Algoma Steel ASTL Institutional Ownership

NASDAQ ASTL

$4.49 +0.38 (+9.25%)

At close: Oct 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

95 Institutions

Increased 41 43.2%

Unchanged 18 18.9%

Reduced 36 37.9%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

66.36%

▲+0.15 pp QoQ

Shares Held by Institutions

72.13Mn

of 108.70Mn outstanding

▲+0.23% QoQ

Shares Outstanding

108.70Mn

36.57Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▼-3 vs prior quarter

Net Shares Added (QoQ)

+163.18K

accumulated since last quarter

Value of Holdings

$296.47Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Algoma Steel Group Inc. (NASDAQ:ASTL) was reported as a holding by 95 institutional investors in 13F filings for the quarter ended June 30, 2026.

Collectively, these holders controlled 66.36% of Algoma Steel's outstanding shares in Q2 2026, up from 66.21% in Q1 2026.
Total holdings of Algoma Steel shares rose 0.23% from Q1 2026, and the number of holders fell 24.60% from Q2 2025.
Of the 95 holders of ASTL in Q2 2026, 41 added to their positions, 36 reduced their stakes and 18 left their positions unchanged.
Altogether, institutional holders owned 72.13Mn ASTL shares at the end of Q2 2026, up 163.18K from the prior quarter and down 7.38Mn from a year earlier.
Maple Rock Capital Partners Inc. held the largest position in ASTL at 16.86Mn shares as of June 30, 2026, or 15.51% of shares outstanding.
Holders that added the most shares of Algoma Steel in Q2 2026 were Morgan Stanley (+1.47Mn shares), Mackenzie Financial Corp (+1.23Mn shares), Maple Rock Capital Partners Inc. (+931K shares), Two Sigma Investments, LP (+771.91K shares) and Scheer, Rowlett & Associates Investment Management Ltd. (+638.91K shares).
The biggest cuts to ASTL positions during Q2 2026 came from Littlejohn & Co LLC (-1.93Mn shares), MMCAP International Inc. SPC (-1.89Mn shares), Jane Street Group, LLC (-842.88K shares), Donald Smith & Co., Inc. (-751.3K shares) and LM Asset Management Inc. (-749K shares).
Algoma Steel's 10 largest institutional shareholders as of Q2 2026 were Maple Rock Capital Partners Inc. (16.86Mn shares), MMCAP International Inc. SPC (10.95Mn shares), Donald Smith & Co., Inc. (5.28Mn shares), BlackRock, Inc. (4.14Mn shares), Scheer, Rowlett & Associates Investment Management Ltd. (3.85Mn shares), Morgan Stanley (2.96Mn shares), Aegis Financial Corp (1.79Mn shares), CDC Financial, Inc. (1.75Mn shares), Brightline Capital Management, LLC (1.66Mn shares) and Littlejohn & Co LLC (1.52Mn shares), per Business Quant data.

Form 13F Holdings

95 Institutional Holders

Report period 30 Jun, 2026

Total shares held 72.13Mn

Of outstanding 66.36%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Maple Rock Capital Partners Inc.	0001658363	16,861,818	15.51%	▲931,000	+5.84%	$68.29Mn
2	MMCAP International Inc. SPC	0001304857	10,954,738	10.08%	▼1,890,884	-14.72%	$44.37Mn
3	DONALD SMITH & CO., INC.	0000814375	5,277,631	4.86%	▼751,298	-12.46%	$21.37Mn
4	BlackRock, Inc.	0002012383	4,143,265	3.81%	▲27,812	+0.68%	$16.78Mn
5	Scheer, Rowlett & Associates Investment Management Ltd.	0001426327	3,846,390	3.54%	▲638,910	+19.92%	$15.66Mn
6	Morgan Stanley	0000895421	2,958,350	2.72%	▲1,474,639	+99.39%	$11.98Mn
7	AEGIS FINANCIAL CORP	0001140753	1,786,122	1.64%	0	0.00%	$7.23Mn
8	CDC Financial, Inc.	0002077836	1,745,647	1.61%	▲131,898	+8.17%	$7.07Mn
9	BRIGHTLINE CAPITAL MANAGEMENT, LLC	0001432450	1,660,000	1.53%	▲1,660,000	0.00%	$6.72Mn
10	LITTLEJOHN & CO LLC	0001042537	1,518,714	1.40%	▼1,927,789	-55.93%	$6.15Mn
11	Connor, Clark & Lunn Investment Management Ltd.	0001596800	1,387,320	1.28%	▼338,438	-19.61%	$5.65Mn
12	MACKENZIE FINANCIAL CORP	0000919859	1,329,806	1.22%	▲1,231,033	+1,246.33%	$4.96Mn
13	Sourcerock Group LLC	0001822531	1,247,507	1.15%	▼58,896	-4.51%	$5.05Mn
14	TWO SIGMA INVESTMENTS, LP	0001179392	1,041,811	0.96%	▲771,911	+286.00%	$4.22Mn
15	LM Asset Management Inc.	0002057190	1,016,000	0.93%	▼749,000	-42.44%	$4.11Mn
16	Bracebridge Capital, LLC	0001426486	924,931	0.85%	0	0.00%	$3.75Mn
17	JB CAPITAL PARTNERS LP	0001138532	872,277	0.80%	0	0.00%	$3.53Mn
18	CITADEL ADVISORS LLC	0001423053	845,935	0.78%	▲578,192	+215.95%	$3.43Mn
19	Bain Capital Credit, LP	0001317947	825,777	0.76%	0	0.00%	$3.34Mn
20	Jpmorgan Chase & Co	0000019617	810,208	0.75%	▲579,391	+251.02%	$3.25Mn

Showing 1 to 20 of 95 holders