Vault-13

ALGOMA STL GROUP INC ASTL

COM · Common Stock · CUSIP 015658107 · ISIN CA0156581070

118 institutional holders -10 vs Q2 2025
76,992,54177.0m shares reported held*
73.4% of all shares outstanding*
$274.0mreported value*
22 new 38 added 34 reduced 31 sold out net sold ≈ $10.8m (-3.1m 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 ($903.2k 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 ≈ $3.56. Options: 13 managers hold calls ($6.3m notional), 14 hold puts ($6.6m).

Trends to Q3 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: 118118Q3 22Q2 23Q1 24Q4 24Q3 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

Buyers vs sellers

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

Bought or addedCut or sold out
1000100Q4 23: 59 bought or addedQ4 23: 51 cut or sold outQ1 24: 41 bought or addedQ1 24: 63 cut or sold outQ1 24Q2 24: 52 bought or addedQ2 24: 46 cut or sold outQ3 24: 63 bought or addedQ3 24: 56 cut or sold outQ3 24Q4 24: 62 bought or addedQ4 24: 56 cut or sold outQ1 25: 62 bought or addedQ1 25: 62 cut or sold outQ1 25Q2 25: 59 bought or addedQ2 25: 67 cut or sold outQ3 25: 60 bought or addedQ3 25: 65 cut or sold outQ3 25
Numbers
QuarterBought or addedCut or sold out
Q4 20235951
Q1 20244163
Q2 20245246
Q3 20246356
Q4 20246256
Q1 20256262
Q2 20255967
Q3 20256065

Calls vs puts

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

CallsPuts
$0$10m$20m$30m$40mQ4 24 calls: $23.4mQ4 24 puts: $4.7mQ4 24P/C 0.20Q1 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 1.05
Numbers
QuarterCallsPutsP/C
Q4 2024$23.4m$4.7m0.20
Q1 2025$5.4m$4.9m0.90
Q2 2025$31.8m$7.1m0.22
Q3 2025$6.3m$6.6m1.05

Biggest buyers

Maple Rock Capital Partners Inc. Added +2,034,018+2.0m
Quadrature Capital Ltd Added +1,518,530+1.5m
BlackRock, Inc. Added +948,061+948.1k
MORGAN STANLEY Added +886,902+886.9k
MMCAP International Inc. SPC Added +860,610+860.6k
JANE STREET GROUP, LLC New +827,250+827.2k
D. E. Shaw & Co., Inc. New +578,460+578.5k
MILLENNIUM MANAGEMENT LLC Added +563,628+563.6k
Cubist Systematic Strategies, LLC New +464,682+464.7k
LITTLEJOHN & CO LLC Added +419,915+419.9k

Biggest sellers

INTACT INVESTMENT MANAGEMENT INC. Sold out -2,007,006-2.0m
FMR LLC Reduced -1,738,200-1.7m
Connor, Clark & Lunn Investment Management Ltd. Sold out -1,570,953-1.6m
CONTRARIAN CAPITAL MANAGEMENT, L.L.C. Reduced -1,534,332-1.5m
TOWLE & CO Sold out -1,463,161-1.5m
TD Asset Management Inc Reduced -1,247,064-1.2m
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Sold out -1,134,086-1.1m
NewGen Asset Management Ltd Reduced -886,812-886.8k
GENERAL AMERICAN INVESTORS CO INC Reduced -535,920-535.9k
Empyrean Capital Partners, LP Sold out -452,148-452.1k

Biggest calls

GROUP ONE TRADING LLC Added $1.2m328.2k shares
Caption Management, LLC Reduced $798.1k224.5k shares
JANE STREET GROUP, LLC Reduced $782.8k220.2k shares
CITADEL ADVISORS LLC Reduced $669.8k188.4k shares
SIMPLEX TRADING, LLC Added $609.0k171.5k shares
J. Goldman & Co LP New $575.2k161.8k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $533.3k149.8k shares
SIG North Trading, ULC Added $454.3k127.6k shares
TUDOR INVESTMENT CORP ET AL New $444.4k125.0k shares
Walleye Capital LLC Reduced $113.0k31.8k shares

