Inmarsat plc is the leading provider of global mobile satellite communications services. Since 1979, Inmarsat has been providing reliable voice and high-speed data communications to governments, enterprises and other organisations, with a range of services that can be used on land, at sea or in the air. Inmarsat employs around 1,500 staff in more than 40 locations around the world, with a presence in the major ports and centres of commerce on every continent. For the year ended 31st December 2011, Inmarsat plc had total revenue of US$1,409m and an EBITDA of US$854m. For the six months ended 30 June 2012, Inmarsat plc had total revenue of US$684m and an EBITDA of US$381m. Inmarsat is listed on the London Stock Exchange (LSE:ISAT.L).