Omnicom Media Group

One of the top two or three largest global media agency networks by billings, competing directly with GroupM and Publicis Media

Omnicom Media Group (OMG) is the media services division of Omnicom Group, one of the largest advertising holding companies in the world. OMG oversees a portfolio of globally recognized media agency brands — most notably OMD, PHD, and Hearts & Science — providing integrated media planning, buying, and optimization services to some of the world's largest advertisers. With operations spanning more than 100 countries, OMG manages hundreds of billions of dollars in media investment annually on behalf of clients across virtually every industry vertical. OMG's agencies leverage proprietary data platforms, audience intelligence tools, and programmatic capabilities to deliver cross-channel media strategies encompassing digital, TV, out-of-home, audio, and emerging media. The group has invested heavily in data and technology infrastructure, including its Omni marketing orchestration system, which provides a unified data and analytics layer across all agency brands. This enables audience targeting, campaign measurement, and attribution at scale. In the broader AdTech and media ecosystem, OMG competes directly with WPP's GroupM, Publicis Media, IPG Mediabrands, and Dentsu Media. Its scale affords significant media buying leverage, while its data capabilities and talent depth position it as a strategic partner for enterprise-level advertisers seeking sophisticated, insight-driven media solutions. The 2024 announced merger between Omnicom Group and Interpublic Group, if completed, would further consolidate OMG's market position.