Maple Rock Capital Partners Inc. - Aug 28, 2025 SCHEDULE 13G Report for Algoma Steel Group Inc. Common Shares, no par value (ASTL)

Filing Manager: Maple Rock Capital Partners Inc.
Reporting Manager: Maple Rock Capital Partners Inc.
Security: Algoma Steel Group Inc. Common Shares, no par value
Symbol: ASTL
Shares outstanding: 105M shares
Disclosed Ownership: 10.4M shares
Ownership: 9.9%
Form type: SCHEDULE 13G
Date filed: 8/28/2025, 06:57 PM
Date of event: Aug 28, 2025
Previous filing: Aug 14, 2025
Next filing: Nov 7, 2025
SEC: View on sec.gov

Reporting Managers (2)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Maple Rock Capital Partners Inc.	9.9%	10.4M	10.4M	0	/s/ Stephen D. Lane	Stephen D. Lane, Chief Financial Officer
Xavier Majic	9.9%	10.4M	10.4M	0	/s/ Xavier Majic	Xavier Majic