Report of the Board of Directors of ENDESA, S.A. Regarding the Takeover Offer Made by E.ON Zwolfte Verwaltungs GmbH.

NEW YORK -- At its meeting on February 6, 2007, the Board of Directors of ENDESA, S.A. ("Endesa" or the "Company"), unanimously approved by the attending directors, for purposes of the provisions of article 36.8, in relation to article 20, of Royal Decree 1197/1991, of July 26, on the scheme of public tender offers, the following report on the Public Tender Offer (the "Offer") formulated by E.ON Zwolfte Verwaltungs GmbH ("E.ON" or the "Offeror") for a price of 38.75 euros per share, which includes the price enhancement filed by sealed envelope by the Offeror on February 2, 2007. This report, in addition to describing the principal features of the Offer, as amended, contains the Board's position on the Offer, as well as certain additional related information.

1. PRINCIPAL FEATURES OF THE OFFER

According to the explanatory Prospectus relating to the Offer authorized by the Spanish Securities Market Commission (Comision Nacional del Mercado de Valores; CNMV), the following are the principal features of the Offer:

1.1. Offeror

The Offeror is the German company E.ON Zwolfte Verwaltungs GmbH, a wholly-owned subsidiary of the German company E.ON AG.

1.2. Nature of the Offer

E.ON's Offer, which was authorized by the Spanish Securities Market Commission (Comision Nacional del Mercado de Valores; CNMV) on November 16, 2006, was filed as a competing Offer with respect to the public tender offer filed by Gas Natural SDG, S.A., which was authorized by the Spanish Securities Market Commission (Comision Nacional del Mercado de Valores; CNMV) on February 27, 2006. Notwithstanding the above, on February 1, 2007, Gas Natural SDG, S.A. communicated the decision to withdraw its offer, in accordance with the provisions of article 36.1 of Royal Decree 1197/1991, of July 26, as a consequence of which E.ON's Offer is the only one presently existing on the Company.

1.3. Securities Covered by the Offer

The Offer covers the 1,058,752,117 shares of Endesa each having a par value of 1.20 euros, thereby representing 100% of its capital stock.

1.4. Consideration

In accordance with the price enhancement presented by the Offeror by sealed envelope on February 2, 2007, E.ON is offering as consideration for each Endesa share an all-cash price of 38.75 euros.

The Spanish Securities Market Commission (Comision Nacional del Mercado de Valores; CNMV) has publicly confirmed that, following the withdrawal of its offer by Gas Natural SDG, S.A., the scheme for price enhancement of E.ON's Offer shall continue to be regulated by the provisions of Chapter V of Royal Decree 1197/1991, of July 26, as a consequence of which E.ON will not be able to make any subsequent modification to the price.

1.5. Period of Acceptance

The Spanish Securities Market Commission (Comision Nacional del Mercado de Valores; CNMV) has communicated that the end of the acceptance period for E.ON's Offer (which initially runs from January 26, 2007 through February 26, 2007) will be notified as soon as the extensions contemplated by articles 19 and 36 of Royal Decree 1197/1991, of July 26, on the scheme for public tender offers, can be specified. Therefore, the aforesaid period could be extended by the Spanish Securities Market Commission (Comision Nacional del Mercado de Valores) in order to allow Endesa's General Shareholders' Meeting to pronounce on the resolutions for bylaw amendments upon which the Offer is conditioned (see sections 1.6 and 2, infra).

1.6. Conditions of the Offer

The effectiveness of E.ON's Offer is conditioned upon the acquisition of a minimum of 529,481,934 shares of Endesa, representing 50.01% of its capital stock.

Furthermore, the Offer is conditioned both upon Endesa's General Shareholders' Meeting making certain amendments to the Bylaws and upon those amendments being enrolled on the Commercial Registry. Specifically, the Offer is conditioned upon the elimination of all limitations or restrictions on the number of votes that can be exercised by Endesa shareholders (Article 32 of the Bylaws), upon removal of requirements concerning the composition of Board of Directors and the type of Board members, with the corresponding removal of the restriction on the number of terms to which certain types of Board members may be elected (Articles 37 and 38 of the Bylaws), and upon the removal of all qualifications, except for those concerning the absence of legally prohibited conflicts of interest, on the appointment of a member of the Board of Directors or of a Managing Director/CEO (Article 42 of the Bylaws), all as more fully described in the Prospectus.

2. BOARD OF DIRECTORS' OPINION OF THE E.ON OFFER

The Board of Directors, by a unanimous vote of members present or represented at a meeting held on February 6, 2007, views the terms of the E.ON Offer favorably for the following reasons:

A. The consideration of [euro]38.75 per share, which values Endesa's total share capital at [euro]41,027 million, is fair, from a financial point of view, to the shareholders of Endesa. In reaching this conclusion, the Board of Directors considered the fairness opinions rendered by Endesa's financial advisors--BNP Paribas S.A. Spanish Branch, Citigroup Global Markets Limited, Deutsche Bank AG London Branch, J.P. Morgan Plc, Lehman Brothers (Europe) Limited and Merrill Lynch Capital Markets EspaSa, S.A--which state that, in the respective opinions of Endesa's financial advisors, the consideration is fair, from a financial point of view, to the shareholders of Endesa.

The offered consideration:

(i) is 109 percent higher than the closing price of [euro]18.56 per share on September 2, 2005, the last trading day prior to the announcement of the Gas Natural's offer, or 124 percent higher than such closing price if the dividends paid by Endesa since that date are taken into account.

(ii) is 65 percent higher than the implied value of the Gas Natural's offer of [euro]23.43 per share1 on February 1, 2007, the date on which the Gas Natural's offer was withdrawn, and 56 percent higher than the preceding offer by E.ON of [euro]24.905 per share.

