4, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Nov 4, 2024 | Sep 30, 2024 |
| SD | Specialized disclosure (conflict minerals) | Sep 27, 2024 | — |
| 10-Q | Quarterly report | Aug 8, 2024 | Jun 30, 2024 |
| IRANNOTICE | Filing | Aug 8, 2024 | — |
| 8-K |
Current report
Results of operations
|
Aug 8, 2024 | Aug 8, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Jun 7, 2024 | Jun 3, 2024 |
| DEFA14A | Additional proxy material | May 28, 2024 | — |
| IRANNOTICE | Filing | May 1, 2024 | — |
| 10-Q | Quarterly report | May 1, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 1, 2024 | May 1, 2024 |
| DEFA14A | Additional proxy material | Apr 18, 2024 | — |
| DEF 14A | Proxy statement | Apr 18, 2024 | Jun 3, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 25, 2024 | Mar 25, 2024 |
| IRANNOTICE | Filing | Mar 15, 2024 | — |
| 10-K | Annual report | Mar 15, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 21, 2024 | Feb 21, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 19, 2023 | Dec 19, 2023 |
| IRANNOTICE | Filing | Nov 8, 2023 | — |
| 10-Q | Quarterly report | Nov 8, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2023 | Nov 8, 2023 |
| IRANNOTICE | Filing | Aug 9, 2023 | — |
| 10-Q | Quarterly report | Aug 9, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2023 | Aug 9, 2023 |
| EFFECT | Filing | Jun 9, 2023 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 9, 2023 | Jun 5, 2023 |
| CORRESP | Letter to the SEC | Jun 8, 2023 | — |
| CORRESP | Letter to the SEC | May 15, 2023 | — |
| S-3/A | Filing | May 12, 2023 | — |
| IRANNOTICE | Filing | May 9, 2023 | — |
| 10-Q | Quarterly report | May 9, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 8, 2023 | May 8, 2023 |
| 8-K |
Current report
Material agreement
|
May 5, 2023 | May 2, 2023 |
| DEFA14A | Additional proxy material | Apr 18, 2023 | — |
| DEF 14A | Proxy statement | Apr 18, 2023 | — |
| UPLOAD | Letter from the SEC | Mar 23, 2023 | — |
| S-3 | Shelf registration | Mar 17, 2023 | — |
| IRANNOTICE | Filing | Feb 27, 2023 | — |
| 10-K | Annual report | Feb 27, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 23, 2023 | Feb 23, 2023 |
| POSASR | Filing | Feb 14, 2023 | — |
| 8-K |
Current report
Material agreement, New debt
|
Dec 12, 2022 | Dec 12, 2022 |
| IRANNOTICE | Filing | Nov 7, 2022 | — |
| 10-Q | Quarterly report | Nov 7, 2022 | Sep 30, 2022 |
| 8-K | Current report | Nov 7, 2022 | Nov 7, 2022 |
| IRANNOTICE | Filing | Aug 9, 2022 | — |
| 10-Q | Quarterly report | Aug 9, 2022 | Jun 30, 2022 |
| 8-K | Current report | Aug 9, 2022 | Aug 9, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 1, 2022 | Aug 1, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 22, 2022 | Jun 22, 2022 |
| 8-K |
Current report
Material agreement, New debt, Shareholder vote results
|
Jun 16, 2022 | Jun 13, 2022 |
| S-3ASR | Automatic shelf registration | May 20, 2022 | — |
| IRANNOTICE | Filing | May 2, 2022 | — |
| 10-Q | Quarterly report | May 2, 2022 | Mar 31, 2022 |
| DEFA14A | Additional proxy material | Apr 29, 2022 | — |
| DEF 14A | Proxy statement | Apr 29, 2022 | Jun 13, 2022 |
| 8-K | Current report | Apr 28, 2022 | Apr 28, 2022 |
| IRANNOTICE | Filing | Feb 25, 2022 | — |
| 10-K | Annual report | Feb 25, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2022 | Feb 24, 2022 |
| 8-K |
Current report
Material agreement, New debt
|
Feb 9, 2022 | Feb 4, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 4, 2022 | Feb 1, 2022 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 27, 2021 | Dec 23, 2021 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Dec 8, 2021 | Dec 6, 2021 |
| IRANNOTICE | Filing | Nov 5, 2021 | — |
| 10-Q | Quarterly report | Nov 5, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Material agreement, New debt, Regulation FD disclosure
|
Nov 3, 2021 | Nov 2, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2021 | Nov 3, 2021 |
| IRANNOTICE | Filing | Aug 5, 2021 | — |
| 10-Q | Quarterly report | Aug 5, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2021 | Aug 4, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Jun 17, 2021 | Jun 14, 2021 |
| 8-K |
Current report
Officer or director change
|
May 28, 2021 | May 26, 2021 |
| DEFA14A | Additional proxy material | May 17, 2021 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
