Inmarsat Regulatory News (ISAT)

Notice of Third Quarter 2016 results

Inmarsat plc will report Results for the 3 months ended 30 September 2016 on Thursday 3 November at 07.00 hours GMT (London time).

 Inmarsat management will host a conference call on Thursday 3 November to discuss the results at 08.30 hours London time. The call will also be web-cast at www.inmarsat.com.

 To access the conference call please dial +44 20 3427 1901 (US: +1 646 254 3366). The conference ID for the call is 7523628.

For further information, please contact:

Inmarsat plc

Morten Singleton

Interim Head of Investor Relations

Tel: +44 (0)20 7728 1518

Morten.singleton@inmarsat.com

Andi Marcz

EA to Investor Relations

Tel: +44 (0)20 7728 1206

Andi.marcz@inmarsat.com