Omnicom Group’s takeover of rival Interpublic Group (IPG), finalized on Wednesday, November 26, has created the world’s largest advertising holding company.
Below, we break down key numbers from the deal.
The big numbers
$13.25 billion: The deal price
$26 billion: The newly combined company’s revenues (based on 2024 figures), making it the world’s largest advertising holding group
$750 million: The cost savings Omnicom and IPG expect to generate once combined
60.6%: The portion of the company owned by Omnicom shareholders, while IPG shareholders own 39.4%
Most recent earnings
$4 billion: Omnicom’s Q3 2025 revenue, up 4% year-over-year*
2.6%:
