 BUTTE, Mont. and SIOUX FALLS, S.D., Oct. 04, 2021 GLOBE NEWSWIRE -- NorthWestern Corporation dba NorthWestern Energy Nasdaq: NWE today announced that it will host an investor conference call and webinar on Monday, October 25, 2021, at 3:30 p.m. Eastern to review its financial results for the quarter ending September 30, 2021. The Company also plans to issue a news release detailing its second quarter financial results the evening of October 24, 2021. 