Omnicom Completes Acquisition of Interpublic Group, Creating the Largest Ad Agency by Revenue

Omnicom officially completed its acquisition of Interpublic Group on Wednesday, in a $9 billion all-stock deal that creates the largest advertising agency holding company by revenue. The combined company will generate annual revenue exceeding $25 billion, Omnicom said.

The agency mega-merger, first announced in December, creates a portfolio that unites creative networks such as BBDO and McCann, media buying agencies including OMD and Initiative, and the Omni and Acxiom data platforms.

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