Interactive Brokers Group, Inc. — Director's Dealing 2012

Feb 9, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Interactive Brokers Group, Inc. (IBKR)
CIK: 0001381197
Period of Report: 2012-02-07

Reporting Person: Galik Milan (Director, SVP Software Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-07	Class A Common Stock	S	749	$15.10	Disposed	877435	Direct
2012-02-07	Class A Common Stock	S	51	$15.18	Disposed	877384	Direct
2012-02-08	Class A Common Stock	S	800	$15.18	Disposed	876584	Direct

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 23, 2012.

F2: These shares represent the aggregate number of shares of restricted stock from awards granted on May 9, 2007 and annually thereafter, starting December 31, 2007 through December 31, 2011, including a special one-time grant on January 6, 2012, less vested shares that were sold for withholding tax purposes and vested shares sold pursuant to a Rule 10b5-1 trading plan.