Century Aluminum

CENX • NASDAQ

Century Aluminum is a aluminum company in the basic materials sector on NASDAQ, led by Michael A. Bless, with a market cap of $2.9B. As of Q3 2025, 103% of shares are held by 253 institutional investors, with Glencore plc as the largest holder at 42.92%.

President and Chief Executive OfficerMichael A. Bless

Market Cap$2.9B

Aluminum

Basic Materials

Employees2.9K

Websitecenturyaluminum.com

Country

United States of America

Overview

Overview of institutional ownership in CENX as of Q3 2025 with a market cap of $2.7B

All Institutions

Institutions: 253
Value Held: $2.8B
Shares Held: 96.5M
Avg Position: $11.2M
Median Position: $725.2K

Hedge Funds

Hedge Funds: 42
Value Held: $306.2M
Shares Held: 10.4M
Avg Position: $7.3M
Median Position: $1.8M

Ownership Breakdown

Institutional (non-HF)

92.15%

$2.5B

Hedge Funds

11.17%

$306.2M

Retail & Other

Based on market cap of $2.7B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in CENX as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
G Glencore plc Institution	-	$1.2B 29.67% of portfolio	42.92% 40.1M shares	Q4 2024 Held for 11 months	$4.0B
B BlackRock, Inc. Institution	-	$297.4M 0.01% of portfolio	10.85% 10.1M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$171.6M 0.00% of portfolio	6.26% 5.8M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$123.8M 0.00% of portfolio	4.52% 4.2M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$89.9M 0.02% of portfolio	3.28% 3.1M shares	≤ Q2 2013 Held for 12y 5m+	$466.32B
Sourcerock Group LLC Hedge Fund•Long/Short	Andrew Michael Haley COO	$77.5M 5.27% of portfolio	2.83% 2.6M shares	Q3 2024 Held for 1y 2m	$1.5B
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	Kenneth Cordele Griffin CEO	$44.2M 0.04% of portfolio	1.61% 1.5M shares	≤ Q2 2013 Held for 12y 5m+	$122.08B
M MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Institution	-	$42.8M 0.07% of portfolio	1.56% 1.5M shares	Q2 2024 Held for 1y 5m	$61.8B
MORGAN STANLEY RIA/Wealth	Jed Finn CEO	$42.1M 0.00% of portfolio	1.53% 1.4M shares	Q3 2013 Held for 12y 2m	$1.65T
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$38.7M 0.00% of portfolio	1.41% 1.3M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T

Net Capital Flow

Institutional buying and selling activity for CENX in Q3 2025

Traded: +$51.6M
Buyers: 148
Sellers: 111
Total Bought: +$291.3M
Total Sold: −$239.7M
Avg Position: $9.9M

Biggest Buyers

Institution	Net Bought	Current Position
Sourcerock Group LLC Hedge Fund•Long/Short	+$35.7M +1.2M shares	$77.5M 2.6M shares
Encompass Capital Advisors LLC Hedge Fund•Long/Short	+$20.7M +706.6K shares	$23.8M 811.2K shares
A AMERICAN CENTURY COMPANIES INC Institution	+$18.0M +611.8K shares	$22.5M 767.7K shares
MORGAN STANLEY RIA/Wealth	+$17.2M +584.4K shares	$42.1M 1.4M shares
STATE STREET CORP Institution	+$16.2M +552.3K shares	$123.8M 4.2M shares
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	+$14.0M +475.9K shares	$25.2M 859.9K shares
GOLDMAN SACHS GROUP INC Institution	+$9.6M +325.4K shares	$16.2M 550.1K shares
Invesco Ltd. ETF Provider	+$9.2M +312.1K shares	$24.9M 849.5K shares
Q Qube Research & Technologies Ltd Institution	+$8.3M +282.0K shares	$24.2M 823.1K shares
S Steamboat Capital Partners, LLC Hedge Fund•Long/Short	+$8.2M +280.5K shares	$13.9M 471.9K shares

Biggest Sellers

Institution	Net Sold	Current Position
WEXFORD CAPITAL LP Hedge Fund•Multi-Strategy	−$37.3M −1.3M shares	$6.1M 206.5K shares
Woodline Partners LP Hedge Fund•Long/Short	−$31.4M −1.1M shares	$6.5M 220.3K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	−$23.1M −787.5K shares	$5.7M 194.1K shares
BANK OF AMERICA CORP /DE/ Institution	−$17.8M −605.2K shares	$11.7M 397.2K shares
Robeco Investment Management, Inc. Long Only Manager	−$17.4M −594.0K shares	$33.5M 1.1M shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	−$12.2M −417.0K shares	$44.2M 1.5M shares
Marshall Wace LLP Institution	−$9.4M −521.6K shares	Sold Off 0 shares
S Squarepoint Ops LLC Hedge Fund•Quant	−$6.1M −208.0K shares	$1.3M 44.3K shares
Verition Fund Management LLC Hedge Fund•Multi-Strategy	−$5.9M −201.1K shares	$2.4M 83.3K shares
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$4.5M −247.1K shares	Sold Off 0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited CENX in Q3 2025