(iii) is 30 percent higher than the average closing price per share of [euro]29.82 over the past 12 months, 16.3 percent higher than the average closing price per share of [euro]33.31 over the past six months, and 2.9 percent higher than the average closing price per share of [euro]37.65 over the past 30 days; the consideration is 0.7 percent lower than the closing price per share of [euro]39.04 on February 2, 2007, the highest closing price in Endesa's history, and 1.7 higher than the closing price per share of [euro]38.10 on February 5, 2007, the last trading day prior to the issuance of this report.

B. The consideration offered by E.ON consists entirely of cash, and the Offer is being made for 100 percent of the outstanding shares.

C. The Offeror has stated its intention to continue implementing Endesa's commercial strategy, including Endesa's investment plan, and to preserve Endesa's workforce, as well as its goal of promoting the development of the Spanish gas and electricity market, all as reflected in the Prospectus.

For the foregoing reasons, and with a view to allowing Endesa's shareholders to vote on the amendments to Endesa's by-laws required to be adopted as a condition to the E.ON Offer, the Board of Directors has unanimously resolved to convene an extraordinary general meeting of shareholders to be held at first call on March 20, 2007. In addition, and for the same purpose, the Board of Directors has determined to state its position in favor of these amendments and recommends that the shareholders of Endesa participate in the meeting and vote in favor of the amendments.

1 *Value calculated as per the trading price of the Gas Natural SDG, S.A. share at the close of February 1, 2007 (30.66 euros per share).

The members of the Board of Directors present or represented at the meeting of February 6, 2007, who are holders of Endesa shares, have unanimously expressed their intention to vote at the extraordinary general meeting of shareholders in favor of the amendments to Endesa's by-laws referred to above.

Shareholder Caja Madrid, through Mr. Miguel Blesa de la Parra, has likewise expressed its intention to vote in favor of such amendments.

3. EXISTENCE OF AGREEMENTS BETWEEN THE COMPANY AND THE OFFEROR

No agreement whatsoever exists between the Company and the Offeror in connection with the Offer, with the exception of the confidentiality agreement made on 16 January 2006 and described in Section 1.8.1 of the Prospectus.

4. AGREEMENTS BETWEEN THE OFFEROR AND MEMBERS OF ENDESA'S BOARD OF DIRECTORS

No agreement whatsoever exists in connection with the Offer between the Offeror and any of the members of Endesa's Board of Directors.

5. INDIVIDUAL OPINIONS OF THE MEMBERS OF THE ENDESA BOARD OF DIRECTORS

None of the members of Endesa's Board of Directors who attended or were represented at the Board meeting of February 6, 2007, has expressed an individual opinion of the Offer separate from the Board's collective opinion, which appears in Section 2 above.

Mr. Juan Ramon Quintas Seoane did not attend the above-mentioned Board meeting due to a potential conflict of interest related to his position as president of the Confederacion EspaSola de Cajas de Ahorro [Spanish Confederation of Savings Banks] and, therefore, has not stated his position on the Offer.

6. INTENTION OF BOARD MEMBERS WHO HOLD ENDESA SHARES TO ACCEPT THE OFFER

The members of the Board of Directors who attended, in person or by proxy, the Board meeting of February 6, 2007, and who are holders, directly or indirectly, of Endesa shares, have not yet adopted a decision on whether to accept the Offer with respect to the shares held by them, and believe they will be in a position to adopt it once the Extraordinary General Shareholders' Meeting which must pronounce on the bylaw amendments upon which the Offeror has conditioned the Offer has been held. They agree to make their decision public as soon as they adopt it and always within the acceptance period of the Offer.

Caja de Ahorros y Monte de Piedad de Madrid, through Mr. Miguel Blesa de la Parra, has stated that it has not yet adopted a resolution on whether to accept the Offer with respect to the Endesa shares held by this entity and that it believes it will be in a position to adopt the resolution once the aforesaid Extraordianry General Shareholders' Meeting has been held, agreeing to make its decision public as soon as it adopts it and always within the acceptance period of the Offer.

Mr. Juan Ramon Quintas Seoane, due to the cause mentioned in section 5, supra, did not attend the said Board meeting, notwithstanding which he has declared that he has not yet adopted a decision on whether to accept the Offer with respect to the 1,525 Endesa shares he owns, and that he will be in a position to adopt it once the aforesaid Extraordianry General Shareholders' Meeting has been held, agreeing to make his decision public as soon as he adopts it and always within the acceptance period of the Offer.

The following table indicates the number of Endesa shares that each member of the Board of Directors holds, directly or indirectly, as well as the percentage of the total share capital that each direct and indirect stake represents:

[TABLE OMITTED]

Madrid, February 6, 2007

Salvador Montejo Velilla

General Secretary and Secretary of the Board of Directors

BNP PARIBAS Sucursal en EspaSa

Ribera del Loira, 28

28042 MADRID

Madrid, February 5th, 2007

The Board of Directors

Endesa, S.A.

Ribera del Loira, 60

28042 Madrid

Spain

Members of the Board,

You have requested the expert opinion of BNP Paribas, acting as your financial adviser pursuant to the mandate agreement executed between our two companies (hereafter the "Mandate"), as to the adequacy, from a financial point of view (such financial opinion being hereafter referred to the adviser financial opinion), of the Offer Consideration (as defined below) proposed to be paid to the holders of the ordinary shares (the "Endesa Shares"), of Endesa, S.A. ("Endesa" or the "Company") and to the holders of the American Depositary Shares, evidenced by American Depositary Receipts, each of which represents one Endesa Share (the "Endesa ADSs" and collectively with the Endesa Shares, the "Endesa Securities") pursuant to the terms and subject to the conditions of the public takeover bid made by EON Zwolfte Verwaltungs GmbH, a wholly owned subsidiary of EON A.G. ("EON"), for all of the outstanding Endesa Securities as set forth in the Folleto filed by EON with the Spanish Comision Nacional del Mercado de Valores ("CNMV") on February 2, 2007 (the "Offer"). The consideration proposed to be paid to the holders of Endesa Securities pursuant to the Offer consists of [euro]38.75. per Endesa Security in cash (the "Offer Consideration").

1) Information and valuation methodology

In arriving at our opinion, BNP Paribas has

(i) reviewed certain publicly available business and financial information relating to the Company and certain publicly traded companies operating in similar businesses.

(ii) reviewed the audited financials statements of the Company for the fiscal years ended December 31, 2004, December 31, 2005 and unaudited accounts for the nine months ended September 30th, 2006.

(iii) reviewed certain information furnished by the Company, in the presentation disclosed by the Company on January 24, 2007.

(iv) held various meetings with the management to discuss the information received.

(v) reviewed and compared the historical and current stock prices and valuation multiples for the Company and publicly traded companies operating in similar businesses.

(vi) performed such other analyses, made use of such other valuation methods and considered such other financial, market and economic factors as BNP Paribas deemed appropriate.

(vii) noticed the announcement made by E.On on February 2nd, 2007 and reviewed the Offer.

BNP Paribas has based its own valuation work, carried out in order to draw up its adviser financial opinion, only on the documents, data and information referred to in the previous paragraph as well as on publicly available information. In the framework of its valuation work, BNP Paribas has not checked the authenticity, thoroughness, exhaustivity and/or accuracy of all the information to which BNP Paribas has had access, as it did not enter into its assignment pursuant to the Mandate, and has assumed and relied, without assuming any responsibility for independent verification, upon the accuracy and completeness of all financial and other information and data publicly available or provided to or discussed with us by Endesa and that no relevant information in relation to the Company has been omitted or remains undisclosed to BNP Paribas. BNP Paribas' assignment did not include assessing the Information, nor assessing the assets and liabilities of Endesa and the companies it owns and/or controls (together with Endesa: "the Endesa Group"), nor submitting these above mentioned documents, data and information, assets and liabilities to an independent appraisal (and this, in any of the following areas: legal, environmental, fiscal, social, etc.). Neither has BNP Paribas checked the tax position of the several entities composing the Endesa Group. BNP Paribas has considered that the financial projections and all the forecast data and assumptions that were provided to it (i) reflected the best estimations and judgements of those who drafted these financial projections, forecast data and assumptions, including their managements, (ii) were faithfully established on the basis of realistic assumptions, founded on information that had the aforementioned characteristics. We have not made or been provided with an independent evaluation or appraisal of the assets or liabilities (contingent or otherwise) of Endesa nor have we made any physical inspection of the properties or assets of Endesa. Our adviser financial opinion does not address the relative merits of the Offer as compared to any alternative business strategies that might exist for Endesa or the effect of any other transaction in which Endesa might engage. Our adviser financial opinion is necessarily based upon information available to us, and financial, stock market and other conditions and circumstances existing as of the date hereof.

2) Disclosures

BNP Paribas has provided in the past, currently provides and intends to provide commercial services to Endesa in the fields of investment and financing banking, for which BNP Paribas has received, is about to receive and expects to receive financial revenues, habitual fees and commissions. Additionally, as a financial services provider, BNP Paribas is currently acting as financial advisor to Endesa in connection with its consideration of the Offer. Pursuant to its Mandate, BNP Paribas expect to receive fees, a portion of which is dependent on the outcome of the Offer and certain other contingencies, and Endesa has agreed to reimburse BNP Paribas's expenses and indemnify BNP Paribas against certain liabilities arising out of its Mandate.

BNP Paribas and/or any of its subsidiaries/affiliates have provided in the past, currently provide and may be required in the future, for their own account or on behalf of their clients, to provide services to Endesa and EON and/or to any of their affiliates, unrelated to the Offer, for which services BNP Paribas and/or any of its subsidiaries and/or affiliates have received and expect to receive compensation. In the ordinary course of their business, services BNP Paribas and/or any of its subsidiaries and/or affiliates may actively trade or hold the securities of Endesa and/or EON for their own account or for the account of their customers and, accordingly, may at any time hold a long or short position in such securities. In addition, BNP Paribas and/or any of its subsidiaries and/or affiliates (including BNP Paribas and its affiliates) may maintain relationship with Endesa, EON and their respective affiliates. In addition, BNP Paribas has provided and may continue to provide financing and financial structuring services to EON in connection with the Offer for which it has received and will receive compensation. Also, subject to appropriate procedures, BNP Paribas and/or any of its subsidiaries and/or affiliates may provide similar services to one or more third parties regarding possible alternative transactions with Endesa and may receive additional compensation from such third parties.

3) Adviser financial opinion

Our advisory services and the adviser financial opinion expressed herein are provided for the information of the Board of Directors of Endesa in its evaluation of the Offer, and our adviser financial opinion is not intended to be and does not constitute a recommendation to any stockholder as to whether such stockholder should accept or reject the Offer or as to how such stockholder should vote or act on any matters relating to the Offer. This adviser financial opinion is only intended to assist the Board of Directors of Endesa in its own assessment of the Offer.

This adviser financial opinion reflect the judgement of BNP Paribas as of the date of this document and is based exclusively on the information mentioned in the paragraph Information and valuation methodology here above, the features/characteristics of the Offer, the economic and market conditions as of the issue date of this adviser financial opinion. Any significant change, either in the operational information or in the Offer features as described or referred to in the paragraph Information and valuation methodology, as well as any event which could lead to a revision of our working assumptions, methods, etc., set out above, would invalidate this adviser financial opinion. Should BNP Paribas be required to revise its adviser financial opinion, it would have to issue a new and distinct adviser financial opinion.

Our adviser financial opinion may not be published or otherwise used or referred to, nor should any public reference to BNP Paribas be made, without our prior written consent; provided, however, that a full, complete and exact duplication of this letter may be included in any Solicitation/Recommendation Statement on Schedule 14D-9 required to be filed by Endesa with the U.S. Securities and Exchange Commission and in any Article 20 Recommendation Statement required to be filed with the CNMV; and, provided further, that references to this adviser financial opinion may also be included in any document sent to Endesa's shareholders in connection with the Offer, provided that, if any such reference is not a full, complete and exact duplication of this opinion, then our prior approval of any such reference shall be required, such approval not to be unreasonably denied or withheld.

