Algoma Steel Group Inc. (ASTL) gains 5.01% holder Donald Smith & Co.

Rhea-AI Filing Summary

Algoma Steel Group Inc. reported that institutional investor Donald Smith & Co., Inc., together with DSCO Value Fund, L.P., has filed as a beneficial owner of Algoma’s common shares. The group reports beneficial ownership of 5,277,631 common shares, representing 5.01% of the outstanding class.

Donald Smith & Co., Inc. and DSCO Value Fund, L.P. report sole power to vote 5,176,331 shares and sole power to dispose of 5,277,631 shares, with no shared voting or dispositive power. The filing explains that dividends and sale proceeds ultimately accrue to underlying advisory and fund clients, with no single client holding more than 5% of the class.

Key Figures

Beneficially owned shares: 5,277,631 shares Percent of class: 5.01% Sole voting power: 5,176,331 shares +2 more

5 metrics

Beneficially owned shares 5,277,631 shares Common shares of Algoma Steel Group Inc. reported as beneficially owned

Percent of class 5.01% Portion of Algoma Steel Group Inc. common stock beneficially owned

Sole voting power 5,176,331 shares Shares over which the reporting group has sole power to vote

Sole dispositive power 5,277,631 shares Shares over which the reporting group has sole power to dispose

DSCO Value Fund holdings 53,691 shares Algoma Steel Group Inc. shares held with sole voting and dispositive power by DSCO Value Fund, L.P.

Key Terms

beneficially owned, sole power to vote, sole power to dispose, investment advisor, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 5,277,631"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole power to vote financial

"Number of shares as to which the person has | (i) Sole power to vote"

sole power to dispose financial

"(iii) Sole power to dispose or to direct the disposition of"

investment advisor financial

"institutional clients which Donald Smith & Co., Inc. serves as investment advisor"

An investment advisor is a person or firm that provides personalized guidance on buying, selling and managing investments and often oversees client portfolios for a fee. For investors this matters because the advisor shapes risk, costs and long-term returns, and is typically required by law to act in the client’s best interests — think of them as a financial coach or GPS that helps navigate choices and avoid costly detours.

Schedule 13G regulatory

"various persons have the right ... Common Stock of Algoma Steel Group, Inc. No one person’s interest"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

What percentage of Algoma Steel Group Inc. (ASTL) does Donald Smith & Co., Inc. beneficially own?

Donald Smith & Co., Inc. and DSCO Value Fund, L.P. report beneficial ownership of 5.01% of Algoma Steel Group Inc.’s common shares, representing 5,277,631 shares held on behalf of advisory and fund clients.

How many Algoma Steel Group Inc. (ASTL) shares are reported as beneficially owned?

The filing reports that Donald Smith & Co., Inc. and DSCO Value Fund, L.P. beneficially own 5,277,631 Algoma Steel Group Inc. common shares, which together represent 5.01% of the company’s outstanding common stock class.

What voting power does Donald Smith & Co., Inc. have over Algoma Steel Group Inc. (ASTL) shares?

Donald Smith & Co., Inc. and DSCO Value Fund, L.P. report sole power to vote a total of 5,176,331 Algoma Steel Group Inc. shares, with no shared voting power disclosed in this ownership filing.

Who ultimately receives dividends and sale proceeds from the Algoma Steel Group Inc. (ASTL) shares?

According to the filing, institutional clients of Donald Smith & Co., Inc. and various other persons ultimately receive dividends and sale proceeds. No single client or person is stated to hold more than 5% of Algoma’s outstanding common stock.

What role does DSCO Value Fund, L.P. play in the Algoma Steel Group Inc. (ASTL) stake?

DSCO Value Fund, L.P. is identified as part of the reporting group and holds 53,691 Algoma Steel Group Inc. shares, with sole voting and sole dispositive power over this portion of the reported beneficial ownership.

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Available on EDGAR 08/11/2026 - 11:59 AM Accepted by SEC EDGAR 08/11/2026 - 11:58 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Algoma Steel Group Inc.

(Name of Issuer)

Common

(Title of Class of Securities)

015658107

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 015658107

1

Names of Reporting Persons

DONALD SMITH & CO., INC.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 5,122,640.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 5,223,940.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,277,631.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): 015658107

1

Names of Reporting Persons

DSCO Value Fund, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 53,691.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 53,691.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,277,631.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.0 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Algoma Steel Group Inc.
(b)	Address of issuer's principal executive offices: 105 WEST STREET, SAULT STE. MARIE, ONTARIO, CANADA, P6A 7B4.
Item 2.
(a)	Name of person filing: Donald Smith & Co., Inc.
(b)	Address or principal business office or, if none, residence: 152 West 57th Street, 29th Floor New York, NY 10019
(c)	Citizenship: A Delaware Corporation
(d)	Title of class of securities: Common
(e)	CUSIP Number(s): 015658107
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 5,277,631
(b)	Percent of class: 5.01%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Donald Smith & Co., Inc. 5,122,640 DSCO Value Fund, L.P. 53,691
	(ii) Shared power to vote or to direct the vote: SEE ITEM 6
	(iii) Sole power to dispose or to direct the disposition of: Donald Smith & Co., Inc. 5,223,940 DSCO Value Fund, L.P. 53,691
	(iv) Shared power to dispose or to direct the disposition of: SEE ITEM 6
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. 1. Donald Smith & Co., Inc. does not serve as custodian of the assets of any of its clients; accordingly, in each instance only the client or the client?s custodian or trustee bank has the right to receive dividends paid with respect to, and proceeds from the sale of, such securities. The ultimate power to direct the receipt of dividends paid with respect to, and the proceeds from the sale of, such securities, is vested in the institutional clients which Donald Smith & Co., Inc. serves as investment advisor. Any and all discretionary authority which has been delegated to Donald Smith & Co., Inc. may be revoked in whole or in part at any time. To the knowledge of Donald Smith & Co., Inc., with respect to all securities reported in this schedule owned by advisory clients of Donald Smith & Co., Inc., not more than 5% of the class of such securities is owned by any one client. 2. With respect to the remaining securities owned, various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Common Stock of Algoma Steel Group, Inc. No one person?s interest in the Common Stock of Algoma Steel Group, Inc. is more than five percent of the total outstanding Common Stock.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Donald Smith & Co., Inc. IA DSCO Value Fund, L.P. PN
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

DONALD SMITH & CO., INC.

Signature:	Richard L. Greenberg
Name/Title:	CEO and Co-CIO
Date:	08/11/2026

DSCO Value Fund, L.P.

Signature:	Richard L. Greenberg
Name/Title:	CEO and Co-CIO
Date:	08/11/2026