<SEC-DOCUMENT>0000913760-22-000097.txt : 20220610
<SEC-HEADER>0000913760-22-000097.hdr.sgml : 20220610
<ACCEPTANCE-DATETIME>20220610161151
ACCESSION NUMBER:		0000913760-22-000097
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220608
FILED AS OF DATE:		20220610
DATE AS OF CHANGE:		20220610

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Nguyen Xuong
		CENTRAL INDEX KEY:			0001575484

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36045
		FILM NUMBER:		221008989

	MAIL ADDRESS:	
		STREET 1:		230 SOUTH LASALLE
		STREET 2:		SUITE 10-500
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60604

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			StoneX Group Inc.
		CENTRAL INDEX KEY:			0000913760
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY & COMMODITY BROKERS, DEALERS, EXCHANGES & SERVICES [6200]
		IRS NUMBER:				592921318
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		230 PARK AVE
		STREET 2:		10TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10169
		BUSINESS PHONE:		212-485-3500

	MAIL ADDRESS:	
		STREET 1:		230 PARK AVE
		STREET 2:		10TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10169

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTL FCSTONE INC.
		DATE OF NAME CHANGE:	20110302

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTERNATIONAL ASSETS HOLDING CORP
		DATE OF NAME CHANGE:	19931020
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_165489189389064.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-06-08</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000913760</issuerCik>
        <issuerName>StoneX Group Inc.</issuerName>
        <issuerTradingSymbol>SNEX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001575484</rptOwnerCik>
            <rptOwnerName>Nguyen Xuong</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>230 SOUTH LASALLE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 10-500</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60604</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Operating Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2022-06-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4037</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>80.4511</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>65236</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The price reported represents an average price.  The Reporting Person will provide to the Commission, the issuer and any stockholder, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F2">Share total revised as a non-material correction to accurately reflect holdings in Mr. Nguyen's personal 401(k) account.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Xuong Nguyen</signatureName>
        <signatureDate>2022-06-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
