NOC vs AMT Comparison

Northrop Grumman is a diversified defense contractor providing aeronautics, defense, and space systems. The company's aerospace segment produces autonomous and piloted aircraft such as Global Hawk drones and the new B-21 bomber, creates the fuselage for the massive F-35 program, and maintains and upgrades numerous other military aircraft. Defense systems makes artillery and missile ammunition and guidance systems, long-range missiles, and missile defense systems. Mission systems creates and integrates a variety of radar, navigation, and communication systems for avionics, weapons control, and countermeasures on a range of platforms from helicopters to destroyers. Space systems produces satellites, sensors, space structures, and rocket motors.

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. On its towers, the company has a very concentrated customer base, with most revenue in each market generated by the top few mobile carriers. The company operates more than 40,000 towers in the US, which accounted for about half of total revenue in 2024. Outside the US, American Tower operates about 47,000 towers in Latin America (dominated by Brazil), 32,000 towers in Europe, and 27,000 towers in Africa. American Tower operates as a REIT.