Vault-13

ALGOMA STL GROUP INC ASTL

COM · Common Stock · CUSIP 015658107 · ISIN CA0156581070

109 institutional holders -9 vs Q3 2025
83,122,54883.1m shares reported held*
79.2% of all shares outstanding*
$346.1mreported value*
23 new 40 added 27 reduced 29 sold out net bought ≈ $20.0m (+4.9m 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 ($281.2k this quarter). Holder counts are more reliable. Shares outstanding: 104.9m as of 2025-12-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $4.16. Options: 12 managers hold calls ($9.5m notional), 14 hold puts ($6.9m).

Trends to Q4 2025

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: 109109Q3 22Q2 23Q1 24Q4 24Q4 25
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

Buyers vs sellers

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

Bought or addedCut or sold out
1000100Q1 24: 41 bought or addedQ1 24: 63 cut or sold outQ2 24: 52 bought or addedQ2 24: 46 cut or sold outQ2 24Q3 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 25
Numbers
QuarterBought or addedCut or sold out
Q1 20244163
Q2 20245246
Q3 20246356
Q4 20246256
Q1 20256262
Q2 20255967
Q3 20256065
Q4 20256356

Calls vs puts

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

CallsPuts
$0$10m$20m$30m$40mQ1 25 calls: $5.4mQ1 25 puts: $4.9mQ1 25P/C 0.90Q2 25 calls: $31.8mQ2 25 puts: $7.1mQ2 25P/C 0.22Q3 25 calls: $6.3mQ3 25 puts: $6.6mQ3 25P/C 1.05Q4 25 calls: $9.5mQ4 25 puts: $6.9mQ4 25P/C 0.73
Numbers
QuarterCallsPutsP/C
Q1 2025$5.4m$4.9m0.90
Q2 2025$31.8m$7.1m0.22
Q3 2025$6.3m$6.6m1.05
Q4 2025$9.5m$6.9m0.73

Biggest buyers

Maple Rock Capital Partners Inc. Added +4,000,000+4.0m
MMCAP International Inc. SPC Added +3,409,033+3.4m
Connor, Clark & Lunn Investment Management Ltd. New +2,264,863+2.3m
TD Asset Management Inc Added +1,571,184+1.6m
Verition Fund Management LLC New +1,248,802+1.2m
BlackRock, Inc. Added +1,168,799+1.2m
LITTLEJOHN & CO LLC Added +752,616+752.6k
UBS Group AG Added +371,288+371.3k
LM Asset Management Inc. Added +320,000+320.0k
Walleye Capital LLC Added +258,279+258.3k

Biggest sellers

J. Goldman & Co LP Sold out -2,263,011-2.3m
CONTRARIAN CAPITAL MANAGEMENT, L.L.C. Sold out -2,037,686-2.0m
AYAL Capital Advisors Ltd Sold out -1,467,000-1.5m
Amitell Capital Pte Ltd Sold out -864,585-864.6k
HEARTLAND ADVISORS INC Sold out -600,000-600.0k
Quadrature Capital Ltd Reduced -511,000-511.0k
Scheer, Rowlett & Associates Investment Management Ltd. Reduced -492,404-492.4k
ROYAL BANK OF CANADA Reduced -387,426-387.4k
Jump Financial, LLC Reduced -343,525-343.5k
GENERAL AMERICAN INVESTORS CO INC Sold out -280,136-280.1k

