Inmarsat plc: Notification of Transactions of Directors, Persons Discharging Managerial Responsibility or Connected Persons

LONDON, August 5, 2011 -

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

Inmarsat plc (LSE: ISAT.L) 5 August 2011:

The Company has been advised of the following purchases of ordinary shares on 5 August 2011:

Andrew Sukawaty (Director): purchase of 248,435 shares at 400p; total shareholding now of 731,915 ordinary shares

Rick Medlock (Director) - spouse purchase: purchase of 49,686 shares at 400p; total beneficial interest in 289,686 ordinary shares

Rupert Pearce (Director): purchase of 248,435 shares of 400p; total shareholding now of 550,837 ordinary shares

Janice Obuchowski (Director): purchase of 5,000 shares of 400p; total shareholding now 7,000 ordinary shares

John Rennocks (Director) and spouse purchase: purchase of 11,500 shares at 396p; total beneficial interest now 44,900 ordinary shares

Eugene Jilg (PDMR): purchase of 61,954 shares of 400p; total shareholding now 305,341 ordinary shares

Alison Horrocks (PDMR): purchase of 24,843 shares of 400p; total beneficial interest 213,944 ordinary shares

Chris McLaughlin, +44(0)7796276033, christopher_mclaughlin at inmarsat.com; John Warehand, +44(0)2077281579, john_warehand at inmarsat.com