Director/PDMR Shareholding

NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL RESPONSIBILITY OR CONNECTED PERSONS

This notification is required by DR 3.1.4R(1).

Inmarsat plc (LSE: ISAT) 21 May 2010:

The Company has been advised of the following disposal of shares on 21 May 2010 for shares held beneficially by:

Alison Horrocks (PDMR): sold 300,000 at £7.516; retains 1,580

Eugene Jilg (PDMR): sold 500,000 at £7.438; retains 100,987

Debbie Jones (PDMR): sold 100,000 at £7.516; retains 104,229

Rick Medlock (Director) (spouse sale): sold 211,500 at £7.516; retains 248,163

Rupert Pearce (PDMR): sold 900,000 at £7.516; retains 264,604

Andrew Sukawaty (Director): sold 432,000 at £7.516; retains 390,534