The remaining co-head of ICAP's flagship electronic currencies-trading platform has left the firm amid a shake-up of the business, following the exit of the other co-head earlier this week.

John Schoen, who was named co-head of EBS Market in March 2013 along with Nichola Hunter, told executives at ICAP this week of his plans to depart. Hunter left London-based ICAP earlier this week, The Wall Street Journal reported on Tuesday, citing people with knowledge of the departure.