Omnicom Group Inc. revenue for the last year amounted to 15.69 B USD, the most of which — 8.47 B USD — came from its highest performing source at the moment, Media & Advertising, the year earlier bringing 7.89 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Omnicom Group Inc. 8.19 B USD, and the year before that — 7.47 B USD.