L3Harris makes defense technology: secure radios and communications networks, sensors, space systems, and rocket and missile propulsion. Its largest customers are U.S. Government departments and agencies, the prime contractors (main contractors) that work for them, and allied governments, and it serves customers in more than 100 countries. Sales to U.S. Government customers, including foreign military sales the U.S. Government funds, made up 75% of fiscal 2025 revenue. Revenue from customers outside the U.S., counting those same foreign military sales, was $4.8 billion, or 22%.
In fiscal 2025 it reported four segments. Communication Systems makes tactical radios, night vision goggles, and radios for first responders and other public agencies. Integrated Mission Systems builds surveillance and targeting systems for aircraft, and power, sensor and autonomous systems for navy vessels. Space & Airborne Systems makes space systems for surveillance, navigation and weather monitoring, air traffic management networks, and electronics and weapons for combat aircraft. Aerojet Rocketdyne makes propulsion and armament systems for missiles and space missions. L3Harris names BAE Systems, Boeing, General Dynamics, Lockheed Martin, Northrop Grumman, RTX and Thales as competitors, along with newer defense contractors such as Anduril.
L3Harris had about 45,000 employees as of January 2, 2026, including about 18,000 engineers and scientists, with 90% in the U.S. Its contractual backlog, work under contract still to be done, was $38.7 billion. It divested its Commercial Aviation Solutions business in March 2025, and starting in fiscal 2026 it reorganized into three segments.