Exhibit 4.2

PFIZER INC.

and

THE BANK OF NEW YORK MELLON,

Trustee

FOURTH SUPPLEMENTAL INDENTURE

Dated as of May 28, 2020

to

INDENTURE

Dated as of September 7, 2018

0.800% Notes due 2025

1.700% Notes due 2030

2.550% Notes due 2040

2.700% Notes due 2050

TABLE OF CONTENTS

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FOURTH SUPPLEMENTAL INDENTURE, dated as of May 28, 2020 (the “Fourth Supplemental Indenture”), between Pfizer Inc., a Delaware corporation (the “Company”), and The Bank of New York Mellon, a New York banking corporation, as trustee (the “Trustee”).

WHEREAS, the Company executed and delivered the indenture, dated as of September 7, 2018, to the Trustee (the “Indenture”), to provide for the issuance of the Company’s unsecured debentures, notes, bonds or other evidences of indebtedness (the “Securities”) in an unlimited aggregate principal amount to be issued from time to time in one or more series as provided therein;

WHEREAS, pursuant to Section 14.01 of the Indenture, the Company desires to provide for the issuance of (i) a new series of its Securities to be known as its 0.800% Notes due 2025 (the “2025 Notes”), (ii) a new series of its Securities to be known as its 1.700% Notes due 2030 (the “2030 Notes”), (iii) a new series of its Securities to be known as its 2.550% Notes due 2040 (the “2040 Notes”) and (iv) a new series of its Securities to be known as its 2.700% Notes due 2050 (the “2050 Notes” and, together with the 2025 Notes, the 2030 Notes and the 2040 Notes, the “Notes”), and to establish the forms and to set forth the terms of the Notes thereof, as provided in Section 3.01 of the Indenture;

WHEREAS, the Board of Directors of the Company, pursuant to resolutions duly adopted, has duly authorized the issuance of the Company’s debt securities and the Securities Issuance Committee of the Company, pursuant to a resolution duly adopted on May 18, 2020, has duly authorized the issuance of $750,000,000 aggregate principal amount of 2025 Notes, $1,000,000,000 aggregate principal amount of 2030 Notes, $1,000,000,000 aggregate principal amount of 2040 Notes and $1,250,000,000 aggregate principal amount of 2050 Notes, and has authorized the proper officers of the Company to execute any and all appropriate documents necessary or appropriate to effect such issuance;

WHEREAS, the Company has requested that the Trustee execute and deliver this Fourth Supplemental Indenture; and

WHEREAS, all things necessary to make this Fourth Supplemental Indenture a valid agreement of the Company, in accordance with its terms, and to make the Notes, when executed by the Company and authenticated and delivered by the Trustee, the valid obligations of the Company, have been done;

NOW THEREFORE, in consideration of the premises and the purchase and acceptance of the Notes by the Holders thereof, and for the purpose of setting forth, as provided in the Indenture, the forms and terms of the Notes, it is mutually covenanted and agreed, for the equal and proportionate benefit of all Holders of the Notes, as follows:

ARTICLE ONE

DEFINITIONS

Section 101.    Definition of Terms. Unless the context otherwise requires:

(a)    each term defined in the Indenture has the same meaning when used in this Fourth Supplemental Indenture;

(b)    each term defined anywhere in this Fourth Supplemental Indenture has the same meaning throughout;

(c)    the singular includes the plural and vice versa; and

(d)    headings are for convenience of reference only and do not affect interpretation.

ARTICLE TWO

GENERAL TERMS AND CONDITIONS OF THE 2025 NOTES

Section 201.    Designation and Principal Amount. There is hereby authorized and established a series of Securities under the Indenture, designated as the “0.800% Notes due 2025”, which is not limited in aggregate principal amount. The aggregate principal amount of the 2025 Notes to be issued on the date hereof is set forth in Article Eight herein.

Section 202.    Maturity. The Stated Maturity of principal of the 2025 Notes is May 28, 2025.

Section 203.    Further Issues. The Company may from time to time, without the consent of the Holders of the 2025 Notes, issue additional 2025 Notes. Any such additional 2025 Notes will have the same ranking, interest rate, maturity date and other terms as the 2025 Notes herein provided for. Any such additional 2025 Notes, together with the 2025 Notes herein provided for, will constitute a single series of Securities under the Indenture. No additional 2025 Notes may be issued if an Event of Default has occurred and is continuing with respect to the 2025 Notes. The Company will not issue any additional 2025 Notes intended to form a single series with the 2025 Notes herein provided for unless such additional 2025 Notes will be fungible with the 2025 Notes herein provided for U.S. federal income tax purposes.

Section 204.    Global Notes. Upon their original issuance, the 2025 Notes will be represented by one or more Global Securities registered in the name of Cede & Co., the nominee of The Depository Trust Company (“DTC”). The Company will deposit the Global Securities with DTC or its custodian and register the Global Securities in the name of Cede & Co.

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Section 205.    Interest. The 2025 Notes will bear interest (computed on the basis of a 360-day year consisting of twelve 30-day months) from May 28, 2020 at the rate of 0.800% per annum, payable semiannually in arrears; interest payable on each Interest Payment Date (as defined in the Indenture) will include interest accrued from May 28, 2020, or from the most recent Interest Payment Date to which interest has been paid or duly provided for; the Interest Payment Dates on which such interest shall be payable are May 28 and November 28, beginning on November 28, 2020; and the Record Date for the interest payable on any Interest Payment Date is the close of business on the May 13 or November 13 (whether or not a Business Day) immediately preceding the relevant Interest Payment Date. If any Interest Payment Date falls on a day that is not a Business Day, the required payment on that day will be due on the next succeeding Business Day as if made on the date the payment was due, and no interest will accrue on that payment for the period from and after that Interest Payment Date to the date of payment on the next succeeding Business Day.

Section 206.    Authorized Denominations. The 2025 Notes shall be issuable in denominations of $2,000 and integral multiples of $1,000 in excess thereof.

Section 207.    Redemption. The 2025 Notes are subject to redemption at the option of the Company as described in Article Six hereof.

Section 208.    Appointment of Agents. The Trustee will initially be the Registrar and Paying Agent for the 2025 Notes and will act as such only at its corporate trust offices in the Borough of Manhattan, City of New York.

ARTICLE THREE

GENERAL TERMS AND CONDITIONS OF THE 2030 NOTES

Section 301.    Designation and Principal Amount. There is hereby authorized and established a series of Securities under the Indenture, designated as the “1.700% Notes due 2030”, which is not limited in aggregate principal amount. The aggregate principal amount of the 2030 Notes to be issued on the date hereof is set forth in Article Eight herein.

Section 302.    Maturity. The Stated Maturity of principal of the 2030 Notes is May 28, 2030.

Section 303.    Further Issues. The Company may from time to time, without the consent of the Holders of the 2030 Notes, issue additional 2030 Notes. Any such additional 2030 Notes will have the same ranking, interest rate, maturity date and other terms as the 2030 Notes herein provided for. Any such additional 2030 Notes, together with the 2030 Notes herein provided for, will constitute a single series of Securities under the Indenture. No additional 2030 Notes may be issued if an Event of Default has occurred and is continuing with respect to the 2030 Notes. The Company will not issue any additional 2030 Notes intended to form a single series with the 2030 Notes herein provided for unless such additional 2030 Notes will be fungible with the 2030 Notes herein provided for U.S. federal income tax purposes.

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Section 304.    Global Notes. Upon their original issuance, the 2030 Notes will be represented by one or more Global Securities registered in the name of Cede & Co., the nominee of DTC. The Company will deposit the Global Securities with DTC or its custodian and register the Global Securities in the name of Cede & Co.

Section 305.    Interest. The 2030 Notes will bear interest (computed on the basis of a 360-day year consisting of twelve 30-day months) from May 28, 2020 at the rate of 1.700% per annum, payable semiannually in arrears; interest payable on each Interest Payment Date (as defined in the Indenture) will include interest accrued from May 28, 2020, or from the most recent Interest Payment Date to which interest has been paid or duly provided for; the Interest Payment Dates on which such interest shall be payable are May 28 and November 28, beginning on November 28, 2020; and the Record Date for the interest payable on any Interest Payment Date is the close of business on the May 13 or November 13 (whether or not a Business Day) immediately preceding the relevant Interest Payment Date. If any Interest Payment Date falls on a day that is not a Business Day, the required payment on that day will be due on the next succeeding Business Day as if made on the date the payment was due, and no interest will accrue on that payment for the period from and after that Interest Payment Date to the date of payment on the next succeeding Business Day.

Section 306.    Authorized Denominations. The 2030 Notes shall be issuable in denominations of $2,000 and integral multiples of $1,000 in excess thereof.

Section 307.    Redemption. The 2030 Notes are subject to redemption at the option of the Company as described in Article Six hereof.

Section 308.    Appointment of Agents. The Trustee will initially be the Registrar and Paying Agent for the 2030 Notes and will act as such only at its corporate trust offices in the Borough of Manhattan, City of New York.

ARTICLE FOUR

GENERAL TERMS AND CONDITIONS OF THE 2040 NOTES

Section 401.    Designation and Principal Amount. There is hereby authorized and established a series of Securities under the Indenture, designated as the “2.550% Notes due 2040”, which is not limited in aggregate principal amount. The aggregate principal amount of the 2040 Notes to be issued on the date hereof is set forth in Article Eight herein.

Section 402.    Maturity. The Stated Maturity of principal of the 2040 Notes is May 28, 2040.

Section 403.    Further Issues. The Company may from time to time, without the consent of the Holders of the 2040 Notes, issue additional 2040 Notes. Any

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such additional 2040 Notes will have the same ranking, interest rate, maturity date and other terms as the 2040 Notes herein provided for. Any such additional 2040 Notes, together with the 2040 Notes herein provided for, will constitute a single series of Securities under the Indenture. No additional 2040 Notes may be issued if an Event of Default has occurred and is continuing with respect to the 2040 Notes. The Company will not issue any additional 2040 Notes intended to form a single series with the 2040 Notes herein provided for unless such additional 2040 Notes will be fungible with the 2040 Notes herein provided for U.S. federal income tax purposes.

Section 404.    Global Notes. Upon their original issuance, the 2040 Notes will be represented by one or more Global Securities registered in the name of Cede & Co., the nominee of DTC. The Company will deposit the Global Securities with DTC or its custodian and register the Global Securities in the name of Cede & Co.

Section 405.    Interest. The 2040 Notes will bear interest (computed on the basis of a 360-day year consisting of twelve 30-day months) from May 28, 2020 at the rate of 2.550% per annum, payable semiannually in arrears; interest payable on each Interest Payment Date (as defined in the Indenture) will include interest accrued from May 28, 2020, or from the most recent Interest Payment Date to which interest has been paid or duly provided for; the Interest Payment Dates on which such interest shall be payable are May 28 and November 28, beginning on November 28, 2020; and the Record Date for the interest payable on any Interest Payment Date is the close of business on the May 13 or November 13 (whether or not a Business Day) immediately preceding the relevant Interest Payment Date. If any Interest Payment Date falls on a day that is not a Business Day, the required payment on that day will be due on the next succeeding Business Day as if made on the date the payment was due, and no interest will accrue on that payment for the period from and after that Interest Payment Date to the date of payment on the next succeeding Business Day.

Section 406.    Authorized Denominations. The 2040 Notes shall be issuable in denominations of $2,000 and integral multiples of $1,000 in excess thereof.

Section 407.    Redemption. The 2040 Notes are subject to redemption at the option of the Company as described in Article Six hereof.

Section 408.    Appointment of Agents. The Trustee will initially be the Registrar and Paying Agent for the 2040 Notes and will act as such only at its corporate trust offices in the Borough of Manhattan, City of New York.

ARTICLE FIVE

GENERAL TERMS AND CONDITIONS OF THE 2050 NOTES

Section 501.    Designation and Principal Amount. There is hereby authorized and established a series of Securities under the Indenture, designated as the “2.700% Notes due 2050”, which is not limited in aggregate principal amount. The aggregate principal amount of the 2050 Notes to be issued on the date hereof is set forth in Article Eight herein.

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Section 502.    Maturity. The Stated Maturity of principal of the 2050 Notes is May 28, 2050.

Section 503.    Further Issues. The Company may from time to time, without the consent of the Holders of the 2050 Notes, issue additional 2050 Notes. Any such additional 2050 Notes will have the same ranking, interest rate, maturity date and other terms as the 2050 Notes herein provided for. Any such additional 2050 Notes, together with the 2050 Notes herein provided for, will constitute a single series of Securities under the Indenture. No additional 2050 Notes may be issued if an Event of Default has occurred and is continuing with respect to the 2050 Notes. The Company will not issue any additional 2050 Notes intended to form a single series with the 2050 Notes herein provided for unless such additional 2050 Notes will be fungible with the 2050 Notes herein provided for U.S. federal income tax purposes.

Section 504.    Global Notes. Upon their original issuance, the 2050 Notes will be represented by one or more Global Securities registered in the name of Cede & Co., the nominee of DTC. The Company will deposit the Global Securities with DTC or its custodian and register the Global Securities in the name of Cede & Co.

Section 505.    Interest. The 2050 Notes will bear interest (computed on the basis of a 360-day year consisting of twelve 30-day months) from May 28, 2020 at the rate of 2.700% per annum, payable semiannually in arrears; interest payable on each Interest Payment Date (as defined in the Indenture) will include interest accrued from May 28, 2020, or from the most recent Interest Payment Date to which interest has been paid or duly provided for; the Interest Payment Dates on which such interest shall be payable are May 28 and November 28, beginning on November 28, 2020; and the Record Date for the interest payable on any Interest Payment Date is the close of business on the May 13 or November 13 (whether or not a Business Day) immediately preceding the relevant Interest Payment Date. If any Interest Payment Date falls on a day that is not a Business Day, the required payment on that day will be due on the next succeeding Business Day as if made on the date the payment was due, and no interest will accrue on that payment for the period from and after that Interest Payment Date to the date of payment on the next succeeding Business Day.

Section 506.    Authorized Denominations. The 2050 Notes shall be issuable in denominations of $2,000 and integral multiples of $1,000 in excess thereof.

Section 507.    Redemption. The 2050 Notes are subject to redemption at the option of the Company as described in Article Six hereof.

Section 508.    Appointment of Agents. The Trustee will initially be the Registrar and Paying Agent for the 2050 Notes and will act as such only at its corporate trust offices in the Borough of Manhattan, City of New York.

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ARTICLE SIX

OPTIONAL REDEMPTION; NO SINKING FUND

Section 601.    Optional Redemption by Company.

(a)    At the Company’s option, the 2025 Notes may be redeemed, in whole, at any time, or in part, from time to time, prior to April 28, 2025 (one month prior to the Stated Maturity of the 2025 Notes (the “2025 Par Call Date,” and the date of any such redemption a “2025 Redemption Date”)) at a redemption price to be calculated on the basis of a 360-day year consisting of twelve 30-day months (the “2025 Redemption Price”) equal to the greater of the following amounts:

(i)    100% of the principal amount of the 2025 Notes being redeemed on the relevant 2025 Redemption Date, and

(ii)    the sum of the present values of the remaining scheduled payments (through the 2025 Par Call Date assuming for such purpose that the 2025 Notes being redeemed matured on the 2025 Par Call Date) of principal and interest on the 2025 Notes being redeemed on the applicable 2025 Redemption Date (not including the amount, if any, of accrued and unpaid interest to, but excluding, such 2025 Redemption Date) discounted to such 2025 Redemption Date on a semi-annual basis at the Treasury Rate, as determined by the Independent Investment Banker, plus 10 basis points;

plus, in each of the cases of (a)(i) and (a)(ii) above, accrued and unpaid interest on the 2025 Notes being redeemed to, but excluding, such 2025 Redemption Date.

(b)    At the Company’s option, the 2030 Notes may be redeemed, in whole, at any time, or in part, from time to time, prior to February 28, 2030 (three months prior to the Stated Maturity of the 2030 Notes (the “2030 Par Call Date,” and the date of any such redemption a “2030 Redemption Date”)) at a redemption price to be calculated on the basis of a 360-day year consisting of twelve 30-day months (the “2030 Redemption Price”) equal to the greater of the following amounts:

(i)    100% of the principal amount of the 2030 Notes being redeemed on the relevant 2030 Redemption Date, and

(ii)    the sum of the present values of the remaining scheduled payments (through the 2030 Par Call Date assuming for such purpose that the 2030 Notes being redeemed matured on the 2030 Par Call Date) of principal and interest on the 2030 Notes being redeemed on the applicable 2030 Redemption Date (not including the amount, if any, of accrued and unpaid interest to, but excluding, such 2030 Redemption Date) discounted to such 2030 Redemption Date on a semi-annual basis at the Treasury Rate, as determined by the Independent Investment Banker, plus 15 basis points;

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plus, in each of the cases of (b)(i) and (b)(ii) above, accrued and unpaid interest on the 2030 Notes being redeemed to, but excluding, such 2030 Redemption Date.

(c)    At the Company’s option, the 2040 Notes may be redeemed, in whole, at any time, or in part, from time to time, prior to November 28, 2039 (six months prior to the Stated Maturity of the 2040 Notes (the “2040 Par Call Date,” and the date of any such redemption a “2040 Redemption Date”)) at a redemption price to be calculated on the basis of a 360-day year consisting of twelve 30-day months (the “2040 Redemption Price”) equal to the greater of the following amounts:

(i)    100% of the principal amount of the 2040 Notes being redeemed on the relevant 2040 Redemption Date, and

(ii)    the sum of the present values of the remaining scheduled payments (through the 2040 Par Call Date assuming for such purpose that the 2040 Notes being redeemed matured on the 2040 Par Call Date) of principal and interest on the 2040 Notes being redeemed on the applicable 2040 Redemption Date (not including the amount, if any, of accrued and unpaid interest to, but excluding, such 2040 Redemption Date) discounted to such 2040 Redemption Date on a semi-annual basis at the Treasury Rate, as determined by the Independent Investment Banker, plus 20 basis points;

plus, in each of the cases of (c)(i) and (c)(ii) above, accrued and unpaid interest on the 2040 Notes being redeemed to, but excluding, such 2040 Redemption Date.

(d)    At the Company’s option, the 2050 Notes may be redeemed, in whole, at any time, or in part, from time to time, prior to November 28, 2049 (six months prior to the Stated Maturity of the 2050 Notes (the “2050 Par Call Date,” and the date of any such redemption a “2050 Redemption Date”)) at a redemption price to be calculated on the basis of a 360-day year consisting of twelve 30-day months (the “2050 Redemption Price”) equal to the greater of the following amounts:

(i)    100% of the principal amount of the 2050 Notes being redeemed on the relevant 2050 Redemption Date, and

(ii)    the sum of the present values of the remaining scheduled payments (through the 2050 Par Call Date assuming for such purpose that the 2050 Notes being redeemed matured on the 2050 Par Call Date) of principal and interest on the 2050 Notes being redeemed on the applicable 2050 Redemption Date (not including the amount, if any, of accrued and unpaid interest to, but excluding, such 2050 Redemption Date) discounted to such 2050 Redemption Date on a semi-annual basis at the Treasury Rate, as determined by the Independent Investment Banker, plus 20 basis points;

plus, in each of the cases of (d)(i) and (d)(ii) above, accrued and unpaid interest on the 2050 Notes being redeemed to, but excluding, such 2050 Redemption Date.

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(e)    Notice of any redemption of the Notes of any series shall be given in the manner and otherwise in accordance with the provisions of Section 4.03 of the Indenture. If the Company has given notice of redemption as provided in the Indenture and funds for the redemption of the Notes called for redemption have been made available on the Redemption Date referred to in that notice, such Notes will cease to bear interest on such Redemption Date (unless the Company defaults in the payment of the applicable Redemption Price and accrued and unpaid interest). Any interest accrued to such Redemption Date will be paid as specified in such notice.

(f)    The following defined terms used in this Article Six shall, unless the context otherwise requires, have the meanings specified below.

“Comparable Treasury Issue” means the United States Treasury security selected by the Independent Investment Banker as having a maturity comparable to the remaining term of the applicable Notes to be redeemed (assuming that the notes to be redeemed matured on the 2025 Par Call Date with respect to the 2025 Notes, on the 2030 Par Call Date with respect to the 2030 Notes, on the 2040 Par Call Date with respect to the 2040 Notes and on the 2050 Par Call Date with respect to the 2050 Notes) 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 such Notes.

“Comparable Treasury Price” means (A) the average of the Reference Treasury Dealer Quotations for the applicable Redemption Date and the applicable Notes to be redeemed, after excluding the highest and lowest of such Reference Treasury Dealer Quotations, or (B) if the Independent Investment Banker obtains fewer than four such Reference Treasury Dealer Quotations, the average of such Reference Treasury Dealer Quotations, or (C) if only one Reference Treasury Dealer Quotation is received, such Reference Treasury Dealer Quotation.

“Independent Investment Banker” means one of the Reference Treasury Dealers appointed by the Company to act as the “Independent Investment Banker.”

“Reference Treasury Dealer” means each of Barclays Capital Inc., Citigroup Global Markets Inc., Deutsche Bank Securities Inc. and J.P. Morgan Securities LLC (or their respective affiliates that are Primary Treasury Dealers), and their respective successors; provided, however, that if any of the foregoing shall cease to be a primary U.S. Government securities dealer in the United States (a “Primary Treasury Dealer”), the Company will substitute therefor another Primary Treasury Dealer.

“Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury Dealer and any Redemption Date and Notes to be redeemed, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue for such Notes (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. (New York City time) on the third Business Day preceding such Redemption Date.

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“Treasury Rate” means the rate per annum equal to the semi-annual equivalent yield to maturity of the applicable Comparable Treasury Issue, assuming a price for such Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the applicable Comparable Treasury Price for the applicable Redemption Date.

(g)    In connection with any such redemption, each Reference Treasury Dealer shall deliver the Comparable Treasury Price to the Company and the Independent Investment Banker in writing two Business Days prior to the Redemption Date. At or prior to the time of giving of any notice of redemption to the Holders of any Notes to be redeemed, the Company shall deliver an Officers’ Certificate to the Trustee setting forth the calculation of the Redemption Price or the manner in which the Redemption Price shall be calculated, as relevant, applicable to such redemption. The Trustee shall be under no duty to inquire into, may conclusively presume the correctness of, and shall be fully protected in relying upon, the applicable Redemption Price as so calculated, or the manner in which such Redemption Price shall be calculated, as relevant, and set forth in such Officers’ Certificate.

Section 602.    Par Calls. Any time on or after the 2025 Par Call Date with respect to the 2025 Notes, the 2030 Par Call Date with respect to the 2030 Notes, the 2040 Par Call Date with respect to the 2040 Notes or the 2050 Par Call Date with respect to the 2050 Notes, the Company may redeem the applicable series of Notes, in whole or in part, at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus in each case, accrued and unpaid interest on the Notes being redeemed to, but excluding, such Redemption Date.

Section 603.    No Sinking Fund. None of the Notes are entitled to the benefit of any sinking fund.

ARTICLE SEVEN

FORMS OF NOTES

Section 701.    Form of 2025 Note. The 2025 Notes and the Trustee’s Certificate of Authentication to be endorsed thereon are to be substantially in the forms set forth in Exhibit A hereto.

Section 702.    Form of 2030 Note. The 2030 Notes and the Trustee’s Certificate of Authentication to be endorsed thereon are to be substantially in the forms set forth in Exhibit B hereto.

Section 703.    Form of 2040 Note. The 2040 Notes and the Trustee’s Certificate of Authentication to be endorsed thereon are to be substantially in the forms set forth in Exhibit C hereto.

Section 704.    Form of 2050 Note. The 2050 Notes and the Trustee’s Certificate of Authentication to be endorsed thereon are to be substantially in the forms set forth in Exhibit D hereto.

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ARTICLE EIGHT

ORIGINAL ISSUE AMOUNT OF NOTES

Section 801.    Original Issue Amount of the 2025 Notes. 2025 Notes in the aggregate principal amount of $750,000,000 may, upon execution of this Fourth Supplemental Indenture, be executed by the Company and delivered to the Trustee for authentication, and the Trustee shall, upon receipt of a Company Order, authenticate and deliver said 2025 Notes as provided in said Company Order.

Section 802.    Original Issue Amount of the 2030 Notes. 2030 Notes in the aggregate principal amount of $1,000,000,000 may, upon execution of this Fourth Supplemental Indenture, be executed by the Company and delivered to the Trustee for authentication, and the Trustee shall, upon receipt of a Company Order, authenticate and deliver said 2030 Notes as provided in said Company Order.

Section 803.    Original Issue Amount of the 2040 Notes. 2040 Notes in the aggregate principal amount of $1,000,000,000 may, upon execution of this Fourth Supplemental Indenture, be executed by the Company and delivered to the Trustee for authentication, and the Trustee shall, upon receipt of a Company Order, authenticate and deliver said 2040 Notes as provided in said Company Order.

Section 804.    Original Issue Amount of the 2050 Notes. 2050 Notes in the aggregate principal amount of $1,250,000,000 may, upon execution of this Fourth Supplemental Indenture, be executed by the Company and delivered to the Trustee for authentication, and the Trustee shall, upon receipt of a Company Order, authenticate and deliver said 2050 Notes as provided in said Company Order.

ARTICLE NINE

MISCELLANEOUS

Section 901.    Ratification of Indenture. The Indenture, as supplemented by this Fourth Supplemental Indenture, is in all respects ratified and confirmed, and this Fourth Supplemental Indenture shall be deemed part of the Indenture in the manner and to the extent herein and therein provided.

Section 902.    Trustee Not Responsible for Recitals. The recitals and statements herein contained are made by the Company and not by the Trustee, and the Trustee assumes no responsibility for the correctness thereof. The Trustee makes no representation as to the validity or sufficiency of this Fourth Supplemental Indenture.

Section 903.    Governing Law. This Fourth Supplemental Indenture and each Note shall be governed by and construed in accordance with the laws of the State of New York.

Section 904.    Separability. In case any one or more of the provisions contained in this Fourth Supplemental Indenture or in the Notes shall for any reason be

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held to be invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect any other provisions of this Fourth Supplemental Indenture or of the Notes, but this Fourth Supplemental Indenture and the Notes shall be construed as if such invalid or illegal or unenforceable provision had never been contained herein or therein.

Section 905.    Counterparts. This Fourth Supplemental Indenture, and each of the other documents executed on the date hereof in connection with this Fourth Supplemental Indenture and the authentication and delivery of the Notes, may be executed in any number of counterparts each of which shall be an original; but such counterparts shall together constitute but one and the same instrument. The exchange of copies of this Fourth Supplemental Indenture, such other documents and of signature pages by facsimile or electronic format (i.e., “pdf” or “tif”) transmission shall constitute effective execution and delivery of this Fourth Supplemental Indenture and such other documents as to the parties hereto and may be used in lieu of the original Fourth Supplemental Indenture and such other documents for all purposes. Signatures of the parties hereto transmitted by facsimile or electronic format (i.e., “pdf” or “tif”) shall be deemed to be their original signatures for all purposes.

Section 906.    Trust Indenture Act. This Fourth Supplemental Indenture is subject to the provisions of the Trust Indenture Act that are required to be part of the Indenture and shall, to the extent applicable, be governed by such provisions. If any provision in this Fourth Supplemental Indenture limits, qualifies or conflicts with another provision of hereof which is required to be included herein by any provisions of the Trust Indenture Act, such required provision shall control.

Section 907.    Signatures. The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Fourth Supplemental Indenture or any document to be signed in connection with this Fourth Supplemental Indenture shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, to the extent and as provided for in any applicable law, including the federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act, or any other state laws based on the Uniform Electronic Transactions Act, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

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IN WITNESS WHEREOF, the parties hereto have caused this Fourth Supplemental Indenture to be duly executed, all as of the day and year first above written.

EXHIBIT A

FORM OF 2025 NOTE

THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

CUSIP No. 717081 EX7

Pfizer Inc.

0.800% NOTES DUE 2025

Interest. Pfizer Inc., a Delaware corporation (herein called the “Company”, which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co. or registered assigns, the principal sum of [●] DOLLARS ($[●]), as revised by the Schedule of Increases or Decreases in Global Security attached hereto, on May 28, 2025 and to pay interest thereon from May 28, 2020 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on May 28 and November 28 in each year, commencing November 28, 2020, at the rate of 0.800% per annum, until the principal hereof is paid or made available for payment.

Method of Payment. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Record Date for such interest, which shall be the May 13 or November 13 immediately preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Record Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) 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 thereof having been given to Holders of Securities of this series 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 Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place.

Authentication. Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature of one of its authorized signatories, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

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IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its corporate seal.

[Reverse of Security]

Indenture. This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be issued in one or more series under an Indenture, dated as of September 7, 2018, as supplemented by a Fourth Supplemental Indenture, dated as of May 28, 2020 (as so supplemented, herein called the “Indenture”), between the Company and The Bank of New York Mellon (herein called the “Trustee”, which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face hereof, initially limited in aggregate principal amount to $750,000,000.

Optional Redemption. At the Company’s option, the Securities of this series may be redeemed in whole, at any time or in part, from time to time prior to April 28, 2025 (one month prior to the Stated Maturity of the Securities (the “Par Call Date,” and the date of any such redemption a “Redemption Date”)). The redemption price (the “Redemption Price”) of the Securities will be equal to the greater of the following amounts:

(a)    100% of the principal amount of the Securities being redeemed on the applicable Redemption Date, and

(b)    the sum of the present value of the remaining scheduled payments (through the Par Call Date assuming for such purpose that the Securities being redeemed matured on the Par Call Date) of principal and interest on the Securities being redeemed on such Redemption Date (not including the amount, if any, of accrued and unpaid interest to, but excluding, such Redemption Date) discounted to such Redemption Date on a semi-annual basis at the Treasury Rate (as defined below), as determined by the Independent Investment Banker (as defined below), plus 10 basis points;

plus, in each case, accrued and unpaid interest on the Securities being redeemed to, but excluding, such Redemption Date.

Any time on or after the Par Call Date, the Company may redeem the Securities, in whole or in part, at a Redemption Price equal to 100% of the principal amount of the Securities to be redeemed, plus accrued and unpaid interest on the Securities being redeemed to, but excluding, the Redemption Date.

The Redemption Price will be calculated on the basis of a 360-day year consisting of twelve 30-day months. Once notice of redemption is mailed by the Company, the Securities called for redemption will become due and payable on the applicable Redemption Date at the applicable Redemption Price.

For purposes of determining the Redemption Price, the following definitions are applicable:

“Comparable Treasury Issue” means the United States Treasury security selected by the Independent Investment Banker as having a maturity comparable to the remaining term of the applicable Securities to be redeemed (assuming that the Securities to be redeemed 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 such Securities.

“Comparable Treasury Price” means (A) the average of the Reference Treasury Dealer Quotations for the applicable Redemption Date and applicable Securities to be redeemed, after excluding the highest and lowest of such Reference Treasury Dealer Quotations, or (B) if the Independent Investment Banker obtains fewer than four such Reference Treasury Dealer Quotations, the average of such Reference Treasury Dealer Quotations, or (C) if only one Reference Treasury Dealer Quotation is received, such Reference Treasury Dealer Quotation.

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“Independent Investment Banker” means one of the Reference Treasury Dealers appointed by the Company to act as the “Independent Investment Banker.”

“Reference Treasury Dealer” means each of Barclays Capital Inc., Citigroup Global Markets Inc., Deutsche Bank Securities Inc. and J.P. Morgan Securities LLC (or their respective affiliates that are Primary Treasury Dealers), and their respective successors; provided, however, that if any of the foregoing shall cease to be a primary U.S. Government securities dealer in the United States (a “Primary Treasury Dealer”), the Company will substitute therefor another Primary Treasury Dealer.

“Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury Dealer and any Redemption Date and Securities to be redeemed, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue for such Securities (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. (New York City time) on the third Business Day preceding such Redemption Date.

“Treasury Rate” means the rate per annum equal to the semi-annual equivalent yield to maturity of the applicable Comparable Treasury Issue, assuming a price for such Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the applicable Comparable Treasury Price for the applicable Redemption Date.

Notice of any redemption will be mailed at least 10 days but not more than 60 days before the Redemption Date to each registered Holder of the Securities to be redeemed. Unless the Company defaults in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Securities or portions of the Securities called for redemption. If fewer than all of the Securities are to be redeemed, the Trustee will select pro rata, by lot or by such other method as the Trustee shall deem fair and appropriate, the particular Securities or portions thereof for redemption from the outstanding Securities not previously called.

Except as set forth above, the Securities will not be redeemable by the Company prior to maturity and will not be entitled to the benefit of any sinking fund.

Defaults and Remedies. If an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

Amendment, Modification and Waiver. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in principal amount of all series at the time Outstanding affected thereby (voting as one class). The Indenture contains provisions permitting the Holders of not less than a majority in principal amount of the Outstanding Securities of all series, with respect to which any default under the Indenture shall have occurred and be continuing (voting as one class), on behalf of the Holders of all the Outstanding Securities of such series, to waive, with certain exceptions, such past default with respect to such series and its consequences. The Indenture also permits the Holders of not less than a majority in principal amount of the Outstanding Securities of any series, on behalf of the Holders of all Outstanding Securities of such series, to waive compliance by the Company with certain provisions of the Indenture. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange therefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security.

