{"filing":{"accession_number":"0001193125-26-429192","cik":"0001130464","ticker":"BKH","company_name":"BLACK HILLS CORP /SD/","form":"8-K","filing_date":"2026-10-22","report_date":"2026-10-22","primary_document":"bkh-20261022.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1130464/000119312526429192/bkh-20261022.htm"},"events":[{"id":37370,"run_id":34448,"accession_number":"0001193125-26-429192","anchor_item_number":"7.01","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.92,"summary":"The filing discloses a material acquisition in progress: Black Hills Corporation and NorthWestern Energy Group have a proposed merger pending final regulatory approval from the Montana Public Service Commission (expected before November 12, 2026). The press release announces the anticipated name and ticker symbol of the combined entity (\"Bright Horizon Energy Corporation\" trading as \"HZN\"), contingent on merger completion. This is a change-of-control transaction that has already received shareholder and multi-state regulatory approvals and is in the final stages of completion, making it a material M\u0026A event under Item 1.01/2.01.","company_name":"BLACK HILLS CORP /SD/","ticker":"BKH","filing_date":"2026-10-22","form":"8-K","submitted_at":null,"items":[{"id":42062,"accession_number":"0001193125-26-429192","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.92,"reasoning":"The filing discloses a material acquisition in progress: Black Hills Corporation and NorthWestern Energy Group have a proposed merger pending final regulatory approval from the Montana Public Service Commission (expected before November 12, 2026). The press release announces the anticipated name and ticker symbol of the combined entity (\"Bright Horizon Energy Corporation\" trading as \"HZN\"), contingent on merger completion. This is a change-of-control transaction that has already received shareholder and multi-state regulatory approvals and is in the final stages of completion, making it a material M\u0026A event under Item 1.01/2.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-23T10:02:07.576828+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":42062,"accession_number":"0001193125-26-429192","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"ma_activity","event_domain":"operational","is_material":true,"confidence":0.92,"reasoning":"The filing discloses a material acquisition in progress: Black Hills Corporation and NorthWestern Energy Group have a proposed merger pending final regulatory approval from the Montana Public Service Commission (expected before November 12, 2026). The press release announces the anticipated name and ticker symbol of the combined entity (\"Bright Horizon Energy Corporation\" trading as \"HZN\"), contingent on merger completion. This is a change-of-control transaction that has already received shareholder and multi-state regulatory approvals and is in the final stages of completion, making it a material M\u0026A event under Item 1.01/2.01.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-10-23T10:02:07.576828+00:00","company_name":"BLACK HILLS CORP /SD/","ticker":"BKH","filing_date":"2026-10-22"}]}