KOC HOLDING AS revenue for the last year amounted to 34.31 B EUR, the most of which — 40.00 B EUR — came from its highest performing source at the moment, Energy, the year earlier bringing 40.19 B EUR. The greatest contribution to the revenue figure was made by Turkey — last year it brought KOC HOLDING AS 33.30 B EUR, and the year before that — 30.39 B EUR.