EX-4.21





 Exhibit 4.21 

The issue of this Note has been given Registration
No. 30-2020-E by the Ministry of Finance and Public Credit of Mexico on October 13, 2020. 

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR
REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IN EXCHANGE FOR THIS CERTIFICATE OR ANY PORTION HEREOF IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF CEDE & CO.), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO
ANY PERSON OTHER THAN THE DEPOSITORY TRUST COMPANY OR A NOMINEE THEREOF IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 

THIS NOTE IS A U.S. GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE REFERRED TO HEREINAFTER. THIS NOTE MAY NOT BE EXCHANGED, IN WHOLE OR
IN PART, FOR A NOTE REGISTERED IN THE NAME OF ANY PERSON OTHER THAN THE DEPOSITORY TRUST COMPANY OR A NOMINEE THEREOF EXCEPT IN THE LIMITED CIRCUMSTANCES SET FORTH IN SECTION 3.05(a) OF THE INDENTURE. 












 PETRÓLEOS MEXICANOS 

(A Productive State-Owned Company of the Federal Government of the United Mexican States) 

6.875% Notes due 2025 

Jointly and Severally Guaranteed by 

PEMEX EXPLORACIÓN Y PRODUCCIÓN, PEMEX TRANSFORMACIÓN 

INDUSTRIAL AND PEMEX LOGÍSTICA 

AND THEIR RESPECTIVE SUCCESSORS AND ASSIGNEES 

REGISTERED 
 NO. R-• 

The following summary of terms is subject to the information set forth on the reverse hereof. 

 

			
	PRINCIPAL AMOUNT:	  	U.S. $•
	SPECIFIED CURRENCY:	  	U.S. dollars (“U.S. $” or “$”)
	STATED MATURITY:	  	October 16, 2025
	ISSUE DATE:	  	•
	CUSIP NO.:	  	71654Q DH2
	INTEREST PAYMENT DATES:	  	April 16 and October 16 of each year, commencing on April 16, 2022.
	PRINCIPAL PAYING AGENT AND TRANSFER AGENT:	  	Deutsche Bank Trust Company Americas
	PAYING AGENTS AND TRANSFER AGENTS:	  	Deutsche Bank Luxembourg S.A.

 Petróleos Mexicanos (herein called “Petróleos Mexicanos” or the “Issuer,”
which terms include any successor entity under the Indenture hereinafter referred to), a productive state-owned company of the Federal Government (the “Mexican Government”) of the United Mexican States (“Mexico”), for value
received, hereby promises, in accordance with and subject to the provisions set forth on the face and reverse hereof, to pay to Cede & Co., or registered assigns, at the Stated Maturity specified above or on such earlier date as the same
may become payable in accordance with the terms hereof, the principal amount specified above in U.S. dollars or such other redemption amount as may be specified herein, and to pay in arrears on the dates specified herein interest on such
principal amount at the rate or rates specified herein, until the principal amount hereof is paid or made available for payment. 
 Unless
defined herein, capitalized terms used herein shall have the meanings assigned to them on the reverse hereof and in the indenture dated as of January 27, 2009, between Petróleos Mexicanos, as the Issuer, and Deutsche Bank Trust Company
Americas, as trustee (the “Trustee,” which expression shall include any successor to Deutsche Bank Trust Company Americas, in its capacity as such), as amended and supplemented by (i) the first supplemental indenture, dated as of
June 2, 2009, entered into among the Issuer, the Trustee and Deutsche Bank AG, London Branch, as international paying and authenticating agent, (ii) the second supplemental indenture, dated as of October 13, 2009, entered into among
the Issuer, the Trustee, Credit Suisse AG, as principal Swiss paying and authenticating agent, and BNP Paribas (Suisse) SA, as an additional Swiss paying agent, (iii) the third supplemental indenture, dated as of April 10, 2012, entered
into among the Issuer, the Trustee and Credit Suisse AG, as Swiss paying and authenticating agent, (iv) the fourth supplemental indenture, dated as of June 24, 2014, entered into between the Issuer and the Trustee, (v) the fifth
supplemental indenture, dated as of October 15, 2014, entered into between the Issuer and the Trustee, (vi) the sixth supplemental indenture, dated as of December 8, 2015, entered into among the Issuer, the Trustee, BNP Paribas
(Suisse) SA, as principal Swiss paying and authenticating agent, and Credit Suisse AG, as an additional Swiss paying agent, (vii) the seventh supplemental indenture, dated as of June 14, 2016, entered into among the Issuer, the Trustee,
Credit Suisse AG, as principal Swiss paying and authenticating agent, and UBS AG, as an additional Swiss paying agent, (viii) the eighth supplemental indenture, dated as of February 16, 2018, entered into between the Issuer and the Trustee
and (ix) the ninth supplemental indenture, dated as of June 4, 2018, entered into among the Issuer, the Trustee, BNP Paribas (Suisse) SA, as principal Swiss paying and authenticating agent, and UBS AG, as an additional Swiss paying agent
(as amended and supplemented, the “Indenture”). 
 Reference is hereby made to the further provisions of this Note set forth on
the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. 
 Unless the
certificate of authentication hereon has been executed by the Trustee by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 












 IN WITNESS WHEREOF, the Issuer has caused this Note to be duly executed. 

Dated: • 
  

	
	 PETRÓLEOS MEXICANOS

	
	By:                                     
                                    
	Name: Emmanuel Quevedo Hernández
	Title:   Managing Director of Treasury


 CERTIFICATE OF AUTHENTICATION 

This is one of the series of Securities designated herein issued under the within-mentioned Indenture. 

Dated: • 
  

	
	 DEUTSCHE BANK TRUST COMPANY AMERICAS, as Trustee

	
	By:                                     
                                    
	 Authorized Signatory




  
 F-3 













 REVERSE OF NOTE 

1. This Note is one of a duly authorized series of Securities of Petróleos Mexicanos (the “Issuer”) designated as its
U.S. $1,500,000,000 6.875% Notes due 2025 (the “Notes”), issued and to be issued in accordance with an indenture dated as of January 27, 2009, between the Issuer and Deutsche Bank Trust Company Americas, as trustee (herein called
the “Trustee,” which term includes any successor trustee under the Indenture), as amended and supplemented by (i) the first supplemental indenture, dated as of June 2, 2009, entered into among the Issuer, the Trustee and Deutsche
Bank AG, London Branch, as international paying and authenticating agent, (ii) the second supplemental indenture, dated as of October 13, 2009, entered into among the Issuer, the Trustee, Credit Suisse AG, as principal Swiss paying and
authenticating agent, and BNP Paribas (Suisse) SA, as an additional Swiss paying agent, (iii) the third supplemental indenture, dated as of April 10, 2012, entered into among the Issuer, the Trustee and Credit Suisse AG, as Swiss paying
and authenticating agent, (iv) the fourth supplemental indenture, dated as of June 24, 2014, entered into between the Issuer and the Trustee, (v) the fifth supplemental indenture, dated as of October 15, 2014, entered into
between the Issuer and the Trustee, (vi) the sixth supplemental indenture, dated as of December 8, 2015, entered into among the Issuer, the Trustee, BNP Paribas (Suisse) SA, as principal Swiss paying and authenticating agent, and Credit
Suisse AG, as an additional Swiss paying agent, (vii) the seventh supplemental indenture, dated as of June 14, 2016, entered into among the Issuer, the Trustee, Credit Suisse AG, as principal Swiss paying and authenticating agent, and UBS
AG, as an additional Swiss paying agent, (viii) the eighth supplemental indenture, dated as of February 16, 2018, entered into between the Issuer and the Trustee, and (ix) the ninth supplemental indenture, dated as of June 4,
2018, entered into among the Issuer, the Trustee, BNP Paribas (Suisse) SA, as principal Swiss paying and authenticating agent, and UBS AG, as an additional Swiss paying agent (as amended and supplemented, the “Indenture”), copies of which
Indenture are on file and available for inspection at the Corporate Trust Office of the Trustee in the Borough of Manhattan, The City of New York and, so long as the Notes are listed on the Luxembourg Stock Exchange and such Exchange shall so
require, at the office of the Paying Agent in Luxembourg. Reference is hereby made to the Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Issuer and the Holders of the Notes and of
the terms upon which the Notes are, and are to be, authenticated and delivered. The Notes are initially limited to an aggregate initial principal amount of U.S. $1,500,000,000, subject to increase as provided in Paragraph 10 below. Capitalized
terms not otherwise defined herein or on the face of this Note shall have the meanings assigned to them in the Indenture. 
 The Notes are
direct, unsecured and unsubordinated Public External Indebtedness (as defined in Paragraph 8 below) of the Issuer for money borrowed and will at all times rank pari passu with each other. The payment obligations of the Issuer under the
Notes will, except as may be provided by applicable law and subject to Section 10.06 of the Indenture, at all times rank pari passu with all other present and future unsecured and unsubordinated Public External Indebtedness for money
borrowed of the Issuer. The Notes are not obligations of, or guaranteed by, the United Mexican States (“Mexico”). 
 The
Issuer’s payment obligations under the Notes and the Indenture will have the benefit of unconditional, joint and several guaranties (the “Guaranties”) as to payment of principal, interest and any other amounts payable by the Issuer
under the Notes from each of Pemex Exploración y Producción, Pemex Transformación Industrial, Pemex Logística and their respective successors and assignees, each a productive state-owned company of the Federal Government
(each, a “Guarantor” and, together, the “Guarantors”), pursuant to a guaranty agreement, dated July 29, 1996 (the “Guaranty Agreement”), among the Issuer and Pemex-Exploración y Producción,
Pemex-Refinación and Pemex-Gas y Petroquímica Básica, each a decentralized public entity and former subsidiary entity of Petróleos Mexicanos, whose rights and obligations under the
Guaranty Agreement were expressly assumed by the Guarantors effective as of November 1, 2015. The Issuer has designated each of the Indenture and the Notes as obligations of the Issuer entitled to the benefits of the Guaranty Agreement,
pursuant to certificates of designation, each dated January 27, 2009, January 14, 2010, December 22, 2010, January 22, 2013, January 31, 2014, January 22, 2015, January 25, 2016, February 9, 2017,
April 17, 2018, October 28, 2019, January 21, 2020 and October 16, 2020, respectively (the “Certificates of Designation”). 

The Notes are denominated in U.S. dollars. Payments on the Notes will be made in U.S. dollars. The Notes are issuable only in fully registered
form, without interest coupons. The Notes are issuable in authorized denominations of U.S. $10,000 and integral multiples of U.S. $1,000 in excess thereof. 

2. (a) The Notes will bear interest from October 16, 2021, or from the most recent Interest Payment Date to which interest has been paid
or duly provided for, at the interest rate of 6.875% per annum, until the principal hereof has been paid or duly made available for payment. The interest on this Note shall be payable in arrears on each Interest Payment Date specified on the face
hereof, and shall be computed on the basis of a 360-day year consisting of twelve 30-day months. Any payment on this Note due on any day which is not a Business Day in
The City of New York or the place of payment need not be made on such day, but may be made on the next succeeding Business Day with the same force and effect as if made on the due date, and no interest shall accrue for the period from and after such
due date. “Business Day,” as used herein with respect to any particular location, means each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in such location are authorized or obligated by
law to close in such location. 












 (b) The interest so payable, and punctually paid or duly provided for, on any Interest
Payment Date will be paid to the person in whose name this Note (or one or more predecessor Notes) is registered at the close of business on the 15th day (whether or not a Business Day) (the “Regular Record Date”) next preceding such
Interest Payment Date; provided that interest payable at Stated Maturity will be payable to the person to whom principal shall be payable; and provided, further, that if this Note is a Global Security, any payment of interest on this Note shall
be made to the applicable Depositary or its nominee, as the registered owner hereof. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to
the person in whose name this Note (or one or more predecessor Notes) is registered at the close of business on a special record date for the payment of such defaulted interest to be fixed by the Trustee, notice whereof shall be given to Holders of
Notes not less than 10 days prior to such special record date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Notes may be listed, and upon such notice as may be
required by such exchange. 
 (c) Payment of principal (and premium, if any) and any interest due with respect to the Notes at Stated
Maturity will be made in immediately available funds upon surrender of such Notes at the corporate trust office of the Trustee in the Borough of Manhattan, The City of New York, or at the specified office of any other Paying Agent, provided
that the Note is presented to the Paying Agent in time for the Paying Agent to make such payments in such funds in accordance with its normal procedures. Payments of principal (and premium, if any) and any interest in respect of this Note to be made
other than at Stated Maturity or upon redemption will be made by check mailed on or before the due date for such payments to the address of the persons entitled thereto as they appear in the Security Register; provided that (i) the
applicable Depositary, as Holder of the Global Securities, shall be entitled to receive payments of interest by wire transfer of immediately available funds and (ii) a Holder of U.S. $10,000,000 in aggregate principal or face amount of
Notes having the same Interest Payment Date shall be entitled to receive payments of interest by wire transfer to an account maintained by such Holder at a bank located in the United States as may have been appropriately designated by such person to
the Paying Agent in writing no later than the relevant Regular Record Date. Unless such designation is revoked, any such designation made by such Holder with respect to such Note shall remain in effect with respect to any further payments with
respect to such Note payable to such Holder. 
 3. (a) The Issuer shall maintain in the Borough of Manhattan, The City of New York, an
office or agency where Notes may be surrendered for registration of transfer or exchange. The Issuer has initially appointed the Corporate Trust Office of the Trustee as its agent in the Borough of Manhattan, The City of New York, for such purpose
and has agreed to cause to be kept at such office a register in which, subject to such reasonable regulations as it may prescribe, the Issuer will provide for the registration of Notes and registration of transfers of Notes. The Issuer reserves the
right to vary or terminate the appointment of the Trustee as security registrar or of any Transfer Agent or to appoint additional or other registrars or Transfer Agents or to approve any change in the office through which any security registrar or
any Transfer Agent acts, provided that there will at all times be a security registrar in the Borough of Manhattan, The City of New York and, so long as the Notes are listed on the Luxembourg Stock Exchange and such Exchange shall so require,
a Transfer Agent in Luxembourg. 
 (b) The transfer or exchange of a Note is registrable on the aforementioned register upon surrender of
such Note at the Corporate Trust Office of the Trustee or any Transfer Agent duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Issuer and the Trustee duly executed by the Holder thereof or his attorney
duly authorized in writing. Upon such surrender of a Note for registration of transfer, the Issuer shall execute one or more new Notes of any authorized denominations and of a like form, tenor and terms and a like aggregate principal amount, and the
Trustee shall authenticate and deliver in the name of the designated transferee or transferees, such new Notes, dated the date of authentication thereof. At the option of the Holder upon request confirmed in writing, Notes may be exchanged for Notes
of any authorized denominations and of a like form, tenor and terms and a like aggregate principal amount upon surrender of the Notes to be exchanged at the office of any Transfer Agent or at the corporate trust office of the Trustee. Whenever any
Notes are so surrendered for exchange, the Issuer shall execute the Notes which the Holder making the exchange is entitled to receive, and the Trustee shall authenticate and deliver such Notes. 

  
 R-3 













 (c) Any registration of transfer or exchange will be effected upon the Transfer Agent or the
Trustee, as the case may be, being satisfied with the documents of title and identity of the person making the request and subject to such reasonable regulations as the Issuer may from time to time agree with any Transfer Agents and the Trustee.

 (d) In the event of a redemption of Notes in part (if permitted by the provisions hereof), the Issuer shall not be required (i) to
register the transfer of or exchange any Note during a period beginning at the opening of business 15 days before, and continuing until, the date on which notice is given identifying the Notes to be redeemed, or (ii) to register the transfer of
or exchange any Note, or portion thereof, called for redemption. 
 (e) All Notes issued upon any registration of transfer or exchange of
Notes shall be the valid obligations of the Issuer, evidencing the same debt, and entitled to the same benefits, as the Notes surrendered upon such registration of transfer or exchange. No service charge shall be made for any registration of
transfer or exchange, but the Issuer may require payment of a sum sufficient to cover any stamp tax or other governmental charge payable in connection therewith, other than an exchange in connection with a partial redemption of a Note not involving
any registration of a transfer. 
 Prior to due presentment of this Note for registration of transfer, the Issuer, each Guarantor, the
Trustee and any agent of the Issuer, any Guarantor or the Trustee may treat the person in whose name this Note is registered as the owner hereof for all purposes, whether or not this Note be overdue, and neither the Issuer, any Guarantor, the
Trustee nor any such agent shall be affected by any notice to the contrary. 
 4. The Issuer shall pay to the Trustee at its principal
office in the Borough of Manhattan, The City of New York, on or prior to 11:00 a.m., New York City time, on each Interest Payment Date, any Redemption Date and at the Stated Maturity of the Notes, in such amounts sufficient (with any amounts then
held by the Trustee and available for the purpose) to pay the interest on, the Redemption Price of and accrued interest (if the Redemption Date is not an Interest Payment Date) on, and the principal of, the Notes due and payable on such Interest
Payment Date, Redemption Date or Stated Maturity, as the case may be. The Trustee shall apply the amounts so paid to it to the payment of such interest, Redemption Price and principal in accordance with the terms of the Notes. Any monies paid by the
Issuer to the Trustee for the payment of the principal, premium (if any) or interest on any Notes and remaining unclaimed at the end of two years after such principal (or premium, if any) or interest shall have become due and payable (whether at the
Stated Maturity, upon call for redemption or otherwise) shall then be repaid to the Issuer upon its written request, and upon such repayment all liability of the Trustee with respect thereto shall cease, without, however, limiting in any way any
obligation the Issuer may have to pay the principal of (and premium, if any) and interest on each Note as the same shall become due. Notwithstanding the foregoing, the right of the Holders to receive any payment of principal of (whether on the
Stated Maturity, upon call for redemption or otherwise) or interest on the Notes will become void at the end of five years after the due date for such payment. 

  
 R-4 













 5. (a) The Issuer will pay all stamp and other duties, if any, which may be imposed by the
United States or any political subdivision thereof or taxing authority of or in the foregoing with respect to the Indenture or the issuance of this Note. Except as otherwise provided herein, the Issuer shall not be required to make any payment with
respect to any tax, assessment or other governmental charge imposed by any government or any political subdivision or taxing authority thereof or therein. 

(b) The Issuer, or, in the case of a payment by a Guarantor, such Guarantor, will pay to the Holder of this Note such additional amounts
(“Additional Amounts”) as may be necessary in order that every net payment made by the Issuer or a Guarantor on this Note after deduction or withholding for or on account of any present or future tax, assessment or other governmental
charge imposed upon or as a result of such payment by Mexico or any political subdivision or taxing authority thereof or therein (“Mexican Withholding Taxes”), will not be less than the amount provided for in this Note and in the Indenture
to be then due and payable on this Note. The foregoing obligation to pay Additional Amounts, however, will not apply to (i) any Mexican Withholding Taxes that would not have been imposed or levied on the Holder of this Note but for the
existence of any present or former connection between such Holder and Mexico or any political subdivision or territory or possession thereof or area subject to its jurisdiction, including, without limitation, such Holder (A) being or having
been a citizen or resident thereof, (B) maintaining or having maintained an office, permanent establishment or branch therein, or (C) being or having been present or engaged in trade or business therein, except for a connection solely
arising from the mere ownership of, or receipt of payment under, this Note; (ii) except as otherwise provided, any estate, inheritance, gift, sales, transfer or personal property or similar tax, assessment or other governmental charge;
(iii) any Mexican Withholding Taxes that are imposed or levied by reason of the failure by such Holder to comply with any certification, identification, information, documentation, declaration or other reporting requirement that is required or
imposed by a statute, treaty, regulation, general rule or administrative practice as a precondition to exemption from, or reduction in the rate of, the imposition, withholding or deduction of any Mexican Withholding Taxes; provided that at
least 60 days prior to (A) the first payment date with respect to which the Issuer or a Guarantor shall apply this clause (iii) and, (B) in the event of a change in such certification, identification, information, documentation,
declaration or other reporting requirement, the first payment date subsequent to such change, the Issuer or a Guarantor, as the case may be, shall have notified the Trustee in writing that the Holders of Notes will be required to provide such
certification, identification, information or documentation, declaration or other reporting; (iv) any Mexican Withholding Taxes imposed at a rate in excess of 4.9% in the event that such Holder has failed to provide on a timely basis, at the
reasonable request of the Issuer, information or documentation (not described in clause (iii) above) concerning such Holder’s eligibility, if any, for benefits under an income tax treaty that is in effect to which Mexico is a party that is
necessary to determine the appropriate rate of deduction or withholding of Mexican Withholding Taxes under any such treaty; (v) any Mexican Withholding Taxes that would not have been so imposed but for the presentation by such Holder of this
Note for payment on a date more than 15 days after the date on which such payment became due and payable or the date on which payment thereof is duly provided for, whichever occurs later; (vi) any payment on this Note to any Holder who is a
fiduciary or partnership or other than the sole beneficial owner of any such payment, to the extent that a beneficiary or settlor with respect to such fiduciary, a member of such a partnership or the beneficial owner of such payment would not have
been entitled to the Additional Amounts had such beneficiary, settlor, member or beneficial owner been the Holder of this Note; or (vii) a Note presented for payment by or on behalf of a Holder who would have been able to avoid such withholding
or deduction by presenting the relevant Note to another Paying Agent in a member state of the European Union. All references in this Note or in the Indenture to principal, premium, if any, interest and Redemption Price or any other amount payable
under or with respect to the Notes shall, unless the context otherwise requires, be deemed to mean and include all Additional Amounts, if any, payable in respect thereof as set forth in this paragraph (b). 

