IPG

The Interpublic Group of Companies, Inc.

A holding company for a global network of advertising and marketing agencies, among the world's largest until it was folded into rival Omnicom in 2025. Its roots trace to agencies founded in 1902 and 1911 that merged into McCann-Erickson, and in 1961 the parent was formed, inspired by General Motors, to shelter competing shops like McCann, FCB, and Weber Shandwick under one umbrella. The name "Interpublic" signals those interconnected agencies serving the same public.