QuickLinks -- Click here to rapidly navigate through this document

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM U-9C-3

QUARTERLY REPORT PURSUANT TO RULE 58 OF
THE PUBLIC UTILITY HOLDING COMPANY ACT OF 1935
For the Quarterly Period Ended March 31, 2005

E.ON AG
E.ON US Holding GmbH
E.ON US Investments Corp.
LG&E Energy LLC
(Name of Registered Holding Company)

E.ON AG
E.ON-Platz 1
40479 Dusseldorf
Germany
(Address of Principal Executive Offices)

Inquiries concerning this Form U-9C-3 may be directed to:

Dr. Rainer Liesen
General Legal Affairs
E.ON AG
E.ON-Platz 1
40479 Dusseldorf
Germany
49 (211) 4579 603

E.ON AG

FORM U-9C-3
For the Quarter Ended March 31, 2005

Table of Contents

Item 1. —   ORGANIZATION CHART   1

Item 2. —
 
ISSUANCES AND RENEWALS OF SECURITIES AND CAPITAL CONTRIBUTIONS
 
4

Item 3. —
 
ASSOCIATED TRANSACTIONS
 
5

Item 4. —
 
SUMMARY OF AGGREGATE INVESTMENT
 
8

Item 5. —
 
OTHER INVESTMENTS
 
10

Item 6. —
 
FINANCIAL STATEMENTS AND EXHIBITS
 
11

i

This report covers the quarter ended March 31, 2005.


Item 1.—ORGANIZATION CHART

Name of Reporting Company
   Energy or
Gas-related
Company
   Date of
Organization
   State/Country
of Organization
   Percentage of
Voting
Securities Held
   Nature of Business
    E.ON AG   (a)   6/16/00   Germany   n/a   Holding Company
    E.ON US Holding GmbH   (a)   —   Germany   100%   Intermediate Holding Company; subsidiary of E.ON AG
    E.ON US Investments Corp.   (a)   12/2/00   Delaware   100%   Intermediate Holding Company; subsidiary of E.ON US Holding GmbH
1.   LG&E Energy LLC+   (a)   12/    /03   Kentucky   100%   Intermediate Holding Company; subsidiary of E.ON US Investments Corp.
1.1   LG&E Energy Marketing Inc.   Energy   4/18/84   Oklahoma   100%   Power Marketing
1.1.1   Woodlands Technology, LLC   Energy   —   Texas   15%   Development of software for energy-marketing activities
1.2   LG&E Capital Corp.   (a)   4/26/91   Kentucky   100%   Non-Utility Holding Company
1.2.1   LG&E Credit Corp.   Energy   7/11/97   Kentucky   100%   Consumer Lending Services
1.2.2   LG&E Home Services Inc.   Energy   1/22/96   Kentucky   100%   Appliance Repair and Warranty
1.2.3   Airborne Pollution Control Inc.   Energy   12/10/98   Alberta, Canada   4.9%   Pollution and Waste Control Technology
1.2.4   FSF Minerals Inc.   Energy   12/28/98   Kentucky   100%   Owner of Coal Reserves
1.2.5   LG&E International Inc.   Energy   11/8/93   Delaware   100%   Management and Holding Company
1.2.5.1   LG&E Power Services LLC   Energy   6/29/01   Delaware   100%   Power facilities management and operations
1.2.6   WKE Corp.   (a)   5/1/98   Kentucky   100%   Investment Holding Company
1.2.6.1   LCC LLC   Energy   3/2/99   Kentucky   100%   Owns Options on Mineral Rights
1.2.6.2   FCD LLC   Energy   2/17/00   Kentucky   100%   Owns Options and Actual Riparian Rights
1.2.7   LG&E Power Inc.   (a)   5/7/80   Delaware   100%   Holding Company for Non-Utility Investments
1.2.7.1   LG&E Power Operations Inc.   Energy   6/8/82   California   100%   Power Project Ownership, Management & Development
1.2.7.1.1   LG&E Power 5 Incorporated   *   3/31/83   California   100%   Inactive
1.2.7.1.2   LG&E Power 16 Incorporated   (a)   8/3/99   California   100%   Indirect Owner of Generation Facilities
1.2.7.1.3   LG&E Power Roanoke Incorporated   (a)   8/3/89   California   100%   Indirect Owner of Generation Facilities
1.2.7.1.3.1   LG&E Roanoke Valley LP   (a)   3/14/90   California   1%gp1
99%lp2		   Indirect Owner of Generation Facilities
1.2.7.1.4   LG&E Power 31 Incorporated   *   2/7/95   California   100%   Inactive
                         

