Omnicom Group Inc. revenue for the last year amounted to 14.69 B USD, the most of which — 7.89 B USD — came from its highest performing source at the moment, Advertising and Media, the year earlier bringing 7.42 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Omnicom Group Inc. 7.47 B USD, and the year before that — 7.37 B USD.