Century Aluminum Company (CENX) Ownership
CENX ownership summary
as of October 17, 2026- Institutions
- 77.9% of shares outstanding
- Insiders
- 30.89% of shares outstanding
- Shares outstanding
- 99.0M
- Float
- 68.6M shares available to trade
- Short interest
- 13.36% 9.2M shares short
- Days to cover
- 5.46 short interest down 5.4% vs prior month
- Institutions 77.89%
- Insiders 30.89%
CENX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Glencore PLC | 29.99% | 29.7M | $1.04B | — | June 30, 2026 |
| 2 | BlackRock Inc | 10.41% | 10.3M | $361.0M | +1.3M (+14.4%) | June 30, 2026 |
| 3 | State Street Corp | 5.60% | 5.5M | $194.2M | +875,180 (+18.8%) | June 30, 2026 |
| 4 | Vanguard Portfolio Management, LLC | 4.82% | 4.8M | $167.2M | +532,163 (+12.5%) | June 30, 2026 |
| 5 | Assenagon Asset Management SA | 3.09% | 3.1M | $107.3M | +1.2M (+67.3%) | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 3.00% | 3.0M | $104.1M | +386,425 (+14.9%) | June 30, 2026 |
| 7 | Amvescap Plc. | 2.44% | 2.4M | $84.7M | +341,266 (+16.4%) | June 30, 2026 |
| 8 | Sourcerock Group LLC | 2.29% | 2.3M | $79.4M | −421,164 (−15.7%) | June 30, 2026 |
| 9 | Dimensional Fund Advisors, Inc. | 2.23% | 2.2M | $77.5M | +20,580 (+0.9%) | June 30, 2026 |
| 10 | FMR Inc | 1.98% | 2.0M | $68.7M | −699,701 (−26.3%) | June 30, 2026 |
| 11 | Geode Capital Management, LLC | 1.87% | 1.8M | $64.7M | +306,588 (+19.9%) | June 30, 2026 |
| 12 | Fisher Asset Management, LLC | 1.55% | 1.5M | $53.8M | +683,104 (+80.2%) | June 30, 2026 |
| 13 | Morgan Stanley - Brokerage Accounts | 1.53% | 1.5M | $52.9M | −74,474 (−4.7%) | June 30, 2026 |
| 14 | Millennium Management LLC | 1.13% | 1.1M | $39.1M | −871,408 (−43.8%) | June 30, 2026 |
| 15 | The Goldman Sachs Group Inc | 1.06% | 1.0M | $36.8M | +670,128 (+176.7%) | June 30, 2026 |
| 16 | Impala Asset Management LLC | 1.05% | 1.0M | $36.3M | +60,000 (+6.2%) | June 30, 2026 |
| 17 | Encompass Capital Advisors LLC | 0.91% | 900K | $31.5M | −651,362 (−42.0%) | June 30, 2026 |
| 18 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.88% | 871K | $30.5M | +70,719 (+8.8%) | June 30, 2026 |
| 19 | UBS Group AG | 0.88% | 867K | $30.4M | +280,055 (+47.7%) | June 30, 2026 |
| 20 | Boston Partners Global Investors, Inc | 0.86% | 854K | $29.9M | +544,199 (+175.6%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 7.3M shares and 5 cut 2.7M.
