Company · Ownership research

Algoma Steel Group Inc. ASTL

CIK 0001860805 · CUSIP 015658107

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 015658107 (ASTL), not CUSIP 015658907 (ASTL), CUSIP 015658957 (ASTL), CUSIP 015658958 (ASTL), and does not merge CUSIPs.

This page lists the top 20 of 47 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	MMCAP International Inc. SPC CIK 1304857 · View history	$56.16M 13,468,603 shares	3.69%	+2.51M(+22.90%)Added	SEC filing ↗ Nov 12, 2026	▾
02	Scheer, Rowlett & Associates Investment Management Ltd. CIK 1426327 · View history	$16.00M 3,826,624 shares	1.17%	-19.77K(-0.50%)Reduced	SEC filing ↗ Nov 10, 2026	▾
03	Invesco Ltd. CIK 914208 · View history	$13.58M 3,257,190 shares	0.00%	+3.22M(+7,645.30%)Added	SEC filing ↗ Nov 12, 2026	▾
04	AEGIS FINANCIAL CORP CIK 1140753 · View history	$7.45M 1,786,122 shares	1.33%	0(0.00%)Unchanged	SEC filing ↗ Nov 12, 2026	▾
05	LITTLEJOHN & CO LLC CIK 1042537 · View history	$6.33M 1,518,714 shares	11.11%	0(0.00%)Unchanged	SEC filing ↗ Nov 6, 2026	▾
06	MACKENZIE FINANCIAL CORP CIK 919859 · View history	$5.34M 1,280,834 shares	0.01%	-48.97K(-3.70%)Reduced	SEC filing ↗ Nov 2, 2026	▾
07	Connor, Clark & Lunn Investment Management Ltd. CIK 1596800 · View history	$4.55M 1,088,500 shares	0.01%	-298.82K(-21.50%)Reduced	SEC filing ↗ Nov 10, 2026	▾
08	BARCLAYS PLC CIK 312069 · View history	$3.22M 772,125 shares	0.00%	+463.15K(+149.90%)Added	SEC filing ↗ Nov 6, 2026	▾
09	Russell Investments Group, Ltd. CIK 1692234 · View history	$2.27M 545,498 shares	0.00%	+74.21K(+15.70%)Added	SEC filing ↗ Nov 6, 2026	▾
10	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$1.95M 465,962 shares	0.00%	-22.23K(-4.60%)Reduced	SEC filing ↗ Nov 9, 2026	▾
11	JPMORGAN CHASE & CO CIK 19617 · View history	$1.89M 449,812 shares	0.00%	-360.40K(-44.50%)Reduced	SEC filing ↗ Nov 12, 2026	▾
12	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$1.65M 395,867 shares	0.00%	+39.75K(+11.20%)Added	SEC filing ↗ Nov 4, 2026	▾
13	BANK OF MONTREAL /CAN/ CIK 927971 · View history	$1.31M 312,308 shares	0.00%	+23.82K(+8.30%)Added	SEC filing ↗ Nov 9, 2026	▾
14	BNP PARIBAS FINANCIAL MARKETS CIK 1166588 · View history	$1.30M 311,566 shares	0.00%	-107.19K(-25.60%)Reduced	SEC filing ↗ Nov 12, 2026	▾
15	Quinn Opportunity Partners LLC CIK 1633275 · View history	$593.54K 142,336 shares	0.03%	0(0.00%)Unchanged	SEC filing ↗ Nov 10, 2026	▾
16	UBS Group AG CIK 1610520 · View history	$572.53K 137,298 shares	0.00%	+129.00K(+1,555.40%)Added	SEC filing ↗ Nov 10, 2026	▾
17	Summit Financial, LLC CIK 1765536 · View history	$460.09K 110,333 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 12, 2026	▾
18	Boston Partners CIK 1386060 · View history	$397.36K 95,290 shares	0.00%	+6.46K(+7.30%)Added	SEC filing ↗ Nov 10, 2026	▾
19	SIMPLEX TRADING, LLC CIK 1488542 · View history	$391.13K 93,795 shares	0.01%	-31.93K(-25.40%)Reduced	SEC filing ↗ Nov 4, 2026	▾
20	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$337.85K 81,018 shares	0.00%	+13.16K(+19.40%)Added	SEC filing ↗ Nov 6, 2026	▾

Showing 20 / 47 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

30,644,731

Not deduplicated across managers

Disclosed value

$127.87M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Algoma Steel Group Inc. · Q3 2026

Explore all 47 reporting institutions.

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.