Security key
015658107
Algoma Steel Group Inc. - Common Shares, no par value (ASTL)
CUSIP: 015658107
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Shares, no par value
- Total 13F shares
- 198,557
- Total 13F value
- $802,272
- Share change
- -106,725
- SEC-reported price per share
- $4.05
- Number of holders
- 12
- Value change
- -$412,490
- Number of buys
- 4
- Number of sells
- 6
- Shares outstanding
- 105,502,106
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
12
Top holders
10
ASTL full security history
Ownership snapshot
Full 13F holder table
Algoma Steel Group Inc. SEC filings
Algoma Steel Group Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of ASTL - Algoma Steel Group Inc. - Common Shares, no par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Maple Rock Capital Partne...
Disclosed value leader
Maple Rock Capital Partne...
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 15%
13D/G row: Maple Rock Capital Partners Inc.
Showing 1-6 of 15 holder rows.
Quick read
Maple Rock Capital Partners Inc. leads the comparable SEC ownership view at 15%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Maple Rock Capital Partners Inc.'s linked filing trail.
Comparable ownership
Top 5
Maple Rock Capital Partners Inc.
15%
MMCAP International Inc. SPC
12%
DONALD SMITH & CO., INC.
5.8%
Stoney Lonesome HF LP
5.4%
BlackRock, Inc.
3.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Maple Rock Capital Partners Inc. |
13D/G
13F
Company
|
15%
|
$75,034,153
15,930,818 shares
|
+$9,122,742 | 31 Mar 2026 |
| MMCAP International Inc. SPC |
13D/G
13F
Company
|
12%
|
$60,502,880
12,845,622 shares
|
+$6,395,054 | 31 Mar 2026 |
| DONALD SMITH & CO., INC. |
13D/G
13F
Company
|
5.8%
|
$28,396,256
6,028,929 shares
|
+$787,974 | 31 Mar 2026 |
| Stoney Lonesome HF LP |
13D/G
COGHILL CLINT D
|
5.4%
|
$40,931,069
5,864,050 shares
|
+$2,830,397 | 30 Jun 2025 |
| BlackRock, Inc. |
13D/G
13F
Company
|
3.7%
|
$19,448,211
3,835,939 shares
|
$0 | 31 Mar 2025 |
| Zekelman Industries, Inc. |
13D/G
|
3.1%
|
$16,408,390
3,229,998 shares
|
$0 | 10 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
12
Shares
198,557
Rows available
12
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
98
Q2 2026 holders
12
Holder diff
-86
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|