GroupM

Formerly the world's largest media investment company by spend, now operating as WPP Media under WPP's Elevate28 strategy

GroupM operated as the world's leading media investment group, overseeing more than $60 billion in annual media spend on behalf of clients across the globe. Launched in the early 2000s as WPP's consolidated media holding entity, it served as the parent and investment arm for some of the most recognized media agency brands in the industry, including Mindshare, Wavemaker, EssenceMediacom, mSix&Partners, T&Pm, Finecast, and the data and technology unit Choreograph. Its scale gave it unmatched leverage in media buying, audience intelligence, and cross-channel planning. Across its operational lifespan, GroupM was a dominant force in the AdTech and media ecosystem, pioneering approaches to programmatic buying, data-driven audience targeting, and cross-platform measurement. It consistently ranked as the largest buyer of media globally, giving its agency brands and their clients significant pricing advantages and access to premium inventory. GroupM also invested heavily in proprietary data infrastructure and technology through Choreograph, positioning itself at the intersection of traditional media investment and modern data science. In Q2 2025, as part of WPP CEO Cindy Rose's Elevate28 transformation strategy, GroupM was officially rebranded as WPP Media. The rebrand reflected a broader effort to more closely align the media investment group with the WPP parent brand and streamline its identity for the future. The underlying operating structure, agency brands, and capabilities carried forward under the WPP Media name, with Mindshare, EssenceMediacom, Wavemaker, T&Pm, Choreograph, and Finecast continuing to operate within the new umbrella.