13F Insight
DOSSIER · 13F Holders · Q4 2025
ASTL

ALGOMA STL GROUP INC

106 institutions still hold ALGOMA STL GROUP INC as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 015658107·106 13F holders·last filed Dec 31, 2025
Market cap
—
13F value held
$266M
visible holders
Holders
106
filers reporting
Concentration
22.22%
Maple Rock Capital Partners Inc. #1
top holder share
AI Holders Summary · Q4 2025

106 institutions reported ASTL in Q4 2025. Maple Rock Capital Partners Inc. leads at 22.2% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
Maple Rock Capital Partners Inc.
CIK 0001658363
$59M14.4M1.95%Q4 202502
MMCAP International Inc. SPC
CIK 0001304857
$53M12.8M4.58%Q1 202603
DONALD SMITH & CO., INC.
CIK 0000814375
$25M6.0M0.45%Q1 202604
INVESCO SENIOR SECURED MANAGEMENT INC /ADV
CIK 0000870481
$18M3.2M44.65%Q4 202505
BlackRock, Inc.
CIK 0002012383
$17M4.1M0.00%Q2 202606
LITTLEJOHN & CO LLC
CIK 0001042537
$14M3.4M13.48%Q1 202607
Scheer, Rowlett & Associates Investment Management Ltd.
CIK 0001426327
$13M3.2M0.95%Q1 202608
AEGIS FINANCIAL CORP
CIK 0001140753
$7M1.8M1.27%Q1 202609
LM Asset (IM) Inc.
CIK 0002057190
$7M1.8M3.79%Q1 202610
CDC Financial, Inc.
CIK 0002077836
$7M1.8M4.61%Q1 202611
Connor, Clark & Lunn Investment Management Ltd.
CIK 0001596800
$7M1.7M0.02%Q1 202612
MORGAN STANLEY
CIK 0000895421
$6M1.5M0.00%Q1 202613
Sourcerock Group LLC
CIK 0001822531
$5M1.3M0.22%Q1 202614
Solas Capital Management, LLC
CIK 0001604867
$4M1.0M2.49%Q1 202615
CITADEL ADVISORS LLC
CIK 0001423053
$4M981K0.00%Q4 202516
Bracebridge Capital, LLC
CIK 0001426486
$4M925K0.10%Q1 202617
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$4M896K0.00%Q1 202618
JB CAPITAL PARTNERS LP
CIK 0001138532
$4M872K0.62%Q1 202619
Bain Capital Credit, LP
CIK 0001317947
$3M826K1.13%Q1 202620
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$3M766K0.00%Q1 2026
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