As of January 2026 Southwest Gas has a market cap of โฌ4.99 Billion. This makes Southwest Gas the world's 2859th 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 Jan 6th, 2026 the market cap of Southwest Gas was reported to be: