Get Stock Quote Here Northrop Grumman Corporation is an American global aerospace and defense technology company formed by Northrop's 1994 purchase of Grumman. The company was the fifth-largest defense contractor in the world as of 2015. Northrop Grumman employs over 68,000 people worldwide. It reported revenues of $25.218 billion in 2012. Northrop Grumman ranks No. 72 on the 2011 Fortune 500 list of America's largest corporations and ranks in the top ten military-friendly employers. It is headquartered in West Falls Church, Virginia.