<SEC-DOCUMENT>0001567619-20-020215.txt : 20201123
<SEC-HEADER>0001567619-20-020215.hdr.sgml : 20201123
<ACCEPTANCE-DATETIME>20201123162153
ACCESSION NUMBER:		0001567619-20-020215
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20201119
FILED AS OF DATE:		20201123
DATE AS OF CHANGE:		20201123

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Brody Paul Jonathan
		CENTRAL INDEX KEY:			0001391403

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33440
		FILM NUMBER:		201337639

	MAIL ADDRESS:	
		STREET 1:		ONE PICKWICK PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

ISSUER:		

	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

	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>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-11-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001381197</issuerCik>
        <issuerName>Interactive Brokers Group, Inc.</issuerName>
        <issuerTradingSymbol>IBKR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001391403</rptOwnerCik>
            <rptOwnerName>Brody Paul Jonathan</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE PICKWICK PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06830</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-19</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2533</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>53.28</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>226064</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by PJB Holdings LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-19</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>25</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>53.64</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>226039</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by PJB Holdings LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-20</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2558</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>53.17</value>
                    <footnoteId id="F5"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>223481</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by PJB Holdings LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>651568</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by PJB Holdings LLC, which is owned indirectly by the Reporting Person.</footnote>
        <footnote id="F2">Represents number of securities owned by PJB Holdings LLC, which is owned indirectly by the Reporting Person.</footnote>
        <footnote id="F3">This amount includes (a) Class A common stock attributable to vested restricted stock units that were awarded under the amended 2007 Stock Incentive Plan (&quot;Plan&quot;) and (b) unvested restricted stock units that were awarded under the Plan.</footnote>
        <footnote id="F4">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.64 to $53.63. The Reporting Person undertakes to provide Interactive Brokers Group, Inc. (the &quot;Company&quot;), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the ranges set forth in footnotes (4) - (5) to this Form 4.</footnote>
        <footnote id="F5">The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.85 to $53.58.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Raymond Bussiere as authorized signatory for Paul J. Brody</signatureName>
        <signatureDate>2020-11-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.1
<SEQUENCE>2
<FILENAME>poa-pb_20201112.htm
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
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    <div style="text-align: center; font-weight: bold;">POWER OF ATTORNEY</div>

    <div><br>
       </div>

    <div style="text-align: justify; font-size: 12pt;"><font style="font-size: 11pt;">&#160;&#160;&#160; Know all by these presents, that the undersigned hereby constitutes and appoints each of, Raymond P. Bussiere, Denis Mendonca, and Michael Sellitto</font><font style="font-size: 11pt;">&#160;each of them individually, the undersigned's true and lawful attorney-in-fact to:</font></div>

    <div><br>
       </div>

    <div style="text-align: justify;">1) prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID, including amendments thereto, and any
      other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section 16(a) of the Securities Exchange Act of 1934 or any rule or regulation of the SEC;</div>

    <div><br>
       </div>

    <div style="text-align: justify;">2) execute for and on behalf of the undersigned, in the undersigned's capacity as an officer and/or director of Interactive Brokers Group, Inc.&#160; (the "Company"), Forms 3, 4, and 5 in accordance with
      Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder, and any other forms or reports the undersigned may be required to file in connection with the undersigned's ownership, acquisition, or disposition of securities of the
      Company;</div>

    <div><br>
       </div>

    <div style="text-align: justify;">3) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4, or 5, or other form or report, and timely file
      such form or report with the United States Securities and Exchange Commission and any stock exchange or similar authority; and</div>

    <div><br>
       </div>

    <div style="text-align: justify;">4) take any other action or any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by,
      the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may
      approve in such attorney-in-fact's discretion.</div>

    <div style="text-align: justify; font-size: 10pt;"> <font style="font-size: 11pt;"><br>
      </font> </div>

    <div style="text-indent: 13.5pt;">The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary or proper to be done in the exercise
      of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such
      attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted.&#160; The undersigned acknowledges that the foregoing
      attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.</div>

    <div style="text-indent: 13.5pt; font-size: 10pt;"> <font style="font-size: 11pt;"><br>
      </font> </div>

    <div style="text-indent: 13.5pt;">This Power of Attorney supersedes and replaces any prior instruments executed by the undersigned which grant a power of attorney to any person in connection with the subject matter of this Power of
      Attorney, and any authority granted pursuant to any such prior power of attorney is hereby revoked effective as of the date hereof.&#160; This revocation shall not affect the validity of any act properly carried out by my lawfully appointed
      attorneys-in-fact prior to the date hereof.</div>

    <div style="text-indent: 13.5pt; font-size: 10pt;"> <font style="font-size: 11pt;"><br>
      </font> </div>

    <div style="text-indent: 13.5pt;">This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and transactions in
      securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.</div>

    <div><br>
       </div>

    <div>&#160;&#160;&#160;&#160;IN WITNESS THEREOF, the undersigned has caused this Power of Attorney to be executed as of this 12<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">th</sup> day of November 2020.</div>

    <div><br>
       </div>

    <div><br>
       </div>

    <div><br>
       </div>

    <div><u>/s/ Paul Brody &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <br>
      </u></div>

    <div>Paul J. Brody<br>
    </div>

    <div style="margin-top: 12pt; margin-bottom: 12pt; font-size: 10pt;"> <font style="font-size: 11pt;"><br>
      </font> </div>

    <div style="margin-top: 12pt; margin-bottom: 12pt;">STATE OF CONNECTICUT<br>
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</div>

    <div style="text-indent: 36pt; margin-left: 108pt; margin-top: 12pt; margin-bottom: 12pt;">ss: at Greenwich on <u>November 16</u>, 2020</div>

    <div style="margin-top: 12pt; margin-bottom: 12pt; font-size: 10pt;"><font style="font-size: 11pt;">COUNTY OF&#160;&#160; <u>Fairfield &#160; &#160; &#160; &#160;&#160;</u> &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <br>
      </font> </div>

    <div>Personally Appeared&#160;<u> Paul Brody </u>, Signer and Sealer of the foregoing instrument, and acknowledged the same to be his/her free act and deed, before me.&#160;</div>

    <div style="margin-top: 12pt; margin-bottom: 12pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<u><font style="display: inline-block; text-indent: 0px; width: 180pt;" id="TRGRRTFtoHTMLTab">
          </font>/s/ Katie Robustelli &#160;&#160;&#160;&#160;&#160;&#160;&#160; <br>
        </u></div>

    <div>&#160; &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<font style="display: inline-block; text-indent: 0px; width: 216pt;" id="TRGRRTFtoHTMLTab"> </font>Notary Public&#160;&#160; <br>
        <br>
       </div>

    <div style="text-indent: 36pt; margin-left: 144pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; &#160; My commission expires: May 31, 2024<br>
      &#160;</div>

    <div><br>
    </div>
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