Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
370 institutional managers reported holding CENX for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 61%. 98 opened new positions; 49 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Glencore plc (focused) | 29.69M | 28.39% | $1.74B | trimmed -44.5% | 2024 Q4 |
| BlackRock | 9.01M | 8.61% | $528.7M | trimmed -5% | ≤2013 |
| Vanguard Group | 7.31M | 6.99% | $428.9M | added +5.2% | ≤2013 |
| State Street | 4.67M | 4.46% | $273.9M | added +8.7% | ≤2013 |
| Sourcerock Group LLC (focused) | 2.69M | 2.57% | $157.7M | trimmed -25.8% | 2024 Q3 |
| FMR (Fidelity) | 2.66M | 2.54% | $156.1M | added +30454.3% | 2021 Q2 |
| Dimensional Fund Advisors | 2.19M | 2.10% | $128.6M | trimmed -20.8% | ≤2013 |
| Invesco | 2.08M | 1.99% | $121.9M | added +229.9% | ≤2013 |
| Millennium Management | 1.99M | 1.90% | $116.6M | added +40.2% | 2017 Q1 |
| Assenagon Asset Management S.a. | 1.83M | 1.75% | $107.4M | added +109.7% | 2021 Q1 |
| Morgan Stanley | 1.59M | 1.52% | $93.0M | trimmed -1.5% | 2013 Q3 |
| Encompass Capital Advisors LLC | 1.55M | 1.48% | $91.0M | added +210.4% | 2025 Q1 |
| Geode Capital | 1.54M | 1.47% | $90.4M | added +16.8% | ≤2013 |
| D. E. Shaw | 1.43M | 1.37% | $84.1M | added +20.4% | 2022 Q3 |
| Jane Street | 1.32M | 1.26% | $77.5M | added +3081.6% | 2021 Q1 |
| Citadel Advisors | 1.32M | 1.26% | $77.5M | added +89.4% | ≤2013 |
| Impala Asset Management LLC (focused) | 975.0k | 0.93% | $57.2M | added +13.7% | 2023 Q4 |
| Fisher Investments | 851.3k | 0.81% | $50.0M | trimmed -1.8% | 2018 Q2 |
| Mirae Asset Global Etfs Holdings LTD. | 800.1k | 0.77% | $47.0M | trimmed -46.4% | 2018 Q3 |
| Bridgewater Associates | 732.5k | 0.70% | $43.0M | added +169.5% | 2025 Q4 |
| Voloridge Investment Management | 720.7k | 0.69% | $42.3M | trimmed -23.4% | 2020 Q3 |
| UBS | 683.1k | 0.65% | $40.1M | trimmed -63.2% | ≤2013 |
| Bank OF America CORP /DE/ | 608.8k | 0.58% | $35.7M | added +98% | ≤2013 |
| Deutsche Bank AG\ | 598.0k | 0.57% | $35.1M | added +452.3% | 2013 Q3 |
| Qube Research & Technologies LTD | 589.9k | 0.56% | $34.6M | trimmed -18.8% | 2024 Q3 |
| Mountaineer Partners Management, LLC (focused) | 584.0k | 0.56% | $34.3M | trimmed -4% | 2022 Q4 |
| Point72 | 569.5k | 0.54% | $33.4M | added +230.3% | 2025 Q3 |
| Allspring Global Investments Holdings, LLC | 562.0k | 0.54% | $33.0M | added +23.3% | 2025 Q3 |
| Northern Trust | 548.7k | 0.53% | $32.2M | added +5.2% | ≤2013 |
| Charles Schwab Investment Management | 544.5k | 0.52% | $32.0M | added +1.6% | ≤2013 |
| Bornite Capital Management LP (focused) | 542.0k | 0.52% | $31.8M | added +116.8% | 2025 Q4 |
| Kinetic Partners Management, LP (focused) | 531.7k | 0.51% | $31.2M | opened | 2026 Q1 |
| Merewether Investment Management, LP | 514.8k | 0.49% | $30.2M | opened | 2026 Q1 |
| Jefferies Financial Group INC. | 484.2k | 0.46% | $28.4M | added +353.8% | 2025 Q3 |
| Rokos Capital Management LLP | 436.7k | 0.42% | $25.6M | opened | 2026 Q1 |
| Squarepoint Ops LLC | 410.1k | 0.39% | $24.1M | added +1001.8% | 2021 Q3 |
| Goldman Sachs | 379.1k | 0.36% | $22.2M | trimmed -43% | ≤2013 |
| Wellington Management | 378.4k | 0.36% | $22.2M | added +91.3% | 2021 Q3 |
| Westend Capital Management, LLC | 378.1k | 0.36% | $22.2M | added +1% | 2025 Q4 |
| BNY Mellon | 335.9k | 0.32% | $19.7M | unchanged | ≤2013 |
| Boston Partners | 309.9k | 0.30% | $18.2M | trimmed -48.4% | 2025 Q1 |
| Nuveen | 309.0k | 0.29% | $18.1M | added +163.4% | 2019 Q2 |
| BW Gestao de Investimentos Ltda. | 308.8k | 0.29% | $18.1M | added +68.1% | 2025 Q1 |
| Engineers Gate Manager LP | 297.5k | 0.28% | $17.5M | added +500.7% | 2023 Q3 |
| Picton Mahoney Asset Management | 295.3k | 0.28% | $17.3M | opened | 2026 Q1 |
| Nicholas Investment Partners, LP | 292.4k | 0.28% | $17.2M | unchanged | 2025 Q4 |
| Drummond Knight Asset Management Pty LTD (focused) | 281.1k | 0.27% | $16.5M | trimmed -10.3% | 2025 Q4 |
| Tudor Investment | 279.2k | 0.27% | $16.4M | trimmed -23.7% | 2025 Q4 |
| Steamboat Capital Partners, LLC | 276.2k | 0.26% | $16.2M | trimmed -34.8% | 2023 Q4 |
| Canada Life Assurance CO | 275.4k | 0.26% | $16.2M | added +136.4% | 2013 Q4 |
Largest 50 of 370 shown; the full ranked, searchable register is at boothcheck.com/holders/CENX. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.