Filed Pursuant to Rule 424(b)(5)
Registration No. 333-224360
333-224360-01

PROSPECTUS SUPPLEMENT

(TO PROSPECTUS DATED APRIL 20, 2018)

TELEFÓNICA EMISIONES, S.A.U.

(incorporated with limited liability in the Kingdom of Spain)

$1,250,000,000 FIXED RATE SENIOR NOTES DUE 2049

guaranteed by:

TELEFÓNICA, S.A.

(incorporated with limited liability in the Kingdom of Spain)

The $1,250,000,000 fixed rate senior notes due 2049 (the “Notes”) will bear interest at 5.520% per year. Interest on the Notes will be payable on March 1 and September 1 of each year, beginning on September 1, 2019, until March 1, 2049 (the “Maturity Date”), and on the Maturity Date. The Notes will mature at 100% of their principal amount on the Maturity Date.

Subject to applicable law, the Notes will be unsecured and will rank equally in right of payment with other unsecured unsubordinated indebtedness of Telefónica Emisiones, S.A.U. (the “Issuer”). The Guarantee (as defined herein) as to the payment of principal, interest and Additional Amounts (as defined herein) will be a direct, unconditional, unsecured and unsubordinated obligation of our parent, Telefónica, S.A. (the “Guarantor”), and, subject to applicable law, will rank equally in right of payment with its other unsecured unsubordinated indebtedness.

For a more detailed description of the Notes and the Guarantee, see “Description of the Notes and the Guarantee” beginning on S-18.

Investing in the Notes involves risks. See “Risk Factors” beginning on S-13.

Potential investors should review the summary set forth in “Taxation”, beginning on S-35, regarding the tax treatment in Spain of income obtained in respect of the Notes. In particular, income obtained in respect of the Notes will be exempt from Spanish withholding tax provided certain requirements are met, including that the Paying Agent (as defined herein) provides us and the Guarantor with certain documentation in a timely manner.

None of the U.S. Securities and Exchange Commission (the “SEC”), any state securities commission or any other regulatory body has approved or disapproved of these securities or passed upon the adequacy or accuracy of this Prospectus Supplement or the accompanying Prospectus. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the Notes to purchasers in registered book entry form through the facilities of The Depository Trust Company (“DTC”) for credit to accounts of direct or indirect participants in DTC, including Clearstream Banking, société anonyme, Luxembourg, and Euroclear Bank S.A./N.V., on or about March 1, 2019, which will be the third Business Day (as defined herein) following the date of pricing of the Notes (such settlement period being referred to as “T+3”). Pursuant to Rule 15c6-1 under the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”), trades in the secondary market are generally required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes on the date of this Prospectus Supplement will be required to specify alternative settlement arrangements to prevent a failed settlement. Such purchasers should consult their own advisors. Beneficial interests in the Notes will be shown on, and transfers thereof will be effected only through, records maintained by DTC and its participants. Application will be made for the Notes described in this Prospectus Supplement to be listed on the New York Stock Exchange (the “NYSE”).

Joint Book-Running Managers

The date of this Prospectus Supplement is February 26, 2019.

TABLE OF CONTENTS

PROSPECTUS SUPPLEMENT

PROSPECTUS

i

IMPORTANT NOTICE ABOUT INFORMATION IN THIS PROSPECTUS SUPPLEMENT

AND THE ACCOMPANYING PROSPECTUS

This document is in two parts. The first part is this Prospectus Supplement, which describes the specific terms of this offering of the Notes and also adds to and updates information contained in the accompanying Prospectus and the documents incorporated by reference in this Prospectus Supplement and the accompanying Prospectus. The second part is the accompanying Prospectus which gives more general information, some of which does not apply to this offering.

If the description of this offering varies between this Prospectus Supplement and the accompanying Prospectus, you should rely on the information contained in or incorporated by reference in this Prospectus Supplement.

In this Prospectus Supplement and any other prospectus supplements, the “Issuer”, “we”, “us” and “our” refer to Telefónica Emisiones, S.A.U., “Telefónica” or the “Guarantor” refer to Telefónica, S.A. and the “Telefónica Group” refers to Telefónica and its consolidated subsidiaries, in each case except as otherwise indicated or the context otherwise requires. We use the word “you” to refer to prospective investors in the securities.

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RISK FACTORS

In addition to the other information contained in or incorporated into this Prospectus Supplement and the accompanying Prospectus, prospective investors should carefully consider the risks described below as well as those described in Item 3.D. in the Form 20-F before making any investment decisions. The risks described below are not the only ones that we or the Guarantor face. Additional risks not currently known to us or the Guarantor or that we or the Guarantor currently deem immaterial may also impair our, or the Guarantor’s, business and results of operations. Our, or the Guarantor’s, business, financial condition and results of operations could be materially adversely affected by any of these risks, and investors could lose all or part of their investment.

Risks Relating to the Guarantor, the Issuer and the Notes

We will have to withhold Spanish withholding tax from any income payment on the Notes unless certain requirements are met.

Under the regulations established by Royal Decree 1065/2007, as amended by Royal Decree 1145/2011, income obtained in respect of the Notes will not be subject to withholding tax in Spain provided certain requirements are met, including that the Paying Agent provides us and the Guarantor, in a timely manner, with a duly executed and completed Payment Statement. See “Taxation—Spanish Tax Considerations—Compliance with Certain Requirements in Connection with Income Payments”. The supplemental indenture to be entered into in respect of the Notes will provide for the timely provision by the Paying Agent of a duly executed and completed Payment Statement in connection with each payment of income under the Notes, and set forth certain procedures agreed by us, the Guarantor and the Paying Agent which aim to facilitate such process, along with a form of the Payment Statement to be used by the Paying Agent. See “Description of the Notes and the Guarantee—Maintenance of Tax Procedures”. However, these procedures may prove ineffective. Furthermore, changes in Spanish tax laws or regulations or in the administrative interpretation thereof may render these procedures inadequate or insufficient to allow payments of income under the Notes to be made free and clear of Spanish withholding tax. Prospective investors should note that none of the Issuer, the Guarantor or the underwriters accepts any responsibility relating to the procedures established for the timely provision by the Paying Agent of a duly executed and completed Payment Statement in connection with each payment of income under the Notes. Accordingly, none of the Issuer, the Guarantor or the underwriters will be liable for any damage or loss suffered by any beneficial owner who would otherwise be entitled to an exemption from Spanish withholding tax but whose income payments are nonetheless paid net of Spanish withholding tax (currently at the rate of 19%) because these procedures prove ineffective. Moreover, none of the Issuer or the Guarantor will pay any Additional Amounts with respect to any such withholding. If a payment of income in respect of the Notes is not exempt from Spanish withholding tax, including due to any failure by the Paying Agent to deliver a duly executed and completed Payment Statement, beneficial owners may have to apply directly to the Spanish tax authorities for any refund to which they may be entitled pursuant to the Direct Refund from Spanish Tax Authorities Procedures set forth in Annex A hereto.

If the Notes are not listed on a regulated market, multilateral trading facility or other organized market no later than 45 days prior to the first Interest Payment Date, we or the Guarantor, as the case may be, may, at our respective option, redeem the Notes without penalty or premium. We may also redeem all or a portion of the Notes at our election without penalty or premium if such redemption takes place on or after the Par Call Date.

If the Notes are not listed on a regulated market, multilateral trading facility or other organized market no later than 45 days prior to the first Interest Payment Date, we or the Guarantor, as the case may be, may, at our respective option and having given not less than 15 days’ notice (ending on a day which is no later than the Business Day immediately preceding such first Interest Payment Date) to the holders of the Notes (which notice shall be irrevocable), redeem all of the outstanding Notes at a redemption price equal to their principal amount

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(without any penalty or premium in respect thereof), together with accrued and unpaid interest, if any, thereon to but excluding the redemption date. In the event of a Redemption for Failure to List of the Notes, we or the Guarantor, as the case may be, will be required to withhold tax and will pay any income (as such term is defined under “Taxation—Spanish Tax Considerations—Compliance with Certain Requirements in Connection with Income Payments”) in respect of the Notes redeemed net of the Spanish withholding tax applicable to such payments (currently 19%). If this were to occur, beneficial owners would have to follow the Direct Refund from Spanish Tax Authorities Procedures set forth in Annex A hereto in order to apply directly to the Spanish tax authorities for any refund to which they may be entitled. We have committed to use reasonable best efforts to make an application to list the Notes on the NYSE; however, no such listing can be assured. See “Description of the Notes and the Guarantee—Redemption and Purchase—Early Redemption for Taxation or Listing Reasons”. For a description of the Spanish tax treatment applicable to the income, if any, paid on the Notes upon an early redemption of such Notes as a result of such Notes not being listed on a regulated market, multilateral trading facility or other organized market, see “Taxation—Spanish Tax Considerations—Tax Rules for Notes not Listed on a Regulated Market, Multilateral Trading Facility or Other Organized Market”.

We may redeem all or a portion of the Notes at our election at any time or from time to time as set forth in “Description of the Notes and the Guarantee—Redemption and Purchase—Optional Redemption of the Notes”. If we elect to redeem all or a portion of the Notes on or after the Par Call Date (as defined herein), we will pay a redemption price equal to their principal amount, together with accrued and unpaid interest, if any, thereon to but excluding the redemption date.

If a public market for the Notes does not develop, your ability to resell the Notes and the market price of the Notes may be adversely affected.

The Notes are a new issue of securities for which a public market may not develop. If the Notes are traded after their initial issuance, they may trade at a discount from their initial offering price, depending on prevailing interest rates, the market for similar securities, general economic conditions, our performance and other factors. Although applications will be made for the Notes to be admitted to listing on the NYSE, there is no assurance that such applications will be accepted or that the Notes will be so admitted. We have been advised by the underwriters that they intend to make a market in the Notes after the completion of the offering. However, they are under no obligation to do so and may discontinue any market-making activities at any time without any notice. We cannot assure the liquidity of the trading market for the Notes or that an active public market for the Notes will develop. If an active public trading market for the Notes does not develop, the market price and liquidity of the Notes may be adversely affected.

Your right to receive payments of interest and principal on the Notes and the Guarantee is effectively junior to certain other obligations of the Issuer and the Guarantor.

The Notes will constitute our direct, unconditional, unsubordinated and unsecured obligations and will rank pari passu without any preference among themselves and (subject to any applicable statutory exceptions) our payment obligations under the Notes will rank at least pari passu with all our other unsecured and unsubordinated indebtedness, present and future, except as our obligations may be limited by Spanish bankruptcy, insolvency, reorganization or other laws relating to or affecting the enforcement of creditors’ rights generally in the Kingdom of Spain. Pursuant to the Guarantee, the Guarantor will unconditionally and irrevocably guarantee the due payment of all sums expressed to be payable by us under the Notes on an unsubordinated and unconditional basis. The obligations of the Guarantor under the Guarantee in respect of the Notes will constitute direct, unconditional, unsubordinated and unsecured obligations of the Guarantor under the Guarantee and will rank pari passu without any preference among such obligations of the Guarantor under the Guarantee in respect of the Notes and at least pari passu with all other unsubordinated and unsecured indebtedness and monetary obligations involving or otherwise related to borrowed money of the Guarantor, present and future; provided that the obligations of the Guarantor under the Guarantee in respect of the Notes will be effectively subordinated to those obligations that are preferred under the Insolvency Law. However, the Notes

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and the Guarantee will be effectively subordinated to all of, respectively, our and the Guarantor’s secured indebtedness, to the extent of the value of the assets securing such indebtedness, and other obligations that rank senior under Spanish law. At December 31, 2018, we had no outstanding secured indebtedness and approximately €34 billion of outstanding unsecured indebtedness and the Guarantor had no outstanding consolidated secured indebtedness and approximately €55 billion of outstanding consolidated unsecured indebtedness. The Guarantor is a holding company and conducts substantially all of its operations through its subsidiaries. As a result, the Guarantee is also structurally subordinated to all indebtedness of subsidiaries of Telefónica insofar as any right of Telefónica to receive any assets of any of its subsidiaries or equity affiliates upon Telefónica’s liquidation, dissolution, winding up, receivership, reorganization or any bankruptcy, insolvency or similar proceedings (and the consequent right of the holders of the Guarantee to participate in the distribution of, or to realize proceeds from, those assets) will be effectively subordinated to the claims of any such subsidiary’s or equity affiliate’s creditors (including trade creditors and holders of debt or guarantees issued by such subsidiary).

You may be unable to enforce judgments obtained in U.S. courts against us or the Guarantor.

All of our directors and all the directors and executive officers of the Guarantor are not residents of the United States, and substantially all the assets of these companies are located outside of the United States. As a consequence, you may not be able to effect service of process on these non-U.S. resident directors and executive officers in the United States or to enforce judgments against them outside of the United States. We have been advised by our Spanish counsel, Uría Menéndez Abogados, S.L.P., that there is doubt as to whether a Spanish court would enforce a judgment of liability obtained in the United States against us or the Guarantor predicated solely upon the securities laws of the United States. See “Enforceability of Certain Civil Liabilities” in the accompanying Prospectus.

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USE OF PROCEEDS

We expect that the net proceeds from this offering, after deducting the underwriting discount but before expenses, will be approximately $1,239,687,500. We will deposit the net proceeds on a permanent basis with the Guarantor. The Guarantor will use such net proceeds for general corporate purposes.

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CAPITALIZATION AND INDEBTEDNESS

The following table sets forth the cash and cash equivalents and the capitalization and indebtedness of the Guarantor on a consolidated basis in accordance with IFRS as issued by the IASB at December 31, 2018 and as adjusted to reflect the issuance of $1,250,000,000 aggregate principal amount of Notes (converted into euros at the European Central Bank buying rate for euros at December 31, 2018 of $1.1450 per €1.00) and the application of the net proceeds thereof as described in “Use of Proceeds”. The European Central Bank buying rate for euros at February 22, 2019 was $1.1325 per €1.00.

The following reflects the issuances of securities by the Telefónica Group and the other principal transactions affecting the capitalization of the Guarantor (on a consolidated basis) after December 31, 2018, none of which are reflected in the table above:

The Telefónica Group intends to continue to access the capital markets from time to time as market and other conditions permit and may make one or more additional offerings of securities outside the United States around the time of this offering.

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DESCRIPTION OF THE NOTES AND THE GUARANTEE

The following is a summary of the terms of the Notes. The Notes will be issued under an indenture (the “Base Indenture”), dated April 20, 2018 among us, Telefónica and The Bank of New York Mellon, a New York banking corporation, as trustee (in such capacity, the “Trustee”), as supplemented by the First Supplemental Indenture, to be dated as of or around March 1, 2019, among us, Telefónica and The Bank of New York Mellon, as Trustee, Transfer Agent, Registrar and Paying Agent (the Base Indenture, as supplemented, the “Indenture”). The Notes will be issued pursuant to the resolutions adopted by our sole shareholder on April 13, 2018 and reflected in an executed public deed of issuance that will be registered with the Mercantile Registry of Madrid (the “Public Deed of Issuance”). The Notes shall be designated as our Series V debt securities in the Public Deed of Issuance.

The following summary of material provisions of the Notes, the Guarantee and the Indenture does not purport to be complete and is subject, and is qualified in its entirety by reference, to all of the provisions of the Notes, the Guarantee and the Indenture, including the definitions of the terms provided therein. Upon request, you may obtain a copy of the Public Deed of Issuance and the Indenture from the Trustee.

General

The Notes will be issued in $1,250,000,000 aggregate principal amount and will mature at 100% of their principal amount on the Maturity Date. The Notes may be offered and sold in multiple series with different maturities, interest rates and other terms. The Notes will be issued only in registered form in denominations of $1,000 and integral multiples thereof. The Notes will not be entitled to the benefit of any sinking fund or similar custodial arrangement.

The Indenture provides that, in addition to the Notes, notes, bonds and other evidences of indebtedness of other series may in the future be issued thereunder without limitation as to aggregate principal amount. Unless otherwise provided pursuant to the Indenture, we may from time to time, without the consent of the holders of the Notes, create and issue further Notes having the same terms and conditions as the previously issued Notes in all respects (or in all respects except for the issue date, the first Interest Payment Date and/or the issue price), so that such further issue shall be consolidated and form a single series with the outstanding Notes; provided, however, that any such further issuance will only be made if either such additional Notes are issued with no more than de minimis original issue discount for U.S. federal income tax purposes or such further issuance is a “qualified reopening” as such term is defined under U.S. Treasury Regulations Section 1.1275-2(k)(3) promulgated under the U.S. Internal Revenue Code of 1986, as amended (the “Code”).

Telefónica, as Guarantor, will unconditionally and irrevocably guarantee the due payment of all sums expressed to be payable by us under the Notes on an unsubordinated and unconditional basis.

Payment of Interest

The Notes will bear interest from March 1, 2019 or from the most recent date through which we have paid or provided for interest on the Notes of such series.

The Notes will bear interest at an annual rate of 5.520%. We or the Guarantor, as the case may be, will pay interest on the Notes semi-annually on March 1 and September 1 of each year, beginning on September 1, 2019, until the Maturity Date, and on the Maturity Date. Each such date is referred to as an “Interest Payment Date”. Interest on the Notes will be computed on the basis of a 360-day year of twelve 30-day months. Except as described below for the first Interest Payment Date, on each Interest Payment Date, we or the Guarantor, as the case may be, will pay interest on the Notes for the period commencing on and including the immediately preceding Interest Payment Date and ending on and including the day immediately preceding that Interest Payment Date. On the first Interest Payment Date for the Notes, we or the Guarantor, as the case may be, will pay

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interest for the period beginning on and including the issuance date thereof and ending on and including August 31, 2019. Interest payments in respect of the Notes will be exempt from Spanish withholding tax, provided certain requirements are met (including that the Paying Agent provides us and the Guarantor, in a timely manner, with a duly executed and completed Payment Statement). See “Taxation—Spanish Tax Considerations—Compliance with Certain Requirements in Connection with Income Payments”.

If any Interest Payment Date falls on a day that is not a Fixed Rate Business Day, the interest payment shall be postponed to the next day that is a Fixed Rate Business Day, and no interest on such payment shall accrue for the period from and after such Interest Payment Date. For the purposes of this Prospectus Supplement, a “Fixed Rate Business Day” is a day other than a Saturday, a Sunday or any other day on which banking institutions in New York, New York, London, England or the city of Madrid, Spain are authorized or required by law or executive order to close.

If the Maturity Date is not a Fixed Rate Business Day, payment of principal and interest on the Notes will be made on the next succeeding day that is a Fixed Rate Business Day, and no interest will accrue for the period from and after such Maturity Date.

Interest on each Note will be paid only to the person in whose name such Note was registered at the close of business on the tenth New York Business Day prior to the applicable Interest Payment Date (each such date, a “Regular Record Date”). Notwithstanding the Regular Record Dates established in the terms of the Notes, we understand that, through their accounting and payment procedures, DTC will, in accordance with their customary procedures, credit interest payments received by DTC on any date on which interest is paid based on DTC participant holdings of the Notes on the close of business on the New York Business Day immediately preceding each such date. A “New York Business Day” means a day other than a Saturday, a Sunday or any other day on which banking institutions in New York, New York are authorized or required by law or executive order to close. A “Business Day” means a day other than a Saturday, a Sunday or any other day on which banking institutions in New York, New York or the city of Madrid, Spain, are authorized or required by law or executive order to close.

Payments of Additional Amounts

All amounts payable (whether in respect of principal, redemption amount, interest or otherwise) in respect of the Notes and the Guarantee by us or the Guarantor will be made free and clear of and without withholding or deduction for or on account of any present or future taxes, duties, assessments or governmental charges of whatever nature imposed or levied by or on behalf of the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax, unless the withholding or deduction of such taxes, duties, assessments or governmental charges is required by law. Subject to the following paragraph, in the event that such withholding or deduction is required by law, we or the Guarantor shall pay such additional amounts (“Additional Amounts”) as will result in receipt by the holders of such Notes of such amounts as would have been received by them had no such withholding or deduction been required.

However, we and the Guarantor will not be required to pay any Additional Amounts in respect of any Note:

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provided further that Additional Amounts in respect of the Notes will also not be paid with respect to any payment to a holder of such Notes who is a fiduciary, a partnership, a limited liability company or anything other than the sole beneficial owner of that payment, to the extent to which that payment would be required by the laws of the Kingdom of Spain (or any political subdivision thereof or any authority or agency therein or thereof having power to tax) to be included in the income, for tax purposes, of a beneficiary or settlor with respect to the fiduciary, a member of that partnership, an interest holder in that limited liability company or a beneficial owner who would not have been entitled to any Additional Amounts had it been the holder.

For the purposes of (iv) above, the “Relevant Date” means, in respect of any payment, the date on which such payment first becomes due and payable, but if the full amount of the moneys payable has not been received by the Paying Agent on or prior to such due date, it means the first date on which the full amount of such moneys having been so received and being available for payment to holders, notice to that effect is duly given to the holders in accordance with the Indenture.

Any reference to principal, interest or premium shall be deemed to include Additional Amounts to the extent payable in respect thereof.

Form, Transfer and Registration

The Notes will be initially represented by one or more Global Certificates which will be deposited with a custodian for DTC, and Notes represented thereby will be registered in the name of Cede & Co., as nominee of DTC, for the accounts of DTC participants. Except as provided below with respect to exchanges of beneficial interests in Notes represented by a Global Certificate for Certificated Notes (as defined below), Notes represented by a Global Certificate may not be transferred except as a whole by DTC as the depositary for such Global Certificate to a nominee of DTC, by a nominee of DTC to DTC or another nominee of DTC or by DTC or any such nominee to a successor of DTC or a nominee of such successor.

Ownership of beneficial interests in a Note represented by a Global Certificate will be limited to persons, called participants, that have accounts with DTC or persons that may hold interests through DTC participants.

Upon the issuance of the Notes represented by a Global Certificate, DTC will credit, on its book-entry registration and transfer system, the applicable participants’ accounts with the respective principal or face amounts of such Notes beneficially owned by the participants. Any dealers, underwriters or agents participating

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in the distribution of such Notes will designate the accounts to be credited. Ownership of beneficial interests in a Note represented by a Global Certificate will be shown on, and the transfer of ownership interests will be effected only through, records maintained by DTC, with respect to interests of participants, and on the records of participants, with respect to interests of persons holding through participants.

So long as the Notes are represented by a Global Certificate, DTC or its nominee, as the case may be, will be considered the sole holder of the Notes represented by such Global Certificate for all purposes under the Indenture. Except as described below, owners of beneficial interests in a Note represented by a Global Certificate will not be entitled to have the Notes represented by such Global Certificate registered in their names, will not receive or be entitled to receive physical delivery of Certificated Notes and will not be considered the holders of such Notes under the Indenture. Accordingly, each person owning a beneficial interest in a Note represented by a Global Certificate must rely on the procedures of DTC and, if that person is not a participant, on the procedures of the participant through which the person owns its interest, to exercise any rights of a beneficial owner under the Indenture.

To facilitate subsequent transfers, all Notes represented by a Global Certificate will be registered in the name of DTC’s nominee, Cede & Co. The deposit of the Notes with a custodian for DTC and their registration in the name of Cede & Co. effect no change in beneficial ownership. DTC has no knowledge of the actual beneficial owners of such Notes. DTC’s records reflect only the identity of the direct participants to whose accounts beneficial interests in such Notes are credited, which may or may not be the beneficial owners. The participants will remain responsible for keeping account of their holdings on behalf of their customers.

We or the Guarantor, as the case may be, will make payments due on the Notes represented by a Global Certificate to Cede & Co., as nominee of DTC, in immediately available funds. DTC’s practice upon timely receipt of any payment of principal, interest or other distribution in respect of the Notes represented by a Global Certificate is to credit participants’ accounts in amounts proportionate to their respective beneficial interests in such Notes represented by a Global Certificate as shown on the records of DTC. Payments by participants to owners of beneficial interests in any Notes represented by a Global Certificate held through participants will be governed by standing customer instructions and customary practices, as is now the case with the securities held for the accounts of customers registered in “street name”, and will be the responsibility of those participants. Payment to Cede & Co. is the responsibility of the Issuer or the Guarantor, as the case may be. Disbursement of such payments to direct participants is the responsibility of Cede & Co. Disbursement of such payments to beneficial owners of Notes is the responsibility of direct and indirect participants. None of us, the Guarantor, the Trustee or any of our respective agents will have any responsibility or liability for any aspect of the records relating to payments made on account of beneficial interests in any Notes represented by a Global Certificate or for maintaining, supervising or reviewing any records relating to those beneficial interests.

Transfers between DTC participants will be reflected in accordance with DTC’s procedures.

We and the Guarantor expect that DTC will take any action permitted to be taken by a holder only at the direction of one or more participants to whose account the DTC interests in any Notes represented by the applicable Global Certificate are credited and only in respect of such portion of the aggregate principal amount of the Notes as to which such participant or participants has or have given such direction.

Beneficial interests in Notes represented by a Global Certificate will be exchangeable for Notes represented by individual security certificates (“Definitive Certificates”) and registered in the name or names of owners of such beneficial interests as specified in instructions provided by DTC to the Trustee (“Certificated Notes”) only if: (i) DTC notifies us that it is unwilling or unable to continue to act as depositary or that it is no longer a clearing agency registered under the Exchange Act and, in either case, a successor depositary is not appointed by us within 120 days after the date of such notice from DTC, (ii) we notify the Trustee in writing that we have reasonably elected to cause the issuance of Certificated Notes or (iii) there shall have occurred and be continuing an Event of Default (as defined below) with respect to the Notes and the Notes will be accelerated in accordance with their terms and the terms of the Indenture.

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In any such instance, an owner of a beneficial interest in the Notes represented by a Global Certificate would be entitled to delivery of Certificated Notes equal in principal amount to that beneficial interest and to have those Certificated Notes registered in its name. Certificated Notes so issued would be issued as registered notes in authorized denominations. Certificated Notes, if issued, could be transferred by presentation of Definitive Certificates representing such Certificated Notes for registration to the Trustee at its offices in the Borough of Manhattan, the City of New York and such Definitive Certificates would need to be duly endorsed by the applicable holder or his attorney duly authorized in writing, or accompanied by a written instrument or instruments of transfer in form satisfactory to the Trustee duly executed by the holder or his attorney duly authorized in writing.

Although we and the Guarantor expect that DTC will continue to perform the foregoing procedures in order to facilitate transfers of interests in each Note represented by a Global Certificate among DTC participants, DTC is under no obligation to perform or continue to perform such procedures, and such procedures may be discontinued at any time. None of us, the Guarantor, the underwriters or the Trustee will have any responsibility for the performance by DTC or their participants or indirect participants of their respective obligations under the rules and procedures governing their operations.

DTC, the world’s largest securities depository, is a limited-purpose trust company organized under the New York Banking Law, a “banking organization” within the meaning of the New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code, and a “clearing agency” registered pursuant to the provisions of Section 17A of the Exchange Act. DTC holds and provides asset servicing for over 3.5 million issues of U.S. and non-U.S. equity issues, corporate and municipal debt issues, and money market instruments (from over 100 countries) that DTC’s participants deposit with DTC. DTC also facilitates the post-trade settlement among its participants of sales and other securities transactions in deposited securities, through electronic computerized book-entry transfers and pledges between its participants’ accounts. This eliminates the need for physical movement of securities certificates. DTC’s participants include both U.S. and non-U.S. securities brokers and dealers, banks, trust companies, clearing corporations, and certain other organizations. DTC is a wholly-owned subsidiary of The Depository Trust & Clearing Corporation (“DTCC”). DTCC is the holding company for DTC, National Securities Clearing Corporation and Fixed Income Clearing Corporation, all of which are registered clearing agencies. DTCC is owned by the users of its regulated subsidiaries. Access to the DTC system is also available to others such as both U.S. and non-U.S. securities brokers and dealers, banks, trust companies, and clearing corporations that clear through or maintain a custodial relationship with a DTC participant, either directly or indirectly. The DTC Rules applicable to its participants are on file with the SEC.

The information in this section concerning DTC and DTC’s book-entry system has been obtained from sources that we and the Guarantor believe to be reliable, but none of us, the Guarantor or the underwriters takes any responsibility for its accuracy or completeness. As stated above, we, the Guarantor, the underwriters and the Trustee assume no responsibility for the performance by DTC or its direct or indirect participants of their respective obligations, including obligations that DTC or its direct or indirect participants have under the rules and procedures that govern DTC’s operations.

Status of the Notes

The Notes will constitute our direct, unconditional, unsubordinated and unsecured obligations and will rank pari passu without any preference among themselves and (subject to any applicable statutory exceptions) our payment obligations under the Notes will rank at least pari passu with all our other unsecured and unsubordinated indebtedness, present and future, except as our obligations may be limited by Spanish bankruptcy, insolvency, reorganization or other laws relating to or affecting the enforcement of creditors’ rights generally in the Kingdom of Spain.

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The Guarantee

Telefónica, as Guarantor, will unconditionally and irrevocably guarantee the due payment of all sums expressed to be payable by us under the Notes on an unsubordinated and unconditional basis, pursuant to a guarantee to be dated as of or around March 1, 2019 (the “Guarantee”). Amounts to be paid by the Guarantor under the Guarantee shall be paid without withholding or deduction for or on account of any present or future taxes, duties, assessments or governmental charges of whatever nature imposed or levied by or on behalf of the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax, unless the withholding or deduction of such taxes, duties, assessments or governmental charges is required by law. In that event, the Guarantor will pay such Additional Amounts as will result in receipt by the holders of Notes of such amounts as would have been received by them had no such withholding or deduction been required, subject to the exceptions described under “—Payments of Additional Amounts” above. The obligations of the Guarantor under the Guarantee are unaffected by any invalidity, irregularity or unenforceability of the Notes or the Indenture, any failure to enforce the provisions of such Notes or the Indenture, or any waivers, modification or indulgence granted to us in respect thereof by the holders of such Notes or the Trustee, or any other circumstance which may otherwise constitute a legal or equitable discharge of a surety or guarantee.

Under the Guarantee, the Guarantor will waive diligence, presentment, demand of payment, filing of claims with a court in the event of our merger or bankruptcy, the benefits of orden, división and excusión under Spanish law, any right to require a proceeding first against us, protest or notice with respect to the Notes, or the indebtedness evidenced thereby and all demands whatsoever, and will covenant that the Guarantee will not be discharged except by payment in full of the principal of, premium, if any, and interest (including Additional Amounts, if any), on such Notes and the Guarantor shall have fully performed all its obligations in accordance with the provisions of the Notes, the Guarantee and the Indenture.

The Guarantor shall be subrogated to all rights of the holders of the Notes and the Trustee against us in respect of any amounts paid to such holders by the Guarantor.

The obligations of the Guarantor under the Guarantee in respect of the Notes will constitute direct, unconditional, unsubordinated and unsecured obligations of the Guarantor and will rank pari passu without any preference among such obligations of the Guarantor under the Guarantee in respect of the Notes and at least pari passu with all other unsubordinated and unsecured indebtedness and monetary obligations involving or otherwise related to borrowed money of the Guarantor, present and future; provided that the obligations of the Guarantor under the Guarantee in respect of the Notes will be effectively subordinated to those obligations that are preferred under the Insolvency Law.

At December 31, 2018, the Guarantor had no outstanding consolidated secured indebtedness and approximately €55 billion of outstanding consolidated unsecured indebtedness. For additional information about the Guarantor’s principal transactions since December 31, 2018, see “Capitalization and Indebtedness”.

Consolidation, Merger, Etc.; Assumption

Neither we nor the Guarantor shall consolidate with or merge (which term shall include for the avoidance of doubt a scheme of arrangement) into any other person or convey, transfer or lease all or substantially all of our respective assets to any person, and neither we nor the Guarantor shall permit any person to consolidate with or merge into us or the Guarantor, convey, transfer or lease all or substantially all of its assets to us or the Guarantor, unless:

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No vote by the holders of the Notes is required for any such consolidation, merger, conveyance, transfer or lease, unless as part of the transaction we or the Guarantor, as applicable, make changes to the Indenture requiring holder approval, as described later under “—Modification and Waiver”. We and the Guarantor may take these actions as part of a transaction involving outside third parties or as part of an internal corporate reorganization. We and the Guarantor may take these actions even if they result in:

We and the Guarantor have no obligation under the Indenture to seek to avoid these results, or any other legal or financial effects that are disadvantageous to holders of the Notes, in connection with a merger, consolidation, sale conveyance or lease of assets that is permitted under the Indenture.

Upon any consolidation of the Issuer or the Guarantor with, or merger of the Issuer or the Guarantor into, any other person or any conveyance, transfer or lease of all or substantially all of the assets of the Issuer or the Guarantor in accordance with the provisions described above, the successor person formed by such consolidation or into which the Issuer or the Guarantor is merged or to which such conveyance, transfer or lease is made shall succeed to, and be substituted for, and may exercise every right and power of, the Issuer or the Guarantor, as the case may be, under the Indenture with the same effect as if such successor person had been named as the Issuer

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or the Guarantor therein, as the case may be, and thereafter, except in the case of a lease, the predecessor person shall be relieved of all obligations and covenants under the Indenture and the Notes or Guarantee, as the case may be.

In the case of any such consolidation, merger, conveyance, transfer or lease, if the acquiring or resulting entity’s jurisdiction of incorporation or residence for tax purposes (the “Taxing Jurisdiction”) is not the Kingdom of Spain, Additional Amounts will be payable under the Notes or the Guarantee, as applicable, for taxes imposed by the acquiring or resulting entity’s Taxing Jurisdiction (subject to exceptions equivalent to those that apply to the obligation to pay Additional Amounts for taxes imposed by the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax described above under the section entitled “—Payments of Additional Amounts”) on payments of any amounts payable (whether in respect of principal, redemption amount, interest or otherwise) in respect of the Notes made on or after the date of the consolidation, merger, conveyance, transfer or lease rather than taxes imposed on those payments by the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax.

Additional Amounts will be payable on interest or principal due prior to the date of the consolidation, merger, conveyance, transfer or lease only for taxes imposed by the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax, subject to the exceptions discussed under “—Payments of Additional Amounts” above. The acquiring or resulting entity will also be entitled to redeem the Notes in the circumstances described below under the section entitled “—Redemption and Purchase—Early Redemption for Taxation or Listing Reasons” for any change or amendment to, or change in the interpretation or administration of, the laws or regulations of such entity’s Taxing Jurisdiction (which change, amendment or change in the interpretation or administration becomes effective on or after the date of the consolidation, merger, conveyance, transfer or lease).

The Guarantor or any subsidiary of the Guarantor may assume our obligations under the Notes without the consent of the holders. Any Notes so assumed, unless assumed directly by the Guarantor, will have the benefit of the Guarantee in respect of such Notes. In the event of an assumption by an entity within a Taxing Jurisdiction other than the Kingdom of Spain, Additional Amounts under the Notes will be payable for taxes imposed by the assuming entity’s Taxing Jurisdiction (subject to exceptions equivalent to those that apply to the obligation to pay Additional Amounts for taxes imposed by the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax described above under the section entitled “—Payments of Additional Amounts”) on payments of any amounts payable (whether in respect of principal, redemption amount, interest or otherwise) in respect of the Notes made on or subsequent to the date of such assumption rather than taxes imposed on these payments by the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax. In the event of such assumption, the Guarantor or the applicable subsidiary of the Guarantor will be entitled to redeem the Notes in the circumstances described in the preceding paragraph.

Additional Amounts will be payable on interest or principal due prior to the date of the assumption only for taxes imposed by the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax, subject to the exceptions discussed under “—Payments of Additional Amounts” above.

An assumption of our obligations under the Notes may be considered for U.S. federal income tax purposes to be an exchange of Notes for new Notes by U.S. beneficial owners of such Notes, resulting in recognition of taxable gain or loss for U.S. federal income tax purposes and other possible adverse tax consequences. U.S. beneficial owners should consult their own tax advisors regarding the U.S. federal, state and local income tax consequences of any assumption.

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Negative Pledge

So long as any of the Notes remains outstanding (as defined in the Indenture), neither we nor the Guarantor will create or will have outstanding any mortgage, pledge, security interest or lien (“Encumbrance”) upon the whole or any part of our respective present or future assets, in order to secure any Relevant Indebtedness (as defined below) issued or guaranteed by us, the Guarantor or by any other person unless the Notes are equally and ratably secured therewith, for as long as such Relevant Indebtedness shall be so secured.

We and the Guarantor are, however, allowed to secure Relevant Indebtedness in the following circumstances:

provided, that nothing in this section shall limit the ability of the Issuer or the Guarantor, as the case may be, to grant or permit to subsist Encumbrances over any or all of their respective present or future assets to secure Relevant Indebtedness issued or guaranteed by the Issuer, the Guarantor or any other person, to the extent that the aggregate principal amounts so secured do not exceed 5% of the Consolidated Net Tangible Assets of the Guarantor (as defined below), as reflected in the most recent balance sheet of the Guarantor (prepared in accordance with generally accepted accounting principles as in effect at the date of such computation and as applied by the Guarantor) prior to the time such Relevant Indebtedness was issued or guaranteed.

“Consolidated Net Tangible Assets of the Guarantor” means, in accordance with generally accepted accounting principles, the total amount of assets of the Guarantor and its consolidated Subsidiaries, including investments in unconsolidated Subsidiaries, after deduction of (i) goodwill, (ii) intangible assets, and (iii) amounts due from stockholders for uncalled capital. Solely for purposes of this definition, “Subsidiary” means any company in respect of which the Guarantor owns, directly or indirectly, more than half of the voting rights of the shares of such company, or when the Guarantor owns half or less of the voting power but controls such company, i.e., has the power to govern the financial and operating policies of such company so as to obtain benefits from its activities.

The term “generally accepted accounting principles” means (i) in the case of our and the Guarantor’s unconsolidated financial statements, the accounting principles generally accepted in the Kingdom of Spain and (ii) in the case of the Guarantor’s consolidated financial statements, International Financial Reporting Standards as adopted by the European Union, in each case as in effect at the date of such computation and as applied by us or the Guarantor, as the case may be.

“Person” means any individual, corporation, limited liability company, partnership, joint venture, trust, unincorporated organization or government or any agency or political subdivision thereof.

“Relevant Indebtedness” means any obligation for the payment of borrowed money which is in the form of, or represented or evidenced by, a certificate of indebtedness or in the form of, or represented or evidenced by, bonds, notes or other securities which, in any of the above cases, is or are, or is or are capable of being, quoted, listed, dealt in or traded on a stock exchange or other recognized securities market. For the avoidance of doubt, any “obligation for the payment of borrowed money” as used in this definition of Relevant Indebtedness does not include obligations of the Issuer or the Guarantor which, pursuant to the requirements of law and accounting principles generally accepted in the Kingdom of Spain need not, and are not, reflected in the balance sheet of the Issuer or the Guarantor, as the case may be.

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Redemption and Purchase

Early Redemption for Taxation or Listing Reasons

If, in relation to the Notes, (i) as a result of any change in the laws or regulations of the Kingdom of Spain or any political subdivision thereof or any authority or agency therein or thereof having power to tax, or in the interpretation or administration of any such laws or regulations which becomes effective on or after the date of issuance of the Notes, (x) we or the Guarantor, as the case may be, are or would be required to pay any Additional Amounts or (y) the Guarantor is or would be required to deduct or withhold tax on any payment to us to enable us to make any payment of principal, premium, if any, or interest on the Notes, provided that such payment cannot, with reasonable effort by the Guarantor, be structured to avoid such deduction or withholding and (ii) such circumstances are evidenced by the delivery by us or the Guarantor, as the case may be, to the Trustee of a certificate signed by an authorized officer or director of the Issuer or the Guarantor, as the case may be, stating that such circumstances prevail and describing the facts leading to such circumstances, together with an opinion of independent legal advisers of recognized standing to the effect that such circumstances prevail, we or the Guarantor, as the case may be, may, at our respective option and having given not less than 30 nor more than 60 days’ notice (ending on a day upon which interest is payable) to the holders of the Notes (which notice shall be irrevocable), redeem all of the outstanding Notes at a redemption price equal to their principal amount, together with accrued and unpaid interest, if any, thereon to but excluding the redemption date. No such notice of redemption may be given earlier than 90 days prior to the date on which we or the Guarantor would be obligated to pay such Additional Amounts were a payment in respect of the Notes then due.

In addition, if the Notes are not listed on a regulated market, multilateral trading facility or other organized market no later than 45 days prior to the first Interest Payment Date, we or the Guarantor, as the case may be, may, at our respective option and having given not less than 15 days’ notice (ending on a day which is no later than the Business Day immediately preceding such first Interest Payment Date) to the holders of the Notes (which notice shall be irrevocable), redeem all of the outstanding Notes at their principal amount, together with accrued and unpaid interest, if any, thereon to but not including the redemption date (any such redemption, a “Redemption for Failure to List”); provided that from and including the issue date of the Notes to and including such Interest Payment Date, we will use our reasonable best efforts to obtain or maintain such listing, as applicable.

In the event of a Redemption for Failure to List of the Notes, we or the Guarantor, as the case may be, will be required to withhold tax and will pay any income (as such term is defined under “Taxation—Spanish Tax Considerations—Compliance with Certain Requirements in Connection with Income Payments”) in respect of the Notes redeemed net of the Spanish withholding tax applicable to such payments (currently 19%). If this were to occur, beneficial owners would have to follow the Direct Refund from Spanish Tax Authorities Procedures set forth in Annex A hereto in order to apply directly to the Spanish tax authorities for any refund to which they may be entitled.

For a description of the Spanish tax treatment applicable to the income, if any, paid on the Notes upon an early redemption of the Notes as a result of such Notes not being listed on a regulated market, multilateral trading facility or other organized market, see “Taxation—Spanish Tax Considerations—Tax Rules for Notes not Listed on a Regulated Market, Multilateral Trading Facility or Other Organized Market”.

Optional Redemption of Notes

We may redeem all or a portion of the Notes at our election at any time or from time to time as set forth below. Notice of redemption shall be given by first-class mail postage prepaid, mailed not less than 15 nor more than 60 days prior to the redemption date to each holder of the Notes to be redeemed at his or her address appearing in the register kept by the Trustee. If we redeem all or a portion of the Notes prior to the Par Call Date (as defined below), we will pay a redemption price equal to the greater of:

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If we redeem all or a portion of the Notes on or after the Par Call Date, we will pay a redemption price equal to 100% of the principal amount of such Notes being redeemed plus accrued and unpaid interest thereon to, but excluding, the redemption date of such Notes.

“Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment Banker as having a maturity comparable to the remaining term of the Notes to be redeemed (assuming for this purpose that the Notes matured on the Par Call Date) that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Notes being redeemed.

“Comparable Treasury Price” means, with respect to any redemption date prior to the Par Call Date, (1) the average of the Reference Treasury Dealer Quotations (as defined below) for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (2) if the Independent Investment Banker obtains fewer than three such Reference Treasury Dealer Quotations, the average of all such quotations or, if only one such quotation is obtained, such quotation.

“Independent Investment Banker” means an independent investment banking institution of national standing appointed by us and the Guarantor.

“Par Call Date” means September 1, 2048 (six months prior to the Maturity Date).

“Reference Treasury Dealer” means (1) each of Barclays Capital Inc., Goldman Sachs & Co. LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated and their affiliates or their respective successors, provided that if any of the foregoing shall cease to be a primary U.S. government securities dealer in New York City (a “Primary Treasury Dealer”), we and the Guarantor will substitute therefor another Primary Treasury Dealer and (2) any other Primary Treasury Dealer selected by us and the Guarantor.

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date prior to the Par Call Date, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker by such Reference Treasury Dealer at 5:00 p.m. on the third New York Business Day preceding such redemption date.

“Treasury Rate” means, with respect to any redemption date prior to the Par Call Date, the rate per annum equal to the semi-annual equivalent yield to maturity or, if such equivalent is not available, the interpolated maturity (on a day count basis) of the Comparable Treasury Issue, calculated assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date.

Purchase of Notes

We, the Guarantor or any of the Guarantor’s other subsidiaries may at any time purchase Notes in the open market or otherwise at any price. We are not required to cancel any such Notes purchased by us, the Guarantor or any of the Guarantor’s other subsidiaries, as the case may be.

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Events of Default, Waiver and Notice

“Event of Default”, with respect to the Notes, means any one of the following events which occurs and is continuing:

If any Event of Default shall occur in relation to the Notes (taking into account any applicable grace period), the Trustee or the holders of not less than 25% in principal amount of the outstanding Notes may, by written notice to us, at the Corporate Trust Office (and to the Trustee if given by the holders), declare that the Notes, including principal, any premium thereon and all interest then accrued and unpaid on the Notes, as the case may be, shall be immediately due and payable, whereupon the same shall, to the extent permitted by applicable law, become immediately due and payable, at their principal amount together with all interest, if any, accrued and unpaid thereon and premium, if any, payable in respect thereof without presentment, demand, protest or other notice of any kind, all of which we or the Guarantor, as the case may be, will expressly waive, unless, prior thereto, all Events of Default in respect of the Notes shall have been cured. Such declarations of acceleration may be rescinded and past defaults may be waived, except defaults in payment of principal of, interest on or premium, if any, by holders of a majority of the outstanding principal amount on the Notes pursuant to the procedures and under the conditions described under “—Modification and Waiver” below; provided, however, that the amounts due to the Trustee under the Indenture have been paid. Holders of Notes represented by one or more Global Certificate should consult with their banks or brokers for information on how to give notice or direction to, or make a request of, the Trustee and to make or cancel a declaration of acceleration. The Indenture provides that

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none of the terms of the Indenture will require the Trustee to expend or risk its own funds or otherwise incur personal financial liability in the performance of any of its duties or in the exercise of any of its rights or powers, if there is reasonable ground for believing that the repayment of such funds or adequate indemnity against such liability is not reasonably assured to the Trustee.

Defeasance; Covenant Defeasance

The Notes will be subject to the defeasance and covenant defeasance provisions in the Indenture.

We and the Guarantor shall be deemed to have paid and discharged the entire indebtedness on all the outstanding Notes and the provisions of the Indenture as it relates to such outstanding Notes shall no longer be in effect, and the Trustee, at our expense, shall, upon our order or the order of the Guarantor, execute proper instruments acknowledging the same, when:

provided, however, that a defeasance described above shall not impair or affect (a) the rights of holders of Notes to receive, from the trust funds described in subparagraph (i) above, payment of the principal of (and premium, if

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any) and any installment of principal of (and premium, if any), interest on or Additional Amounts, if any, on the Notes on the stated maturity of such principal or installment of principal of (and premium, if any) or interest, or any mandatory sinking fund payments or analogous payments applicable to the Notes on the day on which such payments are due and payable in accordance with the terms of the Indenture and of the Notes, (b) our and the Guarantor’s obligations with respect to the Notes and Guarantee, respectively, under certain provisions of the Indenture, (c) the rights, powers, trusts, duties and immunities of the Trustee under the Indenture and (d) the provisions of the Indenture relating to the application of trust money.

We and the Guarantor by board resolution may elect to be released from our respective obligations under any specified provisions of the Indenture applicable to the outstanding Notes, and the provisions so specified in such board resolution, as they relate to outstanding Notes, shall no longer be in effect, and the Trustee, at our expense, shall, upon our order or the order of the Guarantor, execute proper instruments acknowledging the same, when:

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From and after the date when the foregoing conditions have been met, we or the Guarantor, as the case may be, may omit to comply with, and shall have no liability in respect of, any term, covenant, condition or limitation set forth in any of the specified provisions of the Indenture with respect to which the covenant defeasance has taken place as contemplated under the Indenture, but the remainder of the Indenture and the notes of any other series will be unaffected thereby.

The Trustee, Transfer Agent, Registrar and Paying Agent

The Bank of New York Mellon will be acting as the Trustee, Transfer Agent, Registrar and Paying Agent for the Notes under, and as such terms are defined in, the Indenture.

In addition to acting as Trustee, The Bank of New York Mellon also acts as depositary, trustee and/or paying agent in connection with various other transactions carried out by us, the Guarantor and certain of our respective affiliates.

Replacement of Notes

If any Certificated Note is lost, stolen, mutilated, defaced or destroyed, it may be replaced at the office of the Trustee subject to applicable laws, on payment by the claimant of the expenses incurred in connection with such replacement and on the terms as to evidence, security, indemnity and otherwise as we, the Guarantor and the Trustee may reasonably require.

Modification and Waiver

Modification Without Consent of Holders

We, the Guarantor and the Trustee may enter into one or more supplemental indentures without the consent of the holders of the Notes under the Indenture to:

Modification with Consent of Holders

With the consent of the holders of not less than a majority in principal amount of the outstanding Notes, we, the Guarantor and the Trustee may add any provisions to, or change in any manner or eliminate any of the

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provisions of, or waive any past defaults with respect to, the Indenture or modify in any manner the rights of the holders of such Notes. However, we, the Guarantor and the Trustee may not make any of the following changes to the Notes without the consent of each holder of each outstanding Note that would be affected by such change:

Maintenance of Tax Procedures

The supplemental indenture to be entered into in respect of the Notes will provide for the timely provision by the Paying Agent of a duly executed and completed Payment Statement in connection with each payment of income under the Notes, and set forth certain procedures agreed by us, the Guarantor and the Paying Agent which aim to facilitate such process, along with a form of the Payment Statement to be used by the Paying Agent. In addition, we and the Guarantor will agree in the supplemental indenture in respect of the Notes to, so long as any principal amount of the Notes remains outstanding, and insofar as it is practicable, maintain, implement or arrange for the implementation of procedures to facilitate the timely provision by the Paying Agent of a duly executed and completed Payment Statement in connection with each payment of income under the Notes or the collection of any other documentation concerning such Notes that may be required under Spanish law to allow payments on such Notes to be made free and clear of Spanish withholding tax. However, neither we nor the Guarantor can assure you that it will be practicable to maintain, implement or arrange for the implementation of any such procedures or that they will be effective, in which case we may be required to make payments in respect of such Notes net of the Spanish withholding tax applicable to such payments (currently 19%).

Under the supplemental indenture to be entered into in respect of the Notes, the Paying Agent must deliver a Payment Statement to us and the Guarantor no later than 1:00 a.m. New York Time on the relevant payment date. If we or the Guarantor, as the case may be, believe that the information contained in the Payment Statement is incomplete or inaccurate or that the Payment Statement is otherwise not in compliance with the applicable regulation, we or the Guarantor will notify the Paying Agent and state the reasons for such belief. Following such notification, the Paying Agent shall deliver to us and the Guarantor a further executed Payment Statement, revised, if necessary, as reasonably determined by the Paying Agent and which the Paying Agent shall reasonably believe to be duly completed, as soon as possible but in any event no later than 9:30 a.m. New York Time on the relevant Payment Date (the “First Statement Deadline”). If the Paying Agent delivers a duly executed and completed Payment Statement to us and the Guarantor by the First Statement Deadline, the relevant payment will be made free and clear of Spanish withholding tax. Otherwise, such payment will be made net of the Spanish withholding tax applicable to such payments (currently 19%).

If the Paying Agent fails or for any reason is unable to deliver a duly executed and completed Payment Statement to us and the Guarantor by the First Statement Deadline, the Paying Agent undertakes to make all

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reasonable efforts to provide an executed Payment Statement to us and the Guarantor, which the Paying Agent shall reasonably believe to be duly completed, as soon as possible but no later than 4:00 p.m. New York time on the 10th calendar day of the month immediately following the relevant payment date (or if such day is not a New York Business Day, the first New York Business Day immediately preceding such day). If we or the Guarantor, as the case may be, believe that the information contained in the Payment Statement is incomplete or inaccurate or that the Payment Statement is otherwise not in compliance with the applicable regulation, we or the Guarantor will notify the Paying Agent and state the reasons for such belief. Following such notification, the Paying Agent shall deliver to us and the Guarantor a further executed Payment Statement, revised, if necessary, as reasonably determined by the Paying Agent and which the Paying Agent shall reasonably believe to be duly completed, as soon as possible but in any event no later than 5:00 p.m. New York Time on the 10th calendar day of the month immediately following the relevant payment date (or if such day is not a New York Business Day, the first New York Business Day immediately preceding such day) (the “Second Statement Deadline”). If we or the Guarantor receive a duly executed and completed Payment Statement by the Second Statement Deadline, we or the Guarantor, as the case may be, will, no later than the 18th calendar day of the month immediately following the relevant payment date (or if such day is not a New York Business Day, the first New York Business Day immediately preceding such day), instruct the Paying Agent to, within one New York Business Day of such date, transfer to each DTC participant the amount initially withheld to such DTC participant for the benefit of beneficial owners.

If the Paying Agent fails or for any reason is unable to deliver a duly executed and completed Payment Statement to us and the Guarantor by the Second Statement Deadline, the Paying Agent shall, within one New York Business Day of the date of the Second Statement Deadline, transfer the amount withheld to us, and beneficial owners will have to follow the Direct Refund from Spanish Tax Authorities Procedures set forth in Annex A hereto in order to apply directly to the Spanish tax authorities for any refund to which they may be entitled.

