FIRSTENERGY CORP revenue for the last year amounted to 10.86 B CHF, the most of which — 9.10 B CHF — came from its highest performing source at the moment, Regulated Distribution, the year earlier bringing 9.77 B CHF. The greatest contribution to the revenue figure was made by United States — last year it brought FIRSTENERGY CORP 10.84 B CHF, and the year before that — 11.52 B CHF.