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 December 2025 American Tower has a market cap of C$116.83 Billion. This makes American Tower the world's 258th 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 4th, 2025 the market cap of American Tower was reported to be: