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 Street

Sault Ste. Marie, Ontario

P6A 7B4, Canada

(705) 945-2351

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F ☐   Form 40-F ☒

EXHIBIT INDEX

2

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

3

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 of shareholders held on September 26, 2023 (the “Meeting”).

All of the nominees listed in the management information circular prepared in connection with the Meeting were elected as directors of the Company. The Company received proxies and virtual votes at the Meeting as set out below:

The Company also reports that the appointment of Deloitte LLP as the Company’s auditors for the 2023 fiscal year was passed by a majority of the votes represented at the Meeting.

The Company’s full report of voting results on matters presented at the Meeting can be found under the Company’s profile on SEDAR+ at www.sedarplus.ca and on the Securities and Exchange Commission’s EDGAR website at www.sec.gov.

Algoma Steel Inc. | 105 West Street, Sault Ste. Marie, ON, Canada P6A 7B4 | T: 705-945-2351 F: 705-945-2203 | algoma.com

YOUR PARTNER IN STEEL. SINCE 1901

About Algoma Steel Group Inc.

Based in Sault Ste. Marie, Ontario, Canada, Algoma is a fully integrated producer of hot and cold rolled steel products including sheet and plate. Driven by a purpose to build better lives and a greener future, Algoma is positioned to deliver responsive, customer-driven product solutions to applications in the automotive, construction, energy, defense, and manufacturing sectors. Algoma is a key supplier of steel products to customers in North America and is the only producer of discrete plate products in Canada. Its state-of-the-art Direct Strip Production Complex (“DSPC”) is one of the lowest-cost producers of hot rolled sheet steel (HRC) in North America.

Algoma is on a transformation journey, modernizing its plate mill and adopting electric arc technology that builds on the strong principles of recycling and environmental stewardship to significantly lower carbon emissions. Today Algoma is investing in its people and processes, working safely, as a team to become one of North America’s leading producers of green steel.

As a founding industry in their community, Algoma is drawing on the best of its rich steelmaking tradition to deliver greater value, offering North America the comfort of a secure steel supply and a sustainable future as your partner in steel.

For more information, please contact:

Michael Moraca

Treasurer & Investor Relations Officer

Algoma Steel Group Inc.

Phone: 705.945.3300

E-mail: IR@algoma.com

Algoma Steel Inc. | 105 West Street, Sault Ste. Marie, ON, Canada P6A 7B4 | T: 705-945-2351 F: 705-945-2203 | algoma.com

YOUR PARTNER IN STEEL. SINCE 1901

2

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 upon at the Annual General Meeting of Shareholders of the Company were voted upon by proxy or virtually at the meeting. Full details of the matters are set out in the Company’s management information circular dated August 1, 2023, which is available on SEDAR+ at www.sedarplus.ca and on EDGAR at www.sec.gov.

Each of the following individuals were elected as directors of the Company for a term expiring at the conclusion of the next annual meeting of shareholders of the Company, or until their successors are elected or appointed. The voting results were as follows:

Deloitte LLP was appointed as the auditor of the Company until the next annual meeting of the shareholders of the Company or until its successor is appointed and the directors of the Company were authorized to fix the remuneration of such auditor. The voting results were as follows:

Dated this 26^th day of September, 2023.