NorthWestern Energy Group, Inc.

NorthWestern Energy Group, Inc. operates as a vertically integrated utility company providing essential energy infrastructure and services across the northern United States. The company does business as NorthWestern Energy and maintains its primary web presence at www.northwesternenergy.com. As an accelerated filer with the Securities and Exchange Commission, NorthWestern Energy trades on the NASDAQ under ticker symbol NWE.

The company serves approximately 850,300 customers across Montana, South Dakota, Nebraska, and Yellowstone National Park through two primary operating subsidiaries: NorthWestern Corporation, which handles Montana operations and Yellowstone National Park service, and NorthWestern Energy Public Service Corporation, which manages South Dakota and Nebraska operations. The business operates in two reportable segments: electric utility operations encompassing generation, purchase, transmission and distribution of electricity, and natural gas utility operations including production, purchase, transmission, storage, and distribution of natural gas.

NorthWestern's electric operations span approximately 107,600 square miles in Montana, serving roughly 440,700 customers, while South Dakota electric operations serve over 65,600 customers across 25 counties. The company's natural gas operations extend to approximately 249,400 customers in Montana, 51,200 customers in South Dakota, and 43,400 customers in Nebraska. The customer base comprises residential, commercial, and industrial segments, with Montana electric revenue split approximately 46 percent residential, 46 percent commercial, and 8 percent other, while South Dakota electric revenue reflects 39 percent residential and 59 percent commercial.

The company operates an extensive infrastructure including 6,596 miles of electric transmission lines in Montana, 1,344 miles in South Dakota, and approximately 7,900 miles of natural gas distribution pipelines across its service territories. NorthWestern owns and operates multiple generation facilities including hydroelectric plants, coal-fired stations, and natural gas facilities, with owned generation resources representing approximately 67 percent of retail load in 2025. The company committed to achieving Net-Zero carbon emissions by 2050 for Scope 1 and Scope 2 emissions, with approximately 52 percent of its electric portfolio from carbon-free sources in 2025. In August 2025, NorthWestern entered into a merger agreement with Black Hills Corporation, with the combined entity to operate under the name Bright Horizon Energy Corporation.