Biggest calls

CDC Financial, Inc. First filing $4.6m927.6k shares
Caption Management, LLC Unchanged $920.5k224.5k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $856.9k209.0k shares
JANE STREET GROUP, LLC Reduced $836.4k204.0k shares
SIG North Trading, ULC Added $633.0k154.4k shares
SIMPLEX TRADING, LLC Reduced $547.8k133.6k shares
CITADEL ADVISORS LLC Reduced $470.3k114.7k shares
Walleye Capital LLC Added $289.1k70.5k shares
NOMURA HOLDINGS INC New $163.6k39.9k shares
Walleye Trading LLC Added $127.1k31.0k shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $1.5m364.6k shares
SIMPLEX TRADING, LLC Reduced $1.3m312.1k shares
CITADEL ADVISORS LLC Reduced $1.0m244.2k shares
Caption Management, LLC Added $553.5k135.0k shares
NOMURA HOLDINGS INC New $548.6k133.8k shares
MILLENNIUM MANAGEMENT LLC Reduced $460.8k112.4k shares
WOLVERINE ASSET MANAGEMENT LLC Unchanged $433.0k105.6k shares
SIG North Trading, ULC Reduced $407.5k99.4k shares
IMC-Chicago, LLC Reduced $322.7k78.7k shares
Walleye Capital LLC Reduced $114.0k27.8k 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 in Q4 2025

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 in Q4 2025.