4.) Conclusion

Based upon and subject to the foregoing, our experience as investment bankers, our work as described above (including the valuation methodology used as described in our valuation report and other factors we deemed relevant), and the valuation results we reached, as such results were indicated to the board of directors of Endesa we are of the opinion that, as of the date hereof, the Offer Consideration is fair (Adecuado), from a financial point of view, to the holders of Endesa Securities.

Very truly yours,

BNP PARIBAS Sucursal en EspaSa

/s/ Ramiro Mato Garcia-Ansorena  >
/s/ Eduardo Aguilar Fernandez-Hontoria
Ramiro Mato Garcia-Ansorena      >
Eduardo Aguilar Fernandez-Hontoria
General Manager                  >
Senior Banker

ANNEX B

5 February 2007

The Board of Directors

Endesa, S.A.

C/ Ribera del Loira, 60

28042 Madrid

Spain

Members of the Board:

You have requested our opinion as to the fairness, from a financial point of view, of the Offer Consideration (as defined below) proposed to be paid to the holders of the ordinary shares, nominal value [euro]1.20 each (the "Endesa Ordinary Shares"), of Endesa, S.A. ("Endesa" or the "Company") and to the holders of the American Depositary Shares, evidenced by American Depositary Receipts, each of which represents one Endesa Ordinary Share (the "Endesa ADSs" and collectively with the Endesa Ordinary Shares, the "Endesa Securities") pursuant to the terms and subject to the conditions of the public takeover bid made by E.ON Zwolfte Verwaltungs GmbH, a wholly owned subsidiary of E.ON A.G. ("EON"), for all of the outstanding Endesa Securities as set forth in the amended Folleto filed by EON with the Spanish Comision Nacional del Mercado de Valores ("CNMV") on November 16, 2006 (the "Offer"). The consideration proposed to be paid to the holders of Endesa Securities pursuant to the Offer consists of [euro]38.75 per Endesa Security in cash (the "Offer Consideration").

In arriving at our opinion, we reviewed the terms and conditions of the Offer and held discussions with certain senior officers, directors and other representatives and advisors of Endesa concerning the business, operations and prospects of Endesa. We examined certain publicly available business and financial information relating to Endesa as well as certain financial forecasts and other information and data relating to Endesa that were provided to or discussed with us by the management of Endesa. We reviewed the financial terms of the Offer in relation to, among other things: current and historical market prices and trading volumes of Endesa Securities; the historical and projected earnings and other operating data of Endesa; and the capitalization and financial condition of Endesa. We considered, to the extent publicly available, the financial terms of certain other transactions that we considered relevant in evaluating the Offer and analyzed certain financial, stock market and other publicly available information relating to the businesses of other companies whose operations we considered relevant in evaluating those of Endesa. In addition to the foregoing, we conducted such other analyses and examinations and considered such other information and financial, economic and market criteria as we deemed appropriate in arriving at our opinion.

In rendering our opinion, we have assumed and relied, without assuming any responsibility for independent verification, upon the accuracy and completeness of all financial and other information and data publicly available or provided to or discussed with us by Endesa and that no relevant information in relation to the Company has been omitted or remains undisclosed to us. With respect to financial forecasts and other information and data relating to Endesa provided to or otherwise reviewed by or discussed with us, we have been advised by the management of Endesa that such forecasts and other information and data were reasonably prepared on bases reflecting the best currently available estimates and judgments of the management of Endesa as to the future financial performance of Endesa. We have not made or been provided with an independent evaluation or appraisal of the assets or liabilities (contingent or otherwise) of Endesa nor have we made any physical inspection of the properties or assets of Endesa. Our opinion does not address the relative merits of the Offer as compared to any alternative business strategies that might exist for Endesa or the effect of any other transaction in which Endesa might engage. Our opinion is necessarily based upon information available to us, and financial, stock market and other conditions and circumstances existing as of the date hereof.

Citigroup Global Markets Limited has acted as financial advisor to Endesa in connection with its consideration of the Offer pursuant to our engagement by the Company. We expect to receive fees for our services in connection with our engagement, a portion of which is dependent on the outcome of the Offer and certain other contingencies, and Endesa has agreed to reimburse our expenses and indemnify us against certain liabilities arising out of our engagement.

We and our affiliates in the past have provided, and currently provide, services to Endesa and EON unrelated to the Offer, for which services we and such affiliates have received and expect to receive compensation. In the ordinary course of our business, we and our affiliates may actively trade or hold the securities of Endesa and EON for our own account or for the account of our customers and, accordingly, may at any time hold a long or short position in such securities. In addition, we and our affiliates (including Citigroup Inc. and its affiliates) may maintain relationships with Endesa, EON and their respective affiliates. Subject to appropriate procedures, we have provided and may continue to provide financing and financial structuring services to EON in connection with the Offer for which we have received and will receive compensation.

Our advisory services and the opinion expressed herein are provided for the information of the Board of Directors of Endesa in its evaluation of the Offer, and our opinion is not intended to be and does not constitute a recommendation to any stockholder as to whether such stockholder should accept or reject the Offer or as to how such stockholder should vote or act on any matters relating to the Offer.

Our opinion may not be published or otherwise used or referred to, nor should any public reference to Citigroup Global Markets Limited be made, without our prior written consent; provided, however, that a full, complete and exact duplication of this letter may be included in any Solicitation/ Recommendation Statement on Schedule 14D-9 required to be filed by Endesa with the U.S. Securities and Exchange Commission and in any Article 20 Recommendation Statement required to be filed with the CNMV; and, provided further, that references to this opinion may also be included in any document sent to Endesa's shareholders in connection with the Offer, provided that, if any such reference is not a full, complete and exact duplication of this opinion, then our prior approval of any such reference shall be required, such approval not to be unreasonably denied or withheld.