  
 R-5 













 (c) Notwithstanding the foregoing, the limitations on the Issuer’s and the
Guarantors’ obligation to pay Additional Amounts set forth in clauses (iii) and (iv) of paragraph (b) above shall not apply if the provision of the certification, identification, information, documentation, declaration or other
evidence described in such clauses (iii) and (iv) would be materially more onerous, in form, in procedure or in the substance of information disclosed, to a Holder or beneficial owner of this Note (taking into account any relevant differences
between United States and Mexican law, regulation or administrative practice) than comparable information or other applicable reporting requirements imposed or provided for under United States federal income tax law (including the United
States-Mexico Income Tax Treaty), regulation (including proposed regulations) and administrative practice. In addition, the limitations on the Issuer’s and the Guarantors’ obligation to pay Additional Amounts set forth in clauses
(iii) and (iv) of paragraph (b) above shall not apply if Article 166, Section II, paragraph a) of the Mexican Income Tax Law (or a substantially similar successor of such provision) is in effect, unless (A) the
provision of the certification, identification, information, documentation, declaration or other evidence described in clauses (iii) and (iv) is expressly required by statute, regulation, general rules or administrative practice in order to
apply Article 166, Section II, paragraph a) of the Mexican Income Tax Law (or a substantially similar successor of such provision), the Issuer or the applicable Guarantor cannot obtain such certification, identification, information,
documentation, declaration or evidence, or satisfy any other reporting requirements, on its own through reasonable diligence and the Issuer or the applicable Guarantor otherwise would meet the requirements for application of Article 166,
Section II, paragraph a) of the Mexican Income Tax Law (or such successor provision) or (B) in the case of a Holder or beneficial owner of a Note that is a pension fund or other tax-exempt organization,
such Holder or beneficial owner would be subject to Mexican Withholding Taxes at a rate less than that provided by Article 166, Section II, paragraph a) of the Mexican Income Tax Law (or such successor provision) if the information,
documentation or other evidence required under clause (iv) of paragraph (b) above were provided. In addition, clauses (iii) and (iv) of paragraph (b) above shall not be construed to require that a
non-Mexican pension or retirement fund, a non-Mexican tax-exempt organization or a
non-Mexican financial institution or any other Holder or beneficial owner of this Note register with the Ministry of Finance and Public Credit of Mexico for the purpose of establishing eligibility for an
exemption from or reduction of Mexican Withholding Taxes. 
 (d) The Issuer or a Guarantor, as the case may be, will, upon written request,
provide the Trustee, the Holders and the Paying Agents with a duly certified or authenticated copy of an original receipt of the payment of Mexican Withholding Taxes which such Issuer or Guarantor has withheld or deducted in respect of any payments
made under or with respect to the Notes or the Guaranties, as the case may be. 
 (e) Any reference herein or in the Indenture to principal,
interest, Redemption Price or any other amount payable under or with respect to the Notes will be deemed also to refer to any Additional Amounts which may be payable under the undertakings referred to herein. 

(f) In the event that Additional Amounts actually paid with respect to this Note are based on rates of deduction or withholding of Mexican
Withholding Taxes in excess of the appropriate rate applicable to the Holder or beneficial owner of this Note, and, as a result thereof, such Holder or beneficial owner is entitled to make a claim for a refund or credit of such excess, then such
Holder or beneficial holder shall, by accepting this Note, be deemed to have assigned and transferred all right, title and interest to any such claim for a refund or credit of such excess to the Issuer or the applicable Guarantor, as the case may
be. However, by making such assignment, the Holder or beneficial owner makes no representation or warranty that the Issuer or the applicable Guarantor, as the case may be, will be entitled to receive such claim for a refund or credit and such Holder
or beneficial owner incurs no other obligation with respect thereto. 
 6. (a) This Note may not be redeemed prior to the Stated Maturity,
except as specified in paragraphs (b) and (c) below. 
 (b) The Notes may be redeemed at the option of the Issuer in whole, but not in
part, at any time, together, if applicable, with interest accrued to but excluding the date fixed for redemption, at par, on giving not less than 30 nor more than 60 days’ notice to the Holders of the Notes (which notice shall be irrevocable),
if (i) the Issuer or any Guarantor certifies to the Trustee immediately prior to the giving of such notice that it has or will become obligated to pay Additional Amounts in excess of the Additional Amounts that it would be obligated to pay if
payments (including payments of interest) on the Notes (or payments under the Guaranties with respect to interest on the Notes) were subject to Mexican Withholding Tax at a rate of 10%, as a result of any change in, amendment to, or lapse of, the
laws, rules or regulations of Mexico or any political subdivision or any taxing authority thereof or therein affecting taxation, or any change in, or amendment to, an official interpretation or application of such laws, rules or regulations, which
change or amendment becomes effective on or after the date of issuance of the Notes and (ii) prior to the publication of any notice of redemption, the Issuer or any Guarantor shall deliver to the Trustee an Officer’s Certificate stating
that the obligation referred to in (i) above cannot be avoided by the Issuer or such Guarantor, as the case may be, taking reasonable measures available to it, and the Trustee shall be entitled to accept such certificate as sufficient evidence
of the satisfaction of the condition precedent set out in (i) above in which event it shall be conclusive and binding on the Holders of the Notes; provided that no such notice of redemption shall be given earlier than 90 days prior to
the earliest date on which the Issuer or such Guarantor, as the case may be, would be obligated but for such redemption to pay such Additional Amounts were a payment in respect of the Notes then due and, at the time such notice is given, such
obligation to pay such Additional Amounts remains in effect. 

