WILLIS TOWERS WATSON revenue for the last year amounted to 9.59 B EUR, the most of which — 5.58 B EUR — came from its highest performing source at the moment, Health, Wealth & Career, the year earlier bringing 5.06 B EUR. The greatest contribution to the revenue figure was made by United States — last year it brought WILLIS TOWERS WATSON 4.95 B EUR, and the year before that — 4.54 B EUR.