Total revenue $323.9m up 15% (2010: $281.5m)

Phase 2 of LightSquared Cooperation Agreement implemented

Acquisition of Ship Equip announced and completed

Inmarsat Group Limited - Q1 Highlights

Inmarsat Global revenue $222.8m up 21% (2010: $183.6m)

Total EBITDA $204.1m up 23% (2010: $165.7m)

Profit before tax $124.8m up 51% (2010: $82.6m)

Free Cash Flow $186.6m up 71% (2010: $109.1m)

Andrew Sukawaty, Inmarsat's Chairman and Chief Executive Officer, said, "During the quarter we saw strong overall revenue growth resulting from our Cooperation Agreement with LightSquared including the first revenues from Phase 2 of the agreement. The revenue performance of our core MSS business was in line with management expectations. New product sales continue to be very strong, but some usage trends and other factors continue to constrain our MSS growth. We continue to expect growth in our core MSS revenue for 2011 to be within our 2% to 4% range."

Inmarsat plc (London: ISAT)