Schedule TO
UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549
 
Schedule TO
 
Tender Offer Statement under Section 14(d)(1)
of the Securities Exchange Act of 1934
 
ENDESA, S.A.
(Name of Subject Company (issuer))
 
E.ON Zwölfte Verwaltungs GmbH
E.ON AG 
(Names of Filing Persons (offerors))
 
Ordinary shares, nominal value €1.20 each
American Depositary Shares, each representing the right to receive one ordinary share 
(Titles of Classes of Securities)
 
Ordinary Shares, ISIN ES0130670112
American Depositary Shares, CUSIP 00029274F1, ISIN US29258N1072
(CUSIP and ISIN Numbers of Classes of Securities)
 
Mr. Karl-Heinz Feldmann
Senior Vice President and General Counsel
E.ON AG
E.ON - Platz
D-40479 Düsseldorf, Germany
011 49-211-45 79-0
(Name, address and telephone number of
person authorized to receive notices and communications on behalf of filing persons)
 
Copy to:
Richard Hall, Mark I. Greene
Cravath, Swaine & Moore LLP
Worldwide Plaza
825 Eighth Avenue
New York, NY 10019
(212) 474-1000
 


CALCULATION OF FILING FEE
 
Transaction Valuation
Amount of Filing Fee
Not Applicable*
Not Applicable*

* Pursuant to General Instruction D to Schedule TO, no filing fee is required because this filing contains only preliminary communications made before the commencement of a tender offer.
 
o
 
Check box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
 
Amount Previously Paid: N.A.
 
Form or Registration No.: N.A.
 
Filing Party: N.A.
 
Form: N.A.
 
Date Filed: N.A.
 

 
x
 
Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.
 

 
Check the appropriate boxes below to designate any transactions to which the statement relates:
 
x
 
third-party tender offer subject to Rule 14d-1
 
o
issuer tender offer subject to Rule 13e-4
 
o
 
going-private transaction subject to Rule 13e-3
 
o
 
amendment to Schedule 13D under Rule 13d-2
 
 

 
 
2
 
 
 
Item 12.  Exhibits.
Item 12 is hereby amended and supplemented by adding thereto:
  
Exhibit
  
Description
(a)(5)(BBB)    Transcript Conference Call, November 8, 2006
 
 
 
3

 

Exhibit Index.
 
The Exhibit Index is hereby amended and supplemented by adding thereto:
 
  
  
Exhibit
  
Description
(a)(5)(BBB)    Transcript Conference Call, November 8, 2006
 
 
4