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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001140361-08-022793.txt : 20081007
<SEC-HEADER>0001140361-08-022793.hdr.sgml : 20081007
<ACCEPTANCE-DATETIME>20081007120321
ACCESSION NUMBER:		0001140361-08-022793
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20081003
FILED AS OF DATE:		20081007
DATE AS OF CHANGE:		20081007

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RiskMetrics Group Inc
		CENTRAL INDEX KEY:			0001295172
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		IRS NUMBER:				000000000

	BUSINESS ADDRESS:	
		STREET 1:		ONE CHASE MANHATTAN PLAZA
		STREET 2:		44TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10005
		BUSINESS PHONE:		212-981-7475

	MAIL ADDRESS:	
		STREET 1:		ONE CHASE MANHATTAN PLAZA
		STREET 2:		44TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10005

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LEVITT ARTHUR JR
		CENTRAL INDEX KEY:			0001198082

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33928
		FILM NUMBER:		081111626

	BUSINESS ADDRESS:	
		STREET 1:		RIVERSTONE HOLDINGS LLC
		STREET 2:		ONE GREENICH OFFICE PARK
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06831
		BUSINESS PHONE:		203 413 2279

	MAIL ADDRESS:	
		STREET 1:		RIVERSTONE HOLDINGS
		STREET 2:		ONE GREENICH OFFICE PARK
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06831
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-10-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001295172</issuerCik>
        <issuerName>RiskMetrics Group Inc</issuerName>
        <issuerTradingSymbol>RMG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001198082</rptOwnerCik>
            <rptOwnerName>LEVITT ARTHUR JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O RISKMETRICS GROUP, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>ONE CHASE MANHATTAN, PLAZA, 44TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10005</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, Par Value $0.01</value>
            </securityTitle>
            <transactionDate>
                <value>2008-10-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>506</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19433</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Steven Friedman, by power of attorney</signatureName>
        <signatureDate>2008-10-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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