WPP plc (LSE: WPP, NASDAQ: WPPGY) is a global advertising agency company with its main management office in London, United Kingdom, and its registered and executive office in Dublin, Ireland. It is the world's largest advertising group by revenues, and employs over 150,000 people in 2,400 offices in 107 countries. It owns a number of advertising, public relations and market research networks, including Grey, Burson-Marsteller, Hill & Knowlton, JWT, Ogilvy Group, TNS and Young & Rubicam. The company is well known for going to great lengths to lower its own corporate tax bill, paying only 1.6% of total revenue in taxes in 2010.

Its primary listing is on the London Stock Exchange and it is a constituent of the FTSE 100 Index. It has a secondary listing on NASDAQ.

Wire and Plastic Products plc was founded in 1971 as a manufacturer of wire shopping baskets. In 1985 Martin Sorrell, searching for a listed company through which to build a worldwide marketing services company, bought a controlling stake of just under 30% at a cost of $676,000. Sorrell had been the financial director for the advertising agency Saatchi & Saatchi from 1977 to 1985, managing its takeovers of companies in the US and the UK. The holding company was renamed WPP Group and in 1987 Sorrell became its chief executive.