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Interactive Brokers Group, Inc. (commonly known as Interactive Brokers or IBKR) is an American multinational brokerage and financial services company headquartered in Greenwich, Connecticut. Through its subsidiaries, it provides automated trade execution and custody services for stocks, options, futures, foreign exchange, bonds, funds and other products on electronic markets worldwide. Its services include direct market access, clearing, securities lending, margin lending and prime brokerage. As of June 30, 2026, the company had 5.185 million customer accounts and $930.3 billion in customer equity; customer daily average revenue trades (DARTs) averaged 4.824 million during the second quarter of 2026. It provides access to more than 170 markets and serves customers in more than 200 countries and territories.