Description Rocketeers can thanks GenCorp for enabling them to go higher and faster into sky and space. Through its principal operating subsidiary Aerojet-General, the company is one of the largest manufacturers and suppliers of propulsion systems for defense and space applications in the US. These systems are used in missiles, maneuvering systems, launch vehicles, spacecraft, and satellites. A whopping 99% of its revenues come from this aerospace and defense segment. GenCorp also has a much smaller business segment that deals in real estate. Subsidiary Easton Development Company oversees the entitlement, sale, and leasing of the company's excess real estate assets.