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Algoma Steel Group Inc.

ASTL
Exchange
Nasdaq
Industry
Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens)
SEC CIK
0001860805

No open-market purchases or sales by Algoma Steel Group Inc. insiders were filed in the last 90 days; 95 institutions reported holding it in 13F filings for Q2 2026, worth $291.8M in total; no superinvestor holds it.

Other share classesASTLW

Q4 2025 vs. Q3 2025

How the institutions holding Algoma Steel Group Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025All holders in Q3 2025

13F holders of ASTL: Q3 2025 compared with Q4 2025
MeasureQ3 2025Of which not filed for Q4 2025Q4 2025Change
Holders1183109−6
Shares77.2M469.6K83.1M+6.40M (+8.3%)
Value$274.8M$1.67M$346.2M+$73.1M (+26.8%)

3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (24)

Institutions that held Algoma Steel Group Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to ASTL in Q4 2025
InstitutionSharesValue% of portfolio
Connor, Clark & Lunn Investment Management Ltd.2,264,863$9.32M0.02%
CDC Financial, Inc.1,580,749$6.48M5.99%
Verition Fund Management LLC1,248,802$5.12M0.03%
Prescott Group Capital Management, L.L.C.231,219$948.0K0.09%
Aristeia Capital LLC120,260$493.1K0.01%
Simplex Trading, LLC74,128$303.9K0.01%
Two Sigma Advisers, LP73,600$301.8K0.00%
PenderFund Capital Management Ltd.50,000$205.8K0.03%
Gsa Capital Partners LLP42,489$174.0K0.01%
Voleon Capital Management LP40,086$164.4K0.00%
PharVision Advisers, LLC32,839$134.6K0.07%
Clear Harbor Asset Management, LLC26,000$106.6K0.01%
Allianz Asset Management GmbH21,822$89.9K0.00%
FIL Ltd20,570$84.7K0.00%
Walleye Trading LLC16,374$67.1K0.00%
JustInvest LLC10,798$44.3K0.00%
Two Sigma Securities, LLC10,274$42.1K0.01%
Element Pointe Advisors, LLC10,000$41.0K0.01%
Aquatic Capital Management LLC8,809$36.1K0.00%
Caption Management, LLC7,456$30.6K0.00%
Quarry LP2,426$9.95K0.00%
The PNC Financial Services Group, Inc.243$9960.00%
Basepoint Wealth LLC51$2100.00%
Larson Financial Group LLC11$450.00%

Sold out (30)

Institutions that held Algoma Steel Group Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Not filed for Q4 2025 yet (3)

Institutions that held Algoma Steel Group Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ASTL in Q3 2025 that haven't filed for Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Cubist Systematic Strategies, LLC464,682$1.65M
Point72 Asia (Singapore) Pte. Ltd.3,600$12.8K
Shell Asset Management Co1,279$5.00K