Rheinmetall AG operates as a holding company. The firm engages in the production of automotive components and defense equipment. It operates through the following segments: Defence and Automotive. The Defence segment offers vehicle, infantry equipment, protection and weapon systems, air defense systems, function sequence networking as well as simulation hardware and software. The Automotive segment supplies engine blocks, plain bearings and pistons. The company was founded by Heinrich Ehrhardt on April 13, 1889 and is headquartered in Dusseldorf, Germany.