As of June 2026 NiSource has a market cap of โน2.163 Trillion. This makes NiSource the world's 1045th 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 Jun 25th, 2026 the market cap of NiSource was reported to be: