<SEC-DOCUMENT>0001104659-12-083611.txt : 20121212
<SEC-HEADER>0001104659-12-083611.hdr.sgml : 20121212
<ACCEPTANCE-DATETIME>20121212160750
ACCESSION NUMBER:		0001104659-12-083611
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20121210
FILED AS OF DATE:		20121212
DATE AS OF CHANGE:		20121212

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Information Services Group Inc.
		CENTRAL INDEX KEY:			0001371489
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
		IRS NUMBER:				205261587
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		FOUR STAMFORD PLAZA, SUITE 512
		STREET 2:		107 ELM STREET
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902
		BUSINESS PHONE:		203-517-3100

	MAIL ADDRESS:	
		STREET 1:		FOUR STAMFORD PLAZA, SUITE 512
		STREET 2:		107 ELM STREET
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WEISSMAN ROBERT E
		CENTRAL INDEX KEY:			0001017402

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33287
		FILM NUMBER:		121259247

	MAIL ADDRESS:	
		STREET 1:		C/O COGNIZANT CORP
		STREET 2:		200 NYALA RD
		CITY:			WESTPORT
		STATE:			CT
		ZIP:			06880
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2012-12-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001371489</issuerCik>
        <issuerName>Information Services Group Inc.</issuerName>
        <issuerTradingSymbol>III</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001017402</rptOwnerCik>
            <rptOwnerName>WEISSMAN ROBERT E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TWO STAMFORD PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2>281 TRESSER BOULEVARD</rptOwnerStreet2>
            <rptOwnerCity>STAMFORD</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06901</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Shares of Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2012-12-10</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2012-12-10</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>35000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>313194</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Grant of restricted stock units which vest in 3 equal installments on each of the first, second and third anniversaries of December 10, 2012 (or earlier in the event of a change of control of ISG or such director's death or disability).</footnote>
        <footnote id="F2">Represents a grant of restricted stock units which will not vest until each of the first, second and third anniversaries of December 10, 2012 (or earlier in the event of a change of control of ISG or such director's death or disability).</footnote>
        <footnote id="F3">Includes (i) 35,000 restricted stock units which vest in three equal installments on each of the first, second and third anniversaries of December 16, 2011 (or earlier in the event of a change of control of ISG or such director's death or disability), (ii) 40,000 restricted stock units which vest in three equal installments on each of the first, second and third anniversaries of December 13, 2010 (or earlier in the event of a change of control of ISG or such director's death or disability) and (iii) 40,000 restricted stock units which vest in three equal installments on each of the first, second and third anniversaries of December 14, 2009 (or earlier in the event of a change of control of ISG or such director's death or disability).</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>David E, Berger, as Attorney-in-Fact</signatureName>
        <signatureDate>2012-12-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
