<SEC-DOCUMENT>0000352541-17-000058.txt : 20170522
<SEC-HEADER>0000352541-17-000058.hdr.sgml : 20170522
<ACCEPTANCE-DATETIME>20170522104842
ACCESSION NUMBER:		0000352541-17-000058
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170519
FILED AS OF DATE:		20170522
DATE AS OF CHANGE:		20170522

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:			Dunie Deborah B.
		CENTRAL INDEX KEY:			0001634573

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09894
		FILM NUMBER:		17859996

	MAIL ADDRESS:	
		STREET 1:		1710 SAIC DRIVE
		CITY:			MCLEAN
		STATE:			VA
		ZIP:			22102
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_149546450790703.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-05-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001634573</rptOwnerCik>
            <rptOwnerName>Dunie Deborah B.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALLIANT ENERGY CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>PO BOX 14720</rptOwnerStreet2>
            <rptOwnerCity>MADISON</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>53708-0720</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</value>
            </securityTitle>
            <transactionDate>
                <value>2017-05-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>39.6123</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11050</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The reported price is a weighted average sale price. These shares were purchased in multiple transactions at prices ranging from $39.61 to $39.6153. The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares purchased at each separate price within the range.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jake C. Blavat, Attorney-in-Fact</signatureName>
        <signatureDate>2017-05-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa_duniedeborah.htm
<DESCRIPTION>DEBORAH DUNIE POA
<TEXT>
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<pre>
POWER OF ATTORNEY                    Exhibit 24



    KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned does
 hereby constitute and appoint each of James H. Gallegos, Wenyu T. Blanchard, 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
6th day of February, 2017.


                            /s/ Deborah B. Dunie
                            Deborah B. Dunie



</pre>
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