<SEC-DOCUMENT>0001127602-15-011573.txt : 20150317
<SEC-HEADER>0001127602-15-011573.hdr.sgml : 20150317
<ACCEPTANCE-DATETIME>20150317142427
ACCESSION NUMBER:		0001127602-15-011573
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20150313
FILED AS OF DATE:		20150317
DATE AS OF CHANGE:		20150317

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALLIANT ENERGY CORP
		CENTRAL INDEX KEY:			0000352541
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				391380265
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4902 NORTH BILTMORE LANE
		STREET 2:		SUITE 1000
		CITY:			MADISON
		STATE:			WI
		ZIP:			53718-2148
		BUSINESS PHONE:		608-458-3311

	MAIL ADDRESS:	
		STREET 1:		4902 NORTH BILTMORE LANE
		STREET 2:		SUITE 1000
		CITY:			MADISON
		STATE:			WI
		ZIP:			53718-2148

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTERSTATE ENERGY CORP
		DATE OF NAME CHANGE:	19980427

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WPL HOLDINGS INC
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GALLEGOS JAMES H
		CENTRAL INDEX KEY:			0001505376

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09894
		FILM NUMBER:		15705860

	MAIL ADDRESS:	
		STREET 1:		P O BOX 14720
		CITY:			MADISON
		STATE:			WI
		ZIP:			53708
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-03-13</periodOfReport>

    <issuer>
        <issuerCik>0000352541</issuerCik>
        <issuerName>ALLIANT ENERGY CORP</issuerName>
        <issuerTradingSymbol>LNT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001505376</rptOwnerCik>
            <rptOwnerName>GALLEGOS JAMES H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P O BOX 14720</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MADISON</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>53708-0720</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>Sr. V.P.-Gen. Cnsl.-Corp. Sec.</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Deferred Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2015-03-13</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2015-03-16</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>161.3219</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>60.52</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>161.3219</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>418.0759</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Units are to be settled upon reporting person's retirement.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Amy L. Cralam, by Power of Attorney</signatureName>
        <signatureDate>2015-03-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>doc1.txt
<DESCRIPTION>POWER OF ATTORNEY (PUBLIC): POA_JAMESHGALLEGOS
<TEXT>
POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS,  that the undersigned does hereby
constitute and appoint each of Amy L. Cralam, Jake C. Blavat, and Todd M.
Perrine the true and lawful agents and attorneys-in-fact of the undersigned,
with respect to all matters arising in connection with the undersigned?s
reporting obligations under Section 16(a) of the Securities Exchange Act
of 1934 (the ?Exchange Act?) as amended, and related rules and regulations,
with full power and authority to execute and deliver for and on behalf
of the undersigned all Securities and Exchange Commission Forms 3, 4, 5
and other documents in connection therewith regarding Alliant Energy
Corporation, Interstate Power and Light Company, and Wisconsin Power
and Light Company (collectively, the ?Company?) securities, as each
of said agents and attorneys-in-fact may deem advisable.  The
undersigned hereby gives each of said agents and attorneys-in-fact
full power and authority to act in the premises, and hereby ratifies and
confirms all that each of said agents and attorneys-in-fact may do by
virtue hereof.

The undersigned acknowledges that each attorney-in-fact, in serving in such
capacity at the request of the undersigned, is not assuming any of the
undersigned?s responsibilities to comply with the Exchange Act.  The
undersigned agrees to defend and hold harmless each attorney-in-fact from
and against any and all loss, damage or liability that such attorney-in-fact
may sustain as a result of any action taken in good faith hereunder.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file documents with respect to the
undersigned?s holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in writing or by
executing a new Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney on this
11th day of March, 2015.


					/s/ James H. Gallegos
					James H. Gallegos
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
