Aerojet Rocketdyne Supports ULA Launch and Operation of Global Positioning System Satellite

SACRAMENTO, Calif., March 25, 2015 – Aerojet Rocketdyne, a GenCorp (NYSE: GY) company, helped successfully propel another in the series of Global Positioning System (GPS) IIF military navigation satellites into orbit today. The latest mission was launched from Cape Canaveral Air Force Station in Florida aboard a United Launch Alliance (ULA) Delta IV rocket.

European Space Propulsion Receives European Space Agency Contract for Qualification of 5-Kilowatt Hall Thruster

BELFAST, Northern Ireland, March 17, 2015 – European Space Propulsion (ESP), a subsidiary of Aerojet Rocketdyne, a GenCorp (NYSE: GY) company, was awarded a contract valued at approximately €11 million from the European Space Agency (ESA) for the flight qualification of the 5-kilowatt XR-5E Hall Thruster.

Aerojet Rocketdyne Hot-Fire Tests Additive Manufactured Components for the AR1 Engine to Maintain 2019 Delivery

SACRAMENTO, Calif., March 16, 2015 – Aerojet Rocketdyne, a GenCorp (NYSE:GY) company, has recently completed a successful series of hot-fire tests of key additively manufactured components for its AR1 booster engine at its Sacramento test facility.

Aerojet Rocketdyne Propulsion Supported ULA Launch of NASA Magnetospheric Multiscale Mission into Orbit

SACRAMENTO, Calif., March 12, 2015 – Aerojet Rocketdyne, a GenCorp (NYSE: GY) company, played a major role in successfully placing NASA’s Magnetospheric Multiscale (MMS) mission into orbit. The unprecedented mission was launched from Cape Canaveral Air Force Station in Florida aboard a United Launch Alliance (ULA) Atlas V rocket.

European Space Propulsion Receives Contract for 5 Kilowatt Hall Thruster ThermoThrottle Development

BELFAST, Northern Ireland, March 12, 2015 – European Space Propulsion (ESP), a subsidiary of Aerojet Rocketdyne, a GenCorp (NYSE: GY) company, recently received a contract from Airbus Space and Defence and Thales Alenia Space for the development of a new ThermoThrottle to provide variable Xenon Flow Control (XFC) for the ESP XR-5E Hall Thruster, the European version of Aerojet Rocketdyne’s Zero