1

1.2.7.1.5   LG&E Power 31 Wind Incorporated   *   12/19/94   California   100%   Inactive
1.2.7.1.5.1   LG&E Power 31 L.P.   *   2/95   California   1%gp3
99%lp4		   Inactive
1.2.7.1.6   Westmoreland-LG&E Partners   Energy   —   Virginia   —   Owner of interest in QF
1.2.7.1.7   LG&E/Kelso Partners, L.P.   *   —   California   —   Inactive
1.2.7.2   American Power Incorporated   *   4/9/87   California   100%   Former Investor in EWG
1.2.7.3   LG&E Power Development Inc.   Energy   12/12/84   California   100%   Development of QFs and EWGs
1.2.7.4   LG&E Crown Inc.   *   4/14/2000   Delaware   100%   Prior Owner of Investment in Gas Gathering, Processing and Storage Facilities; Inactive
1.2.7.5   LG&E Minor Facilities Inc.   *   4/14/2000   Delaware   100%   Prior Owner of Investment in Gas Gathering, Processing and Storage Facilities; Inactive
1.2.7.6   Power Tex Parent Inc.   *   4/14/2000   Delaware   100%   Prior Owner of Investment in Gas Gathering, Processing and Storage Facilities; Inactive
1.2.7.7   Llano Gathering Inc.   *   4/20/2000   New Mexico   100%   Prior Owner of Investment in Gas Gathering, Processing and Storage Facilities; Inactive
1.2.7.8   Llano Storage Inc.   *   4/20/2000   New Mexico   100%   Prior Owner of Investment in Gas Gathering, Processing and Storage Facilities; Inactive
1.2.7.9   LG&E Power Gregory I Inc.   *   3/30/78   New Mexico   100%   Inactive
1.2.7.10   LG&E Power Gregory II Inc.   *   5/18/98   Delaware   100%   Inactive
1.2.8   KUCC Grimes Corporation   Energy   7/6/98   Delaware   100%   Former investor in QF development
1.2.9   KU Solutions Corporation   Energy   11/21/95   Kentucky   100%   Energy Marketing and Services
+
LG&E Energy Corp. was merged into LG&E Energy LLC on December 30, 2003. Numerical designations show degree of remoteness from LG&E Energy LLC.

(a)
Directly or indirectly holds securities in energy-related companies

*
Inactive

gp
general partnership interest

lp
limited partnership interest

1
directly held by LG&E Power 16 Incorporated

2
directly held by LG&E Power Roanoke Incorporated

3
directly held by LG&E Power 31 Incorporated

4
directly held by LG&E Power 31 Wind Incorporated

2

Narrative Description of Activities of Each
Reporting Company during the Reporting Period

        LG&E Energy Marketing Inc. conducts asset-based energy marketing and trading activities, including brokering and marketing of electric power and natural gas.

        LG&E Capital Corp., directly and through it subsidiaries and affiliates, including WKE Corp., LG&E Power Inc., LG&E Power Operations Inc. and other subsidiaries, is a holding company for non-utility domestic energy and energy related operations, investments, activities and services.

        LG&E Credit Corp. and LG&E Home Services Inc. formerly provided energy-related financing, appliance repair, consumer lighting and other services to customers.

        WKE Corp. and its subsidiaries lease and operate power generation facilities in western Kentucky and associated facilities, including coal or fuel related assets.

        LG&E Power Inc. conducts non-utility domestic energy operations and activities through its subsidiaries and affiliates. These interests or operations relate to domestic power generation facilities in North Carolina (the Power Roanoke entities), all of which are EWG's, QF's or both.

        LG&E International Inc. owns interests in FUCOs in Argentina. A subsidiary, LG&E Power Services LLC, provides operation and maintenance services pursuant to contracts with affiliated and unaffiliated domestic power generation facilities in North Carolina, Texas and Virginia.

3


Item 2.—ISSUANCES AND RENEWALS OF SECURITIES AND CAPITAL CONTRIBUTIONS

Company Issuing
Security
   Type of Security
Issued
   Principal
Amount of Security*
   Issue or Renewal
   Cost of
Capital
   Person to
Whom Security
was Issued
   Collateral
Given with
Security
   Consideration
Received for
Each Security
LG&E Capital Corp.   Money pool loan   $ (7,286,791 ) —   —   Money pool   N/A   —
LG&E Energy
Marketing Inc.		   Money pool loan   $ (15,280,481 ) —   —   Money pool   N/A   —
*
Reflects net change in intercompany loans during the reporting period. (Parenthesis denote reduction.)

With respect to transactions with an associate company:

Company
Contributing Capital
   Company
Receiving Capital
   Amount of
Capital Contribution
LG&E Energy LLC   LG&E Energy Marketing Inc.   $45 million
LG&E Energy LLC   LG&E Capital Corp.   $35 million

4


Item 3.—ASSOCIATE TRANSACTIONS

NOTE: Chart reflects the net intercompany balance sheet flows between the entities with respect to the period. In some cases, this includes amounts not related to applicable services provided or received by the entities involved. Among other items, "miscellaneous services" also includes quarterly intercompany clearance of tax settlements made among the entities.

Part I.—Transactions Performed by Reporting Companies on behalf of Associate Companies.

Reporting Company
Rendering Services
   Associate Company
Receiving Services
   Types of Services
Rendered
   Direct Costs
Charged
   Indirect Costs
Charged
   Cost of
Capital
   Total
Amount
Billed
Home Services   LG&E Capital Corp.   Miscellaneous Services   $ 1,791           $ 1,791
Home Services   LG&E Utility   Miscellaneous Services   $ 4,800           $ 4,800
Home Services   Services Company   Miscellaneous Services   $ 102           $ 102
FSF Minerals Inc.   LG&E Capital Corp.   Miscellaneous Services   $ 10,102           $ 10,102
KU Solutions   LG&E Capital Corp.   Miscellaneous Services   $ 2,916           $ 2,916
LCC LLC   WKEC   Miscellaneous Services   $ 6,078           $ 6,078
LCC LLC   LEL   Miscellaneous Services   $ 86           $ 86
FCD LLC   LG&E Capital Corp.   Miscellaneous Services   $ 76,711           $ 76,711
FCD LLC   WKEC   Miscellaneous Services   $ 3,217           $ 3,217
FCD LLC   LEL   Miscellaneous Services   $ 6,165           $ 6,165
LG&E Energy Marketing Inc.   LG&E Capital Corp.   Miscellaneous Services   $ 213,714           $ 213,714
LG&E Power Inc.   LG&E Power Development Inc.   Convenience Payments   $ 600           $ 600
LG&E Power Inc.   LG&E Power Operations Inc.   Miscellaneous Services   $ 988,438           $ 988,438
LG&E Power Inc.   LG&E Power Operations Inc.   Labor Related   $ 31,206           $ 31,206
LG&E Power Inc.   LG&E Power Operations Inc.   Convenience Payments   $ 39,891           $ 39,891
LG&E Power Inc.   LG&E Power Gregory I Inc.   Miscellaneous Services   $ 3,898,830           $ 3,898,830
LG&E Power Services LLC   LG&E Power Inc.   Miscellaneous Services   $ 151,780           $ 151,780
LG&E Power Services LLC   LG&E Power Inc.   Labor Related   $ 31,437           $ 31,437
LG&E Power Services LLC   LG&E Power Inc.   Convenience Payments   $ 2,408           $ 2,408
LG&E Power Services LLC   LG&E Power Operations Inc.   Convenience Payments   $ 488           $ 488
LG&E Power Services LLC   LG&E Power Operations Inc.   Miscellaneous Services   $ 163           $ 163
LG&E Power Services LLC   LG&E Power Operations Inc.   Labor Related   $ 3,585           $ 3,585
LG&E Power Services LLC   LG&E Power Operations Inc.   Other Payments   $ 9,396           $ 9,396
LG&E Power Services LLC   LG&E International Inc.   Convenience Payments   $ 50           $ 50
LG&E Power Operations Inc.   Llano Gathering Inc.   Convenience Payments   $ 3,269           $ 3,269
LG&E Power Gregory II   LG&E Power Inc.   Miscellaneous Services   $ 2,515,874           $ 2,515,874

