Leidos Holdings, Inc. operates as a leading technology, engineering, and science company that provides services and solutions in the defense, intelligence, civil, and health markets. The company's business model is heavily focused on government contracting, with the vast majority of its revenue—typically over 85%—derived from the U.S. government, including the Department of Defense, the Department of Homeland Security, and the Intelligence Community.
Leidos organizes its operations into several key segments. The National Security & Digital segment is the largest, contributing approximately 44% of total revenues in fiscal 2025, and provides technology-enabled services, cybersecurity, logistics, and mission software capabilities. The Health & Civil segment accounts for roughly 30% of revenues, offering public health solutions, care coordination, IT modernization, and life sciences research for agencies like the Department of Veterans Affairs. The remaining revenue is generated by its Commercial & International and Defense Systems segments, which provide IT modernization, power grid engineering, and command and control (C4ISR) technologies.
Geographically, Leidos is highly concentrated in the United States, though it maintains a growing international presence, particularly in the United Kingdom and Australia. The company's competitive position is bolstered by its massive scale, deep integration into critical government infrastructure, and specialized expertise in areas like digital modernization, artificial intelligence, and mission software. Originally founded as Science Applications Incorporated (SAIC) in 1969, the company assumed the Leidos name following a 2013 spin-off of its government services business and significantly expanded its scale through a 2016 merger with Lockheed Martin's Information Systems & Global Solutions business.
