<SEC-DOCUMENT>0001340807-18-000004-index.html : 20180214
<SEC-HEADER>0001340807-18-000004.hdr.sgml : 20180214
<ACCEPTANCE-DATETIME>20180214160416
ACCESSION NUMBER:		0001340807-18-000004
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180214
DATE AS OF CHANGE:		20180214

SUBJECT COMPANY:	

	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:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-82876
		FILM NUMBER:		18612139

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Bares Capital Management, Inc.
		CENTRAL INDEX KEY:			0001340807
		IRS NUMBER:				742961140
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		12600 HILL COUNTRY BLVD
		STREET 2:		SUITE R-230
		CITY:			AUSTIN
		STATE:			TX
		ZIP:			78738
		BUSINESS PHONE:		512-542-1083

	MAIL ADDRESS:	
		STREET 1:		12600 HILL COUNTRY BLVD
		STREET 2:		SUITE R-230
		CITY:			AUSTIN
		STATE:			TX
		ZIP:			78738
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>ibkr.13G.txt
<TEXT>
Document 1 - file: ibkr.13G.txt

</DOCUMENT>
</SEC-DOCUMENT>