Aerojet Completes Design Verification Testing on First MR-104G Engine for NASAs Orion Spacecraft

SACRAMENTO, Calif., Nov. 22, 2011 – Aerojet, a GenCorp (NYSE: GY) company, in conjunction with Lockheed Martin and NASA, has successfully completed vibration, shock and hot fire design verification testing on its first MR-104G monopropellant rocket engine planned for use on NASA’s Orion spacecraft.

Aerojet Selected to Complete Throttling Divert and Attitude Control System Development for the SM-3 Block IIA Missile

SACRAMENTO, Calif., Nov. 21, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced today that it has been competitively selected by Raytheon Missile Systems to complete the development of the Throttling Divert and Attitude Control System (TDACS) for the Standard Missile-3 (SM-3) Block IIA program, an advanced version of the SM-3 now in development.

Aerojet Named NASA Glenn Research Center Large Business Prime Contractor of the Year

SACRAMENTO, Calif., Nov. 4, 2011 – Aerojet, a GenCorp (NYSE: GY) company, was named NASA Glenn Research Center’s Large Business Prime Contractor of the Year for its commitment to small business advancement during a five-year effort to create liquid methane propulsion engines.

Aerojet AJ10 Engine Boosts NASA National Polar-Orbiting Environmental Satellite System Preparatory Project to Orbit

SACRAMENTO, Calif., Oct. 28, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced that its AJ10 engine successfully powered the second stage of today’s United Launch Alliance (ULA) Delta II launch carrying the National Polar-Orbiting Environmental Satellite System Preparatory Project (NPP) for NASA.

John Luddy Named Vice President of the Aerojet Washington, D.C. Office

SACRAMENTO, Calif., Oct. 24, 2011 – Aerojet, a GenCorp (NYSE:GY) company, announced today that John Luddy has joined Aerojet to head the Washington, D.C. office.