Iberdrola S.A. revenue for the last year amounted to 53.33 B USD, the most of which — 32.53 B USD — came from its highest performing source at the moment, Customers, the year earlier bringing 36.72 B USD. The greatest contribution to the revenue figure was made by Spain — last year it brought Iberdrola S.A. 19.82 B USD, and the year before that — 24.15 B USD.