Form 4: Glencore Sells 9M Century Aluminum Shares, Converts Preferred Stock

Glencore International AG reported a sale of 9 million Century Aluminum common shares for $30.25 each and the conversion of preferred stock into 4.95 million common shares, effective November 10, 2025.

Summary

• Glencore International AG, a 10% owner and director of Century Aluminum Co (CENX), reported significant transactions.
• On November 10, 2025, Glencore International AG sold 9,000,000 shares of Century Aluminum common stock at a price of $30.25 per share.
• Following this sale, Glencore International AG directly holds 18,500,000 shares of common stock.
• Concurrently, 49,485.91 shares of Series A Convertible Preferred Stock, held indirectly by Glencore AG (a Glencore International AG subsidiary), were automatically converted into 4,948,591 shares of Century Aluminum common stock.
• Each preferred share converts into 100 common shares.
• After the conversion, Glencore AG indirectly holds 17,505,947 shares of common stock and 0 shares of Series A Convertible Preferred Stock.
• These transactions were made pursuant to a Rule 10b5-1(c) pre-planned trading arrangement.

Sentiment

Score: 4

Explanation: The sale of a large block of shares by a significant insider and director, even if pre-planned, typically carries a negative sentiment as it reduces the insider's stake. The conversion of preferred stock is a structural change but does not fully offset the negative perception of the sale.

Positives

• The conversion of preferred stock into common stock simplifies Glencore's holding structure in Century Aluminum.
• The conversion adds 4,948,591 common shares to Glencore's indirect beneficial ownership.

Negatives

• Glencore International AG sold 9,000,000 shares of common stock, reducing its direct stake in Century Aluminum.
• The sale generated proceeds of approximately $272.25 million (9,000,000 shares * $30.25).

Future Outlook

No specific future outlook or guidance is provided in this filing.

Industry Context

Glencore, a major global diversified natural resource company, is a significant investor in the metals sector, including aluminum. These transactions in Century Aluminum, an aluminum producer, reflect Glencore's strategic investment decisions. The sale could indicate a portfolio rebalancing or a response to market conditions for aluminum, while the conversion simplifies its equity structure in the company.

Corporate Governance

Related Party Transactions

• Glencore International AG, Glencore AG, and Glencore plc are 10% owners and have a director relationship with Century Aluminum Co.
• The reported sale of 9,000,000 common shares and the conversion of preferred stock are transactions between a related party (Glencore entities) and the issuer (Century Aluminum Co).

Stakeholder Impact

• Shareholders: The sale by a significant insider could be interpreted negatively, potentially leading to downward pressure on the stock price. The conversion of preferred stock into common stock increases the float of common shares.

Key Dates

Recommendation

The sale of 9 million shares by a major 10% owner and director, Glencore, signals a reduction in their direct exposure to Century Aluminum. While the transaction was pre-planned, such a significant divestment by a knowledgeable insider can be interpreted by the market as a lack of conviction or a strategic re-evaluation, potentially indicating a less favorable outlook for the stock. This action, despite the concurrent preferred stock conversion, suggests a cautious stance from a key stakeholder.

Keywords

Century Aluminum, CENX, Glencore, GLENCORE INTERNATIONAL AG, stock sale, insider trading, Form 4, beneficial ownership, common stock, preferred stock, Rule 10b5-1, conversion