Offering Circular dated 29 May 2013 ENEL – Società per Azioni (incorporated with limited liability in Italy) as an Issuer and Guarantor and ENEL FINANCE INTERNATIONAL N.V. (a limited liability company incorporated in The Netherlands, having its registered office at Herengracht 471,1017 BS Amsterdam, The Netherlands) as an Issuer €35,000,000,000 Global Medium Term Note Programme On 7 December 2000 ENEL — Società per Azioni (“ENEL” or the “Company”) entered into a Global Medium Term Note Programme (the “Programme”) and issued an offering circular on that date describing the Programme. The Programme was subsequently updated, most recently on 30 May 2012. This Offering Circular supersedes all previous Offering Circulars. Any Notes (as defined below) issued under the Programme on or after the date of this Offering Circular are issued subject to the provisions herein. This does not affect any Notes already issued. Under the Programme, each of ENEL and ENEL Finance International N.V. (“ENEL N.V.”) may from time to time issue notes (the “Notes”) denominated in any currency agreed between the relevant Issuer and the relevant Dealer (as defined below). References in this Offering Circular to the “relevant Issuer” shall, in relation to any Tranche of Notes, be construed as references to the Issuer which is, or is intended to be, the Issuer of such Notes as indicated in the applicable Final Terms. The payment of all amounts owing in respect of Notes issued by ENEL N.V. will be unconditionally and irrevocably guaranteed by ENEL in its capacity as guarantor (the “Guarantor”). ENEL N.V. has a right of substitution as set out in Condition 16(a) and Condition 16(c). ENEL N.V. may at any time, without the consent of the Noteholders or the Couponholders, substitute for itself as principal debtor under the Notes and the Coupons either ENEL as Issuer or any of ENEL’s Subsidiaries (as defined below). ENEL or the relevant Subsidiary (failing which, ENEL) shall indemnify each Noteholder and Couponholder against any adverse tax consequences of such a substitution, except that neither ENEL nor the relevant Subsidiary shall be liable under such indemnity to pay any additional amounts either on account of “imposta sostitutiva” or on account of any other withholding or deduction in the event of payment of interest or other amounts paid to a non-Italian resident legal entity or a non-Italian resident individual which is resident in a country which does not allow for a satisfactory exchange of information. When ENEL N.V. is to be substituted by another of ENEL’s Subsidiaries, such substitution may only take place if ENEL continues to guarantee the obligations of such Subsidiary. For further details regarding ENEL N.V.’s right of substitution see Condition 16(a)and Condition 16(c). ENEL has a right of substitution as set out in Condition 16(b). ENEL may, at any time, without the consent of the Noteholders or the Couponholders, substitute for itself as principal debtor under the Notes and Coupons any of its Subsidiaries provided that ENEL shall guarantee the obligations of such Subsidiary. The relevant Subsidiary (failing which, ENEL) shall indemnify each Noteholder and Couponholder against any adverse tax consequences of such a substitution, except that neither the relevant Subsidiary nor ENEL shall be liable under such indemnity to pay any additional amounts either on account of “imposta sostitutiva” or on account of any other withholding or deduction in the event of payment of interest or other amounts paid to a non- Italian resident legal entity or a non-Italian resident individual which is resident in a country which does not allow for a satisfactory exchange of information. For further details regarding ENEL’s right of substitution, see Condition 16(b). Notes may be issued in bearer or registered form (respectively “Bearer Notes” and “Registered Notes”). The maximum aggregate nominal amount of all Notes from time to time outstanding under the Programme will not exceed €35,000,000,000 (or its equivalent in other currencies calculated as described herein), subject to increase as described herein. The Notes may be issued on a continuing basis to one or more of the Dealers specified under “Summary of the Programme” and any additional Dealer appointed under the Programme from time to time by the relevant Issuer (each a “Dealer” and together the “Dealers”), which appointment may be for a specific issue or on an ongoing basis. References in this Offering Circular to the “relevant Dealer” shall, in the case of an issue of Notes being (or intended to be) subscribed by more than one Dealer, be to all Dealers agreeing to purchase such Notes. An investment in Notes issued under the Programme involves certain risks. For a discussion of these see “Risk Factors”. This Offering Circular has been approved by the Central Bank of Ireland (the “Central Bank”), as competent authority under the Prospectus Directive 2003/71/EC (the “Prospectus Directive”). The Central Bank only approves this Offering Circular as meeting the requirements imposed under Irish and EU law pursuant to the Prospectus Directive. Such approval relates only to Notes which are to be admitted to trading on the regulated market of the Irish Stock Exchange or other regulated markets for the purposes of Directive 2004/39/EC or which are to be offered to the public in any Member State of the European Economic Area. Application has been made to the Irish Stock Exchange for Notes issued under the Programme to be admitted to the Official List and trading on its regulated market. Notice of the aggregate nominal amount of Notes, interest (if any) payable in respect of Notes, the issue price of Notes and any other terms and conditions not contained herein which are applicable to each Tranche (as defined under “Terms and Conditions of the Notes”) of Notes will be set out in the final terms (the “Final Terms”) which, with respect to Notes to be listed on the Irish Stock Exchange, will be filed with the Central Bank. The Programme provides that Notes may be listed or admitted to trading, as the case may be, on such other or further stock exchanges or markets as may be agreed between the relevant Issuer and the Guarantor (where ENEL is not the relevant Issuer) and the relevant Dealer. The relevant Issuer may also issue unlisted Notes and/or Notes not admitted to trading on any market. The Notes issued by ENEL will constitute “obbligazioni” pursuant to Article 2410, and the Articles that follow such Article 2410, of the Italian Civil Code, which relate to the issuance of “obbligazioni” by corporations in Italy. The Notes have not been, and will not be, registered under the U.S. Securities Act of 1933, as amended (the “Securities Act”), or with any securities regulatory authority of any state or other jurisdiction of the United States, and the Notes may include bearer notes that are subject to U.S. tax law requirements. Subject to certain exceptions, the Notes may not be offered or sold or, in the case of bearer notes, delivered within the United States or for the account or benefit of U.S. Persons (as defined in Regulation S under the Securities Act (“Regulation S”)). The Notes will be offered and sold in offshore transactions to non-U.S. persons outside the United States in reliance on Regulation S under the Securities Act and, if so specified in the applicable Final Terms, within the United States to “qualified institutional buyers” (as defined in Rule 144A under the Securities Act) (“Rule 144A”), in transactions exempt from the registration requirements of the Securities Act. For a description of these and certain further restrictions on offers, sales and transfers of Notes and distribution of this Offering Circular see “Subscription and Sale and Selling and Transfer Restrictions”. The Notes have not been approved or disapproved by the U.S. Securities and Exchange Commission, any state securities commission in the United States or any other U.S. regulatory authority, nor has any of the foregoing authorities passed upon or endorsed the merits of the offering of Notes or the accuracy or the adequacy of this Offering Circular. Any representation to the contrary is a criminal offence. The relevant Issuer and the Guarantor (where ENEL is not the relevant Issuer) may agree with any Dealer that Notes may be issued in a form not contemplated by the Terms and Conditions of the Notes herein, which Notes will not be admitted to trading on a regulated market in the European Economic Area nor offered to the public in the European Economic Area. ENEL’s long-term debt is currently rated “BBB+” (negative outlook) by Standard & Poor’s Credit Market Services Italy s.r.l. (“S&P”), “BBB+” (rating watch negative) by Fitch Ratings Ltd (“Fitch”) and “Baa2” (negative outlook) by Moody’s Investors Service Ltd (“Moody’s”). Each of Moody’s, S&P and Fitch is established in the European Union and registered under Regulation (EC) No.1060/2009 (as amended) (the “CRA Regulation”) and as such is included in the list of credit rating agencies published by the European Securities and Markets Authority on its website (at http://www.esma.europa.eu/page/List-registered-and-certified-CRAs) in accordance with the CRA Regulation.Tranches of Notes to be issued under the Programme will be rated or unrated. Where a Tranche of Notes is to be rated, such rating will not necessarily be the same as the rating assigned to Notes already issued. Where a Tranche of Notes is rated, the applicable rating(s) will be specified in the relevant Final Terms.