Based upon and subject to the foregoing, our experience as investment bankers, our work as described above and other factors we deemed relevant, we are of the opinion that, as of the date hereof, the Offer Consideration is fair, from a financial point of view, to the holders of Endesa Securities.

Very truly yours,

CITIGROUP GLOBAL MARKETS LIMITED

Signed by: Manuel Falco

ANNEX C

5 February 2007

The Board of Directors

Endesa, S.A.

C/ Ribera del Loira, 60

28042 Madrid

Spain

Dear Sirs:

Opinion of Deutsche Bank AG London as Financial Advisor to Endesa, S.A.

You have requested our opinion with respect to whether the Consideration (as defined below) proposed to be paid to the holders of the ordinary shares, nominal value of [euro]1.20 each (the "Endesa Ordinary Shares"), of Endesa S.A. ("Endesa" or the "Company"), including holders of American Depositary Shares, each representing one Endesa Ordinary Share (the "Endesa ADSs" and together with the Endesa Ordinary Shares, the "Endesa Shares"), pursuant to the offer made by E.ON Zwolfte Verwaltungs GmbH, a wholly owned subsidiary of E.ON A.G. ("E.ON"), to purchase all of the outstanding Endesa Shares as described in the Folleto (the "Folleto") filed by E.ON with the Spanish Comision Nacional del Mercado de Valores (the "CNMV") on November 16, 2006 as amended (the "Offer"), is fair, from a financial point of view, to such holders. The consideration proposed to be paid pursuant to the Offer consists of [euro]38.75 in cash for each outstanding Endesa Share (the "Consideration").

In connection with Deutsche Bank's role as financial advisor to Endesa, and in arriving at its opinion, Deutsche Bank has, among other things, reviewed certain publicly available financial and other information concerning Endesa, certain internal analyses and other information relating to Endesa furnished to it by Endesa and the financial aspects of certain selected merger and acquisition transactions that Deutsche Bank has considered comparable to the Offer. Deutsche Bank has also held discussions with members of the senior management of Endesa regarding the business and prospects of Endesa. In addition, Deutsche Bank has (i) reviewed the reported prices and trading activity for the Endesa Shares, (ii) compared certain financial and stock market information for Endesa with similar information for selected companies in similar sectors whose securities are publicly traded, (iii) reviewed the financial terms of the Offer, and (iv) performed such other studies and analyses and considered such other factors as it deemed appropriate.

[TABLE OMITTED]

Deutsche Bank has not assumed responsibility for independent verification of, and has not independently verified, any information, whether publicly available or furnished to it, concerning Endesa, including, without limitation, any financial information, forecasts or projections considered in connection with the rendering of its opinion. Accordingly, for purposes of its opinion, Deutsche Bank has assumed and relied upon the accuracy and completeness of all such information and Deutsche Bank has not conducted a physical inspection of any of the properties or assets, and has not prepared or obtained any independent valuation or appraisal of any of the assets or liabilities of Endesa. With respect to the financial forecasts and projections made available to Deutsche Bank by Endesa and used in its analyses, Deutsche Bank has assumed that such financial forecasts and projections have been reasonably prepared on bases reflecting the best currently available estimates and judgments of the management of Endesa as to the future financial performance of Endesa. In rendering its opinion, Deutsche Bank expresses no view as to the reasonableness of such forecasts and projections or the assumptions on which they are based. Deutsche Bank's opinion is necessarily based upon economic, market and other conditions as in effect on, and the information made available to it as of the date of the opinion. Our opinion does not address the effect of any other transaction in which Endesa might engage.

This opinion is addressed to, and for the use and benefit of, the Board of Directors of Endesa and is not a recommendation to any shareholder of Endesa to accept or reject the Offer. This opinion is limited to the fairness, from a financial point of view, to the holders of the Endesa shares of the Consideration.

We have acted as financial advisor to Endesa in connection with its consideration of the Offer. We expect to receive fees for our services in connection with our engagement, a portion of which is dependent on the outcome of the Offer and certain other contingencies, and Endesa has agreed to indemnify us against certain liabilities arising out of our engagement. We are an affiliate of Deutsche Bank AG (together with its affiliates, the "DB Group"). One or more members of the DB Group has provided or may continue to provide, from time to time, investment banking, commercial banking (including extension of credit) and other financial services to Endesa and E.ON or their respective affiliates for which it has received or may receive compensation. Subject to appropriate procedures, Deutsche Bank is acting as financier and lender to E.ON in relation to the Offer for which Deutsche Bank expects to receive material financing fees and we may provide financing and lending services to an additional one or more third parties in the event of an alternative transaction to the Offer, for which we may also receive fees and other compensation from such third parties.

In the ordinary course of business, members of the DB Group may actively trade in the securities and other instruments and obligations of Endesa or E.ON for their own accounts and for the accounts of their customers. Accordingly, members of the DB Group may at any time hold a long or short position in such securities, instruments and obligations. For the purpose of its opinion, Deutsche Bank has considered only information that has been provided to it in its capacity of financial advisor to Endesa.

In conducting its analyses and arriving at its opinion, Deutsche Bank utilized a variety of generally accepted valuation methods, commonly used for these types of analyses. The analyses were prepared solely for the purpose of enabling Deutsche Bank to provide its opinion to the Endesa Board of Directors as to the fairness, from a financial point of view, to Endesa's shareholders of the Consideration and do not purport to be appraisals or necessarily reflect the prices at which businesses or securities may actually be sold, which are inherently subject to uncertainty.

Based upon and subject to the foregoing, it is our opinion that, as of the date hereof, the Consideration is fair from a financial point of view to the holders of the Endesa Shares.

