AMT vs SNY Comparison

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 after acquiring CoreSite. 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 more than 40,000 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.

Sanofi develops and markets drugs with a concentration in immunology, vaccines, and rare diseases. Although the company offers a diverse array of drugs, its highest revenue generator, Dupixent, accounts for approximately 30% of total sales. Profits for this immunology blockbuster drug are shared with Regeneron. About 45% of total revenue comes from the United States, 20% from Europe, and 6% from China.