Ameren Corporation revenue for the last year amounted to 7.50 B USD, the most of which — 3.83 B USD — came from its highest performing source at the moment, Ameren Missouri, the year earlier bringing 4.01 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Ameren Corporation 7.50 B USD, and the year before that — 7.96 B USD.