# EDGAR Filing Document

**Accession Number:** 0001860805
**File Stem:** 0001193125-25-213334
**Filing Date:** 2025-9
**Character Count:** 9448
**Document Hash:** 50cc79201704ac48806a2355c6ddc7b9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-213334.hdr.sgml**: 20250923

**ACCESSION NUMBER**: 0001193125-25-213334

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250923

**DATE AS OF CHANGE**: 20250923

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Algoma Steel Group Inc.
- **CENTRAL INDEX KEY:** 0001860805
- **STANDARD INDUSTRIAL CLASSIFICATION:** STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A1
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-93490
- **FILM NUMBER:** 251333799

**BUSINESS ADDRESS:**
- **STREET 1:** 105 WEST STREET
- **CITY:** SAULT STE. MARIE
- **STATE:** A6
- **ZIP:** P6A 7B4
- **BUSINESS PHONE:** 705-945-2351

**MAIL ADDRESS:**
- **STREET 1:** 105 WEST STREET
- **CITY:** SAULT STE. MARIE
- **STATE:** A6
- **ZIP:** P6A 7B4

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** 1295908 B.C. LTD.
- **DATE OF NAME CHANGE:** 20210505
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Zekelman Industries, Inc.
- **CENTRAL INDEX KEY:** 0001742916
- **STANDARD INDUSTRIAL CLASSIFICATION:** STEEL PIPE & TUBES [3317]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 204467287
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 227 WEST MONROE STREET, SUITE 2600
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 312-275-1600

**MAIL ADDRESS:**
- **STREET 1:** 227 WEST MONROE STREET, SUITE 2600
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

### Attached PDF Documents

**Attachment 1:** `ck0000000000-ex99_b.pdf`

_No text found in this document._

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 1)**

**Algoma Steel Group Inc.**

*(Name of Issuer)*

**Common Shares, without par value**

*(Title of Class of Securities)*

**015658107**

*(CUSIP Number)*

**Michael P. McNamara**<br>Zekelman Industries, Inc.<br>227 West Monroe Street, Suite 2600<br>Chicago IL 60606<br>(312) 275-1600

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**09/10/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **015658107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Zekelman Industries, Inc.** | Name of reporting person<br>**Zekelman Industries, Inc.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**3229998.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**3229998.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**3229998.00** | Aggregate amount beneficially owned by each reporting person<br>**3229998.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**3.08%** | Percent of class represented by amount in Row (11)<br>**3.08%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** The percentage reported in Row 13 is based on 104,933,802 Common Shares outstanding as of July 17, 2025, as reported in the Issuer's registration statement on Form F-10 filed with the Commission on July 18, 2025.

| **CUSIP No.** | **015658107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Atlas Tube Canada ULC** | Name of reporting person<br>**Atlas Tube Canada ULC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**ALBERTA** | Citizenship or place of organization<br>**ALBERTA** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**3229998.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**3229998.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**3229998.00** | Aggregate amount beneficially owned by each reporting person<br>**3229998.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**3.08%** | Percent of class represented by amount in Row (11)<br>**3.08%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** The percentage reported in Row 13 is based on 104,933,802 Common Shares outstanding as of July 17, 2025, as reported in the Issuer's registration statement on Form F-10 filed with the Commission on July 18, 2025.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Shares, without par value

**(b) Name of Issuer:**
Algoma Steel Group Inc.

**(c) Address of Issuer's Principal Executive Offices:**
105 WEST STREET, SAULT STE., MARIE, Ontario, Z4, P6A 7B4

This Amendment No. 1 ("Amendment") amends and supplements the Schedule 13D initially filed by the Reporting Persons on July 31, 2024 (the "Original Schedule 13D", and as amended by this Amendment, the "Schedule 13D"). Except as specifically modified hereby, the Original Schedule 13D remains unchanged. Capitalized terms but not otherwise defined herein shall have the meanings ascribed to them in the Original Schedule 13D.

As a result of the transactions described herein, this Amendment represents the final amendment to the Schedule 13D and constitutes an "exit filing" for each of the Reporting Persons.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5(a) is hereby amended and supplemented as follows:

The information required by this Item 5(a) is set forth in Rows (11) and (13) of the cover page (including the accompanying comments thereto) for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.

**(b)**
Item 5(b) is hereby amended and supplemented as follows:

The information required by this Item 5(a) is set forth in Rows (7) through (10) of the cover page (including the accompanying comments thereto) for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.

**(c)**
Item 5(c) is hereby amended and supplemented as follows:

The transactions in securities of the Issuer by the Reporting Persons during the past sixty days are set forth in Schedule B and are incorporated herein by reference. Each such transaction was effected directly by Atlas Tube.

### 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.

**Reporting Person:** Zekelman Industries, Inc.

**Signature:** /s/ Michael P. McNamara

**Name/Title:** Michael P. McNamara, President

**Date:** 09/23/2025

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.

**Reporting Person:** Atlas Tube Canada ULC

**Signature:** /s/ Michael P. McNamara

**Name/Title:** Michael P. McNamara, Vice President

**Date:** 09/23/2025