On Tuesday, Worldpay, the payments processor priced its IPO at £2.40/share ($3.69), giving it a market value of £4.8b and making it the biggest U.K. IPO in 2015. On the first day of trading shares rose 2.5% above the IPO price. Worldpay was priced at 16x enterprise value to EBTIDA. This is quite rich in comparison to its US comps Vantiv and First Data which trade at 12.5x and less than 12x respectively.