Notice of Results

Inmarsat plc will issue an interim management statement and Inmarsat Group Limited will release consolidated financial results for the first quarter ended 31 March 2013 on Thursday 2 May at 7:00am BST (London time).

Inmarsat management will discuss the first quarter results and other financial and business information in a conference call on: Thursday 2 May 2013 at 8:30am BST (London time).

To access the call please dial +44(0)20 7136 2054. The conference id for the call is 4409797. The call will be recorded and available for one week after the event. To access the recording, please dial +44 (0)20 3427 0598 and enter the access code 4409797#.

The call will also be available via a webcast accessible through our website:

http://www.inmarsat.com/corporate/investors/inmarsat-results/index.htm

Enquiries:

Rebecca Blakemore

Tel: +44 (0)20 7728 1206

[email protected]