DOSSIER · 13F Holders · Q1 2026Most-boughtAI cap-ex
CENX 2.75 05/01/28

Century Aluminum Co.

14 institutions still hold Century Aluminum Co. as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 156431AQ1·14 13F holders·last filed Mar 31, 2026
Market cap
7.4%
vs prior quarter
13F value held
$233M
74.0% inst. owned
of float
Holders
14
-98 QoQ
filers reporting
Activity
+36 / −107
+803 added · −721 reduced
this quarter
Concentration
53.74%
Context Capital Management, LLC #1
top holder share
AI Holders Summary · Q1 2026

14 institutions reported CENX 2.75 05/01/28 in Q1 2026. Context Capital Management, LLC leads at 53.7% of the visible book. -98 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Context Capital Management, LLC
CIK 0001301396
$125M39.8M2.90%Q1 2026
02
D. E. Shaw & Co., Inc.
CIK 0001009207
$29M13.5M0.02%Q4 2025
03
READYSTATE ASSET MANAGEMENT LP
CIK 0001900923
$25M12.1M1.03%Q4 2025
04
ABSOLUTE INVESTMENT ADVISERS, LLC
CIK 0001316187
$18M5.7M2.08%Q1 2026
05
BANK OF MONTREAL /CAN/
CIK 0000927971
$12M3.8M0.00%Q1 2026
06
WELLS FARGO & COMPANY/MN
CIK 0000072971
$11M4.2M0.00%Q1 2026
07
SSI INVESTMENT MANAGEMENT LLC
CIK 0000938487
$6M1.9M0.41%Q1 2026
08
FMR LLC
CIK 0000315066
$4M1.3M0.00%Q1 2026
09
AGF MANAGEMENT LTD
CIK 0001003518
$2M700K0.01%Q1 2026
10
Purpose Unlimited Inc.
CIK 0002115120
$787,125250K0.03%Q1 2026
11
Warberg Asset Management LLC
CIK 0001597506
$588,701188K0.10%Q1 2026
12
Sonora Investment Management Group, LLC
CIK 0001907552
$57,94035K0.00%Q3 2025
13
LORD, ABBETT & CO. LLC
CIK 0000728100
$8,8222.8M0.03%Q1 2026
14
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025