As of June 2026 NiSource has a market cap of NZ$40.45 Billion. This makes NiSource the world's 1057th 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 29th, 2026 the market cap of NiSource was reported to be: