Algoma Steel Group Inc. has 17 Schedule 13D or 13G filings on record since 2025-08-13. 4 holders' latest filing reports 5% or more of common shares, no par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Maple Rock Capital Partners Inc. | 15.1% | 15,930,818 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| MMCAP International Inc. SPC | 10.4% | 10,954,738 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| CDC Financial, Inc. | 5.4% | 5,848,780 | SCHEDULE 13G/A, 2025-08-14 | 2025-06-30 |
| Donald Smith & Co., Inc. | 5% | 5,277,631 | SCHEDULE 13G, 2026-08-11 | 2026-06-30 |
| Zekelman Industries, Inc. | 3.08% | 3,229,998 | SCHEDULE 13D/A, 2025-09-23 | 2025-09-10 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-13 | Donald Smith & Co., Inc. | 5.8% | SCHEDULE 13G |
| 2025-08-14 | Maple Rock Capital Partners Inc. | 9.9% | SCHEDULE 13D/A |
| 2025-08-14 | CDC Financial, Inc. | 5.4% | SCHEDULE 13G/A |
| 2025-08-14 | MMCAP International Inc. SPC | 6.9% | SCHEDULE 13G/A |
| 2025-08-28 | Maple Rock Capital Partners Inc. | 9.9% | SCHEDULE 13G |
| 2025-09-23 | Zekelman Industries, Inc. | 3.08% | SCHEDULE 13D/A |
| 2025-11-07 | Maple Rock Capital Partners Inc. | 13.3% | SCHEDULE 13G/A |
| 2025-11-12 | Donald Smith & Co., Inc. | 5.7% | SCHEDULE 13G |
| 2025-11-14 | MMCAP International Inc. SPC | 7.7% | SCHEDULE 13G/A |
| 2025-11-20 | MMCAP International Inc. SPC | 10% | SCHEDULE 13G/A |
| 2026-02-12 | Donald Smith & Co., Inc. | 5.6% | SCHEDULE 13G |
| 2026-02-17 | MMCAP International Inc. SPC | 10.9% | SCHEDULE 13G/A |
| 2026-05-13 | Donald Smith & Co., Inc. | 5.8% | SCHEDULE 13G |
| 2026-05-15 | Maple Rock Capital Partners Inc. | 15.1% | SCHEDULE 13G/A |
| 2026-05-15 | MMCAP International Inc. SPC | 12.2% | SCHEDULE 13G/A |
| 2026-08-11 | Donald Smith & Co., Inc. | 5% | SCHEDULE 13G |
| 2026-08-14 | MMCAP International Inc. SPC | 10.4% | SCHEDULE 13G/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.