Century Aluminum Company (CENX) ownership: Top institutional holder: Glencore plc ($1.74B). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Glencore plc | 29690702.00 | $1.74B | 2026-03-31 |
| BlackRock, Inc. | 9010379.00 | $528.82M | 2026-03-31 |
| STATE STREET CORP | 4667540.00 | $273.94M | 2026-03-31 |
| VANGUARD GROUP INC | 6939794.00 | $271.90M | 2025-12-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4241557.00 | $248.94M | 2026-03-31 |
| Sourcerock Group LLC | 2687249.00 | $157.71M | 2026-03-31 |
| FMR LLC | 2660054.00 | $156.12M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2586107.00 | $151.78M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-03-25 | |
| Sell | null | 2026-03-25 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.