Inmarsat Plc operates as a provider of global mobile satellite communications solutions. It offers portfolio of solutions and value-added services for use on land, at sea and in the air. It operates through two segments: Inmarsat Global and Inmarsat Solutions. The Inmarsat Global segment engages in selling wholesale L-band satellite communications airtime to distribution partners, who then on-sell services to service providers and end-users. The Inmarsat Solutions segment operates direct and indirect distribution business, which offers a wide portfolio of remote telecommunications solutions to service providers and end-users, including L-band services. The company was founded on July 16, 1979 and is headquartered in London, the United Kingdom.