{"filing":{"accession_number":"0000067716-26-000064","cik":"0000067716","ticker":"MDU","company_name":"MDU RESOURCES GROUP INC","form":"8-K","filing_date":"2026-08-06","report_date":"2026-08-06","primary_document":"mdu-20260806.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/67716/000006771626000064/mdu-20260806.htm"},"events":[{"id":25323,"run_id":22976,"accession_number":"0000067716-26-000064","anchor_item_number":"2.02","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.97,"summary":"MDU Resources issued a news release on August 6, 2026, announcing second quarter 2026 financial results, including consolidated net income of $21.3 million (up 55.5% year-over-year), diluted earnings per share of $0.10 (up 42.9%), and reaffirmed 2026 guidance of $0.93 to $1.00 per share.","company_name":"MDU RESOURCES GROUP INC","ticker":"MDU","filing_date":"2026-08-06","form":"8-K","submitted_at":null,"items":[{"id":26115,"accession_number":"0000067716-26-000064","item_number":"2.02","item_title":"Results of Operations and Financial Condition.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"MDU Resources issued a news release on August 6, 2026, announcing second quarter 2026 financial results, including consolidated net income of $21.3 million (up 55.5% year-over-year), diluted earnings per share of $0.10 (up 42.9%), and reaffirmed 2026 guidance of $0.93 to $1.00 per share. The disclosure is a standard quarterly earnings announcement with detailed segment results and forward guidance, clearly falling within the earnings_release category under Item 2.02.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-08T02:31:59.232906+00:00","company_name":"","ticker":null,"filing_date":""},{"id":26116,"accession_number":"0000067716-26-000064","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"MDU Resources disclosed its second quarter 2026 financial results via a news release furnished under Item 7.01 (Regulation FD Disclosure). The release reports consolidated net income of $21.3 million (up 55.5% year-over-year), earnings per share of $0.10 (up 42.9%), and reaffirms 2026 guidance of $0.93 to $1.00 per share. The supplemental exhibit (EX-99) contains the full earnings release with detailed segment results, regulatory updates, and strategic project progress. This is a standard quarterly earnings disclosure material to investors.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-08T02:31:59.232906+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":26115,"accession_number":"0000067716-26-000064","item_number":"2.02","item_title":"Results of Operations and Financial Condition.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"MDU Resources issued a news release on August 6, 2026, announcing second quarter 2026 financial results, including consolidated net income of $21.3 million (up 55.5% year-over-year), diluted earnings per share of $0.10 (up 42.9%), and reaffirmed 2026 guidance of $0.93 to $1.00 per share. The disclosure is a standard quarterly earnings announcement with detailed segment results and forward guidance, clearly falling within the earnings_release category under Item 2.02.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-08T02:31:59.232906+00:00","company_name":"MDU RESOURCES GROUP INC","ticker":"MDU","filing_date":"2026-08-06"},{"id":26116,"accession_number":"0000067716-26-000064","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"MDU Resources disclosed its second quarter 2026 financial results via a news release furnished under Item 7.01 (Regulation FD Disclosure). The release reports consolidated net income of $21.3 million (up 55.5% year-over-year), earnings per share of $0.10 (up 42.9%), and reaffirms 2026 guidance of $0.93 to $1.00 per share. The supplemental exhibit (EX-99) contains the full earnings release with detailed segment results, regulatory updates, and strategic project progress. This is a standard quarterly earnings disclosure material to investors.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-08T02:31:59.232906+00:00","company_name":"MDU RESOURCES GROUP INC","ticker":"MDU","filing_date":"2026-08-06"}]}