AON PLC A DL -,01 revenue for the last year amounted to 15.16 B EUR, the most of which — 10.16 B EUR — came from its highest performing source at the moment, Risk Capital. The greatest contribution to the revenue figure was made by United States — last year it brought AON PLC A DL -,01 7.41 B EUR, and the year before that — 5.37 B EUR.