Biggest puts

SIMPLEX TRADING, LLC Added $1.3m353.5k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $1.2m326.8k shares
CITADEL ADVISORS LLC Added $1.1m297.4k shares
MILLENNIUM MANAGEMENT LLC Added $679.4k191.1k shares
SIG North Trading, ULC Added $558.2k156.8k shares
IMC-Chicago, LLC Added $411.7k115.8k shares
WOLVERINE ASSET MANAGEMENT LLC Unchanged $375.4k105.6k shares
Caption Management, LLC New $363.3k102.2k shares
Walleye Capital LLC Reduced $213.3k60.0k shares
WOLVERINE TRADING, LLC New $208.2k50.9k 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 Q3 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 Q3 2025.

Holders, Q3 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Maple Rock Capital Partners Inc. 1.50% of their portfolio Toronto, A6 10,430,81810.4m $37.1m $37.1m 1.50% Added +2.0m +2,034,018
2 MMCAP International Inc. SPC 3.34% of their portfolio GRAND CAYMAN, E9 8,078,8288.1m $28.7m $28.7m 3.34% Added +860.6k +860,610
3 BlackRock, Inc. 0.00% of their portfolio New York, NY 7,333,1047.3m $26.1m $26.1m 0.00% Added +948.1k +948,061
4 DONALD SMITH & CO., INC. 0.42% of their portfolio NEW YORK, NY 5,937,0205.9m $21.1m $21.1m 0.42% Reduced -103.1k -103,148
5 Scheer, Rowlett & Associates Investment Management Ltd. 0.81% of their portfolio TORONTO, A6 3,828,9293.8m $13.6m $13.6m 0.81% Reduced -69.3k -69,276
6 INVESCO SENIOR SECURED MANAGEMENT INC /ADV 35.04% of their portfolio NEW YORK, NY 3,233,1173.2m $11.5m $11.5m 35.04% Unchanged
7 LITTLEJOHN & CO LLC 4.83% of their portfolio GREENWICH, CT 2,693,8872.7m $9.6m $9.6m 4.83% Added +419.9k +419,915
8 GOLDENTREE ASSET MANAGEMENT LP 0.73% of their portfolio NEW YORK, NY 2,493,5482.5m $8.9m $8.9m 0.73% Unchanged
9 J. Goldman & Co LP 0.30% of their portfolio NEW YORK, NY 2,263,0112.3m $8.0m $8.0m 0.30% Added +26.6k +26,638
10 FMR LLC 0.00% of their portfolio BOSTON, MA 2,214,6462.2m $7.9m $7.9m 0.00% Reduced -1.7m -1,738,200
11 CONTRARIAN CAPITAL MANAGEMENT, L.L.C. 1.83% of their portfolio Greenwich, CT 2,037,6862.0m $7.2m $7.2m 1.83% Reduced -1.5m -1,534,332
12 AEGIS FINANCIAL CORP 2.43% of their portfolio MC LEAN, VA 1,786,1221.8m $6.3m $6.3m 2.43% Unchanged
13 Quadrature Capital Ltd 0.06% of their portfolio LONDON, X0 1,529,1001.5m $5.4m $5.4m 0.06% Added +1.5m +1,518,530
14 AYAL Capital Advisors Ltd 3.01% of their portfolio Toronto, A6 1,467,0001.5m $5.2m $5.2m 3.01% Added +375.0k +375,000
15 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 1,292,1031.3m $4.6m $4.6m 0.00% Added +886.9k +886,902
16 LM Asset Management Inc. 3.25% of their portfolio VANCOUVER, A1 1,150,0001.1m $4.1m $4.1m 3.25% Added +260.0k +260,000
17 Solas Capital Management, LLC 2.37% of their portfolio DARIEN, CT 1,091,2481.1m $3.9m $3.9m 2.37% Reduced -340.7k -340,688
18 JB CAPITAL PARTNERS LP 0.60% of their portfolio Armonk, NY 992,177992.2k $3.5m $3.5m 0.60% Unchanged
19 Bracebridge Capital, LLC 1.37% of their portfolio BOSTON, MA 924,931924.9k $3.3m $3.3m 1.37% Unchanged
20 Amitell Capital Pte Ltd 2.27% of their portfolio SINGAPORE, U0 864,585864.6k $3.1m $3.1m 2.27% Reduced -215.5k -215,457
