It installed capacity of 11,120 megawatts of power and 8.9 million customers.

[2] The headquarters were in Madrid and the chairman was Pedro López Jiménez.

Formerly a constituent of the IBEX 35 index, the company is a part of the Naturgy Energy Group.

[3] The company had the following businesses: Prior to 2008 around 45% of the shares were owned by Grupo ACS.

[4] In July 2008, Gas Natural agreed to buy Grupo ACS's stake worth €7.6 billion.