Omnicom Completes Acquisition of Interpublic, Forming the World's Leading Marketing and Sales Company, Built for Intelligent Growth in the Next Era

Rhea-AI Summary

Omnicom (NYSE: OMC) announced completion of its acquisition of Interpublic on November 26, 2025 after receiving all regulatory approvals and satisfying closing conditions. Under the deal, Interpublic shareholders received 0.344 Omnicom shares per Interpublic share and legacy Omnicom shareholders own ~60.6% of the combined company versus legacy Interpublic ~39.4% on a fully diluted basis.

The combined company will trade under the OMC ticker and has pro forma combined revenue in excess of $25 billion. Key leadership remains in place and a full leadership team will be announced on December 1, 2025.

Positive

• Pro forma combined revenue > $25 billion
• Interpublic shareholders received 0.344 Omnicom shares per share
• Legacy ownership split: Omnicom ~60.6%, Interpublic ~39.4%
• Combined company will trade under the OMC ticker

Negative

• None.

Insights

M&A Strategist

Omnicom's acquisition of Interpublic creates a global marketing leader with >$25 billion in pro forma revenue and clear ownership split.

The transaction closes on November 26, 2025, and merges two major agency networks into a single operating company. Legacy Omnicom shareholders hold about 60.6% of the combined company while legacy Interpublic shareholders hold about 39.4%. The share exchange ratio was 0.344 Omnicom shares per Interpublic share.

This deal centralizes capabilities around the stated platform "Omni" and targets scale in data, creativity, and technology. Real value will depend on successful integration of client rosters, cost synergies, and retention of key talent. Watch the announced full leadership team on December 1, 2025 and any near-term disclosures quantifying synergies or integration costs.

Investor Relations Analyst

Deal completion is material and immediately affects ownership, revenue scale, and public listing under OMC.

The combined company will trade under the OMC ticker and reports pro forma revenue in excess of $25 billion. Management continuity includes John Wren as Chairman & CEO and Phil Angelastro as EVP & CFO, with additional board additions named.

Key items to monitor over the next quarter include formal synergy targets, any disclosed one-time charges, client retention rates, and the full leadership roster to be announced on December 1, 2025. These elements will clarify near-term earnings impact and integration risk horizons.

NEW YORK, Nov. 26, 2025 /PRNewswire/ -- Omnicom (NYSE: OMC) today announced the successful completion of its acquisition of The Interpublic Group of Companies, Inc. following receipt of all necessary regulatory approvals and satisfaction of the other closing conditions. The combination creates the world's leading marketing and sales company built for intelligent growth in the next era.

The new Omnicom unites the industry's most comprehensive and connected portfolio of capabilities, all powered by Omni, its advanced intelligence platform. It reimagines how data, creativity, and technology combine with exceptional talent to help clients address their most critical growth priorities.

"This is a defining moment for our company and our industry," said John Wren, Chairman and CEO of Omnicom. "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."

Under the terms of the agreement, Interpublic shareholders received 0.344 Omnicom shares for each share of Interpublic common stock they owned. Legacy Omnicom shareholders own approximately 60.6% of the combined company and legacy Interpublic shareholders own approximately 39.4%, on a fully diluted basis. The combined company, with a pro forma combined revenue in excess of $25 billion, will trade under the OMC ticker symbol on the New York Stock Exchange. 

As previously announced, John Wren remains Chairman & CEO, Phil Angelastro remains EVP & CFO, and Philippe Krakowsky and Daryl Simm serve as Co-Presidents and COOs. Philippe Krakowsky, Patrick Moore and E. Lee Wyatt Jr. have also joined the Omnicom Board of Directors. The company's full leadership team will be announced on December 1, 2025.

About Omnicom 
Omnicom (NYSE: OMC) is the world's leading marketing and sales company, built for intelligent growth in the next era. Powered by Omni, Omnicom's Connected Capabilities unite the company's world-class agency brands, exceptional talent and deep domain expertise across media, commerce, precision marketing, advertising, production, health, public relations, branding and experiential to address clients' critical growth priorities and deliver sustainable growth. For more information, visit www.omc.com. 

Forward-Looking Statements
Certain statements in this press release contain forward-looking statements, including statements within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, from time to time, Omnicom or its representatives have made, or may make, forward-looking statements, orally or in writing. These statements may discuss goals, intentions and expectations as to future plans, trends, events, results of operations or financial condition, or otherwise, based on current beliefs of Omnicom's management as well as assumptions made by, and information currently available to, Omnicom's management. Forward-looking statements may be accompanied by words such as "aim," "anticipate," "believe," "plan," "could," "should," "would," "estimate," "expect," "forecast," "future," "guidance," "intend," "may," "will," "possible," "potential," "predict," "project" or similar words, phrases or expressions. These forward-looking statements are subject to various risks and uncertainties, many of which are outside of Omnicom's control. Therefore, you should not place undue reliance on such statements. Factors that could cause actual results to differ materially from those in the forward-looking statements include:

• risks relating to the merger between Omnicom and IPG, including: uncertainties associated with the merger may cause a loss of both companies' management personnel and other key employees, and cause disruptions to both companies' business relationships and a loss of clients; Omnicom and IPG have incurred and are expected to continue to incur significant costs in connection with the merger and integration; Omnicom may not integrate the business and operations of IPG successfully in the expected time frame; the merger may result in a loss of clients, service providers, vendors, joint venture participants and other business counterparties; and the combined company may fail to realize all or some of the anticipated benefits of the merger or fail to effectively manage its expanded operations;
  
  
• adverse economic conditions and disruptions, including geopolitical events, international hostilities, acts of terrorism, public health crises, inflation or stagflation, tariffs and other trade barriers, central bank interest rate policies in countries that comprise Omnicom's major markets, labor and supply chain issues affecting the distribution of Omnicom's clients' products, or a disruption in the credit markets;
  
  
• international, national or local economic conditions that could adversely affect Omnicom or its clients;
  
  
• losses on media purchases and production costs incurred on behalf of clients;
  
  
• reductions in client spending, a slowdown in client payments or a deterioration or disruption in the credit markets;
  
  
• the ability to attract new clients and retain existing clients in the manner anticipated;
  
  
• changes in client marketing and communications services requirements;
  
  
• failure to manage potential conflicts of interest between or among clients;
  
  
• unanticipated changes related to competitive factors in the marketing and communications services industries;
  
  
• unanticipated changes to, or the ability to hire and retain key personnel;
  
  
• currency exchange rate fluctuations;
  
  
• reliance on information technology systems and risks related to cybersecurity incidents;
  
  
• effective management of the risks, challenges and efficiencies presented by utilizing Artificial Intelligence technologies and related partnerships in Omnicom's business;
  
  
• changes in legislation or governmental regulations affecting Omnicom or its clients;
  
  
• risks associated with assumptions Omnicom makes in connection with its acquisitions, critical accounting estimates and legal proceedings;
  
  
• Omnicom's international operations, which are subject to the risks of currency repatriation restrictions, social or political conditions and an evolving regulatory environment in high-growth markets and developing countries;
  
  
• risks related to Omnicom's environmental, social and governance goals and initiatives, including impacts from regulators and other stakeholders, and the impact of factors outside of Omnicom's control on such goals and initiatives; and
  
  
• other business, financial, operational and legal risks and uncertainties detailed from time to time in Omnicom's Securities and Exchange Commission ("SEC") filings.

The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties that may affect Omnicom's business, including those described in Item 1A, "Risk Factors" and Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations" in Omnicom's Annual Report on Form 10-K for the year ended December 31, 2024 and in other documents filed from time to time with the SEC. Except as required under applicable law, Omnicom does not assume any obligation to update these forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements that speak only as of the date hereof.

View original content:https://www.prnewswire.com/news-releases/omnicom-completes-acquisition-of-interpublic-forming-the-worlds-leading-marketing-and-sales-company-built-for-intelligent-growth-in-the-next-era-302627141.html

SOURCE Omnicom Group Inc.

FAQ

What was the Omnicom acquisition exchange ratio for Interpublic shareholders (OMC)?

Interpublic shareholders received 0.344 Omnicom shares for each Interpublic common share.

When did Omnicom complete the acquisition of Interpublic and begin trading as OMC?

Omnicom completed the acquisition on November 26, 2025, and the combined company will trade under OMC on the NYSE.

How is ownership split between legacy Omnicom and Interpublic shareholders after the deal (OMC)?

On a fully diluted basis, legacy Omnicom shareholders own approximately 60.6% and legacy Interpublic shareholders own approximately 39.4%.

What is the pro forma revenue of the combined Omnicom and Interpublic business?

The combined company has pro forma combined revenue in excess of $25 billion.

Who will lead Omnicom after the Interpublic acquisition and when will the full leadership team be announced?

John Wren remains Chairman & CEO, Phil Angelastro remains EVP & CFO, with Co-Presidents/COOs Philippe Krakowsky and Daryl Simm; the full leadership team will be announced on December 1, 2025.