Spanish companies invested in fields like renewable energy commercialisation (Iberdrola was the world's largest renewable energy operator), technology companies like Telefónica, Abengoa, Mondragon Corporation (which is the world's largest worker-owned cooperative), Movistar, Hisdesat, Indra, train manufacturers like CAF, Talgo, global corporations such as the textile company Inditex, petroleum companies like Repsol or Cepsa and infrastructure, with six of the ten biggest international construction firms specialising in transport being Spanish, like Ferrovial, Acciona, ACS, OHL and FCC.