As of October 2026 Quanta Services has a market cap of โน9.795 Trillion. This makes Quanta Services the world's 220th 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 Oct 2nd, 2026 the market cap of Quanta Services was reported to be: