ASTL / Algoma Steel Group Inc. - Документы SEC, Годовой отчет, Доверенное заявление

Алгома Стил Групп Инк.
US ˙ NasdaqGM ˙ CA0156581070

Основная статистика
LEI 549300Q5EU337A1XCX27
CIK 1860805
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Algoma Steel Group Inc.
SEC Filings (Chronological Order)
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July 30, 2025 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

EX-99.2 Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc.

July 30, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

July 30, 2025 EX-99.1

Algoma Steel Group Inc. Reports Financial Results for the Second Quarter 2025 Consolidated Revenue of $589.7 Million Net Loss of $110.6 Million and Adjusted EBITDA Loss of $32.4 Million Achieved First Arc and First Steel Production from Transformativ

EX-99.1 Exhibit 99.1 MEDIA RELEASE July 29, 2025 Algoma Steel Group Inc. Reports Financial Results for the Second Quarter 2025 Consolidated Revenue of $589.7 Million Net Loss of $110.6 Million and Adjusted EBITDA Loss of $32.4 Million Achieved First Arc and First Steel Production from Transformative Electric Arc Furnace (EAF) Project SAULT STE. MARIE, ONTARIO (July 29, 2025) – Algoma Steel Group I

July 30, 2025 EX-99.3

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at June 30, 2025 and December 31, 2024 and for the three and six month periods ended June 30, 2025 and 2024

EX-99.3 Exhibit 99.3 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at June 30, 2025 and December 31, 2024 and for the three and six month periods ended June 30, 2025 and 2024 Algoma Steel Group Inc. Condensed Interim Consolidated Statements of Net (Loss) Income (Unaudited) Three months ended June 30, Six months ended June 30, 2025 2024 2025 2024 express

July 24, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

July 24, 2025 EX-99.1

Algoma Steel Comments on Ongoing Trade Impasse and Prolonged Tariff Environment

EX-99.1 Exhibit 99.1 MEDIA RELEASE July 24, 2025 Algoma Steel Comments on Ongoing Trade Impasse and Prolonged Tariff Environment SAULT STE. MARIE, ONTARIO (July 24, 2025) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today commented on the ongoing trade impasse and prolonged tariff

July 18, 2025 F-X

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM F-X APPOINTMENT OF AGENT FOR SERVICE OF PROCESS AND UNDERTAKING A. Name of issuer or person filing (“Filer”): ALGOMA STEEL GROUP INC. B. (1) This is [check one]:   ☒   an or

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM F-X APPOINTMENT OF AGENT FOR SERVICE OF PROCESS AND UNDERTAKING A. Name of issuer or person filing (“Filer”): ALGOMA STEEL GROUP INC. B. (1) This is [check one]:   ☒   an original filing for the Filer. ☐   an amended filing for the Filer. (2)   Check the following box if you are filing the Form F-X in paper in accordance

July 18, 2025 SUPPL

PROSPECTUS SUPPLEMENT TO THE SHORT FORM BASE SHELF PROSPECTUS DATED JULY 18, 2025 Secondary Offering July 18, 2025 ALGOMA STEEL GROUP INC. 26,650,426 Common Shares 160,254 Private Warrants

Table of Contents Filed pursuant to General Instruction II.L of Form F-10; File No. 333-288748 PROSPECTUS SUPPLEMENT TO THE SHORT FORM BASE SHELF PROSPECTUS DATED JULY 18, 2025 Secondary Offering July 18, 2025 ALGOMA STEEL GROUP INC. 26,650,426 Common Shares 160,254 Private Warrants This Prospectus Supplement, together with the accompanying Base Prospectus, relates to: (i) up to (a) 24,178,999 com

July 18, 2025 EX-99.3

Algoma Steel Group Inc. Announces Filing of Base Shelf Prospectus

Exhibit 99.3 MEDIA RELEASE July 18, 2025 Algoma Steel Group Inc. Announces Filing of Base Shelf Prospectus SAULT STE. MARIE, ONTARIO (July 18, 2025) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that it has filed a base shelf prospectus dated July 18, 2025 (the “Bas

July 18, 2025 EX-FILING FEES

Calculation of Filing Fee Table (Form Type) Algoma Steel Group Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security  Type Security  Class Title Fee Calculation Rule or Instruction Amount Registered

Exhibit 107 Calculation of Filing Fee Table F-10 (Form Type) Algoma Steel Group Inc.

July 18, 2025 F-10

As filed with the Securities and Exchange Commission on July 18, 2025

Table of Contents As filed with the Securities and Exchange Commission on July 18, 2025 Registration No.

July 18, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

July 16, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sau

July 16, 2025 EX-99.1

Algoma Steel Announces Conference Call and Provides Guidance for the Second Quarter 2025

Exhibit 99.1 MEDIA RELEASE July 15, 2025 Algoma Steel Announces Conference Call and Provides Guidance for the Second Quarter 2025 SAULT STE. MARIE, ONTARIO (July 15, 2025) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its 2025 second qu

July 10, 2025 EX-99.1

Algoma Steel Announces First Arc and First Steel Production from its New Electric Arc Furnace Unit One

Exhibit 99.1 MEDIA RELEASE July 10, 2025 Algoma Steel Announces First Arc and First Steel Production from its New Electric Arc Furnace Unit One SAULT STE. MARIE, Ontario, July 10, 2025 – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or the “Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that it has achieved its first stee

July 10, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

June 25, 2025 EX-99.1

Algoma Steel Group Inc. Announces Results of Voting at Annual Meeting of Shareholders

Exhibit 99.1 MEDIA RELEASE June 24, 2025 Algoma Steel Group Inc. Announces Results of Voting at Annual Meeting of Shareholders SAULT STE. MARIE, ONTARIO (June 24, 2025) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today the results of voting at its annual meeting of shar

June 25, 2025 EX-99.2

ALGOMA STEEL GROUP INC. (the “Company”) Annual General Meeting of Shareholders Held on June 24, 2025 REPORT OF VOTING RESULTS

Exhibit 99.2 ALGOMA STEEL GROUP INC. (the “Company”) Annual General Meeting of Shareholders Held on June 24, 2025 REPORT OF VOTING RESULTS Pursuant to section 11.3 of National Instrument 51-102 – Continuous Disclosure Obligations, this report describes the matters decided at the 2025 Annual General Meeting of Shareholders of the Company held virtually on June 24, 2025. All matters voted upon at th

June 25, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sau

June 5, 2025 EX-99.1

Algoma Steel Releases 2024 Sustainability Report

Exhibit 99.1 MEDIA RELEASE June 4, 2025 Algoma Steel Releases 2024 Sustainability Report SAULT STE. MARIE, ONTARIO (June 4, 2025) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced the release of its 2024 Sustainability Report (the “Report”), covering a nine-month transi

June 5, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sau

May 21, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2025 Commission File Number 001-40924 A

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

May 21, 2025 EX-99.1

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS AND MANAGEMENT INFORMATION CIRCULAR ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON JUNE 24, 2025 May 1, 2025

EX-99.1 Exhibit 99.1 NOTICE OF ANNUAL MEETING OF SHAREHOLDERS AND MANAGEMENT INFORMATION CIRCULAR ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON JUNE 24, 2025 May 1, 2025 TABLE OF CONTENTS Notice of Annual Meeting of Shareholders i Letter to Shareholders i Management Information Circular 1 Attending and Voting at the Meeting 2 General 2 Instructions for Logging-In and Voting at the Virtual Meeting 3

May 21, 2025 EX-99.2

ALGOMA STEEL GROUP INC. (the “Company”) Meeting Annual June 24, 2025 at 10:00 AM (Canada/Eastern Standard) https://virtual-meetings.tsxtrust.com/1768 Password: algoma2025 (case sensitive) (the “Meeting”) Voting Instructions—Guidelines and Conditions

EX-99.2 Exhibit 99.2 ALGOMA STEEL GROUP INC. (the “Company”) Meeting Annual June 24, 2025 at 10:00 AM (Canada/Eastern Standard) https://virtual-meetings.tsxtrust.com/1768 Password: algoma2025 (case sensitive) (the “Meeting”) Voting Instructions—Guidelines and Conditions The Company is providing you the enclosed proxy-related materials for their securityholder Meeting. Your name, address and inform

April 30, 2025 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc. and its

April 30, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

April 30, 2025 EX-99.1

Algoma Steel Group Reports Financial Results for the First Quarter 2025 Consolidated Revenue of $517.1 Million Shipments of 470K Tons, with an 11% Quarter over Quarter increase in Plate Product Shipments, at 91K Tons Net Loss of $24.5 Million and Adj

Exhibit 99.1 MEDIA RELEASE April 29, 2025 Algoma Steel Group Reports Financial Results for the First Quarter 2025 Consolidated Revenue of $517.1 Million Shipments of 470K Tons, with an 11% Quarter over Quarter increase in Plate Product Shipments, at 91K Tons Net Loss of $24.5 Million and Adjusted EBITDA Loss of $46.7 Million, Including a $50 Million Insurance Proceeds Receivable First Steel Produc

April 30, 2025 EX-99.3

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at March 31, 2025 and December 31, 2024 and for the three month periods ended March 31, 2025 and 2024

Exhibit 99.3 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at March 31, 2025 and December 31, 2024 and for the three month periods ended March 31, 2025 and 2024 Algoma Steel Group Inc. Condensed Interim Consolidated Statements of Net (Loss) Income (Unaudited) Three month period ended March 31, 2025 March 31, 2024 expressed in millions of Canadian dollar

April 23, 2025 EX-99.1

MEDIA RELEASE

EX-99.1 Exhibit 99.1 MEDIA RELEASE April 22, 2025 Algoma Steel to Announce 2025 First Quarter Results April 29, 2025 SAULT STE. MARIE, Ontario, April 22, 2025 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its 2025 first quarter financia

April 23, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number 001-40924

Form 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West

April 10, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

April 10, 2025 EX-99.1

TSX TRUST COMPANY

Exhibit 99.1 TSX TRUST COMPANY VIA ELECTRONIC TRANSMISSION April 10, 2025 TO ALL APPLICABLE EXCHANGES AND COMMISSIONS: RE: ALGOMA STEEL GROUP INC.   Confirmation of Notice of Record and Meeting Dates We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities. We advise the following with respect to the upcoming Annual Meeting of Security Ho

March 13, 2025 EX-99.6

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002

EXHIBIT 99.6 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002 Algoma Steel Group Inc. (the “Company”) is filing with the U.S. Securities and Exchange Commission on the date hereof, its annual report on Form 40-F for the fiscal period ended December 31, 2024 (the “Report”). I, Michael Garcia, Chief Executive Officer of the C

March 13, 2025 EX-99.8

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 99.8 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No. 333-264063 on Form S-8 and Registration Statement No. 333-272816 on Form F-10 and to the use of our reports dated March 12, 2025 relating to the financial statements of Algoma Steel Group Inc. (the “Company”) and the effectiveness of the Company’s interna

March 13, 2025 EX-99.3

Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at December 31, 2024 and March 31, 2024 and for the nine month period ended December 31, 2024 and the year ended March 31, 2024

Exhibit 99.3 Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at December 31, 2024 and March 31, 2024 and for the nine month period ended December 31, 2024 and the year ended March 31, 2024 Table of Contents MANAGEMENT’S ANNUAL REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING Management of the Algoma Steel Group Inc. (“the Company”), including our Chief Executive Officer and Chief F

March 13, 2025 EX-99.5

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 THE SARBANES-OXLEY ACT OF 2002

EXHIBIT 99.5 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Rajat Marwah, certify that: 1. I have reviewed this annual report on Form 40-F of Algoma Steel Group Inc. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements

March 13, 2025 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc. and its

March 13, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

March 13, 2025 40-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F ☐ Registration Statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual Report pursuant to Section 13(a) or 15(d) of the Securities Exchange

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F ☐ Registration Statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual Report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 For the nine month period ended December 31 , 2024 Commission File Number: 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as

March 13, 2025 EX-99.1

Algoma Steel Group Reports Financial Results for the Three and Nine Months Ended December 31, 2024 Calendar Fourth Quarter Results In-Line with Previously Announced Expectations Reaffirmed Outlook on Transformative Electric Arc Furnace (EAF) Project,

Exhibit 99.1 MEDIA RELEASE March 12, 2025 Algoma Steel Group Reports Financial Results for the Three and Nine Months Ended December 31, 2024 Calendar Fourth Quarter Results In-Line with Previously Announced Expectations Reaffirmed Outlook on Transformative Electric Arc Furnace (EAF) Project, Including First Arc in April SAULT STE. MARIE, ONTARIO (March 12, 2025) – Algoma Steel Group Inc. (NASDAQ:

March 13, 2025 EX-99.4

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 THE SARBANES-OXLEY ACT OF 2002

EXHIBIT 99.4 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Michael Garcia, certify that: 1. I have reviewed this annual report on Form 40-F of Algoma Steel Group Inc. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statemen

March 13, 2025 EX-99.7

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002

EXHIBIT 99.7 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002 Algoma Steel Group Inc. (the “Company”) is filing with the U.S. Securities and Exchange Commission on the date hereof, its annual report on Form 40-F for the fiscal period ended December 31, 2024 (the “Report”). I, Rajat Marwah, Chief Financial Officer of the Com

March 13, 2025 EX-99.1

ANNUAL INFORMATION FORM for the nine month period ended December 31, 2024 Dated: March 12, 2025

Exhibit 99.1 ANNUAL INFORMATION FORM for the nine month period ended December 31, 2024 Dated: March 12, 2025 TABLE OF CONTENTS INTRODUCTION 1 CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION 1 MARKET AND INDUSTRY DATA 3 CORPORATE STRUCTURE 3 DESCRIPTION OF THE BUSINESS 5 RISK FACTORS 21 DIVIDENDS 54 DESCRIPTION OF CAPITAL STRUCTURE 54 MARKET FOR SECURITIES 61 AGREEMENTS WITH SHAREHOLDERS 63 E

February 28, 2025 EX-99.1

Algoma Steel to Announce Results for the Three and Nine Months Ended December 31, 2024 on March 12, 2025

Exhibit 99.1 MEDIA RELEASE February 27, 2025 Algoma Steel to Announce Results for the Three and Nine Months Ended December 31, 2024 on March 12, 2025 SAULT STE. MARIE, Ontario, February 27, 2025 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will rel

February 28, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2025 Commission File Number 001-40

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West St

February 24, 2025 EX-99.1

Algoma Steel Group to Participate in the BMO 34th Global Metals, Mining & Critical Minerals Conference

EX-99.1 2 d830238dex991.htm EX-99.1 Exhibit 99.1 MEDIA RELEASE February 24, 2025 Algoma Steel Group to Participate in the BMO 34th Global Metals, Mining & Critical Minerals Conference SAULT STE. MARIE, ONTARIO (February 24, 2025) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today

February 24, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2025 Commission File Number 001-40

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West St

January 3, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2025 Commission File Number 001-409

6-K 1 d836225d6k.htm 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2025 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into

January 3, 2025 EX-99.1

Algoma Steel Provides Guidance for the Quarter Ended December 31, 2024

EX-99.1 Exhibit 99.1 MEDIA RELEASE January 2, 2025 Algoma Steel Provides Guidance for the Quarter Ended December 31, 2024 SAULT STE. MARIE, ONTARIO (January 2, 2025) - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today provided guidance for its quarter ended December 31, 2024. Unles

December 4, 2024 EX-99.1

Algoma Steel Group to Participate in the Inaugural B. Riley Securities Energy Convergence Conference

EX-99.1 Exhibit 99.1 MEDIA RELEASE December 3, 2024 Algoma Steel Group to Participate in the Inaugural B. Riley Securities Energy Convergence Conference SAULT STE. MARIE, ONTARIO (December 3, 2024) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that the Company will

December 4, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

November 7, 2024 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

EX-99.2 Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc.

November 7, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number 001-40

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West St

November 7, 2024 EX-99.3

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at September 30, 2024 and March 31, 2024 and for the three and six month periods ended September 30, 2024 and 2023

EX-99.3 Exhibit 99.3 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at September 30, 2024 and March 31, 2024 and for the three and six month periods ended September 30, 2024 and 2023 Algoma Steel Group Inc. Condensed Interim Consolidated Statements of Net (Loss) Income (Unaudited) Three months ended September 30, Six months ended September 30, 2024 2023

November 7, 2024 EX-99.1

Algoma Steel Group Reports Fiscal Second Quarter 2025 Financial Results Second Quarter Results In-Line with Previously Announced Expectations Transformative Electric Arc Furnace (EAF) Commissioning Activities Expected to Start on Schedule During the

Exhibit 99.1 MEDIA RELEASE November 6, 2024 Algoma Steel Group Reports Fiscal Second Quarter 2025 Financial Results Second Quarter Results In-Line with Previously Announced Expectations Transformative Electric Arc Furnace (EAF) Commissioning Activities Expected to Start on Schedule During the Fourth Quarter of Calendar 2024; Substantially all of Expected Project Budget Now Fully Contracted Change

November 5, 2024 SC 13G/A

ASTL / Algoma Steel Group Inc. / MMCAP International Inc. SPC - SC 13G/A Passive Investment

SC 13G/A 1 tm2427500d2sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Algoma Steel Group Inc. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 015658107 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this statement) Check the ap

October 30, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number 001-409

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

October 30, 2024 EX-99.1

Algoma Steel to Announce Fiscal 2025 Second Quarter Results November 6, 2024

Exhibit 99.1 MEDIA RELEASE October 29, 2024 Algoma Steel to Announce Fiscal 2025 Second Quarter Results November 6, 2024 SAULT STE. MARIE, Ontario, October 29, 2024—Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its fiscal 2025 second quar

October 25, 2024 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 2 ef20037740ex99-1.htm EXHIBIT 1 Exhibit 1 JOINT FILING AGREEMENT The undersigned hereby agree that the statement on Schedule 13D with respect to the Common Shares of Algoma Steel Group Inc., dated as of October 25, 2024, is, and any amendments thereto (including amendments on Schedule 13G) signed by each of the undersigned, is filed on behalf of each of them; and each of them is responsib

October 25, 2024 SC 13D

ASTL / Algoma Steel Group Inc. / Maple Rock Capital Partners Inc. - SC 13D Activist Investment

SC 13D 1 ef20037740sc13d.htm SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No.)* ALGOMA STEEL GROUP INC. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 015658107 (CUSIP Number) Stephen D. Lane Chief Financial Officer Maple Rock Capital Partners Inc. 21 St. Clair Avenue Ea

September 27, 2024 EX-99.1

Algoma Steel Provides Fiscal Second Quarter 2025 Guidance

Exhibit 99.1 Algoma Steel Provides Fiscal Second Quarter 2025 Guidance SAULT STE. MARIE, Ontario, September 26, 2024 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today provided guidance for its fiscal second quarter ending September 30, 2024. Unless otherwise specified, all amount

September 27, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

September 25, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number 001-4

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West S

September 25, 2024 EX-99.1

Algoma Steel Announces Results of Voting at Annual Meeting of Shareholders

EX-99.1 Exhibit 99.1 MEDIA RELEASE September 24, 2024 Algoma Steel Announces Results of Voting at Annual Meeting of Shareholders SAULT STE. MARIE, ONTARIO (September 24, 2024) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today the results of voting at its virtual annual

September 25, 2024 EX-99.2

ALGOMA STEEL GROUP INC. (the “Company”) Annual General Meeting of Shareholders Held on September 24, 2024 REPORT OF VOTING RESULTS

EX-99.2 Exhibit 99.2 ALGOMA STEEL GROUP INC. (the “Company”) Annual General Meeting of Shareholders Held on September 24, 2024 REPORT OF VOTING RESULTS Pursuant to section 11.3 of National Instrument 51-102 – Continuous Disclosure Obligations, this report describes the matters decided at the 2024 Annual General Meeting of Shareholders of the Company held virtually on September 24, 2024. All matter

September 4, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

September 4, 2024 EX-99.1

Algoma Steel Group to Participate in the Jefferies 2024 Industrials Conference

Exhibit 99.1 MEDIA RELEASE September 3, 2024 Algoma Steel Group to Participate in the Jefferies 2024 Industrials Conference SAULT STE. MARIE, ONTARIO (September 3, 2024) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that the Company will be participating in the Jeff

August 30, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-4092

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street S

August 30, 2024 EX-99.1

Algoma Steel Group Announces Renewal of Normal Course Issuer Bid

Exhibit 99.1 MEDIA RELEASE August 29, 2024 Algoma Steel Group Announces Renewal of Normal Course Issuer Bid SAULT STE. MARIE, Ontario, August 29, 2024 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Toronto Stock Exchange (the “TSX”) has appr

August 28, 2024 EX-99.1

Algoma Steel Applauds Approval of New 230kV Transmission Line in Sault Ste. Marie, Supporting Regional Growth and Green Steel Transition

Exhibit 99.1 MEDIA RELEASE August 28, 2024 Algoma Steel Applauds Approval of New 230kV Transmission Line in Sault Ste. Marie, Supporting Regional Growth and Green Steel Transition SAULT STE. MARIE, ONTARIO (August 28, 2024) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today congra

August 28, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-4092

6-K 1 d877328d6k.htm 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into E

August 22, 2024 EX-99.1

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS AND MANAGEMENT INFORMATION CIRCULAR ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON SEPTEMBER 24, 2024 August 1, 2024

Exhibit 99.1 NOTICE OF ANNUAL MEETING OF SHAREHOLDERS AND MANAGEMENT INFORMATION CIRCULAR ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON SEPTEMBER 24, 2024 August 1, 2024 TABLE OF CONTENTS Notice of Annual Meeting of Shareholders i Letter to Shareholders iii Management Information Circular 1 Attending and Voting at the Meeting 1 General 1 Instructions for Logging-In and Voting at the Virtual Meeting

August 22, 2024 EX-99.2

ALGOMA STEEL INC. ALGOMA STEEL GROUP INC. (the “Company”) Annual Meeting Sept. 24, 2024 at 10:00 AM (Canada/Eastern Standard) https://virtual-meetings.tsxtrust.com/1699 Meeting ID: 1699 Password: algoma2024 (the “Meeting”) Proxy Voting – Guidelines a

Exhibit 99.2 ALGOMA STEEL INC. ALGOMA STEEL GROUP INC. (the “Company”) Annual Meeting Sept. 24, 2024 at 10:00 AM (Canada/Eastern Standard) https://virtual-meetings.tsxtrust.com/1699 Meeting ID: 1699 Password: algoma2024 (the “Meeting”) Proxy Voting – Guidelines and Conditions 1. THIS PROXY IS. SOLICITED BY OR ON BEHALF OF THE MANAGEMENT OF THE COMPANY 2. THIS PROXY SHOULD BE READ. IN CONJUNCTION W

August 22, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-4092

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street S

August 14, 2024 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

EX-99.2 Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc.

August 14, 2024 EX-99.3

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at June 30, 2024 and March 31, 2024 and for the three month periods ended June 30, 2024 and 2023

EX-99.3 Exhibit 99.3 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at June 30, 2024 and March 31, 2024 and for the three month periods ended June 30, 2024 and 2023 Algoma Steel Group Inc. Condensed Interim Consolidated Statements of Net Income (Unaudited) Three month period ended June 30, 2024 June 30, 2023 expressed in millions of Canadian dollars, exc

August 14, 2024 EX-99.1

Algoma Steel Group Reports Fiscal First Quarter 2025 Financial Results First Quarter Results In-Line with Previously Announced Outlook Completed Plate Mill Upgrade, Ramping Production Towards Expected Annual Run Rate Capacity of Over 650,000 NT Conti

EX-99.1 Exhibit 99.1 MEDIA RELEASE August 13, 2024 Algoma Steel Group Reports Fiscal First Quarter 2025 Financial Results First Quarter Results In-Line with Previously Announced Outlook Completed Plate Mill Upgrade, Ramping Production Towards Expected Annual Run Rate Capacity of Over 650,000 NT Continued to Significantly De-risk Transformative Electric Arc Furnace Project as Construction Continues

August 14, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-4092

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stre

August 13, 2024 EX-99.1

Algoma Steel Issues 2024 ESG Annual Report

EX-99.1 Exhibit 99.1 MEDIA RELEASE August 12, 2024 Algoma Steel Issues 2024 ESG Annual Report SAULT STE. MARIE, Ontario, August 12, 2024 – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced the publication of its second annual Environmental, Social, and Governance (“ESG”)

August 13, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-4092

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street S

August 7, 2024 EX-99.1

Algoma Steel to Announce Fiscal 2025 First Quarter Results August 13, 2024

Exhibit 99.1 MEDIA RELEASE August 6, 2024 Algoma Steel to Announce Fiscal 2025 First Quarter Results August 13, 2024 SAULT STE. MARIE, Ontario, August 6, 2024 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its fiscal 2025 first quarter f

August 7, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-4092

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street S

July 31, 2024 EX-99.1

JOINT FILING AGREEMENT July 31, 2024

EX-99.1 Exhibit 1 JOINT FILING AGREEMENT July 31, 2024 In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D filed on the date hereof (including amendments thereto) with respect to the Common Shares, without par value, of Algoma Steel Group, Inc. This

July 31, 2024 SC 13D

ASTL / Algoma Steel Group Inc. / Zekelman Industries, Inc. - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Algoma Steel Group Inc. (Name of Issuer) Common Shares, without par value (Title of Class of Securities) 015658107 (CUSIP Number) Michael P. McNamara Executive Vice President Zekelman Industries, Inc. 227 West Monroe Street, Suite 2600 Chicago, Ill

July 12, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2024 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sau

July 12, 2024 EX-99.1

TSX TRUST COMPANY

Exhibit 99.1 TSX TRUST COMPANY VIA ELECTRONIC TRANSMISSION July 12, 2024 TO ALL APPLICABLE EXCHANGES AND COMMISSIONS: RE:    ALGOMA STEEL GROUP INC.  Confirmation of Notice of Record and Meeting Dates We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities. We advise the following with respect to the upcoming Annual Meeting of Security H

June 24, 2024 EX-99.1

Algoma Steel Group to Participate at the Stifel Canada’s 3rd Annual Summer Solstice Conference

Exhibit 99.1 MEDIA RELEASE June 24, 2024 Algoma Steel Group to Participate at the Stifel Canada’s 3rd Annual Summer Solstice Conference SAULT STE. MARIE, ONTARIO (June 24, 2024 – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that the Company will participate at the St

June 24, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sau

June 21, 2024 EX-97

Algoma Steel Group Inc. CLAWBACK POLICY

EXHIBIT 97 Algoma Steel Group Inc. CLAWBACK POLICY The Board of Directors (“Board”) of Algoma Steel Group Inc. (the “Company”) has adopted this Policy in accordance with Nasdaq listing requirements. A. Application of Policy This Policy applies in the event of any restatement (“Restatement”) of the Company’s financial results due to its material non-compliance with financial reporting requirements

June 21, 2024 EX-99.6

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002

EXHIBIT 99.6 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002 Algoma Steel Group Inc. (the “Company”) is filing with the U.S. Securities and Exchange Commission on the date hereof, its annual report on Form 40-F for the fiscal year ended March 31, 2024 (the “Report”). I, Michael Garcia, Chief Executive Officer of the Compan

June 21, 2024 EX-99.7

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002

EXHIBIT 99.7 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002 Algoma Steel Group Inc. (the “Company”) is filing with the U.S. Securities and Exchange Commission on the date hereof, its annual report on Form 40-F for the fiscal year ended March 31, 2024 (the “Report”). I, Rajat Marwah, Chief Financial Officer of the Company,

June 21, 2024 EX-99.3

Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at March 31, 2024 and 2023 and for the years ended March 31, 2024 and 2023

Exhibit 99.3 Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at March 31, 2024 and 2023 and for the years ended March 31, 2024 and 2023 MANAGEMENT’S ANNUAL REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING Management of the Algoma Steel Group Inc. (“the Company”), including our Chief Executive Officer and Chief Financial Officer, is responsible for establishing and maintaining adequ

June 21, 2024 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc. and its

June 21, 2024 EX-99.8

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 99.8 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No. 333-264063 on Form S-8 and Registration Statement No. 333-272816 on Form F-10 and to the use of our reports dated June 20, 2024 relating to the financial statements of Algoma Steel Group Inc. (the “Company”) and the effectiveness of the Company’s internal

June 21, 2024 EX-99.5

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 THE SARBANES-OXLEY ACT OF 2002

EXHIBIT 99.5 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Rajat Marwah, certify that: 1. I have reviewed this annual report on Form 40-F of Algoma Steel Group Inc. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements

June 21, 2024 EX-99.1

Algoma Steel Group Reports Fiscal Fourth Quarter and Full Year 2024 Financial Results Fourth Quarter Results In-Line with Previously Announced Expectations Plate and Strip Operations Running at Planned Production Levels Reaffirmed Outlook on Transfor

EX-99.1 Exhibit 99.1 MEDIA RELEASE June 20, 2024 Algoma Steel Group Reports Fiscal Fourth Quarter and Full Year 2024 Financial Results Fourth Quarter Results In-Line with Previously Announced Expectations Plate and Strip Operations Running at Planned Production Levels Reaffirmed Outlook on Transformative Electric Arc Furnace (EAF) Project Provides Outlook for Q1 Fiscal 2025 Further Strengthened Li

June 21, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

June 21, 2024 EX-99.4

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 THE SARBANES-OXLEY ACT OF 2002

EXHIBIT 99.4 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Michael Garcia, certify that: 1. I have reviewed this annual report on Form 40-F of Algoma Steel Group Inc. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statemen

June 21, 2024 40-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 2054 9 FORM 40-F ☐ Registration Statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual Report pursuant to Section 13(a) or 15(d) of the Securities Exchange

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 2054 9 FORM 40-F ☐ Registration Statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual Report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended March 31, 2024 Commission File Number: 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified

June 21, 2024 EX-99.1

ANNUAL INFORMATION FORM for the year ended March 31, 2024 Dated: June 20, 2024

Exhibit 99.1 ANNUAL INFORMATION FORM for the year ended March 31, 2024 Dated: June 20, 2024 TABLE OF CONTENTS INTRODUCTION 1 CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION 1 MARKET AND INDUSTRY DATA 3 CORPORATE STRUCTURE 3 DESCRIPTION OF THE BUSINESS 5 RISK FACTORS 21 DIVIDENDS 52 DESCRIPTION OF CAPITAL STRUCTURE 53 MARKET FOR SECURITIES 60 AGREEMENTS WITH SHAREHOLDERS 62 ESCROWED SECURITIE

June 11, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sau

June 11, 2024 EX-99.1

Algoma Steel Appoints Erin Oliver as Vice President—Health and Safety

Exhibit 99.1 MEDIA RELEASE June 11, 2024 Algoma Steel Appoints Erin Oliver as Vice President—Health and Safety SAULT STE. MARIE, Ontario, June 11, 2024 – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that it has appointed Erin Oliver in a newly created role of Vice President—Health an

June 7, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

June 7, 2024 EX-99.1

Algoma Steel to Announce Fiscal 2024 Fourth Quarter and Full Year Results June 20, 2024

EX-99.1 Exhibit 99.1 MEDIA RELEASE June 6, 2024 Algoma Steel to Announce Fiscal 2024 Fourth Quarter and Full Year Results June 20, 2024 SAULT STE. MARIE, Ontario, June 6, 2024 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its fiscal 202

April 10, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2024 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

April 10, 2024 EX-99.1

FORM 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.1 FORM 51-102F3 MATERIAL CHANGE REPORT Item One – Name and Address of Company Algoma Steel Group Inc. (the “Company”) 105 West St., Sault Ste Marie, Ontario, P6A 7B4, Canada Item Two - Date of Material Change April 5, 2024 Item Three - News Release The news releases reporting the material change described in this report were disseminated on March 25, 2024 (“News Release A”), and March 2

March 27, 2024 EX-99.1

Algoma Steel Inc. Announces Pricing of US$350 Million 9.125% Senior Secured Second Lien Notes due 2029

EX-99.1 Exhibit 99.1 MEDIA RELEASE March 26, 2024 Algoma Steel Inc. Announces Pricing of US$350 Million 9.125% Senior Secured Second Lien Notes due 2029 SAULT STE. MARIE, ONTARIO (March 26, 2024) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma”), a fully integrated producer of hot and cold rolled steel products including sheet and plate, announced today that its indirect wholly-owned

March 27, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2024 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

March 26, 2024 EX-99.1

CORRECTION: Dividend Payment Date Adjustment Due to Canadian Statutory Holiday

Exhibit 99.1 MEDIA RELEASE March 25, 2024 CORRECTION: Dividend Payment Date Adjustment Due to Canadian Statutory Holiday SAULT STE. MARIE, Ontario, March 25, 2024 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today informs its shareholders of an adjustment to the previously announc

March 26, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2024 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

March 25, 2024 EX-99.1

Algoma Steel Provides Fiscal Fourth Quarter 2024

Exhibit 99.1 MEDIA RELEASE March 25, 2024 Algoma Steel Provides Fiscal Fourth Quarter 2024 Guidance SAULT STE. MARIE, Ontario, March 25, 2024 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today provided guidance for its fiscal fourth quarter ending March 31, 2024. Unless otherwise

March 25, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2024 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

March 25, 2024 EX-99.2

Algoma Steel Inc. Announces Proposed Offering of US$350 Million of Senior Secured Second Lien Notes due 2029

Exhibit 99.2 MEDIA RELEASE March 25, 2024 Algoma Steel Inc. Announces Proposed Offering of US$350 Million of Senior Secured Second Lien Notes due 2029 SAULT STE. MARIE, ONTARIO (March 25, 2024) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma”), a fully integrated producer of hot and cold rolled steel products including sheet and plate, announced today that its indirect wholly-owned su

February 26, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

February 26, 2024 EX-99.1

Algoma Steel Group to Participate in the BMO 33rd Global Metals, Mining & Critical Minerals Conference

Exhibit 99.1 MEDIA RELEASE February 26, 2024 Algoma Steel Group to Participate in the BMO 33rd Global Metals, Mining & Critical Minerals Conference SAULT STE. MARIE, ONTARIO (February 26, 2024) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that the Company is partic

February 20, 2024 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 2 tm246719d1ex1.htm EXHIBIT 1 Exhibit 1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Common Shares, no par value, of Algoma Steel Group Inc., and further agree that thi

February 20, 2024 SC 13G

ASTL / Algoma Steel Group Inc. / MMCAP International Inc. SPC - SC 13G Passive Investment

SC 13G 1 tm246719d1sc13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Algoma Steel Group Inc. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 015658107 (CUSIP Number) February 7, 2024 (Date of Event Which Requires Filing of this statement) Check the appropriate

February 15, 2024 EX-99.1

Algoma Resumes Normal Steel Production

Exhibit 99.1 MEDIA RELEASE February 14, 2024 Algoma Resumes Normal Steel Production SAULT STE. MARIE, Ontario, Feb. 14, 2024 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today advised the repair and restart of its blast furnace is complete and steel production res

February 15, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

February 14, 2024 SC 13G/A

ALGOMA STEEL GROUP INC / Maple Rock Capital Partners Inc. Passive Investment

SC 13G/A 1 maplerock-astl123123a1.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* ALGOMA STEEL GROUP INC. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 015658107 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropr

February 13, 2024 SC 13G/A

ALGOMA STEEL GROUP INC / CONTRARIAN CAPITAL MANAGEMENT, L.L.C. - ALGOMA STEEL GROUP INC. Passive Investment

SC 13G/A 1 p24-0639sc13ga.htm ALGOMA STEEL GROUP INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* Algoma Steel Group Inc. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 015658107 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of This Statement) Check the app

February 12, 2024 SC 13G/A

ALGOMA STEEL GROUP INC / Polus Capital Management Ltd - ALGOMA STEEL GROUP INC. Passive Investment

SC 13G/A 1 p24-0485sc13ga.htm ALGOMA STEEL GROUP INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Algoma Steel Group Inc. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 015658107 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the app

February 9, 2024 EX-99.1

Algoma Addresses Casthouse Incident Employees Discharged From Hospital and Timing of Blast Furnace Restart Remains On Track

Exhibit 99.1 MEDIA RELEASE February 9, 2024 Algoma Addresses Casthouse Incident Employees Discharged From Hospital and Timing of Blast Furnace Restart Remains On Track SAULT STE. MARIE, Ontario, February 9, 2024 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today a

February 9, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

February 7, 2024 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc. and its

February 7, 2024 EX-99.3

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at December 31, 2023 and March 31, 2023 and for the three and nine month periods ended December 31, 2023 and 2022

Exhibit 99.3 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at December 31, 2023 and March 31, 2023 and for the three and nine month periods ended December 31, 2023 and 2022 Algoma Steel Group Inc. Condensed Interim Consolidated Statements of Net (Loss) Income (Unaudited) Three months ended December 31, Nine months ended December 31, 2023 2022 2023 2022

February 7, 2024 EX-99.1

Algoma Steel Group Reports Fiscal Third Quarter 2024 Financial Steel Shipments and Adjusted EBITDA In-line with Previously Announced Expectations Delivered Year-over-year Improvement Across Nearly All Metrics Provides Further Update on Coke-Making Ut

Exhibit 99.1 MEDIA RELEASE February 6, 2024 Algoma Steel Group Reports Fiscal Third Quarter 2024 Financial Results Steel Shipments and Adjusted EBITDA In-line with Previously Announced Expectations Delivered Year-over-year Improvement Across Nearly All Metrics Provides Further Update on Coke-Making Utilities Structure Collapse Reiterated Outlook on Transformative EAF Project with $509.9 Million In

February 7, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

January 30, 2024 EX-99.1

Algoma Steel to Announce Fiscal 2024 Third Quarter Results February 6, 2024

Exhibit 99.1 Algoma Steel to Announce Fiscal 2024 Third Quarter Results February 6, 2024 January 29, 2024 SAULT STE. MARIE, Ontario, Jan. 29, 2024 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its fiscal 2024 third quar

January 30, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2024 Commission File Number 001-409

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

January 23, 2024 EX-99.1

Algoma Steel Provides Update on Incident at Coke-Making Plant

Exhibit 99.1 MEDIA RELEASE January 23, 2024 Algoma Steel Provides Update on Incident at Coke-Making Plant SAULT STE. MARIE, Ontario, Jan. 23, 2024 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today provided an update further to the incident on Saturday, January 20

January 23, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2024 Commission File Number 001-409

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

January 22, 2024 EX-99.1

Algoma Steel Reports Incident at Coke-Making Plant

Exhibit 99.1 MEDIA RELEASE January 20, 2024 Algoma Steel Reports Incident at Coke-Making Plant SAULT STE. MARIE, Ontario, January 20, 2024 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that in the early hours of Saturday, January 20, 2024 there was a collapse of a s

January 22, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2024 Commission File Number 001-409

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

January 4, 2024 EX-99.1

Algoma Steel Provides Fiscal Third Quarter 2024 Guidance

Exhibit 99.1 Algoma Steel Provides Fiscal Third Quarter 2024 Guidance SAULT STE. MARIE, Ontario, January 3, 2024 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today provided guidance for its fiscal third quarter ending December 31, 2023. Unless otherwise specified, all amounts are

January 4, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2024 Commission File Number 001-409

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2024 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

December 22, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2023 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

December 22, 2023 EX-99.1

Algoma Steel Group Announces Director Retirement

Exhibit 99.1 MEDIA RELEASE December 21, 2023 Algoma Steel Group Announces Director Retirement SAULT STE. MARIE, Ontario, December 21, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that Andrew Schultz is retiring from the board of directors effe

November 24, 2023 EX-99.1

Algoma Steel Announces Retirement of Vice President of Sales

Exhibit 99.1 MEDIA RELEASE November 23, 2023 Algoma Steel Announces Retirement of Vice President of Sales SAULT STE. MARIE, ONTARIO (November 23, 2023) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced its Vice President of Sales, Rory Brandow, has indicated his pending

November 24, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

November 3, 2023 EX-99.3

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at September 30, 2023 and March 31, 2023 and for the three and six month periods ended September 30, 2023 and 2022

Exhibit 99.3 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at September 30, 2023 and March 31, 2023 and for the three and six month periods ended September 30, 2023 and 2022 Algoma Steel Group Inc. Condensed Interim Consolidated Statements of Net Income (Unaudited) Three months ended September 30, Six months ended September 30, 2023 2022 2023 2022 expre

November 3, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

November 3, 2023 EX-99.1

Algoma Steel Group Reports Fiscal Second Quarter 2024 Financial Results Second Quarter In line with Previously Announced Expectations Positive Momentum on EAF Power Supply Reiterated Outlook on Transformative EAF Project with $455.7 Million Invested

Exhibit 99.1 MEDIA RELEASE November 2, 2023 Algoma Steel Group Reports Fiscal Second Quarter 2024 Financial Results Second Quarter In line with Previously Announced Expectations Positive Momentum on EAF Power Supply Reiterated Outlook on Transformative EAF Project with $455.7 Million Invested to Date SAULT STE. MARIE, ONTARIO (November 2, 2023) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (

November 3, 2023 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc. and its

October 24, 2023 EX-99.1

Algoma Steel to Announce Fiscal 2024 Second Quarter Results November 2, 2023

Exhibit 99.1 MEDIA RELEASE October 23, 2023 Algoma Steel to Announce Fiscal 2024 Second Quarter Results November 2, 2023 SAULT STE. MARIE, Ontario, October 23, 2023 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its fiscal 2024 second qu

October 24, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2023 Commission File Number 001-409

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

October 3, 2023 EX-99.1

Algoma Steel Announces Extension of Iron Ore Contract with U. S. Steel to Support Transition to Electric Arc Steelmaking

EX-99.1 Exhibit 99.1 Algoma Steel Announces Extension of Iron Ore Contract with U. S. Steel to Support Transition to Electric Arc Steelmaking SAULT STE. MARIE, Ontario, October 2, 2023 — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced a two-year extension of its existin

October 3, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2023 Commission File Number 001-409

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Str

September 29, 2023 EX-99.1

Algoma Steel Provides Fiscal Second Quarter 2024 Guidance

Exhibit 99.1 Algoma Steel Provides Fiscal Second Quarter 2024 Guidance SAULT STE. MARIE, Ontario, September 28, 2023 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today provided guidance for its fiscal second quarter ending September 30, 2023. Unless otherwise specified, all amount

September 29, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

September 27, 2023 EX-99.2

ALGOMA STEEL GROUP INC. (the “Company”) Annual General Meeting of Shareholders Held on September 26, 2023 REPORT OF VOTING RESULTS

Exhibit 99.2 ALGOMA STEEL GROUP INC. (the “Company”) Annual General Meeting of Shareholders Held on September 26, 2023 REPORT OF VOTING RESULTS Pursuant to section 11.3 of National Instrument 51-102 – Continuous Disclosure Obligations, this report describes the matters decided at the 2023 Annual General Meeting of Shareholders of the Company held virtually on September 26, 2023. All matters voted

September 27, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

September 27, 2023 EX-99.1

Algoma Steel Announces Results of Voting at Annual Meeting of Shareholders

Exhibit 99.1 MEDIA RELEASE September 26, 2023 Algoma Steel Announces Results of Voting at Annual Meeting of Shareholders SAULT STE. MARIE, ONTARIO (September 26, 2023) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today the results of voting at its virtual annual meeting

September 19, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

September 19, 2023 EX-99.1

Algoma Steel donates C$120,000 to support United Way’s Harvest Algoma

Exhibit 99.1 Algoma Steel donates C$120,000 to support United Way’s Harvest Algoma September 19, 2023 SAULT STE. MARIE, Ontario, Sept. 19, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that as part of its longstanding support of the United Way,

September 13, 2023 EX-99.1

Algoma Steel Issues Inaugural Annual ESG Report

Exhibit 99.1 News release September 12, 2023 Algoma Steel Issues Inaugural Annual ESG Report SAULT STE. MARIE, ONTARIO – September 12, 2023 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or the “Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today issued its first annual environmental, social and governance (“ESG”) report (the “Report”)

September 13, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

September 1, 2023 EX-99.1

Algoma Steel Group to Participate in the Jefferies 2023 Industrials Conference

Exhibit 99.1 Algoma Steel Group to Participate in the Jefferies 2023 Industrials Conference August 30, 2023 SAULT STE. MARIE, Ontario, Aug. 30, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that the Company will be participating in the Jefferie

September 1, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-4092

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stre

August 23, 2023 EX-99.1

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS AND MANAGEMENT INFORMATION CIRCULAR ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON SEPTEMBER 26, 2023 August 1, 2023

Exhibit 99.1 NOTICE OF ANNUAL MEETING OF SHAREHOLDERS AND MANAGEMENT INFORMATION CIRCULAR ANNUAL MEETING OF SHAREHOLDERS TO BE HELD ON SEPTEMBER 26, 2023 August 1, 2023 TABLE OF CONTENTS Notice of Annual Meeting of Shareholders iii Letter to Shareholders v Management Information Circular 6 Attending and Voting at the Meeting 6 General 6 Instructions for Logging-In and Voting at the Virtual Meeting

August 23, 2023 EX-99.2

ALGOMA STEEL INC. Algoma Steel Group Inc. (the “Company”) FORM OF PROXY (“PROXY”) Annual Meeting September 26, 2023 at 10:00 a.m. (Toronto time) URL: https://virtual-meetings.tsxtrust.com/1511 password: algoma2023 (the “Meeting”) RECORD DATE: Aug. 8,

Exhibit 99.2 ALGOMA STEEL INC. Algoma Steel Group Inc. (the “Company”) FORM OF PROXY (“PROXY”) Annual Meeting September 26, 2023 at 10:00 a.m. (Toronto time) URL: https://virtual-meetings.tsxtrust.com/1511 password: algoma2023 (the “Meeting”) RECORD DATE: Aug. 8, 2023 CONTROL NUMBER: SEQUENCE #: FILING DEADLINE FOR PROXY: September 22, 2023 at 10:00 a.m. (Toronto time) VOTING METHOD INTERNET Go to

August 23, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-4092

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street S

August 11, 2023 EX-99.1

Algoma Steel Group Reports Fiscal 2024 First Quarter Financial Results First Quarter Results Ahead of Previously Announced Expectations Solid Performance from Operations Resulted in Strong Cash Flow Generation Reiterated Outlook on Transformative EAF

Exhibit 99.1 MEDIA RELEASE August 10, 2023 Algoma Steel Group Reports Fiscal 2024 First Quarter Financial Results First Quarter Results Ahead of Previously Announced Expectations Solid Performance from Operations Resulted in Strong Cash Flow Generation Reiterated Outlook on Transformative EAF Project with $74 Million Invested in Quarter SAULT STE. MARIE, ONTARIO (August 10, 2023) – Algoma Steel Gr

August 11, 2023 EX-99.3

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at June 30, 2023 and March 31, 2023 and for the three month periods ended June 30, 2023 and 2022

Exhibit 99.3 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at June 30, 2023 and March 31, 2023 and for the three month periods ended June 30, 2023 and 2022 ALGOMA STEEL GROUP INC. Condensed Interim Consolidated Statements of Net Income (Unaudited) Three month period ended June 30, 2023 June 30, 2022 expressed in millions of Canadian dollars Revenue (Not

August 11, 2023 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management’s Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc. and its

August 11, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-4092

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street S

July 31, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2023 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

July 31, 2023 EX-99.1

Algoma Steel to Announce Fiscal 2024 First Quarter Results August 10, 2023

EX-99.1 Exhibit 99.1 Algoma Steel to Announce Fiscal 2024 First Quarter Results August 10, 2023 July 27, 2023 SAULT STE. MARIE, Ontario, July 27, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its fiscal 2024 first

July 17, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2023 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

July 17, 2023 EX-99.1

TSX TRUST COMPANY

EX-99.1 Exhibit 99.1 TSX TRUST COMPANY VIA ELECTRONIC TRANSMISSION July 14, 2023 TO ALL APPLICABLE EXCHANGES AND COMMISSIONS: RE: ALGOMA STEEL GROUP INC. Confirmation of Notice of Record and Meeting Dates We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities. We advise the following with respect to the upcoming Annual Meeting of Securi

June 23, 2023 POS AM

As filed with the Securities and Exchange Commission on June 22, 2023.

POS AM As filed with the Securities and Exchange Commission on June 22, 2023. Registration No. 333-260534 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 5 to FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ALGOMA STEEL GROUP INC. (Exact Name of Registrant as Specified in Its Charter) British Columbia 3312 Not Applicable (State

June 23, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

June 23, 2023 SUPPL

PROSPECTUS SUPPLEMENT TO THE SHORT FORM BASE SHELF PROSPECTUS DATED JUNE 21, 2023 Secondary Offering June 22, 2023 ALGOMA STEEL GROUP INC. 28,276,555 Common Shares 262,254 Private Warrants

SUPPL Table of Contents Filed pursuant to General Instruction II.L of Form F-10; File No. 333-272816 PROSPECTUS SUPPLEMENT TO THE SHORT FORM BASE SHELF PROSPECTUS DATED JUNE 21, 2023 Secondary Offering June 22, 2023 ALGOMA STEEL GROUP INC. 28,276,555 Common Shares 262,254 Private Warrants This Prospectus Supplement, together with the accompanying Base Prospectus, relates to: (i) up to (a) 24,179,0

June 22, 2023 EX-99.1

Algoma Steel Group Reports Fiscal Fourth Quarter and Full Year 2023 Financial Results Fourth Quarter Results In-Line with Previously Announced Expectations Plate and Strip Operations Running at Normal Production Levels Planned Plate Capacity Increase

EX-99.1 Exhibit 99.1 MEDIA RELEASE June 21, 2023 Algoma Steel Group Reports Fiscal Fourth Quarter and Full Year 2023 Financial Results Fourth Quarter Results In-Line with Previously Announced Expectations Plate and Strip Operations Running at Normal Production Levels Planned Plate Capacity Increase Ahead of Schedule Further Strengthened Liquidity with Recently Upsized ABL Credit Facility Updated O

June 22, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

Table of Contents PROSPECTUS SUPPLEMENT NO. 25 Filed Pursuant to Rule 424(b)(3) (to prospectus dated June 30, 2022) Registration No. 333-260534 ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from

June 22, 2023 EX-4.3

Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at March 31, 2023 and 2022 and for the years ended March 31, 2023 and 2022

EX-4.3 Exhibit 4.3 Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at March 31, 2023 and 2022 and for the years ended March 31, 2023 and 2022 MANAGEMENT’S ANNUAL REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING Management of the Algoma Steel Group Inc. (“the Company”), including our Chief Executive Officer and Chief Financial Officer, is responsible for establishing and maintaining

June 22, 2023 40-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F ☐ Registration Statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual Report pursuant to Section 13(a) or 15(d) of the Securities Exchange

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F ☐ Registration Statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual Report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended March 31, 2023 Commission File Number: 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified

June 22, 2023 EX-7.1

ALGOMA STEEL GROUP INC. as Issuer [ ] as Trustee Dated as of [ ]

Table of Contents Exhibit 7.1 ALGOMA STEEL GROUP INC. as Issuer AND [ ] as Trustee Indenture Dated as of [ ] Table of Contents ALGOMA STEEL GROUP INC. Reconciliation and tie between Trust Indenture Act of 1939 and Indenture, dated as of [ ] Trust Indenture Act Section Indenture Section § 310(a)(1) 607 (a)(2) 607 (b) 608 § 312(c) 701 § 314(a) 703 (a)(4) 904 (c)(1) 102 (c)(2) 102 (e) 102 § 315(b) 60

June 22, 2023 EX-99.6

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002

EX-99.6 EXHIBIT 99.6 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002 Algoma Steel Group Inc. (the “Company”) is filing with the U.S. Securities and Exchange Commission on the date hereof, its annual report on Form 40-F for the fiscal year ended March 31, 2023 (the “Report”). I, Michael Garcia, Chief Executive Officer of th

June 22, 2023 EX-99.4

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

EX-99.4 EXHIBIT 99.4 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Michael Garcia, certify that: 1. I have reviewed this annual report on Form 40-F of Algoma Steel Group Inc. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the

June 22, 2023 EX-99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

EX-99.2 Exhibit 99.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc. an

June 22, 2023 F-X

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM F-X APPOINTMENT OF AGENT FOR SERVICE OF PROCESS AND UNDERTAKING

FORM F-X UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM F-X APPOINTMENT OF AGENT FOR SERVICE OF PROCESS AND UNDERTAKING A. Name of issuer or person filing (“Filer”): ALGOMA STEEL GROUP INC. B. (1) This is [check one]: ☒ an original filing for the Filer. ☐ an amended filing for the Filer. (2) Check the following box if you are filing the Form F-X in paper in accordance

June 22, 2023 F-10

As filed with the Securities and Exchange Commission on June 21, 2023

Table of Contents As filed with the Securities and Exchange Commission on June 21, 2023 Registration No.

June 22, 2023 EX-99.1

ANNUAL INFORMATION FORM for the year ended March 31, 2023 Dated: June 21, 2023

Exhibit 99.1 ANNUAL INFORMATION FORM for the year ended March 31, 2023 Dated: June 21, 2023 TABLE OF CONTENTS INTRODUCTION 1 CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION 1 MARKET AND INDUSTRY DATA 3 CORPORATE STRUCTURE 3 DESCRIPTION OF THE BUSINESS 5 RISK FACTORS 20 DIVIDENDS 52 DESCRIPTION OF CAPITAL STRUCTURE 52 MARKET FOR SECURITIES 59 AGREEMENTS WITH SHAREHOLDERS 61 ESCROWED SECURITIE

June 22, 2023 EX-4.2

MANAGEMENT’S DISCUSSION AND ANALYSIS

Exhibit 4.2 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer to Algoma Steel Group Inc. and its con

June 22, 2023 POS EX

As filed with the Securities and Exchange Commission on June 21, 2023.

POS EX As filed with the Securities and Exchange Commission on June 21, 2023. Registration No. 333-260534 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 4 to FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ALGOMA STEEL GROUP INC. (Exact Name of Registrant as Specified in Its Charter) British Columbia 3312 Not Applicable (State

June 22, 2023 EX-99.3

Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at March 31, 2023 and 2022 and for the years ended March 31, 2023 and 2022

Exhibit 99.3 Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at March 31, 2023 and 2022 and for the years ended March 31, 2023 and 2022 MANAGEMENT’S ANNUAL REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING Management of the Algoma Steel Group Inc. (“the Company”), including our Chief Executive Officer and Chief Financial Officer, is responsible for establishing and maintaining adequ

June 22, 2023 EX-99.2

Algoma Steel Announces Filing of Base Shelf Prospectus

Exhibit 99.2 MEDIA RELEASE June 21, 2023 Algoma Steel Announces Filing of Base Shelf Prospectus SAULT STE. MARIE, ONTARIO – (June 21, 2023) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that it has filed a base shelf prospectus dated June 21, 2023 (the “Base Shelf P

June 22, 2023 EX-4.1

ANNUAL INFORMATION FORM for the year ended March 31, 2023 Dated: June 21, 2023

EX-4.1 Exhibit 4.1 ANNUAL INFORMATION FORM for the year ended March 31, 2023 Dated: June 21, 2023 TABLE OF CONTENTS INTRODUCTION 1 CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION 1 MARKET AND INDUSTRY DATA 3 CORPORATE STRUCTURE 3 DESCRIPTION OF THE BUSINESS 5 RISK FACTORS 20 DIVIDENDS 52 DESCRIPTION OF CAPITAL STRUCTURE 52 MARKET FOR SECURITIES 59 AGREEMENTS WITH SHAREHOLDERS 61 ESCROWED SEC

June 22, 2023 EX-99.7

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002

EX-99.7 EXHIBIT 99.7 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ENACTED PURSUANT TO SECTION 906 OF THE U.S. SARBANES-OXLEY ACT OF 2002 Algoma Steel Group Inc. (the “Company”) is filing with the U.S. Securities and Exchange Commission on the date hereof, its annual report on Form 40-F for the fiscal year ended March 31, 2023 (the “Report”). I, Rajat Marwah, Chief Financial Officer of the

June 22, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

June 22, 2023 F-X

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM F-X APPOINTMENT OF AGENT FOR SERVICE OF PROCESS AND UNDERTAKING A. Name of issuer or person filing ("Filer"): Algoma Steel Group Inc. B. (1) This is [check one]: ☒ an origin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM F-X APPOINTMENT OF AGENT FOR SERVICE OF PROCESS AND UNDERTAKING A. Name of issuer or person filing ("Filer"): Algoma Steel Group Inc. B. (1) This is [check one]: ☒ an original filing for the Filer ☐ an amended filing for the Filer (2) Check the following box if you are filing the Form F-X in paper in accordance with Regul

June 22, 2023 EX-99.5

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

EX-99.5 EXHIBIT 99.5 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a), PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Rajat Marwah, certify that: 1. I have reviewed this annual report on Form 40-F of Algoma Steel Group Inc. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the st

June 22, 2023 EX-99.8

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

EX-99.8 Exhibit 99.8 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No. 333-264063 on Form S-8 and to the use of our reports dated June 21, 2023 relating to the financial statements of Algoma Steel Group Inc. (the “Company”) and the effectiveness of the Company’s internal control over financial reporting appearing in

June 22, 2023 EX-FILING FEES

Calculation of Filing Fee (Form Type) Algoma Steel Group Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Forward Registered and Carry Securities Security Type Security Class Title Fee Calculation Rule or Instruction Amount

Exhibit 107 Calculation of Filing Fee Table F-10 (Form Type) Algoma Steel Group Inc.

June 16, 2023 EX-99.1

Algoma Steel Reports Fatal Incident

Exhibit 99.1 MEDIA RELEASE June 16, 2023 Algoma Steel Reports Fatal Incident SAULT STE. MARIE, Ontario, June 16, 2023 — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or the “Company”), regrets to report a fatal incident involving an employee of a contractor who was retained to perform specialized maintenance work. On the afternoon of June 15th, the worker lost consciousness while cle

June 16, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

June 16, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

424B3 PROSPECTUS SUPPLEMENT NO. 24 Filed Pursuant to Rule 424(b)(3) (to prospectus dated June 30, 2022) Registration No. 333-260534 ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time

June 7, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

June 7, 2023 EX-99.1

Algoma Steel to Announce Fiscal 2023 Fourth Quarter and Full Year Results June 21, 2023

Exhibit 99.1 Algoma Steel to Announce Fiscal 2023 Fourth Quarter and Full Year Results June 21, 2023 June 6, 2023 SAULT STE. MARIE, Ontario, June 06, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its fiscal 2023 fourth quarter and

May 26, 2023 POS EX

As filed with the Securities and Exchange Commission on May 26, 2023.

POS EX As filed with the Securities and Exchange Commission on May 26, 2023. Registration No. 333-260534 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 3 to FORM F-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ALGOMA STEEL GROUP INC. (Exact Name of Registrant as Specified in Its Charter) British Columbia 3312 Not Applicable (State o

May 26, 2023 EX-99.1

Algoma Steel Upsizes ABL Credit Facility and Extends Maturity Date to 2028

Exhibit 99.1 Algoma Steel Upsizes ABL Credit Facility and Extends Maturity Date to 2028 May 25, 2023 SAULT STE. MARIE, Ontario, May 25, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that it has successfully upsized its senior secured asset-base

May 26, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

424B3 1 d505622d424b3.htm 424B3 PROSPECTUS SUPPLEMENT NO. 23 Filed Pursuant to Rule 424(b)(3) (to prospectus dated June 30, 2022) Registration No. 333-260534 ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or

May 26, 2023 EX-10.10

AMENDED AND RESTATED CREDIT AGREEMENT by and among WELLS FARGO CAPITAL FINANCE CORPORATION CANADA, as Agent, WELLS FARGO CAPITAL FINANCE CORPORATION CANADA and BANK OF MONTREAL as Joint Lead Arrangers, WELLS FARGO CAPITAL FINANCE CORPORATION CANADA a

Exhibit 10.10 AMENDED AND RESTATED CREDIT AGREEMENT by and among WELLS FARGO CAPITAL FINANCE CORPORATION CANADA, as Agent, WELLS FARGO CAPITAL FINANCE CORPORATION CANADA and BANK OF MONTREAL as Joint Lead Arrangers, WELLS FARGO CAPITAL FINANCE CORPORATION CANADA and BANK OF MONTREAL as Joint Book Runners, THE LENDERS THAT ARE PARTIES HERETO as the Lenders, ALGOMA STEEL INTERMEDIATE HOLDINGS INC. a

May 26, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2023 Commission File Number 001-40924 A

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

April 7, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2023 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

April 7, 2023 EX-99.1

Algoma Steel Releases ESG Position Statement

EX-99.1 Exhibit 99.1 MEDIA RELEASE April 6, 2023 Algoma Steel Releases ESG Position Statement SAULT STE. MARIE, Ontario, April 6, 2023 — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or the “Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today released its Environmental, Social, and Governance (“ESG”) Position Statement (the “ESG Positio

April 6, 2023 CORRESP

Paul, Weiss, Rifkind, Wharton & Garrison LLP 1285 Avenue of the Americas New York, New York 10019-6064

CORRESP Paul, Weiss, Rifkind, Wharton & Garrison LLP 1285 Avenue of the Americas New York, New York 10019-6064 April 6, 2023 VIA EDGAR Division of Corporation Finance Office of Manufacturing Securities and Exchange Commission 100 F Street, N.

March 31, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

424B3 PROSPECTUS SUPPLEMENT NO. 22 Filed Pursuant to Rule 424(b)(3) (to prospectus dated June 30, 2022) Registration No. 333-260534 ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time

March 31, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number 001-40924

6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Stree

March 31, 2023 CORRESP

Paul, Weiss, Rifkind, Wharton & Garrison LLP 1285 Avenue of the Americas New York, New York 10019-6064

CORRESP Paul, Weiss, Rifkind, Wharton & Garrison LLP 1285 Avenue of the Americas New York, New York 10019-6064 March 31, 2023 VIA EDGAR Division of Corporation Finance Securities and Exchange Commission 100 F Street, N.

March 31, 2023 EX-99.1

Algoma Steel Provides Fiscal 2023 Fourth Quarter Guidance

Exhibit 99.1 Algoma Steel Provides Fiscal 2023 Fourth Quarter Guidance March 30, 2023 SAULT STE. MARIE, Ontario, March 30, 2023 (GLOBE NEWSWIRE) - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today provided guidance for its fiscal fourth quarter ending March 31, 2023. Unless otherwi

March 30, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-260534 PROSPECTUS SUPPLEMENT NO. 21 (to prospectus dated June 30, 2022) ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time

March 30, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

March 30, 2023 EX-99.1

Algoma Steel Group Announces Director Resignation

Exhibit 99.1 Algoma Steel Group Announces Director Resignation March 29, 2023 SAULT STE. MARIE, Ontario, March 29, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced that Brian Pratt has resigned from the Board of Directors for personal reasons, eff

March 14, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

March 14, 2023 EX-99.1

Algoma Steel Appoints EllisDon as Construction Manager for Electric Arc Furnace Project

EX-99.1 Exhibit 99.1 MEDIA RELEASE March 13, 2023 Algoma Steel Appoints EllisDon as Construction Manager for Electric Arc Furnace Project SAULT STE. MARIE, Ontario (March 13, 2023) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or the “Corporation”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today announced the appointment of EllisDon as Cons

March 14, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-260534 PROSPECTUS SUPPLEMENT NO. 20 (to prospectus dated June 30, 2022) ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time

March 2, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-260534 PROSPECTUS SUPPLEMENT NO. 19 (to prospectus dated June 30, 2022) ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time

March 2, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number 001-40924

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street Sa

March 2, 2023 EX-99.1

Algoma Steel Group Announces Renewal of Normal Course Issuer Bid

EX-99.1 2 d472348dex991.htm EX-99.1 Exhibit 99.1 MEDIA RELEASE March 1, 2023 Algoma Steel Group Announces Renewal of Normal Course Issuer Bid SAULT STE. MARIE, ONTARIO (March 1, 2023) – Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”) announced today that the Toronto Stock Exchange (the “TSX”) has approved the Company’s intention to renew its normal course issuer bid (

February 17, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2023 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

February 17, 2023 EX-99.1

Algoma Steel Installs First Structural Columns for Electric Arc Steel Shop

EX-99.1 2 d459851dex991.htm EX-99.1 Exhibit 99.1 Algoma Steel Installs First Structural Columns for Electric Arc Steel Shop February 16, 2023 Ontario Premier Ford Commemorates Project Milestone SAULT STE. MARIE, Ontario, Feb. 16, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, a

February 17, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

Filed Pursuant to Rule 424(b)(3) Registration No. 333-260534 PROSPECTUS SUPPLEMENT NO. 18 (to prospectus dated June 30, 2022) ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time (the

February 14, 2023 SC 13G

CA0156581070 / ALGOMA STEEL GROUP INC / Maple Rock Capital Partners Inc. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

February 14, 2023 EX-99.4

CERTIFICATION

EX-99.4 5 d409207dex994.htm EX-99.4 Exhibit 99.4 CERTIFICATION I, Rajat Marwah, certify that: 1. I have reviewed this report on Form 6-K of Algoma Steel Group Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made,

February 14, 2023 EX-99.2

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at December 31, 2022 and March 31, 2022 and for the three and nine month periods ended December 31, 2022 and 2021

Exhibit 99.2 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at December 31, 2022 and March 31, 2022 and for the three and nine month periods ended December 31, 2022 and 2021 Algoma Steel Group Inc. Condensed Interim Consolidated Statements of Net (Loss) Income (Unaudited) Three months ended December 31, Nine months ended December 31, 2022 2021 2022 2021

February 14, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2023 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name) 105 West Street Sault Ste. M

February 14, 2023 EX-99.1

Algoma Steel Group Reports Fiscal 2023 Third Quarter Results Results In Line with Previously Announced Expectations Completed Phase 1 Plate Mill Modernization Commissioning All Operations Returned to Normal Production Levels at January 1, 2023 Electr

EX-99.1 2 d409160dex991.htm EX-99.1 Exhibit 99.1 MEDIA RELEASE February 13, 2023 Algoma Steel Group Reports Fiscal 2023 Third Quarter Results Results In Line with Previously Announced Expectations Completed Phase 1 Plate Mill Modernization Commissioning All Operations Returned to Normal Production Levels at January 1, 2023 Electric Arc Furnace Construction Advancing as Planned SAULT STE. MARIE, ON

February 14, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2023 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name) 105 West Street Sault Ste. M

February 14, 2023 EX-99.3

CERTIFICATION

Exhibit 99.3 CERTIFICATION I, Michael Garcia, certify that: 1. I have reviewed this report on Form 6-K of Algoma Steel Group Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to th

February 14, 2023 EX-99.1

MANAGEMENT’S DISCUSSION AND ANALYSIS

EX-99.1 2 d409207dex991.htm EX-99.1 Exhibit 99.1 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer t

February 14, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

Filed Pursuant to Rule 424(b)(3) Registration No. 333-260534 PROSPECTUS SUPPLEMENT NO. 17 (to prospectus dated June 30, 2022) ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time (the

February 13, 2023 SC 13G/A

CA0156581070 / ALGOMA STEEL GROUP INC / CONTRARIAN CAPITAL MANAGEMENT, L.L.C. - ALGOMA STEEL GROUP INC. Passive Investment

SC 13G/A 1 p23-0316sc13ga.htm ALGOMA STEEL GROUP INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Algoma Steel Group Inc. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 015658107 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of This Statement) Check the app

February 2, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2023 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

February 2, 2023 EX-99.1

Algoma Steel to Announce Fiscal 2023 Third Quarter Results February 13, 2023

EX-99.1 Exhibit 99.1 MEDIA RELEASE February 1, 2023 Algoma Steel to Announce Fiscal 2023 Third Quarter Results February 13, 2023 SAULT STE. MARIE, Ontario, February 1, 2023—Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that the Company will release its fiscal 2023 third quarter financ

January 12, 2023 SC 13G

CA0156581070 / ALGOMA STEEL GROUP INC / Polus Capital Management Ltd - ALGOMA STEEL GROUP INC. Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Algoma Steel Group Inc. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 015658107 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

January 10, 2023 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2023 Commission File Number 001-409

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2023 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name into English) 105 West Street

January 10, 2023 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

PROSPECTUS SUPPLEMENT NO. 16 (to prospectus dated June 30, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-260534 ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time (the

January 10, 2023 EX-99.1

Algoma Steel Provides Fiscal Third Quarter 2023 Guidance

Exhibit 99.1 Algoma Steel Provides Fiscal Third Quarter 2023 Guidance January 9, 2023 SAULT STE. MARIE, Ontario, Jan. 09, 2023 (GLOBE NEWSWIRE) — Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma” or “the Company”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, today provided guidance for its fiscal third quarter 2023. Unless otherwise specified, all a

November 8, 2022 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2022 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2022 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant?s name) 105 West Street Sault Ste. M

November 8, 2022 EX-99.1

Algoma Steel Group Reports Fiscal 2023 Second Quarter Results Results In Line with Previously Announced Expectations Completed Labour Negotiations and Advanced Plate Mill Modernization Commissioning Electric Arc Furnace Construction Advancing as Plan

Exhibit 99.1 MEDIA RELEASE November 7, 2022 Algoma Steel Group Reports Fiscal 2023 Second Quarter Results Results In Line with Previously Announced Expectations Completed Labour Negotiations and Advanced Plate Mill Modernization Commissioning Electric Arc Furnace Construction Advancing as Planned Repurchased US$400 Million, or ~28% of Shares SAULT STE. MARIE, ONTARIO (November 7, 2022) ? Algoma St

November 8, 2022 EX-99.2

Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. As at September 30, 2022 and March 31, 2022 and for the three and six month periods ended September 30, 2022 and 2021

EX-99.2 3 d420619dex992.htm EX-99.2 Exhibit 99.2 Condensed Interim Consolidated Financial Statements ALGOMA STEEL GROUP INC. (Unaudited) As at September 30, 2022 and March 31, 2022 and for the three and six month periods ended September 30, 2022 and 2021 Algoma Steel Group Inc. Condensed Interim Consolidated Statements of Net Income (Unaudited) Three months ended September 30, Six months ended Sep

November 8, 2022 EX-99.4

CERTIFICATION

EX-99.4 5 d420619dex994.htm EX-99.4 Exhibit 99.4 CERTIFICATION I, Rajat Marwah, certify that: 1. I have reviewed the Management’s Discussion & Analysis and Financial Statements included in this current report on Form 6-K of Algoma Steel Group Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the s

November 8, 2022 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2022 Commission File Number 001-40

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2022 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name) 105 West Street Sault Ste. M

November 8, 2022 EX-99.3

CERTIFICATION

EX-99.3 4 d420619dex993.htm EX-99.3 Exhibit 99.3 CERTIFICATION I, Michael Garcia, certify that: 1. I have reviewed the Management’s Discussion & Analysis and Financial Statements included in this current report on Form 6-K of Algoma Steel Group Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the

November 8, 2022 EX-99.1

MANAGEMENT’S DISCUSSION AND ANALYSIS

EX-99.1 2 d420619dex991.htm EX-99.1 Exhibit 99.1 MANAGEMENT’S DISCUSSION AND ANALYSIS The following Management Discussion and Analysis (“MD&A”) contains information regarding the financial position and financial performance of Algoma Steel Group Inc. and its consolidated subsidiaries and unless the context otherwise requires, all references to “Algoma,” “the Company,”, “we,” “us,” or “our” refer t

November 8, 2022 424B3

ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants

Filed Pursuant to Rule 424(b)(3) Registration No. 333-260534 PROSPECTUS SUPPLEMENT NO. 15 (to prospectus dated June 30, 2022) ALGOMA STEEL GROUP INC. 129,836,439 Common Shares 604,000 Warrants to Purchase Common Shares 24,179,000 Common Shares Underlying Warrants This prospectus supplement amends and supplements the prospectus dated June 30, 2022, as supplemented or amended from time to time (the

October 27, 2022 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2022 Commission File Number 001-409

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2022 Commission File Number 001-40924 ALGOMA STEEL GROUP INC. (Exact name of Registrant as specified in its charter) N/A (Translation of Registrant’s name) 105 West Street Sault Ste. Ma

October 27, 2022 EX-99.1

Algoma Steel to Announce Fiscal 2023 Second Quarter Results November 7, 2022

EX-99.1 2 d414944dex991.htm EX-99.1 Exhibit 99.1 MEDIA RELEASE October 26, 2022 Algoma Steel to Announce Fiscal 2023 Second Quarter Results November 7, 2022 SAULT STE. MARIE, Ontario, October 26, 2022 - Algoma Steel Group Inc. (NASDAQ: ASTL; TSX: ASTL) (“Algoma”), a leading Canadian producer of hot and cold rolled steel sheet and plate products, announced today that Algoma will release its fiscal

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