Enagas is the Technical Manager of the Spanish Gas System and the main carrier of natural gas in Spain. Certified as independent TSO by the European Union, which homologates the company to gas transmission network operators of other European countries. The company's main mission is to ensure competition and security of the Gas System in Spain. It has 11,000 km of pipelines throughout the Spanish territory, 3 underground storage facilities located in Serrablo (Huesca), Gaviota (Vizcaya) and Yela (Guadalajara), and 4 regasification plants in Barcelona, Huelva, Cartagena and Gijón. It also owns 40% of the Bilbao regasification plant. Enagás terminals in Spain have 2,646,500 m³ of LNG storage capacity and an output capacity of 6,250,000 Nm ³ / h. International presence In 2011, the company began its international activity. Since then, it is a shareholder of TLA Altamira regasification plant in Mexico and participates in gas pipelines construction in that country. Also, it acquired a LNG terminal in Quintero, Chile, in 2012. Independent TSO Enagás ended in August 2012 the certification process as a Transmission System Operator (TSO), followed by the CNE and the European Commission. This certification guarantees the independence of the gas transmission grid regarding Spanish gas producers and shippers, and it is a milestone in the history of the company harmonizing it with the natural gas transmission network operators from other European countries. Shareholding Since Enagás came to market in 2002, it has formed part of the Ibex 35 index. It currently has a free float of 90%, one of the highest on the Spanish continuous market.