Northrop Grumman is an aerospace and defense company. It makes military aircraft, weapons, space systems and defense electronics, and sells them principally to the U.S. Department of War and the intelligence community, as well as to international customers. Sales to the U.S. government accounted for 84 percent of its sales in 2025. Most of its business comes from long-term government contracts for development, production and support. Some pay back its allowable costs plus a fee; others are fixed-price, which carry more risk if costs grow but can earn higher margins.
It reports four segments. Aeronautics Systems builds and maintains military aircraft, including the B-21 Raider long-range strike aircraft for the U.S. Air Force. Defense Systems makes strategic missiles, tactical weapons, ammunition and rocket motors, and works on Sentinel, the program to modernize the intercontinental ballistic missile system. Mission Systems makes radar, sensors, electronic warfare and communications systems. Space Systems makes satellites, missile defense systems and interceptors, and launch vehicles. Part of its work is on classified programs it calls restricted; for Space Systems, approximately 45 percent of the business.
Northrop Grumman names Boeing, General Dynamics, L3Harris, Lockheed Martin and RTX among its competitors, along with, increasingly, new entrants and startups. It notes that work on major defense programs is often shared, so a rival on one contract can be a supplier or customer on another. Its backlog, the work remaining on its contracts, was $95.7 billion at December 31, 2025, when it had approximately 95,000 employees.