As of February 2026 NorthWestern Corporation has a market cap of C$5.81 Billion. This makes NorthWestern Corporation the world's 3440th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Feb 3rd, 2026 the market cap of NorthWestern Corporation was reported to be: