Notice of Results

Notice of First Quarter 2016 results

Inmarsat plc will report Results for the 3 months ended 31 March 2016 on Thursday 5  May at 07.00 hrs GMT (London time).

Inmarsat management will host a conference call on Thursday 5 May to discuss the results at 08.30 hours London time.

To access the conference call please dial +44 20 3427 1919. The access code for the call is 9249902. The call will also be web-cast (listen only) at www.inmarsat.com

For further information, please contact:

Inmarsat plc

Morten Singleton

Interim Head of Investor Relations

Tel: +44 (0)20 7728 1518

[email protected]

Andi Marcz

EA to Investor Relations

Tel: +44 (0)20 7728 1206

[email protected]