AMT vs AJG Comparison

American Tower owns and operates more than 220,000 cell towers throughout the us, Asia, Latin America, Europe, and Africa. It also owns and/or operates 28 data centers in 10 us markets after acquiring CoreSite. On its towers, the company has a very concentrated customer base, with most revenue in each market being generated by just the top few mobile carriers. The company operates more than 40,000 towers in the us, which accounted for almost half of the company's total revenue in 2023. Outside the us, American Tower operates over 75,000 towers in India, almost 50,000 towers in Latin America (dominated by Brazil), 30,000 towers in Europe, and nearly 25,000 towers in Africa. American Tower operates as an REIT.

Arthur J. Gallagher & Co provides insurance brokerage and consulting services to middle-market entities around the world. The majority of the company's revenue comes from its brokerage segment, where it negotiates and places its customers with insurance companies that provide, among other types, property/casualty and health insurance. The company's primary source of revenue in the brokerage segment is commissioning from the insurance companies. The company also generates significant revenue in its corporate segment, which includes clean energy investment and other investment income. The company generates most of its revenue in the United States, with the remaining revenue coming primarily from Australia, Bermuda, Canada, the Caribbean, New Zealand, and the United Kingdom.