Nice article, given the year Worlpay and its underlying companies are founded, not sure this qualifies as a start-up in FinTech...also as an interesting fact Adyen is founded by the team that sold their payment business to RBS/Worldpay
Payment processing company Worldpay had London's biggest stock market listing of the year so far this week — and it's a huge moment for fintech, short for financial technology. Worldpay was valued at £4.8 billion ($7.4 billion) when shares listed on Tuesday, and the stock price popped over 3% on the opening day. The reception of the listing could cement London's reputation as the fintech capital of Europe, if not the world. If London can prove its public markets "get" fintech it could herald a wave of floats here. 'We expect to see more multibillion-dollar events' Worldpay's listing coincides with a bit of a "moment" for fintech. The sector has become the latest hot area for venture capital investment, with money pouring into everything from peer-to-peer lending marketplaces (Funding Circle, Prosper) to bond market technology (Algomi).
http://uk.businessinsider.com/what-worldpays-ipo-means-for-fintech-2015-10