21 Bain Capital Credit, LP 0.94% of their portfolio Boston, MA 837,212837.2k $3.0m $3.0m 0.94% Unchanged
22 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 827,250827.2k $2.9m $2.9m 0.00% New
23 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 704,380704.4k $2.5m $2.5m 0.00% Added +563.6k +563,628
24 TCW GROUP INC 0.02% of their portfolio LOS ANGELES, CA 672,678672.7k $2.4m $2.4m 0.02% Reduced -446.5k -446,543
25 READYSTATE ASSET MANAGEMENT LP 0.11% of their portfolio CHICAGO, IL 640,324640.3k $2.3m $2.3m 0.11% Added +75.1k +75,099
26 HEARTLAND ADVISORS INC 0.11% of their portfolio MILWAUKEE, WI 600,000600.0k $2.1m $2.1m 0.11% Added +100.0k +100,000
27 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 584,360584.4k $2.1m $2.1m 0.00% Added +263.5k +263,458
28 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 578,460578.5k $2.1m $2.1m 0.00% New
29 UBS Group AG 0.00% of their portfolio ZURICH, V8 573,476573.5k $2.0m $2.0m 0.00% Added +404.1k +404,139
30 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 533,022533.0k $1.9m $1.9m 0.00% Added +325.3k +325,302
31 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 510,153510.2k $1.8m $1.8m 0.00% Added +118.7k +118,722
32 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 500,074500.1k $1.8m $1.8m 0.00% Added +68.3k +68,349
33 Ewing Morris & Co. Investment Partners Ltd. 0.74% of their portfolio TORONTO, Z4 490,000490.0k $1.7m $1.7m 0.74% Added +100.0k +100,000
34 Cubist Systematic Strategies, LLC 0.02% of their portfolio STAMFORD, CT 464,682464.7k $1.7m $1.7m 0.02% New
35 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 380,598380.6k $1.4m $1.4m 0.00% Reduced -17.4k -17,439
36 Jump Financial, LLC 0.02% of their portfolio Chicago, IL 357,726357.7k $1.3m $1.3m 0.02% New
37 GENERAL AMERICAN INVESTORS CO INC 0.06% of their portfolio NEW YORK, NY 280,136280.1k $995.9k $995.9k 0.06% Reduced -535.9k -535,920
38 Walleye Capital LLC 0.01% of their portfolio NEW YORK, NY 278,955279.0k $991.7k $991.7k 0.01% New
39 Senvest Management, LLC 0.03% of their portfolio New York, NY 275,089275.1k $977.9k $977.9k 0.03% Unchanged
40 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 272,005272.0k $967.0k $967.0k 0.00% Added +75.6k +75,641
41 NewGen Asset Management Ltd 0.64% of their portfolio TORONTO, A6 246,097246.1k $1.0m $1.0m 0.64% Reduced -886.8k -886,812
42 CenterBook Partners LP 0.04% of their portfolio GREENWICH, CT 234,317234.3k $833.0k $833.0k 0.04% Reduced -53.3k -53,273
43 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 216,333216.3k $769.1k $769.1k 0.00% Added +158.9k +158,933
44 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 215,446215.4k $765.9k $765.9k 0.00% Reduced -264.6k -264,553
45 HITE Hedge Asset Management LLC 0.04% of their portfolio BRAINTREE, MA 214,556214.6k $762.7k $762.7k 0.04% Unchanged
46 MOORE CAPITAL MANAGEMENT, LP 0.02% of their portfolio NEW YORK, NY 212,331212.3k $754.8k $754.8k 0.02% Unchanged
47 Point72 Asset Management, L.P. 0.00% of their portfolio STAMFORD, CT 201,100201.1k $714.7k $714.7k 0.00% New
48 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 190,117190.1k $676.8k $676.8k 0.00% Added +102.5k +102,460
49 Quantbot Technologies LP 0.02% of their portfolio NEW YORK, NY 188,597188.6k $670.5k $670.5k 0.02% Added +105.4k +105,428
50 Swiss National Bank 0.00% of their portfolio ZURICH, V8 164,107164.1k $582.8k $582.8k 0.00% Reduced -7.4k -7,400
51 VAN ECK ASSOCIATES CORP 0.00% of their portfolio NEW YORK, NY 158,682158.7k $564.0k $564.0k 0.00% Added +62.6k +62,590
52 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 147,196147.2k $523.3k $523.3k 0.00% Added +31.9k +31,938
53 Quinn Opportunity Partners LLC 0.04% of their portfolio CHARLOTTESVILLE, VA 142,336142.3k $506.0k $506.0k 0.04% Reduced -34.0k -34,006
54 SIG North Trading, ULC 0.08% of their portfolio Bala Cynwyd, PA 141,917141.9k $504.5k $504.5k 0.08% New
55 Orion Resource Partners LP 0.18% of their portfolio NEW YORK, NY 139,406139.4k $494.7k $494.7k 0.18% Added +86.2k +86,213
56 Trexquant Investment LP 0.01% of their portfolio STAMFORD, CT 139,162139.2k $494.7k $494.7k 0.01% New
57 XTX Topco Ltd 0.02% of their portfolio LONDON, X0 124,077124.1k $441.1k $441.1k 0.02% New
58 TD Asset Management Inc 0.00% of their portfolio Toronto, A6 116,236116.2k $412.7k $412.7k 0.00% Reduced -1.2m -1,247,064
59 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 114,001114.0k $405.3k $405.3k 0.00% Added +112.8k +112,807
60 Summit Financial, LLC 0.01% of their portfolio PARSIPPANY, NJ 110,333110.3k $392.8k $392.8k 0.01% New
61 ExodusPoint Capital Management, LP 0.00% of their portfolio NEW YORK, NY 96,26396.3k $342.2k $342.2k 0.00% New
62 Legal & General Group Plc 0.00% of their portfolio London, X0 88,58388.6k $362.3k $362.3k 0.00% Unchanged
63 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 76,47776.5k $271.5k $271.5k 0.00% Unchanged
64 Centiva Capital, LP 0.02% of their portfolio New York, NY 71,75571.8k $255.1k $255.1k 0.02% New
65 Phoenix Financial Ltd. 0.00% of their portfolio Givatayim, L3 71,42871.4k $253.9k $253.9k 0.00% Added +35.7k +35,714
66 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 69,75169.8k $247.6k $247.6k 0.00% Unchanged
67 CIBC WORLD MARKET INC. 0.00% of their portfolio TORONTO, A6 66,31566.3k $235.8k $235.8k 0.00% Reduced -33.0k -33,030
68 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 63,81363.8k $226.9k $226.9k 0.00% Reduced -50.2k -50,176
69 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 62,70062.7k $221.0k $221.0k 0.00% Added +59.7k +59,700
70 IMC-Chicago, LLC 0.00% of their portfolio CHICAGO, IL 62,15762.2k $221.0k $221.0k 0.00% Reduced -53.1k -53,074
71 PDT Partners, LLC 0.01% of their portfolio New York, NY 59,99060.0k $213.3k $213.3k 0.01% Added +15.8k +15,818
72 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 58,89458.9k $209.4k $209.4k 0.00% Added +13.3k +13,268
73 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio COLUMBUS, OH 58,59458.6k $208.1k $208.1k 0.00% Reduced -521 -521
