Arthur J. Gallagher & Co. revenue for the last year amounted to 9.93 B USD, the most of which — 8.64 B USD — came from its highest performing source at the moment, Brokerage, the year earlier bringing 7.30 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Arthur J. Gallagher & Co. 6.43 B USD, and the year before that — 5.56 B USD.