John Caspers

Mr Caspers is the latest billionaire to emerge from the company, which also counts Spotify Technology and eBay among its customers. Although no longer involved in Adyen's daily operations, Mr Caspers said in an e-mail that he remains active by engaging investors and regularly speaking with his fellow co-founders. He still holds a 4.65 per cent stake worth US$1 billion. He also netted more than 30 million euros (S$46.4 million) in Adyen's offering, Europe's largest last year for a tech company.