As of December 2025 Southwest Gas has a market cap of โน512.81 Billion. This makes Southwest Gas the world's 2848th 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 Dec 6th, 2025 the market cap of Southwest Gas was reported to be: