As of January 2026 MasTec has a market cap of โน1.688 Trillion. This makes MasTec the world's 1220th 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 14th, 2026 the market cap of MasTec was reported to be: