DOSSIER · 13F Holders · Q3 2026Basic Materials · Primary Production of Aluminum
CENX

CENTURY ALUM CO

423 institutions still hold CENTURY ALUM CO as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 156431108·Primary Production of Aluminum·423 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$3.2B
visible holders
Holders
423
filers reporting
Concentration
32.89%
Glencore plc #1
top holder share
AI Holders Summary · Q3 2026

423 institutions reported CENX in Q3 2026. Glencore plc leads at 32.9% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Glencore plc
CIK 0001521365
$1.1B29.7M23.34%Q3 2026
02
BlackRock, Inc.
CIK 0002012383
$474M10.3M0.01%Q2 2026
03
STATE STREET CORP
CIK 0000093751
$255M5.5M0.01%Q2 2026
04
Vanguard Portfolio Management
CIK 0002100121· Index
$220M4.8M0.01%Q2 2026
05
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$137M3.0M0.00%Q2 2026
06
Invesco Ltd.
CIK 0000914208
$111M2.4M0.01%Q2 2026
07
Sourcerock Group LLC
CIK 0001822531
$104M2.3M5.42%Q2 2026
08
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$102M2.2M0.02%Q2 2026
09
UBS Group AG
CIK 0001610520
$93M2.0M0.01%Q2 2026
10
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$93M1.6M0.01%Q1 2026
11
FMR LLC
CIK 0000315066
$90M2.0M0.00%Q2 2026
12
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$85M1.8M0.00%Q2 2026
13
Fisher Asset Management, LLC
CIK 0000850529
$71M1.5M0.02%Q2 2026
14
MORGAN STANLEY
CIK 0000895421
$70M1.5M0.00%Q2 2026
15
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$52M1.1M0.02%Q2 2026
16
GOLDMAN SACHS GROUP INC
CIK 0000886982
$48M1.0M0.00%Q2 2026
17
Impala Asset Management LLC
CIK 0001317679
$48M1.0M27.00%Q2 2026
18
D. E. Shaw & Co., Inc.
CIK 0001009207
$47M1.2M0.03%Q4 2025
19
Encompass Capital Advisors LLC
CIK 0001541901
$41M900K1.47%Q2 2026
20
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
CIK 0001705339
$40M871K0.05%Q2 2026
Page 1 of 22
403 more holders available. Log in →
Insiders at CENTURY ALUM CO
Berntzen Jarl →Olivier Tamla A →Bush Jennifer Mary →Calloway Kenneth L →Hafberg Agust F →Aboud Matt →Michelmore Andrew G →Glasser Errol →