Optimus Telecomunicações
 Optimus Telecomunicações S.A. is a Portuguese GSM/UMTS mobile operator. The company was incorporated at the end of 1997 after winning the bid for Portugal's third GSM license. Optimus is a wholly owned subsidiary of Sonaecom (a sub-holding of Portuguese conglomerate Sonae which is the major shareholder with the France Télécom holding company Atlas Services Belgium (ASB) as the largest minority owner).