Welcome to our dedicated page for CENTURY ALUMINUM CO SEC filings (Ticker: CENX), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
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.
Glencore entities reported Section 16 activity in Century Aluminum (CENX). On 09/30/2025 Glencore AG converted 28.48 shares of Series A Convertible Preferred Stock into 2,848 shares of Common Stock. The filing also reports a disposition of 27,500,000 shares of Common Stock. Following the reported transactions, the filing shows 12,557,356 shares beneficially owned on an indirect basis. The converted preferred shares are held by Glencore AG, which is a direct wholly-owned subsidiary of Glencore International AG; Glencore plc may be deemed an indirect owner of those holdings.
Agust F. Hafberg, SVP & Chief Commercial Officer of Century Aluminum Co. (CENX), reported a sale of 9,493 shares of common stock on 09/26/2025 at a price of $27.91 per share. After the sale, the filing shows 55,260 shares beneficially owned in a direct capacity, and the reported holdings include unvested restricted stock units granted under the companys Long-Term Incentive Plans. The Form 4 was executed by attorney-in-fact Paul Sharobeem and filed on 09/30/2025. No derivative transactions are reported.
Century Aluminum Co (CENX) filed a Form 144 notifying a proposed sale of 9,493 shares of common stock, with an aggregate market value of $249,950.69, to be executed on or about 09/25/2025 through Charles Schwab & Co. The shares were acquired as a restricted stock grant on 12/31/2024 in payment for services. There were 93,339,121 shares outstanding reported on the form, so the sale represents approximately 0.0102% of outstanding shares. The filer states no material nonpublic information is known.
Kenneth L. Calloway, Senior Vice President, Human Resources of Century Aluminum Company (CENX), reported a sale of company stock on 09/19/2025. The Form 4 shows a disposition of 16,450 shares at a price of $27.50 per share. After the reported transaction, Calloway beneficially owned 28,706 shares, an amount the filing notes includes unvested restricted stock units granted under the issuer's long-term incentive plans. The filing was signed by an attorney-in-fact on 09/23/2025 and is submitted pursuant to Section 16 reporting requirements.
CENTURY ALUMINUM CO (CENX) filed a Form 144 to report a proposed sale of 16,450 shares of common stock through Charles Schwab & Co., scheduled approximately for 09/15/2025. The filing shows an aggregate market value of $433,457.50 and states there are 93,339,121 shares outstanding. The shares were acquired on 12/30/2022 as restricted stock grants from the issuer and were issued for services rendered. The filer certifies they are not aware of undisclosed material adverse information.
Matt Aboud, Senior Vice President of Strategy & Business Development at Century Aluminum Co. (CENX), reported a sale of 12,027 shares of the issuer's common stock on 08/12/2025 at a reported price of $23.27 per share. After the transaction, the reporting person beneficially owned 62,589 shares in total. The filing notes that the post-transaction balance includes unvested RSUs granted under the company’s long-term incentive plans. The transaction was reported on a Form 4 as required for officers and other insiders.
Century Aluminum Co (CENX) filed a Form 144 notifying a proposed sale of 12,027 common shares through Charles Schwab with an aggregate market value of $277,102.08. The notice lists 93,339,121 shares outstanding and an approximate sale date of 08/12/2025 on NASDAQ.
The shares were acquired via restricted stock unit vesting: 8,956 shares on 12/31/2021 and 3,071 shares on 12/31/2024. The filer reports no securities sold during the past three months and attests there is no undisclosed material adverse information.