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‘A defining moment for our company’: John Wren’s memo to Omnicom and Interpublic staff

By Amy Houston, Senior Reporter

The Drum

November 27, 2025 | 9 min read

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As Omnicom completed its historic acquisition of Interpublic, its chief executive addressed employees for the first time as one unified company.

Yesterday, Omnicom formally closed its transaction with Interpublic, instantly creating the largest marketing and sales organization in the world. Minutes after the announcement, chief executive officer John Wren issued his first company-wide memo to employees, both longtime Omnicom staff and new colleagues joining from Interpublic. 

Wren struck a tone of gratitude, ambition and clarity: this merger, he said, is a “historic milestone,” one made possible by “hard work, creativity and innovation” across both companies.

“This is a defining moment for our company,” he wrote.

Welcoming a unified team

Wren opened his message by extending “a very warm welcome” to Interpublic employees.

“It’s an honor to bring our groups together and lead an organization with the best and brightest minds in the industry,” he said.

The company’s full leadership team will be announced on December 1. 

The union, Wren suggested, is not just about scale but about “exploring, specializing and innovating” as a collective.

The combined workforce will soon be supported by the Omnicom Hub, a new internal portal that provides information on benefits, policies, technology systems and day-to-day guidance as the two companies begin operating side by side.

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Winning for clients

Wren framed client success as the fundamental driver of the merger.

The new Omnicom-Interpublic entity now holds one of the industry’s broadest portfolios of agencies, sales units and specialist capabilities – something Wren believes positions the company for “intelligent growth,” a phrase he used to describe a next-gen approach to modern marketing.

“With these tools, you’ll be able to turn ideas into results and create impactful and culturally relevant work. This work will shape client success and the future of the industry,” he wrote.

AI at the center of the combined group

If there was a single strategic through-line in Wren’s memo, it was this: he believes that AI is central to the future of the new Omnicom.

“We have the most comprehensive and connected portfolio of capabilities, powered by Omni,” he wrote, referring to Omnicom’s intelligence platform built on proprietary data and AI, which he sees as the unifying system that will power collaboration across the enlarged company.

What’s next?

Employees can expect more clarity next week, when the company unveils its combined leadership lineup. In the meantime, Wren encouraged staff in the US to enjoy the Thanksgiving holiday.

“I’m excited for all that we will achieve in this new chapter,” he wrote.

Read the memo in full below.

All,

Earlier today, we announced the completion of our transaction with Interpublic. As I write to you for the first time as one team, I want to extend a very warm welcome to our new colleagues from Interpublic. It’s an honor to bring our groups together and lead an organization with the best and brightest minds in the industry. Together, we will create the world’s leading marketing and sales company – built for intelligent growth in the next era. This historic milestone is possible thanks to your hard work, creativity and innovation.

As we take our next steps together, I truly believe the best is yet to come. We have the most comprehensive and connected portfolio of capabilities, powered by Omni, our advanced intelligence platform fueled by Omnicom’s proprietary data and AI capabilities. With these tools, you’ll be able to explore, specialize and innovate – turning ideas into results and creating impactful and culturally relevant work. This work will shape client success and the future of the industry.

Early next week, we will introduce our leadership team and you can expect to learn more from them about how we will come together and begin working side by side. The Omnicom Hub will also go live, providing information about benefits, policies, technology and other areas across our combined company.

This is a defining moment for our company and I’m excited for all that we will achieve in this new chapter. Thank you again for your contributions and continued dedication. And for those in the United States, I hope you have a wonderful Thanksgiving.

Sincerely,
John Wren
Chairman & Chief Executive Officer
Omnicom

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Featuring:

IPG

The Interpublic Group of Companies, Inc. (IPG) is an American publicly traded advertising company. The company consists of five major networks: FCB, IPG Mediabrands,...

Omnicom

A global leader in marketing communications, Omnicom provides brand and advertising services to over 5000 clients in over 100 countries.

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