IBUK’s ultimate parent company is Interactive Brokers Group LLC, a company regulated by the Securities and Exchange Commission in the U.S.
The firm's contact details are:
Interactive Brokers (U.K.) Limited,
1 Carey Lane,
Fifth floor,
London,
EC2V 8AE,
England.
Tel: 00 44 (0) 207 776 7800
Web: www.interactivebrokers.co.uk