NRG Energy, Inc. revenue for the last year amounted to 28.82 B USD, the most of which — 12.55 B USD — came from its highest performing source at the moment, East, the year earlier bringing 16.76 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought NRG Energy, Inc. 28.82 B USD, and the year before that — 31.54 B USD.