Interpublic Group
MergedNew York, New York, United States · Founded 1961
10001+ employees · IPG
Interpublic Group (IPG) was an American advertising and marketing services company headquartered in New York City, which was acquired by and folded into Omnicom Group in 2025.
Where they sit
Stack tier: Ecosystem Services (A)
Marketing AnalyticsMarketing AgencyProgrammatic Platform
Formerly one of the four largest global advertising holding companies; now a wholly-owned subsidiary of Omnicom Group following the November 2025 merger close, forming the world's largest advertising group.
Ownership
Parent: Omnicom Group