CENX Institutional Ownership
Who owns Century Aluminum Co and what the big funds did with it last quarter, from every SEC 13F filing. 417 funds reported holding CENX at Jun 30, 2026, together owning 107.2% of the company.
- ▲260 buying vs 171 selling
- ▲Held by funds +5.2 pts
- ▲Funds holding +27
- ▼Superinvestors: 0 added, 5 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 417 | 390 | +6.9% |
| In funds' top 10 | 8 | 13 | −38.5% |
| 13F shares | 106M | 101M | +5.1% |
| Held by funds | 107.2% | 102.0% | +5.2 pts |
| New positions | 87 | 100 | −13.0% |
| Increased | 173 | 130 | +33.1% |
| Reduced | 111 | 123 | −9.8% |
| Sold out | 60 | 41 | +46.3% |
| Calls (shares) | 584K | 540K | +8.2% |
| Puts (shares) | 120K | 111K | +7.6% |
| Put/call ratio | 0.21 | 0.20 | +1.9% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in CENX
All superinvestors →
Who owns CENX
share of fund held shares- Index and passive funds30.5%
- Active managers and hedge funds60.5%
- Banks and brokers7.3%
- Pensions, insurers and other1.7%
The top 10 holders own 61.4% of all CENX shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
94 funds changed their position- Assenagon Asset Management S.A.Trimmed−2M sh
- Principal Financial Group IncAdded+404K sh
- Counterpoint Mutual Funds LLCSold out−167K sh
- Drummond Knight Asset Management Pty LtdSold out−162K sh
- BI Asset Management Fondsmaeglerselskab A/SAdded+163K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Glencore plc | 29.99% | 29.7M | $1.4B | 0 |
| 2 | BlackRock, Inc. | 10.41% | 10.3M | $474M | +1.3M |
| 3 | State Street Corp | 5.60% | 5.5M | $255M | +875K |
| 4 | Vanguard Portfolio Management LLC | 4.82% | 4.8M | $220M | +532K |
| 5 | Assenagon Asset Management S.A. | 3.09% | 3.1M | $141M | +1.2M |
| 6 | Vanguard Capital Management LLC | 3.00% | 3M | $137M | +386K |
| 7 | Invesco Ltd. | 2.44% | 2.4M | $111M | +341K |
| 8 | Sourcerock Group LLC | 2.29% | 2.3M | $104M | −421K |
| 9 | Dimensional Fund Advisors LP | 2.23% | 2.2M | $102M | +21K |
| 10 | Fmr LLC | 1.98% | 2M | $90.2M | −700K |
- BlackRock, Inc.+1.3M sh+$59.6M
- Assenagon Asset Management S.A.+1.2M sh+$56.7M
- State Street Corp+875K sh+$40.3M
- Fisher Asset Management, LLC+683K sh+$31.4M
- Goldman Sachs Group Inc+670K sh+$30.8M
- Balyasny Asset Management L.P.+665K sh+$30.6M
- Woodline Partners LP+627K sh+$28.8M
- First Eagle Investment Management, LLC+562K sh+$25.8M
- Jane Street Group, LLC−1.2M sh−$57M
- Citadel Advisors LLC−1M sh−$47.4M
- Millennium Management LLC−871K sh−$40.1M
- Fmr LLC−700K sh−$32.2M
- Bornite Capital Management LP−542K sh−$31.8M
- Encompass Capital Advisors LLC−651K sh−$30M
- D. E. Shaw & Co., Inc.−638K sh−$29.3M
- Sourcerock Group LLC−421K sh−$19.4M
CENX institutional ownership FAQ
Who owns the most CENX stock?
In Q2 2026 13F filings the largest holder of CENX was Glencore plc, followed by BlackRock, Inc. and State Street Corp. Index fund managers are usually the biggest holders of large companies.
What percentage of CENX is owned by institutions?
Funds that file 13F reports held 107.2% of CENX's shares at Jun 30, 2026, compared with 102.0% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying CENX?
In Q2 2026, 260 funds bought CENX (87 of them new positions) and 171 sold (60 sold out completely). Among well known investors, 0 added and 5 cut. Our fund sentiment for CENX is bullish.
What is CENX's institutional put/call ratio?
Funds reported $5.5M of CENX puts against $26.7M of calls, a put/call ratio of 0.21 (0.20 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this CENX ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.