Omnicom Group

One of the world's largest advertising and marketing holding companies, and following the 2025 acquisition of Interpublic Group, the largest by combined revenue and headcount

Omnicom Group is an American multinational holding company specializing in media, marketing, and corporate communications.¹ On the data and identity side, Omnicom has unified over 2.6 billion verified global IDs through its Omni platform and Acxiom RealID™, enabling privacy-first audience understanding without reliance on third-party cookies.² Omnicom serves as the parent company of major agency networks including BBDO, DDB, TBWA, and Omnicom Media Group — which comprises OMD, PHD, and Hearts & Science — as well as Flywheel, and the DAS Group of Companies, which spans health, precision marketing, commerce, and advertising.¹ In June 2025, the Federal Trade Commission approved Omnicom's $13.5 billion acquisition of Interpublic Group, subject to a consent decree, with the merger completing later that year.¹ Source 1: wikipedia.org — Omnicom Group Source 2: omc.com — About