This letter may not be reproduced, summarised or referred to in any public document or given to any person without the prior written consent of Deutsche Bank, except that references to, and a complete copy of this letter may be included in any communication to shareholders of the Company, including any Solicitation/Recommendation Statement on Schedule 14D-9 required to be filed by Endesa with the U.S. Securities and Exchange Commission and on the Article 20 Recommendation Statement required to be filed with the CNMV, in each case with respect to the Offer. If this opinion is to be referred to in any document provided to shareholders of the Company and such document does not also include a complete copy of this opinion, any and all such references shall be subject to our prior review and written consent.

Very truly yours,

DEUTSCHE BANK AG LONDON

ANNEX D

Enrique Casaneuva

Managing Director

PRIVATE AND CONFIDENTIAL

February 6, 2007

The Board of Directors

Endesa, S.A.

Rivera del Loira, 60

28042 Madrid

Ladies and Gentlemen:

You have requested that J.P. Morgan plc ("JPMorgan") provide an opinion with respect to the adequacy, from a financial point of view, of the Consideration (as defined below) proposed to be paid to the holders of the ordinary shares of Endesa S.A. ("Endesa" or the "Company"), nominal value [euro]1.2 each (the "Endesa Ordinary Shares"), including holders of American Depositary Shares representing Endesa Ordinary Shares (the "Endesa ADSs" and together with the Endesa Ordinary Shares, the "Endesa Shares") (collectively, the "Endesa Shareholders"), pursuant to the offer made by EON ZWOLFTE VERWALTUNGS GMBH ("E.On") to purchase all of the outstanding Endesa Shares, upon the terms and subject to the conditions set forth in the offer prospectus (the "Offer Prospectus") filed by E.On and authorised by the SpanishComision Nacional de Mercado de Valores on November 16, 2006, and improved by E.On on February 2, 2007 (the "Improved Offer"). The nominal value of the Improved Offer is [euro]38.75 for each Endesa Share. The consideration proposed to be paid pursuant to the Offer will only be in the form of cash (the "Consideration").

Please be advised that while certain provisions of the Improved Offer are summarized above, the terms of the Improved Offer are more fully described in the Offer Prospectus. As a result, the description of the Improved Offer is qualified in its entirety by reference to the more detailed information appearing or incorporated by reference in the Offer Prospectus.

In arriving at our opinion, we have reviewed (i) the Improved Offer and the Offer Prospectus; (ii) the conditions to the Offer imposed by the Spanish Ministry of Industry in its resolution dated 4 of November 2006; (iii) certain publicly available information concerning the business of the Company and of certain other companies engaged in businesses comparable to the Company, and the reported market prices for certain other companies' securities deemed comparable; (iv) publicly available terms of certain offers involving companies comparable to the businesses of the Company and the consideration received for such companies; (v) current and historical market prices of the common stock of the Company; (vi) the audited financial statements of the Company for the fiscal years ended December 31, 2004 and December 31, 2005; (vii) the document on Preliminary 2006 Results and 2009 Targets released by the Company on January 24, 2007; and (viii) certain financial projections as well as other financial analyses and forecasts prepared by the Company and its management.

In addition, we have held discussions with certain members of the management of the Company with respect to certain aspects of the Improved Offer, the past and current business operations of the Company, and certain other matters we believed necessary or appropriate to our inquiry. We have reviewed such other financial studies and analyses and considered such other information as we deemed appropriate for the purposes of this opinion.

In performing such analysis, we have used such valuation methodologies as we have deemed necessary or appropriate for the purposes of this opinion. Our view is based on (i) our consideration of the information the Company has supplied to us to date, and (ii) our understanding of the terms of the Improved Offer presented by E.On as well as of related governmental/regulatory approvals.

In giving our opinion, we have relied upon and assumed, without independent verification, the accuracy and completeness of all information that was publicly available or was furnished to us by the Company or otherwise reviewed by us, including the information in the Improved Offer, and we have relied on it being complete and accurate in all material respects. We have not verified the accuracy or completeness of any such information and we have not conducted any evaluation or appraisal of any assets or liabilities, nor have any such evaluations or appraisals been provided to us. In relying on financial analyses and forecasts provided to us, we have assumed that they have been reasonably prepared based on assumptions reflecting the best currently available estimates and judgments by management as to the expected future results of operations and financial condition of the Company to which such analyses or forecasts relate. We have also assumed that the Improved Offer will have the consequences described in discussions with, and materials furnished to us by, representatives and advisers of the Company. We have also assumed that the Improved Offer will be accounted for under current accounting principles in Spain.

Our opinion is necessarily based on economic, market and other conditions as in effect on, and the information made available to us as of, the date hereof. It should be understood that subsequent developments may affect this opinion and that we do not have any obligation to update, revise, or reaffirm this opinion. In the ordinary course of their businesses, affiliates of JPMorgan may actively trade the debt and equity securities of the Company or E.On, for their own accounts, or for the accounts of customers, and accordingly, may at any time hold a long or short position in such securities.

We are expressing no opinion herein as to the price at which any Endesa Shares will trade at any time. Other factors after the date hereof may affect the value of the businesses of the Company, including but not limited to (i) the total or partial disposition of the share capital of the Company by their shareholders within a short period of time, (ii) changes in prevailing interest rates and other factors which generally influence the price of securities, (iii) adverse changes in the current capital markets, (iv) the occurrence of adverse changes in the financial condition, business, assets, results of operations or prospects of the Company, and (v) any necessary actions by or restrictions of any governmental agencies or regulatory authorities. No opinion is expressed whether any alternative transaction might be more beneficial to the Company. Our opinion is necessarily based upon information available to us, and financial, stock market and other conditions and circumstances existing as of the date hereof.

We have acted as financial advisor to Endesa in connection with the Improved Offer pursuant to our engagement by the Company. We expect to receive fees for our services in connection with our engagement, a portion of which is dependent on the outcome of the Improved Offer and certain other contingencies, and Endesa has agreed to reimburse our expenses and indemnify us against certain liabilities arising out of our engagement.

