American Tower is an American operator of wireless communication equipment. The company has more than 170,000 transmission systems for data transmission and communication, mostly masts, in 17 countries worldwide.
As of January 2026 American Tower has a market cap of ยฃ64.25 Billion. This makes American Tower the world's 260th 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 18th, 2026 the market cap of American Tower was reported to be: