Holding company, Omnicom, is a leading global advertising, marketing and corporate communications company. Omnicom’s companies operate in the disciplines of advertising, marketing services, specialty communications, interactive/digital media and media buying services, providing services to over 5,000 clients in more than 100 countries. Founded in 1986, the company includes three global advertising agency networks, leading US-based National Advertising Agencies, Diversified Agency Services and Omnicom Media Group, which consists of two full service media companies, OMD Worldwide and PHD Network, and several media specialist companies.