CENX · Century Aluminum Co · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding CENX
All superinvestors →Holder Concentration
Across 421 13F filersWho Holds CENX
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 415 filers, like-for-like change +3.1%; actively managed books -1.8%; index-like books +17.8%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 29.5% | 214 | +3.1% |
| Exempt adviser | 1.1% | 5 | +13.2% |
| Adviser | 4.7% | 10 | +43.7% |
| Bank | 8.9% | 18 | +17.4% |
| Insurer | 0.4% | 3 | +9.9% |
| Broker-dealer | 0.1% | 2 | +59.2% |
| Benefit plan | 0.3% | 8 | +25.3% |
| Non-US | 1.7% | 12 | +15.9% |
| Holding company | 44.7% | 12 | +3.8% |
| Unknown | 8.7% | 131 | -23.8% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 25.3% | 41 | +17.8% |
| Systematic-like | 6.4% | 34 | -22.9% |
| Concentrated | 6.0% | 70 | -12.2% |
| Diversified active | 33.7% | 269 | +6.0% |
| Unknown | 28.5% | 1 | 0.0% |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 65.4% | 207 | +7.6% |
| Medium turnover | 12.0% | 102 | +17.1% |
| High turnover | 14.2% | 73 | -22.6% |
| Unknown | 8.4% | 33 | +9.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 10.5% | 54 | +0.6% |
| Medium horizon | 46.9% | 87 | +1.0% |
| Long horizon | 37.2% | 237 | +5.4% |
| Unknown | 5.4% | 37 | +12.3% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 3.2% | 107 | -30.6% |
| $1B to $10B | 37.0% | 121 | -1.5% |
| $10B to $100B | 11.9% | 113 | +13.7% |
| $100B or more | 47.9% | 74 | +7.9% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 0.7% | 107 | -3.2% |
| Pooled investment vehicles | 11.1% | 43 | -19.2% |
| Registered funds and BDCs | 14.9% | 27 | +26.0% |
| Pension and profit sharing plans | 0.0% | 1 | +78.9% |
| Insurance companies | 0.1% | 3 | +45.1% |
| Charitable organizations | 0.0% | 1 | new |
| Governments and sovereign funds | 0.2% | 4 | -38.0% |
| Other investment advisers | 0.1% | 6 | +19.1% |
| Other | 0.2% | 3 | +348.6% |
| Diversified | 2.2% | 18 | +20.5% |
| Corporations | 0.0% | 0 | — |
| Unknown | 70.6% | 202 | +3.1% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 13.9% | 65 | -10.2% |
| Private equity funds | 1.0% | 11 | +57.0% |
| Venture capital funds | 0.0% | 1 | +4.2% |
| Real estate funds | 0.0% | 3 | -46.8% |
| Liquidity funds | 0.0% | 1 | +11.3% |
| Securitized asset funds | 0.1% | 1 | +4.1% |
| Other private funds | 3.3% | 13 | +7.5% |
| Mixed private funds | 0.1% | 1 | -12.0% |
| Private funds, type not stated | 0.5% | 3 | +318.1% |
| No private funds | 11.7% | 120 | +15.7% |
| Unknown | 69.4% | 196 | +3.0% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 63.1% | 340 | +4.4% |
| Outside the US | 36.9% | 75 | +0.9% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 5 holders with no observed 2026-03-31 13F and 3 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
415 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $898,236 (1 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 29.6% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies CENX's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | NVGS Navigator Holdings Ltd. | 4 |
| 2 | BKV BKV Corp | 5 |
| 3 | PDS PRECISION DRILLING Corp | 4 |
| 4 | CNR Core Natural Resources, Inc. | 7 |
| 5 | TH Target Hospitality Corp. | 5 |
| 6 | MEOH Methanex Corp | 5 |
| 7 | ERO Ero Copper Corp. | 5 |
| 8 | LPG Dorian Lpg Ltd. | 4 |
| 9 | OII Oceaneering International Inc | 5 |
| 10 | EROK EagleRock Land, LLC | 4 |
Shareholder Targets
13F filers that own its peers but not CENX, quarter ended Jun 30, 2026Found through its holder-overlap peers: NVGS, BKV, PDS, CNR, TH, MEOH, ERO, LPG, OII, EROK, AA, TALO, MT, CSTM, GPRE, PUMP, SBLK, HBM, CCJ, AR. 1,522 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | FIL Ltd Non-US, Diversified active | $1,920,035,602 5 held | CCJ, HBM, ERO |
