ASTL Institutional Ownership & Shareholders
ALGOMA STEEL GROUP INC (ASTL) is currently held by 94 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $289.69M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Maple Rock Capital Partners Inc. is currently the largest disclosed institutional shareholder of ASTL tracked by InsiderSet, reporting ownership valued at approximately $68.29M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $83.30M, representing an estimated gain of +21.98% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 71% of the total disclosed ASTL value among the investors covered in this analysis. Major shareholders include Maple Rock Capital Partners Inc., Mmcap International Inc. Spc, Donald Smith & Co., and several other long-term asset managers with concentrated positions in ALGOMA STEEL GROUP INC (ASTL).
This page ranks the largest institutional ASTL shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
94
Total Reported Value
$289.69M
Largest Holder
Maple Rock Capital Partners Inc.
Largest Position
$68.29M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
138
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Maple Rock Capital Partners Inc. | 1.34% | 16,861,818 | $68,290,363 | $83,297,381 | +$15,007,018 | +21.98% | |
| Mmcap International Inc. Spc | 3.76% | 10,954,738 | $44,366,689 | $54,116,406 | +$9,749,717 | +21.98% | |
| Donald Smith & Co. | Donald G. Smith | 0.38% | 5,277,631 | $21,374,406 | $26,071,497 | +$4,697,091 | +21.98% |
| Blackrock, Inc. | 0.00% | 4,143,265 | $16,780,223 | $20,467,729 | +$3,687,506 | +21.98% | |
| Scheer, Rowlett & Associates Investment Management Ltd. | 1.13% | 3,846,390 | $15,660,050 | $19,001,167 | +$3,341,117 | +21.34% | |
| Morgan Stanley | 0.00% | 2,958,350 | $11,981,317 | $14,614,249 | +$2,632,932 | +21.98% | |
| Aegis Financial Corp | 1.14% | 1,786,122 | $7,233,794 | $8,823,443 | +$1,589,649 | +21.98% | |
| Cdc Financial, Inc. | 5.43% | 1,745,647 | $7,069,870 | $8,623,496 | +$1,553,626 | +21.98% | |
| Brightline Capital Management, Llc | 1.46% | 1,660,000 | $6,723,000 | $8,200,400 | +$1,477,400 | +21.98% | |
| Littlejohn & Co Llc | 7.83% | 1,518,714 | $6,150,792 | $7,502,447 | +$1,351,655 | +21.98% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | 1,387,320 | $5,648,283 | $6,853,361 | +$1,205,078 | +21.34% | |
| Mackenzie Financial Corp | 0.01% | 1,280,834 | $5,342,204 | $6,327,320 | +$985,116 | +18.44% | |
| Sourcerock Group Llc | 0.26% | 1,247,507 | $5,052,403 | $6,162,685 | +$1,110,282 | +21.98% | |
| Two Sigma Investments, Lp | 0.00% | 1,041,811 | $4,219,335 | $5,146,546 | +$927,211 | +21.98% | |
| Lm Asset Management Inc. | 2.85% | 1,016,000 | $4,114,800 | $5,019,040 | +$904,240 | +21.98% | |
| Bracebridge Capital, Llc | 0.81% | 924,931 | $3,745,971 | $4,569,159 | +$823,188 | +21.98% | |
| Jb Capital Partners Lp | 0.55% | 872,277 | $3,532,722 | $4,309,048 | +$776,326 | +21.98% | |
| Citadel Advisors Llc | 0.00% | 845,935 | $3,426,037 | $4,178,919 | +$752,882 | +21.98% | |
| Bain Capital Credit, Lp | 0.91% | 825,777 | $3,344,397 | $4,079,338 | +$734,941 | +21.98% | |
| Jpmorgan Chase & Co | 0.00% | 810,208 | $3,248,934 | $4,002,428 | +$753,494 | +23.19% | |
| Ewing Morris & Co. Investment Partners Ltd. | 1.54% | 722,350 | $2,942,860 | $3,568,409 | +$625,549 | +21.26% | |
| Quadrature Capital Ltd | 0.02% | 682,493 | $2,779,950 | $3,371,515 | +$591,565 | +21.28% | |
| D. E. Shaw & Co., Inc. | 0.00% | 670,373 | $2,721,987 | $3,311,643 | +$589,656 | +21.66% | |
| Point72 Asset Management, L.P. | 0.00% | 575,225 | $2,328,720 | $2,841,612 | +$512,892 | +22.02% | |
| Td Asset Management Inc | 0.00% | 498,279 | $2,029,993 | $2,461,498 | +$431,505 | +21.26% | |
| Marshall Wace, Llp | 0.00% | 499,494 | $2,022,951 | $2,467,500 | +$444,549 | +21.98% | |
