Fortis Inc. revenue for the last year amounted to 8.69 B USD, the most of which — 2.27 B USD — came from its highest performing source at the moment, UNS Energy, the year earlier bringing 2.03 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Fortis Inc. 4.63 B USD, and the year before that — 4.22 B USD.