The Erosion of an Empire: Inside the Internal Crisis Gripping WPP

By Seb Joseph | August 17, 2026

WPP, once the undisputed titan of the advertising holding company world, is currently navigating a period of profound institutional instability. While the company’s decline from its position of supremacy has been a subject of industry speculation for years, a new, granular picture of its internal struggles has finally emerged.

These revelations are not mere rumors; they are codified in a consolidated securities class action lawsuit filed in the Southern District of New York. The suit, brought on behalf of investors who purchased WPP American Depository Receipts between March 2024 and October 2025, names former CEO Mark Read, CFO Joanne Wilson, and WPP Media global CEO Brian Lesser as key defendants. Perhaps most damaging are the testimonies of thirteen former WPP executives, who paint a picture of a company trapped between failed structural ambitions, technological obsolescence, and a culture of questionable financial practices.

The Foundation of the Allegations

The securities class action draws significant corroborating strength from a separate, high-profile wrongful termination suit brought by former WPP executive Richard Foster. Foster alleges that he was summarily dismissed after raising internal alarms regarding what he characterized as an improper "kickback" operation within the group’s media investment arm.

While the testimonies cited in the securities case were gathered independently of the Foster litigation, the two legal threads have become inextricably linked. Together, they suggest a systemic failure of governance and transparency. The complaint alleges that WPP’s leadership knowingly misled shareholders about the efficacy of its transformation efforts while simultaneously failing to address the ethical and operational rot within its media buying divisions.

A Chronology of Stagnation and Misstep

To understand the current crisis, one must look at the timeline of WPP’s promised, yet ultimately elusive, transformation.

2024: The Year of Empty Promises

As of April 2024, internal accounts from a former GroupM CFO suggest that the company’s long-touted "simplification" effort had hit a wall. Rather than achieving the streamlined operational efficiency promised to the market, the company engaged in widespread employee terminations that, according to insiders, served only to complicate existing workflows.

The strategy, as described by those on the inside, was a paradoxical attempt to "milk the cash cow" while aggressively slashing the headcount required to maintain it. Executives estimate that these misguided cost-cutting measures effectively pushed the company’s projected return to growth back by two to three years.

Early 2025: The Abandonment of Infrastructure

By March 2025, the internal mood had shifted from frustration to resignation. A former transformation project manager, who joined GroupM in 2024, noted that the enterprise resource planning (ERP) system—designed to unify the company’s fragmented finance systems—was effectively abandoned. The project team was gutted; key managers were fired in early April, and the complex task was left in the hands of a low-level assistant. "They just gave up," the executive recalled.

Late 2025: The Regulatory and Legal Climax

The crisis reached a boiling point in late 2025 as the Foster lawsuit went public and the subsequent securities class action began to unearth discovery documents. This period saw the revelation that major clients, including Sony, had begun conducting their own forensic investigations into WPP’s rebate practices, leading to a massive loss of institutional trust.

The Data Gap: Choreograph and the "WPP Shut" System

Central to WPP’s pitch in recent years has been its data platform, Choreograph. However, the internal reality appears to have been vastly different from the external marketing narrative.

A former senior vice president of data and technology at EssenceMediacom described WPP’s underlying dataset as "sparse" compared to competitors like Publicis’s Epsilon. The executive claimed that WPP was effectively five years behind the industry curve. This technological lag was not lost on clients; a CMO at Signet Jewelers reportedly told a WPP executive that the agency’s data capabilities were a "major concern," and that the only reason they were still in the room was because they were "the only choice." Signet ultimately moved their account to Publicis in April 2023.

The launch of "WPP Open," the company’s AI-powered operating system, was intended to rectify these perceptions. Instead, it became a point of ridicule. A former programmatic lead described an internal demo where the AI failed to correctly identify audience personas, instead producing results related to Japanese anime fans when queried about a pop star’s American fanbase. Furthermore, the platform was pitched to clients as a collaborative dashboard, but in reality, functioned only as an internal tool inaccessible to the very clients it was supposed to serve. As one insider quipped, "It should be called ‘WPP Shut.’"

The Cost of Transparency: The Sony Investigation

Perhaps the most damning evidence regarding WPP’s financial practices involves its 15th-largest client, Sony. According to the amended complaint in the Foster case, Sony conducted an exhaustive investigation into WPP’s rebate practices, even sending representatives to observe a criminal trial in China involving WPP executives.

Sony’s findings were stark: they identified a "broker model" in China where WPP negotiated rebates with vendors and routed the funds through 47 shell-like brokers. This process effectively warehoused the money before it could be funneled into WPP’s profit margins. Sony’s data showed that in 2024 alone, $350 million was retained by WPP, while only $110 million reached the client. When Sony confronted WPP’s legal representatives with evidence that their "80% discounts" on media were funded by these opaque "black box" rebates, the WPP representatives reportedly claimed they had "no answer" because they did not want to "know the answer."

Corporate Response and Official Stance

WPP has maintained a posture of staunch denial regarding the allegations. In an email to stakeholders, the company addressed the updated complaint from Richard Foster’s legal team:

"This amended complaint, filed just prior to the hearing, is an attempt to avoid its dismissal. Both complaints are baseless and without merit, and WPP will be re-filing an updated motion to dismiss. We have confidence that this matter will be resolved through due legal process."

Conversely, William A. Brewer III, lead counsel for Richard Foster, remains defiant. "Richard Foster asked a question any agency should be prepared to answer: Are your profits derived from loyal service to your clients, or not? When Mr. Foster concluded that defendants did not have honest answers to that question, he informed the CEO—and was summarily fired."

The Wider Implications for the Agency Model

The fallout from these events has been a steady exodus of high-value clients, including Coca-Cola, Mars, PayPal, TJX, Abbott Labs, and Paramount. The insiders interviewed for this report suggest that WPP’s leadership was never in the dark about these departures. Former CEO Mark Read reportedly traveled to Atlanta to personally lobby Coca-Cola, and other C-suite executives maintained constant contact with Uber’s CFO, with the firm’s future retention of the account reportedly "riding on that relationship."

The implications for the broader advertising holding company model are severe. If a company of WPP’s scale can be shown to have prioritized opaque profit-taking over client transparency, the fundamental contract between agencies and brands is at risk.

For shareholders, the "transformation" narrative—a staple of holding company quarterly earnings calls—is now under intense scrutiny. As the court proceedings in the Southern District of New York continue, the industry is watching to see whether this represents a singular case of institutional failure or a symptom of a business model that has become fundamentally disconnected from the needs of the modern, data-driven marketer.

For now, the "administrative nightmare" described by former employees serves as a sobering case study on the dangers of corporate inertia and the high price of losing client trust.