Restrictive Covenants. The Indenture does not limit unsecured debt of the Company or any of its Subsidiaries.

Denominations, Transfer and Exchange. The Securities of this series are issuable only in registered form without coupons in denominations of $2,000 and in integral multiples of $1,000 in excess

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thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registerable in the Security Register, upon surrender of this Security for registration of transfer at the Registrar accompanied by a written request for transfer in form satisfactory to the Company and the Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this series and of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Persons Deemed Owners. Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

Miscellaneous. The Indenture and this Security shall be governed by and construed in accordance with the law of the State of New York.

All terms used in this Security and not defined herein shall have the meanings assigned to them in the Indenture.

The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Security or any document to be signed in connection with this Security shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, to the extent and as provided for in any applicable law, including the federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act, or any other state laws based on the Uniform Electronic Transactions Act, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

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EXHIBIT B

FORM OF 2030 NOTE

THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

CUSIP No. 717081 EY5

Pfizer Inc.

1.700% NOTES DUE 2030

Interest. Pfizer Inc., a Delaware corporation (herein called the “Company”, which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co. or registered assigns, the principal sum of [●] DOLLARS ($[●]), as revised by the Schedule of Increases or Decreases in Global Security attached hereto, on May 28, 2030 and to pay interest thereon from May 28, 2020 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on May 28 and November 28 in each year, commencing November 28, 2020, at the rate of 1.700% per annum, until the principal hereof is paid or made available for payment.

Method of Payment. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Record Date for such interest, which shall be the May 13 or November 13 immediately preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Record Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) 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 thereof having been given to Holders of Securities of this series 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 Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place.

Authentication. Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature of one of its authorized signatories, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

B-1

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its corporate seal.

[Reverse of Security]

Indenture. This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be issued in one or more series under an Indenture, dated as of September 7, 2018, as supplemented by a Fourth Supplemental Indenture, dated as of May 28, 2020 (as so supplemented, herein called the “Indenture”), between the Company and The Bank of New York Mellon (herein called the “Trustee”, which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face hereof, initially limited in aggregate principal amount to $1,000,000,000.

Optional Redemption. At the Company’s option, the Securities of this series may be redeemed in whole, at any time or in part, from time to time prior to February 28, 2030 (three months prior to the Stated Maturity of the Securities (the “Par Call Date,” and the date of any such redemption a “Redemption Date”)). The redemption price (the “Redemption Price”) of the Securities will be equal to the greater of the following amounts:

(a)    100% of the principal amount of the Securities being redeemed on the applicable Redemption Date, and

(b)    the sum of the present value of the remaining scheduled payments (through the Par Call Date assuming for such purpose that the Securities being redeemed matured on the Par Call Date) of principal and interest on the Securities being redeemed on such Redemption Date (not including the amount, if any, of accrued and unpaid interest to, but excluding, such Redemption Date) discounted to such Redemption Date on a semi-annual basis at the Treasury Rate (as defined below), as determined by the Independent Investment Banker (as defined below), plus 15 basis points;

plus, in each case, accrued and unpaid interest on the Securities being redeemed to, but excluding, such Redemption Date.

Any time on or after the Par Call Date, the Company may redeem the Securities, in whole or in part, at a Redemption Price equal to 100% of the principal amount of the Securities to be redeemed, plus accrued and unpaid interest on the Securities being redeemed to, but excluding, the Redemption Date.

The Redemption Price will be calculated on the basis of a 360-day year consisting of twelve 30-day months. Once notice of redemption is mailed by the Company, the Securities called for redemption will become due and payable on the applicable Redemption Date at the applicable Redemption Price.

For purposes of determining the Redemption Price, the following definitions are applicable:

“Comparable Treasury Issue” means the United States Treasury security selected by the Independent Investment Banker as having a maturity comparable to the remaining term of the applicable Securities to be redeemed (assuming that the Securities to be redeemed 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 such Securities.

“Comparable Treasury Price” means (A) the average of the Reference Treasury Dealer Quotations for the applicable Redemption Date and applicable Securities to be redeemed, after excluding the highest and lowest of such Reference Treasury Dealer Quotations, or (B) if the Independent Investment Banker obtains fewer than four such Reference Treasury Dealer Quotations, the average of such Reference Treasury Dealer Quotations, or (C) if only one Reference Treasury Dealer Quotation is received, such Reference Treasury Dealer Quotation.

B-3

“Independent Investment Banker” means one of the Reference Treasury Dealers appointed by the Company to act as the “Independent Investment Banker.”

“Reference Treasury Dealer” means each of Barclays Capital Inc., Citigroup Global Markets Inc., Deutsche Bank Securities Inc. and J.P. Morgan Securities LLC (or their respective affiliates that are Primary Treasury Dealers), and their respective successors; provided, however, that if any of the foregoing shall cease to be a primary U.S. Government securities dealer in the United States (a “Primary Treasury Dealer”), the Company will substitute therefor another Primary Treasury Dealer.

“Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury Dealer and any Redemption Date and Securities to be redeemed, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue for such Securities (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. (New York City time) on the third Business Day preceding such Redemption Date.

“Treasury Rate” means the rate per annum equal to the semi-annual equivalent yield to maturity of the applicable Comparable Treasury Issue, assuming a price for such Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the applicable Comparable Treasury Price for the applicable Redemption Date.

Notice of any redemption will be mailed at least 10 days but not more than 60 days before the Redemption Date to each registered Holder of the Securities to be redeemed. Unless the Company defaults in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Securities or portions of the Securities called for redemption. If fewer than all of the Securities are to be redeemed, the Trustee will select pro rata, by lot or by such other method as the Trustee shall deem fair and appropriate, the particular Securities or portions thereof for redemption from the outstanding Securities not previously called.

Except as set forth above, the Securities will not be redeemable by the Company prior to maturity and will not be entitled to the benefit of any sinking fund.

Defaults and Remedies. If an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

Amendment, Modification and Waiver. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in principal amount of all series at the time Outstanding affected thereby (voting as one class). The Indenture contains provisions permitting the Holders of not less than a majority in principal amount of the Outstanding Securities of all series, with respect to which any default under the Indenture shall have occurred and be continuing (voting as one class), on behalf of the Holders of all the Outstanding Securities of such series, to waive, with certain exceptions, such past default with respect to such series and its consequences. The Indenture also permits the Holders of not less than a majority in principal amount of the Outstanding Securities of any series, on behalf of the Holders of all Outstanding Securities of such series, to waive compliance by the Company with certain provisions of the Indenture. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange therefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security.

Restrictive Covenants. The Indenture does not limit unsecured debt of the Company or any of its Subsidiaries.

Denominations, Transfer and Exchange. The Securities of this series are issuable only in registered form without coupons in denominations of $2,000 and in integral multiples of $1,000 in excess

B-4

thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registerable in the Security Register, upon surrender of this Security for registration of transfer at the Registrar accompanied by a written request for transfer in form satisfactory to the Company and the Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this series and of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Persons Deemed Owners. Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

Miscellaneous. The Indenture and this Security shall be governed by and construed in accordance with the law of the State of New York.

All terms used in this Security and not defined herein shall have the meanings assigned to them in the Indenture.

The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Security or any document to be signed in connection with this Security shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, to the extent and as provided for in any applicable law, including the federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act, or any other state laws based on the Uniform Electronic Transactions Act, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

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EXHIBIT C

FORM OF 2040 NOTE

THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

CUSIP No. 717081 EZ2

Pfizer Inc.

2.550 % NOTES DUE 2040

Interest. Pfizer Inc., a Delaware corporation (herein called the “Company”, which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co. or registered assigns, the principal sum of [●] DOLLARS ($[●]), as revised by the Schedule of Increases or Decreases in Global Security attached hereto, on May 28, 2040 and to pay interest thereon from May 28, 2020 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on May 28 and November 28 in each year, commencing November 28, 2020, at the rate of 2.550% per annum, until the principal hereof is paid or made available for payment.

Method of Payment. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Record Date for such interest, which shall be the May 13 or November 13 immediately preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Record Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) 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 thereof having been given to Holders of Securities of this series 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 Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place.

Authentication. Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature of one of its authorized signatories, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

C-1

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its corporate seal.

[Reverse of Security]

Indenture. This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be issued in one or more series under an Indenture, dated as of September 7, 2018, as supplemented by a Fourth Supplemental Indenture, dated as of May 28, 2020 (as so supplemented, herein called the “Indenture”), between the Company and The Bank of New York Mellon (herein called the “Trustee”, which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face hereof, initially limited in aggregate principal amount to $1,000,000,000.

Optional Redemption. At the Company’s option, the Securities of this series may be redeemed in whole, at any time or in part, from time to time prior to November 28, 2039 (six months prior to the Stated Maturity of the Securities (the “Par Call Date,” and the date of any such redemption a “Redemption Date”)). The redemption price (the “Redemption Price”) of the Securities will be equal to the greater of the following amounts:

(a)    100% of the principal amount of the Securities being redeemed on the applicable Redemption Date, and

(b)    the sum of the present value of the remaining scheduled payments (through the Par Call Date assuming for such purpose that the Securities being redeemed matured on the Par Call Date) of principal and interest on the Securities being redeemed on such Redemption Date (not including the amount, if any, of accrued and unpaid interest to, but excluding, such Redemption Date) discounted to such Redemption Date on a semi-annual basis at the Treasury Rate (as defined below), as determined by the Independent Investment Banker (as defined below), plus 20 basis points;

plus, in each case, accrued and unpaid interest on the Securities being redeemed to, but excluding, such Redemption Date.

Any time on or after the Par Call Date, the Company may redeem the Securities, in whole or in part, at a Redemption Price equal to 100% of the principal amount of the Securities to be redeemed, plus accrued and unpaid interest on the Securities being redeemed to, but excluding, the Redemption Date.

The Redemption Price will be calculated on the basis of a 360-day year consisting of twelve 30-day months. Once notice of redemption is mailed by the Company, the Securities called for redemption will become due and payable on the applicable Redemption Date at the applicable Redemption Price.

For purposes of determining the Redemption Price, the following definitions are applicable:

“Comparable Treasury Issue” means the United States Treasury security selected by the Independent Investment Banker as having a maturity comparable to the remaining term of the applicable Securities to be redeemed (assuming that the Securities to be redeemed 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 such Securities.

“Comparable Treasury Price” means (A) the average of the Reference Treasury Dealer Quotations for the applicable Redemption Date and applicable Securities to be redeemed, after excluding the highest and lowest of such Reference Treasury Dealer Quotations, or (B) if the Independent Investment Banker obtains fewer than four such Reference Treasury Dealer Quotations, the average of such Reference Treasury Dealer Quotations, or (C) if only one Reference Treasury Dealer Quotation is received, such Reference Treasury Dealer Quotation.

C-3

“Independent Investment Banker” means one of the Reference Treasury Dealers appointed by the Company to act as the “Independent Investment Banker.”

“Reference Treasury Dealer” means each of Barclays Capital Inc., Citigroup Global Markets Inc., Deutsche Bank Securities Inc. and J.P. Morgan Securities LLC (or their respective affiliates that are Primary Treasury Dealers), and their respective successors; provided, however, that if any of the foregoing shall cease to be a primary U.S. Government securities dealer in the United States (a “Primary Treasury Dealer”), the Company will substitute therefor another Primary Treasury Dealer.

“Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury Dealer and any Redemption Date and Securities to be redeemed, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue for such Securities (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. (New York City time) on the third Business Day preceding such Redemption Date.

“Treasury Rate” means the rate per annum equal to the semi-annual equivalent yield to maturity of the applicable Comparable Treasury Issue, assuming a price for such Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the applicable Comparable Treasury Price for the applicable Redemption Date.

Notice of any redemption will be mailed at least 10 days but not more than 60 days before the Redemption Date to each registered Holder of the Securities to be redeemed. Unless the Company defaults in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Securities or portions of the Securities called for redemption. If fewer than all of the Securities are to be redeemed, the Trustee will select pro rata, by lot or by such other method as the Trustee shall deem fair and appropriate, the particular Securities or portions thereof for redemption from the outstanding Securities not previously called.

Except as set forth above, the Securities will not be redeemable by the Company prior to maturity and will not be entitled to the benefit of any sinking fund.

Defaults and Remedies. If an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

Amendment, Modification and Waiver. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in principal amount of all series at the time Outstanding affected thereby (voting as one class). The Indenture contains provisions permitting the Holders of not less than a majority in principal amount of the Outstanding Securities of all series, with respect to which any default under the Indenture shall have occurred and be continuing (voting as one class), on behalf of the Holders of all the Outstanding Securities of such series, to waive, with certain exceptions, such past default with respect to such series and its consequences. The Indenture also permits the Holders of not less than a majority in principal amount of the Outstanding Securities of any series, on behalf of the Holders of all Outstanding Securities of such series, to waive compliance by the Company with certain provisions of the Indenture. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange therefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security.

Restrictive Covenants. The Indenture does not limit unsecured debt of the Company or any of its Subsidiaries.

Denominations, Transfer and Exchange. The Securities of this series are issuable only in registered form without coupons in denominations of $2,000 and in integral multiples of $1,000 in excess

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thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registerable in the Security Register, upon surrender of this Security for registration of transfer at the Registrar accompanied by a written request for transfer in form satisfactory to the Company and the Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this series and of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Persons Deemed Owners. Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

Miscellaneous. The Indenture and this Security shall be governed by and construed in accordance with the law of the State of New York.

All terms used in this Security and not defined herein shall have the meanings assigned to them in the Indenture.

