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 September 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.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Scheer, Rowlett & Associates Investment Management Ltd. | 3.8M | 33.2% |
| LITTLEJOHN & CO LLC | 1.5M | 13.2% |
| MACKENZIE FINANCIAL CORP | 1.3M | 11.1% |
| Connor, Clark & Lunn Investment Management Ltd. | 1.1M | 9.4% |
| BARCLAYS PLC | 772.1K | 6.7% |
| Russell Investments Group, Ltd. | 545.5K | 4.7% |
| ACADIAN ASSET MANAGEMENT LLC | 466.0K | 4.0% |
| DIMENSIONAL FUND ADVISORS LP | 395.9K | 3.4% |
| BANK OF MONTREAL /CAN/ | 312.3K | 2.7% |
| WOLVERINE ASSET MANAGEMENT LLC | 229.9K | 2.0% |
| StoneX Group Inc. | 206.6K | 1.8% |
| UBS Group AG | 169.5K | 1.5% |
| Quinn Opportunity Partners LLC | 142.3K | 1.2% |
| SIMPLEX TRADING, LLC | 93.8K | 0.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 81.0K | 0.7% |
| LPL Financial LLC | 69.4K | 0.6% |
| Monaco Asset Management SAM | 66.1K | 0.6% |
| Net Worth Advisory Group | 49.8K | 0.4% |
| Terril Brothers, Inc. | 47.0K | 0.4% |
| Phoenix Financial Ltd. | 35.7K | 0.3% |
| FIL Ltd | 34.0K | 0.3% |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management | 21.8K | 0.2% |
| CIBC WORLD MARKET INC. | 21.7K | 0.2% |
| IMC-Chicago, LLC | 16.6K | 0.1% |
| VICTORY CAPITAL MANAGEMENT INC | 11.2K | 0.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| TCW GROUP INC | Sold Out | 607.5K | 0 | -607.5K |
| BARCLAYS PLC | Increased | 309.0K | 772.1K | +463.2K |
| Connor, Clark & Lunn Investment Management Ltd. | Reduced | 1.4M | 1.1M | -298.8K |
| UBS Group AG | Increased | 12.3K | 169.5K | +157.2K |
| Russell Investments Group, Ltd. | Increased | 471.3K | 545.5K | +74.2K |
| Monaco Asset Management SAM | New | 0 | 66.1K | +66.1K |
| MACKENZIE FINANCIAL CORP | Reduced | 1.3M | 1.3M | -49.0K |
| Squarepoint Ops LLC | Sold Out | 41.8K | 0 | -41.8K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 356.1K | 395.9K | +39.8K |
| Y-Intercept (Hong Kong) Ltd | Sold Out | 35.5K | 0 | -35.5K |
| SIMPLEX TRADING, LLC | Reduced | 125.7K | 93.8K | -31.9K |
| Net Worth Advisory Group | Increased | 20.8K | 49.8K | +28.9K |
| Olympiad Research LP | Sold Out | 25.7K | 0 | -25.7K |
| BANK OF MONTREAL /CAN/ | Increased | 288.5K | 312.3K | +23.8K |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | 488.2K | 466.0K | -22.2K |
| Scheer, Rowlett & Associates Investment Management Ltd. | Reduced | 3.8M | 3.8M | -19.8K |
| IMC-Chicago, LLC | New | 0 | 16.6K | +16.6K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 67.9K | 81.0K | +13.2K |
| FIL Ltd | Increased | 22.9K | 34.0K | +11.1K |
| Terril Brothers, Inc. | Reduced | 54.0K | 47.0K | -7.0K |
| TD Waterhouse Canada Inc. | Reduced | 6.7K | 200 | -6.5K |
| CITIGROUP INC | Reduced | 6.8K | 2.1K | -4.7K |
| CIBC WORLD MARKET INC. | Reduced | 25.3K | 21.7K | -3.6K |
| StoneX Group Inc. | Reduced | 207.9K | 206.6K | -1.3K |
| Stone House Investment Management, LLC | New | 0 | 1.1K | +1.1K |
| LPL Financial LLC | Increased | 68.6K | 69.4K | +810 |
| Nuveen, LLC | New | 0 | 258 | +258 |
| FNY Investment Advisers, LLC | Reduced | 830 | 700 | -130 |
| Caitong International Asset Management Co., Ltd | Sold Out | 128 | 0 | -128 |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 11.2K | 11.2K | -7 |
| Pinnacle Wealth Planning Services, Inc. | New | 0 | 5 | +5 |
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.