Lockheed Martin (NYSE: LMT) is a multinational aerospace manufacturer, global security and advanced technology company formed in 1995 by the merger of Lockheed with Martin Marietta. It is headquartered in Bethesda, Maryland, in the Washington Metropolitan Area. Lockheed Martin employs 146,000 people worldwide. Robert J. Stevens is the current Chairman, President, and Chief Executive Officer.

Lockheed Martin is the world's largest defense contractor by revenue. As of 2005, 95% of Lockheed Martin's revenues came from the United States Department of Defense, other U.S. federal government agencies, and foreign military customers.

A team led by prime contractor Lockheed Martin won the 2006 Collier Trophy for the development of the F-22 Raptor fighter jet.