
WPP's PR Empire: From Burson-Marsteller and Hill & Knowlton to the Modern Holding Company
On April 13, 2026, WPP confirmed it hired Goldman Sachs to explore a sale of Burson. WPP is also fighting a GroupM whistleblower suit that escalated into an August 2026 sanctions motion. The full arc of WPP's PR empire, from Burson-Marsteller to the modern holding company.







