    <SEC-DOCUMENT>0000352541-17-000056-index.html : 20170508
    <SEC-HEADER>0000352541-17-000056.hdr.sgml : 20170508
    <ACCEPTANCE-DATETIME>20170508154327
    ACCESSION NUMBER:		0000352541-17-000056
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20170508
    DATE AS OF CHANGE:		20170508
    EFFECTIVENESS DATE:		20170508

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-09894
    		FILM NUMBER:		17822077

    	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
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>lnt2017defa14a05-08x2017.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: lnt2017defa14a05-08x2017.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>a5935437proxymailerpage1.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: a5935437proxymailerpage1.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>a5935437proxymailerpage2.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: a5935437proxymailerpage2.gif

    </DOCUMENT>
    </SEC-DOCUMENT>