Notice of Results

Date for release of preliminary full year 2012 results

Inmarsat plc announces that it will report consolidated preliminary full year 2012 results on 7 March 2013. Inmarsat management will host a presentation of the results on Thursday, 7 March at Inmarsat's offices, 99 City Road, London EC1Y 1AX. The presentation will begin at 9:30am London time, (EST 4:30am). A live webcast of the presentation will also be available through our website.

To register to attend the results presentation please contact Angela Gunnis at Inmarsat on +44 (0)20 7728 1206, or [email protected].

Inmarsat management will also host a results conference call at 2:00pm London time, (EST 9:00am) on Thursday, 7 March. To access the call please dial +44 (0)20 7136 2050 and quote conference id 3524695. The call will also be available via a live webcast accessible through our website. A replay of the call will be available for one week after the event. To access the recording please dial +44 (0)20 3427 0598 and enter access code 3524695.