Sir Martin Sorrell is Founder and Executive Chairman of S4Capital plc, the tech-led, new age/new era digital advertising, marketing and technology services company he established in 2018.

In 2018, S4 combined with MediaMonks and MightyHive, which have since merged with over 25 companies. In 2021, the organisation integrated into Media.Monks, the digital-first operating brand that connects content, data&digital media and technology services across one global team in 32 countries. 

Sir Martin was CEO of WPP for 33 years, building it from a £1 million ‘shell’ company in 1985 into the world's largest advertising and marketing services company, with a market capitalisation of over £16 billion the day he left. Previously, he was Group Financial Director of Saatchi & Saatchi Company Plc.

He has been nominated as one of the TIME 100: The Most Influential People and received the Harvard Business School Alumni Achievement Award.