| 2 | AMERICAN CENTURY COMPANIES INC Unknown, Diversified active | $1,045,993,840 18 held | OII, HBM, CSTM |
| 3 | NORGES BANK Non-US, Index-like | $853,263,753 8 held | CCJ, HBM, AA |
| 4 | MACKENZIE FINANCIAL CORP Registered adviser, Diversified active | $714,654,695 10 held | HBM, CCJ, MEOH |
| 5 | M&G PLC Holding company, Diversified active | $623,026,611 2 held | MEOH, CCJ |
| 6 | EAGLE CAPITAL MANAGEMENT LLC Registered adviser, Diversified active | $619,413,136 1 held | AA |
| 7 | TD Asset Management Inc Unknown, Diversified active | $598,615,747 5 held | CCJ, HBM, MEOH |
| 8 | Connor, Clark & Lunn Investment Management Ltd. Registered adviser, Diversified active | $567,410,377 12 held | CCJ, HBM, MT |
| 9 | GMT Capital Corp Registered adviser, Concentrated | $507,327,066 2 held | HBM, ERO |
| 10 | KEYBANK NATIONAL ASSOCIATION/OH Bank, Diversified active | $438,163,620 4 held | CCJ, ERO, TH |
Fund Ownership of CENX by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 22.30% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 3.01% | 2,983,621 |
| Index ETFs | 19.29% | 19,091,829 |
| Active ETFs | 1.23% | 1,214,878 |
| Active funds | 9.05% | 8,956,269 |
| Unclassified | 0.38% | 372,020 |
| All registered funds | 32.95% | 32,618,617 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mid Glencore plc Holding company | $1,068,271,457 | 23.18% | 29,690,702 | Shares | 2026-10-14 | |
| Mega BlackRock, Inc. Holding company | $474,128,673 | 10.29% | 10,304,905 | Shares | 2026-08-07 | |
| Mega STATE STREET CORP Bank | $255,020,547 | 5.53% | 5,542,720 | Shares | 2026-09-22 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $219,638,857 | 4.77% | 4,773,720 | Shares | 2026-08-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $136,766,197 | 2.97% | 2,972,532 | Shares | 2026-08-13 | |
| Mega Invesco Ltd. Adviser | $111,242,699 | 2.41% | 2,417,794 | Shares | 2026-08-14 | |
| Mid Sourcerock Group LLC Registered adviser | $104,262,570 | 2.26% | 2,266,085 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $101,751,205 | 2.21% | 2,211,502 | Shares | 2026-08-11 | |
| Mega FMR LLC Holding company | $90,195,839 | 1.96% | 1,960,353 | Shares | 2026-08-13 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $84,971,267 | 1.84% | 1,846,800 | Shares | 2026-08-12 | |
| Mega Fisher Asset Management, LLC Adviser | $70,597,974 | 1.53% | 1,534,405 | Shares | 2026-08-04 | |
| Mega MORGAN STANLEY Holding company | $69,509,879 | 1.51% | 1,510,756 | Shares | 2026-08-13 | |
| Mega UBS Group AG Bank | $52,932,756 | 1.15% | 1,150,462 | Call | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $51,357,144 | 1.11% | 1,116,217 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $48,277,188 | 1.05% | 1,049,276 | Shares | 2026-08-14 | |
| Small Impala Asset Management LLC | $47,620,350 | 1.03% | 1,035,000 | Shares | 2026-08-17 | |
| Mid Encompass Capital Advisors LLC Registered adviser | $41,409,000 | 0.90% | 900,000 | Shares | 2026-08-14 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $40,067,807 | 0.87% | 870,850 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $39,882,433 | 0.87% | 866,821 | Shares | 2026-08-13 | |
| Large Assenagon Asset Management S.A. | $39,340,352 | 0.85% | 1,093,395 | Shares | 2026-10-15 | |
| Mega Boston Partners Registered adviser | $39,296,910 | 0.85% | 854,095 | Shares | 2026-08-04 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $38,991,588 | 0.85% | 847,459 | Shares | 2026-08-14 | |
| Large Allspring Global Investments Holdings, LLC Holding company | $38,051,696 | 0.83% | 827,031 | Shares | 2026-08-13 | |
| Mega D. E. Shaw & Co., Inc. | $36,611,904 | 0.79% | 795,738 | Shares | 2026-08-14 | |
| Mid Kinetic Partners Management, LP Registered adviser | $35,735,967 | 0.78% | 776,700 | Shares | 2026-08-14 | |
