Sir Martin Sorrell

Sorrell privately invested in Wire and Plastic Products (WPP) in 1985, a British wire shopping cart maker, joining the company a year later. He began to acquire "below-the-line" advertising-related companies including major coups such as his $566 million "hostile" takeover of J. Walter Thompson Co. and $825 million acquisition of Ogilvy & Mather.

Today, he leads one of the world's largest marketing service/advertising group with more than 40 companies in 83 nations.