<SEC-DOCUMENT>0001127602-15-017934.txt : 20150520
<SEC-HEADER>0001127602-15-017934.hdr.sgml : 20150520
<ACCEPTANCE-DATETIME>20150520140429
ACCESSION NUMBER:		0001127602-15-017934
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20150515
FILED AS OF DATE:		20150520
DATE AS OF CHANGE:		20150520

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:			MCALLISTER SINGLETON B
		CENTRAL INDEX KEY:			0001209079

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09894
		FILM NUMBER:		15879083

	MAIL ADDRESS:	
		STREET 1:		427 WALKER ROAD
		CITY:			GREAT FALLS
		STATE:			VA
		ZIP:			22066
</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>2015-05-15</periodOfReport>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001209079</rptOwnerCik>
            <rptOwnerName>MCALLISTER SINGLETON B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PO BOX 14720</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MADISON</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>53708-0720</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6369.49</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Deferred Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2015-05-15</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2015-05-18</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>80.9791</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>61.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>80.9791</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9062.3123</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Includes shares acquired under the company's dividend reinvestment plan, pursuant to a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.</footnote>
        <footnote id="F2">Units are to be settled upon reporting person's retirement.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Amy L. Cralam, by Power of Attorney</signatureName>
        <signatureDate>2015-05-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>doc1.txt
<DESCRIPTION>POWER OF ATTORNEY (PUBLIC): MCALLISTER POA
<TEXT>
POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS,  that the undersigned does hereby
constitute and appoint each of James H. Gallegos, Amy L. Cralam, and
Jake C. Blavat 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/ Singleton B. McAllister
					Singleton B. McAllister
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
