Boardroom Alpha
10-K primary document
NWE · Annual Report (Form 10-K) · Filed February 12, 2026

Northwestern Energy Group Inc10-K exhibit

exhibit21subsidiaries2025.htm
Document

Exhibit 21
DIRECT AND INDIRECT SUBSIDIARIES OF
NorthWestern Energy Group, Inc.
As of December 31, 2025
NameState of Jurisdiction of Incorporation or Limited Partnership
NorthWestern CorporationDelaware
NorthWestern Energy Public Service CorporationSouth Dakota
The Clark Fork and Blackfoot, L.L.C.Montana
NorthWestern Services, LLCDelaware
Canadian-Montana Pipe Line CorporationCanada
Risk Partners Assurance, Ltd.Bermuda
Lodge Creek Pipelines, LLCNevada
Willow Creek Gathering, LLCNevada
Havre Pipeline Company, LLCTexas
NorthWestern Energy Solutions, Inc.Delaware
NorthWestern Great Falls Gas LLCMontana
NorthWestern Cut Bank Gas LCCMontana
Colstrip Property Holdings LLCMontana
NorthWestern Colstrip 222Av LLCMontana
NorthWestern Colstrip 370Pu LLCMontana


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