{"schema":"rootz.ai/sec-company/v1","layer":1,"cik":"0001993004","name":"NorthWestern Energy Group, Inc.","summary":"NorthWestern Energy Group, Inc. (doing business as NorthWestern Energy) provides electricity and natural gas to approximately 850,300 customers in Montana, South Dakota, Nebraska, and Yellowstone National Park. Services include generation, purchase, transmission, storage, and distribution of electricity and natural gas. Operations are conducted through subsidiaries NW Corp (Montana/Yellowstone) and NWE Public Service (South Dakota/Nebraska). The company operates two segments: electric utility operations and natural gas utility operations, serving residential, commercial, and industrial customers.","people":[],"products":[{"name":"Electric Utility Service","type":"service","description":"Generation, purchase, transmission, and distribution of electricity to ~850,300 customers in Montana, South Dakota, Nebraska, and Yellowstone National Park."},{"name":"Natural Gas Utility Service","type":"service","description":"Production, purchase, transmission, storage, and distribution of natural gas to customers in Montana, South Dakota, and Nebraska."},{"name":"Wholesale Transmission Service","type":"service","description":"Firm and non-firm transmission services for eligible transmission customers pursuant to FERC Open Access Transmission Tariff (OATT)."}],"partnerships":[{"partner_name":"Talen Montana, LLC","partnership_type":"strategic","description":"Talen operates Colstrip Units 3 & 4 and holds a 30% ownership interest in Colstrip Unit 3; reciprocal sharing agreement with NorthWestern on output and costs.","start_date":null},{"partner_name":"Avista Corporation","partnership_type":"strategic","description":"NorthWestern acquired 222 MW ownership interest in Colstrip Units 3 & 4 from Avista on January 1, 2026; transmission system interconnected with Avista.","start_date":null},{"partner_name":"Puget Sound Energy","partnership_type":"strategic","description":"NorthWestern acquired 370 MW ownership interest in Colstrip Units 3 & 4 from Puget Sound Energy on January 1, 2026.","start_date":null},{"partner_name":"Black Hills Corporation","partnership_type":"strategic","description":"Pending all-stock merger of equals agreement signed August 18, 2025; NorthWestern to become wholly owned subsidiary of Black Hills, renamed Bright Horizon Energy.","start_date":null},{"partner_name":"Bonneville Power Administration","partnership_type":"strategic","description":"Transmission system directly interconnected with BPA, enabling interchange, purchase, and sale of power across western systems.","start_date":null},{"partner_name":"Idaho Power Company","partnership_type":"strategic","description":"Transmission system directly interconnected with Idaho Power, enabling interchange, purchase, and sale of power.","start_date":null},{"partner_name":"PacifiCorp","partnership_type":"strategic","description":"Transmission system directly interconnected with PacifiCorp, enabling interchange, purchase, and sale of power.","start_date":null}],"affiliations":[],"origin":{"leaf":"455e04a859cf6866e0037eba8e23d60a2f7acd8712bb9d25ee5c6317acb8a636","formula":"v2: sha256( sha256(content) || parent || source_accession )","content_sha256":"582be1a3a7d3caf732e0a69eddd144b9c39406bc48ed6a896992c83c8d8c4886","parent":"56570d63486d3f57e765cf6a12633938d24f0becc5110c4464d09e295f797fbf","source":"0001993004-26-000006","chain":"sec.gov/EDGAR (retrieved over TLS, accession recorded) > origin.rootz.global extraction > this response","registry":"origin.rootz.global","verify":"Recompute it: sha256(sha256(<this response body minus the origin block>) || parent || source_accession). 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