WPP PLC (WPP) Securities Class Action Lawsuit Filed [October 23, 2025]

Introduction to WPP PLC (WPP) Securities Class Action Lawsuit

A securities fraud class action has been filed against WPP PLC (NYSE: WPP) in the Southern District of New York. The case covers investors who bought WPP common stock between February 27, 2025 and July 8, 2025. According to the complaint, investors allege WPP and its senior executives misrepresented the strength of 2025 revenue guidance, the company's ability to offset client losses through "ramping" new wins, and the readiness of its media arm to compete despite macroeconomic uncertainty. On July 9, 2025, WPP issued a trading update cutting its full‑year like‑for‑like revenue outlook to a decline of 3% to 5% and acknowledged weaker net new business and worsening June performance, contradicting prior assurances. Investors reacted immediately: the stock fell 18.1% in one day, dropping from a July 8 close of $35.82 to $29.34 on July 9.

WPP PLC (WPP) Securities Lawsuit Case Details

Case Name: Marty v. WPP PLC, et al.

Case No.: 1:25-cv-08365

Jurisdiction: U.S. District Court, Southern District of New York

Filed on: October 9, 2025

WPP PLC (WPP) Company Profile

WPP is a global communications company providing advertising, media management, consultancy, public relations, branding, and identity services worldwide. Its media arm, WPP Media (formerly GroupM), uses data analytics and AI technologies to create, plan, and buy integrated media campaigns for global clients.

WPP PLC (WPP) Securities Lawsuit Class Period

February 27, 2025–July 8, 2025, inclusive.

All investors who purchased or otherwise acquired WPP common stock during the Class Period may be eligible to join the WPP PLC (WPP) class action lawsuit.

Allegations in the WPP PLC (WPP) Securities Class Action Lawsuit

The lawsuit targets WPP PLC and senior executives Mark Read (Chief Executive Officer), Joanne Wilson (Chief Financial Officer), and Brian D. Lesser (Global Chief Executive Officer of WPP). Investors allege these defendants repeatedly assured the market about 2025 revenue guidance and the health of the company's media business, emphasizing that their guidance accounted for macro uncertainty and that new wins and ongoing sales would offset client losses.

On February 27, 2025, during an earnings call, CFO Joanne Wilson said WPP was guiding like‑for‑like revenue to a range of flat to minus 2%, describing it as cautious in light of uncertainty and stating performance would strengthen over 2025 as recent wins ramped after first‑half runoff of historic client losses. That same day, WPP Media chief Brian D. Lesser described 2025 as a defining year, touting an AI‑driven data strategy, simplification, and efficiency, and asserted, "we are competing effectively… We have everything we need to compete, win and retain clients now."

As the year progressed, on April 25, 2025, CEO Mark Read told investors he had not seen significant changes in client spending and that full‑year guidance remained within the initial range, again pointing to anticipated macro uncertainty. Wilson reinforced that confidence, stating the like‑for‑like range reflected conditions and that second‑half performance would improve as wins fully ramped. Then, on May 28, 2025, Lesser issued a press release promoting WPP Media's AI‑powered product and promise to unlock "limitless opportunities for growth."

According to the complaint, these statements created the false impression that defendants possessed reliable information supporting WPP's revenue outlook and growth trajectory while minimizing risks from seasonality and macroeconomic fluctuations. In reality, investors allege WPP's media arm was not equipped to compete effectively and had begun to lose market share, and the anticipated new business wins and client retention did not materialize as represented.

The Truth Emerges

The alleged truth surfaced on July 9, 2025, when WPP issued a press release and trading update. The company disclosed a deterioration in performance as the second quarter progressed and cut 2025 like‑for‑like revenue guidance from flat to -2% down to -3% to -5%, citing continued macro uncertainty weighing on client spend and weaker net new business than expected. Management stated, "Since the start of the year, we have faced a challenging trading environment with macro pressures intensifying and lower net new business," and noted June was worse than anticipated. The complaint also notes the disclosure was followed immediately by the announcement of the CEO's retirement.

These revelations contradicted earlier assurances that guidance was already cautious and that ramping new wins and ongoing sales would offset client losses. Mark Read further acknowledged that while the new WPP Media strategy implementation was "going well," it was not translating into better performance, had come with "some distraction," and the unit faced "a deficit of new business opportunities."

Market Reaction

The market reacted the same day. From a July 8, 2025 closing price of $35.82 per share, WPP's stock fell by $6.48 to close at $29.34 on July 9, a one‑day decline of about 18.1%. The complaint alleges investors bought at inflated prices throughout the class period and absorbed the loss when the reduced guidance and admissions were revealed.

Next Steps

• Submissions for lead plaintiff are due December 8, 2025.
• The Court will issue its order for lead plaintiff and counsel in the weeks after submissions are due.
• The Court will then consider motion for class certification.
• The Court will later consider a Motion to Dismiss.

To learn if you are eligible for recovery under the WPP securities class action lawsuit, visit the case submission page here.

Disclaimer: This shareholder alert is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for personalized guidance. No specific outcomes are guaranteed.