International client accounts are custodied and securities cleared through Interactive Brokers (IBKR).
"Interactive Brokers Group, Inc. was founded by its Chairman Thomas Peterffy. Over the last 43 years, it has grown internally to become one of the premier securities firms with over $10.01 billion in equity capital.
Interactive Brokers conducts its broker/dealer business on over 135 market destinations worldwide. In its broker dealer agency business, IBKR provides direct access ("on line") trade execution and clearing services to institutional and professional traders for a wide variety of electronically traded products including stocks, options, futures, forex, fixed income and funds worldwide. Interactive Brokers Group and its affiliates execute over 2,229,000 trades per day.
Interactive Brokers is headquartered in Greenwich, Connecticut and has 2,400+ employees in its offices in the USA, Switzerland, Canada, Hong Kong, UK, Australia, Hungary, Russia, Japan, India, China, Luxembourg, Singapore, Ireland and Estonia. IBKR is regulated by the SEC, FINRA, NYSE, FCA and other regulatory agencies around the world.”