AMX vs AMT Comparison

América Móvil is the largest telecom carrier in Latin America, serving about 335 million wireless customers across the region. It also provides fixed-line phone, internet access, and television services in most of the countries it serves. Mexico is the firm's largest market, providing about 35% of service revenue. Móvil dominates the Mexican wireless market with about 60% customer share and also serves about half of the country's fixed-line internet access customers. Brazil, its second-most important market, accounts for about 20% of service revenue. Móvil sold its low-margin wireless resale business in the US to Verizon in 2021 and now owns a 1.4% stake in the US telecom giant. The firm also holds a 61% stake in Telekom Austria.

American Tower owns and operates about 150,000 wireless towers throughout the US, Asia, Latin America, Europe, and Africa. It also owns and/or operates 30 data centers in 11 US markets through its CoreSite segment. The company's customer base in the tower business is very concentrated, with most revenue in each market generated by the top three or four mobile carriers. The company operates 42,000 towers in the US, which accounted for about half of total revenue in 2025. Outside the US, American Tower operates about 47,000 towers in Latin America (dominated by Brazil), 33,000 towers in Europe, and 28,000 towers in Africa. American Tower operates as a REIT.