Omnicom has finalised its acquisition of Interpublic Group, forming the world’s largest advertising and marketing organisation with over $25 billion in revenue. John Wren remains CEO, with Phil Angelastro as CFO and Philippe Krakowsky and Daryl Simm as Co-Presidents. The merger unites powerful creative, data, and technology capabilities under the Omni platform.
The global advertising and communications industry entered a historic new era with the completion of Omnicom’s acquisition of The Interpublic Group of Companies (IPG), officially creating the world’s largest advertising, marketing, and sales organisation. The deal, finalised after securing all required regulatory approvals and meeting closing conditions, marks one of the most consequential mergers in the history of the marketing services sector. With this integration, Omnicom positions itself not only as the largest player by scale but as a company engineered for what it calls “intelligent growth”—a future defined by the fusion of creativity, advanced data intelligence, and emerging technology.
The newly combined entity—known simply as Omnicom—brings together decades of accumulated expertise, some of the most recognised agency brands across the world, and a client roster that spans virtually every major industry. Central to this merger is Omni, Omnicom’s proprietary intelligence platform, which the company positions as the engine powering its next chapter. By integrating IPG’s capabilities into the Omni ecosystem, the combined organisation aims to create an end-to-end solution that blends data analytics, creative development, media investment, and technology-driven business transformation, all within a unified operating structure.
John Wren, who continues as Chairman and Chief Executive Officer, described the moment as both transformative and future-defining. “This is a defining moment for our company and our industry,” he said, reflecting on the magnitude of the deal. “With the completion of the deal, Omnicom is setting a new standard for modern marketing and sales leadership — creating stronger brands, delivering superior business outcomes, and driving sustainable growth. We’re excited about this next chapter. I want to thank our people, clients, and shareholders for the trust they have placed in us.”
Wren’s comments underscore the ambition of the merger: not merely to scale the organisation, but to fundamentally modernise how marketing services are conceived, connected, and delivered. By unifying the two holding companies, Omnicom has assembled a portfolio that spans creative agencies, media agencies, healthcare communications, experiential specialists, CRM shops, public relations firms, and digital transformation consultancies. Its capabilities now reach across customer experience, commerce, content production, data science, and performance marketing—an ecosystem designed to meet the increasingly complex needs of global brands.
The structure of the deal also reflects a careful balancing of legacy interests. Under the acquisition terms, Interpublic shareholders received 0.344 Omnicom shares for each IPG share they held. Once combined, legacy Omnicom shareholders now own approximately 60.6% of the merged entity, with legacy Interpublic shareholders owning about 39.4% on a fully diluted basis. With pro forma combined revenues exceeding $25 billion, the new Omnicom becomes the largest global player by revenue, overtaking long-time competitors and fundamentally reshaping the competitive landscape. The combined company will trade under the longstanding OMC ticker symbol on the New York Stock Exchange.
Leadership continuity has been central to the integration strategy. Alongside Wren’s continued role as Chairman and CEO, Phil Angelastro remains Executive Vice President and Chief Financial Officer. Philippe Krakowsky—IPG’s most recent CEO—and Daryl Simm will serve together as Co-Presidents and Chief Operating Officers, forming a senior leadership structure designed to represent both sides of the newly formed organisation. Krakowsky, Patrick Moore, and E. Lee Wyatt Jr. have also joined the Omnicom Board of Directors, adding further integration of IPG leadership into the decision-making core of the company. The full leadership team is scheduled for announcement on December 1, 2025, and is widely anticipated across the industry.
The strategic logic behind the merger rests heavily on the convergence of creativity and technology. As the industry evolves at a rapid pace—with AI reshaping production pipelines, data privacy regulations tightening, and brands demanding more measurable outcomes—scale alone no longer guarantees relevance. Omnicom’s bet is that by combining two extensive networks of talent and technology, supported by the Omni platform, it can deliver more sophisticated insights, faster creative iterations, and more precise media orchestration. In short, the goal is to help clients navigate an era where customer journeys are fragmented, consumer expectations are high, and the connection between brand-building and commerce is increasingly direct.
Omni, the intelligence platform at the heart of the combined business, already integrates audience data, media signals, creative tools, and measurement dashboards. By aligning IPG’s data assets and technology solutions with Omni’s infrastructure, Omnicom expects to enhance its predictive modelling capabilities, increase automation in campaign development, and deliver more unified reporting across channels. In practice, this means brands should be able to make decisions informed by richer insights and execute campaigns that remain consistent across markets, formats, and devices—all while improving speed and efficiency.
For clients, the merger promises a new level of end-to-end service. Many global marketers now operate across dozens of markets, with increasingly complex requirements across media, customer experience, e-commerce, and content production. The combined Omnicom aims to provide seamless access to global talent, cross-disciplinary expertise, and integrated strategic leadership under one umbrella. This is expected to appeal not only to major multinational advertisers but also to regional and digital-native brands seeking deeper analytical and creative capabilities.
Internally, both companies have emphasised cultural alignment as a key factor in the success of the integration. Omnicom and IPG have long-standing reputations for talent-driven, decentralised cultures, where agencies operate with a degree of autonomy while still benefiting from centralised support. Maintaining this balance will be one of the major challenges—and opportunities—of the merger. Wren has consistently highlighted that the strength of the combined company lies in its people, and much of the immediate focus will be on ensuring a smooth cultural integration across agencies, geographies, and teams.
Financial markets and industry analysts are already assessing the implications of the merger. With a combined revenue base exceeding $25 billion and an expanded roster of marquee agencies, Omnicom now has unmatched operational leverage in negotiating media deals, investing in technology, and expanding its global footprint. The combined scale also gives Omnicom increased flexibility in pursuing new growth areas such as AI-powered content production, retail media, and digital commerce solutions.
For the broader industry, the merger signals a consolidation wave that may continue in the years to come. Faced with rising competition from consulting firms, technology companies, and in-house brand teams, traditional holding companies are exploring new ways to stay ahead. The Omnicom–IPG combination sets a precedent for how large-scale mergers could reshape capabilities, client relationships, and the long-term structure of the advertising ecosystem.
As the new Omnicom begins its first chapter as the world’s largest advertising group, the spotlight now shifts to how effectively the company can integrate operations, harmonise cultures, and deliver the future of marketing for its clients. With leadership continuity, a powerful intelligence platform, and a unified vision for growth, Omnicom positions itself at the forefront of an industry undergoing profound transformation. The coming months—and the December 1 leadership announcement—will offer the first glimpse of how the company intends to bring its expansive ambitions to life.
