Interactive Brokers LLC (official abbrev IB) is a United States-based discount online brokerage firm, operating on most major worldwide stock, futures, bonds, forex, and options exchanges. The company has existed for about 30 years. On its website, IB states that it has consolidated equity capital of over US $4.4 billion, and also states that IB and its affiliates exceed 1,000,000 trades per day and trade 14.1% of the global equity options volume.[1] The chief executive officer is Thomas Peterffy. Interactive Brokers is also the owner of trading company Timber Hill.
source:wikipedia