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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000916863-08-000053.txt : 20080213
<SEC-HEADER>0000916863-08-000053.hdr.sgml : 20080213
<ACCEPTANCE-DATETIME>20080213144758
ACCESSION NUMBER:		0000916863-08-000053
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070221
FILED AS OF DATE:		20080213
DATE AS OF CHANGE:		20080213

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INTEGRYS ENERGY GROUP, INC.
		CENTRAL INDEX KEY:			0000916863
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				391775292
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		130 EAST RANDOLPH DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601
		BUSINESS PHONE:		800-699-1269

	MAIL ADDRESS:	
		STREET 1:		130 EAST RANDOLPH DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Integrys Energy Group, Inc.
		DATE OF NAME CHANGE:	20070222

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WPS RESOURCES CORP
		DATE OF NAME CHANGE:	19940103

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BRODSKY WILLIAM J
		CENTRAL INDEX KEY:			0001225798

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11337
		FILM NUMBER:		08603818

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		3122404000

	MAIL ADDRESS:	
		STREET 1:		130 EAST RANDOLPH DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60601
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2007-02-21</periodOfReport>

    <dateOfOriginalSubmission>2007-02-23</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000916863</issuerCik>
        <issuerName>INTEGRYS ENERGY GROUP, INC.</issuerName>
        <issuerTradingSymbol>TEG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001225798</rptOwnerCik>
            <rptOwnerName>BRODSKY WILLIAM J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>130 E. RANDOLPH DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60601</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-02-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5790.175</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5790.175</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">In connection with the February 21, 2007, merger transaction whereby Peoples Energy Corporation became a wholly owned subsidiary of Integrys Energy Group, Inc., investments in Peoples Energy were converted to investments in Integrys Energy Group at the merger exchange ratio of .825 shares for each share of Peoples Energy.  The conversion was exempt from Section 16(b) pursuant to Rule 16b-3.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Barth J. Wolf, as Power of Attorney  For: Mr. Brodsky</signatureName>
        <signatureDate>2008-02-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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