Interactive Brokers Group Changes Fourth Quarter Earnings Conference Call

GREENWICH, CT, January 21, 2009 — Interactive Brokers Group, Inc. (NASDAQ: IBKR) plans to announce its fourth quarter 2008 financial results on Thursday, January 22, 2009, in a release that will be issued at 7:00 am instead of 4:00 pm (ET). The press release will also be available on the company's web site,

In addition, a conference call to discuss the company's results will be held at 4:30 pm instead of 5:30 pm (ET) on that day, January 22. The call will be open to the public.

Members of the public who would like to listen to the conference call should dial 800-390-5360 (U.S. domestic) and 719-785-1753 (international). The number should be dialed approximately ten minutes prior to the start of the conference call. The conference call will also be accessible as an audio webcast through the Investor Relations section of the Interactive Brokers web site,

About Interactive Brokers Group:

Interactive Brokers Group, Inc., together with its subsidiaries, is an automated global electronic market maker and broker specializing in routing orders and executing and processing trades in securities, futures, foreign exchange instruments, bonds and funds on more than 70 electronic exchanges and trading venues around the world. The company provides professional traders and investors with direct access to stocks, options, futures, forex, bonds and mutual funds from a single IB Universal AccountSM. Employing proprietary software on electronic exchanges worldwide, Interactive Brokers is continuously integrating its software with a growing number of exchanges and trading venues into one automatically functioning, computerized platform that requires minimal human intervention.

For Interactive Brokers Group, Inc. Media: Andrew Wilkinson, 203-913-1369 or Investors: Deborah Liston 203-618-4070.