Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ASTL held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Maple Rock Capital Partners Inc. | 15.9M | $65.8M | +10.4% | 15.182% | 2.14% |
| 2 | MMCAP International Inc. SPC | 12.8M | $53.1M | +11.8% | 12.242% | 4.58% |
| 3 | DONALD SMITH & CO., INC. | 6.0M | $24.9M | +2.9% | 5.745% | 0.45% |
| 4 | BlackRock, Inc. | 4.1M | $17.0M | -51.6% | 3.922% | 0.00% |
| 5 | LITTLEJOHN & CO LLC | 3.4M | $14.2M | 0.0% | 3.284% | 13.49% |
| 6 | Scheer, Rowlett & Associates Investment Management Ltd. | 3.2M | $13.2M | -3.9% | 3.057% | 0.95% |
| 7 | AEGIS FINANCIAL CORP | 1.8M | $7.4M | 0.0% | 1.702% | 1.27% |
| 8 | LM Asset Management, Inc. | 1.8M | $7.3M | +20.1% | 1.682% | 3.79% |
| 9 | CDC Financial, Inc. | 1.8M | $7.2M | -30.1% | 1.671% | 5.37% |
| 10 | Connor, Clark & Lunn Investment Management Ltd. | 1.7M | $7.1M | -23.8% | 1.645% | 0.02% |
| 11 | MORGAN STANLEY | 1.5M | $6.1M | +42.6% | 1.414% | 0.00% |
| 12 | Sourcerock Group LLC | 1.3M | $5.4M | β | 1.245% | 0.22% |
| 13 | Solas Capital Management, LLC | 1.0M | $4.3M | -2.1% | 0.998% | 2.49% |
| 14 | Bracebridge Capital, LLC | 925K | $3.8M | 0.0% | 0.881% | 0.69% |
| 15 | JANE STREET GROUP, LLC | 896K | $3.7M | -1.1% | 0.853% | 0.03% |
| 16 | Quadrature Capital Ltd | 879K | $3.6M | -13.7% | 0.837% | 0.04% |
| 17 | JB CAPITAL PARTNERS LP | 872K | $3.6M | 0.0% | 0.831% | 0.62% |
| 18 | TD ASSET MANAGEMENT INC | 842K | $3.5M | -50.1% | 0.802% | 0.00% |
| 19 | Bain Capital Credit, LP | 826K | $3.4M | 0.0% | 0.787% | 1.13% |
| 20 | TCW GROUP INC | 768K | $3.2M | +14.2% | 0.732% | 0.02% |
| 21 | MILLENNIUM MANAGEMENT LLC | 766K | $3.2M | +8.0% | 0.730% | 0.00% |
| 22 | Ewing Morris & Co. Investment Partners Ltd. | 710K | $2.9M | +15.9% | 0.677% | 1.32% |
| 23 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 673K | $2.8M | +5.6% | 0.642% | 0.00% |
| 24 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 599K | $2.5M | -14.8% | 0.571% | 0.00% |
| 25 | Russell Investments Group, Ltd. | 572K | $2.4M | +42.4% | 0.545% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in ASTL β a direct measure of their conviction.
Filings activity in ASTL during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ASTL position in Q1 2026
Institutions that fully closed their ASTL position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 98 | 5.8% | 56.82% | 9.90 pp | $299M | 15% |
| Q4 2025 | 104 | 8.8% | 66.72% | +14.38 pp | $351M | +27% |
| Q3 2025 | 114 | 8.8% | 52.34% | 50.35 pp | $275M | 49% |
| Q2 2025 | 125 | 2.3% | 102.69% | +15.80 pp | $540M | +18% |
| Q1 2025 | 128 | 0.8% | 86.89% | 54.73 pp | $457M | 39% |
| Q4 2024 | 129 | +0.0% | 141.62% | 10.40 pp | $744M | 6.8% |
| Q3 2024 | 129 | +12% | 152.02% | +46.16 pp | $799M | +44% |
| Q2 2024 | 115 | β | 105.86% | β | $557M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ASTL stock.
Based on Q1 2026 13F filings, institutional ownership of Algoma Steel Group Inc. stands at 56.8%, held across 98 reporting institutions.
Maple Rock Capital Partners Inc. is the largest reported institutional holder of ASTL, with approximately 15,930,818 shares worth $0.07B as of Q1 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of ASTL, including JANE STREET GROUP, LLC, MILLENNIUM MANAGEMENT LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for ASTL is 45 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
19 institutions opened new positions in ASTL during Q1 2026, while 25 fully exited. 46 added to existing positions and 31 trimmed.
ASTL institutional ownership fell by 9.90 percentage points quarter-over-quarter, with a net change of -6 holders.
The top 10 institutions account for 72.7% of all reported 13F value in ASTL, and the top 25 account for 90.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Algoma Steel Group Inc. (ASTL) Institutional Ownership