Northrop Grumman Corp.

Lockheed Martin Corp. operates as a global security and aerospace company, which engages in the research, design, development, manufacture, integration, and sustainment of technology systems, products, and services. It operates through the following business segments: Aeronautics, Missiles and Fire Control (MFC), Rotary and Mission Systems (RMS) and Space. The Aeronautics segment researches, designs, develops, manufactures, integrates, sustains, supports, and upgrades advanced military aircraft, including combat and air mobility aircraft, unmanned air vehicles, and related technologies. The MFC segment provides air and missile defence systems; tactical missiles and air-to-ground precision strike weapon systems; logistics; fire control systems; mission operations support, readiness, engineering support and integration services; manned and unmanned ground vehicles; and energy management solutions. The RMS segment offers design, manufacture, service, and support for a variety of military and commercial helicopters; ship and submarine mission and combat systems; mission systems and sensors for rotary and fixed-wing aircraft; sea and land-based missile defence systems; radar systems; the Littoral Combat Ship; simulation and training services; and unmanned systems and technologies. The Space segment comprises of the research and development, design, engineering and production of satellites, strategic, and defensive missile systems and space transportation systems. The company was founded in 1961 and is headquartered in Bethesda, MD.

General Dynamics is a market leader in business aviation; combat vehicles, weapons systems and munitions; shipbuilding and marine systems; and mission-critical information systems and technology. The company was formed in 1952 through the combination of the Electric Boat Company, Consolidated Vultee (CONVAIR) and several others. The company grew organically and through acquisitions until the early 1990s, when they sold many of our defense-related businesses. Starting in the mid-1990s, they began expanding by acquiring combat vehicle-related businesses, additional shipyards, information-technology product and service companies and Gulfstream Aerospace Corporation.

Leidos Holdings, Inc. is a holding company, which engages in the provision of scientific, engineering and information technology services and solutions in the areas of defense, intelligence, civil and health markets. It operates through the following three segments: Defense Solutions, Civil, and Health. The Defense Solutions segment focuses on deploying agile, cost-effective solutions to meet the ever-changing missions of the company's customers in areas of intelligence surveillance and reconnaissance, enterprise IT and integrated systems and cybersecurity and global services. The Civil segment focuses on seamlessly integrating and protecting physical, digital and data domains. The Health segment offers solutions to federal and commercial customers that are responsible for the health and wellbeing of people worldwide including service members and veterans. The company was founded by John Robert Beyster on February 3, 1969 and is headquartered in Reston, VA.