WPP Investors Face Dec. 8 Lead-Plaintiff Deadline in SDNY Securities Suit

The case accuses the advertising giant of overstating GroupM’s health, with a July 2025 trading update preceding an 18% share drop.

Overview

Bernstein Liebhard on Dec. 5 reminded shareholders to seek lead-plaintiff appointment by Dec. 8 in the securities class action against WPP.
Levi & Korsinsky issued a Dec. 4 notice describing a proposed class period of Feb. 27, 2025 through July 8, 2025, while Bernstein Liebhard’s notice spans Feb. 22, 2024 through July 8, 2025.
The lawsuit, filed in the Southern District of New York, alleges violations of the Securities Exchange Act of 1934 by WPP and certain senior officers.
Complaints assert that WPP misled investors about the state of its media arm, alleging it was not equipped for macroeconomic pressures and was losing market share.
WPP’s July 9, 2025 trading update cited macro uncertainty, weaker net new business and GroupM restructuring distraction, after which the stock fell about 18% in one day.