| Acadian Asset Management Llc | 0.00% | 488,194 | $1,986,000 | $2,411,678 | +$425,678 | +21.43% | |
| Russell Investments Group, Ltd. | 0.00% | 471,288 | $1,908,713 | $2,328,163 | +$419,450 | +21.98% | |
| Readystate Asset Management Lp | 0.08% | 463,228 | $1,876,073 | $2,288,346 | +$412,273 | +21.98% | |
| Charles Schwab Investment Management Inc | 0.00% | 438,431 | $1,786,172 | $2,165,849 | +$379,677 | +21.26% | |
| Bnp Paribas Financial Markets | 0.00% | 418,754 | $1,695,954 | $2,068,645 | +$372,691 | +21.98% | |
| Millennium Management Llc | 0.00% | 386,942 | $1,570,380 | $1,911,493 | +$341,113 | +21.72% | |
| Dimensional Fund Advisors Lp | 0.00% | 356,116 | $1,442,024 | $1,759,213 | +$317,189 | +22.00% | |
| Barclays Plc | 0.00% | 308,972 | $1,251,337 | $1,526,322 | +$274,985 | +21.98% | |
| Voleon Capital Management Lp | 0.02% | 307,297 | $1,244,553 | $1,518,047 | +$273,494 | +21.98% | |
| Bank Of Montreal | 0.00% | 288,488 | $1,174,539 | $1,425,131 | +$250,592 | +21.34% | |
| Jump Financial, Llc | 0.01% | 289,675 | $1,173,184 | $1,430,995 | +$257,811 | +21.98% | |
| Goldman Sachs Group Inc | 0.00% | 264,994 | $1,073,226 | $1,309,070 | +$235,844 | +21.98% | |
| Royal Bank Of Canada | 0.00% | 149,303 | $604,000 | $737,557 | +$133,557 | +22.11% | |
| Quinn Opportunity Partners Llc | 0.03% | 142,336 | $576,461 | $703,140 | +$126,679 | +21.98% | |
| Simplex Trading, Llc | 0.01% | 125,725 | $509,186 | $621,082 | +$111,896 | +21.98% | |
| Xtx Topco Ltd | 0.01% | 122,662 | $496,781 | $605,950 | +$109,169 | +21.98% | |
| Bank Of America Corp | 0.00% | 116,242 | $470,780 | $574,235 | +$103,455 | +21.98% | |
| Summit Financial, Llc | 0.00% | 110,333 | $446,849 | $545,045 | +$98,196 | +21.98% | |
| Quantbot Technologies Lp | 0.02% | 109,199 | $442,256 | $539,443 | +$97,187 | +21.98% | |
| Exoduspoint Capital Management, Lp | 0.00% | 101,746 | $412,071 | $502,625 | +$90,554 | +21.98% | |
| Sig North Trading, Ulc | 0.07% | 96,117 | $389,274 | $474,818 | +$85,544 | +21.98% | |
| Boston Partners | 0.00% | 88,825 | $359,740 | $438,796 | +$79,056 | +21.98% | |
| Pdt Partners, Llc | 0.02% | 73,079 | $295,970 | $361,010 | +$65,040 | +21.98% | |
| Boothbay Fund Management, Llc | 0.01% | 71,194 | $288,336 | $351,698 | +$63,362 | +21.98% |
Frequently asked questions about ASTL
Who are the largest institutional holders of ASTL?
The largest institutional holders of ASTL reported in the latest SEC Form 13F filings include Maple Rock Capital Partners Inc., Mmcap International Inc. Spc, Donald Smith & Co., Blackrock, Inc., and Scheer, Rowlett & Associates Investment Management Ltd.. InsiderSet ranks institutional holders by their latest reported ASTL position.
What is ASTL institutional ownership?
This page tracks ASTL positions reported by institutional investment managers through SEC Form 13F. ALGOMA STEEL GROUP INC (ASTL) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ASTL?
InsiderSet currently tracks 94 institutional managers reporting ASTL holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ASTL shareholders.
How much ASTL stock do institutions own?
Institutional investment managers disclosed approximately $289.69M in ASTL holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ASTL institutional ownership last updated?
The latest ASTL institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ASTL holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ASTL position after the reporting date.
Are institutions buying or selling ASTL?
Institutional buying and selling can be analyzed by comparing ASTL positions across consecutive 13F reporting periods. InsiderSet's ASTL Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ASTL ownership changes.
How has ASTL institutional ownership changed over time?
InsiderSet tracks ASTL institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.