Prospective investors should note that none of the Issuer, the Guarantor or the underwriters accepts any responsibility relating to the procedures established for the timely provision by the Paying Agent of a duly executed and completed Payment Statement in connection with each payment of income under the Notes. Accordingly, none of the Issuer, the Guarantor or the underwriters will be liable for any damage or loss suffered by any beneficial owner who would otherwise be entitled to an exemption from Spanish withholding tax but whose income payments are nonetheless paid net of Spanish withholding tax because these procedures prove ineffective. Moreover, none of the Issuer or the Guarantor will pay any Additional Amounts with respect to any such withholding.

Notices

Notices to holders will be deemed to be validly given if mailed to them at their respective addresses as recorded in the register kept by the Trustee, and will be deemed to have been validly given on the seventh day after the date of such mailing.

Governing Law

Pursuant to Section 5-1401 of the General Obligations Law of the State of New York, the Indenture, the Notes and the Guarantee shall be governed by, and shall be construed in accordance with, the laws of the State of New York.

Consent to Jurisdiction

We and the Guarantor have irrevocably submitted to the exclusive jurisdiction of any federal or state court in the Borough of Manhattan, the City of New York, and any appellate court from any such court thereof, with respect to any legal suit, action or proceeding based on or arising under the Notes or the Indenture and have agreed that all claims in respect of such suit or proceeding shall be determined in any such court.

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TAXATION

Spanish Tax Considerations

The information provided below does not purport to be a complete analysis of the tax law and practice currently applicable in Spain and does not purport to address the tax consequences applicable to all categories of investors, some of which may be subject to special rules.

Prospective purchasers of the Notes are advised to consult their own tax advisors as to the tax consequences, including those under the tax laws of the country of which they are resident, of purchasing, owning and disposing of Notes.

Prospective investors should also note that the appointment by an investor in Notes, or any person through which an investor holds Notes, of a custodian, collection agent or similar person in relation to such Notes in any jurisdiction may have tax implications. Prospective investors should consult their own tax advisors in relation to the tax consequences for them of any such appointment.

This tax section is based on Spanish law as in effect on the date of this Prospectus Supplement as well as on administrative interpretations thereof, and is subject to any change in such law that may take effect after such date.

This information has been prepared in accordance with the following Spanish tax legislation in force at the date of this Prospectus Supplement and does not take into account specific regulations established by the autonomous regions of Spain or the historic territories of Basque Country or Navarra:

Whatever the nature and residence of the noteholder, the acquisition and transfer of Notes will be exempt from indirect taxes in Spain, i.e., exempt from Transfer Tax and Stamp Duty, in accordance with the Consolidated Text of such tax promulgated by Royal Legislative Decree 1/1993 of September 24 and exempt from Value Added Tax, in accordance with Law 37/1992 of December 28 regulating such tax.

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Individuals with Tax Residency in Spain

Individual Income Tax (Impuesto sobre la Renta de las Personas Físicas)

Both interest periodically received and income derived from the transfer, redemption or repayment of the Notes constitute a return on investment obtained from the transfer of a person’s own capital to third parties in accordance with the provisions of Section 25.2 of the IIT Law, and must be included in the investor’s IIT savings taxable base and taxed at a flat rate of 19% on the first €6,000, 21% on the following €44,000 and 23% for any amount in excess of €50,000.

No withholding on account of IIT will be imposed on interest as well as on income derived from the redemption or repayment of the Notes (except in the case of a Redemption for Failure to List) by individual investors subject to IIT provided that certain requirements are met (including that the Paying Agent provides us and the Guarantor, in a timely manner, with a duly executed and completed Payment Statement). See “—Compliance with Certain Requirements in Connection with Income Payments”. However, income derived from the transfer of the Notes may be subject, under certain circumstances, to a withholding on account of IIT at the rate of 19%. In any event, the individual holder may credit taxes withheld against his or her final IIT liability for the relevant tax year.

Reporting Obligations

We and the Guarantor will comply with the reporting obligations set out in the Spanish tax laws with respect to beneficial owners of the Notes who are individuals resident in Spain for tax purposes.

Net Wealth Tax (Impuesto sobre el Patrimonio)

Spanish resident tax individuals are subject to Spanish Net Wealth Tax (Spanish Law 19/1991), as amended, which imposes a tax on property and rights in excess of €700,000 held on the last day of any year. Spanish tax resident individuals whose net worth is above €700,000 and who hold Notes on the last day of any year would therefore be subject to Spanish Net Wealth Tax for such year at marginal rates varying between 0.2% and 2.5% of the average market value of the Notes during the last quarter of such year.

However, in accordance with article 3 of the Royal Decree-Law 7/2018, of December 28 (“RDL 7/2018”), as from year 2020 and onwards, a full exemption on Spanish Net Wealth Tax applies (bonificación del 100%) relieving taxpayers from formal and filing obligations in relation to this Spanish Net Wealth Tax. Therefore, no Spanish Net Wealth Tax will be applied on the holding of the Notes, unless the application of the full exemption is removed.

Inheritance and Gift Tax (Impuesto sobre Sucesiones y Donaciones)

Individuals who are resident in Spain for tax purposes who acquire ownership or other rights over any Notes by inheritance, gift or legacy will be subject to the Spanish Inheritance and Gift Tax in accordance with the applicable Spanish regional and state rules. The effective tax rate, after applying all relevant factors, ranges between 0% and 81.6% for 2019, depending on relevant factors.

Legal Entities with Tax Residency in Spain

Corporate Income Tax (Impuesto sobre Sociedades)

Both interest periodically accrued and income derived from the transfer, redemption or repayment of the Notes are subject to CIT (at the current general flat tax rate of 25% for 2019) in accordance with the rules for this tax.

No withholding on account of CIT will be imposed on interest as well as on income derived from the redemption or repayment of the Notes (except in the case of a Redemption for Failure to List), by Spanish CIT

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taxpayers provided that certain requirements are met (including that the Paying Agent provides us and the Guarantor, in a timely manner, with a duly executed and completed Payment Statement). See “—Compliance with Certain Requirements in Connection with Income Payments”.

Reporting Obligations

We and the Guarantor will comply with the reporting obligations set out in the Spanish tax laws with respect to beneficial owners of the Notes who are legal persons or entities resident in Spain for tax purposes.

Inheritance and Gift Tax (Impuesto sobre Sucesiones y Donaciones)

Legal entities resident in Spain for tax purposes which acquire ownership or other rights over the Notes by inheritance, gift or legacy are not subject to the Spanish Inheritance and Gift Tax but must include the market value of the Notes in their taxable income for CIT purposes.

Individuals and Legal Entities that are not Tax Resident in Spain

Non-Resident Income Tax (Impuesto sobre la Renta de no Residentes)

If the Notes form part of the assets of a permanent establishment in Spain of a person or legal entity who is not resident in Spain for tax purposes, the tax rules applicable to income deriving from such Notes are, generally, the same as those set out above for Spanish CIT taxpayers. See “—Legal Entities with Tax Residency in Spain—Corporate Income Tax (Impuesto sobre Sociedades)”. Ownership of the Notes by investors who are not resident in Spain for tax purposes will not in itself create the existence of a permanent establishment in Spain.

We and the Guarantor will comply with the reporting obligations set out in the Spanish tax laws with respect to beneficial owners of the Notes who are individuals or legal entities not resident in Spain for tax purposes who act with respect to the Notes through a permanent establishment in Spain.

Both interest payments periodically received and income derived from the transfer, redemption or repayment of the Notes, obtained by individuals or entities who are not resident in Spain for tax purposes and do not act, with respect to the Notes, through a permanent establishment in Spain, are exempt from NRIT and therefore no withholding on account of NRIT will be levied on such income provided certain requirements are met.

In order to be eligible for the exemption from NRIT, certain requirements must be met (including that the Paying Agent provides us and the Guarantor, in a timely manner, with a duly executed and completed Payment Statement), as laid down in Section 44 of Royal Decree 1065/2007. See “—Compliance with Certain Requirements in Connection with Income Payments”. If the Paying Agent fails or for any reason is unable to deliver a duly executed and completed Payment Statement to us and the Guarantor in a timely manner in respect of a payment of income under the Notes, we will withhold Spanish withholding tax at the then-applicable rate (currently 19%) on such payment of income on the Notes and we will not pay Additional Amounts with respect to any such withholding tax.

Beneficial owners not resident in Spain for tax purposes and entitled to exemption from NRIT, but the payment to whom was not exempt from Spanish withholding tax due to the failure by the Paying Agent to deliver a duly executed and completed Payment Statement, will receive a refund of the amount withheld, with no need for action on their part, if the Paying Agent provides us and the Guarantor with a duly executed and completed Payment Statement no later than the Second Statement Deadline. In addition, beneficial owners may apply

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directly to the Spanish tax authorities for any refund to which they may be entitled pursuant to the Direct Refund from Spanish Tax Authorities Procedures set forth in Annex A hereto. Beneficial owners are advised to consult their own tax advisors regarding their eligibility to claim a refund from the Spanish tax authorities and the procedures to be followed in such circumstances.

Net Wealth Tax (Impuesto sobre el Patrimonio)

Spanish non-resident tax individuals are subject to Spanish Net Wealth Tax (Spanish Law 19/1991), as amended, which imposes a tax on property and rights in excess of €700,000 that are located in Spain, or can be exercised within the Spanish territory, on the last day of any year.

However, in accordance with article 3 of the RDL 7/2018, as from year 2020 and onwards, a full exemption on Spanish Net Wealth Tax applies (bonificación del 100%) relieving taxpayers from formal and filing obligations in relation to this Spanish Net Wealth Tax. Therefore, no Spanish Net Wealth Tax will be applied on the holding of the Notes unless the application of the full exemption is removed.

Non-Spanish resident legal entities are not subject to Spanish Net Wealth Tax.

Inheritance and Gift Tax (Impuesto sobre Sucesiones y Donaciones)

Individuals who do not have tax residency in Spain who acquire ownership or other rights over the Notes by inheritance, gift or legacy, and who reside in a country with which Spain has entered into a double tax treaty in relation to Inheritance and Gift Tax will be subject to the provisions of such relevant double tax treaty. The United States did not enter any double tax treaty with Spain in relation to Inheritance and Gift Tax.

If the provisions of the foregoing paragraph do not apply, such individuals will be subject to Inheritance and Gift Tax in accordance with the applicable Spanish regional and state legislation, to the extent that rights deriving from the Notes can be exercised within the Spanish territory. As such, prospective investors should consult their tax advisors.

Non-Spanish tax resident legal entities which acquire ownership or other rights over the Notes by inheritance, gift or legacy are not subject to the Spanish Inheritance and Gift Tax. Such acquisitions will be subject to NRIT (as described above), without prejudice to the provisions of any applicable convention for the avoidance of double taxation entered into by Spain. In general, conventions for the avoidance of double taxation provide for the taxation of this type of income in the country of tax residence of the beneficiary.

Tax Rules for Notes not Listed on a Regulated Market, Multilateral Trading Facility or Other Organized Market

Withholding on Account of IIT, NRIT and CIT

If the Notes are not listed on a regulated market, multilateral trading facility or other organized market on any date on which income in respect of the Notes will be paid (i.e. either an Interest Payment Date or a redemption date), payments of income to beneficial owners in respect of the Notes will be subject to Spanish withholding tax at the then-applicable rate (currently 19%). Beneficial owners which are: (A) residents of a European Union member state other than Spain and obtain such income either directly or through a permanent establishment located in another European Union member state, provided that such beneficial owners (i) do not obtain such income on the Notes through a permanent establishment in Spain and (ii) are not resident of, are not located in, nor obtain income through, a tax haven (as defined by Royal Decree 1080/1991 of July 5 as amended); or (B) residents for tax purposes in a country which has entered into a convention for the avoidance of double taxation with Spain which provides for an exemption from Spanish tax or a reduced withholding tax rate with respect to income payable to any beneficial owner may be entitled to an exemption from, or reduction of,

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such tax. Individuals and entities that may benefit from such exemptions or reduced tax rates should apply directly to the Spanish tax authorities for any refund to which they may be entitled pursuant to the Direct Refund from Spanish Tax Authorities Procedures set forth in Annex A hereto.

Tax Rules for Payments Made by the Guarantor

Payments made by the Guarantor to beneficial owners will be subject to the same tax rules previously set out for payments made by us.

Compliance with Certain Requirements in Connection with Income Payments

As described under “—Individuals and Legal Entities that are not Tax Resident in Spain”, “—Legal Entities with Tax Residency in Spain—Corporate Income Tax (Impuesto sobre Sociedades)” and “—Individuals with Tax Residency in Spain—Individual Income Tax (Impuesto sobre la Renta de las Personas Físicas)”, provided the conditions set forth in Law 10/2014 and Royal Decree 1065/2007 are met (including that the Paying Agent provides us and the Guarantor, in a timely manner, with a duly executed and completed Payment Statement), income paid in respect of the Notes for the benefit of non-Spanish tax resident investors, or for the benefit of Spanish CIT or IIT taxpayers, will not be subject to Spanish withholding tax (other than in the event of a Redemption for Failure to List). For these purposes, “income” means interest paid on an Interest Payment Date or the amount of the difference, if any, between the aggregate redemption price paid upon the redemption of the Notes (or a portion thereof) and the aggregate principal amount of such Notes.

In accordance with sub-section 5 of Section 44 of Royal Decree 1065/2007, a duly executed and completed Payment Statement must be submitted to us and the Guarantor by the Paying Agent at the time of each relevant payment date. In accordance with the form attached as Annex to Royal Decree 1065/2007, the Payment Statement shall include the following information:

In particular, the Paying Agent must certify the information above about the Notes by means of a certificate, the form of which is attached as Annex B to this Prospectus Supplement.

In light of the above, we, the Guarantor and the Paying Agent will enter into a supplemental indenture in respect of the Notes which, among other things, will provide for the timely provision by the Paying Agent of a duly executed and completed Payment Statement in connection with each income payment under the Notes and set forth certain procedures agreed by us, the Guarantor and the Paying Agent which aim to facilitate such process, along with a form of the Payment Statement to be used by the Paying Agent. See “Description of the Notes and the Guarantee—Maintenance of Tax Procedures”.

Prospective investors should note that none of the Issuer, the Guarantor or the underwriters accepts any responsibility relating to the procedures established for the timely provision by the Paying Agent of a duly executed and completed Payment Statement in connection with each payment of income under the Notes. Accordingly, none of the Issuer, the Guarantor or the underwriters will be liable for any damage or loss suffered by any beneficial owner who would otherwise be entitled to an exemption from Spanish withholding tax but whose income payments are nonetheless paid net of Spanish withholding tax because these procedures prove ineffective. Moreover, neither we nor the Guarantor will pay any Additional Amounts with respect to any such withholding tax. See “Risk Factors—Risks Relating to the Guarantor, the Issuer and the Notes—We will have to withhold Spanish withholding tax from any income payment on the Notes unless certain requirements are met”.

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If the Paying Agent fails or for any reason is unable to deliver a duly executed and completed Payment Statement to us and the Guarantor in a timely manner in respect of a payment of income under the Notes, such payment will be made net of the Spanish withholding tax applicable to such payments (currently 19%). If this were to occur, affected beneficial owners will receive a refund of the amount withheld, with no need for action on their part, if the Paying Agent submits a duly executed and completed Payment Statement to us and the Guarantor no later than the 10th calendar day of the month immediately following the relevant payment date. In addition, beneficial owners may apply directly to the Spanish tax authorities for any refund to which they may be entitled pursuant to the Direct Refund from Spanish Tax Authorities Procedures set forth in Annex A hereto.

In addition to the timely provision of a duly executed and completed Payment Statement, the Notes must be admitted to listing on a regulated market, multilateral trading facility or other organized market in order to allow payments on Notes to be made free and clear of Spanish withholding tax. We believe the Notes will comply with this requirement as long as they are listed and admitted to trading on the NYSE. See “—Tax Rules for Notes not Listed on a Regulated Market, Multilateral Trading Facility or Other Organized Market.”

The Proposed Financial Transactions Tax (“FTT”)

On February 14, 2013, the European Commission published a proposal for a Directive for a common FTT in Belgium, Germany, Estonia, Greece, Spain, France, Italy, Austria, Portugal, Slovenia and Slovakia (the “participating Member States”). Estonia has since officially announced its withdrawal from the negotiations.

The proposed FTT has very broad scope. If introduced in the form proposed on February 14, 2013, it could apply to certain dealings in Notes (including secondary market transactions) in certain circumstances. The issuance and subscription of Notes should, however, be exempt.

Under the February 14, 2013 proposal, FTT could apply in certain circumstances to persons both within and outside of the participating Member States. Generally, it would apply to certain dealings in Notes where at least one party to the transaction is established in the territory of a participating Member State and that a financial institution established in the territory of a participating Member State is a party to the transaction, acting either for its own account or for the account of another person or is acting in the name of a party to the transaction. A financial institution may be, or be deemed to be, “established” in a participating Member State in a broad range of circumstances, including (a) by transacting with a person established in a participating Member State or (b) where the financial instrument which is subject to the dealings is issued in a participating Member State.

The FTT proposal remains subject to negotiation between the participating Member States. Additional EU Member States may decide to participate and/or certain of the participating Member States may withdraw. The FTT proposal may therefore be altered prior to any implementation, the timing of which remains unclear. Prospective holders of Notes are advised to seek their own professional advice in relation to the FTT. If introduced, certain dealings in Notes may be subject to FTT, in which case neither we nor the Guarantor would be obliged to pay additional amounts with respect to any Note as a result of imposition of such tax.

Material U.S. Federal Income Tax Considerations

The following is a discussion of material U.S. federal income tax considerations relating to the ownership and disposition of the Notes by U.S. holders (defined below) (and solely to the extent provided under “—U.S. Foreign Account Tax Compliance Withholding,” all prospective investors). This summary does not purport to be a complete analysis of all tax considerations that may be applicable to a decision to acquire the Notes. Except to the extent provided under “—U.S. Foreign Account Tax Compliance Withholding,” this summary applies only to U.S. holders that purchase the Notes in the initial offering at their issue price, which will equal the first price to the public (not including bond houses, brokers or similar persons or organizations acting in the capacity of underwriters, placement agents or wholesalers) at which a substantial amount of the Notes is sold, and hold such Notes as capital assets within the meaning of Section 1221 of the Code.

