Latest Period
Q1 2026
Security Snapshot
CENTURY ALUMINUM CO - Common Stock (CENX) Institutional Ownership
CUSIP: 156431108
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
381
Shares (Excl. Options)
100,522,765
Price
$58.69
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- Security type / class
- Equity / Common Stock
- Symbol
- CENX on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 100,522,765
- Total 13F value
- $5,896,306,586
- Portfolio coverage rank
- 0.02%
- Share change
- +520,961
- Value change
- +$72,379,091
- Number of holders
- 381
- Shares outstanding
- 99,220,963
- SEC-reported price per share
- $63.27
- Insider filing price
- $63.27
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CENX - CENTURY ALUMINUM CO - Common Stock is tracked under CUSIP 156431108.
- 381 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 324 to 381 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $3,911,983,518 to $5,896,306,586.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 381 institutions filings for Q1 2026.
Security key
156431108
Latest holder period
Q1 2026
13F holders
381
13D/G owners
2
CIK / CUSIP context first
Open Q1 2026 holders
CENX full holder history
CENTURY ALUMINUM CO SEC filings
CENTURY ALUMINUM CO company facts
CENTURY ALUMINUM CO insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 156431108:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
CENX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| GLENCORE INTERNATIONAL AG | 30% | -18% | $1,499,677,358 | -$318,983,025 | 29,690,702 | -18% | Glencore International AG | 04 Mar 2026 |
| BlackRock, Inc. | 8.2% | -11% | $477,508,824 | -$22,453,855 | 8,136,119 | -4.5% | BlackRock, Inc. | 31 Mar 2026 |
As of 31 Mar 2026, 381 institutional investors reported holding 100,522,765 shares of CENTURY ALUMINUM CO - Common Stock (CENX). This represents 101% of the company’s total 99,220,963 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
79%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Glencore plc | 30% | 29,690,702 | -18% | 29% | $1,742,547,300 |
| BlackRock, Inc. | 9.1% | 9,010,379 | -5% | 0.01% | $528,819,144 |
| STATE STREET CORP | 4.7% | 4,667,540 | +8.7% | 0.01% | $273,937,923 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.3% | 4,241,557 | 0% | 0.01% | $248,936,980 |
| Sourcerock Group LLC | 2.7% | 2,687,249 | -26% | 6.6% | $157,714,644 |
| FMR LLC | 2.7% | 2,660,054 | +30454% | 0.01% | $156,118,594 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.6% | 2,586,107 | 0% | 0% | $151,778,620 |
| DIMENSIONAL FUND ADVISORS LP | 2.2% | 2,190,922 | -21% | 0.03% | $128,552,239 |
| Invesco Ltd. | 2.1% | 2,076,528 | +230% | 0.02% | $121,871,428 |
| MILLENNIUM MANAGEMENT LLC | 2% | 1,987,625 | +40% | 0.09% | $116,653,711 |
| Assenagon Asset Management S.A. | 1.8% | 1,830,324 | +110% | 0.17% | $107,421,716 |
| MORGAN STANLEY | 1.6% | 1,585,229 | -1.5% | 0.01% | $93,037,140 |
| Encompass Capital Advisors LLC | 1.6% | 1,551,362 | +210% | 3.7% | $91,049,436 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.6% | 1,540,212 | +17% | 0.01% | $90,414,207 |
| D. E. Shaw & Co., Inc. | 1.4% | 1,433,369 | +20% | 0.07% | $84,124,427 |
| JANE STREET GROUP, LLC | 1.3% | 1,320,942 | +3082% | 0.08% | $77,526,086 |
| CITADEL ADVISORS LLC | 1.3% | 1,320,867 | +89% | 0.05% | $77,521,684 |
| Impala Asset Management LLC | 0.98% | 975,000 | +14% | 27% | $57,222,750 |
| Fisher Asset Management, LLC | 0.86% | 851,301 | -1.8% | 0.02% | $49,962,854 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.81% | 800,131 | -46% | 0.06% | $46,949,162 |
| Bridgewater Associates, LP | 0.74% | 732,517 | +170% | 0.19% | $42,991,423 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | 0.73% | 720,735 | -23% | 0.17% | $42,299,937 |
| BANK OF AMERICA CORP /DE/ | 0.61% | 608,794 | +98% | 0% | $35,730,120 |
| DEUTSCHE BANK AG\ | 0.6% | 598,025 | +452% | 0.01% | $35,098,088 |
| Qube Research & Technologies Ltd | 0.59% | 589,928 | -19% | 0.05% | $34,622,874 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 100,522,765 | $5,896,306,586 | +$72,379,091 | $58.69 | 381 |
| 2025 Q4 | 99,819,488 | $3,911,983,518 | +$124,163,922 | $39.18 | 324 |
| 2025 Q3 | 96,520,734 | $2,832,919,432 | +$54,258,975 | $29.36 | 255 |
| 2025 Q2 | 95,594,768 | $1,722,575,922 | +$58,549,617 | $18.02 | 221 |
| 2025 Q1 | 92,511,819 | $1,716,528,646 | -$3,114,737 | $18.56 | 217 |
| 2024 Q4 | 92,433,106 | $1,684,095,771 | -$45,584,471 | $18.22 | 222 |
| 2024 Q3 | 54,982,920 | $892,385,432 | -$17,861,815 | $16.23 | 197 |
| 2024 Q2 | 55,165,067 | $924,028,152 | +$5,083,622 | $16.75 | 189 |
| 2024 Q1 | 53,186,853 | $818,595,289 | -$54,547,870 | $15.39 | 178 |
| 2023 Q4 | 57,092,682 | $693,185,877 | +$56,762,207 | $12.14 | 165 |
| 2023 Q3 | 52,595,437 | $378,191,182 | +$17,142,405 | $7.19 | 159 |
| 2023 Q2 | 50,261,595 | $438,460,841 | -$16,970,556 | $8.72 | 157 |
| 2023 Q1 | 51,654,253 | $516,526,137 | +$5,811,062 | $10.00 | 163 |
| 2022 Q4 | 51,744,904 | $423,304,619 | +$16,034,550 | $8.18 | 160 |
| 2022 Q3 | 50,143,413 | $264,759,854 | -$33,619,343 | $5.28 | 156 |
| 2022 Q2 | 56,463,368 | $415,838,293 | -$64,301,856 | $7.37 | 162 |
| 2022 Q1 | 52,648,683 | $1,385,786,059 | +$18,694,939 | $26.31 | 186 |
| 2021 Q4 | 50,838,654 | $840,301,415 | +$20,000,920 | $16.56 | 156 |
| 2021 Q3 | 50,174,754 | $674,836,148 | -$25,939,252 | $13.45 | 142 |
| 2021 Q2 | 52,238,880 | $673,252,200 | +$61,029,565 | $12.89 | 141 |
| 2021 Q1 | 46,669,039 | $823,272,221 | +$16,544,644 | $17.66 | 136 |
| 2020 Q4 | 46,583,401 | $513,831,108 | -$5,554,984 | $11.03 | 127 |
| 2020 Q3 | 48,246,723 | $343,504,916 | +$18,698,921 | $7.12 | 123 |
| 2020 Q2 | 45,432,752 | $323,934,353 | +$1,534,348 | $7.13 | 111 |
| 2020 Q1 | 46,359,225 | $167,793,339 | -$17,604,120 | $3.62 | 122 |