Century Aluminum Co
CENX- Exchange
- Nasdaq
- Industry
- Primary Production of Aluminum
- SEC CIK
- 0000949157
No open-market purchases or sales by Century Aluminum Co insiders were filed in the last 90 days; 416 institutions reported holding it in 13F filings for Q2 2026, worth $4.79B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Century Aluminum Co as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 387
- +66 vs. Q4 2025
- Shares held
- 101.0M
- +8.01M (+8.6%) vs. Q4 2025
- Total value
- $5.92B
- +$2.28B (+62.6%) vs. Q4 2025
- New holders
- 107
- 130 more added
- Sold out
- 41
- 122 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CENX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 416 | $4.79B |
| Q1 2026 | 387 | $5.92B |
| Q4 2025 | 326 | $3.92B |
| Q3 2025 | 255 | $2.83B |
| Q2 2025 | 222 | $1.72B |
| Q1 2025 | 218 | $1.72B |
| Q4 2024 | 222 | $1.68B |
| Q3 2024 | 197 | $892.4M |
| Q2 2024 | 191 | $923.2M |
| Q1 2024 | 180 | $829.8M |
| Q4 2023 | 171 | $693.3M |
| Q3 2023 | 162 | $378.2M |
| Q2 2023 | 160 | $438.5M |
| Q1 2023 | 168 | $518.2M |
| Q4 2022 | 169 | $423.5M |
| Q3 2022 | 176 | $269.4M |
| Q2 2022 | 172 | $415.9M |
| Q1 2022 | 190 | $1.39B |
| Q4 2021 | 164 | $844.8M |
| Q3 2021 | 148 | $674.8M |
| Q2 2021 | 146 | $673.3M |
| Q1 2021 | 139 | $823.3M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Century Aluminum Co; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Verition Fund Management LLC | 0 | $0 | 0.00% | −54,280−100.0% | Sold out |
| Beartown Capital Management, LLC | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Capital Fund Management S.A. | 0 | $0 | 0.00% | −34,505−100.0% | Sold out |
| O'Neil Global Advisors, Inc. | 0 | $0 | 0.00% | −28,741−100.0% | Sold out |
| Natixis | 0 | $0 | 0.00% | −28,076−100.0% | Sold out |
| Lombard Odier Asset Management (USA) Corp | 0 | $0 | 0.00% | −24,659−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −23,233−100.0% | Sold out |
| Cambria Investment Management, L.P. | 0 | $0 | 0.00% | −20,902−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −17,933−100.0% | Sold out |
| PharVision Advisers, LLC | 0 | $0 | 0.00% | −16,022−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −14,410−100.0% | Sold out |
| Three Seasons Wealth, LLC | 0 | $0 | 0.00% | −12,639−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −12,622−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −11,992−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −9,591−100.0% | Sold out |
| CenterBook Partners LP | 0 | $0 | 0.00% | −9,582−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −8,789−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −7,591−100.0% | Sold out |
| Pinpoint Asset Management (Singapore) Pte. Ltd. | 0 | $0 | 0.00% | −7,032−100.0% | Sold out |
| Versor Investments LP | 0 | $0 | 0.00% | −5,109−100.0% | Sold out |
| Kestra Advisory Services, LLC | 0 | $0 | 0.00% | −4,184−100.0% | Sold out |
| USA Financial Portformulas Corp | 0 | $0 | 0.00% | −1,542−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −683−100.0% | Sold out |
| Hoey Investments, Inc | 0 | $0 | 0.00% | −175−100.0% | Sold out |
| Federation des caisses Desjardins du Quebec | 0 | $0 | 0.00% | −150−100.0% | Sold out |
| Globeflex Capital L P | 0 | $0 | 0.00% | −47−100.0% | Sold out |
| Optima Capital LLC | 0 | $0 | 0.00% | −42−100.0% | Sold out |
| Flagship Harbor Advisors, LLC | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |
| Motiv8 Investments LLC | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |