ASTL Algoma Steel Group Inc
Algoma Steel Group Inc (ASTL) Institutional Ownership
What the institutions did with ASTL last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| Maple Rock Capital Partners Inc. | 16.9M | 23.4% |
| MMCAP International Inc. SPC | 11.0M | 15.2% |
| DONALD SMITH & CO., INC. | 5.3M | 7.3% |
| BlackRock, Inc. | 4.1M | 5.7% |
| Scheer, Rowlett & Associates Investment Management Ltd. | 3.8M | 5.3% |
| MORGAN STANLEY | 3.0M | 4.1% |
| AEGIS FINANCIAL CORP | 1.8M | 2.5% |
| CDC Financial, Inc. | 1.7M | 2.4% |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC | 1.7M | 2.3% |
| LITTLEJOHN & CO LLC | 1.5M | 2.1% |
| Connor, Clark & Lunn Investment Management Ltd. | 1.4M | 1.9% |
| MACKENZIE FINANCIAL CORP | 1.3M | 1.8% |
| Sourcerock Group LLC | 1.2M | 1.7% |
| TWO SIGMA INVESTMENTS, LP | 1.0M | 1.4% |
| LM Asset Management Inc. | 1.0M | 1.4% |
| Bracebridge Capital, LLC | 924.9K | 1.3% |
| JB CAPITAL PARTNERS LP | 872.3K | 1.2% |
| CITADEL ADVISORS LLC | 845.9K | 1.2% |
| Bain Capital Credit, LP | 825.8K | 1.1% |
| JPMORGAN CHASE & CO | 810.2K | 1.1% |
| Ewing Morris & Co. Investment Partners Ltd. | 722.4K | 1.0% |
| Quadrature Capital Ltd | 682.5K | 0.9% |
| D. E. Shaw & Co., Inc. | 670.4K | 0.9% |
| TCW GROUP INC | 607.5K | 0.8% |
| Point72 Asset Management, L.P. | 575.2K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| LITTLEJOHN & CO LLC | Reduced | 3.4M | 1.5M | -1.9M |
| MMCAP International Inc. SPC | Reduced | 12.8M | 11.0M | -1.9M |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC | New | 0 | 1.7M | +1.7M |
| MORGAN STANLEY | Increased | 1.5M | 3.0M | +1.5M |
| MACKENZIE FINANCIAL CORP | Increased | 98.8K | 1.3M | +1.2M |
| Solas Capital Management, LLC | Sold Out | 1.0M | 0 | -1.0M |
| Maple Rock Capital Partners Inc. | Increased | 15.9M | 16.9M | +931.0K |
| JANE STREET GROUP, LLC | Reduced | 895.6K | 52.7K | -842.9K |
| TWO SIGMA INVESTMENTS, LP | Increased | 269.9K | 1.0M | +771.9K |
| DONALD SMITH & CO., INC. | Reduced | 6.0M | 5.3M | -751.3K |
| LM Asset Management Inc. | Reduced | 1.8M | 1.0M | -749.0K |
| Scheer, Rowlett & Associates Investment Management Ltd. | Increased | 3.2M | 3.8M | +638.9K |
| JPMORGAN CHASE & CO | Increased | 230.8K | 810.2K | +579.4K |
| CITADEL ADVISORS LLC | Increased | 267.7K | 845.9K | +578.2K |
| Point72 Asset Management, L.P. | Increased | 73.9K | 575.2K | +501.3K |
| MARSHALL WACE, LLP | New | 0 | 499.5K | +499.5K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 14.8K | 488.2K | +473.4K |
| HRT FINANCIAL LP | Sold Out | 467.2K | 0 | -467.2K |
| D. E. Shaw & Co., Inc. | Increased | 270.5K | 670.4K | +399.8K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 766.4K | 386.9K | -379.5K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 65.4K | 418.8K | +353.3K |
| TD Asset Management Inc | Reduced | 841.9K | 498.3K | -343.6K |
| Connor, Clark & Lunn Investment Management Ltd. | Reduced | 1.7M | 1.4M | -338.4K |
| UBS Group AG | Reduced | 307.0K | 8.3K | -298.7K |
| Jump Financial, LLC | New | 0 | 289.7K | +289.7K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.