Adjustment of Conversion price

Inmarsat plc

Adjustment to the Conversion Price of the Inmarsat plc

$287,700,000 1.75% Convertible Bonds due 2017 (the "Notes", ISIN = XS0331843523)

Adjustment Event

On 3rd August 2012 Inmarsat plc announced that on 25th October 2012 it would pay an interim cash Dividend of 16.94 cents (US$) per Ordinary Share to Shareholders on the register of members on the record date of 5th October 2012.

Adjustment of Conversion Price for $287,700,000 1.75% Convertible Bonds due 2017

As a result of the announcement by Inmarsat plc that it will pay this cash Dividend, an adjustment to the Conversion Price is required pursuant to Conditions 5 (b) (iii) of the Terms and Conditions of the Notes.

The Conversion Price and Conversion Ratio will be adjusted with effect from 25th October 2012 as set out below.

Conversion Price Conversion Ratio

Current $12.490 Current 8,006

 Old $12.694 Old 7,878

All words and terms that are capitalised here in shall have the same meaning as set out in the Terms and Conditions of the Notes.

Contact; George Sawtell (Deputy Treasurer)

0207 728 1442/[email protected]