The company was founded in 1912 as
Unión Eléctrica Madrileña and it traded under that name until 1970 when the name was changed to
Unión Eléctrica. In 1982 it merged with
Fuerza Eléctrica de Noroeste, S.A. (Fenosa) to form
Unión Eléctrica Fenosa. In 2000 the name was shortened to
Unión Fenosa. In 2008 the company was acquired by the
Gas Natural group.
Carbon intensity ==Structure==