{"filing":{"accession_number":"0001193125-26-379439","cik":"0001860805","ticker":"ASTLW","company_name":"Algoma Steel Group Inc.","form":"6-K","filing_date":"2026-09-02","report_date":"2026-09-02","primary_document":"d110210d6k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1860805/000119312526379439/d110210d6k.htm"},"events":[{"id":31187,"run_id":28606,"accession_number":"0001193125-26-379439","anchor_item_number":"EX-99.1","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"This media release discloses an unplanned outage at Algoma's Lake Superior Power generating facility that has disrupted steelmaking operations. While the company has resumed EAF production under interim arrangements since August 29, 2026, the disclosure addresses a material operational disruption and ongoing efforts to restore full generating capacity through turbine repair or replacement. This is a significant operational event affecting production and shipments, but does not fit the specific categories of workforce reduction, material litigation, debt covenant breach, or other named event types—making it an operational_other event.","company_name":"Algoma Steel Group Inc.","ticker":"ASTLW","filing_date":"2026-09-02","form":"6-K","submitted_at":null,"items":[{"id":34005,"accession_number":"0001193125-26-379439","item_number":"EX-99.1","item_title":"d110210dex991.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"This media release discloses an unplanned outage at Algoma's Lake Superior Power generating facility that has disrupted steelmaking operations. While the company has resumed EAF production under interim arrangements since August 29, 2026, the disclosure addresses a material operational disruption and ongoing efforts to restore full generating capacity through turbine repair or replacement. This is a significant operational event affecting production and shipments, but does not fit the specific categories of workforce reduction, material litigation, debt covenant breach, or other named event types—making it an operational_other event.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-09-02T12:48:37.330427+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":34005,"accession_number":"0001193125-26-379439","item_number":"EX-99.1","item_title":"d110210dex991.htm","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"This media release discloses an unplanned outage at Algoma's Lake Superior Power generating facility that has disrupted steelmaking operations. While the company has resumed EAF production under interim arrangements since August 29, 2026, the disclosure addresses a material operational disruption and ongoing efforts to restore full generating capacity through turbine repair or replacement. This is a significant operational event affecting production and shipments, but does not fit the specific categories of workforce reduction, material litigation, debt covenant breach, or other named event types—making it an operational_other event.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-09-02T12:48:37.330427+00:00","company_name":"Algoma Steel Group Inc.","ticker":"ASTLW","filing_date":"2026-09-02"}]}