
With a market cap of $81.1 billion, American Tower Corporation (AMT) is a leading global real estate investment trust (REIT) that owns, operates, and leases wireless and broadcast communications infrastructure, primarily cell towers and related sites. The Boston, Massachusetts-based company’s core business is providing space on its towers to mobile network operators, enabling companies like telecom carriers to deploy and expand their wireless networks without building their own infrastructure. AMT operates in more than 20 countries across North America, Latin America, Europe, Africa, and Asia, giving it highly diversified revenue streams.
Shares of the company have lagged behind the broader market over the past 52 weeks. AMT stock has dropped 4.1% over this time frame, while the broader S&P 500 Index ($SPX) has risen 14%. However, in 2026, both the stock and the index have gained marginally.