NorthWestern Energy to Host Second Quarter 2026 Financial Results Webinar

BUTTE, MT / SIOUX FALLS, SD: July 1, 2026 - NorthWestern Energy Group, Inc. d/b/a NorthWestern Energy (Nasdaq: NWE) today announced that it will host an investor webinar on Thursday, July 30, 2026, at 3:30 p.m. Eastern to review its financial results for the quarter ending June 30, 2026. The Company also plans to issue a news release detailing its financial results the evening of Wednesday, July 29, 2026.

To register for the webinar, please visit https://northwesternenergy.com/earnings-registration. Registration is recommended at least 10 minutes in advance of the event, and an archived replay will be available following the event.

NorthWestern Energy - Delivering a Bright Future

NorthWestern Energy provides essential energy infrastructure and valuable services that enrich lives and empower communities while serving as long-term partners to our customers and communities. We work to deliver safe, reliable, and innovative energy solutions that create value for customers, communities, employees, and investors. We do this by providing low-cost and reliable service performed by highly-adaptable and skilled employees. We provide electricity and / or natural gas to approximately 850,300 customers in Montana, South Dakota, Nebraska, and Yellowstone National Park. Our operations in Montana and Yellowstone National Park are conducted through our subsidiary, NorthWestern Corporation, and our operations in South Dakota and Nebraska are conducted through our subsidiary, NorthWestern Energy Public Service Corporation. We have provided service in South Dakota and Nebraska since 1923 and in Montana since 2002.

Investor Relations Contact:

Travis Meyer

605-978-2967

[email protected]

Media Contact

Jo Dee Black

866-622-8081

[email protected]