Algoma Steel Group Inc. - Common Shares, no par value (ASTL) Institutional Ownership

13F Institutional Holders and Ownership History from Q4 2021 to Q4 2025

Type / Class
Equity / Common Shares, no par value
Symbol
ASTL on Nasdaq
Shares outstanding
105,393,220
Price per share
$4.45
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
83,083,454
Total reported value
$345,892,194
% of total 13F portfolios
0%
Share change
+4,793,668
Value change
+$24,832,996
Number of holders
107
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Algoma Steel Group Inc. - Common Shares, no par value (ASTL) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Maple Rock Capital Partners Inc. 13% +34% $49,748,421 +$12,666,863 13,993,930 +34% Maple Rock Capital Partners Inc. 31 Oct 2025
MMCAP International Inc. SPC 11% +9% $48,708,531 +$4,050,506 11,487,861 +9.1% MMCAP International Inc. SPC 31 Dec 2025
Stoney Lonesome HF LP 5.4% +4% $40,931,069 +$2,830,397 5,864,050 +7.4% COGHILL CLINT D 30 Jun 2025
DONALD SMITH & CO., INC. 5.6% -1.7% $24,853,315 -$319,649 5,861,631 -1.3% DONALD SMITH & CO., INC. 31 Dec 2025
BlackRock, Inc. 3.7% $19,448,211 3,835,939 BlackRock, Inc. 31 Mar 2025
Zekelman Industries, Inc. 3.1% $16,408,390 3,229,998 Zekelman Industries, Inc. 10 Sep 2025

As of 31 Dec 2025, 107 institutional investors reported holding 83,083,454 shares of Algoma Steel Group Inc. - Common Shares, no par value (ASTL). This represents 79% of the company’s total 105,393,220 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Algoma Steel Group Inc. - Common Shares, no par value (ASTL) together control 70% 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
Maple Rock Capital Partners Inc. 14% 14,430,818 +38% 2% $59,166,354
MMCAP International Inc. SPC 11% 11,487,861 +42% 4.7% $47,110,695
BlackRock, Inc. 8.1% 8,501,903 +16% 0% $34,857,801
DONALD SMITH & CO., INC. 5.6% 5,861,631 -1.3% 0.45% $24,032,687
LITTLEJOHN & CO LLC 3.3% 3,446,503 +28% 7.4% $14,130,662
Scheer, Rowlett & Associates Investment Management Ltd. 3.2% 3,336,525 -13% 0.94% $13,734,837
INVESCO SENIOR SECURED MANAGEMENT INC /ADV 3.1% 3,233,117 0% 45% $18,267,111
GOLDENTREE ASSET MANAGEMENT LP 2.4% 2,493,548 0% 0.55% $10,223,547
Connor, Clark & Lunn Investment Management Ltd. 2.1% 2,264,863 0.02% $9,323,330
FMR LLC 2.1% 2,208,646 -0.27% 0% $9,055,449
AEGIS FINANCIAL CORP 1.7% 1,786,122 0% 1.7% $7,323,100
TD Asset Management Inc 1.6% 1,687,420 +1352% 0.01% $6,955,260
CDC Financial, Inc. 1.5% 1,580,749 0% 6% $6,481,071
LM Asset Management, Inc. 1.4% 1,470,000 +28% 4.8% $6,027,000
Verition Fund Management LLC 1.2% 1,248,802 0.03% $5,120,088
Solas Capital Management, LLC 1% 1,069,351 -2% 2.5% $4,384,339
MORGAN STANLEY 0.99% 1,040,539 -19% 0% $4,266,210
Quadrature Capital Ltd 0.97% 1,018,100 -33% 0.04% $4,195,288
UBS Group AG 0.9% 944,764 +65% 0% $3,873,533
Bracebridge Capital, LLC 0.88% 924,931 0% 1.4% $3,792,217
JB CAPITAL PARTNERS LP 0.83% 872,277 -12% 0.62% $3,576,336
Bain Capital Credit, LP 0.78% 825,777 -1.4% 0.89% $3,385,687
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.67% 702,734 +38% 0% $2,896,551
JANE STREET GROUP, LLC 0.67% 701,942 -15% 0% $2,877,962
TCW GROUP INC 0.64% 672,678 0% 0.02% $2,757,980

Institutional Holders of Algoma Steel Group Inc. - Common Shares, no par value (ASTL) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 83,083,454 $345,892,194 +$24,832,996 $4.10 107
2025 Q3 77,189,775 $274,608,877 -$41,161,786 $3.56 117
2025 Q2 80,222,845 $552,932,141 +$28,189,160 $6.89 127
2025 Q1 76,933,946 $425,534,483 -$41,916,215 $5.42 127
2024 Q4 81,408,306 $795,639,115 +$29,934,614 $9.78 133
2024 Q3 78,026,072 $792,790,621 +$47,267,482 $10.23 130
2024 Q2 66,421,432 $462,499,892 +$51,520 $6.96 113
2024 Q1 71,265,694 $605,209,689 -$11,238,461 $8.49 107
2023 Q4 71,001,366 $711,858,801 +$37,356,496 $10.03 117
2023 Q3 67,776,758 $461,292,458 +$7,217,061 $6.80 110
2023 Q2 66,653,892 $473,489,132 +$2,579,821 $7.10 115
2023 Q1 65,822,650 $531,356,630 -$41,558,093 $8.08 113
2022 Q4 73,604,822 $466,805,686 -$709,654 $6.34 117
2022 Q3 65,858,710 $424,329,314 -$258,000,949 $6.44 113
2022 Q2 102,793,506 $923,119,126 +$70,810,807 $8.98 118
2022 Q1 93,770,075 $1,052,191,915 +$347,349,077 $11.25 87
2021 Q4 61,661,759 $642,288,728 +$642,256,728 $10.81 67