WPP

World's largest advertising and marketing services company by revenue

WPP plc is a multinational communications, advertising, public relations, technology, and commerce holding company headquartered in London. Founded in 1985 by Martin Sorrell, WPP has grown through strategic acquisitions to become the world's largest advertising company by revenue. The company operates through a portfolio of renowned agencies including GroupM (media investment), Ogilvy, VMLY&R, Wunderman Thompson, Grey, and others. WPP serves clients across all major industries through integrated services spanning advertising, media planning and buying, data analytics, public relations, branding, and digital transformation. The company has invested heavily in technology and data capabilities, developing proprietary platforms and tools to deliver data-driven marketing solutions. WPP's global network spans over 100 countries with thousands of offices worldwide. In the AdTech ecosystem, WPP plays a significant role as both a major buyer of advertising inventory through GroupM and as a developer of marketing technology solutions. The company has been transforming its business model to focus on integrated creative and technology offerings, competing with traditional holding companies as well as consulting firms entering the marketing space.