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Buy Day today: Neutral (46) Mixed market breadth · no major macro event
CENX

Century Aluminum Company

Basic Materials · Aluminum

33.70$ -2.7% vs. previous close Closing price · As of: Oct 30, 2026

Ownership

Ownership Structure

Who owns Century Aluminum Company (CENX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 69.3% of the shares are freely tradable; institutional investors hold 74.5%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 74.5%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 30.9%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 69.3%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 13.4%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 99Mio.

Largest Shareholders

Institutions

Institutions CENX
Name Stake (%) Shares Change (%) Date
Glencore PLC 29.99 29,690,702 +0.0 06/30/2026
BlackRock Inc 10.41 10,304,905 +14.4 06/30/2026
State Street Corp 5.60 5,542,720 +18.8 06/30/2026
Vanguard Portfolio Management, LLC 4.82 4,773,720 +12.5 06/30/2026
Assenagon Asset Management SA 3.09 3,062,334 +67.3 06/30/2026
Vanguard Capital Management, LLC 3.00 2,972,532 +14.9 06/30/2026
Amvescap Plc. 2.44 2,417,794 +16.4 06/30/2026
Sourcerock Group LLC 2.29 2,266,085 -15.7 06/30/2026

Funds

Funds CENX
Name Stake (%) Shares Change (%) Date
iShares Core S&P Small-Cap ETF 4.11 4,066,618 +0.0 09/30/2026
Stt Strt®SPDR®S&P®Mtls &MngETF 2.63 2,601,899 +1.0 09/30/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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