| Large Balyasny Asset Management L.P. Registered adviser | $34,949,334 | 0.76% | 759,603 | Shares | 2026-08-14 | |
| Mid Merewether Investment Management, LP Registered adviser | $31,909,637 | 0.69% | 693,537 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $31,382,268 | 0.68% | 682,075 | Shares | 2026-08-13 | |
| Large Squarepoint Ops LLC Registered adviser | $31,250,222 | 0.68% | 679,205 | Shares | 2026-08-14 | |
| Large Woodline Partners LP Registered adviser | $28,837,779 | 0.63% | 626,772 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $27,708,692 | 0.60% | 602,232 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $27,372,591 | 0.59% | 594,927 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $25,254,795 | 0.55% | 548,898 | Shares | 2026-08-14 | |
| Mid BW Gestao de Investimentos Ltda. | $24,070,683 | 0.52% | 523,162 | Shares | 2026-08-14 | |
| Small Mountaineer Partners Management, LLC Registered adviser | $23,157,247 | 0.50% | 503,309 | Shares | 2026-08-13 | |
| Large Jefferies Financial Group Inc. Holding company | $22,368,911 | 0.49% | 486,175 | Shares | 2026-08-17 | |
| Large Bridgewater Associates, LP Registered adviser | $21,805,427 | 0.47% | 473,928 | Shares | 2026-08-14 | |
| Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser | $20,991,784 | 0.46% | 456,244 | Shares | 2026-08-03 | |
| Large Driehaus Capital Management LLC Registered adviser | $20,979,731 | 0.46% | 455,982 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $20,318,016 | 0.44% | 441,600 | Call | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $19,660,349 | 0.43% | 427,306 | Shares | 2026-08-13 | |
| Large Caption Management, LLC Registered adviser | $19,554,250 | 0.42% | 425,000 | Call | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $18,570,921 | 0.40% | 403,628 | Shares | 2026-08-06 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $18,109,536 | 0.39% | 393,600 | Call | 2026-08-14 | |
| Large VOLORIDGE INVESTMENT MANAGEMENT, LLC Registered adviser | $18,081,423 | 0.39% | 392,989 | Shares | 2026-08-14 | |
| Mega Capital World Investors Adviser | $18,009,096 | 0.39% | 391,417 | Shares | 2026-08-12 | |
| Large ROYCE & ASSOCIATES LP Registered adviser | $17,117,744 | 0.37% | 372,044 | Shares | 2026-08-14 | |
| Mega CANADA PENSION PLAN INVESTMENT BOARD Non-US | $16,812,054 | 0.36% | 365,400 | Shares | 2026-08-14 | |
| Large First Eagle Investment Management, LLC Registered adviser | $16,672,183 | 0.36% | 362,360 | Shares | 2026-08-24 | |
| Large Rokos Capital Management LLP Registered adviser | $16,333,642 | 0.35% | 355,002 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $15,973,105 | 0.35% | 347,166 | Shares | 2026-08-12 | |
| Mega Nuveen, LLC | $15,734,038 | 0.34% | 341,970 | Shares | 2026-08-11 | |
| Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Non-US | $15,022,265 | 0.33% | 326,500 | Shares | 2026-08-13 | |
| Small Steamboat Capital Partners, LLC Registered adviser | $13,649,602 | 0.30% | 296,666 | Shares | 2026-08-14 | |
| Large Point72 Asset Management, L.P. Registered adviser | $13,552,475 | 0.29% | 294,555 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $13,344,325 | 0.29% | 290,031 | Shares | 2026-09-02 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $12,736,809 | 0.28% | 276,827 | Shares | 2026-08-04 | |
| Mid Weiss Asset Management LP Registered adviser | $12,417,224 | 0.27% | 269,881 | Shares | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $12,384,465 | 0.27% | 269,169 | Shares | 2026-08-13 | |
| Mega DEUTSCHE BANK AG\ Non-US | $12,134,032 | 0.26% | 263,726 | Shares | 2026-08-07 | |
| Mid SYSTEMATIC FINANCIAL MANAGEMENT LP Registered adviser | $11,605,975 | 0.25% | 252,249 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $11,465,692 | 0.25% | 249,200 | Put | 2026-08-14 | |