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This discussion is for general information purposes only. This summary does not address the tax consequences applicable to all categories of investors, some of which may be subject to special rules (for example, certain financial institutions, regulated investment companies, insurance companies, dealers in securities, tax-exempt organizations or traders in securities that elect to mark their securities to market for tax purposes, investors holding the Notes as part of a straddle or other integrated transaction, certain former citizens and residents of the United States, persons required for U.S. federal income tax purposes to conform the timing of income accruals on the Notes to their financial statements under Section 451(b) of the Code, or investors whose functional currency is not the U.S. Dollar). This summary does not address the effects of any state, local or non-U.S. tax laws or any U.S. federal estate, gift, Medicare contribution or alternative minimum tax considerations.

Furthermore, the discussion below is based upon the provisions of the Code and regulations, rulings and judicial decisions as of the date of this offering, and those authorities may be repealed, revoked or modified (possibly with retroactive effect) so as to result in U.S. federal income tax consequences different from those discussed below. The tax treatment applicable to you may vary depending on your particular tax situation or status.

In this discussion, a U.S. holder is for U.S. federal income tax purposes a beneficial owner of a Note that is:

If an entity treated as a partnership for U.S. federal income tax purposes holds Notes, the U.S. federal income tax treatment of a partner generally will depend upon the status of the partner and the activities of the partnership. If you are a partnership or partner of a partnership holding Notes, you should consult your tax advisor.

Prospective investors should consult their tax advisors regarding the U.S. federal income tax consequences of the ownership and disposition of Notes in light of their own particular circumstances, as well as the effect and applicability of any state, local or non-U.S. tax laws.

Interest Payments

It is expected, and this disclosure assumes, that the Notes will be issued without original issue discount for U.S. federal income tax purposes. Interest paid to a U.S. holder of Notes (including any Spanish tax withheld and any Additional Amounts paid with respect thereto) generally will be includible in such U.S. holder’s income as ordinary interest income in accordance with such U.S. holder’s regular method of accounting for U.S. federal income tax purposes. Interest earned by a U.S. holder on the Notes generally will be treated as foreign-source income for U.S. federal income tax purposes, which may be relevant in calculating a U.S. holder’s foreign tax credit limitation.

Subject to applicable limitations, some of which vary depending upon a U.S. holder’s particular circumstances, Spanish income taxes withheld at a rate not in excess of any applicable treaty rate from interest payments on a Note may be creditable against the U.S. holder’s U.S. federal income tax liability. However, a U.S. holder that is eligible for a refund under Spanish law or an applicable treaty of any amount withheld for Spanish taxes will not be eligible to receive a credit of such amount against the U.S. holder’s U.S. federal income tax liability. The rules governing foreign tax credits are complex, and U.S. holders should consult their tax advisors regarding the availability of foreign tax credits in their particular circumstances.

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Sale, Exchange, Redemption and Other Taxable Disposition of Notes

Upon the sale, exchange, redemption or other taxable disposition of the Notes, a U.S. holder will recognize gain or loss equal to the difference, if any, between the amount realized on the sale, exchange, redemption or other taxable disposition (other than amounts attributable to accrued but unpaid interest not previously included in income, which will be taxable as described above under “—Interest Payments”) and the U.S. holder’s tax basis in such Notes. A U.S. holder’s tax basis in the Notes generally will equal the initial cost of such Notes to the U.S. holder. Any such gain or loss generally will be capital gain or loss and will be long-term capital gain or loss if the U.S. holder’s holding period for the Note exceeds one year at the time of disposition of such Note. The deductibility of capital losses is subject to certain limitations. Any gain or loss realized by a U.S. holder on the sale, exchange, redemption or other taxable disposition of the Notes generally will be treated as U.S. source gain or loss, as the case may be.

Information Reporting and Backup Withholding

Information returns may be filed with the Internal Revenue Service (the “IRS”) in connection with payments of interest on the Notes and the proceeds from a sale or other disposition of the Notes unless the beneficial owner of such Notes establishes an exemption from the information reporting rules. A U.S. holder of Notes that does not establish such an exemption may be subject to U.S. backup withholding on these payments if it fails to provide its taxpayer identification number or otherwise comply with the backup withholding rules. Backup withholding is not an additional tax. The amount of any backup withholding from a payment to a U.S. holder will be allowed as a credit against the U.S. holder’s U.S. federal income tax liability and may entitle the U.S. holder to a refund, provided that the required information is furnished to the IRS in a timely manner.

Certain U.S. holders who are individuals (and certain specified entities) may be required to report information relating to securities issued by a non-U.S. person or non-U.S. accounts through which such securities are held. U.S. holders should consult their tax advisors regarding their reporting obligations with respect to the Notes.

U.S. Foreign Account Tax Compliance Withholding.

Under certain provisions of the Code, and the FATCA regulations, a 30% withholding tax may apply to certain “foreign passthru payments” made by a foreign financial institution (an “FFI”), including an FFI in the chain of ownership between an ultimate beneficial owner and the issuer of an obligation that has entered into an agreement with the IRS pursuant to which it agrees to certain due diligence, reporting and withholding functions (such an FFI referred to as a “PFFI”). FATCA withholding may apply to payments made by a PFFI to (a) an FFI that is not a PFFI and is not otherwise exempt from FATCA and to (b) certain other payees who fail to provide sufficient identifying information (including, in certain cases, regarding their U.S. owners). Certain aspects of the application of these rules are modified by intergovernmental agreements between the United States and certain other countries (“Intergovernmental Agreements”), including Spain. The term “foreign passthru payment” is not defined currently and withholding on foreign passthru payments will not apply prior to the date that is two years after the publication of the final regulations defining “foreign passthru payments.” In addition, no withholding on foreign passthru payments will apply to any payment on non-U.S. debt obligations (such as the Notes) that are issued before (and not materially modified after) the date that is six months after the date on which the final regulations defining the term “foreign passthru payments” are published. It is uncertain how foreign passthru payment withholding will apply under Intergovernmental Agreements, if at all. Given the uncertainty of the FATCA provisions, although the Issuer does not expect FATCA withholding to apply to payments it makes on the Notes, FATCA may impact payments by custodians or intermediaries in the payment chain between the Issuer and the ultimate beneficial owner of the Notes. The Issuer and the Guarantor have no responsibility for any FATCA withholding applied by any such custodians or intermediaries in the ownership chain and would not be required to pay any additional amounts were any amount deducted or withheld from any payment pursuant to FATCA. Investors should consult their own tax advisors with respect to FATCA and its

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application to the Notes and should consider carefully the FATCA compliance status of any financial intermediaries in the chain of ownership through which they hold Notes.

The U.S. federal income tax discussion provided above is included for general information only and does not describe all consequences that may apply in your particular situation. You should consult your own tax advisor regarding the tax consequences to you of owning and disposing of the Notes, including the tax consequences under state, local, non-U.S. and other tax laws.

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UNDERWRITING

We intend to offer the Notes through the underwriters named below. Subject to the terms and conditions contained in the underwriting agreement dated as of February 26, 2019, between us, the Guarantor and the underwriters, each underwriter has severally agreed to purchase, and we have agreed to sell to that underwriter, the principal amount of the Notes listed opposite the underwriter’s name below:

The underwriters have agreed to purchase all of the Notes sold pursuant to the underwriting agreement if any of these Notes are purchased. If an underwriter defaults, the underwriting agreement provides that the underwriting commitments of the non-defaulting underwriters may be increased, the offering size may be reduced or the underwriting agreement may be terminated.

We and the Guarantor have agreed to indemnify the several underwriters against certain liabilities, including liabilities under the U.S. Securities Act of 1933, as amended (the “Securities Act”), or to contribute to payments the underwriters may be required to make in respect of those liabilities. The underwriters are offering the Notes, subject to prior sale, when, as and if issued to and accepted by them, subject to approval of legal matters by their counsel, including the validity of the Notes, and other conditions contained in the underwriting agreement, such as the receipt by the underwriters of officer’s certificates and legal opinions. The underwriters reserve the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

Each underwriter has agreed that it will not, in connection with the initial distribution of the Notes, sell Notes to any person in an aggregate amount of less than $150,000.

Commissions and Discounts

The underwriters have advised us that they propose initially to offer the Notes to the public at the public offering price on the cover page of this Prospectus Supplement, and may offer the Notes to other dealers at that price less a concession not in excess of 0.495% of the aggregate principal amount of the Notes. The underwriters may allow, and the dealers may reallow, to other dealers a discount not in excess of 0.250% of the aggregate principal amount of the Notes. After the initial public offering, the public offering price, concession and discount may be changed.

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The following table shows the public offering price, underwriting discount and proceeds before expenses to us:

In connection with this offering, we will pay 0.825% per Note, of underwriting discounts to the underwriters (expressed as a percentage of the aggregate principal amount of the Notes). We estimate that our out-of-pocket expenses for this offering will be approximately $1 million. The underwriters have agreed to reimburse us for $1 million of expenses in connection with this offering.

New Issuances of Notes

The Notes are a new issuance of securities with no established trading market. We intend to apply for listing of the Notes on the New York Stock Exchange. We have been advised by the underwriters that they presently intend to make a market in the Notes after completion of the offering. However, they are under no obligation to do so and may discontinue any market-making activities at any time without any notice. We cannot assure the liquidity of the trading market for the Notes or that an active public market for the Notes will develop. If an active public trading market for the Notes does not develop, the market price and liquidity of the Notes may be adversely affected.

Price Stabilization and Short Positions

In connection with the offering, the underwriters are permitted to engage in transactions that stabilize the market price of the Notes. Such transactions consist of bids or purchases to peg, fix or maintain the price of the Notes. If the underwriters create a short position in the Notes in connection with the offering, i.e., if they sell more Notes than are on the cover page of this Prospectus Supplement, such underwriters may reduce that short position by purchasing Notes in the open market. Purchases of a security to stabilize the price or to reduce a short position could cause the price of the security to be higher than it might be in the absence of such purchases.

Neither we nor the underwriters make any representation or prediction as to the direction or magnitude of any effect that the transactions described above may have on the price of the Notes. In addition, neither we nor the underwriters make any representation that the underwriters will engage in these transactions or that these transactions, once commenced, will not be discontinued without notice.

The underwriters also may impose a penalty bid. This occurs when a particular underwriter repays to the other underwriters a portion of the underwriting discount received by it because the other underwriters have repurchased notes sold by or for the account of such underwriter in stabilizing or short covering transactions

Settlement

It is expected that delivery of the Notes will be made against payment therefor on or about the date specified in the last paragraph of the cover page of this Prospectus Supplement, which will be the third Business Day following the date of pricing of the Notes (T+3).

Pursuant to Rule 15c6-1 under the Exchange Act, trades in the secondary market are generally required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes on the date of this Prospectus Supplement will be required to specify alternative settlement arrangements to prevent a failed settlement. Such purchasers should consult their own advisors.

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Other Relationships

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, investment research, principal investment, hedging, financing and brokerage activities. The underwriters and their respective affiliates have engaged in, and may in the future engage in, commercial and investment banking services, hedging services and other commercial dealings in the ordinary course of business with us. They have received customary fees and commissions for these transactions and may do so in the future.

In the ordinary course of their various business activities, the underwriters and their respective affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers, and such investment and securities activities may involve securities and/or instruments of ours. If any of the underwriters or their affiliates have a lending relationship with us, certain of those underwriters or their affiliates routinely hedge, and certain other of those underwriters or their affiliates may hedge, their credit exposure to us consistent with their customary risk management policies. Typically, these underwriters and their affiliates would hedge such exposure by entering into transactions which consist of either the purchase of credit default swaps or the creation of short positions in our securities, including potentially the Notes offered hereby. Any such credit default swaps or short positions could adversely affect future trading prices of the Notes offered hereby. The underwriters and their respective affiliates may also make investment recommendations and/or publish or express independent research views in respect of such securities or instruments and may at any time hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments.

General

Other than in the United States, no action has been or will be taken by the Issuer or the Guarantor in any jurisdiction that would permit a public offering of the Notes or the Guarantee or possession or distribution of this Prospectus Supplement, the accompanying Prospectus or any other offering material relating to the Notes or the Guarantee in any country or jurisdiction where action for that purpose is required. Each underwriter has agreed that it will comply with all applicable laws and regulations in each jurisdiction in which it acquires, offers, sells or delivers Notes or has in its possession or distributes this Prospectus Supplement, the accompanying Prospectus or any other offering document or any publicity or other material relating to the Notes.

Selling Restrictions

European Economic Area (“EEA”)

Please note that, in relation to EEA Member States, additional selling restrictions may apply in respect of any specific EEA Member State, including those set out in relation to the Kingdom of Spain and the United Kingdom in this section.

The Notes are not intended to be offered, sold or otherwise made available to and should not be offered, sold or otherwise made available to any retail investor in the EEA. For these purposes, a retail investor means a person who is one (or more) of: (i) a retail client as defined in point (11) of Article 4(1) of Directive 2014/65/EU (as amended, “MiFID II”); (ii) a customer within the meaning of Directive 2002/92/EC, as amended, where that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II; or (iii) not a qualified investor as defined in Directive 2003/71/EC (as amended, the “Prospectus Directive”). Consequently, no key information document required by Regulation (EU) No. 1286/2014 (as amended, the “PRIIPs Regulation”) for offering or selling the Notes or otherwise making them available to retail investors in the EEA has been prepared and, therefore, offering or selling the Notes or otherwise making them available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation. This Prospectus Supplement and the accompanying Prospectus have been prepared on the basis that any offer of Notes in any Member State of the

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EEA will be made pursuant to an exemption under the Prospectus Directive from the requirement to publish a prospectus for offers of notes. This Prospectus Supplement and the accompanying Prospectus are not a prospectus for the purposes of the Prospectus Directive.

Kingdom of Spain

The Notes, the Prospectus Supplement and the accompanying Prospectus have not been approved or registered in the administrative registries of the CNMV. Accordingly, the Notes may not be offered or sold in Spain except in accordance with the requirements of (i) the Spanish Securities Law (Real Decreto Legislativo 4/2015, de 23 de Octubre, por el que se aprueba el texto refundido de la Ley del Mercado de Valores); (ii) the Royal Decree 1310/2005, of November 4; and (iii) any decrees and regulations made thereunder (and, if applicable, the relevant laws and regulations which in the future may replace the aforementioned existing legal provisions).

Each underwriter has represented and agreed that it will not initially offer or sell any Notes in Spain, but the underwriters have made no representation as to subsequent resales of the Notes.

United Kingdom

Each underwriter has represented and agreed that:

(i) it has only communicated or caused to be communicated and will only communicate or cause to be communicated an invitation or inducement to engage in investment activity (within the meaning of Section 21 of the United Kingdom Financial Services and Markets Act 2000 (“FSMA”)) received by it in connection with the issue or sale of the Notes or the Guarantee in circumstances in which Section 21(1) of the FSMA does not apply to the Issuer or the Guarantor; and

(ii) it has complied and will comply with all applicable provisions of the FSMA with respect to anything done by it in relation to the Notes or the Guarantee in, from or otherwise involving the United Kingdom.

Solely for the purposes of each manufacturer’s product approval process, the target market assessment in respect of the Notes has led to the conclusion that: (i) the target market for the Notes is eligible counterparties and professional clients only, each as defined in MiFID II; and (ii) all channels for distribution of the Notes to eligible counterparties and professional clients are appropriate. Any person subsequently offering, selling or recommending the Notes (a “distributor”) should take into consideration the manufacturers’ target market assessment; however, a distributor subject to MiFID II is responsible for undertaking its own target market assessment in respect of the Notes (by either adopting or refining the manufacturers’ target market assessment) and determining appropriate distribution channels.

The information in this Prospectus Supplement, the accompanying Prospectus or any other document relating to the offer has not been delivered for approval to the Financial Conduct Authority in the United Kingdom and no prospectus (within the meaning of section 85 of the FSMA) has been published or is intended to be published in respect of the Notes. This Prospectus Supplement and the accompanying Prospectus are issued on a confidential basis to “qualified investors” (within the meaning of section 86(7) of the FSMA) in the United Kingdom, and these securities may not be offered or sold in the United Kingdom by means of this Prospectus Supplement, the accompanying Prospectus, any accompanying letter or any other document, except in circumstances which do not require the publication of a prospectus pursuant to section 86(1) of the FSMA. This Prospectus Supplement and the accompanying Prospectus should not be distributed, published or reproduced, in whole or in part, nor may its contents be disclosed by recipients to any other person in the United Kingdom.

In addition, in the United Kingdom, this Prospectus Supplement and the accompanying Prospectus are being distributed only to, and are directed only at, and any offer subsequently made may only be directed at persons who are “qualified investors” (as defined in the Prospectus Directive) (i) who have professional experience in

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matters relating to investments falling within Article 19 (5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Order”) and/or (ii) who are high net worth companies (or persons to whom it may otherwise be lawfully communicated) falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as “relevant persons”). This Prospectus Supplement and the accompanying Prospectus must not be acted on or relied on in the United Kingdom by persons who are not relevant persons. In the United Kingdom, any investment or investment activity to which this Prospectus Supplement and the accompanying Prospectus relates is only available to, and will be engaged in with, relevant persons.

