As of July 2026 ONE Gas has a market cap of NZ$8.53 Billion. This makes ONE Gas the world's 3231th 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 30th, 2026 the market cap of ONE Gas was reported to be: