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Century Aluminum Co (CENX): material weakness open 1,033 days
By Russell Tomoum, Ctrl Worx™. Built from its own SEC filings. How the Clock works.
Century Aluminum Co reported ineffective internal control over financial reporting because of a material weakness in 8 filings since Mar 15, 2024. The latest was its 10-Q for the period ended Jun 30, 2026.
Ctrl Worx Watch List™ status
On the ClockStill filing, and no annual report of its own says the weakness is fixed.
Checked against SEC EDGAR: Oct 29, 2026 · Entry #10249
Causes the company named
Financial close and reporting · 6ITGC: general · 4Accounting expertise and resources · 2Segregation of duties · 2Inventory · 2ITGC: user access · 2ITGC: change management · 2Other · 1Complex or non-routine accounting · 1
What the latest filing says
Based upon that evaluation, our management, including the Chief Executive Officer and Principal Financial Officer, concluded that our disclosure controls and procedures were not effective as of June 30, 2026. Previously Reported Material Weakness in Internal Control over Financial Reporting Management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Exchange Act Rule 13a-15(f) and 15d-15(f) based on the criteria established in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission ("the COSO Framework"). As reported in our Form 10-K for the fiscal year ended December 31, 2025, we did not maintain effective internal control over financial reporting as of December 31, 2025 as a result of a material weakness related to deficiencies identified in business process level controls at our Jamalco joint venture and financial reporting controls over the consolidation of the Jamalco joint venture. A material weakness (as defined in Rule 12b-2 under the Exchange Ac [...]
From the controls section of the 10-Q filed Aug 6, 2026. Read the full filing on SEC EDGAR.
Company response: Century Aluminum Co can send a statement or a link to its remediation update to russell@ctrlworx.com. We post it here, unedited and dated.
Filings
| Filed | Form | Period | Controls | Causes | Filing |
|---|---|---|---|---|---|
| Aug 6, 2026 | 10-Q | Jun 30, 2026 | Not effective | Financial close and reporting; Other | EDGAR |
| May 7, 2026 | 10-Q | Mar 31, 2026 | Not effective | Financial close and reporting; Accounting expertise and resources; ITGC: general | EDGAR |
| Mar 3, 2026 | 10-K | Dec 31, 2025 | Not effective | Segregation of duties; Financial close and reporting; Accounting expertise and resources; ITGC: general; Inventory | EDGAR |
| Nov 6, 2025 | 10-Q | Sep 30, 2025 | Not effective | Segregation of duties; ITGC: general | EDGAR |
| Aug 7, 2025 | 10-Q | Jun 30, 2025 | Not effective | Financial close and reporting; ITGC: user access; ITGC: change management | EDGAR |
| May 8, 2025 | 10-Q | Mar 31, 2025 | Not effective | Financial close and reporting; ITGC: general | EDGAR |
| Mar 3, 2025 | 10-K | Dec 31, 2024 | Not effective | Financial close and reporting; ITGC: user access; ITGC: change management; Inventory | EDGAR |
| Mar 15, 2024 | 10-K | Dec 31, 2023 | Not effective | Complex or non-routine accounting | EDGAR |
Others on the Clock in the same industry
By SEC industry code: 3334, Primary Production of Aluminum, then related codes.
- Quanex Building Products CORP (NX) · open since Oct 2024
- UNITED STATES ANTIMONY CORP (UAMY) · open since Dec 2020 or earlier
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