Law Firms Press WPP Investors Ahead of Dec. 8 Lead-Plaintiff Deadline

The SDNY case alleges WPP misled investors over its media arm following a July 9 update that preceded an 18% one-day share decline.

Overview

The securities class action, Marty v. WPP plc (25-cv-08365), is pending in the Southern District of New York and remains unadjudicated with no class certified.
Investors who bought WPP shares or ADSs between February 27, 2025 and July 8, 2025 face a December 8, 2025 deadline to seek lead-plaintiff status under the PSLRA.
Filings contend WPP and certain executives concealed problems at WPP Media/GroupM, including lost market share and an inability to compete effectively during macroeconomic headwinds.
Notices cite WPP’s July 9 trading update reporting deteriorating Q2 performance and distraction from GroupM restructuring, followed by a share price drop from $35.82 to $29.34.
Multiple firms, including Kahn Swick & Foti, Glancy Prongay & Murray, Rosen Law Firm, Levi & Korsinsky, Bernstein Liebhard, ClaimsFiler, and DJS Law Group, are soliciting eligible shareholders to contact them before the deadline.