UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_______________________

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

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Date of Report

(Date of earliest

event reported):    September 21, 2015

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

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

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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 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

(b)    On September 21, 2015, Ann K. Newhall informed the Chairman of the Boards of Directors (the “Boards”) of Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company that she will resign from the Boards of each of the companies effective September 24, 2015.

SIGNATURES

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

	ALLIANT ENERGY CORPORATION
Date: September 24, 2015	By:/s/ James H. Gallegos
	James H. Gallegos
	Senior Vice President, General Counsel & Corporate Secretary

	INTERSTATE POWER AND LIGHT COMPANY
Date: September 24, 2015	By:/s/ James H. Gallegos
	James H. Gallegos
	Senior Vice President, General Counsel & Corporate Secretary

	WISCONSIN POWER AND LIGHT COMPANY
Date: September 24, 2015	By:/s/ James H. Gallegos
	James H. Gallegos
	Senior Vice President, General Counsel & Corporate Secretary