Inmarsat Regulatory News (ISAT)

20 March 2017

These notifications are made in accordance with DR 3.1.4.R.

Vesting of shares under the 2014 Performance Share Plan (PSP)

Awards over ordinary shares of €0.0005 in Inmarsat plc under the Performance Share Plan made in March 2014 vested on 19 March 2017.

Vesting of the award was dependent on 3-year TSR vs the FTSE350 (excluding Investment Trusts) and 3-year EBITDA growth, measured over the three years to 31 December 2016 and weighed equally. A vesting outcome of 30% of the element for TSR (or 15% out of 100% of the total award) and 66% of EBITDA (or 33% out of the total award) vesting occurred and therefore 48% of the total award vested.

Mr Sukawaty received his share award when he held an executive position in the Company and the number of shares that vested was subject to a time pro rata reduction.

The PSP is not a HM Revenue & Customs approved plan and on vesting, income tax and social security deductions become payable by the individual.

The share price at which shares were sold on 20 March 2017 was £7.9206 per share. Where shares have been retained they will be added to the existing number of ordinary shares for the relevant individual.