WESCO International, Inc. revenue for the last year amounted to 22.39 B USD, the most of which — 8.61 B USD — came from its highest performing source at the moment, Electrical & Electronic Solutions, the year earlier bringing 8.82 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought WESCO International, Inc. 16.61 B USD, and the year before that — 15.86 B USD.