FALLS CHURCH, Va., Nov. 26, 2013 /PRNewswire/ -- Northrop Grumman Corporation (NYSE: NOC ) has been rated the number one aerospace and defense (A&D) company in the 2013 Gartner Supply Chain Top 25: A&D report. This is the ninth annual Gartner Supply Chain survey, conducted to raise awareness of the supply chain discipline and how it impacts the business, according to Gartner. The rankings are based on company and supply chain financial performance, as well as inputs from supply chain analysts and companies around the world with leading supply chains.