About Omnicom Group Inc. Omnicom Group Inc. (NYSE-OMC) is a leading global marketing and corporate communications company. Omnicom’s branded networks and numerous specialty firms provide advertising, strategic media planning and buying, digital and interactive marketing, direct and promotional marketing, public relations and other specialty communications services to over 5,000 clients in more than 100 countries. For further information on Omnicom and its brands, please visit www.omnicomgroup.com