=============================================================================== FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of April, 2005 Commission File Number: 333-07654 ENDESA, S.A. (Translation of Registrant's Name into English) Ribera del Loira, 60 28042 Madrid, Spain (Address of principal executive office) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F: Form 20-F ___X___ Form 40-F_______ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): Yes_______ No ___X___ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): Yes_______ No ___X___ Indicate by check mark whether by furnishing the information contained in this Form, the Registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934: Yes_______ No ___X___ If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): N/A --- ================================================================================ Endesa, Grupo Santander and Union Fenosa Begin Sale of Their Auna Stakes NEW YORK--(BUSINESS WIRE)--April 26, 2005--ENDESA (NYSE:ELE), Grupo SANTANDER and UNION FENOSA have jointly decided to begin the orderly and competitive sale of their shareholdings in AUNA or, as relevant, its assets, proposing the latter for approval by the governing bodies of the telecommunications group. Merrill Lynch has been assigned the mandate for this process. The three companies, the core shareholders of the AUNA group with a combined 83.5% of the shares, will ask the remaining shareholders to participate in the sale. AUNA is present in fixed and mobile telephony through its Auna Telecomunicaciones and Amena subsidiaries, respectively. The group ended 2004 with more than 11 million customers, posting sales of Euro 4,239 million. CONTACT: Endesa North America Investor Relations Office David Raya, 212-750-7200 http://www.endesa.es SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. ENDESA, S.A. Dated: April 26th, 2005 By: /s/ David Raya -------------------------------------- Name: David Raya Title: Manager of North America Investor Relations