Campaign's Global Network Reports on Foster Amended Complaint and Alleged $350 Million in Retained Rebates

An amended complaint filed by Richard Foster, former CEO of WPP's Motion Content Group, is drawing wide coverage in the advertising and business press. Reporting centers on Foster's termination, the alleged $350 million in retained rebates, and the complaint's allegations regarding a Sony Group Corporation investigation.

Campaign UK and its sister publications, Campaign US, Campaign Asia, Campaign India, and Campaign Canada reported on Foster's amended complaint. The complaint alleges that Sony, a WPP client, launched an investigation that found WPP retained $350 million in client rebates, including a "broker model that concealed the full value of rebates from clients."

Campaign Asia also questioned the implications for advertisers in a separate article, asking, "Is our CMO minding the store?"

Campaign UK reported on WPP's response to Foster's lawsuit, with WPP characterizing the case as a "naked attempt" to seek an "exorbitant payout."

The case, Foster v. WPP, is pending in the Supreme Court of the State of New York, New York County (Index No. 659721/2025). The amended complaint was filed on August 13, 2026. 

Brewer, Attorneys & Counselors represents plaintiff Richard Foster. Firm partner William A. Brewer III is lead counsel.

Read the Campaign UK article here.

Read the Campaign US article here.

Read the Campaign Asia article here.

Read the Campaign India article here.

Read the Campaign Canada article here.