Security Snapshot

CENTURY ALUMINUM CO - Common Stock (CENX) Institutional Ownership

CUSIP: 156431108

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

323

Shares (Excl. Options)

99,819,467

Price

$39.18

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Type / Class
Equity / Common Stock
Symbol
CENX on Nasdaq
Shares outstanding
99,220,963
Price per share
$67.94
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
99,819,467
Total reported value
$3,911,982,695
% of total 13F portfolios
0.01%
Share change
+2,958,400
Value change
+$124,163,883
Number of holders
323
Price from insider filings
$67.94
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Quick Takeaways

  • CENX - CENTURY ALUMINUM CO - Common Stock is tracked under CUSIP 156431108.
  • 323 institutions reported positions in Q4 2025.
  • 2 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 323 to 192 between Q4 2025 and Q1 2026.
  • Reported value moved from $3,911,982,695 to $3,114,873,560.

Why This Matters

  • 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.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 323 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 156431108?
CUSIP 156431108 identifies CENX - CENTURY ALUMINUM CO - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

Significant Owners of CENTURY ALUMINUM CO - Common Stock (CENX) based on Schedule 13D/G filings

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 Dec 2025, 323 institutional investors reported holding 99,819,467 shares of CENTURY ALUMINUM CO - Common Stock (CENX). This represents 101% of the company’s total 99,220,963 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of CENTURY ALUMINUM CO - Common Stock (CENX) together control 82% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Glencore plc 36% 36,005,947 -10% 33% $1,410,713,003
BlackRock, Inc. 9.6% 9,484,567 -6.4% 0.01% $371,605,334
VANGUARD GROUP INC 7% 6,939,794 +19% 0% $271,901,129
STATE STREET CORP 4.3% 4,295,711 +1.8% 0.01% $168,305,957
Sourcerock Group LLC 3.7% 3,621,984 +37% 8.1% $141,909,333
DIMENSIONAL FUND ADVISORS LP 2.8% 2,765,132 -9.7% 0.02% $108,340,758
MORGAN STANLEY 1.6% 1,609,093 +12% 0% $63,044,358
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 1.5% 1,493,823 +2.5% 0.09% $58,529,407
MILLENNIUM MANAGEMENT LLC 1.4% 1,418,032 +220% 0.04% $55,558,494
GEODE CAPITAL MANAGEMENT, LLC 1.3% 1,318,503 -0.04% 0% $51,666,602
D. E. Shaw & Co., Inc. 1.2% 1,190,937 +491% 0.04% $46,660,911
UBS Group AG 1.1% 1,111,273 +134% 0.01% $43,539,676
AMERICAN CENTURY COMPANIES INC 0.98% 974,241 +27% 0.02% $38,170,763
VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.95% 940,325 +18% 0.13% $36,841,934
Assenagon Asset Management S.A. 0.88% 872,753 +114% 0.05% $34,194,463
Fisher Asset Management, LLC 0.87% 866,944 -10% 0.01% $33,966,865
Impala Asset Management LLC 0.86% 857,805 +24% 21% $33,608,800
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.75% 747,087 -13% 0.01% $29,270,868
Qube Research & Technologies Ltd 0.73% 726,192 -12% 0.04% $28,452,203
CITADEL ADVISORS LLC 0.7% 697,217 -54% 0.02% $27,316,962
GOLDMAN SACHS GROUP INC 0.67% 665,702 +21% 0% $26,082,204
Invesco Ltd. 0.63% 629,412 -26% 0% $24,660,362
Mountaineer Partners Management, LLC 0.61% 608,475 -8% 13% $23,840,050
Boston Partners 0.6% 600,237 -47% 0.02% $23,523,006
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.54% 535,924 -1.2% 0% $20,997,502

Institutional Holders of CENTURY ALUMINUM CO - Common Stock (CENX) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 53,029,240 $3,114,873,560 -$233,064,354 $58.69 192
2025 Q4 99,819,467 $3,911,982,695 +$124,163,883 $39.18 323
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
2019 Q4 49,723,997 $373,606,891 +$20,107,244 $7.51 132
2019 Q3 47,024,855 $311,971,810 -$7,402,964 $6.64 133
2019 Q2 48,135,626 $332,614,941 +$5,598,502 $6.91 137
2019 Q1 47,471,867 $421,525,789 -$15,020,761 $8.88 141
2018 Q4 49,277,003 $360,240,558 -$17,835,973 $7.31 144
2018 Q3 50,459,999 $603,866,284 -$8,002,547 $11.97 150
2018 Q2 49,355,573 $777,276,169 -$32,208,706 $15.75 150
2018 Q1 51,523,832 $852,286,389 -$101,838,614 $16.54 158
2017 Q4 57,075,678 $1,121,161,668 -$33,600,756 $19.64 145
2017 Q3 59,370,206 $984,649,332 +$13,129,672 $16.58 158
2017 Q2 58,696,246 $914,603,288 +$18,621,099 $15.58 150
2017 Q1 58,056,533 $736,803,172 +$107,898,600 $12.69 143
2016 Q4 55,989,364 $480,453,721 +$46,404,879 $8.56 145
2016 Q3 51,001,816 $354,255,220 +$16,458,457 $6.95 134
2016 Q2 48,855,195 $309,286,894 -$1,927,294 $6.33 145
2016 Q1 48,978,483 $345,311,292 -$2,292,504 $7.05 146
2015 Q4 52,801,237 $233,407,962 -$35,637,931 $4.42 142
2015 Q3 58,971,650 $271,162,133 -$44,054,832 $4.60 150
2015 Q2 62,453,868 $651,408,454 +$44,932,394 $10.43 186
2015 Q1 56,626,297 $781,437,031 +$40,873,055 $13.80 180
2014 Q4 52,181,916 $1,273,043,279 +$31,303,929 $24.40 191
2014 Q3 50,804,708 $1,319,280,118 +$48,354,084 $25.97 186
2014 Q2 49,542,974 $776,804,823 +$25,470,586 $15.68 138
2014 Q1 47,311,000 $624,889,932 +$22,609,882 $13.21 119
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