SCHEDULE: Vanguard Group Amends Century Aluminum Stake to 7.43%

The Vanguard Group has filed an Amendment No. 5 to its Schedule 13G, reporting a 7.43% beneficial ownership in Century Aluminum Co as of December 31, 2025.

Summary

• The Vanguard Group reported beneficial ownership of 6,939,794 shares of Century Aluminum Co common stock.
• This represents 7.43% of the class of securities.
• Vanguard holds 453,948 shares with shared voting power and 6,939,794 shares with shared dispositive power.
• The filing is an Amendment No. 5 to a Schedule 13G.
• The Vanguard Group, Inc. underwent an internal realignment on January 12, 2026, ceasing portfolio management services and proxy voting administration.
• Certain subsidiaries or business divisions of The Vanguard Group, Inc. are expected to report beneficial ownership separately (disaggregated basis) following the realignment.

Sentiment

Score: 6

Explanation: StockSavvy.ai views this as a neutral-to-slightly positive update. While the ownership percentage remains substantial, the internal realignment at Vanguard could lead to disaggregated reporting, which might slightly dilute the perception of a single large institutional holder, though the underlying investment remains.

Positives

• The filing indicates a significant, stable institutional ownership position by The Vanguard Group in Century Aluminum Co, which can be viewed positively by the market.

Negatives

• The internal realignment at The Vanguard Group, Inc. means it will no longer directly perform portfolio management or proxy voting, potentially leading to a disaggregated reporting of ownership by its subsidiaries, which could alter the perception of a single large institutional holder over time.

Risks

• The internal realignment within The Vanguard Group, Inc. could lead to a fragmentation of reported beneficial ownership, potentially impacting how the market perceives institutional interest in Century Aluminum Co.

Future Outlook

The Vanguard Group, Inc. anticipates that certain subsidiaries or business divisions will report beneficial ownership separately (on a disaggregated basis) from The Vanguard Group, Inc. in reliance on SEC Release No. 34-39538, following an internal realignment effective January 12, 2026.

Management Comments

• "By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under 240.14a-11."

Industry Context

StockSavvy.ai notes that Schedule 13G filings are routine disclosures by passive institutional investors holding more than 5% of a company's stock. Vanguard's continued significant stake in Century Aluminum Co reflects its inclusion in various index funds and passively managed portfolios, rather than an active strategic investment decision specific to the company's operational performance or industry trends. The internal realignment at Vanguard is an internal operational change, not directly related to Century Aluminum's industry position.

Comparison to Industry Standards

• Vanguard's 7.43% stake in Century Aluminum Co is a typical passive investment size for a large index fund manager in a mid-cap industrial company, aligning with its strategy of broad market exposure.
• Compared to active funds, which might take larger, more concentrated positions or engage in activist investing, Vanguard's role as a passive holder is standard for its investment philosophy.

Stakeholder Impact

• Shareholders: The continued significant passive ownership by Vanguard provides a level of stability and liquidity for Century Aluminum Co's stock.
• The Vanguard Group's clients: Clients continue to beneficially own the shares, with rights to dividends and proceeds from sales, consistent with their investment objectives.

Next Steps

• The Vanguard Group's subsidiaries or business divisions are anticipated to report beneficial ownership separately in future filings.

Key Dates

Recommendation

This Schedule 13G/A filing primarily updates beneficial ownership information and details an internal organizational change at The Vanguard Group. It does not contain new financial performance data, strategic shifts, or material operational news for Century Aluminum Co that would warrant a change in investment recommendation. The continued significant, albeit passive, institutional ownership is a neutral factor for the stock's fundamental outlook.

Keywords

Century Aluminum Co, Vanguard Group, Schedule 13G, Beneficial Ownership, Common Stock, Institutional Investor, Investment Adviser, SEC Filing, Ownership Stake