 BUTTE, Mont. and SIOUX FALLS, S.D., July 09, 2021 GLOBE NEWSWIRE -- NorthWestern Corporation dba NorthWestern Energy Nasdaq: NWE today announced that it will host an investor conference call and webinar on Wednesday, July 28, 2021, at 2:30 p.m. Eastern Daylight Time to review its financial results for the quarter ending June 30, 2021. The Company also plans to issue a news release detailing its second quarter financial results the evening of July 27, 2021, after stock market close. 