5

Part II—Transactions Performed by Associate Companies on behalf of Reporting Companies.

NOTE: Chart reflects the net intercompany balance sheet flows between the entities with respect to the period. In some cases, this includes amounts not related to applicable services provided or received by the entities involved. Among other items, "miscellaneous services" also includes quarterly intercompany clearance of tax settlements made among the entities.

Associate Company Rendering Services
   Reporting Company Receiving Services
   Types of Services
Rendered
   Direct Costs
Charged
   Indirect Costs
Charged
   Cost of
Capital
   Total Amount Billed
LG&E Capital Corp.   Home Services   Miscellaneous Services   $ 4,063             $ 4,063
LG&E Capital Corp.   FSF Minerals Inc.   Miscellaneous Services   $ 37,945             $ 37,945
LG&E Capital Corp.   KU Solutions   Miscellaneous Services   $ 11,645             $ 11,645
LG&E Capital Corp.   LCC LLC   Miscellaneous Services   $ 19,581             $ 19,581
LG&E Capital Corp.   FCD LLC   Miscellaneous Services   $ 65,530             $ 65,530
Kentucky Utilities   KU Solutions   Labor Related   $ 55,208             $ 55,208
Kentucky Utilities   KU Solutions   Miscellaneous Services   $ 10,573             $ 10,573
Kentucky Utilities   KU Solutions   Convenience Payments   $ 131,313             $ 131,313
Services Company   Home Services   Miscellaneous Services   $ 1,697             $ 1,697
Services Company   FSF Minerals Inc.   Miscellaneous Services   $ 2,271             $ 2,271
Services Company   FCD LLC   Miscellaneous Services   $ 1,081             $ 1,081
Services Company   LG&E Power Inc.   Miscellaneous Services   $ 432,928   $ 34,724       $ 467,652
Services Company   LEM   Miscellaneous Services   $ 1,189,516   $ 542,178       $ 1,731,694
LG&E Power Inc.   LG&E Power Operations Inc.   Miscellaneous Services   $ 988,438             $ 988,438
LG&E Power Inc.   LG&E Power Operations Inc.   Labor Related   $ 31,206             $ 31,206
LG&E Power Inc.   LG&E Power Operations Inc.   Convenience Payments   $ 39,891             $ 39,891
LG&E Power Inc.   LG&E Power Gregory I Inc.   Miscellaneous Services   $ 3,898,830             $ 3,898,830
LG&E Power Services LLC   LG&E Power Inc.   Miscellaneous Services   $ 151,780             $ 151,780
LG&E Power Services LLC   LG&E Power Inc.   Labor Related   $ 31,437             $ 31,437
LG&E Power Services LLC   LG&E Power Inc.   Convenience Payments   $ 2,408             $ 2,408
LG&E Power Services LLC   LG&E Power Operations Inc.   Convenience Payments   $ 488             $ 488
LG&E Power Services LLC   LG&E Power Operations Inc.   Other Payments   $ 9,396             $ 9,396
LG&E Power Gregory II Inc.   LG&E Power Inc.   Miscellaneous Services   $ 2,515,874             $ 2,515,874
LG&E Power Argentina I Inc.   LG&E Power Inc.   Miscellaneous Services   $ 2             $ 2
                               

6

LG&E Power Development Inc.   LG&E Power Operations Inc.   Other Payments   $ 3,191             $ 3,191
LG&E Power 16 Inc.   LG&E Power Operations Inc.   Miscellaneous Services   $ 4,492,334             $ 4,492,334
LG&E Power Roanoke Inc.   LG&E Power Operations Inc.   Miscellaneous Services   $ 100,372             $ 100,372
Llano Gathering Inc.   LG&E Power Operations Inc.   Miscellaneous Services   $ 1,452             $ 1,452

Company Names:
 
 
 
 

LEL
 
LG&E Energy LLC
 
 
LG&E Utility   Louisville Gas and Electric Company    
Kentucky Utilities   Kentucky Utilities Company    
WKEC   Western Kentucky Energy Corp.    
Home Services   LG&E Home Services Inc.    
KU Solutions   KU Solutions Corporation    
LEM   LG&E Energy Marketing Inc.    
Services Company   LG&E Energy Services Inc.    

7


Item 4.—SUMMARY OF AGGREGATE INVESTMENT

Investments in energy-related companies:

Total consolidated capitalization as of March 31, 2005   $ 79,237,146,000   Line 1

Total capitalization multiplied by 15% (Line 1 multiplied by 0.15)
 
$
11,885,571,900
 
Line 2

Greater of $50 million or Line 2
 
$
11,885,571,900
 
Line 3
   
   
Total current aggregate investment*:
(categorized by major line of energy-related business)		          

Energy-related business Category—Rule 58(b)(1)(i) (1)
 
$
0
 
 

Energy-related business Category—Rule 58(b)(1)(ii) (2)
 
$
0
 
 

Energy-related business Category—Rule 58(b)(1)(iv) (3)
 
$
4,200,441
 
 

Energy-related business Category—Rule 58(b)(1)(v) (4)
 
$
874,259,687
 
 

Energy-related business Category—Rule 58(b)(1)(vii) (5)
 
$
19,976,692
 
 

Energy-related business Category—Rule 58(b)(1)(viii) (6)
 
$
32,876,459
 
 

Energy-related business Category—Rule 58(b)(1)(ix) (7)
 
$
6,571,923
 
 
   
   
Total current aggregate investment   $ 937,885,202   Line 4
   
   
Difference between the greater of $50 million or 15% of capitalization and the total aggregate investment of the registered holding company system (line 3 less line 4)   $ 10,947,686,698   Line 5
   
   
*
Includes aggregate investment in energy-related companies made prior to March 24, 1997.

(1)
Rule 58(b)(1)(i)—the rendering of energy management services and demand-side management services.

(2)
Rule 58(b)(1)(ii)—the development and commercialization of electrotechnologies related to energy conservation, storage and conversion, energy efficiency, waste treatment, greenhouse gas reduction, and similar innovations.

(3)
Rule 58(b)(1)(iv)—the sale of electric and gas appliances; equipment to promote new technologies, or new applications for existing technologies, that use gas or electricity; and equipment that enables the use of gas or electricity as an alternate fuel; and the installation and servicing thereof.

(4)
Rule 58(b)(1)(v)—the brokering and marketing of energy commodities, including but not limited to electricity, natural or manufactured gas and other combustible fuels.

(5)
Rule 58(b)(1)(vii)—the sale of technical, operational, management, and other similar kinds of services and expertise, developed in the course of utility operations in such areas as power plant and transmission system engineering, development, design and rehabilitation; construction; maintenance and operation; fuel procurement, delivery and management; and environmental licensing, testing and remediation.

(6)
Rule 58(b)(1)(viii)—the development, ownership or operation of "qualifying facilities," as defined under the Public Utility Regulatory Policies Act of 1978, as amended ("PURPA"), and any integrated thermal, steam host, or other necessary facility constructed, developed or acquired primarily to enable the qualifying facility to satisfy the useful thermal output requirements under PURPA.

8

(7)
Rule 58(b)(1)(ix)—the ownership, operation and servicing of fuel procurement, transportation, handling and storage facilities, scrubbers, and resource recovery and waste water treatment facilities.

