The numbers behind the WPP whistleblower case tell a story of their own

The lawsuit between former GroupM executive Richard Foster and WPP is full of competing allegations. But buried in the court filings is a set of numbers — drawn largely from GroupM’s own internal documents — that tell a story worth understanding on its own terms.

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Here’s what the data actually shows, broken down by what it refers to.

How big GroupM was (and how it allegedly made money)

At its peak, GroupM controlled roughly $60 billion in annual client advertising spend, giving it between 20% and 50% market share in key global markets. That scale was the source of its power: the more client money it aggregated, the better the deals it could extract from media vendors.

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Ad Tech Briefing: As AI promises ‘transparency,’ more light is shed on the ad tech tax

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The great disruption promised by artificial intelligence in the media industry is predicated on using AI-driven technologies to achieve outcomes.

For the idealists out there, it’s the fulfillment of Adam Smith’s centuries-old vision of the “invisible hand” of the market, although, amid the shock of the new, there’s an even older adage: “money talks.”  

It’s likely that your social media feed reads like that of the typical Digiday-staffer, with musings on the importance of agentic technology standards, such as “Should I back Ad Context Protocol or some other standard?” 

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