74 WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio PLYMOUTH, MN 55,00055.0k $201.8k $201.8k 0.00% Reduced -1.0k -1,000
75 WOLVERINE ASSET MANAGEMENT LLC 0.00% of their portfolio CHICAGO, IL 54,78354.8k $194.8k $194.8k 0.00% New
76 MACKENZIE FINANCIAL CORP 0.00% of their portfolio TORONTO ONTARIO, A6 54,36354.4k $192.9k $192.9k 0.00% Added +6.1k +6,086
77 Boston Partners 0.00% of their portfolio BOSTON, MA 53,42353.4k $189.9k $189.9k 0.00% Reduced -14.6k -14,567
78 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 52,29852.3k $185.9k $185.9k 0.00% Added +7.8k +7,847
79 OXFORD ASSET MANAGEMENT LLP 0.06% of their portfolio OXFORD, X0 47,59547.6k $169.2k $169.2k 0.06% New
80 NOMURA HOLDINGS INC 0.00% of their portfolio TOKYO, M0 46,00046.0k $163.5k $163.5k 0.00% New
81 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 43,30343.3k $153.9k $153.9k 0.00% Reduced -18.4k -18,393
82 Terril Brothers, Inc. 0.04% of their portfolio St. Louis, MO 41,50041.5k $147.5k $147.5k 0.04% Reduced -8.0k -8,000
83 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 38,62538.6k $137.1k $137.1k 0.00% Added +526 +526
84 Claret Asset Management Corp 0.01% of their portfolio MONTREAL, A8 30,37530.4k $108.0k $108.0k 0.01% Unchanged
85 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 29,62329.6k $105.3k $105.3k 0.00% Reduced -83.5k -83,457
86 Graham Capital Management, L.P. 0.00% of their portfolio ROWAYTON, CT 28,74128.7k $102.2k $102.2k 0.00% Added +10.8k +10,789
87 NewEdge Advisors, LLC 0.00% of their portfolio NEW ORLEANS, LA 28,29928.3k $100.6k $100.6k 0.00% Added +3.4k +3,400
88 PRELUDE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio NEW YORK, NY 26,75826.8k $95.1k $95.1k 0.01% New
89 Net Worth Advisory Group 0.03% of their portfolio SANDY, UT 24,39724.4k $86.7k $86.7k 0.03% Reduced -1.6k -1,563
90 Assenagon Asset Management S.A. 0.00% of their portfolio SENNINGERBERG, N4 22,68222.7k $80.6k $80.6k 0.00% New
91 Lighthouse Investment Partners, LLC 0.00% of their portfolio Palm Beach Gardens, FL 22,08922.1k $78.5k $78.5k 0.00% New
92 Empirical Financial Services, LLC d.b.a. Empirical Wealth Management 0.00% of their portfolio Seattle, WA 21,77321.8k $77.4k $77.4k 0.00% Unchanged
93 DekaBank Deutsche Girozentrale 0.00% of their portfolio FRANKFURT, 2M 21,18821.2k $178.0k $178.0k 0.00% Unchanged
94 Olympiad Research LP 0.10% of their portfolio Stamford, CT 20,75820.8k $73.8k $73.8k 0.10% New
95 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 19,32919.3k $68.7k $68.7k 0.00% Unchanged
96 Corient Private Wealth LP 0.00% of their portfolio MIAMI, FL 15,00015.0k $53.3k $53.3k 0.00% Unchanged
97 Pictet Asset Management Holding SA 0.00% of their portfolio CAROUGE, V8 13,90113.9k $49.4k $49.4k 0.00% Unchanged
98 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 11,94111.9k $42.5k $42.5k 0.00% Reduced -239 -239
99 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 11,27711.3k $39.9k $39.9k 0.00% Reduced -1.4k -1,378
100 EJF Capital LP 0.02% of their portfolio Arlington, VA 11,00011.0k $39.1k $39.1k 0.02% Unchanged