Please be advised that we have had and continue to have significant and on-going financial advisory and other relationships with the Company and, subject to appropriate procedures and consents, we are providing and in the future may provide financing services to one or more third parties regarding competing transactions, for which we may also receive fees and other compensation from such third parties. Please be also advised that we have an investment banking and commercial banking relationship with E.On, and in particular have been appointed to provide financing to E.On in relation to the Improved Offer.

Based upon and subject to the foregoing, it is our opinion that, as of the date hereof, the Consideration is fair from a financial point of view to the Endesa Shareholders.

This letter is provided solely for the benefit of the Board of Directors of the Company in connection with and for the purposes of, their consideration of the Improved Offer, does not constitute a recommendation to any stockholder of the Company as to whether or not such stockholder should tender Endesa Shares pursuant to the Improved Offer or any other matter, and is not on behalf of, and shall not confer rights or remedies upon, any shareholder of the Company or E.On, or any other person other than the Board of Directors of the Company or be used for any other purpose. This opinion may not be disclosed, referred to or communicated by you (in whole or in part) to any third party for any purpose whatsoever except with our prior written consent in each instance, except that a copy of this letter may be reproduced in full and included in any communication to the shareholders of the Company, including any Solicitation/Recommendation Statement on Schedule 14D-9 required to be filed by Endesa with the U.S. Securities and Exchange Commission and any Article 20 Recommendation Statement required to be filed with the Spanish Comision Nacional de Mercado de Valores, in each case with respect to the Improved Offer.

This opinion has been provided in English and in Spanish. In the event of a discrepancy between the two versions, the English version shall prevail.

Very truly yours,

J.P. MORGAN PLC

By: /s/ Enrique Casanueva

Name: Enrique Casanueva

Title: Managing Director

Annex E

To the Attention of:

Board of Directors

Endesa, S.A.

Ribera del Loira, 60

28042 Madrid

6 February 2007

Members of the Board,

You have requested our opinion with respect to whether the Consideration (as defined below) proposed to be paid to the holders of the ordinary shares, nominal value [euro]1.20 each (the "Endesa Ordinary Shares"), of Endesa S.A. ("Endesa" or the "Company"), and the holders of American Depositary Shares representing Endesa Ordinary Shares (the "Endesa ADSs" and together with Endesa Ordinary Shares, the "Endesa Shares"), pursuant to the revised terms and conditions of the offer (the "Offer") made by E.ON Zwolfte Verwaltungs GmbH ("E.ON") to purchase all of the outstanding Endesa Shares, as described in the Folleto filed by E.ON and approved by the Comision Nacional de Mercado de Valores ("CNMV") on 26 January 2007 (the "Offer Document") and as disclosed by the CNMV in the "Hecho Relevante" published on 2 February 2007, is fair, from a financial point of view, to such holders. The consideration proposed to be paid pursuant to the Offer consists of [euro]38.75 in cash for each outstanding Endesa Share (the "Consideration"), although Endesa ADS holders will receive an equivalent US Dollar amount, based on the spot market exchange rate prevailing upon closing of the Offer.

In arriving at our opinion, we have reviewed and analysed: (1) the Offer Document, (2) certain publicly available information concerning the businesses of the Company which we believe to be relevant, (3) financial and operating information with respect to the business, operations and prospects of the Company furnished to us by the Company, including certain internal financial analyses and forecasts prepared by the Company and its management, (4) a trading history of the Company's share capital from 1 January 2005 to the present day and a comparison of that trading history with those of other companies which we deemed relevant, (5) a comparison of the historical financial results and present financial condition of the Company with those of other companies which we deemed relevant, (6) the audited financial statements of the Company for the financial year ended 31 December 2005 and earnings estimates for the year ended 31 December 2006 disclosed by the Company on 24 January 2007, (7) a comparison of the financial terms of the Offer with the terms of certain other recent transactions or business combinations which we deemed relevant, and (8) the projected earnings and other operating data of the Company provided to us by its management. In addition, we have had discussions with the management of the Company concerning its business, operations, assets, financial condition and prospects and undertook such other studies, analyses and investigations as we deemed necessary or appropriate for the purposes of this opinion.

We have assumed and relied upon the accuracy and completeness of all financial and other information used by us in arriving at our opinion without independent verification and we have also relied on it not being misleading in any material respect. With respect to the financial forecasts and/or projections of the Company, upon the Company's advice we have assumed that such forecasts and/or projections have been reasonably prepared on a basis reflecting the best currently available estimates and judgments of the management of the Company as to the future financial performance of the Company. In arriving at our opinion, we have not conducted a physical inspection of the properties and facilities of the Company and have not made nor obtained any evaluations or appraisals of the assets or liabilities of the Company. Our opinion is necessarily based upon market, economic and other information available to us and conditions as they exist on, and can be evaluated as of, the date of this letter.

We have acted as financial advisor to Endesa in connection with its consideration of the Offer pursuant to our engagement by the Company. Without prejudice to the terms of the engagement letter which we entered into with the Company on 27 October 2005, we do not have any obligation to update, amend, revise or reaffirm this opinion. We expect to receive fees for our services in connection with our engagement, a portion of which is dependent on the outcome of the Offer and certain other contingencies, and Endesa has agreed to reimburse our expenses and indemnify us against certain liabilities arising out of our engagement.

In the ordinary course of our business, affiliates of Lehman Brothers may actively trade in the debt and equity securities of the Company and/or E.ON, for their own accounts, or for the accounts of customers and, accordingly, may at any time hold a long or short position in such securities. Also, with the consent of the Company and in accordance with our internal policy regarding conflicts of interest, we have participated as a junior lender in the debt facilities made available to E.ON in relation to the Offer, for which we will receive fees.

Based upon and subject to the foregoing, it is our opinion that, as of the date hereof, the Consideration is fair from a financial point of view to the holders of the Endesa Shares.

