MARSH & MCLENNAN COMPANIES INC revenue for the last year amounted to 509.93 B MXN, the most of which — 320.98 B MXN — came from its highest performing source at the moment, Risk and Insurance Services, the year earlier bringing 239.20 B MXN. The greatest contribution to the revenue figure was made by United States — last year it brought MARSH & MCLENNAN COMPANIES INC 243.33 B MXN, and the year before that — 185.55 B MXN.