Iberdrola, S.A. engages in the generation, transmission, distribution and supply of electricity in Spain and internationally.
Endesa, S.A. engages in the generation, distribution, and sale of electricity primarily in Spain and Portugal.
Naturgy Energy Group, S.A., together with its subsidiaries, engages in the supply, liquefaction, regasification, transport, storage, distribution, and sale of natural gas in Spain and internationally.
Red Eléctrica Corporación, S.A. transmits electricity and operates and manages transmission network for the electricity system in Spain and internationally.
Acciona, S.A., together with its subsidiaries, engages in the infrastructure, renewable energy, and other business in Spain and internationally.
Enagás, S.A. engages in the development, operation, and maintenance of gas infrastructures in Spain, Mexico, Chile, Peru, Albania, Greece, Italy, and the United States.
Solaria Energía y Medio Ambiente, S.A. engages in the solar photovoltaic power generation business.
Audax Renovables, S.A. engages in the generation of electricity through renewable sources in the Americas and Europe.
Solarpack Corporación Tecnológica, S.A., a multinational company, specializes in electrical generating projects, primarily in the field of solar photovoltaic energy.
Grenergy Renovables, S.A., together with its subsidiaries, operates as an independent energy producer.
Greenalia, S.A., an independent power producer, generates and sells electricity in Spain and rest of Europe, and internationally.