Latest Period
Q4 2025
Security Snapshot
Algoma Steel Group Inc. - Common Shares, no par value (ASTL) Institutional Ownership
CUSIP: 015658107
13F Institutional Holders and Ownership History from Q4 2021 to Q1 2026
Institutions Reporting
109
Shares (Excl. Options)
83,116,370
Price
$4.10
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- Type / Class
- Equity / Common Shares, no par value
- Symbol
- ASTL on Nasdaq
- Shares outstanding
- 105,393,220
- Price per share
- $4.71
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 83,116,370
- Total reported value
- $346,027,150
- % of total 13F portfolios
- 0%
- Share change
- +4,809,612
- Value change
- +$24,898,340
- Number of holders
- 109
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- ASTL - Algoma Steel Group Inc. - Common Shares, no par value is tracked under CUSIP 015658107.
- 109 institutions reported positions in Q4 2025.
- 6 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 109 to 6 between Q4 2025 and Q1 2026.
- Reported value moved from $346,027,150 to $905,346.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 109 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 015658107?
CUSIP 015658107 identifies ASTL - Algoma Steel Group Inc. - Common Shares, no par value in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 015658107:
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, 109 institutional investors reported holding 83,116,370 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 |
|---|---|---|---|---|---|
| 2026 Q1 | 219,925 | $905,346 | +$24,812 | $4.12 | 6 |
| 2025 Q4 | 83,116,370 | $346,027,150 | +$24,898,340 | $4.10 | 109 |
| 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 |