"

 Please check your source 

Using just the companies website: you'll find ""Interactive Brokers Inc. (now known as IB LLC) is incorporated as a US broker-dealer, making Timber Hill's vast intercontinental electronic network and trade execution services available to customers."" cause for both of my edits would be supported by the citation you referenced, but they use the date 1993. Independent sources use the date 1994. 75.49.223.52  "