  
 R-6 













 (c) The Notes are subject to redemption upon not less than 30 nor more than 60 days’
notice by mail, in whole or in part, at any time or from time to time prior to Stated Maturity, as specified below. 
 (i)
Prior to the Par Call Date (as defined below), at a Redemption Price equal to the sum of (A) 100% of the principal amount of such Notes and (B) the Make-Whole Amount (as defined below), plus accrued interest on the principal amount of the Notes
to the date of redemption. 
 (ii) On or after the Par Call Date, at a Redemption Price equal to 100% of the principal amount
of such Notes plus accrued interest on the principal amount of the Notes to the date of redemption. 
 (iii) “Par Call
Date” means September 16, 2025 (the date that is one month prior to the stated maturity of the Notes). “Make-Whole Amount” means the excess of (i) the sum of the present values of the Remaining Payments (as defined below),
discounted to the Redemption Date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate (as defined below) plus 50
basis points over (ii) the principal amount of such Notes. “Treasury Rate” means, with respect to any Redemption Date, the rate per annum equal to the semi-annual equivalent yield to maturity or interpolated maturity of the Comparable
Treasury Issue (as defined below), assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price (as defined below) for such Redemption Date. “Comparable Treasury
Issue” means the United States Treasury security or securities selected by an Independent Investment Banker (as defined below) as having an actual or interpolated maturity comparable to the Par Call Date of the Notes to be redeemed 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 a comparable maturity to the Par Call Date of such Notes. “Independent Investment Banker”
means one of the Reference Treasury Dealers (as defined below) appointed by the Issuer. “Comparable Treasury Price” means, with respect to any Redemption Date, the average of the Reference Treasury Dealer Quotations (as defined below) for
such Redemption Date. “Reference Treasury Dealer” means each of BofA Securities, Inc., Goldman Sachs & Co. LLC, Mizuho Securities USA LLC and a Reference Treasury Dealer selected by SMBC Nikko Securities America, Inc., or their
affiliates which are primary United States government securities dealers, and their respective successors; provided that if any of the foregoing shall cease to be a primary United States government securities dealer in the City of
New York (a “Primary Treasury Dealer”), the Issuer will substitute therefor another Primary Treasury Dealer. “Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury Dealer and any Redemption
Date, the average, as determined by the Trustee, of the bid and asked prices for the Comparable Treasury Issue (expressed in case as a percentage of its principal amount) quoted in writing to the Trustee by such Reference Treasury Dealer at 3:30
p.m. New York City time on the third business day preceding such Redemption Date. “Remaining Payments” means each remaining scheduled payment of principal and interest on the Notes to be redeemed (exclusive of interest accrued to the date
of redemption) that would be due after the related redemption date as if such Notes were redeemed on the Par Call Date. If such redemption date is not an interest payment date with respect to the Notes, the amount of the next succeeding scheduled
interest payment on the Notes will be reduced by the amount of interest accrued on the Notes to such Redemption Date. 

  
 R-7 













 (d) The Issuer or any Guarantor may at any time purchase Notes at any price in the open
market or otherwise. Notes so purchased by the Issuer or any Guarantor shall be surrendered to the Trustee for cancellation. 
 7. This Note
is not repayable prior to the Stated Maturity at the option of the Holder. 
 8. If any of the following events (each, an “Event of
Default”) occurs and is continuing, the Trustee, if so requested in writing by Holders of at least 20% in principal amount of the Notes then outstanding, shall give notice to the Issuer that the Notes are, and they shall immediately become, due
and payable at their principal amount together with accrued interest: 
 (a)
Non-Payment: default is made in payment of principal (or any part thereof) of or any interest on any of the Notes when due and such failure continues, in the case of non-payment of principal for seven days, or, in the case of non-payment of interest, for fourteen days after the due date; or 

