<SEC-DOCUMENT>0001381197-19-000081-index.html : 20191007
<SEC-HEADER>0001381197-19-000081.hdr.sgml : 20191007
<ACCEPTANCE-DATETIME>20191007160928
ACCESSION NUMBER:		0001381197-19-000081
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20191007
DATE AS OF CHANGE:		20191007

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:				300390693
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-219552
		FILM NUMBER:		191140997

	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>424B5
<SEQUENCE>1
<FILENAME>ibkr-424b5_20191001.htm
<DESCRIPTION>PROSPECTUS SUPPLEMENT
<TEXT>
Document 1 - file: ibkr-424b5_20191001.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>image1-diagram.jpg
<TEXT>
Document 2 - file: image1-diagram.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>image1.jpg
<TEXT>
Document 3 - file: image1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>image3.jpg
<TEXT>
Document 4 - file: image3.jpg

</DOCUMENT>
</SEC-DOCUMENT>