Hong Kong

This Prospectus Supplement and the accompanying Prospectus have not been, and will not be, registered as a prospectus under the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Chapter 32 of the Laws of Hong Kong), nor has it been authorized by the Securities and Futures Commission in Hong Kong pursuant to the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong). No action has been taken in Hong Kong to authorize or register this Prospectus Supplement and the accompanying Prospectus or to permit the distribution of the Prospectus Supplement, the accompanying Prospectus or any documents issued in connection with it. The Notes may not be offered or sold by means of any document other than (i) in circumstances which do not constitute an offer to the public within the meaning of the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Chapter 32 of the Laws of Hong Kong) or the Companies Ordinance (Chapter 622 of the Laws of Hong Kong), or (ii) to “professional investors” within the meaning of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong) and any rules made thereunder, or (iii) in other circumstances which do not result in the document being a “prospectus” within the meaning of the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Chapter 32 of the Laws of Hong Kong). No advertisement, invitation or document relating to the Notes may be issued or may be in the possession of any person for the purpose of issue (in each case whether in Hong Kong or elsewhere), which is directed at, or the contents of which are likely to be accessed or read by, the public in Hong Kong (except if permitted to do so under the laws of Hong Kong) other than with respect to Notes which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” within the meaning of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong) and any rules made thereunder. No person allotted the Notes may sell, or offer to sell, such securities in circumstances that amount to an offer to the public in Hong Kong within six months following the date of issue of such Notes.

Singapore

This Prospectus Supplement and the accompanying Prospectus have not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, the Notes were not offered or sold or caused to be made the subject of an invitation for subscription or purchase and will not be offered or sold or caused to be made the subject of an invitation for subscription or purchase, and this Supplement, the accompanying Prospectus or any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the Notes, has not been circulated or distributed, nor will it be circulated or distributed, whether directly or indirectly, to any person in Singapore other than (i) to an institutional investor (as defined in Section 4A of the Securities and Futures Act (Chapter 289) of Singapore, as modified or amended from time to time (the “SFA”)) pursuant to Section 274 of the SFA, (ii) to a relevant person (as defined in Section 275(2) of the SFA) pursuant to Section 275(1) of the SFA, or any person pursuant to Section 275(1A) of the SFA, and in accordance with the conditions specified in Section 275 of the SFA, or (iii) otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA.

Where the Notes are subscribed or purchased under Section 275 of the SFA by a relevant person which is:

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securities or securities-based derivatives contracts (each term as defined in Section 2(1) of the SFA) of that corporation or the beneficiaries’ rights and interest (howsoever described) in that trust shall not be transferred within six months after that corporation or that trust has acquired the Notes pursuant to an offer made under Section 275 of the SFA except:

Solely for the purposes of its obligations pursuant to sections 309B(1)(a) and 309B(1)(c) of the SFA, the Issuer has determined, and hereby notifies all relevant persons (as defined in Section 309A of the SFA) that the Notes are “prescribed capital markets products” (as defined in the Securities and Futures (Capital Markets Products) Regulations 2018) and Excluded Investment Products (as defined in MAS Notice SFA 04-N12: Notice on the Sale of Investment Products and MAS Notice FAA-N16: Notice on Recommendations on Investment Products).

Japan

The Notes have not been and will not be registered under Article 4, paragraph 1 of the Financial Instruments and Exchange Act of Japan (the “Financial Instruments and Exchange Act”) pursuant to an exemption from the registration requirements applicable to a private placement to Qualified Institutional Investors (as defined in Article 2, paragraph 3 of the Financial Instruments and Exchange Act and the regulation promulgated thereunder). Each underwriter has agreed that it will not offer or sell any Notes, directly or indirectly, in Japan or to, or for the benefit of, any resident of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan), or to others for re-offering or resale, directly or indirectly, in Japan or to a resident of Japan, other than Qualified Institutional Investors, and otherwise in compliance with, the Financial Instruments and Exchange Act and any other applicable laws, regulations and ministerial guidelines of Japan.

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VALIDITY OF THE NOTES

The validity of the Notes and the Guarantee will be passed upon for us by Davis Polk & Wardwell LLP as to matters of New York law, and by Uría Menéndez Abogados, S.L.P. and Telefónica’s general counsel as to matters of Spanish law. Certain matters will be passed upon for the underwriters by DLA Piper LLP (US).

EXPERTS

The consolidated financial statements of Telefónica as of December 31, 2018 and 2017 and for each of the years ended December 31, 2018 and 2017 and management’s assessment of the effectiveness of Telefónica’s internal control over financial reporting (which is included in Management’s Annual Report on Internal Control over Financial Reporting) as of December 31, 2018, incorporated into this Prospectus Supplement by reference to the Form 20-F, have been so incorporated in reliance on the report of PricewaterhouseCoopers Auditores, S.L., an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting. In addition, the adjustments to the 2016 consolidated financial statements to (i) retrospectively reflect the change in presentation of the segment information, as described in Note 4 to the Consolidated Financial Statements included in the Form 20-F, and (ii) retrospectively apply the change in accounting for translation differences and hyperinflation adjustments related to Telefónica’s Venezuelan operations, as described in Note 2 to the Consolidated Financial Statements included in the Form 20-F, have been audited by PricewaterhouseCoopers Auditores, S.L., as set forth in their report, included therein, and incorporated herein by reference.

The consolidated financial statements of Telefónica for the year ended December 31, 2016, before the adjustments to (i) retrospectively reflect the changes in presentation of segment information, as described in Note 4 to the Consolidated Financial Statements and (ii) retrospectively apply the change in accounting for translation differences and hyperinflation adjustments related to Telefónica’s Venezuelan operations, as described in Note 2 to the Consolidated Financial Statements (the “Unadjusted 2016 Consolidated Financial Statements”), appearing in the Form 20-F, have been audited by Ernst & Young, S.L., independent registered public accounting firm, as set forth in their report thereon, included therein, and incorporated herein by reference. The Unadjusted 2016 Consolidated Financial Statements are incorporated herein by reference in reliance upon such report given on the authority of such firm as experts in accounting and auditing.

INCORPORATION BY REFERENCE

The SEC allows us to “incorporate by reference” the information that Telefónica, the Guarantor, files with the SEC, which means that we can and do disclose important information to you by referring you to those documents that are considered part of this Prospectus Supplement. We incorporate by reference into this Prospectus Supplement the Form 20-F filed with the SEC by the Guarantor on February 21, 2019 (SEC Accession No. 0000814052 - 19 - 000029).

We incorporate by reference in this Prospectus Supplement and the accompanying Prospectus all subsequent annual reports of Telefónica filed with the SEC on Form 20-F under the Exchange Act and those of Telefónica’s periodic reports submitted to the SEC on Form 6-K that are specifically identified in such form as being incorporated by reference in this Prospectus Supplement and the accompanying Prospectus after the date hereof and prior to the completion of an offering of securities under this Prospectus Supplement and the accompanying Prospectus. This Prospectus Supplement is part of a registration statement filed with the SEC.

As you read the above documents, you may find inconsistencies in information from one document to another. If you find inconsistencies you should rely on the statements made in the most recent document. All information appearing in this Prospectus Supplement and the accompanying Prospectus is qualified in its entirety by the information and financial statements, including the notes thereto, contained in the documents that we have incorporated by reference.

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We have not authorized anyone to provide any information other than that contained or incorporated by reference in this Prospectus Supplement, the accompanying Prospectus or in any free writing prospectus prepared by or on behalf of us or to which we have referred you. We take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. These documents do not constitute an offer to sell or solicitation of an offer to buy the securities referred to herein in any circumstances under which such offer or solicitation is unlawful. You should not assume that the information in this or any future prospectus supplements is accurate as of any date other than the date on the front of those documents.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This Prospectus Supplement, the accompanying Prospectus and the documents incorporated by reference contain statements that constitute forward-looking statements within the meaning of Section 27A of the Securities Act, Section 21E of the Exchange Act, and the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The forward-looking statements in this Prospectus Supplement, the accompanying Prospectus and the documents incorporated by reference herein can be identified, in some instances, by the use of words such as “will”, “shall”, “target”, “expect”, “aim”, “hope”, “anticipate”, “should”, “may”, “might”, “assume”, “estimate”, “plan”, “intend”, “believe” and similar language or other formulations of a similar meaning or, in each case, the negative formulations thereof. Other forward-looking statements can be identified in the context in which the statements are made or by the forward-looking nature of discussions of strategy, plans or intentions. These statements appear in a number of places in this Prospectus Supplement, the accompanying Prospectus and in the documents incorporated by reference herein, including, without limitation, certain statements made in “Risk Factors” in this Prospectus Supplement and “Risk Factors”, “Information on the Company”, “Operating and Financial Review and Prospects” and “Quantitative and Qualitative Disclosures About Market Risk” in the Form 20-F and include statements regarding our intent, belief or current expectations with respect to, among other things:

Such forward-looking statements are not guarantees of future performance and involve numerous risks and uncertainties, and actual results may differ materially from those anticipated in the forward-looking statements as a result of various factors. The risks and uncertainties involved in our and the Guarantor’s businesses that could affect the matters referred to in such forward-looking statements include but are not limited to:

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Some of these and other important factors that could cause such differences are discussed in more detail in “Risk Factors” in this Prospectus Supplement and “Operating and Financial Review and Prospects”, “Risk Factors” and “Business” in the Form 20-F.

Readers are cautioned not to place undue reliance on those forward-looking statements, which speak only as of the date of this Prospectus Supplement, the date of the accompanying Prospectus or as of the date of the documents incorporated by reference herein, as the case may be. Neither we nor the Guarantor undertake any obligation to update any forward-looking statements that may be made to reflect events or circumstances after the date of this Prospectus Supplement, the accompanying Prospectus or the documents incorporated by reference, as the case may be, including, without limitation, changes in our business or acquisition strategy or planned capital expenditures, or to reflect the occurrence of unanticipated events.

CURRENCY OF PRESENTATION

In this Prospectus Supplement, we present the Guarantor’s financial information in euros. In this Prospectus Supplement, references to “euros”, “EUR” or “€” are to the single currency of the participating member states in the Third Stage of the European Economic and Monetary Union pursuant to the treaty establishing the European Community, as amended from time-to-time. References to “U.S. Dollars”, “USD” or “$” are to the lawful currency adopted by the United States of America, unless the context otherwise requires. References to “GBP” or “£” are to the lawful currency adopted by the United Kingdom.

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ANNEX A

DIRECT REFUND FROM SPANISH TAX AUTHORITIES PROCEDURES

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ANNEX B

Set out below is Annex B. Sections in English have been translated from the original Spanish and such translations constitute direct and accurate translations of the Spanish language text. In the event of any discrepancy between the Spanish language version of the certificate contained in Annex B and the corresponding English translation, the Spanish tax authorities will give effect to the Spanish language version of the relevant certificate only.

The language of this Prospectus Supplement is English. The Spanish language text of Annex B has been included in order that the correct technical meaning may be ascribed to such text under applicable Spanish law. Any foreign language text included in this Prospectus Supplement does not form part of this Prospectus Supplement.

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ANNEX B

Anexo al Reglamento General de las actuaciones y los procedimientos de gestión e inspección tributaria y de desarrollo de las normas comunes de los procedimientos de aplicación de los tributos, aprobado por Real Decreto 1065/2007

Modelo de declaración a que se refieren los apartados 3, 4 y 5 del artículo 44 del Reglamento General de las actuaciones y los procedimientos de gestión e inspección tributaria y de desarrollo de las normas comunes de los procedimientos de aplicación de los tributos

Annex to Royal Decree 1065/2007, of 27 July, approving the General Regulations of the tax inspection and management procedures and developing the common rules of the procedures to apply taxes

Declaration form referred to in paragraphs 3, 4 and 5 of Article 44 of the General Regulations of the tax inspection and management procedures and developing the common rules of the procedures to apply taxes

Don (nombre), con número de identificación fiscal (…)⁽¹⁾, en nombre y representación de (entidad declarante), con número de identificación fiscal (….)⁽¹⁾ y domicilio en (…) en calidad de (marcar la letra que proceda):

Mr. (name), with tax identification number (…)⁽¹⁾, in the name and on behalf of (entity), with tax identification number (….)⁽¹⁾ and address in (…) as (function—mark as applicable):

Formula la siguiente declaración, de acuerdo con lo que consta en sus propios registros:

Makes the following statement, according to its own records:

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Lo que declaro en ……………………a …. de ……………de ….

I declare the above in …………… … on the…. of…………… … of….

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PROSPECTUS

Ordinary Shares of Telefónica, S.A.

Rights to subscribe for Ordinary Shares of Telefónica, S.A.

Debt Securities of Telefónica Emisiones, S.A.U.,

which are fully and unconditionally guaranteed by Telefónica, S.A.

Telefónica, S.A. may offer from time to time ordinary shares, including in the form of American Depositary Shares (“ADSs”), or rights to subscribe for ordinary shares of Telefónica, S.A., in one or more offerings.

Telefónica Emisiones, S.A.U. may offer from time to time in one or more series Debt Securities (as defined herein), which are fully and unconditionally guaranteed by Telefónica, S.A.

This prospectus describes the general terms of these securities and the general manner in which Telefónica, S.A. and Telefónica Emisiones, S.A.U. may offer these securities. Telefónica, S.A. and/or Telefónica Emisiones, S.A.U. will provide the specific terms of the securities, and the specific manner in which they are offered, in one or more supplements to this prospectus. Such prospectus supplements may also add, update or change information contained in this prospectus. You should read both this prospectus and any prospectus supplement, together with the additional information described under the heading “Where You Can Find More Information” and the information incorporated by reference in this prospectus that is described under the heading “Incorporation by Reference” before investing in our securities. The amount and price of the offered securities will be determined at the time of the offering.

The ordinary shares of Telefónica, S.A. are currently listed on each of the Madrid, Barcelona, Bilbao and Valencia stock exchanges (the “Spanish Stock Exchanges”) and are quoted through the Automated Quotation System of the Spanish Stock Exchanges under the symbol “TEF”. The ordinary shares of Telefónica, S.A. are also listed on the London and Buenos Aires stock exchanges. The ordinary shares of Telefónica, S.A. in the form of ADSs are listed on the New York Stock Exchange and the Lima (Peru) Stock Exchange. If Telefónica, S.A. and/or Telefónica Emisiones, S.A.U. decide to list any of the other securities that may be offered hereunder on a national stock exchange upon issuance, the applicable prospectus supplement to this prospectus will identify the exchange and the expected date for commencement of trading.

Investing in these securities involves risks. See “Risk Factors”.

Neither the United States Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

Telefónica, S.A. and Telefónica Emisiones, S.A.U. may sell these securities on a continuous or delayed basis directly, through agents or underwriters as designated from time to time, or through a combination of these methods, and reserve the sole right to accept, and together with any agents, dealers and underwriters, reserve the right to reject, in whole or in part, any proposed purchase of securities. If any agents, dealers or underwriters are involved in the sale of any securities, the applicable prospectus supplement will set forth any applicable commissions or discounts. The net proceeds from the sale of securities will also be set forth in the applicable prospectus supplement.

The date of this prospectus is April 20, 2018.

TABLE OF CONTENTS

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that Telefónica, S.A. and Telefónica Emisiones, S.A.U. filed with the United States Securities and Exchange Commission (the “SEC”) using the “shelf” registration process. Under the shelf registration process, Telefónica, S.A. and/or Telefónica Emisiones, S.A.U. may sell any combination of the securities described in this prospectus from time-to-time in the future in one or more offerings.

This prospectus provides you with a general description of the securities that can be offered. Each time the securities described herein are offered under this prospectus, Telefónica, S.A. and/or Telefónica Emisiones, S.A.U., as the case may be, will provide prospective investors with a prospectus supplement that will contain specific information about the terms of the securities. A prospectus supplement may also add to or update or change information contained in this prospectus. Accordingly, to the extent inconsistent, information in this prospectus is superseded by the information in any prospectus supplement. You should read both this prospectus and any prospectus supplement together with the additional information described in “Where You Can Find More Information” and the information incorporated by reference that is described in “Incorporation by Reference”.

A prospectus supplement to be attached to the front of this prospectus will describe, among other matters, the terms of the offering, including the amount and detailed terms of the securities, the public offering price, net proceeds to us, the expenses of the offering, the terms of offers and sales outside of the United States, if any, our capitalization, the nature of the plan of distribution, the other specific terms related to such offering, and any U.S. federal income tax consequences and Spanish tax considerations applicable to the securities being offered.

In this prospectus and any prospectus supplements, “Telefónica Emisiones” refers to Telefónica Emisiones, S.A.U. and “Telefónica”, “Telefónica, S.A.”, the “Group”, the “Telefónica Group” and the “Guarantor” refer to Telefónica, S.A. and, where applicable, its consolidated subsidiaries, unless the context otherwise requires. We use the words “we”, “us” and “our” to refer to Telefónica Emisiones and/or Telefónica, as the context requires. We use the word “you” to refer to prospective investors in the securities. We use the term “Debt Securities” to refer collectively to any debt securities to be issued by Telefónica Emisiones and guaranteed by the Guarantor pursuant to this prospectus.

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INCORPORATION BY REFERENCE

The SEC allows us to “incorporate by reference” the information Telefónica files with, or furnishes to, the SEC, which means that we can and do disclose important information to you by referring you to those documents that are considered part of this prospectus. Information that Telefónica files with, or furnishes to, the SEC in the future and that we incorporate by reference will automatically update and supersede the previously filed information. We incorporate by reference the following documents:

We also incorporate by reference in this prospectus all subsequent annual reports of Telefónica filed with the SEC on Form 20-F under the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”), and those of Telefónica’s periodic reports submitted to the SEC on Form 6-K that we specifically identify in such form as being incorporated by reference in this prospectus after the date hereof and prior to the completion of an offering of securities under this prospectus. This prospectus is part of a registration statement filed with the SEC. See “Where You Can Find More Information”.

As you read the above documents, you may find inconsistencies in information from one document to another. If you find inconsistencies you should rely on the statements made in the most recent document. All information appearing in this prospectus is qualified in its entirety by the information and financial statements, including the notes thereto, contained in the documents that we have incorporated by reference.