(b) Breach of Other Obligations: the Issuer defaults in performance or observance of or compliance with any of
its other obligations set out in the Notes or the Guaranties or (insofar as it concerns the Notes or the Guaranties) the Indenture which default is incapable of remedy or, if capable of remedy, is not remedied within 30 days after written notice of
such default shall have been given to the Issuer and the Guarantors by the Trustee; or 
 (c) Cross-Default:
default by the Issuer or any of the Issuer’s Material Subsidiaries (as defined below) or the Guarantors or any of them or any of their respective Material Subsidiaries in the payment of the principal of, or interest on, any Public External
Indebtedness (as defined below) of, or guaranteed by, the Issuer or any of the Issuer’s Material Subsidiaries or the Guarantors or any of them or any of their respective Material Subsidiaries, in an aggregate principal amount exceeding
U.S. $40,000,000 or its equivalent, when and as the same shall become due and payable, if such default shall continue for more than the period of grace, if any, originally applicable thereto; or 

(d) Enforcement Proceedings: a distress or execution or other legal process is levied or enforced or sued out
upon or against any substantial part of the property, assets or revenues of the Issuer or any of the Issuer’s Material Subsidiaries or the Guarantors or any of them or any of their respective Material Subsidiaries and is not discharged or
stayed within 60 days of having been so levied, enforced or sued out; or 
 (e) Security Enforced: an
encumbrancer takes possession or a receiver, manager or other similar officer is appointed of the whole or any substantial part of the undertaking, property, assets or revenues of the Issuer or any of the Issuer’s Material Subsidiaries or the
Guarantors or any of them or any of their respective Material Subsidiaries; or 

  
 R-8 













 (f) Insolvency: the Issuer or any of the Issuer’s Material
Subsidiaries or the Guarantors or any of them or any of their respective Material Subsidiaries becomes insolvent or is generally unable to pay its debts as they mature or applies for or consents to or suffers the appointment of an administrator,
liquidator, receiver or similar officer of the Issuer or any of the Issuer’s Material Subsidiaries or the Guarantors or any of them or any of their respective Material Subsidiaries or the whole or any substantial part of the undertaking,
property, assets or revenues of the Issuer or any of the Issuer’s Material Subsidiaries or the Guarantors or any of them or any of their respective Material Subsidiaries or takes any proceeding under any law for a readjustment or deferment of
its obligations or any part of them for insolvency, bankruptcy, concurso mercantil, reorganization, dissolution or liquidation or makes or enters into a general assignment or an arrangement or composition with or for the benefit of its
creditors or stops or threatens to cease to carry on its business or any substantial part of its business; or 
 (g) Winding-up: an order is made or an effective resolution passed for winding up the Issuer or any of the Issuer’s Material Subsidiaries or the Guarantors or any of them or any of their respective
Material Subsidiaries; or 
 (h) Moratorium: a general moratorium is agreed or declared in respect of any
External Indebtedness (as defined below) of the Issuer or any of the Issuer’s Material Subsidiaries or the Guarantors or any of them or any of their respective Material Subsidiaries; or 

(i) Authorization and Consents: any action, condition or thing (including the obtaining or effecting of any
necessary consent, approval, authorization, exemption, filing, license, order, recording or registration) at any time required to be taken, fulfilled or done in order (i) to enable the Issuer lawfully to enter into, exercise its rights and
perform and comply with its obligations under such Notes, the Indenture and the Guaranty Agreement or any of the Guarantors lawfully to enter into, perform and comply with its obligations under the Guaranty Agreement in relation to such Notes and
(ii) to ensure that those obligations are legally binding and enforceable, is not taken, fulfilled or done within 30 days of its being so required; or 

(j) Illegality: it is or becomes unlawful for (i) the Issuer to perform or comply with one or more of its
obligations under any of such Notes, the Indenture or the Guaranty Agreement or (ii) the Guarantors or any of them to perform or comply with one or more of its obligations under the Guaranty Agreement with respect to such Notes; or 

(k) Control: the Issuer ceases to be a public-sector entity of the Mexican Government or the Mexican Government
otherwise ceases to control the Issuer or any Guarantor; or the Issuer or any of the Guarantors shall be dissolved, disestablished or suspends its respective operations, and such dissolution, disestablishment or suspension of operations is material
in relation to the business of the Issuer and the Guarantors taken as a whole; or the Issuer, the Guarantors, and entities that they control cease to be, in the aggregate, the primary public-sector entities that conduct on behalf of Mexico the
activities of exploration, extraction, refining, transportation, storage, distribution and first-hand sale of crude oil and exploration, extraction, production and first-hand sale of gas; for purposes of this provision, the term “primary”
refers to the production of at least 75% of the barrels of oil equivalent of crude oil and gas produced by public-sector entities in Mexico; or 

(l) Disposals: 

(i) the Issuer ceases to carry on all or a substantial part of its business, or sells, transfers or otherwise disposes (whether
voluntarily or involuntarily) of all or substantially all of its assets (whether by one transaction or a series of transactions whether related or not) other than (A) solely in connection with the implementation of the Ley de
Petróleos Mexicanos (the “Petróleos Mexicanos Law”) or (B) to a Guarantor; or 
 (ii) any
Guarantor ceases to carry on all or a substantial part of its business, or sells, transfers or otherwise disposes (whether voluntarily or involuntarily) of all or substantially all of its assets (whether by one transaction or a series of
transactions whether related or not) and such cessation, sale, transfer or other disposal is material in relation to the business of the Issuer and the Guarantors taken as a whole; or 

