As the world's largest defense contractor, Lockheed Martin researches, designs, manufactures, operates, and sustains advanced technology systems, products, and services. Through
four principal business segments – Aeronautics, Missiles and Fire Control, Rotary and Mission Systems, and Space Systems – the company serves customers in domestic and international
defense and civil markets, with its principal customers being agencies of the U.S. government.
Sikorsky Aircraft Corporation's business area encompasses military and commercial helicopters; fixed-wing reconnaissance aircraft; spare parts; maintenance, repair and overhaul (MRO)
services for helicopters and fixed-wing aircraft; and civil helicopter operations.
Reports on this and additional companies are contained in our Defense & Aerospace Companies Series,
Volume I and
Volume I covers over 50 U.S. and Canadian primes and their subsidiaries. Volume II covers over 60 top companies in Europe, Asia, and the rest of the world.