Cintra, S.A. (Concesiones de Infraestructuras de Transporte) is one of the largest private developers of transport infrastructure in the world. Its assets are fundamentally toll roads and car parks, in which it has a total investment of €16billion. Formerly traded on the Madrid Stock Exchange and part of the Spanish benchmark IBEX 35 stock index, Cintra was reacquired by its former owner Ferrovial in December 2009.