(m) Analogous Events: any event occurs which under the laws of Mexico has an analogous effect to any of the
events referred to in paragraphs (d) to (g) above; or 
 (n) Guaranties: the Guaranty Agreement is not (or is
claimed by the Issuer or any of the Guarantors not to be) in full force and effect. 
 “External Indebtedness”
means Indebtedness which is payable, or at the option of its Holder may be paid, (i) in a currency or by reference to a currency other than the currency of Mexico, (ii) to a person resident or having its head office or its principal
place of business outside Mexico and (iii) outside the territory of Mexico. 
 “Guarantee” means any
obligation of a person to pay the Indebtedness of another person, including without limitation: 
 (i) an obligation to pay
or purchase such Indebtedness; or 
 (ii) an obligation to lend money or to purchase or subscribe for shares or other
securities or to purchase assets or services in order to provide funds for the payment of such Indebtedness; or 
 (iii) any
other agreement to be responsible for such Indebtedness. 
 “Indebtedness” means any obligation (whether
present or future, actual or contingent) for the payment or repayment of money which has been borrowed or raised (including money raised by acceptances and leasing). 

  
 R-9 













 “Material Subsidiaries” means, at any time, each of the Guarantors
and any Subsidiary of the Issuer or any of the Guarantors having, as of the end of the most recent fiscal quarter of the Issuer, total assets greater than 12% of the total assets of the Issuer, the Guarantors and their Subsidiaries on a consolidated
basis. 
 “Public External Indebtedness” means any External Indebtedness which is in the form of, or
represented by, notes, bonds or other securities which are for the time being quoted, listed or ordinarily dealt in on any stock exchange. 

“Subsidiary” means, in relation to any person, any other person (whether or not now existing) which is
controlled directly or indirectly by, or more than 50 percent of whose issued equity share capital (or equivalent) is then held or beneficially owned by, the first person and/or any one or more of the first person’s Subsidiaries, and
“control” means the power to appoint the majority of the members of the governing body or management of, or otherwise to control the affairs and policies of, that person. 

After any such acceleration has been made, but before a judgment or decree for the payment of money due based on acceleration has been
obtained by the Trustee, the Holders of a majority in aggregate principal amount of the Notes then outstanding may rescind and annul such acceleration if all Events of Default, other than the non-payment of
the principal of the Notes that have become due solely by such declaration of acceleration have been cured or waived as provided in the Indenture. 

9. The Indenture permits, with certain exceptions as therein provided, amendments, modifications and supplements of the rights and obligations
of the Issuer and the rights of the Holders of the Notes under the Indenture and the Notes at any time to be made by the Issuer and the Trustee with the consent of the Holders of specified percentages in principal amount of the Notes at the time
Outstanding, on behalf of the Holders of all Notes. The Indenture also contains provisions permitting the Holders of specified percentages in principal amount of the Notes at the time Outstanding, on behalf of the Holders of all Notes, to waive
compliance by the Issuer with certain provisions of the Indenture and certain past defaults under the Indenture or the Notes and their consequences. Any such consent or waiver by the Holder of this Note shall be conclusive and binding upon such
Holder and upon all future Holders of this Note and of any Note issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note. 

10. The Issuer may from time to time without the consent of any Holder of Notes create and issue additional notes having the same terms and
conditions as Notes previously issued (or the same except the first payment of interest or the issue price), which additional notes may be consolidated to form a single series with the outstanding Notes; provided that such additional notes do
not have, for purposes of U.S. federal income taxation, a greater amount of original issue discount than the Notes have as of the date of the issue of such additional notes. 

11. No reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligations of the
Issuer, which are absolute and unconditional, to pay the principal and premium (if any) of and interest on this Note (as such Notes may be amended, modified, supplemented or waived, as provided in the Indenture) at the times, place and rate, and in
the coin or currency, herein prescribed. 
 12. THIS NOTE SHALL BE GOVERNED BY, AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE
OF NEW YORK, UNITED STATES OF AMERICA. 

  
 R-10 













 ABBREVIATIONS 

The following abbreviations, when used in the inscription on the face of this instrument, shall be construed as though they were written out
in full according to applicable laws or regulations: 
  

							
	TEN COM -    	 	 as tenants
 in common
	 		  	 UNIF GIFT
 MIN ACT -
             Custodian             

                    (Cust)     
                (Minor)

	TEN ENT -	 	 as tenants by
 the entireties
	 	 

        
	  	  

                    Under Uniform Gifts

                    to Minors Act

	  
 JT TEN -
	 	  
 as joint tenants with

right of survivorship and
 not as tenants in common
	 		  	  

		 		 		  	State

 Additional abbreviations may also be used though not in the above list. 

FOR VALUE RECEIVED the undersigned hereby sell(s), 

assign(s) and transfer(s) unto 
 PLEASE INSERT
SOCIAL SECURITY OR OTHER 
 IDENTIFYING NUMBER OF ASSIGNEE 
  

 
 Please print or typewrite name and
address 
 including postal zip code of assignee 
  

 
 the within note and all rights thereunder, 

hereby irrevocably constituting and appointing 

___________________________________________________ attorney to transfer said note on the books of Petróleos Mexicanos, with full power of substitution
in the premises. 
 Dated: _________________ 

 
 NOTICE: The signature to this assignment
must correspond with the name as written upon the face of the within instrument in every particular, without alteration or enlargement or any change whatever. 

  
 R-11