Madison Avenue's center of gravity is shifting. Omnicom is now officially the world's largest ad agency holding company, thanks to its $9 billion acquisition of Interpublic Group, which closed Friday.
Omnicom Advertising was announced in mid-2024 and took effect in January of 2025 as the company was making integration plans related to its IPG acquisition. It oversees the company's global ad ...
Back in 2018, Omnicom passed on buying Acxiom for $2 billion, which went to IPG instead. In retrospect, that was a good move twice over, CEO John Wren told investors during the holding company’s Q1 ...