Interactive Brokers LLC. Is a member NYSE - FINRA - SIPC and regulated by the US Securities and Exchange Commission and the Commodity Futures Trading Commission. Headquarters: One Pickwick Plaza, Greenwich, CT 06830 USA Website: www.interactivebrokers.com Interactive Brokers Canada Inc. Is a member of the Investment Industry Regulatory Organization of Canada (IIROC) and Member - … Interactive Brokers LLC. Is a member NYSE - FINRA - SIPC and regulated by the US Securities and Exchange Commission and the Commodity Futures Trading Commission. Headquarters: One Pickwick Plaza, Greenwich, CT 06830 USA Website: www.interactivebrokers.com. Interactive Brokers Canada Inc.