GREENWICH, Conn.--(BUSINESS WIRE)--Interactive Brokers Group, Inc. (NASDAQ GS: IBKR) announces that its Chairman and Chief Executive Officer Thomas Peterffy will speak at the Sandler O’Neill Global Exchange and Brokerage Conference on Wednesday, June 3rd at 8:30 a.m. EDT. Mr. Peterffy's presentation can be heard live via webcast on the Internet accessible from the company's web site, www.interactivebrokers.com/ir. Participants should log in approximately 10 minutes prior to the start of the pre