Century Aluminum Co. filings document the regulatory record of a Nasdaq-listed primary aluminum producer, including earnings-related Form 8-K reports, annual meeting proxy materials and material-event disclosures. The filings cover operating results, aluminum shipments, liquidity, non-GAAP measures, common stock registration details and governance matters presented to shareholders.
Recent disclosures also address accounting treatment for the Jamalco Production Assets, related non-reliance and late-filing notices, and material agreements involving subsidiary asset sales. The filing record ties these items to Century's aluminum operations, consolidation policies, board oversight, capital structure and public-company reporting obligations.
Century Aluminum Company files a comprehensive annual report that restates prior financial statements after changing how it consolidates its 55% Jamalco joint venture; the restatement does not change net income attributable to Century stockholders. The company reports 2025 aluminum production of 638,000 tonnes versus 770,000 tonnes of capacity and discloses an adverse opinion on internal control over financial reporting.
Century highlights a new joint development agreement with Emirates Global Aluminium to build a 750,000‑tonne‑per‑year primary aluminum smelter in Inola, Oklahoma, where Century will own 40%. It also completed the $200 million sale of its idled Hawesville, Kentucky site for cash and a 6.8% minority interest in a planned data center project, and notes a transformer failure that has temporarily cut output at its Grundartangi, Iceland smelter by about two‑thirds. Customer concentration remains high, with Glencore accounting for 54% of 2025 sales and owning 36.4% of Century’s common stock.
Century Aluminum Company is changing how it accounts for its 55% interest in the Jamalco joint venture, moving from proportionate consolidation to fully consolidating the Jamalco production assets with higher noncontrolling interest. This change follows SEC staff comment letters on prior filings.
The company determined this accounting change is material and concluded that its previously issued consolidated financial statements for 2023, 2024 and several interim periods should no longer be relied upon and will be restated. The change increases total assets and total equity, while gross profit is reduced by less than 10% in each affected period, but net income attributable to Century stockholders and total stockholders’ equity are unchanged.
Century Aluminum expects to report a material weakness in internal control over financial reporting in connection with these restatements. The impacts and corrected figures are to be reflected in its 2025 Form 10-K, and recent Q4 2025 unaudited results already incorporate the new accounting.
Century Aluminum Company notified the SEC it could not timely file its Annual Report on Form 10-K for the period ended December 31, 2025 because it changed the accounting treatment for its Jamalco joint venture production assets (the Jamalco Production Assets) from proportionate consolidation to full consolidation.
The company says it has reflected the Accounting Change in unaudited results in its Q4 2025 Earnings Release and resolved a related Staff comment; the change increases Total assets, Noncontrolling interests and Total equity, reduces Gross profit (by less than 10% in each period presented) due to higher depreciation and amortization, and does not affect Net income attributable to Century Stockholders, adjusted EBITDA, debt covenant compliance or executive compensation. The company expects to file the 2025 Form 10-K promptly.
Century Aluminum Company executive vice president of global operations Gunnar Gudlaugsson reported an open-market sale of common stock. On February 25, 2026, he sold 43,000 shares at $54.10 per share. After this transaction, he held 136,393 shares, which the disclosure notes include unvested restricted stock units granted under the company’s long-term incentive plans.
Century Aluminum executive John DeZee sold 66,000 shares of common stock in an open-market transaction. The sale occurred on February 23, 2026 at a weighted average price of $50.72 per share, with individual trades ranging from $49.91 to $52.01. After the sale, DeZee directly owned 97,647 shares, including unvested restricted stock units.
Chalres Schwab Corp submitted a Form 144 notice to sell 66,000 common shares. The filing lists an aggregate amount of $3,474,240.00 and shows 93,341,969 shares outstanding as of 02/23/2026.
The securities are listed on Nasdaq and the sale is tied to multiple LTIP award tranches dated between 12/31/2021 and 12/31/2024.