CENX top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 4.11% | 4.1M | $142.5M | +960 (+0.0%) | September 30, 2026 |
| 2 | Stt Strt®SPDR®S&P®Mtls &MngETF | 2.63% | 2.6M | $91.1M | +26,328 (+1.0%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 2.23% | 2.2M | $77.2M | −3,024 (−0.1%) | August 31, 2026 |
| 4 | iShares Russell 2000 ETF | 1.84% | 1.8M | $63.7M | −20,992 (−1.1%) | September 30, 2026 |
| 5 | Vanguard Small Cap Index | 1.61% | 1.6M | $55.8M | −139 (−0.0%) | August 31, 2026 |
| 6 | Global X US Infrastructure Dev ETF | 0.96% | 948K | $33.2M | +6,660 (+0.7%) | September 30, 2026 |
| 7 | Multipartner Konwave Transtn Mtls C CHF | 0.96% | 947K | $33.2M | +30,000 (+3.3%) | August 31, 2026 |
| 8 | Vanguard MStar Small Cap Growth Indx Inv | 0.93% | 917K | $32.1M | −6,124 (−0.7%) | August 31, 2026 |
| 9 | Fidelity Small Cap Index | 0.77% | 767K | $26.9M | +6,675 (+0.9%) | July 31, 2026 |
| 10 | Invesco Discovery A | 0.75% | 739K | $25.9M | −650,707 (−46.8%) | August 31, 2026 |
| 11 | iShares Russell 2000 Growth ETF | 0.66% | 657K | $23.0M | −832 (−0.1%) | September 30, 2026 |
| 12 | State Street SPDR Port S&P 600 Sm CpETF | 0.63% | 625K | $21.9M | — | September 30, 2026 |
| 13 | FI Instl US Sm & Md-Cp Cor Eq USD | 0.61% | 603K | $21.1M | +224,113 (+59.1%) | August 31, 2026 |
| 14 | Bakersteel Glb Fds SICAV– Elctm I2 EUR | 0.48% | 474K | $16.6M | +80,600 (+20.5%) | August 31, 2026 |
| 15 | Vanguard Strategic Equity Inv | 0.45% | 449K | $15.7M | −88,807 (−16.5%) | June 30, 2026 |
| 16 | Jupiter Merian Glb Eq Abs Rt I USD Acc | 0.43% | 428K | $15.0M | +427,885 (0.0%) | December 31, 2025 |
| 17 | DFA US Small Cap I | 0.42% | 415K | $14.5M | — | August 31, 2026 |
| 18 | Vanguard Russell 2000 ETF | 0.41% | 403K | $14.1M | +9,492 (+2.4%) | August 31, 2026 |
| 19 | First Eagle Small Cap Opportunity I | 0.39% | 389K | $13.6M | — | August 31, 2026 |
| 20 | iShares S&P Small-Cap 600 Growth ETF | 0.39% | 386K | $13.5M | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
CENX insider transactions
latest 9| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-16 | Jesse E Gary | Sell | $55.47 | 150,000 | $8.3M |
| 2026-03-11 | Robert F Hoffman | Sell | $56.51 | 10,529 | $594,994 |
| 2026-03-04 | Robert F Hoffman | Sell | $56.33 | 10,000 | $563,300 |
| 2026-03-03 | Matt Aboud | Sell | $52.67 | 2,971 | $156,483 |
| 2026-03-02 | Matt Aboud | Sell | $52.50 | 12,126 | $636,615 |
| 2026-02-23 | John Dezee | Sell | $50.72 | 66,000 | $3.3M |
| 2026-01-23 | Jesse E Gary | Sell | $48.19 | 150,000 | $7.2M |
| 2025-09-26 | Agust F Hafberg | Sell | $27.91 | 9,493 | $264,950 |
| 2025-08-12 | Matt Aboud | Sell | $23.27 | 12,027 | $279,868 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
CENX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CENX
Institutional investors own 77.9% of Century Aluminum's shares and insiders 30.89%. The largest holder is Glencore PLC with 29.99% of the shares (29.7M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 5 reduced their stake in the latest filings. Short interest is 13.36% of the float, or 5.46 days of average trading volume. The share count rose 9.4% since 2014.
Related: CENX analyst forecast, CENX key metrics. See the CENX stock overview for the latest quote and news.
CENX ownership FAQ
Who owns the most Century Aluminum stock?
The largest shareholders of Century Aluminum are Glencore PLC (29.99%), BlackRock Inc (10.41%), State Street Corp (5.60%), Vanguard Portfolio Management, LLC (4.82%), Assenagon Asset Management SA (3.09%).
What percentage of Century Aluminum is owned by institutions?
Institutions hold 77.9% of Century Aluminum's shares outstanding; insiders hold 30.89%.
Which funds own Century Aluminum?
The largest fund holders of Century Aluminum are iShares Core S&P Small-Cap ETF (4.11%), Stt Strt®SPDR®S&P®Mtls &MngETF (2.63%), Vanguard MStar Total Stk Mkt Idx Invest (2.23%), iShares Russell 2000 ETF (1.84%), Vanguard Small Cap Index (1.61%).
What is Century Aluminum's short interest?
9.2M shares of Century Aluminum were sold short, 13.36% of the float; at the average daily volume it would take 5.46 days to cover.
Are insiders buying or selling Century Aluminum?
Of the latest 9 reported insider transactions in Century Aluminum (since August 12, 2025), 0 were purchases and 9 were sales.
How many shares of Century Aluminum are outstanding?
Century Aluminum has 99.0M shares outstanding, of which 68.6M are in the public float.