You should rely only on the information incorporated by reference or provided in this prospectus and in any prospectus supplement. We have not authorized anyone else to provide you with different information. In particular, no dealer, salesperson or other person is authorized to give you any information or to represent anything not contained in this prospectus or that is incorporated by reference herein. This prospectus is an offer to sell or to buy only the securities referred to herein, but only under circumstances and in jurisdictions where it is lawful to do so. You should not assume that the information in this prospectus or any prospectus supplement is accurate as of any date other than the date on the front of those documents.

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WHERE YOU CAN FIND MORE INFORMATION

Telefónica files annual and periodic reports and other information with the SEC. You may read and copy any document that Telefónica files with, or furnishes to, the SEC at the SEC’s public reference room at 100 F Street, N.E., Washington, DC 20549. Please call the SEC at 1 (800) SEC-0330 for further information on the operation of the public reference rooms. Telefónica’s SEC filings and submissions are also available to the public over the Internet at the SEC’s website at http://www.sec.gov.

Telefónica makes available free of charge through Telefónica’s website, accessible at http://www.telefonica.com, certain of Telefónica’s reports and other information filed with or furnished to the SEC.

With the exception of the reports specifically incorporated by reference in this prospectus as set forth above, material contained on or accessible through Telefónica’s website is specifically not incorporated into this prospectus. See “Incorporation by Reference”.

You may also request a copy of Telefónica’s filings at no cost, by writing or calling Telefónica at the following addresses:

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THE TELEFÓNICA GROUP

Telefónica, S.A. is a corporation duly organized and existing under the laws of the Kingdom of Spain, incorporated on April 19, 1924. The Telefónica Group:

Telefónica, S.A.’s principal executive offices are located at Distrito Telefónica, Ronda de la Comunicación, s/n, 28050 Madrid, Spain, and its registered offices are located at Gran Vía, 28, 28013 Madrid, Spain. Its telephone number is +34 900 111 004.

TELEFÓNICA EMISIONES, S.A.U.

Telefónica Emisiones is a wholly-owned subsidiary of Telefónica, S.A. It was incorporated on November 29, 2004 as a company with unlimited duration and with limited liability and a sole shareholder under the laws of the Kingdom of Spain (sociedad anónima unipersonal). The share capital of Telefónica Emisiones is €62,000 divided into 62,000 ordinary shares of par value €1 each, all of them duly authorized, validly issued and fully paid and each of a single class. It is a financing vehicle for the Telefónica Group.

The principal executive offices of Telefónica Emisiones are located at Distrito Telefónica, Ronda de la Comunicación, s/n, 28050 Madrid, Spain, and its registered offices are located at Gran Vía, 28, 28013 Madrid, Spain. Its telephone number is +34 900 111 004.

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RISK FACTORS

You should carefully consider the risk factors contained in the applicable prospectus supplement and in the documents incorporated by reference into this prospectus, including but not limited to, those risk factors in Item 3.D in the Form 20-F, in deciding whether to invest in the securities being offered pursuant to this prospectus. We may include further risk factors in subsequent reports on Form 20-F or Form 6-K incorporated into this prospectus. You should carefully consider all these risk factors in addition to the other information presented or incorporated by reference in this prospectus.

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RATIO OF EARNINGS TO FIXED CHARGES

The following table sets forth Telefónica’s consolidated ratio of earnings to fixed charges using financial information compiled in accordance with IFRS as issued by the IASB for the years ended December 31, 2013, 2014, 2015, 2016 and 2017.

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DESCRIPTION OF TELEFÓNICA’S ORDINARY SHARES

Our shares are governed by our bylaws (estatutos) and by Spanish law, namely, the Spanish Corporation Act (Ley de Sociedades de Capital), approved by Royal Legislative Decree 1/2010 of July 2, as amended (the “Spanish Corporation Act”), Spanish Securities Market Act (Texto refundido de la Ley del Mercado de Valores) approved by Royal Legislative Decree 4/2015 of October 23, as amended (the “Spanish Securities Market Act”), and by ancillary provisions further developing those pieces of legislation. Shareholders’ rights are principally governed by the Spanish Corporation Act and Telefónica’s bylaws (Estatutos Sociales) and regulations on the general shareholders’ meeting (Reglamento de la Junta General de Accionistas).

The following summary describes the material considerations concerning the capital stock of Telefónica and briefly describes the material provisions of Telefónica’s bylaws and relevant Spanish law. This summary does not include all the provisions of our bylaws nor of the Spanish laws mentioned herein and is qualified in its entirety by reference to the detailed provisions thereof.

A copy of Telefónica’s bylaws has been filed with the SEC as an exhibit to the registration statement of which this prospectus is a part.

General

As of April 20, 2018, Telefónica’s paid in share capital was €5,192,131,686, represented by a single class of 5,192,131,686 ordinary shares with a nominal value of €1.00 each. As of December 31, 2017, Telefónica’s paid in share capital was €5,192,131,686, represented by a single class of 5,192,131,686 ordinary shares with a nominal value of €1.00 each.

Our shareholders have delegated to the Board of Directors the authority to increase the share capital up to a maximum nominal amount of €2,469,208,757 new ordinary shares (equal to half of Telefónica’s share capital on June 12, 2015, the date of the authorization). The Board of Directors is authorized to exclude preemptive rights, in whole or in part, pursuant to the applicable provisions of the Spanish Corporation Act. The Board’s authorization to issue new shares expires on June 12, 2020. Telefónica’s Board has already utilized part of this authorization and, as of the date of this prospectus, it is authorized to issue share capital up to €2,469,208,757 pursuant to this authorization.

Attendance and Voting at Shareholders’ Meetings

We hold our ordinary general shareholders’ meeting during the first six months of each fiscal year on a date fixed by the Board of Directors. Extraordinary general shareholders’ meetings may be called, from time to time, at the discretion of our Board of Directors or upon the request of shareholders representing at least 3% of our paid-in share capital. The minimum percentage required to exercise this right was lowered from 5% to 3% by Law 31/2014.

We publish notices of all ordinary and extraordinary general shareholders’ meetings in the Official Gazette of the Commercial Registry or in one of the more widely circulated newspapers in Spain, on the website of the Spanish Securities and Exchange Commission (Comisión Nacional del Mercado de Valores (the “CNMV”)), and on our web site in due time pursuant to the Spanish Corporation Act, being on a general basis at least one month before the relevant meeting. Furthermore, the Board of Directors may publish notices in other media, if deemed appropriate to ensure the public and effective dissemination of the notice meeting.

Each share of Telefónica, S.A. entitles the holder to one vote. However, only registered holders of at least 300 shares are entitled to attend a general shareholders’ meeting. Holders of a lesser number of shares may grant a proxy in respect thereof to a shareholder having the right to attend, as well as group together with other shareholders in the same situation until reaching the required number of shares, following which a proxy must be granted by the shareholders so grouped together to one of such shareholders. The grouping must be carried out specifically for each general shareholders’ meeting and be recorded in writing.

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However, under our bylaws, the maximum number of votes that a shareholder may cast is capped at 10% of our total outstanding voting capital. In determining the maximum number of votes that each shareholder may cast, only the shares held by such shareholder are counted, disregarding those that correspond to other shareholders who have appointed such shareholder as his or her proxy, in spite of applying the limit individually to each of the represented shareholders. This cap will also apply to the maximum number of votes that may be collectively or individually cast by two or more shareholder companies belonging to the same group of entities, as well as to the maximum number of votes that may be cast by an individual or corporate shareholder and the entity or entities that are shareholders themselves and which are directly or indirectly controlled by that individual or corporate shareholder. Moreover, in accordance with the Spanish Corporation Act, such cap would become ineffective where the bidder reaches, as a consequence of a tender offer, a percentage equal to or greater than 70% of the share capital carrying voting rights, unless the bidder (or those acting in concert with the bidder) is not subject to equivalent neutralization measures or has not adopted them.

In addition, according to Article 34 of Spanish Royal Decree-Law 6/2000 of June 23 on urgent measures to improve competition in the goods and services markets, individuals and legal entities directly and indirectly holding more than 3% of the total share capital or voting rights of two or more principal operator companies in Spain in, among other markets, the fixed-line and mobile-line telephony markets, may not exercise their voting rights in excess of 3% of the total in more than one company, except with the prior authorization of the Spanish National Markets and Competition Commission (Comisión Nacional de los Mercados y la Competencia (the “CNMC”)). Principal operators are defined as one of the five operators with the largest market share in the corresponding market (“Principal Operators”). In addition, no individual or legal entity is allowed to appoint, directly or indirectly, members of the management body of more than one Principal Operator in, among others, the fixed-line or mobile-line telephony markets, except with the prior authorization of the CNMC. Additionally, individuals or legal entities considered Principal Operators are not allowed to exercise more than 3% of the voting rights of another Principal Operator nor to appoint, directly or indirectly, members of the management body of any Principal Operator, except, in both cases, with the prior authorization of the CNMC. Telefónica is considered a Principal Operator for the purposes of Article 34 of Royal Decree-Law 6/2000 of June 23 in the Spanish fixed-line and mobile-line telephony markets.

Any share may be voted by proxy. The proxies may be granted in writing or electronically and are valid only for a single meeting, unless the proxy-holder is the granting shareholder’s spouse, ascendant or descendant, or holds a general power of attorney granted in a public instrument with powers to manage all of the assets held by the shareholder granting the proxy in Spain.

Only holders of record five days prior to the day on which a general meeting of shareholders is scheduled to be held may attend and vote at the meeting.

According to the Spanish Corporation Act the general shareholders’ meeting will be quorate on first call if the shareholders present, in person or by proxy, hold at least 25% of the subscribed share capital carrying voting rights. On second call, the meeting will be quorate regardless of the capital in attendance.

However, if the agenda of the meeting includes resolutions on the amendment of the bylaws, including an increase or reduction of share capital, the transformation, merger, split-off, the en bloc assignment of assets and liabilities, the migration of the registered office abroad, the issuance of debentures or the exclusion or limitation of pre-emptive rights, the required quorum on first call must be met by the attendance of shareholders representing at least 50% of the subscribed share capital carrying voting rights (each a “Special Resolution”). On second call, the attendance of 25% of the subscribed share capital carrying voting rights will suffice.

As a general rule, resolutions at the general shareholder’s meeting will be passed by a simple majority of votes cast at such meeting (i.e., provided that the votes “for” outnumber the votes “against” the relevant resolution).

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In contrast, in order to approve any Special Resolution, if the capital present or represented at the general shareholders’ meeting exceeds 50% of the subscribed share capital carrying voting rights, the favorable vote of the absolute majority (that is, if the votes in favor exceed 50% of the votes corresponding to capital present and represented at the shareholders’ meeting) will be required. If, on second call, shareholders representing 25% or more of the subscribed share capital carrying voting rights are present or represented but fail to reach the 50% threshold, the favorable vote of at least two-thirds of the share capital present or represented at the meeting will be required.

Preemptive Rights

Pursuant to the Spanish Corporation Act, shareholders have preemptive rights to subscribe for any new shares in capital increases with issuances of new shares with a charge to monetary contributions and in issuances of debentures convertible into shares. Such rights may be excluded (partially or totally) under special circumstances by virtue of a resolution passed at a general shareholders’ meeting in accordance with Articles 308, 504 and 506 of the Spanish Corporation Act, or by the Board of Directors, if previously authorized at a general shareholders’ meeting in accordance with Article 506 (for capital increases) and Articles 417 and 511 (for issuances of debentures convertible into shares) of the Spanish Corporation Act. Such preemptive rights will not be available in the event of an increase in capital to meet the requirements of a convertible bond issue or a merger of another entity into Telefónica or of all or part of the assets split from another company, in which shares are issued as consideration or, in general, when the increase is carried out as consideration in exchange for non-cash contributions. Such rights are transferable, may be traded on the Automated Quotation System and may be of value to existing shareholders because new shares may be offered for subscription at prices lower than prevailing market prices.

Form and Transfer

Ordinary shares are in book-entry form and are indivisible. Joint holders must nominate one person to exercise their rights as shareholders, though joint holders are jointly and severally liable for all obligations arising from their status as shareholders. Sociedad de Gestión de los Sistemas de Registro, Compensación y Liquidación de Valores, S.A. Unipersonal (“Iberclear”), which manages the clearance and settlement system of the Spanish Stock Exchanges, maintains the central registry of ordinary shares reflecting the number of ordinary shares held by each of its participant entities (entidades participantes) as well as the number of such shares held by registered legal owners. Each participant entity in turn maintains a register of the owners of such shares.

Transfers of Telefónica’s ordinary shares quoted on the Spanish Stock Exchanges must be made by book-entry registry or delivery of evidence of title to the buyer through, or with the participation of, a member of the Spanish Stock Exchanges that is an authorized broker or dealer. Transfers of Telefónica’s ordinary shares may also be subject to certain fees and expenses.

Reporting Requirements

According to Royal Decree 1362/2007 of October 19 on the disclosure of significant stakes in listed companies (“Royal Decree 1362/2007”), modified by Royal Decree 878/2015, of October 2 (“Royal Decree 878/2015”), the acquisition or disposition of shares of Telefónica must be reported within four trading days of the acquisition or disposition to Telefónica and the CNMV, where:

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Royal Decree 878/2015 established a new approach for calculating whether these thresholds are reached, surpassed or fell short, which requires adding the voting rights corresponding to shares and financial instruments. Royal Decree 878/2015 also expanded the definition of financial instruments which should be reported, including financial instruments having a similar economic effect as the shares of a company, whether the instruments are cash or physically settled, including convertible securities, options, forwards, futures, swaps, contracts for differences (CFDs) or any other type of instrument which grants the holder the right to acquire shares or a right to receive an equivalent cash settlement amount. Additionally, Royal Decree 878/2015 amended the calculation rules of the voting rights attributable to a financial instrument which, among other changes, is now calculated on a daily basis.

The reporting requirements referred to above apply not only to the acquisition or transfer of shares, but also when, without an acquisition or transfer of shares, the proportion of voting rights of an individual or legal entity reaches, exceeds or falls below the threshold that triggers the obligation to report as a consequence of a change in the total number of voting rights of Telefónica on the basis of the information reported to the CNMV and disclosed by it, in accordance with the Royal Decree 1362/2007 (as amended).

Regardless of the actual ownership of the shares, any individual or legal entity with a right to acquire, transfer or exercise voting rights granted by the shares, and any individual or legal entity who owns, acquires or transfers, whether directly or indirectly, other securities or financial instruments which grant a right to acquire shares carrying voting rights (such as transferable securities, options, futures, swaps, forwards and other derivative contracts), will also have an obligation to notify the Company and the CNMV of the holding of a significant stake in accordance with the above-mentioned regulations.

Stricter disclosure obligations apply if the person obligated to disclose has residency in a country considered a tax haven by the Spanish authorities, a zero-taxation country or territory or a country or territory that does not share information with the Spanish authorities, in which cases the initial threshold for disclosure is reduced to 1% (and successive multiples of 1%).

Our directors must report to us and the CNMV the percentage and number of voting rights in Telefónica held by them at the time of becoming or ceasing to be a member of the Board of Directors. Furthermore, all members of the Board must report any change in the percentage of voting rights they hold, as a result of any acquisition or disposition of our shares or voting rights, or financial instruments which carry a right to acquire or dispose of shares which have voting rights attached, including any stock-based compensation that they may receive pursuant to any of our compensation plans. Members of our senior management must also report any stock-based compensation that they may receive pursuant to any of our compensation plans or any subsequent amendment to such plans. Royal Decree 1362/2007 (as amended) refers to the definition given by Royal Decree 1333/2005 of November 11, which develops the Spanish Securities Market Act, regarding market abuse, which defines senior management (directivos) as those “high-level employees in positions of responsibility with regular access to insider information (información privilegiada) related, directly or indirectly, to the issuer and that, furthermore, are empowered to adopt management decisions affecting the future development and business perspectives of the issuer”.

In addition, pursuant to Royal Decree 1333/2005 of November 11 (as amended), any member of our Board and our senior management, or any parties closely related to any of them, as such terms are defined therein, must report to the CNMV any transactions carried out with respect to our shares or derivatives or other financial instruments relating to our shares. The notification of the transaction must include particulars of, among others, the type of transaction, the date of the transaction and the market in which the transactions were carried out, the number of shares traded and the price paid.

These disclosure obligations are primarily regulated by Royal Decree 1362/2007 (as amended) and by Regulation (EU) No 596/2014 of the European Parliament and of the Council of April 16, on market abuse (the “Market Abuse Regulation”), which repeals Directive 2003/6/EC of the European Parliament and of the Council

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and Commission Directives 2003/124/EC, 2003/125/EC and 2004/72/EC. Both establish a detailed set of rules on this legal framework (including, inter alia, rules determining the persons subject to disclosure obligations, the different types of situations triggering disclosure and corresponding exceptions, specific attribution and aggregation rules, the deadlines to notify the transactions, triggering disclosure obligations and incorporation of notices submitted to the CNMV’s public registry).

Disclosure of Net Short Positions

In accordance with Regulation (EU) No. 236/2012 of the European Parliament and of the European Council of March 14, 2012 on short selling and certain aspects of credit default swaps (as further supplemented by several delegated regulations regulating technical aspects necessary for its effective enforceability and to ensure compliance with its provisions), net short positions on shares listed on the Spanish Stock Exchanges equal to, or in excess of, 0.2% of the relevant issuer’s share capital and any increases or reductions thereof by 0.1% are required to be disclosed to the CNMV by no later than the first trading day following the transaction. If the net short position reaches 0.5%, and also at every 0.1% above that, the CNMV will disclose the net short position to the public.

Notification is mandatory even if the same position has been already notified to the CNMV in compliance with reporting requirements previously in force in Spain.

The information to be disclosed is set out in Table 1 of Annex I of Delegated Regulation 826/2012, according to the format approved as Annex II of this Regulation. The information will be published, where appropriate, on a web page operated or supervised by the corresponding authority.