New Positions: 25
New Value: $17.2M
Exited Positions: 32
Exited Value: $40.9M

New Positions

Institution	Position Value
I Invenomic Capital Management LP Hedge Fund•Long/Short	$4.6M 155.3K shares
A Amitell Capital Pte Ltd Institution	$3.2M 108.0K shares
Voleon Capital Management LP Hedge Fund•Quant	$2.0M 68.0K shares
N New Century Financial Group, LLC RIA/Wealth	$987.2K 33.6K shares
O OMERS ADMINISTRATION Corp Institution	$883.7K 30.1K shares
E Entropy Technologies, LP Hedge Fund•Quant Macro	$767.0K 26.1K shares
PFG Advisors RIA/Wealth	$760.7K 25.9K shares
CenterBook Partners LP Hedge Fund•Market Neutral	$704.7K 24.0K shares
Sheets Smith Investment Management RIA/Wealth	$651.7K 22.2K shares
Scientech Research LLC Hedge Fund•Market Neutral	$518.5K 17.7K shares

Exited Positions

Institution	Previous Position
Marshall Wace LLP Institution	$9.4M 521.6K shares
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$4.5M 247.1K shares
B Bastion Asset Management Inc. Institution	$4.3M 239.5K shares
JACOBS LEVY EQUITY MANAGEMENT, INC Hedge Fund•Quant	$3.4M 190.7K shares
S Soviero Asset Management, LP Hedge Fund•Long/Short	$3.4M 190.0K shares
A ANTIPODES PARTNERS Ltd Hedge Fund•Long/Short	$2.8M 153.1K shares
SummitTX Capital, L.P. Hedge Fund•Multi-Strategy	$2.6M 143.1K shares
T TEXAS PERMANENT SCHOOL FUND Institution	$2.2M 119.8K shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	$1.5M 81.8K shares
D Dynamic Technology Lab Private Ltd Institution	$875.8K 48.6K shares

Options Activity

Institutions with the largest Call and Put options positions in CENX as of Q3 2025

Call Positions: 14
Call Value: $117.4M
Put Positions: 11
Put Value: $53.5M

Call Positions

Institution	Position Value
UBS Group AG Institution	$41.1M 14.0K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$37.2M 12.7K contracts
P PEAK6 LLC Institution	$19.4M 6.6K contracts
J JANE STREET GROUP, LLC Institution	$4.7M 1.6K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$4.6M 1.6K contracts
BANK OF AMERICA CORP /DE/ Institution	$2.5M 861.0 contracts
Caption Management, LLC Hedge Fund•Long/Short	$2.3M 800.0 contracts
W WOLVERINE TRADING, LLC Institution	$1.9M 638.0 contracts
P Parallax Volatility Advisers, LLC Hedge Fund•Vol Arbitrage	$1.7M 593.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$1.4M 471.0 contracts

Put Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$20.8M 7.1K contracts
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	$15.9M 5.4K contracts
P PEAK6 LLC Institution	$7.6M 2.6K contracts
J JANE STREET GROUP, LLC Institution	$3.3M 1.1K contracts
BANK OF AMERICA CORP /DE/ Institution	$3.0M 1.0K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$1.2M 400.0 contracts
W WOLVERINE TRADING, LLC Institution	$764.3K 260.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$601.9K 205.0 contracts
Walleye Trading LLC RIA/Wealth	$267.2K 91.0 contracts
WOLVERINE ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$11.7K 4.0 contracts

Most Committed Institutions

Institutions with CENX as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
G Glencore plc Institution	-	29.67% $1.2B	42.92% 40.1M shares	Q4 2024 Held for 11 months	$4.0B
I Impala Asset Management LLC Hedge Fund•Long/Short	Robert James Bishop CEO	14.87% $20.2M	0.74% 689.0K shares	Q4 2023 Held for 1y 11m	$136.0M
Mountaineer Partners Management, LLC Hedge Fund•Long/Short	Mark M Lee Managing Partner	11.29% $19.4M	0.71% 661.0K shares	Q4 2022 Held for 2y 11m	$171.9M
Sourcerock Group LLC Hedge Fund•Long/Short	Andrew Michael Haley COO	5.27% $77.5M	2.83% 2.6M shares	Q3 2024 Held for 1y 2m	$1.5B
S Steamboat Capital Partners, LLC Hedge Fund•Long/Short	Parsa Nmn Kiai Managing Partner	3.61% $13.9M	0.51% 471.9K shares	Q4 2023 Held for 1y 11m	$384.1M
A Amitell Capital Pte Ltd Institution	-	2.34% $3.2M	0.12% 108.0K shares	Q3 2025 Held for 2 months	$135.2M
H Hartree Partners, LP Institution	-	2.23% $6.4M	0.23% 217.8K shares	Q2 2024 Held for 1y 5m	$287.0M
Monaco Asset Management SAM RIA/Wealth	Kirstin Lynn Hark Director	1.93% $5.0M	0.18% 168.8K shares	Q1 2025 Held for 8 months	$256.5M
WEXFORD CAPITAL LP Hedge Fund•Multi-Strategy	Charles Eugene Davidson Chairman	1.84% $6.1M	0.22% 206.5K shares	Q1 2025 Held for 8 months	$330.0M
N New Century Financial Group, LLC RIA/Wealth	Jon Paul Brouard President	1.75% $987.2K	0.04% 33.6K shares	Q3 2025 Held for 2 months	$56.3M

Hedge Fund Spotlight

Discover hedge funds investing in CENX

CITADEL ADVISORS LLC

Hedge Fund • Multi-Strategy

Portfolio ManagerKenneth Cordele Griffin

Portfolio Value: $122.08B
Positions: 5,531
Last Reported: Q3 2025

Sector Allocation

Position in Century Aluminum

Market Value: $44.2M
Shares Held: 1.5M
Portfolio Weight: 0.04%
Owned Since: 2013-Q2

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