As of May 2026 NorthWestern Energy has a market cap of S$5.67 Billion. This makes NorthWestern Energy the world's 3352th 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 May 2nd, 2026 the market cap of NorthWestern Energy was reported to be: