Omnicom closes Interpublic acquisition for final purchase price of $9 billion

Omnicom has closed its acquisition of rival Interpublic Group, the company confirmed in a stock market filing on Wednesday evening, November 26.

The final purchase price for IPG was $9 billion (£6.8 billion) in the all-stock deal, based on Omnicom's share price of $71.50 after the market closed. 

The deal creates a company with revenues of $18 billion so far this year, compared to the closest rival, Publicis Group, with $12 billion, based on results for the first nine months of 2025.

Omnicom said the company would have "combined revenue in excess of $25 billion" per year.

The completion of the acquisition follows the EU giving the green light on Monday, the final regulatory hurdle.

The deal was first announced a year ago in December 2024, when IPG was valued at $13.5 billion. However, the final purchase price dropped to $9 billion because Omnicom's share price had declined since the deal was announced.

Under the terms of the all-stock transaction, Interpublic shareholders will receive 0.344 Omnicom shares for each IPG share they own. It means legacy Omnicom shareholders will own approximately 60.6% of the combined company and legacy Interpublic shareholders 39.4%.

John Wren remains chairman and CEO and Phil Angelastro is executive vice-president and CFO. Philippe Krakowsky, the chief executive of Interpublic, becomes co-president and chief operating officer, alongside Daryl Simm, who already holds the same role at Omnicom and becomes co-president and co-COO.

Wren said, “This is a defining moment for our company and our industry. 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.”  

The complete leadership team will be announced on December 1.

Full details of how the new Omnicom will be structured, including the future of IPG staff and agency brands, are yet to be confirmed.

Ahead of the deal’s closure, IPG moved FutureBrand out of McCann Worldgroup and into regional McCann offices. MullenLowe and FCB were also reorganised in the UK. In the first nine months of 2025, the group shed 3,200 roles and vacated 135,000 square feet of office space. 

Omnicom has been seeking to reduce its global headcount by up to 3% this year, following 3000 roles cut from its global workforce in 2024. In October, it confirmed that it was carrying out a “rigorous” review of all of its agency brands, in which it is expected to scale back its DDB network.

Last year, Omnicom also reorganised its creative agencies under Omnicom Advertising Group. When asked if IPG creative agencies would follow the OAG structure on the conference call that kicked off the takeover process in December last year, Krakowsky said: “Collapsing brands is not a winning, long-term strategy.”

Omnicom owns Omnicom Advertising Group and Omnicom Media Group, with agency brands in the UK including MG OMD (including Omnigov), OMD UK, Hearts & Science, PHD UK, AMV BBDO, TBWA and Adam & Eve/DDB.

IPG agency brands include FCB, McCann Worldgroup, McCann, MullenLowe Global, MullenLowe UK and IPG Mediabrands shops UM, Initiative, Mediahub and Kinesso.