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
105,325,530
Price per share
$4.10
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
77,189,775
Total reported value
$274,608,877
% of total 13F portfolios
0%
Share change
-3,124,689
Value change
-$41,161,659
Number of holders
117
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 10% +29% $44,763,350 +$10,428,331 10,532,553 +30% MMCAP International Inc. SPC 18 Nov 2025
DONALD SMITH & CO., INC. 5.7% -1.7% $21,106,106 -$366,691 5,937,020 -1.7% DONALD SMITH & CO., INC. 30 Sep 2025
Stoney Lonesome HF LP 5.4% +4% $29,789,374 +$2,059,945 5,864,050 +7.4% COGHILL CLINT D 30 Jun 2025
BlackRock, Inc. 3.7% $18,834,460 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 30 Sep 2025, 117 institutional investors reported holding 77,189,775 shares of Algoma Steel Group Inc. - Common Shares, no par value (ASTL). This represents 73% of the company’s total 105,325,530 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Algoma Steel Group Inc. - Common Shares, no par value (ASTL) together control 62% 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. 9.9% 10,430,818 +24% 1.5% $37,081,558
MMCAP International Inc. SPC 7.7% 8,078,828 +12% 3.3% $28,720,234
BlackRock, Inc. 7% 7,333,104 +15% 0% $26,069,186
DONALD SMITH & CO., INC. 5.6% 5,937,020 -1.7% 0.42% $21,106,106
Scheer, Rowlett & Associates Investment Management Ltd. 3.6% 3,828,929 -1.8% 0.81% $13,588,209
INVESCO SENIOR SECURED MANAGEMENT INC /ADV 3.1% 3,233,117 0% 35% $11,509,896
LITTLEJOHN & CO LLC 2.6% 2,693,887 +18% 4.8% $9,576,768
GOLDENTREE ASSET MANAGEMENT LP 2.4% 2,493,548 0% 0.73% $8,864,564
J. Goldman & Co LP 2.1% 2,263,011 +1.2% 0.3% $8,045,005
FMR LLC 2.1% 2,214,646 -44% 0% $7,873,067
CONTRARIAN CAPITAL MANAGEMENT, L.L.C. 1.9% 2,037,686 -43% 1.8% $7,243,974
AEGIS FINANCIAL CORP 1.7% 1,786,122 0% 2.4% $6,349,664
Quadrature Capital Ltd 1.5% 1,529,100 +14366% 0.06% $5,438,654
AYAL Capital Advisors Ltd 1.4% 1,467,000 +34% 3% $5,215,185
MORGAN STANLEY 1.2% 1,292,103 +219% 0% $4,593,426
LM Asset (IM) Inc. 1.1% 1,150,000 +29% 3.2% $4,088,250
Solas Capital Management, LLC 1% 1,091,248 -24% 2.4% $3,879,387
JB CAPITAL PARTNERS LP 0.94% 992,177 0% 0.6% $3,532,150
Bracebridge Capital, LLC 0.88% 924,931 0% 1.4% $3,288,130
Amitell Capital Pte Ltd 0.82% 864,585 -20% 2.3% $3,073,600
Bain Capital Credit, LP 0.79% 837,212 0% 0.94% $2,976,290
JANE STREET GROUP, LLC 0.79% 827,250 0% $2,940,874
MILLENNIUM MANAGEMENT LLC 0.67% 704,380 +400% 0% $2,500,796
TCW GROUP INC 0.64% 672,678 -40% 0.02% $2,391,370
READYSTATE ASSET MANAGEMENT LP 0.61% 640,324 +13% 0.11% $2,276,352

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 187,409 $770,457 +$249,735 $4.10 5
2025 Q3 77,189,775 $274,608,877 -$41,161,659 $3.56 117
2025 Q2 80,222,845 $552,932,141 +$28,189,177 $6.89 127
2025 Q1 76,933,946 $425,534,483 -$41,916,147 $5.42 127
2024 Q4 81,408,306 $795,639,115 +$29,934,582 $9.78 133
2024 Q3 78,026,072 $792,790,621 +$47,267,446 $10.23 132
2024 Q2 66,421,432 $462,499,892 +$51,569 $6.96 114
2024 Q1 71,263,646 $605,192,222 -$11,026,189 $8.49 111
2023 Q4 92,063 $923,392 +$251,934 $10.03 1
2023 Q3 67,765,050 $461,213,075 +$7,238,626 $6.80 108
2023 Q2 66,639,008 $473,384,014 +$2,206,478 $7.10 114
2023 Q1 65,810,593 $531,259,118 -$39,994,482 $8.08 112
2022 Q4 73,588,726 $466,704,139 +$15,422,339 $6.34 115
2022 Q3 65,836,099 $424,183,650 -$257,243,912 $6.44 111
2022 Q2 102,756,040 $922,783,000 +$69,824,035 $8.98 116
2022 Q1 93,764,475 $1,052,129,000 +$347,305,603 $11.25 86
2021 Q4 61,660,759 $642,278,000 +$642,245,492 $10.81 66