9.3.2013 From 24/7 Wall St.: The business of war is profitable. In 2011, the 100 largest contractors sold $410 billion in arms and military services. Just 10 of those companies sold over $208 billion. Based on a list of the top 100 arms-producing and military services companies in 2011 compiled by the Stockholm International Peace Research Institute, 24/7 Wall St. reviewed the 10 companies with the most military sales worldwide in 2011.