Holders, Q4 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Maple Rock Capital Partners Inc. 1.95% of their portfolio Toronto, A6 14,430,81814.4m $59.2m $59.2m 1.95% Added +4.0m +4,000,000
2 MMCAP International Inc. SPC 4.71% of their portfolio GRAND CAYMAN, E9 11,487,86111.5m $47.1m $47.1m 4.71% Added +3.4m +3,409,033
3 BlackRock, Inc. 0.00% of their portfolio New York, NY 8,501,9038.5m $34.9m $34.9m 0.00% Added +1.2m +1,168,799
4 DONALD SMITH & CO., INC. 0.45% of their portfolio NEW YORK, NY 5,861,6315.9m $24.0m $24.0m 0.45% Reduced -75.4k -75,389
5 LITTLEJOHN & CO LLC 7.36% of their portfolio GREENWICH, CT 3,446,5033.4m $14.1m $14.1m 7.36% Added +752.6k +752,616
6 Scheer, Rowlett & Associates Investment Management Ltd. 0.94% of their portfolio TORONTO, A6 3,336,5253.3m $13.7m $13.7m 0.94% Reduced -492.4k -492,404
7 INVESCO SENIOR SECURED MANAGEMENT INC /ADV 44.65% of their portfolio NEW YORK, NY 3,233,1173.2m $18.3m $18.3m 44.65% Unchanged
8 GOLDENTREE ASSET MANAGEMENT LP 0.55% of their portfolio NEW YORK, NY 2,493,5482.5m $10.2m $10.2m 0.55% Unchanged
9 Connor, Clark & Lunn Investment Management Ltd. 0.02% of their portfolio VANCOUVER, A1 2,264,8632.3m $9.3m $9.3m 0.02% New
10 FMR LLC 0.00% of their portfolio BOSTON, MA 2,208,6462.2m $9.1m $9.1m 0.00% Reduced -6.0k -6,000
11 AEGIS FINANCIAL CORP 1.75% of their portfolio MC LEAN, VA 1,786,1221.8m $7.3m $7.3m 1.75% Unchanged
12 TD Asset Management Inc 0.01% of their portfolio Toronto, A6 1,687,4201.7m $7.0m $7.0m 0.01% Added +1.6m +1,571,184
13 CDC Financial, Inc. 5.69% of their portfolio CHICAGO, IL 1,580,7491.6m $6.5m $6.5m 5.69% First filing
14 LM Asset Management Inc. 4.82% of their portfolio VANCOUVER, A1 1,470,0001.5m $6.0m $6.0m 4.82% Added +320.0k +320,000
15 Verition Fund Management LLC 0.03% of their portfolio GREENWICH, CT 1,248,8021.2m $5.1m $5.1m 0.03% New
16 Solas Capital Management, LLC 2.49% of their portfolio DARIEN, CT 1,069,3511.1m $4.4m $4.4m 2.49% Reduced -21.9k -21,897
17 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 1,040,5391.0m $4.3m $4.3m 0.00% Reduced -251.6k -251,564
18 Quadrature Capital Ltd 0.04% of their portfolio LONDON, X0 1,018,1001.0m $4.2m $4.2m 0.04% Reduced -511.0k -511,000
19 UBS Group AG 0.00% of their portfolio ZURICH, V8 944,764944.8k $3.9m $3.9m 0.00% Added +371.3k +371,288
20 Bracebridge Capital, LLC 1.38% of their portfolio BOSTON, MA 924,931924.9k $3.8m $3.8m 1.38% Unchanged
21 JB CAPITAL PARTNERS LP 0.62% of their portfolio Armonk, NY 872,277872.3k $3.6m $3.6m 0.62% Reduced -119.9k -119,900
22 Bain Capital Credit, LP 0.89% of their portfolio Boston, MA 825,777825.8k $3.4m $3.4m 0.89% Reduced -11.4k -11,435
23 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 702,734702.7k $2.9m $2.9m 0.00% Added +192.6k +192,581
24 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 701,942701.9k $2.9m $2.9m 0.00% Reduced -125.3k -125,308
25 TCW GROUP INC 0.02% of their portfolio LOS ANGELES, CA 672,678672.7k $2.8m $2.8m 0.02% Unchanged
26 READYSTATE ASSET MANAGEMENT LP 0.12% of their portfolio CHICAGO, IL 640,324640.3k $2.6m $2.6m 0.12% Unchanged
27 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 622,404622.4k $2.6m $2.6m 0.00% Added +38.0k +38,044
28 Ewing Morris & Co. Investment Partners Ltd. 1.11% of their portfolio TORONTO, Z4 612,500612.5k $2.6m $2.6m 1.11% Added +122.5k +122,500
29 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 596,960597.0k $2.5m $2.5m 0.00% Reduced -107.4k -107,420
30 Walleye Capital LLC 0.01% of their portfolio NEW YORK, NY 537,234537.2k $2.2m $2.2m 0.01% Added +258.3k +258,279
31 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 523,258523.3k $2.1m $2.1m 0.00% Reduced -55.2k -55,202
32 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 522,357522.4k $2.1m $2.1m 0.00% Added +250.4k +250,352
