American Tower trades on the New York Stock Exchange under the ticker AMT. Indeed, American Tower owns 40.6k towers in the United States, which represents 23% of the company’s total, of 179k towers globally. The company operates in 20 different countries around the world. Specifically, American Tower’s six largest markets by number of towers are the United States, India, Brazil, Mexico, Colombia, and Nigeria. American Tower’s three largest tenants are AT&T (19% of revenues), T-Mobile (18% of revenues), and Verizon (14% of revenues).