NorthWestern Corporation is a publicly traded utility holding company that provides electric, natural gas and water services across parts of the northern Great Plains. Operating through its wholly owned subsidiary NorthWestern Energy, the company serves customers in Montana, South Dakota, Nebraska and portions of Iowa. Its principal business activities encompass the generation, transmission and distribution of electricity, natural gas distribution and water service provision within regulated utility frameworks.
The company’s electric operations include a diversified mix of generation assets, such as hydroelectric, coal-fired and natural gas facilities, supported by long-term power purchase agreements. NorthWestern’s natural gas network delivers reliable service through an extensive pipeline infrastructure, while its water segment offers potable water treatment and distribution to urban communities. Under oversight from state public service commissions, the company prioritizes system reliability, safety and regulatory compliance.
NorthWestern’s origins date back to early 20th-century regional power providers in South Dakota and Montana. It was reorganized in the 1990s to consolidate its regulated utility businesses under a unified corporate structure. Since then, the company has focused on infrastructure investments, including grid modernization, renewable energy integration and resilience enhancements to meet evolving customer and environmental needs.
Headquartered in Sioux Falls, South Dakota, NorthWestern Corporation is led by President and CEO David S. Goodin and a seasoned executive team. The company continues to advance strategic initiatives that bolster sustainability, enhance customer service and support economic growth in the communities it serves.
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