MDT vs AMT Comparison

One of the largest medical-device companies, Medtronic develops and manufactures therapeutic medical devices for chronic diseases. Its portfolio includes pacemakers, defibrillators, transcatheter heart valves, stents, spinal fixation devices, neurovascular products, advanced energy, ablation laser therapy, and surgical tools. The company primarily markets its products to healthcare institutions and physicians in the United States, Western Europe, and Japan. Foreign sales account for roughly 50% of the company's total sales.

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.