Why he started WPP and S4 Capital, how S4 Capital has been able to weather the current storm and the enduring impacts on the marketing agency model
Sir Martin is a British businessman and the founder of WPP plc, the world's largest advertising and PR group.
Upon his retirement in April 2018, Sorrell was the longest-serving chief executive of a FTSE 100 company.
Thereafter he launched S4 Capital. Two years later, it is worth £2bn.