Omnicom announced the completion of its acquisition of Interpublic Group after the close of markets today.  The combination creates the largest ad marketing group in the world.  

"This is a defining moment for our company and our industry," said John Wren, who remains 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.” 

As previously announced, Phil Angelastro remains executive vice president and CFO, and Philippe Krakowsky and Daryl Simm serve as co-presidents and COOs.  Krakowsky, Patrick Moore, CEO Opry Entertainment and former IPG board member and former Fortune Brands CFO E. Lee Wyatt Jr. have also joined the Omnicom Board of Directors. 

 Omnicom said the company's full leadership team will be announced on December 1, 2025. 

In advance of closing the acquisition, Omnicom earlier today filed a document with the SEC reporting that total consideration for the purchase is $9.066 billion. That's down more than $4 billion from the estimated value of the transaction--$13.25 billion--when it was announced last December, largely because Omnicom shares have fallen about 30% over that time.

The deal is a  stock swap which values each share of IPG common stock at 0.344% of each Omnicom share. Cash is being paid for fractional shares and the company said the cash part of the transaction was immaterial. After closing, Omnicom shareholders are expected to own about 60.6% of the combined company, and former IPG shareholders will own about 39.4%.   

Total consideration may also be different from the total cited in the document, which was based on the price of Omnicom shares on November 19th. “A 10% increase or decrease in Omnicom’s share price would increase or decrease the consideration by approximately $895.4 million and impact goodwill by a corresponding amount,” the firm stated.  

Omnicom also highlighted some pro forma financial data showing revenue, profit and other figures that assumes the companies had been combined for full year 2024.  

Total revenue for 2024 would have been $26.38 billion, with Omnicom contributing $15.689 billion and IPG contributing $10.691 billion. Net income for the year: $1.938 billion, with Omnicom contributing $1.574 billion and IPG contributing $715.7 million.  

For the first 9 months of 2025 combined total revenue was $19.096 billion with Omnicom contributing $11.743 billion and IPG contributing $7.353 billion. Net income was $986.9 million with Omnicom contributing $941.6 million and IPG contributing $205.4 million. A deduction of $160 million was attributed to the costs of completing the transaction.   

Last December, when the proposed deal was announced agency research firm COMvergence did a billings analysis that concluded that the combined company would be the leader globally as well as in North America and Latin America, and number two in the Europe, Middle East & Africa and Asia Pacific regions behind WPP Media.