Of the 100 companies on the list, 44 are based in the U.S., including Boeing, Northrop Grumman and Lockheed Martin. The American companies account for more than 60% of arms sales revenue of the 100 manufacturers. Seven of SIPRI’s top 10 are American, one is British, one is Italian and one is a multinational EU conglomerate. The U.S. federal government has contract deals with all seven American companies. These seven are among the top 10 U.S. federal contractors by amount procured, according to the government’s Federal Procurement DataSystem.