
WPP's PR Empire: From Burson-Marsteller and Hill & Knowlton to the Modern Holding Company
WPP built the largest PR roster in the world over 40 years, survived the 2009 recession, and is now unwinding it: Burson up for sale, FGS Global sold to KKR, and Omnicom having taken the #1 holdco spot in November 2025.







