UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

 

FORM 10-Q

 

| x      | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE |
|--------|------------------------------------------------------------------------------|
|   | ACT OF 1934                                                                  |  
 

For the quarterly period ended **September 30, 2006**

 
or

o

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE

 

ACT OF 1934

 
 

For the transition period from _______ to _______

 
 

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

 

 

 

 

0-4117-1

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

 

 

This combined Form 10-Q is separately filed by Alliant Energy Corporation, Interstate Power and Light Company and Wisconsin Power and Light Company.  Information contained in the Form 10-Q relating to Interstate Power and Light Company and Wisconsin Power and Light Company is filed by such registrant on its own behalf.  Each of Interstate Power and Light Company and Wisconsin Power and Light Company makes no representation as to information relating to registrants other than itself.

 

Indicate by check mark whether the registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days.  Yes xNo o

 

Indicate by check mark whether the registrants are large accelerated filers, accelerated filers, or non-accelerated filers.  See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act.

Alliant Energy Corporation

Large accelerated filer x

Accelerated filer o

Non-accelerated filer o

Interstate Power and Light Company

Large accelerated filer o

Accelerated filer o

Non-accelerated filer x

 
Wisconsin Power and Light Company

Large accelerated filer o

Accelerated filer o

Non-accelerated filer x

 
 

Indicate by check mark whether the registrants are shell companies (as defined in Rule 12b-2 of the Exchange Act).

Yes o

No x

 

Number of shares outstanding of each class of common stock as of October 31, 2006:

Alliant Energy Corporation

Common stock, $0.01 par value, 116,091,255 shares outstanding

Interstate Power and Light Company

Common stock, $2.50 par value, 13,370,788 shares outstanding (all of which

 

are owned beneficially and of record by Alliant Energy Corporation)

Wisconsin Power and Light Company

Common stock, $5 par value, 13,236,601 shares outstanding (all of which are

 

owned beneficially and of record by Alliant Energy Corporation)

 

 

 

**TABLE OF CONTENTS**

 

Page

Part I.**

Financial Information**

2

Item 1.

Condensed Consolidated Financial Statements (Unaudited)

2

 

Alliant Energy Corporation:

 

 

Condensed Consolidated Statements of Income for the Three and Nine Months Ended Sep. 30, 2006 and 2005

2

 

Condensed Consolidated Balance Sheets as of Sep. 30, 2006 and Dec. 31, 2005

3

 

Condensed Consolidated Statements of Cash Flows for the Nine Months Ended Sep. 30, 2006 and 2005

5

 

Notes to Condensed Consolidated Financial Statements

6

 

Interstate Power and Light Company:

 

 

Condensed Consolidated Statements of Income for the Three and Nine Months Ended Sep. 30, 2006 and 2005

27

 

Condensed Consolidated Balance Sheets as of Sep. 30, 2006 and Dec. 31, 2005

28

 

Condensed Consolidated Statements of Cash Flows for the Nine Months Ended Sep. 30, 2006 and 2005

30

 

Notes to Condensed Consolidated Financial Statements

31

 

Wisconsin Power and Light Company:

 

 

Condensed Consolidated Statements of Income for the Three and Nine Months Ended Sep. 30, 2006 and 2005

34

 

Condensed Consolidated Balance Sheets as of Sep. 30, 2006 and Dec. 31, 2005

35

 

Condensed Consolidated Statements of Cash Flows for the Nine Months Ended Sep. 30, 2006 and 2005

37

 

Notes to Condensed Consolidated Financial Statements

38

Item 2.

Management’s Discussion and Analysis of Financial Condition and Results of Operations

41

Item 3.

Quantitative and Qualitative Disclosures About Market Risk

59

Item 4.

Controls and Procedures

59

Part II.

Other Information

59

Item 1A.

Risk Factors

59

Item 2.

Unregistered Sales of Equity Securities and Use of Proceeds

60

Item 6.

Exhibits

60

 

Signatures

61

1

 

**PART I. FINANCIALINFORMATION
**ITEM 1.  CONDENSED CONSOLIDATEDFINANCIAL STATEMENTS (UNAUDITED)**

**ALLIANT ENERGYCORPORATION**** |