J
J. Walter Thompson
RebrandedNew York, New York, United States · Founded 1864
10001+ employees
Sourced & current · updated Jul 22, 2026
J. Walter Thompson (JWT) was one of the world's oldest and largest advertising agencies, renowned for iconic brand campaigns across the globe before merging with Wunderman in 2018 to form Wunderman Thompson.
Where they sit
Stack tier: Core Platforms (S)
Marketing Agency
Historically one of the world's largest and oldest full-service advertising agencies; brand retired in 2018 following merger into Wunderman Thompson, itself later absorbed into VML.
Ownership
Parent: WPP plc