Crown Castle trades on the New York Stock Exchange under the ticker CCI. Indeed, Crown Castle owns 40.1k towers in the United States, which represents 100% of the company’s total. To clarify, this is because Crown Castle does not operate cellular towers internationally. The company only operates in the United States. Furthermore, Crown Castle has publicly-stated that it is currently not interested in expanding internationally. Crown Castle’s three largest tenants are T-Mobile (35% of revenues), AT&T (22% of revenues), and Verizon (18% of revenues).