Vault-13

ALGOMA STL GROUP INC ASTL

COM · Common Stock · CUSIP 015658107 · ISIN CA0156581070

95 institutional holders -3 vs Q1 2026
72,111,18772.1m shares reported held*
$291.8mreported value*
12 new 30 added 36 reduced 15 sold out net bought ≈ $600.9k (+148.3k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($25.6k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $4.05. Options: 8 managers hold calls ($1.6m notional), 6 hold puts ($2.6m).

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

050100150Q3 22: 114Q4 22: 120Q1 23: 117Q2 23: 118Q3 23: 112Q4 23: 121Q1 24: 109Q2 24: 119Q3 24: 134Q4 24: 136Q1 25: 132Q2 25: 128Q3 25: 118Q4 25: 109Q1 26: 98Q2 26: 9595Q3 22Q3 23Q3 24Q3 25Q2 26
Numbers
QuarterHolders
Q3 2022114
Q4 2022120
Q1 2023117
Q2 2023118
Q3 2023112
Q4 2023121
Q1 2024109
Q2 2024119
Q3 2024134
Q4 2024136
Q1 2025132
Q2 2025128
Q3 2025118
Q4 2025109
Q1 202698
Q2 202695

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q3 24: 63 bought or addedQ3 24: 56 cut or sold outQ4 24: 62 bought or addedQ4 24: 56 cut or sold outQ4 24Q1 25: 62 bought or addedQ1 25: 62 cut or sold outQ2 25: 59 bought or addedQ2 25: 67 cut or sold outQ2 25Q3 25: 60 bought or addedQ3 25: 65 cut or sold outQ4 25: 63 bought or addedQ4 25: 56 cut or sold outQ4 25Q1 26: 47 bought or addedQ1 26: 58 cut or sold outQ2 26: 42 bought or addedQ2 26: 51 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 20246356
Q4 20246256
Q1 20256262
Q2 20255967
Q3 20256065
Q4 20256356
Q1 20264758
Q2 20264251

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$2.5m$5m$7.5m$10mQ3 25 calls: $6.3mQ3 25 puts: $6.6mQ3 25P/C 1.05Q4 25 calls: $9.5mQ4 25 puts: $6.9mQ4 25P/C 0.73Q1 26 calls: $3.3mQ1 26 puts: $4.8mQ1 26P/C 1.46Q2 26 calls: $1.6mQ2 26 puts: $2.6mQ2 26P/C 1.60
Numbers
QuarterCallsPutsP/C
Q3 2025$6.3m$6.6m1.05
Q4 2025$9.5m$6.9m0.73
Q1 2026$3.3m$4.8m1.46
Q2 2026$1.6m$2.6m1.60

Biggest buyers

BRIGHTLINE CAPITAL MANAGEMENT, LLC New +1,660,000+1.7m
MORGAN STANLEY Added +1,474,639+1.5m
MACKENZIE FINANCIAL CORP Added +1,231,033+1.2m
Maple Rock Capital Partners Inc. Added +931,000+931.0k
TWO SIGMA INVESTMENTS, LP Added +771,911+771.9k
Scheer, Rowlett & Associates Investment Management Ltd. Added +638,910+638.9k
JPMORGAN CHASE & CO Added +579,391+579.4k
CITADEL ADVISORS LLC Added +578,192+578.2k
Point72 Asset Management, L.P. Added +501,309+501.3k
MARSHALL WACE, LLP New +499,494+499.5k

Biggest sellers

LITTLEJOHN & CO LLC Reduced -1,927,789-1.9m
MMCAP International Inc. SPC Reduced -1,890,884-1.9m
Solas Capital Management, LLC Sold out -1,047,454-1.0m
JANE STREET GROUP, LLC Reduced -842,879-842.9k
DONALD SMITH & CO., INC. Reduced -751,298-751.3k
LM Asset Management Inc. Reduced -749,000-749.0k
HRT FINANCIAL LP Sold out -467,190-467.2k
MILLENNIUM MANAGEMENT LLC Reduced -379,469-379.5k
TD Asset Management Inc Reduced -343,625-343.6k
Connor, Clark & Lunn Investment Management Ltd. Reduced -338,438-338.4k

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $750.5k185.3k shares
SIG North Trading, ULC Reduced $447.5k110.5k shares
CDC Financial, Inc. Reduced $162.0k40.0k shares
IMC-Chicago, LLC Reduced $101.7k25.1k shares
JANE STREET GROUP, LLC New $58.3k14.4k shares
GROUP ONE TRADING LLC Added $54.3k13.4k shares
SIMPLEX TRADING, LLC Reduced $19.0k4.7k shares
FNY Investment Advisers, LLC Reduced $2.0k600 shares

Biggest puts

SIMPLEX TRADING, LLC Reduced $1.2m302.2k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $999.1k246.7k shares
SIG North Trading, ULC Reduced $280.3k69.2k shares
GROUP ONE TRADING LLC Unchanged $40.9k10.1k shares
Purpose Unlimited Inc. Reduced $9.9k2.0k shares
Alpine Global Management, LLC Reduced $2934 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Maple Rock Capital Partners Inc. 13G · institution +1.8 pts · filed 2026-05-15 15.1% +1.8 pts 15.9m≈ $64.5m 2026-05-15
MMCAP International Inc. SPC 13G · passive investor -1.8 pts · filed 2026-08-14 10.4% -1.8 pts 11.0m≈ $44.4m 2026-08-14
Stoney Lonesome HF LP 13G · passive investor +0.2 pts · filed 2025-08-14 5.4% +0.2 pts 5.9m≈ $23.7m 2025-08-14
DONALD SMITH & CO., INC. 13G · institution -0.8 pts · filed 2026-08-11 5.0% -0.8 pts 5.3m≈ $21.4m 2026-08-11

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Maple Rock Capital Partners Inc. 1.34% of their portfolio Toronto, A6 16,861,81816.9m $68.3m $68.3m 1.34% Added +931.0k +931,000
2 MMCAP International Inc. SPC 3.76% of their portfolio GRAND CAYMAN, E9 10,954,73811.0m $44.4m $44.4m 3.76% Reduced -1.9m -1,890,884
3 DONALD SMITH & CO., INC. 0.38% of their portfolio NEW YORK, NY 5,277,6315.3m $21.4m $21.4m 0.38% Reduced -751.3k -751,298
4 BlackRock, Inc. 0.00% of their portfolio New York, NY 4,143,2654.1m $16.8m $16.8m 0.00% Added +27.8k +27,812
5 Scheer, Rowlett & Associates Investment Management Ltd. 1.13% of their portfolio TORONTO, A6 3,846,3903.8m $15.7m $15.7m 1.13% Added +638.9k +638,910
6 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 2,958,3503.0m $12.0m $12.0m 0.00% Added +1.5m +1,474,639
7 AEGIS FINANCIAL CORP 1.14% of their portfolio MC LEAN, VA 1,786,1221.8m $7.2m $7.2m 1.14% Unchanged
8 CDC Financial, Inc. 5.43% of their portfolio CHICAGO, IL 1,745,6471.7m $7.1m $7.1m 5.43% Added +131.9k +131,898
9 BRIGHTLINE CAPITAL MANAGEMENT, LLC 1.46% of their portfolio Miami, FL 1,660,0001.7m $6.7m $6.7m 1.46% New
10 LITTLEJOHN & CO LLC 7.83% of their portfolio GREENWICH, CT 1,518,7141.5m $6.2m $6.2m 7.83% Reduced -1.9m -1,927,789
11 Connor, Clark & Lunn Investment Management Ltd. 0.01% of their portfolio VANCOUVER, A1 1,387,3201.4m $5.6m $5.6m 0.01% Reduced -338.4k -338,438
12 MACKENZIE FINANCIAL CORP 0.00% of their portfolio TORONTO ONTARIO, A6 1,329,8061.3m $5.0m $5.0m 0.00% Added +1.2m +1,231,033
13 Sourcerock Group LLC 0.26% of their portfolio DENVER, CO 1,247,5071.2m $5.1m $5.1m 0.26% Reduced -58.9k -58,896
14 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 1,041,8111.0m $4.2m $4.2m 0.00% Added +771.9k +771,911
15 LM Asset Management Inc. 2.85% of their portfolio VANCOUVER, A1 1,016,0001.0m $4.1m $4.1m 2.85% Reduced -749.0k -749,000
16 Bracebridge Capital, LLC 0.81% of their portfolio BOSTON, MA 924,931924.9k $3.7m $3.7m 0.81% Unchanged
17 JB CAPITAL PARTNERS LP 0.55% of their portfolio Armonk, NY 872,277872.3k $3.5m $3.5m 0.55% Unchanged
18 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 845,935845.9k $3.4m $3.4m 0.00% Added +578.2k +578,192
19 Bain Capital Credit, LP 0.91% of their portfolio Boston, MA 825,777825.8k $3.3m $3.3m 0.91% Unchanged
20 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 810,208810.2k $3.2m $3.2m 0.00% Added +579.4k +579,391
21 Ewing Morris & Co. Investment Partners Ltd. 1.54% of their portfolio TORONTO, Z4 722,350722.4k $2.9m $2.9m 1.54% Added +12.3k +12,350
22 Quadrature Capital Ltd 0.02% of their portfolio LONDON, X0 682,493682.5k $2.8m $2.8m 0.02% Reduced -196.0k -196,047
23 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 670,373670.4k $2.7m $2.7m 0.00% Added +399.8k +399,829
24 TCW GROUP INC 0.02% of their portfolio LOS ANGELES, CA 607,478607.5k $2.5m $2.5m 0.02% Reduced -160.7k -160,700
25 Point72 Asset Management, L.P. 0.00% of their portfolio STAMFORD, CT 575,225575.2k $2.3m $2.3m 0.00% Added +501.3k +501,309
26 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 499,494499.5k $2.0m $2.0m 0.00% New
27 TD Asset Management Inc 0.00% of their portfolio Toronto, A6 498,279498.3k $2.0m $2.0m 0.00% Reduced -343.6k -343,625
28 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 488,194488.2k $2.0m $2.0m 0.00% Added +473.4k +473,394
29 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 471,288471.3k $1.9m $1.9m 0.00% Reduced -100.3k -100,278
30 READYSTATE ASSET MANAGEMENT LP 0.08% of their portfolio CHICAGO, IL 463,228463.2k $1.9m $1.9m 0.08% Unchanged
31 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 438,431438.4k $1.8m $1.8m 0.00% Reduced -160.5k -160,488
32 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 418,754418.8k $1.7m $1.7m 0.00% Added +353.3k +353,337
33 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 386,942386.9k $1.6m $1.6m 0.00% Reduced -379.5k -379,469
34 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 356,116356.1k $1.4m $1.4m 0.00% Reduced -5.9k -5,880
35 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 308,972309.0k $1.3m $1.3m 0.00% Added +137.4k +137,416
36 Voleon Capital Management LP 0.02% of their portfolio BERKELEY, CA 307,297307.3k $1.2m $1.2m 0.02% Added +176.4k +176,378
37 Jump Financial, LLC 0.01% of their portfolio Chicago, IL 289,675289.7k $1.2m $1.2m 0.01% New
38 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 288,488288.5k $1.2m $1.2m 0.00% Added +15.9k +15,875
39 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 264,994265.0k $1.1m $1.1m 0.00% Added +12.5k +12,537
40 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 149,303149.3k $604.0k $604.0k 0.00% Added +2.5k +2,482
41 Quinn Opportunity Partners LLC 0.03% of their portfolio CHARLOTTESVILLE, VA 142,336142.3k $576.5k $576.5k 0.03% Unchanged
42 SIMPLEX TRADING, LLC 0.01% of their portfolio CHICAGO, IL 125,725125.7k $509.2k $509.2k 0.01% Reduced -29.2k -29,180
43 XTX Topco Ltd 0.01% of their portfolio LONDON, X0 122,662122.7k $496.8k $496.8k 0.01% Reduced -59.7k -59,685
44 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 116,242116.2k $470.8k $470.8k 0.00% Added +53.8k +53,849
45 Summit Financial, LLC 0.00% of their portfolio PARSIPPANY, NJ 110,333110.3k $446.8k $446.8k 0.00% Unchanged
46 Quantbot Technologies LP 0.02% of their portfolio NEW YORK, NY 109,199109.2k $442.3k $442.3k 0.02% Reduced -48.7k -48,729
47 ExodusPoint Capital Management, LP 0.00% of their portfolio NEW YORK, NY 101,746101.7k $412.1k $412.1k 0.00% Reduced -127.8k -127,817
48 SIG North Trading, ULC 0.07% of their portfolio Bala Cynwyd, PA 96,11796.1k $389.3k $389.3k 0.07% Reduced -75.7k -75,700
49 Boston Partners 0.00% of their portfolio BOSTON, MA 88,82588.8k $359.7k $359.7k 0.00% Added +1.8k +1,758
50 PDT Partners, LLC 0.02% of their portfolio New York, NY 73,07973.1k $296.0k $296.0k 0.02% Added +2.8k +2,775
51 BOOTHBAY FUND MANAGEMENT, LLC 0.01% of their portfolio NEW YORK, NY 71,19471.2k $288.3k $288.3k 0.01% Added +26.1k +26,124
52 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 67,85967.9k $274.8k $274.8k 0.00% Added +4.0k +4,046
53 GSA CAPITAL PARTNERS LLP 0.02% of their portfolio LONDON, X0 66,46366.5k $269.0k $269.0k 0.02% Added +11.5k +11,480
54 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 56,52656.5k $228.9k $228.9k 0.00% Reduced -3.3k -3,268
55 Terril Brothers, Inc. 0.06% of their portfolio St. Louis, MO 54,00054.0k $218.7k $218.7k 0.06% Reduced -4.0k -4,000
56 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 53,26753.3k $213.6k $213.6k 0.00% Reduced -1.1k -1,112
57 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 52,68752.7k $213.4k $213.4k 0.00% Reduced -842.9k -842,879
58 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 50,80050.8k $207.0k $207.0k 0.00% Added +9.7k +9,724
59 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 42,05442.1k $170.3k $170.3k 0.00% Reduced -17.1k -17,096
60 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 41,80641.8k $169.3k $169.3k 0.00% Reduced -22.4k -22,368
61 Campbell & CO Investment Adviser LLC 0.01% of their portfolio BALTIMORE, MD 41,04941.0k $166.2k $166.2k 0.01% New
62 Phoenix Financial Ltd. 0.00% of their portfolio Givatayim, L3 35,71435.7k $144.6k $144.6k 0.00% Unchanged
63 Lavaca Capital LLC 0.02% of their portfolio HOUSTON, TX 35,57335.6k $144.1k $144.1k 0.02% New
64 Y-Intercept (Hong Kong) Ltd 0.00% of their portfolio HONG KONG, K3 35,54935.5k $144.0k $144.0k 0.00% New
65 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 34,89634.9k $141.3k $141.3k 0.00% Reduced -50.8k -50,760
66 PRELUDE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio NEW YORK, NY 31,88131.9k $129.1k $129.1k 0.01% New
67 Claret Asset Management Corp 0.01% of their portfolio MONTREAL, A8 30,37530.4k $123.0k $123.0k 0.01% Unchanged
68 NewEdge Advisors, LLC 0.00% of their portfolio NEW ORLEANS, LA 27,89927.9k $113.0k $113.0k 0.00% Reduced -400 -400
69 Verition Fund Management LLC 0.00% of their portfolio GREENWICH, CT 26,80326.8k $108.6k $108.6k 0.00% Unchanged
70 Olympiad Research LP 0.22% of their portfolio Stamford, CT 25,73625.7k $104.2k $104.2k 0.22% New
71 CIBC WORLD MARKET INC. 0.00% of their portfolio TORONTO, A6 25,30025.3k $102.5k $102.5k 0.00% Reduced -251 -251
72 FIL Ltd 0.00% of their portfolio HAMILTON, D0 22,90822.9k $93.4k $93.4k 0.00% Reduced -8.1k -8,053
73 Empirical Financial Services, LLC d.b.a. Empirical Wealth Management 0.00% of their portfolio Seattle, WA 21,77321.8k $88.2k $88.2k 0.00% Unchanged
74 Net Worth Advisory Group 0.02% of their portfolio SANDY, UT 20,83320.8k $84.4k $84.4k 0.02% Reduced -1.6k -1,555
75 Federation des caisses Desjardins du Quebec 0.00% of their portfolio LEVIS, A8 18,36018.4k $73.8k $73.8k 0.00% Unchanged
76 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 11,22311.2k $45.5k $45.5k 0.00% Added +416 +416
77 Aquatic Capital Management LLC 0.00% of their portfolio CHICAGO, IL 11,17311.2k $45.3k $45.3k 0.00% Reduced -36.1k -36,084
78 EJF Capital LP 0.03% of their portfolio Arlington, VA 11,00011.0k $44.5k $44.5k 0.03% Unchanged
79 SG Americas Securities, LLC 0.00% of their portfolio NEW YORK, NY 10,88610.9k $44.0k $44.0k 0.00% New
80 TORONTO DOMINION BANK 0.00% of their portfolio TORONTO, ONTARIO, A6 10,00010.0k $41.0k $41.0k 0.00% Reduced -16.2k -16,178
81 ELEMENT POINTE ADVISORS, LLC 0.01% of their portfolio MIAMI, FL 10,00010.0k $40.5k $40.5k 0.01% Unchanged
82 UBS Group AG 0.00% of their portfolio ZURICH, V8 8,2948.3k $33.6k $33.6k 0.00% Reduced -298.7k -298,663
83 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 6,8496.8k $27.9k $27.9k 0.00% Added +3.6k +3,613
84 TD Waterhouse Canada Inc. 0.00% of their portfolio TORONTO, A6 6,7006.7k $25.6k $25.6k 0.00% Added +2.0k +2,000
85 Aviso Financial Inc. 0.00% of their portfolio TORONTO, A6 6,1646.2k $25.1k $25.1k 0.00% Added +131 +131
86 ASSETMARK, INC 0.00% of their portfolio CONCORD, CA 2,5002.5k $10.1k $10.1k 0.00% Unchanged
87 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 1,6821.7k $6.8k $6.8k 0.00% Reduced -1 -1
88 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 878878 $3.7k $3.7k 0.00% New
89 FNY Investment Advisers, LLC 0.00% of their portfolio NEW YORK, NY 830830 $3.0k $3.0k 0.00% Reduced -64.5k -64,458
90 Caitong International Asset Management Co., Ltd 0.00% of their portfolio HONG KONG, K3 128128 $518 $518 0.00% New
91 Physician Wealth Advisors, Inc. 0.00% of their portfolio MIDVALE, UT 111111 $450 $450 0.00% New
92 Arlington Trust Co LLC 0.00% of their portfolio BIRMINGHAM, AL 100100 $405 $405 0.00% Unchanged
93 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 7878 $316 $316 0.00% Reduced -3.8k -3,777
94 Basepoint Wealth LLC 0.00% of their portfolio CEDAR RAPIDS, IA 5151 $208 $208 0.00% Unchanged
95 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 5050 $203 $203 0.00% Reduced -1 -1