This opinion is solely for the use and benefit of the Board of Directors of the Company in connection with and for the purposes of, their consideration of the Offer and shall not be disclosed publicly or made available to any third party, or referred to (whether in whole or in part) without our prior written approval in each instance, except that a complete copy of this opinion may be included in any communication to the shareholders of the Company, including any Solicitation/Recommendation Statement on Schedule 14D-9 required to be filed by Endesa with the U.S. Securities and Exchange Commission and any Article 20 Recommendation Statement required to be filed with the CNMV, in each case with respect to the Offer. If this opinion is to be referred to in any document provided to shareholders of the Company, any and all such references must be approved by Lehman Brothers in advance, such approval not to be unreasonably withheld. This opinion is not intended to be and does not constitute a recommendation to any shareholder as to whether to accept or reject the consideration to be paid to such shareholder in connection with the Offer.

Yours faithfully,

LEHMAN BROTHERS EUROPE LIMITED

/s/ Juan Gich

Juan Gich

Managing Director

ANNEX F

Board of Directors

Endesa, S.A.

Ribera del Loira 60

Madrid 28042

6 February 2007

Members of the Board of Directors:

You have requested our opinion as to the adequacy, from a financial point of view, of the Consideration (as defined below) proposed to be paid to the holders of the ordinary shares, nominal value [euro]1.20 each (the "Endesa Ordinary Shares"), of Endesa S.A. (the "Endesa" or the "Company"), including holders of American Depositary Shares representing Endesa Ordinary Shares (the "Endesa ADSs" and together with the Endesa Ordinary Shares, the "Endesa Securities"), pursuant to the terms and conditions of the offer made by E.ON Zwolfte Verwaltungs GmbH, a wholly owned subsidiary of E.ON A.G. ("E.ON"), to purchase all of the outstanding Endesa Securities, as set forth in the Folleto filed by E.ON with the Spanish Comision Nacional del Mercado de Valores (the "CNMV") on October 3, 2006 and as amended on February 2, 2007 (the "Offer"). The consideration proposed to be paid pursuant to the Offer consists of [euro]38.75 in cash for each outstanding Endesa Security (the "Consideration").

In arriving at the opinion set out below, we have, among other things:

1. Reviewed certain publicly available business and financial information relating to the Company that we deemed to be relevant;

2. Reviewed certain information furnished to us by the Company, including financial forecasts, relating to the business, earnings, cash flow, assets, liabilities and prospects of the Company;

3. Conducted discussions with members of management of the Company concerning the matters described in clauses 1 and 2 above;

4. Reviewed the market prices and valuation multiples for the Endesa Securities and compared them with those of certain publicly traded companies that we deemed to be relevant;

5. Compared the proposed financial terms of the Offer with the financial terms of certain other transactions that we deemed to be relevant; and

6. Reviewed such other financial studies and analyses and taken into account such other matters as we deemed necessary, including our assessment of general economic, market and monetary conditions.

In preparing our opinion, we have assumed and relied on the accuracy and completeness of all information supplied or otherwise made available to us, discussed with or reviewed by or for us, or publicly available, and we have not assumed any responsibility for independently verifying such information or undertaken an independent evaluation or appraisal of any of the assets or liabilities of the Company nor have we evaluated the solvency or fair value of the Company under any laws relating to bankruptcy, insolvency or similar matters. In addition, we have not assumed any obligation to conduct any physical inspection of the properties or facilities of the Company. With respect to the financial forecast information furnished to or discussed with us by the Company, we have assumed that it has been reasonably prepared and reflects the best currently available estimates and judgment of the Company's management as to the expected future financial performance of the Company.

Our opinion is necessarily based upon market, economic and other conditions as they exist and can be evaluated on, and on the information made available to us as of, the date of this letter. We are not expressing any opinion as to the prices at which the Endesa Securities will trade following the delivery of the opinion or consummation of the Offer.

We have acted as financial advisor to Endesa in connection with its consideration of the Offer pursuant to our engagement by the Company. We expect to receive fees for our services in connection with our engagement, a portion of which is dependent on the outcome of the Offer and certain other contingencies, and Endesa has agreed to reimburse our expenses and indemnify us against certain liabilities arising out of our engagement.

We have, in the past, provided financial advisory and financing services to the Company and E.ON and/or their respective affiliates and may continue to do so in services unrelated to the Offer and have received, and may receive, fees for the rendering of such services. In addition, in the ordinary course of our business, we may actively trade the Endesa Securities and other securities of the Company, as well as the securities of E.ON, for our own account and for the accounts of customers and, accordingly, may at any time hold a long or short position in such securities.

This opinion is for the use and benefit of the Board of Directors of the Company in its evaluation of the Offer and shall not be used for any other purpose. This opinion shall not, in whole or in part, be disclosed, reproduced, disseminated, quoted, summarised or referred to at any time, in any manner or for any purpose, nor shall any public references to Merrill Lynch Capital Markets EspaSa, S.A., S.V. or any of its affiliates be made by the Company or any of its affiliates, without the prior consent of Merrill Lynch Capital Markets EspaSa, S.A., S.V., except that (i) a complete copy of this letter may be included in any communication to the shareholders of the Company, including any Solicitation/Recommendation Statement on Schedule 14D-9 required to be filed by Endesa with the U.S. Securities and Exchange Commission and any Article 20 Recommendation Statement required to be filed with the CNMV in Spain, in each case with respect to the Offer, and (ii) references to our opinion, which are not a complete copy of this letter, may also be included in any communication sent to shareholders of the Company in connection with the Offer, subject to our prior approval, which shall not be unreasonably denied or withheld.

Based upon and subject to the foregoing, it is our opinion that, as of the date hereof, the Consideration is fair, from a financial point of view, to the holders of the Endesa Securities.

Yours faithfully,

MERRILL LYNCH CAPITAL MARKETS ESPANA, S.A., S.V.