33 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 401,490401.5k $1.6m $1.6m 0.00% Added +20.9k +20,892
34 CenterBook Partners LP 0.08% of their portfolio GREENWICH, CT 398,845398.8k $1.6m $1.6m 0.08% Added +164.5k +164,528
35 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 383,587383.6k $1.6m $1.6m 0.00% Reduced -116.5k -116,487
36 Orion Resource Partners LP 0.77% of their portfolio NEW YORK, NY 381,728381.7k $1.6m $1.6m 0.77% Added +242.3k +242,322
37 Prescott Group Capital Management, L.L.C. 0.09% of their portfolio Tulsa, OK 231,219231.2k $948.0k $948.0k 0.09% New
38 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 203,916203.9k $839.4k $839.4k 0.00% Added +13.8k +13,799
39 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 155,250155.2k $636.5k $636.5k 0.00% Reduced -60.2k -60,196
40 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 145,596145.6k $597.0k $597.0k 0.00% Reduced -387.4k -387,426
41 XTX Topco Ltd 0.02% of their portfolio LONDON, X0 143,704143.7k $589.2k $589.2k 0.02% Added +19.6k +19,627
42 Quinn Opportunity Partners LLC 0.03% of their portfolio CHARLOTTESVILLE, VA 142,336142.3k $583.6k $583.6k 0.03% Unchanged
43 Quantbot Technologies LP 0.02% of their portfolio NEW YORK, NY 127,847127.8k $524.2k $524.2k 0.02% Reduced -60.8k -60,750
44 ARISTEIA CAPITAL, L.L.C. 0.01% of their portfolio GREENWICH, CT 120,260120.3k $493.1k $493.1k 0.01% New
45 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 114,101114.1k $467.8k $467.8k 0.00% Added +100 +100
46 Summit Financial, LLC 0.01% of their portfolio PARSIPPANY, NJ 110,333110.3k $452.4k $452.4k 0.01% Unchanged
47 GROUP ONE TRADING LLC 0.01% of their portfolio CHICAGO, IL 103,187103.2k $423.1k $423.1k 0.01% Added +73.6k +73,564
48 SIG North Trading, ULC 0.07% of their portfolio Bala Cynwyd, PA 101,917101.9k $417.9k $417.9k 0.07% Reduced -40.0k -40,000
49 MACKENZIE FINANCIAL CORP 0.00% of their portfolio TORONTO ONTARIO, A6 94,77694.8k $384.0k $384.0k 0.00% Added +40.4k +40,413
50 FNY Investment Advisers, LLC 0.10% of their portfolio NEW YORK, NY 85,99386.0k $352.0k $352.0k 0.10% Added +81.5k +81,463
51 Senvest Management, LLC 0.01% of their portfolio New York, NY 85,78985.8k $351.7k $351.7k 0.01% Reduced -189.3k -189,300
52 NOMURA HOLDINGS INC 0.00% of their portfolio TOKYO, M0 84,56784.6k $346.7k $346.7k 0.00% Added +38.6k +38,567
53 PDT Partners, LLC 0.02% of their portfolio New York, NY 78,80478.8k $323.1k $323.1k 0.02% Added +18.8k +18,814
54 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 77,50877.5k $317.8k $317.8k 0.00% Added +66.2k +66,231
55 Lighthouse Investment Partners, LLC 0.01% of their portfolio Palm Beach Gardens, FL 75,70875.7k $310.4k $310.4k 0.01% Added +53.6k +53,619
56 SIMPLEX TRADING, LLC 0.01% of their portfolio CHICAGO, IL 74,12874.1k $303.9k $303.9k 0.01% New
57 TWO SIGMA ADVISERS, LP 0.00% of their portfolio NEW YORK, NY 73,60073.6k $301.8k $301.8k 0.00% New
58 WOLVERINE ASSET MANAGEMENT LLC 0.00% of their portfolio CHICAGO, IL 72,14372.1k $295.8k $295.8k 0.00% Added +17.4k +17,360
59 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 69,17269.2k $284.7k $284.7k 0.00% Added +30.5k +30,547
60 Boston Partners 0.00% of their portfolio BOSTON, MA 68,59868.6k $281.2k $281.2k 0.00% Added +15.2k +15,175
61 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 66,71366.7k $273.5k $273.5k 0.00% Added +14.4k +14,415
62 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 64,38064.4k $264.0k $264.0k 0.00% Reduced -82.8k -82,816
63 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 63,81363.8k $261.6k $261.6k 0.00% Unchanged
64 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 62,19462.2k $255.0k $255.0k 0.00% Added +3.3k +3,300
65 Terril Brothers, Inc. 0.06% of their portfolio St. Louis, MO 58,00058.0k $237.8k $237.8k 0.06% Added +16.5k +16,500
66 WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio PLYMOUTH, MN 55,00055.0k $228.2k $228.2k 0.00% Unchanged
