Omnicom acquires Interpublic: keys to a merger of global advertising giants

After the merger, the two companies have a combined turnover of more than 24 billion euros, surpassing WPP, which was the world's leading agency group.
Dos manos estrechándose, simbolizando acuerdo, sobre fondo de oficina moderna con íconos digitales. Logos de Omnicom e IPG presentes. Innovación y colaboración.
December 1, 2025

Omnicom, the third-largest advertising agency globally, with a portfolio of over 5,000 clients and a presence in 70 countries, has officially acquired Interpublic, the fourth-largest.This merger has created the largest advertising agency in the world, surpassing WPP.

According to the issued statement, Interpublic shareholders will receive 0.344 shares of Omnicom for each common share of Interpublic. The new company, which will retain the Omnicom name and trade under the symbol OMC on the New York Stock Exchange, will be owned 60.6% by former Omnicom shareholders and 39.4% by former Interpublic shareholders, on a fully diluted basis.

A giant with more than $25 billion in revenue

The new Omnicom is born with combined pro forma revenues exceeding $25 billion . It will have a workforce of more than 100,000 professionals worldwide and offer comprehensive services ranging from media and advertising to CRM, digital commerce, public relations, branding, and precision marketing.

Beyond the numbers, the strength of the new group lies in its Omni platform, an advanced intelligence tool that connects data, creativity, and technology with human talent. This is a key component of what John Wren, president and CEO of the new Omnicom, describes as “smart growth in the next era.

“This strategic acquisition creates significant value for both groups of shareholders by combining highly complementary, world-class technology and data platforms that enable new offerings to better serve our clients and drive growth,” said John Wren, Chairman and CEO of Omnicom.Through this combination, we are positioned to accelerate innovation and capitalize on the significant opportunities created by new technologies in this era of exponential change. Now is the perfect time to unite our technologies, capabilities, talent, and geographic presence to deliver superior, data-driven results for clients. We are excited to welcome Philippe and the entire Interpublic team to the Omnicom family.”

Power sharing: continuity and new additions

John Wren will continue to lead the new Omnicom as president and CEO, while Phil Angelastro will remain as executive vice president and CFO. Philippe Krakowsky and Daryl Simm will serve as co-presidents and chief operating officers. In addition, Krakowsky, Patrick Moore, and E. Lee Wyatt Jr. are joining Omnicom’s board of directors. The rest of the management team will be announced.

Impact on the market

Omnicom and Interpublic are both giants in the advertising sector. Throughout their histories, they have been behind some of the most iconic ads ever, such as L’Oreal’s Because I’m Worth It.”

Omnicom owns agencies like BBDO, TBWA, FleishmanHillard, and Omnicom Media Group. Interpublic or IPG Group is a collection of companies dating back to the 1930s, including FCB, IPG, Mediabrands, McCann Worldgroup, and MullenLowe Group. Together, they provide services in public relations, sports marketing, and talent representation.

The turnover of both companies is high, with Omnicom’s turnover ($14,891 million USD ) being higher than IPG’s. In the case of Interpublic, they reached $10.890 million USD . The union of these would far surpass what is considered the largest agency in the world, WPP, which in 2023 had a total turnover of $17,245 million USD.

Furthermore, their merger would not only establish them as the largest advertising company worldwide but also give them access to the most sought-after clients globally, including Apple, L’Oreal, Disney, PepsiCo, and Johnson & Johnson.

Responding to technological advancements

In an era where technology and trends are constantly evolving within the advertising industry, their union would indeed strengthen their position, enabling them to become a more formidable player in the industry and address areas where they have previously lagged, particularly in implementing artificial intelligence to automate processes.

Publicis has addressed this challenge quickly and efficiently, becoming one of the most highly regarded companies in the sector, as noted by the Wall Street Journal. This success has allowed them to secure high-profile clients such as Pfizer (previously with Interpublic), Hershey, Lego, and Sky, the entertainment medium.

As a result, Interpublic has sold some of its creative and underperforming agencies to focus more on technology investments. Omnicom, on the other hand, has concentrated on smaller operations and organically created more technological offerings. However, earlier this year, it made its largest acquisition to date by purchasing Flywheel, an eCommerce company, for $835 million USD.

If the acquisition proceeds, it may inspire other major and even independent agencies to follow suit to enhance their relevance in the industry.

Image: GPT

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