CARSON, Calif. – Sept. 14, 2011 – Northrop Grumman Corporation (NYSE:NOC) has signed a three-year agreement with Inmarsat Global Limited, London, to become a leased services provider and network services distribution partner of Inmarsat Commercial Satellite Services around the world.

Under the agreement, signed Aug. 17, Northrop Grumman will distribute Inmarsat's Broadband Global Area Network and offer standard Inmarsat products and services and customized power and bandwidth worldwide.

Northrop Grumman said the agreement will contribute to lower-cost satellite airtime and services; strengthen its national and international defense and government customer base; and contribute to maintaining satellite communications as a key component of the company's integrated capabilities.

"The utilization of commercial satellite communications has long been a standard component of Northrop Grumman's Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance or C4ISR offerings to U.S. and international customers. Our relationship with Inmarsat creates a synergistic opportunity for both companies, as these offerings continue to develop around the globe," said Dan Verwiel, director of the battle management systems business in Northrop Grumman's Information Systems sector.

Inmarsat plc (LSE:ISAT) is the leading provider of global mobile satellite communications services. Since 1979, Inmarsat has been providing reliable voice and high-speed data communications to governments, enterprises and other organizations, with a range of services that can be used on land, at sea or in the air. The company's services are delivered through a global network of more than 400 distribution partners and service providers operating in 100 countries. For the year ended 31 December 2010, Inmarsat plc had total revenue of US$1,171.6 million (2009: US$1,038.1 million) with an EBITDA of US$696.1 million (2009: US$594.2 million). For more information, please visit www.inmarsat.com .

Northrop Grumman is a leading global security company providing innovative systems, products and solutions in aerospace, electronics, information systems, and technical services to government and commercial customers worldwide. Please visit www.northropgrumman.com for more information.

  CONTACT: Janis Lamar
         (703) 556-1650
         janis.lamar@ngc.com

         Ken Beedle
         +44 (0) 207 747 1910
         +44 (0) 7787 174092
         Ken.beedle@euro.ngc.com
         
         Ed Pizii
         Inmarsat
         (44) 07595073181
         ed_pizii@inmarsat.com