67 PenderFund Capital Management Ltd. 0.03% of their portfolio VANCOUVER, A1 50,00050.0k $205.8k $205.8k 0.03% New
68 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 46,24646.2k $189.6k $189.6k 0.00% Added +45.9k +45,877
69 GSA CAPITAL PARTNERS LLP 0.01% of their portfolio LONDON, X0 42,48942.5k $174.0k $174.0k 0.01% New
70 Voleon Capital Management LP 0.00% of their portfolio BERKELEY, CA 40,08640.1k $164.4k $164.4k 0.00% New
71 Phoenix Financial Ltd. 0.00% of their portfolio Givatayim, L3 35,71435.7k $146.4k $146.4k 0.00% Reduced -35.7k -35,714
72 Legal & General Group Plc 0.00% of their portfolio London, X0 33,33033.3k $137.4k $137.4k 0.00% Reduced -55.3k -55,253
73 PharVision Advisers, LLC 0.07% of their portfolio BOCA RATON, FL 32,83932.8k $134.6k $134.6k 0.07% New
74 CIBC WORLD MARKET INC. 0.00% of their portfolio TORONTO, A6 32,42532.4k $132.9k $132.9k 0.00% Reduced -33.9k -33,890
75 Claret Asset Management Corp 0.01% of their portfolio MONTREAL, A8 30,37530.4k $125.0k $125.0k 0.01% Unchanged
76 Corient Private Wealth LP 0.00% of their portfolio MIAMI, FL 30,00030.0k $123.0k $123.0k 0.00% Added +15.0k +15,000
77 NewEdge Advisors, LLC 0.00% of their portfolio NEW ORLEANS, LA 28,29928.3k $116.0k $116.0k 0.00% Unchanged
78 ExodusPoint Capital Management, LP 0.00% of their portfolio NEW YORK, NY 26,34026.3k $108.0k $108.0k 0.00% Reduced -69.9k -69,923
79 Clear Harbor Asset Management, LLC 0.01% of their portfolio Stamford, CT 26,00026.0k $106.6k $106.6k 0.01% New
80 Net Worth Advisory Group 0.02% of their portfolio SANDY, UT 23,64323.6k $96.9k $96.9k 0.02% Reduced -754 -754
81 Allianz Asset Management GmbH 0.00% of their portfolio MUNICH, 2M 21,82221.8k $89.9k $89.9k 0.00% New
82 Empirical Financial Services, LLC d.b.a. Empirical Wealth Management 0.00% of their portfolio Seattle, WA 21,77321.8k $89.3k $89.3k 0.00% Unchanged
83 DekaBank Deutsche Girozentrale 0.00% of their portfolio FRANKFURT, 2M 21,18821.2k $180.0k $180.0k 0.00% Unchanged
84 FIL Ltd 0.00% of their portfolio HAMILTON, D0 20,57020.6k $84.7k $84.7k 0.00% New
85 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 19,40019.4k $79.0k $79.0k 0.00% Reduced -43.3k -43,300
86 Federation des caisses Desjardins du Quebec 0.00% of their portfolio LEVIS, A8 17,86017.9k $73.2k $73.2k 0.00% Added +9.0k +9,000
87 NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio MONTREAL, A8 17,57517.6k $71.6k $71.6k 0.00% Added +6.9k +6,939
88 Walleye Trading LLC 0.00% of their portfolio NEW YORK, NY 16,37416.4k $67.1k $67.1k 0.00% New
89 Jump Financial, LLC 0.00% of their portfolio Chicago, IL 14,20114.2k $58.2k $58.2k 0.00% Reduced -343.5k -343,525
90 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 11,07911.1k $45.4k $45.4k 0.00% Added +224 +224
91 EJF Capital LP 0.03% of their portfolio Arlington, VA 11,00011.0k $45.1k $45.1k 0.03% Unchanged
92 Vanguard Personalized Indexing Management, LLC 0.00% of their portfolio OAKLAND, CA 10,79810.8k $44.3k $44.3k 0.00% New
93 TWO SIGMA SECURITIES, LLC 0.01% of their portfolio NEW YORK, NY 10,27410.3k $42.1k $42.1k 0.01% New
94 TORONTO DOMINION BANK 0.00% of their portfolio TORONTO, ONTARIO, A6 10,06010.1k $41.2k $41.2k 0.00% Added +60 +60
95 ELEMENT POINTE ADVISORS, LLC 0.01% of their portfolio MIAMI, FL 10,00010.0k $41.0k $41.0k 0.01% New
96 Aquatic Capital Management LLC 0.00% of their portfolio CHICAGO, IL 8,8098.8k $36.1k $36.1k 0.00% New
97 Caption Management, LLC 0.00% of their portfolio OKLAHOMA CITY, OK 7,4567.5k $30.6k $30.6k 0.00% New
98 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 7,1207.1k $29.3k $29.3k 0.00% Added +3.7k +3,722
99 Aviso Financial Inc. 0.00% of their portfolio TORONTO, A6 6,5596.6k $27.0k $27.0k 0.00% Reduced -90 -90
100 Quarry LP 0.00% of their portfolio NEW YORK, NY 2,4262.4k $9.9k $9.9k 0.00% New