Omnicom Group Inc. · New York, NY United States ·(NYSE: OMC)

While it might not be omnipotent, Omnicom Group can create advertising that is omnipresent. The company ranks as the world's #1 corporate media services conglomerate, with advertising, marketing, and public relations operations serving some 5,000 clients in more than 100 countries. It serves global advertising clients through its agency networks BBDO Worldwide, DDB Worldwide, and TBWA Worldwide, while such firms as GSD&M's Idea City, Merkley + Partners, and Zimmerman Advertising provide services for regional and national clients. More than 160 other firms in its Diversified Agency Services division, including Fleishman-Hillard, Integer, and Rapp, provide public relations and other marketing services. To read the full description, subscribe now.