WESCO INTERNATIONAL INC revenue for the last year amounted to 380.22 B MXN, the most of which — 146.25 B MXN — came from its highest performing source at the moment, Electrical & Electronic Solutions, the year earlier bringing 172.10 B MXN. The greatest contribution to the revenue figure was made by United States — last year it brought WESCO INTERNATIONAL INC 282.11 B MXN, and the year before that — 309.29 B MXN.