LightSquared Cooperation Agreement Update

Ligado Networks elects for 30MHz option under Cooperation Agreement

1 April 2016: Inmarsat plc (LSE: ISAT.L), the leading provider of global mobile satellite communications services, today announces that it has received notification from Ligado Networks (formerly known as LightSquared) that it has elected for the 30 MHz option under the Cooperation Agreement between the two companies. Inmarsat and Ligado Networks remain in discussion around the details of the plan and consequent change in payments. Further details will be advised in due course.

Contacts:

Investor Enquiries:

Morten Singleton

Tel: +44 (0)20 7728 1518

[email protected]

Media Enquiries:

Chris McLaughlin/ Jonathan Sinnatt

Tel: +44 (0)20 7728 1015 / +44 (0)20 7728 1935

[email protected] / [email protected]