WPP plc

World's largest advertising and communications holding company by revenue and media billings

WPP plc is the world's largest advertising holding company, headquartered in London, UK. Founded through Martin Sorrell's acquisition of Wire and Plastic Products in 1985 and transformed into a global communications powerhouse through decades of strategic acquisitions, WPP today encompasses some of the most recognized agency brands in the world, including Ogilvy, GroupM, VMLY&R, Wunderman Thompson, Grey, and Mindshare. The company provides an integrated suite of services spanning creative advertising, media planning and buying, public relations, data analytics, and marketing technology to many of the world's largest brands across virtually every industry sector. In the AdTech ecosystem, WPP holds a uniquely powerful position through its media investment arm GroupM, which is the world's largest media buying entity, responsible for approximately $60 billion in annual media spend. WPP has made significant investments in data and technology capabilities, including its Choreograph data platform and partnerships with major technology platforms such as Google, Meta, Amazon, and Salesforce. The company has also developed proprietary tools for audience intelligence, campaign measurement, and marketing effectiveness to help clients navigate an increasingly complex and fragmented media landscape. WPP serves clients across more than 100 countries and employs approximately 100,000 people globally following a period of strategic consolidation and restructuring initiated under CEO Mark Read, who took over in 2018. The company has been actively simplifying its portfolio — merging agencies, divesting non-core assets, and investing in AI and technology capabilities — to remain competitive against both traditional holding company rivals like Publicis Groupe, Omnicom, and IPG, as well as emerging threats from management consultancies and independent digital agencies.