The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Security or any document to be signed in connection with this Security shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, to the extent and as provided for in any applicable law, including the federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act, or any other state laws based on the Uniform Electronic Transactions Act, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

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EXHIBIT D

FORM OF 2050 NOTE

THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

CUSIP No. 717081 FA6

Pfizer Inc.

2.700% NOTES DUE 2050

Interest. Pfizer Inc., a Delaware corporation (herein called the “Company”, which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co. or registered assigns, the principal sum of [●] DOLLARS ($[●]), as revised by the Schedule of Increases or Decreases in Global Security attached hereto, on May 28, 2050 and to pay interest thereon from May 28, 2020 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on May 28 and November 28 in each year, commencing November 28, 2020, at the rate of 2.700% per annum, until the principal hereof is paid or made available for payment.

Method of Payment. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Record Date for such interest, which shall be the May 13 or November 13 immediately preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Record Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) 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 thereof having been given to Holders of Securities of this series 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 Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture.

Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place.

Authentication. Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature of one of its authorized signatories, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

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IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its corporate seal.

[Reverse of Security]

Indenture. This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be issued in one or more series under an Indenture, dated as of September 7, 2018, as supplemented by a Fourth Supplemental Indenture, dated as of May 28, 2020 (as so supplemented, herein called the “Indenture”), between the Company and The Bank of New York Mellon (herein called the “Trustee”, which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face hereof, initially limited in aggregate principal amount to $1,250,000,000.

Optional Redemption. At the Company’s option, the Securities of this series may be redeemed in whole, at any time or in part, from time to time prior to November 28, 2049 (six months prior to the Stated Maturity of the Securities (the “Par Call Date,” and the date of any such redemption a “Redemption Date”)). The redemption price (the “Redemption Price”) of the Securities will be equal to the greater of the following amounts:

(a)    100% of the principal amount of the Securities being redeemed on the applicable Redemption Date, and

(b)    the sum of the present value of the remaining scheduled payments (through the Par Call Date assuming for such purpose that the Securities being redeemed matured on the Par Call Date) of principal and interest on the Securities being redeemed on such Redemption Date (not including the amount, if any, of accrued and unpaid interest to, but excluding, such Redemption Date) discounted to such Redemption Date on a semi-annual basis at the Treasury Rate (as defined below), as determined by the Independent Investment Banker (as defined below), plus 20 basis points;

plus, in each case, accrued and unpaid interest on the Securities being redeemed to, but excluding, such Redemption Date.

Any time on or after the Par Call Date, the Company may redeem the Securities, in whole or in part, at a Redemption Price equal to 100% of the principal amount of the Securities to be redeemed, plus accrued and unpaid interest on the Securities being redeemed to, but excluding, the Redemption Date.

The Redemption Price will be calculated on the basis of a 360-day year consisting of twelve 30-day months. Once notice of redemption is mailed by the Company, the Securities called for redemption will become due and payable on the applicable Redemption Date at the applicable Redemption Price.

For purposes of determining the Redemption Price, the following definitions are applicable:

“Comparable Treasury Issue” means the United States Treasury security selected by the Independent Investment Banker as having a maturity comparable to the remaining term of the applicable Securities to be redeemed (assuming that the Securities to be redeemed 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 such Securities.

“Comparable Treasury Price” means (A) the average of the Reference Treasury Dealer Quotations for the applicable Redemption Date and applicable Securities to be redeemed, after excluding the highest and lowest of such Reference Treasury Dealer Quotations, or (B) if the Independent Investment Banker obtains fewer than four such Reference Treasury Dealer Quotations, the average of such Reference Treasury Dealer Quotations, or (C) if only one Reference Treasury Dealer Quotation is received, such Reference Treasury Dealer Quotation.

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“Independent Investment Banker” means one of the Reference Treasury Dealers appointed by the Company to act as the “Independent Investment Banker.”

“Reference Treasury Dealer” means each of Barclays Capital Inc., Citigroup Global Markets Inc., Deutsche Bank Securities Inc. and J.P. Morgan Securities LLC (or their respective affiliates that are Primary Treasury Dealers), and their respective successors; provided, however, that if any of the foregoing shall cease to be a primary U.S. Government securities dealer in the United States (a “Primary Treasury Dealer”), the Company will substitute therefor another Primary Treasury Dealer.

“Reference Treasury Dealer Quotation” means, with respect to each Reference Treasury Dealer and any Redemption Date and Securities to be redeemed, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue for such Securities (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. (New York City time) on the third Business Day preceding such Redemption Date.

“Treasury Rate” means the rate per annum equal to the semi-annual equivalent yield to maturity of the applicable Comparable Treasury Issue, assuming a price for such Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the applicable Comparable Treasury Price for the applicable Redemption Date.

Notice of any redemption will be mailed at least 10 days but not more than 60 days before the Redemption Date to each registered Holder of the Securities to be redeemed. Unless the Company defaults in payment of the Redemption Price, on and after the Redemption Date, interest will cease to accrue on the Securities or portions of the Securities called for redemption. If fewer than all of the Securities are to be redeemed, the Trustee will select pro rata, by lot or by such other method as the Trustee shall deem fair and appropriate, the particular Securities or portions thereof for redemption from the outstanding Securities not previously called.

Except as set forth above, the Securities will not be redeemable by the Company prior to maturity and will not be entitled to the benefit of any sinking fund.

Defaults and Remedies. If an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

Amendment, Modification and Waiver. The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in principal amount of all series at the time Outstanding affected thereby (voting as one class). The Indenture contains provisions permitting the Holders of not less than a majority in principal amount of the Outstanding Securities of all series, with respect to which any default under the Indenture shall have occurred and be continuing (voting as one class), on behalf of the Holders of all the Outstanding Securities of such series, to waive, with certain exceptions, such past default with respect to such series and its consequences. The Indenture also permits the Holders of not less than a majority in principal amount of the Outstanding Securities of any series, on behalf of the Holders of all Outstanding Securities of such series, to waive compliance by the Company with certain provisions of the Indenture. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange therefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security.

Restrictive Covenants. The Indenture does not limit unsecured debt of the Company or any of its Subsidiaries.

Denominations, Transfer and Exchange. The Securities of this series are issuable only in registered form without coupons in denominations of $2,000 and in integral multiples of $1,000 in excess

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thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registerable in the Security Register, upon surrender of this Security for registration of transfer at the Registrar accompanied by a written request for transfer in form satisfactory to the Company and the Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this series and of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Persons Deemed Owners. Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

Miscellaneous. The Indenture and this Security shall be governed by and construed in accordance with the law of the State of New York.

All terms used in this Security and not defined herein shall have the meanings assigned to them in the Indenture.

The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Security or any document to be signed in connection with this Security shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, to the extent and as provided for in any applicable law, including the federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act, or any other state laws based on the Uniform Electronic Transactions Act, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

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