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Omnicom Completes IPG Acquisition, Creating World’s Largest Advertising Group

Omnicom Group has officially completed its acquisition of Interpublic Group of Companies (IPG), finalizing a deal that creates the world’s largest advertising holding company and marks a major shift in the global agency landscape.

The stock-for-stock transaction, valued at approximately $8.9 billion, closed on November 26, 2025. With the merger, Omnicom moves to the top of the global agency rankings, reporting $26.4 billion in combined worldwide revenue for 2024, ahead of Accenture Song, WPP, and Publicis Groupe.

Omnicom Chairman and CEO John Wren, along with senior leadership, described the merger as a strategic move focused on scale, technology, and operational efficiency rather than expansion for its own sake.

Creative Networks Restructured

As part of the integration, Omnicom confirmed it will retire three legacy creative networks, DDB, FCB, and MullenLowe. FCB will be consolidated into BBDO, while TBWA will absorb both DDB and MullenLowe. McCann will remain the sole surviving IPG global creative network, selected for its strong international presence and brand recognition.

The move reflects a broader industry trend toward fewer, globally scalable agency brands.

Media Agencies Largely Unchanged

Unlike the creative restructuring, Omnicom’s media operations will remain largely intact. The combined company will continue to operate five global media agency brands, with no immediate plans to eliminate any of them.

Technology at the Core

Omnicom executives positioned the deal as a technology-driven merger, highlighting the company’s AI-powered intelligence platform, Omni, and an expanded agentic framework designed to unify data, identity, and activation across the organization.

Leadership said the combined entity now holds one of the strongest data and technology foundations in the advertising industry.

Workforce Impact

The merger will result in significant job reductions. Omnicom expects its global workforce to total approximately 105,000 employees, down from a combined 128,200 at the end of 2024, implying around 23,200 job cuts worldwide.

A Giant Reborn

As Omnicom enters this new chapter, it stands taller, leaner and more technologically ambitious than ever before. Built on the foundations of BBDO, McCann and TBWA, the company is betting that clarity, scale, and data-driven creativity will define the next decade of marketing.

The merger doesn’t just create the world’s largest agency holding company, it redraws the rules of what an agency is expected to be.