As of May 2026 ONE Gas has a market cap of NZ$8.85 Billion. This makes ONE Gas the world's 3075th 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 20th, 2026 the market cap of ONE Gas was reported to be: