SumUp’s valuation falls as low as $4.1B, as Groupon and others sell off their stakes

Adyen lost $13 billion in market cap last month when investors scrambled to sell shares after the payments company missed quarterly revenue targets. But it’s not the only one facing the music in fintech. Shares in SumUp, a privately-held European payment technology business that focuses on point-of-sale transactions, are currently are being sold in inside […]