<SEC-DOCUMENT>0001104659-18-015777-index.html : 20180308
<SEC-HEADER>0001104659-18-015777.hdr.sgml : 20180308
<ACCEPTANCE-DATETIME>20180308104233
ACCESSION NUMBER:		0001104659-18-015777
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20180308
DATE AS OF CHANGE:		20180308
EFFECTIVENESS DATE:		20180308

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Interactive Brokers Group, Inc.
		CENTRAL INDEX KEY:			0001381197
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33440
		FILM NUMBER:		18675438

	BUSINESS ADDRESS:	
		STREET 1:		ONE PICKWICK PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		203-618-5800

	MAIL ADDRESS:	
		STREET 1:		ONE PICKWICK PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>a18-7721_3defa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: a18-7721_3defa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g77213bci001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g77213bci001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g77213bci002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g77213bci002.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g77213bci003.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g77213bci003.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g77213bci004.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g77213bci004.gif

</DOCUMENT>
</SEC-DOCUMENT>