As of March 2026 NorthWestern Energy has a market cap of โฌ3.47 Billion. This makes NorthWestern Energy the world's 3431th 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 Mar 25th, 2026 the market cap of NorthWestern Energy was reported to be: