UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 orOR 15(d) of The Securities Exchange Act of 1934

~~the~~Date ~~Securities~~of ~~Exchange~~Report ~~Act~~(Date of ~~1934~~ earliest event reported) July 31, 2015

Date of Report (Date of earliest event reported): May 9, 2013



Commission	Name of Registrant, State of Incorporation,	IRS Employer
File Number	Address of Principal Executive Offices and Telephone Number	Identification Number
1-9894	ALLIANT ENERGY CORPORATION	39-1380265
	(a Wisconsin corporation)
	4902 N. Biltmore Lane
	Madison, Wisconsin 53718
	Telephone (608)458-3311

1-4117	INTERSTATE POWER AND LIGHT COMPANY	42-0331370
	(an Iowa corporation)
	Alliant Energy Tower
	Cedar Rapids, Iowa 52401
	Telephone (319)786-4411

0-337	WISCONSIN POWER AND LIGHT COMPANY	39-0714890
	(a Wisconsin corporation)
	4902 N. Biltmore Lane
	Madison, Wisconsin 53718
	Telephone (608)458-3311

Commission File Number	Name of Registrant, State of Incorporation, Address of Principal Executive Offices and Telephone Number	IRS Employer Identification Number
1-9894	Alliant Energy Corporation (a Wisconsin corporation) 4902 N. Biltmore Lane Madison, Wisconsin 53718 Telephone (608) 458-3311	39-1380265
1-4117	Interstate Power and Light Company (an Iowa corporation) Alliant Energy Tower Cedar Rapids, Iowa 52401 Telephone (319) 786-4411	42-0331370
0-337	Wisconsin Power and Light Company (a Wisconsin corporation) 4902 N. Biltmore Lane Madison, Wisconsin 53718 Telephone (608) 458-3311	39-0714890

(Former name or former address, if changed since last report.)

This combined Form 8-K is separately filed by Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company.

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5 2.0302 Results ~~Amendments to Articles~~ of ~~Incorporation~~Operations orand ~~Bylaws;~~Financial ~~Change in Fiscal Year~~Condition.

On ~~May 9~~August 5, ~~2013~~2015, ~~the Board of Directors of~~ Alliant Energy Corporation (~~“AEC”)~~Alliant ~~approved the Restated Bylaws of AEC, effective May 10, 2013. The Restated Bylaws of AEC effected amendments to AEC’s existing Bylaws, including the following: (i~~Energy) ~~removal~~ ofissued ~~references~~a topress ~~specific~~release ~~committees~~announcing ofits ~~the~~earnings ~~Board~~for ~~of Directors of AEC and (ii) clarification of~~ the ~~powers~~ ~~and~~three ~~authority of the Board of Directors of AEC with respect to creating committees of the Board of Directors of AEC~~ and ~~designating~~six ~~members~~months ofended ~~such~~June 30, ~~committees~~2015. A copy of ~~the~~such ~~Restated~~press ~~Bylaws~~release ~~of AEC~~ is ~~included~~furnished as Exhibit 399.1 ~~to this Current Report on Form 8-K~~ and is ~~hereby~~ incorporated ~~herein~~ by reference. herein.

OnAlliant ~~May~~Energy included in the press release income from continuing operations and earnings per share from continuing operations for the three and six months ended June 930, ~~2013,~~2015 ~~the~~excluding ~~Board~~losses offrom ~~Directors~~the sales of Interstate Power and Light Company’s (“IPL”’s), Minnesota electric and ~~IPL’s~~natural ~~sole~~gas ~~common~~distribution ~~shareowner,~~assets. Alliant ~~AEC,~~Energy ~~approved~~believes ~~the~~these ~~Amended~~non-GAAP ~~and~~financial ~~Restated~~measures ~~Articles~~(financial ofmeasures ~~Incorporation~~not prepared in accordance with accounting principles generally accepted in the United States of ~~IPL,~~America) ~~effective~~are ~~May 10,~~useful ~~2013.~~to ~~The~~investors ~~Amended~~because they provide an alternate measure to better understand and ~~Restated~~compare ~~Articles~~across periods the operating performance of ~~Incorporation~~Alliant Energy without the distortion of ~~IPL incorporated~~items ~~all~~that ~~previously~~management ~~adopted~~believes ~~amendments~~are ~~concerning~~not ~~preferred~~normally ~~stock~~associated with ongoing operations, and ~~made~~also ~~certain~~provide ~~changes~~additional toinformation ~~reflect~~about ~~the~~Alliant ~~Iowa~~Energy’s ~~Business~~operations ~~Corporation~~on ~~Act.~~a Abasis ~~copy~~consistent ofwith the ~~Amended~~measures ~~and~~that ~~Restated~~management ~~Articles~~uses ofto ~~Incorporation~~manage ofits ~~IPL~~operations isand ~~included~~evaluate asits ~~Exhibit 3~~performance.2 Alliant toEnergy’s ~~this Current~~management ~~Report~~also onuses ~~Form~~income ~~8-K~~from ~~and~~continuing isoperations, ~~hereby~~as ~~incorporated~~adjusted, ~~herein~~to bydetermine ~~reference.~~performance-based compensation.

OnIn ~~May 9~~addition, ~~2013,~~Alliant ~~the~~Energy ~~Board~~included ofin ~~Directors~~the ofpress release IPL ~~approved~~; ~~the~~Wisconsin ~~Restated~~Power ~~Bylaws~~and ofLight ~~IPL,~~Company; ~~effective~~AE ~~May 10~~Transco Investments, ~~2013.~~LLC ~~The~~and ~~Restated~~Alliant ~~Bylaws~~Energy ofCorporate ~~IPL~~Services, ~~effected~~Inc.; ~~amendments~~utilities, toAmerican ~~IPL’s~~Transmission ~~existing~~Company ~~Bylaws,~~LLC ~~including~~and ~~the~~Alliant ~~following:~~Energy ~~(i) removal~~Corporate ofServices, ~~references~~Inc.; toand ~~specific~~non-regulated ~~committees~~and ofparent ~~the~~earnings ~~Board~~per ofshare ~~Directors of~~from ~~IPL~~continuing ~~and~~operations ~~(ii) clarification~~for of the ~~powers~~three and ~~authority~~six ofmonths ~~the~~ended ~~Board~~June 30, of2015 ~~Directors~~and of2014. Alliant ~~IPL~~Energy ~~with~~believes ~~respect~~these tonon-GAAP ~~creating~~financial ~~committees~~measures ofare ~~the~~useful ~~Board~~to ofinvestors ~~Directors~~because ofthey ~~IPL~~facilitate ~~and~~an ~~designating~~understanding ~~members~~ of ~~such~~segment ~~committees.~~performance Aand ~~copy~~trends ofand ~~the~~provide ~~Restated~~additional ~~Bylaws~~information ofabout ~~IPL~~Alliant ~~is included~~Energy’s asoperations ~~Exhibit~~on ~~3.3~~a tobasis ~~this~~consistent ~~Current~~with ~~Report~~the onmeasures ~~Form~~that ~~8-K~~management ~~and~~uses isto ~~hereby~~manage ~~incorporated~~its ~~herein~~operations byand ~~reference.~~evaluate its performance.

On ~~May 9, 2013,~~July ~~the Board of Directors of Wisconsin Power and Light Company (“WPL”)~~31, ~~and WPL’s sole common shareowner~~2015, ~~AEC,~~Alliant ~~approved~~Energy ~~the Amended~~ and ~~Restated~~IPL ~~Articles~~issued ofa ~~Incorporation~~press ofrelease ~~WPL,~~announcing ~~effective May 9, 2013. The Amended and Restated Articles of Incorporation of WPL removed all previously adopted amendments concerning preferred stock due to~~ the ~~full~~closing ~~redemption~~ of ~~all outstanding preferred stock at WPL, removed all rights associated with preferred stock, authorized~~ the ~~Board~~sale of ~~Directors~~ ofIPL’s ~~WPL~~Minnesota orelectric adistribution ~~committee~~assets. The ~~thereof~~sales ~~to establish the rights~~ of ~~holders~~IPL’s ofMinnesota ~~preferred~~electric ~~stock if issued in the future,~~ and ~~increased~~natural ~~the~~gas ~~number~~distribution ofassets ~~authorized~~resulted ~~shares~~in ofa ~~preferred stock~~($0.06) Inper ~~addition,~~share ~~the~~charge ~~amendments~~for ~~made~~the ~~certain~~three ~~changes~~months toended ~~reflect~~June ~~the Wisconsin~~30, ~~Business Corporation Law~~2015. A copy of the ~~Amended~~press ~~and~~release ~~Restated Articles of Incorporation of WPL~~ is ~~included~~furnished as Exhibit 399.42 ~~to this Current Report on Form 8-K~~ and is ~~hereby~~ incorporated ~~herein~~ by reference. herein.

2Item 9.01 Financial Statements and Exhibits.

On May 9, 2013, the Board of Directors of WPL approved the Restated Bylaws of WPL, effective May 10, 2013. The Restated Bylaws of WPL effected amendments to WPL’s existing Bylaws, including the following: (i) removal of references to specific committees of the Board of Directors of WPL and (ii) clarification of the powers and authority of the Board of Directors of WPL with respect to creating committees of the Board of Directors of WPL and designating members of such committees. A copy of the Restated Bylaws of WPL is included as Exhibit 3.5 to this Current Report on Form 8-K and is hereby incorporated herein by reference.

Item 5.07. Submission of Matters to a Vote of Security Holders.

The final results of voting on each of the matters submitted to a vote of shareowners during the annual meeting of shareowners of AEC on May 9, 2013 are as follows.

1. Election of directors for terms expiring in 2016. Each nominee for director was elected by the following vote:

	For	Withheld	BrokerNon-Votes
Michael L. Bennett	71,525,376	4,623,373	15,919,290
Darryl B. Hazel	71,635,710	4,513,038	15,919,290
David A. Perdue	71,475,734	4,673,015	15,919,290

2. Advisory vote on approval of the compensation of AEC’s named executive officers. This matter was approved by the following vote:

For		Against		Abstentions		BrokerNon-Votes
71,021,072		3,578,287		1,549,390		15,919,290

3. Ratification of the appointment of Deloitte & Touche LLP as AEC’s independent registered public accounting firm for 2013. This matter was approved by the following vote:

For		Against		Abstentions
90,658,756		862,758		546,524

The final results of voting on each of the matters submitted to a vote of shareowners of IPL for action by written consent on May 9, 2013 in lieu of an annual meeting of shareowners are as follows. AEC voted all of the 13,370,788 outstanding shares of common stock of IPL in favor of and approved (1) the election of Michael L.

Bennett, Darryl B. Hazel and David A. Perdue as directors of IPL for terms expiring in 2016, and (2) the ratification of the appointment of Deloitte & Touche LLP as IPL’s independent registered public accounting firm for 2013. There were no votes withheld, abstentions or broker non-votes with respect to these matters.

The final results of voting on each of the matters submitted to a vote of shareowners of WPL for action by written consent on May 9, 2013 in lieu of an annual meeting of shareowners are as follows. AEC voted all of the 13,236,601 outstanding shares of common stock of WPL in favor of and approved (1) the election of Michael L. Bennett, Darryl B. Hazel and David A. Perdue as directors of WPL for terms expiring in 2016, and (2) the ratification of the appointment of Deloitte & Touche LLP as WPL’s independent registered public accounting firm for 2013. There were no votes withheld, abstentions or broker non-votes with respect to these matters.

Item 9.01. Financial Statements and Exhibits.


(a)	Not applicable.

(b) Not applicable.

(~~3.1~~d) ~~Restated~~Exhibits. ~~Bylaws~~The offollowing ~~Alliant~~exhibits ~~Energy~~are ~~Corporation,~~being ~~effective~~furnished ~~May 10, 2013~~ herewith:

(399.21) Alliant ~~Amended~~Energy ~~and~~Corporation ~~Restated~~press ~~Articles~~release ofdated ~~Incorporation~~August ~~of Interstate Power and Light Company~~5, ~~effective May 10, 2013~~ 2015.

(399.32) Alliant ~~Restated~~Energy ~~Bylaws~~Corporation ofand Interstate Power and Light Company, ~~effective~~press ~~May 10,~~release ~~2013~~dated July 31, 2015.

(3.4) Amended and Restated Articles of Incorporation of Wisconsin Power and Light Company, effective May 9, 2013

(3.5) Restated Bylaws of Wisconsin Power and Light Company, effective May 10, 2013

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, ~~Alliant~~the ~~Energy~~registrants ~~Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company~~ have ~~each~~ duly caused this report to be signed on ~~its~~their behalf by the undersigned hereunto duly authorized.

	ALLIANT ENERGY CORPORATION
Date: May 10, 2013	By:	/s/ James H. Gallegos
		James H. Gallegos Vice President and General Counsel
	INTERSTATE POWER AND LIGHT COMPANY
Date: May 10, 2013	By:	/s/ James H. Gallegos
		James H. Gallegos Vice President and General Counsel
	WISCONSIN POWER AND LIGHT COMPANY
Date: May 10, 2013	By:	/s/ James H. Gallegos
		James H. Gallegos Vice President and General Counsel

ALLIANT ENERGY CORPORATION



Date: August 5, 2015	By:/s/ Robert J. Durian
	Robert J. Durian
	Vice President, Chief Accounting Officer and Controller

~~EXHIBIT~~INTERSTATE ~~INDEX~~POWER AND LIGHT COMPANY

Exhibit No.		Description
Date: August 5, 2015	By:/s/ Robert J. Durian
3.1		Restated Bylaws of Alliant Energy Corporation, effective May 10, 2013
	Robert J. Durian
3.2		Amended and Restated Articles of Incorporation of Interstate Power and Light Company, effective May 10, 2013
	Vice President, Chief Accounting Officer and Controller
3.3		Restated Bylaws of Interstate Power and Light Company, effective May 10, 2013
3.4		Amended and Restated Articles of Incorporation of Wisconsin Power and Light Company, effective May 9, 2013
3.5		Restated Bylaws of Wisconsin Power and Light Company, effective May 10, 2013

6WISCONSIN POWER AND LIGHT COMPANY



Date: August 5, 2015	By:/s/ Robert J. Durian
	Robert J. Durian
	Vice President, Chief Accounting Officer and Controller

ALLIANT ENERGY CORPORATION

INTERSTATE POWER AND LIGHT COMPANY

WISCONSIN POWER AND LIGHT COMPANY

Exhibit Index to Current Report on Form 8-K

Dated July 31, 2015

Exhibit Number


(99.1)	Alliant Energy Corporation press release dated August 5, 2015.


(99.2)	Alliant Energy Corporation and Interstate Power and Light Company press release dated July 31, 2015.

Filing Compare · INTERSTATE POWER & LIGHT CO