S4 Capital plc is a digital advertising and marketing services company that was founded by Sir Martin Sorrell in 2018. The company provides a range of services including digital content creation, media planning and buying, data analytics, and programmatic advertising. S4 Capital operates globally with offices in over 30 countries, serving clients such as Google, Facebook, and Procter & Gamble. The company is listed on the London Stock Exchange and has a market capitalization of over ÂŁ4 billion. S4 Capital’s mission is to disrupt the traditional advertising industry by providing faster, better, and cheaper services to clients through its digital-first approach.