{"filing":{"accession_number":"0001993004-26-000046","cik":"0001993004","ticker":"NWE","company_name":"NorthWestern Energy Group, Inc.","form":"8-K","filing_date":"2026-06-22","report_date":null,"primary_document":"nwe-20260615.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1993004/000199300426000046/nwe-20260615.htm"},"events":[{"id":12682,"run_id":11252,"accession_number":"0001993004-26-000046","anchor_item_number":"1.01","event_type":"debt_issuance","event_domain":"financial","is_material":true,"confidence":0.95,"summary":"NorthWestern Energy Public Service Corporation issued $150 million principal amount of South Dakota First Mortgage Bonds on June 15, 2026, with a 5.51% interest rate and 10-year maturity, secured by first mortgage lien.","company_name":"NorthWestern Energy Group, Inc.","ticker":"NWE","filing_date":"2026-06-22","form":"8-K","submitted_at":null,"items":[{"id":9602,"accession_number":"0001993004-26-000046","item_number":"1.01","item_title":"Entry into Material Definitive Agreement","event_type":"debt_issuance","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"NorthWestern Energy Public Service Corporation issued $150 million principal amount of South Dakota First Mortgage Bonds on June 15, 2026, with a 5.51% interest rate and 10-year maturity. This is a direct creation of a new financial obligation secured by first mortgage lien, clearly falling under debt issuance. The materiality is evident from the substantial principal amount and the formal indenture structure governing the bonds.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-22T15:33:15.463686+00:00","company_name":"","ticker":null,"filing_date":""},{"id":9603,"accession_number":"0001993004-26-000046","item_number":"2.03","item_title":"Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.","event_type":"debt_issuance","event_domain":"financial","is_material":true,"confidence":0.85,"reasoning":"Item 2.03 is the dedicated disclosure item for creation of direct financial obligations, typically debt issuances. The filing incorporates Item 1.01 by reference, which commonly covers material acquisitions or debt-related transactions. The Item 2.03 heading itself signals a debt or financial obligation event material to investors.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-22T15:33:15.463686+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":9602,"accession_number":"0001993004-26-000046","item_number":"1.01","item_title":"Entry into Material Definitive Agreement","event_type":"debt_issuance","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"NorthWestern Energy Public Service Corporation issued $150 million principal amount of South Dakota First Mortgage Bonds on June 15, 2026, with a 5.51% interest rate and 10-year maturity. This is a direct creation of a new financial obligation secured by first mortgage lien, clearly falling under debt issuance. The materiality is evident from the substantial principal amount and the formal indenture structure governing the bonds.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-22T15:33:15.463686+00:00","company_name":"NorthWestern Energy Group, Inc.","ticker":"NWE","filing_date":"2026-06-22"},{"id":9603,"accession_number":"0001993004-26-000046","item_number":"2.03","item_title":"Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.","event_type":"debt_issuance","event_domain":"financial","is_material":true,"confidence":0.85,"reasoning":"Item 2.03 is the dedicated disclosure item for creation of direct financial obligations, typically debt issuances. The filing incorporates Item 1.01 by reference, which commonly covers material acquisitions or debt-related transactions. The Item 2.03 heading itself signals a debt or financial obligation event material to investors.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-06-22T15:33:15.463686+00:00","company_name":"NorthWestern Energy Group, Inc.","ticker":"NWE","filing_date":"2026-06-22"}]}