Investments in gas-related companies:

Total current aggregate investment:      
(categorized by major line of gas-related business)      

Gas-related business Category—Rule 58(b)(2)(i) (1)
 
$
0

Gas-related business Category—Rule 58(b)(2)(ii) (2)
 
$
0
   

Total current aggregate investment
 
$
0
   
(1)
Rule 58(b)(2)(i)—activities permitted under Section 2(a) of the Gas-Related Activities Act of 1990, 104 Stat. 2810.

(2)
Rule 58(b)(2)(ii)—activities specified in Section 2(b) of the Gas-Related Activities Act of 1990, 104 Stat. 2810.

9


Item 5.—OTHER INVESTMENTS

Major Line of Energy-Related Business
   Other Investment
in Last
U-9C-3 Report
   Other Investment
in this U-9C-3
   Reason for Difference
in Other Investment
Gas related businesses   $ 22,322,388   $ 22,324,182   Changes in intercompany advances from 12/31/04 amounts
International investments (Argentine gas distribution and Spanish generation)   $ 42,554,404   $ 43,167,069   Changes in intercompany advances from 12/31/04 amounts
Consumer credit investments (LG&E Credit Corp.)   $ 297,351   $ 297,111   Changes in intercompany advances from 12/31/04 amounts
Unregulated generation investments   $ 101,760,887   $ 101,522,755   Changes in intercompany advances from 12/31/04 amounts.

10


Item 6.—FINANCIAL STATEMENTS AND EXHIBITS

A. Financial Statements:

Exhibit A   Financial Statements for Reporting Companies.
(Filed confidentially; Confidential treatment requested pursuant to Rule 104(b), 17 CFR 250-104(b))

 
 
FS-1
 
LG&E Home Services
    FS-2   LG&E Power Inc. Consolidated
    FS-3   LG&E Energy Marketing Inc.
    FS-4   KU Solutions
    FS-5   LG&E Power Services, Inc.
    FS-6   LG&E Power Operations
    FS-7   LG&E Power Gregory I, Inc.
    FS-8   LG&E Power Gregory II, Inc.
    FS-9   LG&E Power Gregory III, Inc.*
    FS-10   LG&E Power Gregory IV, Inc.*
    FS-11   FSF Minerals Inc.
    FS-12   LCC LLC
    FS-13   FCD LLC
    FS-14   Westmoreland-LG&E Partners—Rova II
*
Sold January 6, 2005

B. Exhibits:

Exhibit B-1   Copies of contracts required to be provided by Item 3

 
 
    None

Exhibit B-2
 
Officer's Certification

11


SIGNATURE

        The undersigned registered holding companies have duly caused this quarterly report to be signed on their behalf by the undersigned officers thereunto duly authorized pursuant to the requirements of the Public Utility Holding Company Act of 1935, as amended.

    E.ON AG
E.ON US Holding GmbH
E.ON US Investments Corp.
LG&E Energy LLC

Date: May 26, 2005
 
E.ON AG

 
 
By:
/s/  MICHAEL C. WILHELM      
    Name: Michael C. Wilhelm
    Title: Senior Vice President Accounting

 
 
By:
/s/  KARL-HEINZ FELDMANN      
    Name: Karl-Heinz Feldmann
    Title: Senior Vice President Legal Affairs, General Counsel

Exhibit B-2


CERTIFICATE

        I hereby certify that the Form U-9C-3 for E.ON AG for the previous quarter has been provided to the state commissions listed below:

Kentucky Public Service Commission
P.O. Box 615
211 Sower Boulevard
Frankfort, KY 40602

Virginia State Corporation Commission
1300 E. Main Street
Richmond, VA 23219

Date: May 26, 2005   E.ON AG

 
 
By:
/s/  MICHAEL C. WILHELM      
    Name: Michael C. Wilhelm
    Title: Senior Vice President Accounting

 
 
By:
/s/  KARL-HEINZ FELDMANN      
    Name: Karl-Heinz Feldmann
    Title: Senior Vice President Legal Affairs,
General Counsel



QuickLinks

SIGNATURE
CERTIFICATE