Insights & Strategy
Who are the 5 Largest PR Firms in the World?
With such high competition in the public relations field, it often becomes hard to say just who does what best.
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Fleishman Hillard
Insights & Strategy
FleishmanHillard Absorbs Porter Novelli at Omnicom
FleishmanHillard is a global communications agency founded 1946 in St. Louis. Owned by Omnicom since 1997; one of four cornerstone networks inside Omnicom Public Relations Group. Global CEO J.J. Carter (since October 2024); Americas CEO Jillian Janaczek (since February 2026, formerly CEO of Porter Novelli). Absorbed Porter Novelli February 2026.