Moreover, pursuant to Regulation (EU) No. 236/2012, where the CNMV considers that (i) there are adverse events or developments that constitute a serious threat to financial stability or to market confidence (serious financial, monetary or budgetary problems, which may lead to financial instability, unusual volatility causing significant downward spirals in any financial instrument, etc.); and (ii) the measure is necessary and will not be disproportionately detrimental to the efficiency of financial markets in view of the advantages sought, it may, following consultation with the European Securities and Market Authority (“ESMA”), take any one or more of the following measures:

In addition, according to Regulation (EU) No. 236/2012, where the price of a financial instrument has fallen significantly during a single day in relation to the closing price on the previous trading day (10% or more in the case of a liquid share), the CNMV may prohibit or restrict short selling of financial instruments for a period not exceeding the end of the trading day following the trading day on which the fall in price occurs.

Finally, Regulation (EU) No. 236/2012 also vests powers to ESMA in order to take measures similar to the ones described above in exceptional circumstances, when the purpose of these measures is to deal with a threat affecting several EU member states and the competent authorities of these member states have not taken adequate measures to address it.

Shareholder Agreements

Article 531 et seq. of the Spanish Corporation Act require parties to disclose those shareholders’ agreements in respect of Spanish listed companies that affect the exercise of voting rights at a general shareholders’ meeting

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or contain restrictions or conditions on the transferability of shares or bonds that are convertible or exchangeable into shares. If any shareholders enter into such agreements with respect to Telefónica’s shares, they must disclose the execution, amendment or extension of such agreements to Telefónica and the CNMV (together with the clauses of said agreements) and file such agreements with the appropriate Commercial Registry. Failure to comply with these disclosure obligations renders any such shareholders’ agreement unenforceable and constitutes a violation of the Spanish Securities Market Act.

Acquisition of Own Shares

Pursuant to Spanish corporate law, we may only repurchase our own shares within certain limits and in compliance with the following requirements:

For these purposes, net worth means the amount resulting from the application of the criteria used to draw up the financial statements, subtracting the amount of profits directly imputed to that net worth, and adding the amount of share capital subscribed but not called and the share capital par and issue premiums recorded in our accounts as liabilities. In addition:

Voting rights attached to treasury shares will be suspended and economic rights (e.g., the right to receive dividends and other distributions and liquidation rights), except the right to receive bonus shares, will accrue proportionately to all of our shareholders. Treasury shares are counted for the purpose of establishing the quorum for shareholders’ meetings and majority voting requirements to pass resolutions at shareholders’ meetings.

The Market Abuse Regulation establishes rules in order to ensure the integrity of European Community financial markets and to enhance investor confidence in those markets. This regulation maintains an exemption from the market manipulation rules regarding share buyback programs by companies listed on a stock exchange in an EU Member State. In particular, Article 5 of the Market Abuse Regulation states that in order to benefit from the exemption, a buyback program must comply with certain requirements established under such regulation and the sole purpose of the buyback program must be to reduce the share capital of an issuer (in value or in number of shares) or to meet obligations arising from either of the following:

Commission Delegated Regulation (EU) 2016/1052, of March 8, supplementing Regulation (EU) 596/2014 with regard to regulatory technical standards for the conditions applicable to buyback programs and stabilization measures, set forth certain conditions that transactions relating to buyback programs shall meet in order to benefit from the exemption laid down in Article 5 of Regulation (EU) 596/2014, as well as certain disclosure and reporting obligations that the issuer mush complied with for such purposes.

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In addition, in order to comply with the Market Abuse Regulation, on April 26, 2017, the CNMV issued Circular 1/2017, replacing Circular 3/2007 and setting out the requirements to be met by liquidity contracts entered into by issuers with financial institutions for the management of its treasury shares to constitute an accepted market practice and, therefore, be able to rely on a safe harbor for the purposes of the Market Abuse Regulation.

If an acquisition or series of acquisitions of shares of Telefónica reaches or exceeds or causes Telefónica’s and its affiliates’ holdings to reach or exceed 1% of Telefónica’s voting shares, Telefónica must notify its final holding of treasury stock to the CNMV. If such threshold is reached as a result of a series of acquisitions, such reporting obligation will only arise after the closing of the acquisition which, taken together with all acquisitions made since the last of any such notifications, causes the Telefónica’s and its affiliates holdings to exceed, 1% of Telefónica’s voting shares. Sales and other dispositions of Telefónica’s treasury stock will not be deducted in the calculation of such threshold. This requirement also applies if the stock is acquired by a majority-owned subsidiary of Telefónica.

Moreover, pursuant to Spanish corporate law, the audited financial statements of a company must include a reference regarding any treasury shares.

Change of Control Provisions

Certain antitrust regulations may delay, defer or prevent a change of control of Telefónica or any of its subsidiaries in the event of a merger, acquisition or corporate restructuring. In Spain, the application of both Spanish and European antitrust regulations requires that prior notice of domestic or cross-border merger transactions be given in order to obtain a “non-opposition” ruling from antitrust authorities.

Tender Offers

Tender offers are governed in Spain by the Spanish Securities Markets Act and Royal Decree 1066/2007, of July 27 (as amended), which implemented Directive 2004/25/EC of the European Parliament and of the European Council of April 21. Tender offers in Spain may qualify as either mandatory or voluntary offers.

Mandatory public tender offers must be launched for all the shares of the target company or other securities that might directly or indirectly give the right to subscription thereto or acquisition thereof (including convertible and exchangeable bonds) at an equitable price and not subject to any conditions when any person acquires control of a Spanish company listed on the Spanish Stock Exchanges, whether such control is obtained:

A person is deemed to have obtained the control of a target company, individually or jointly with concerted parties, whenever:

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Notwithstanding the above, Spanish regulations establish certain exceptional situations where control is obtained but no mandatory tender offer is required, including, among others:

For the purposes of calculating the percentages of voting rights acquired, the regulations establish the following rules:

Notwithstanding the foregoing, upon the terms established in the regulations, the CNMV will conditionally dispense with the obligation to launch a mandatory bid when another person or entity, individually or jointly in concert, directly or indirectly holds an equal or greater voting percentage than the potential bidder in the target company.

The price of the mandatory tender offer is deemed equitable when it is at least equal to the highest price paid or agreed by the bidder or by any person acting in concert therewith for the same securities during the 12 months

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prior to the announcement of the tender offer. When the mandatory tender offer must be made without the bidder having previously acquired the shares over the above-mentioned 12-month period, the equitable price shall not be less than the price calculated in accordance with other rules set forth in the regulations. In any case, the CNMV may change the price so calculated in certain circumstances (extraordinary events affecting the price, evidence of market manipulation, etc.).

Mandatory offers must be launched within one month from the acquisition of the control of the target company.

Voluntary tender offers may be launched when a mandatory offer is not required. Voluntary offers are subject to the same rules established for mandatory offers except for the following:

In any case, according to the Spanish Securities Market Act, the price in a voluntary tender offer must be the higher of (i) the equitable price and (ii) the price resulting from an independent valuation report, and must at least consist of cash as an alternative if certain circumstances have occurred during the two years prior to the announcement of the offer (basically, the trading price for the shares being affected by price manipulation practices, market or share prices being affected by natural disasters, force majeure, or other exceptional events, or the target company being subject to expropriation or confiscation resulting in a significant impairment of the company’s real value).

Spanish regulations on tender offers set forth further provisions, including:

Foreign Investment and Exchange Control Regulations

Restrictions on Foreign Investment

Exchange controls and foreign investment were, with certain exceptions, completely liberalized by Royal Decree 664/1999, of April 23, which was approved in conjunction with Law 18/1992 (the “Spanish Foreign Investment Law”) to bring the existing legal framework in line with the provisions of the Treaty of the European Union.

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According to regulations adopted under the Spanish Foreign Investments Law, and subject to the restrictions described below, foreign investors may invest freely in shares of Spanish companies as well as transfer invested capital, capital gains and dividends out of Spain without limitation (subject to applicable taxes and exchange controls). Foreign investors who are not resident in a tax haven are required to notify the Spanish Registry of Foreign Investments (Registro Nacional de Inversiones Extranjeras) maintained by the General Bureau of International Commerce and Investments (Dirección General de Comercio Internacional e Inversiones) (a department of the Ministry of Economy, Industry and Competitiveness (Ministerio de Economía, Industria y Competitividad)) following an investment or divestiture, and such notification is for the purpose of promoting foreign investments and for statistical, economic and administrative purposes. Where the investment or divestiture is made in shares of a Spanish company listed on any of the Spanish Stock Exchanges, the duty to provide notice of a foreign investment or divestiture lies with the relevant entity with which the shares (in book-entry form) have been deposited or that has acted as an intermediary in connection with the investment or divestiture.

If the foreign investor is a resident of a tax haven, as defined under Spanish law (Royal Decree 1080/1991 of July 5), notice must be provided to the Registry of Foreign Investments prior to making the investment, as well as after the transaction has been completed. However, prior notification is not necessary in the following cases:

Additional regulations to those described above apply to investments in some specific industries, including air transportation, gambling, mining, manufacturing and sales of weapons and explosives for civil use and national defense, radio, television and telecommunications. These restrictions do not apply to investments made by EU residents, other than investments by EU residents in activities relating to the Spanish defense sector or the manufacturing and sale of weapons and explosives for non-military use.

The Spanish Council of Ministers (Consejo de Ministros), acting on the recommendation of the Ministry of Economy, Industry and Competitiveness, may suspend the aforementioned provisions relating to foreign investments for reasons of public policy, health or safety, either generally or in respect of investments in specified industries, in which case any proposed foreign investments falling within the scope of such a suspension would be subject to prior authorization from the Spanish government, acting on the recommendation of the Ministry of Economy, Industry and Competitiveness.

Law 19/2003 of July 4 (as amended), which has as its purpose the establishment of a regulatory regime relating to capital flows to and from legal or natural persons abroad and the prevention of money laundering, generally provides for the liberalization of the regulatory environment with respect to acts, businesses, transactions and other operations between residents and non-residents of Spain in respect of which charges or payments abroad will occur, as well as money transfers, variations in accounts or financial debit or credits abroad. These operations must be reported to the Ministry of Economy, Industry and Competitiveness and the Bank of Spain only for informational and statistical purposes. The most important developments resulting from Law 19/2003 are the obligations on financial intermediaries to provide to the Spanish Ministry of Economy, Industry and Competitiveness and the Bank of Spain information corresponding to client transactions.

In addition to the notices relating to significant shareholdings that must be sent to Telefónica, the CNMV and the relevant Spanish Stock Exchanges, as described in this section under “—Reporting Requirements”, foreign investors are required to provide such notices to the Registry of Foreign Investments.

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Exchange Control Regulations

Pursuant to Royal Decree 1816/1991 of December 20, as amended by Royal Decree 1360/2011 of October 7, relating to economic transactions with non-residents, and EC Directive 88/361/EEC, receipts, payments or transfers between non-residents and residents of Spain must be made through registered entities (entidades registradas), such as banks and other financial institutions properly registered with the Bank of Spain and/or the CNMV, through bank accounts opened with foreign banks or foreign branches of registered entities or in cash or by a check payable to bearer.

Payment of Taxes

Holders of ordinary shares will be responsible for any taxes or other governmental charges payable on their ordinary shares, including any taxes payable on transfer. The paying agent or the transfer agent, as the case may be, may, and upon instruction from Telefónica, will:

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DESCRIPTION OF AMERICAN DEPOSITARY SHARES

Telefónica may offer from time to time ordinary shares in the form of ADSs. Our ADSs are listed on the New York Stock Exchange under the symbol “TEF”. Citibank, N.A. acts as the Depositary pursuant to the deposit agreement dated as of November 13, 1996, as amended as of December 3, 1999 and as further amended as of June 23, 2000 and as of March 9, 2007 among Telefónica, the Depositary and the holders from time to time of ADSs.

For certain information on our ADSs, see Items 10 and 12.D of our Form 20-F, which is incorporated herein by reference. An applicable prospectus supplement for an offering of our ADSs will include a description of the ADSs and a description of the terms of any offering of ADSs, among other matters.

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DESCRIPTION OF RIGHTS TO SUBSCRIBE FOR ORDINARY SHARES

We may issue rights to subscribe for ordinary shares of Telefónica. The applicable prospectus supplement will describe the specific terms relating to such subscription rights and the terms of the offering, including, where applicable, some or all of the following, among other matters:

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DESCRIPTION OF DEBT SECURITIES AND GUARANTEES

Telefónica Emisiones may issue Debt Securities fully and unconditionally guaranteed by Telefónica under an indenture (the “Base Indenture”), dated April 20, 2018 among Telefónica Emisiones, the Guarantor and The Bank of New York Mellon, as trustee, as supplemented by a supplemental indenture with respect to each series of securities issued pursuant to the Base Indenture among Telefónica Emisiones, the Guarantor and the Bank of New York Mellon, as trustee, transfer agent, registrar and paying agent (the Base Indenture, as supplemented, the “Indenture”). The Base Indenture has been filed with the SEC as an exhibit to the Registration Statement of which this prospectus is a part and is incorporated by reference herein. Except as otherwise specified in the applicable prospectus supplement, the Debt Securities will constitute the direct, unconditional, unsubordinated and unsecured obligation of the issuer and will rank pari passu without any preference among themselves and, subject to any applicable statutory exceptions, the issuer’s payment obligations under the Debt Securities will rank at least pari passu with all of its other unsecured and unsubordinated indebtedness, present and future, except as its obligations may be limited by Spanish bankruptcy, insolvency, reorganization or other laws relating to or affecting the enforcement of creditors’ rights generally in the Kingdom of Spain.

The applicable prospectus supplement will describe the specific terms relating to such Debt Securities and the related guarantees and the terms of the offering, including, where applicable, some or all of the following, among other matters:

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ENFORCEABILITY OF CERTAIN CIVIL LIABILITIES

Telefónica is a limited liability company (sociedad anónima) organized under the laws of the Kingdom of Spain. Telefónica Emisiones, a wholly-owned subsidiary of Telefónica, is a limited liability company with a sole shareholder (sociedad anónima unipersonal) organized under the laws of the Kingdom of Spain. All of the directors of Telefónica Emisiones and the executive officers and directors of Telefónica, and certain of the experts named in this prospectus, are not residents of the United States. All or a substantial portion of the assets of Telefónica Emisiones and those of Telefónica and such persons are located outside the United States. As a result, it may be difficult for you to file a lawsuit against either Telefónica Emisiones or Telefónica or such persons in the United States with respect to matters arising under the federal securities laws of the United States. It may also be difficult for you to enforce judgments obtained in U.S. courts against either Telefónica Emisiones or Telefónica or such persons based on the civil liability provisions of such laws. Provided that United States case law does not prevent the enforcement in the U.S. of Spanish judgments (as in such case, judgments obtained in the U.S. shall not be enforced in Spain), if a U.S. court grants a final judgment in an action based on the civil liability provisions of the federal securities laws of the United States, enforceability of such judgment in Spain will be subject to satisfaction of certain factors. Such factors include the absence of a conflicting judgment by a Spanish court (or a conflicting judgment by a foreign court, provided such judgment meets the requirements to be enforced in Spain) or of an action pending in Spain among the same parties and arising from the same facts and circumstances, the Spanish courts’ determination that the U.S. courts had jurisdiction, that process was appropriately served on the defendant, the regularity of the proceeding followed before the U.S. courts, the authenticity of the judgment and that enforcement would not violate Spanish public policy or mandatory provisions, including the legality of the obligation to be fulfilled in Spain, and that such judgment is final and conclusive. In general, the enforceability in Spain of final judgments of U.S. courts does not require retrial in Spain. If an action is commenced before Spanish courts with respect to liabilities based on the U.S. federal securities laws, there is a doubt as to whether Spanish courts would have jurisdiction. Spanish courts may enter and enforce judgments in foreign currencies.

Telefónica Emisiones and Telefónica have expressly submitted to the exclusive jurisdiction of any state or federal court in the Borough of Manhattan, the City of New York and any appellate court from any such court thereof for the purpose of any suit, action or proceeding arising out of or in connection with the Debt Securities described herein and have appointed CT Corporation System as our agent to accept service of process in any such action.

LEGAL MATTERS

Certain legal matters with respect to Spanish law will be passed upon for us by Uría Menéndez Abogados, S.L.P., our Spanish counsel. Certain legal matters with respect to United States and New York law will be passed upon for us by Davis Polk & Wardwell LLP, our U.S. counsel.

EXPERTS

The consolidated financial statements as of December 31, 2017 and for the year ended December 31, 2017 and management’s assessment of the effectiveness of Telefónica’s internal control over financial reporting (which is included in Management’s Annual Report on Internal Control over Financial Reporting) as of December 31, 2017, each incorporated into this Prospectus by reference to Telefónica’s Annual Report on Form 20-F for the year ended December 31, 2017, have been so incorporated in reliance on the report of PricewaterhouseCoopers Auditores, S.L., an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting. In addition, the adjustments to the 2016 consolidated financial statements to retrospectively reflect the change in presentation of the segment information, as described in Note 4 to the consolidated financial statements of Telefónica included in its Annual Report on Form 20-F for the year ended December 31, 2017, have been audited by PricewaterhouseCoopers Auditores, S.L., as set forth in their report.

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The consolidated financial statements as of December 31, 2016 and for each of the two years in the period then ended, before the effects of the retrospective adjustments related to the 2016 segment disclosures described in Note 4 (the “Unadjusted 2016 and 2015 Consolidated Financial Statements”), appearing in the Form 20-F, have been audited by Ernst & Young, S.L., independent registered public accounting firm, as set forth in their report thereon, included therein, and incorporated herein by reference. The Unadjusted 2016 and 2015 Consolidated Financial Statements are incorporated herein by reference in reliance upon such report given on the authority of such firm as experts in accounting and auditing.

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TELEFÓNICA EMISIONES, S.A.U.

$1,250,000,000 FIXED RATE SENIOR NOTES DUE 2049

guaranteed by:

Telefónica, S.A.

Prospectus Supplement

Joint Book-Running Managers

February 26, 2019