EXELON CORP revenue for the last year amounted to 480.12 B MXN, the most of which — 171.36 B MXN — came from its highest performing source at the moment, Commonwealth Edison Company, the year earlier bringing 132.96 B MXN. The greatest contribution to the revenue figure was made by United States — last year it brought EXELON CORP 480.12 B MXN, and the year before that — 369.04 B MXN.