| Large CANADA LIFE ASSURANCE Co | $11,242,359 | 0.24% | 244,346 | Shares | 2026-08-13 | |
| Large CONGRESS ASSET MANAGEMENT CO Registered adviser | $11,185,354 | 0.24% | 310,877 | Shares | 2026-10-06 | |
| Mega BANK OF MONTREAL /CAN/ Bank | $10,515,860 | 0.23% | 228,556 | Shares | 2026-08-12 | |
| Mid Yaupon Capital Management LP Registered adviser | $10,299,844 | 0.22% | 223,861 | Shares | 2026-08-14 | |
| Large Public Sector Pension Investment Board Non-US | $10,260,137 | 0.22% | 222,998 | Shares | 2026-08-13 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $9,760,973 | 0.21% | 212,149 | Shares | 2026-08-14 | |
| Mega BARCLAYS PLC Bank | $9,645,580 | 0.21% | 209,641 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $9,574,681 | 0.21% | 208,100 | Put | 2026-09-02 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $9,281,459 | 0.20% | 201,727 | Shares | 2026-08-11 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $9,114,581 | 0.20% | 198,100 | Put | 2026-08-14 | |
| Mid Nicholas Investment Partners, LP Registered adviser | $9,109,933 | 0.20% | 197,999 | Shares | 2026-08-14 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $8,660,552 | 0.19% | 188,232 | Shares | 2026-08-14 | |
| Small CDC Financial, Inc. | $8,347,594 | 0.18% | 181,430 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $8,253,457 | 0.18% | 179,384 | Shares | 2026-08-14 | |
| Mega VICTORY CAPITAL MANAGEMENT INC Registered adviser | $8,146,944 | 0.18% | 177,069 | Shares | 2026-08-07 | |
| Small Drummond Knight Asset Management Pty Ltd Exempt adviser | $7,466,226 | 0.16% | 162,274 | Shares | 2026-07-15 | |
| Mega Russell Investments Group, Ltd. | $7,255,909 | 0.16% | 157,703 | Shares | 2026-08-06 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $7,094,742 | 0.15% | 154,200 | Call | 2026-09-02 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $7,067,918 | 0.15% | 153,617 | Shares | 2026-08-12 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $6,872,604 | 0.15% | 149,372 | Shares | 2026-08-14 | |
| Mid CSM Advisors, LLC | $6,727,214 | 0.15% | 146,212 | Shares | 2026-08-14 | |
| Small Insight Wealth Strategies, LLC Registered adviser | $6,668,137 | 0.14% | 185,329 | Shares | 2026-10-09 | |
| Mega FRANKLIN RESOURCES INC Adviser | $6,630,589 | 0.14% | 144,112 | Shares | 2026-08-13 | |
| Small ICON ADVISERS INC/CO Registered adviser | $6,464,405 | 0.14% | 140,500 | Shares | 2026-08-13 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $6,455,801 | 0.14% | 140,313 | Shares | 2026-08-14 | |
| Mega Swiss National Bank | $6,167,640 | 0.13% | 134,050 | Shares | 2026-08-11 | |
| Mega NEUBERGER BERMAN GROUP LLC Holding company | $6,161,980 | 0.13% | 133,927 | Shares | 2026-08-13 | |
| Mid BOOTHBAY FUND MANAGEMENT, LLC Registered adviser | $6,140,540 | 0.13% | 133,461 | Shares | 2026-08-14 | |
| Large CIBC WORLD MARKET INC. | $6,082,614 | 0.13% | 132,202 | Shares | 2026-08-13 | |
| Large COHEN & STEERS, INC. Adviser | $5,802,689 | 0.13% | 126,118 | Shares | 2026-08-14 | |
| Large PICTON MAHONEY ASSET MANAGEMENT Non-US | $5,792,751 | 0.13% | 125,902 | Shares | 2026-08-13 | |
| Mega Legal & General Group Plc | $5,662,404 | 0.12% | 123,069 | Shares | 2026-08-14 | |
| Mid RENAISSANCE GROUP LLC Registered adviser | $5,435,943 | 0.12% | 118,147 | Shares | 2026-08-13 | |
| Mega ENVESTNET ASSET MANAGEMENT INC Registered adviser | $5,303,434 | 0.12% | 115,267 | Shares | 2026-09-23 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $5,038,187 | 0.11% | 109,502 | Shares | 2026-08-14 | |
| Mid Cinctive Capital Management LP Registered adviser | $4,932,318 | 0.11% | 107,201 | Shares | 2026-08-14 | |
| Large BESSEMER GROUP INC | $4,715,840 | 0.10% | 102,496 | Shares | 2026-08-12 | |
| Mega RAYMOND JAMES FINANCIAL INC | $4,666,379 | 0.10% | 101,421 | Shares | 2026-08-14 |
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