Century Alum Co SEC Filings

Glencore International AG, Glencore AG, and Glencore plc filed a Form 4 for Century Aluminum (CENX) detailing significant insider activity on 11/10/2025. The reporting group, noted as a Director and 10% Owner, sold 9,000,000 shares of common stock at $30.25 (Transaction Code S), leaving 18,500,000 shares directly beneficially owned by Glencore International AG. Separately, an automatic conversion (Code C) of 49,485.91 shares of Series A Convertible Preferred Stock resulted in 4,948,591 common shares, which are held indirectly, with 17,505,947 shares beneficially owned indirectly after the transaction.

Century Aluminum (CENX) reported Q3 2025 results showing higher sales but lower profits. Net sales were $632.2 million versus $539.1 million a year ago, while gross profit was $77.3 million and operating income was $58.3 million. Net income attributable to stockholders was $14.9 million, or $0.15 diluted EPS, compared with $47.3 million, or $0.46 diluted EPS, in Q3 2024. Commodity derivatives generated a $30.2 million quarterly loss, weighing on earnings.

The company strengthened liquidity and extended maturities: it issued $400.0 million of 6.875% senior secured notes due 2032 and redeemed its 2028 notes, recording a $6.2 million extinguishment loss. Cash and cash equivalents rose to $151.4 million from $32.9 million at year‑end. Glencore remained a key counterparty, representing 50.6% of Q3 net sales; purchases from Glencore were $90.7 million. The Section 45X production tax credit reduced Q3 cost of goods sold by $24.7 million. Shares outstanding were 93,341,969 as of November 4, 2025.

Century Aluminum (CENX) announced financial results for the quarter ended September 30, 2025, and released a press release furnished as Exhibit 99.1.

The company will host a live webcast earnings call today at 5:00 p.m. Eastern Time via its website. Registration is recommended at least 10 minutes before the start. A replay and presentation materials will be available approximately two hours after the live call.

Century Aluminum Company reported an electrical equipment failure at its Grundartangi, Iceland aluminum smelter. The company disclosed the event via a press release furnished under Item 7.01 (Regulation FD), attached as Exhibit 99.1.

The furnished information is not deemed “filed” under the Exchange Act. Century Aluminum’s common stock trades on the Nasdaq Global Select Market under the symbol CENX.

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.