CORRECTION: Corrects the company structures for Vencore Inc. and QinetiQ Group Plc. Vencore purchased QinetiQ North America Inc. in 2014 but many obligations were incorrectly still rolling up to QinetiQ Group. As a result of this update, Vencore enters the list at No. 176 and QinetiQ Group is no longer ranked. Affects the rankings of companies ranked 164 through 176.
Lockheed Martin Corp.
Top markets: Aircraft, Research and development, Weapons and ammunition
Top customers: Air Force, Navy