Interactive Brokers LLC is an American multinational brokerage firm. It operates the largest electronic trading platform in the U.S. by number of daily average revenue trades. The company brokers stocks, options, futures, EFPs, futures options, forex, bonds, and funds. The company is headquartered in Greenwich, Connecticut and has offices in four cities. It is the largest subsidiary of the brokerage group Interactive Brokers Group, Inc., which was founded by Chairman Thomas Peterffy, an early innovator in computer-assisted trading. IB is regulated by the U.S. Securities and Exchange Commission, the Financial Industry Regulatory Authority, the New York Stock Exchange, the Commodity Futures Trading Commission, National Futures Association, Chicago Mercantile Exchange and other self-regulatory organizations. The company is a provider of fully disclosed, omnibus, and non-disclosed broker accounts and provides correspondent clearing services to 200 introducing brokers worldwide. The company serves 607,000 client brokerage accounts, with US$128.4 billion in customer equity. Interactive Brokers Group owns 40 percent of the futures exchange OneChicago, and is an equity partner and founder of the Boston Options Exchange.