Omnicom Closes $25 Billion Interpublic Acquisition, Creating Marketing Industry Giant

John Wren's $25 billion bet on scale vaults Omnicom past Publicis to claim top spot, but integration challenges loom large

The holding company era has just entered its next chapter. Omnicom has completed its acquisition of The Interpublic Group of Companies, closing a $25 billion deal that fundamentally redraws the map o…