https://www.cnbc.com/2018/06/13/adyen-ipo-everything-you-need-to-know-about-the-8-billion-fintech-company.html > Adyen shares will begin trading on Wednesday in what will be one of Europe's largest technology initial public offerings (IPOs). > But you'd be forgiven for not knowing much about the Dutch financial technology or fintech firm as it has flown under the radar for many years.