Omnicom Completes $13.25 Billion Acquisition of Interpublic Group

Omnicom Group has finalized its acquisition of Interpublic Group in a $13.25 billion all-stock transaction, creating the world's largest advertising holding company. The combined entity will have approximately $25 billion in annual revenue and enhanced capabilities in digital advertising, data analytics, and programmatic media buying.

Last updated Feb 9, 2026 by the ATDb Editorial Team · Connections updated May 3, 2026