May 17, 2021 | May 17, 2021 |
| IRANNOTICE | Filing | May 7, 2021 | — |
| 10-Q | Quarterly report | May 7, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 5, 2021 | May 5, 2021 |
| DEFA14A | Additional proxy material | Apr 22, 2021 | — |
| DEF 14A | Proxy statement | Apr 22, 2021 | Jun 14, 2021 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Apr 15, 2021 | Apr 14, 2021 |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Apr 12, 2021 | Apr 6, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 5, 2021 | Apr 5, 2021 |
| 8-K |
Current report
Other events
|
Mar 25, 2021 | Mar 25, 2021 |
| 8-K |
Current report
Officer or director change
|
Mar 12, 2021 | Mar 8, 2021 |
| IRANNOTICE | Filing | Mar 4, 2021 | — |
| 10-K | Annual report | Mar 4, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
Feb 18, 2021 | Feb 18, 2021 |
| 8-K |
Current report
Officer or director change
|
Feb 12, 2021 | Feb 8, 2021 |
| 8-K |
Current report
Officer or director change
|
Jan 29, 2021 | Jan 29, 2021 |
| 8-K |
Current report
Other events
|
Dec 7, 2020 | Dec 7, 2020 |
| IRANNOTICE | Filing | Nov 5, 2020 | — |
| 10-Q | Quarterly report | Nov 5, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations
|
Oct 29, 2020 | Oct 29, 2020 |
| 8-K |
Current report
Other events
|
Oct 20, 2020 | Oct 20, 2020 |
| IRANNOTICE | Filing | Aug 6, 2020 | — |
| 10-Q | Quarterly report | Aug 6, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2020 | Aug 5, 2020 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt
|
Jul 2, 2020 | Jul 1, 2020 |
| 8-K |
Current report
Other events
|
Jun 19, 2020 | Jun 18, 2020 |
| 8-K |
Current report
Material agreement, Other events
|
Jun 18, 2020 | Jun 17, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Jun 11, 2020 | Jun 8, 2020 |
| DEFA14A | Additional proxy material | May 22, 2020 | — |
| IRANNOTICE | Filing | May 4, 2020 | — |
| 10-Q | Quarterly report | May 4, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
Apr 30, 2020 | Apr 30, 2020 |
| DEFA14A | Additional proxy material | Apr 22, 2020 | — |
| DEF 14A | Proxy statement | Apr 22, 2020 | Apr 22, 2020 |
| 8-K |
Current report
New debt, Other events
|
Mar 24, 2020 | Mar 19, 2020 |
| IRANNOTICE | Filing | Feb 27, 2020 | — |
| 10-K | Annual report | Feb 27, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 20, 2020 | Feb 20, 2020 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Dec 6, 2019 | Dec 3, 2019 |
| IRANNOTICE | Filing | Nov 8, 2019 | — |
| 10-Q | Quarterly report | Nov 8, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2019 | Nov 5, 2019 |
| S-8 | Employee stock plan registration | Aug 9, 2019 | — |
| IRANNOTICE | Irannotice q2 2019 | Aug 8, 2019 | — |
| 10-Q | Quarterly report | Aug 8, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 1, 2019 | Aug 1, 2019 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 6, 2019 | Jun 3, 2019 |
| 8-K |
Current report
Other events
|
May 29, 2019 | May 28, 2019 |
| 8-K/A |
Amended current report
Officer or director change
|
May 15, 2019 | May 3, 2019 |
| EFFECT | Filing | May 9, 2019 | — |
| IRANNOTICE | Irannotice q1 2019 | May 8, 2019 | — |
| 10-Q | Quarterly report | May 8, 2019 | Mar 31, 2019 |
| CORRESP | Letter to the SEC | May 8, 2019 | — |
| S-3/A | S-3/a pre-effective amendment | May 7, 2019 | — |
| 8-K |
Current report
Material agreement, New debt, Officer or director change
|
May 3, 2019 | May 3, 2019 |
| 8-K |
Current report
Results of operations
|
Apr 30, 2019 | Apr 30, 2019 |
| DEFA14A | Additional proxy material | Apr 22, 2019 | — |
| DEF 14A | Proxy statement | Apr 22, 2019 | Dec 31, 2018 |
| UPLOAD | Letter from the SEC | Mar 7, 2019 | — |
| S-3 | Shelf registration | Mar 1, 2019 | — |
| IRANNOTICE | Irannotice - q4 2018 | Feb 28, 2019 | — |
| 10-K | Annual report | Feb 28, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Results of operations
|
Feb 21, 2019 | Feb 21, 2019 |
| POSASR | Posasr - 2019 amendment no. 1 | Feb 14, 2019 | — |
| 8-K |
Current report
Other events
|
Nov 28, 2018 | Nov 28, 2018 |
| IRANNOTICE | Irannotice - q3 2018 | Nov 2, 2018 | — |
| 10-Q | Quarterly report | Nov 2, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Results of operations
|
Oct 25, 2018 | Oct 25, 2018 |
Showing 200 filings, the most recent 200. 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.