As of August 2026 NiSource has a market cap of โน1.944 Trillion. This makes NiSource the world's 1192th 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 Aug 13th, 2026 the market cap of NiSource was reported to be: