Sec Form 4 Filing - SAHNI PAYAL @ PFIZER INC - 2024-09-12

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person SAHNI PAYAL 2. Issuer Name and Ticker or Trading Symbol PFIZER INC [ PFE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Executive Vice President (Last) (First) (Middle) 66 HUDSON BOULEVARD EAST, ATTN: CORPORATE SECRETARY 3. Date of Earliest Transaction (MM/DD/YY) 09/12/2024 (Street) NEW YORK, NY10001-2192 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Appreciation Rights $ 42.3 09/12/2024 D 45,920 ( 1 ) 02/23/2028 02/23/2028 Common Stock 45,920 $ 0 0 D Stock Appreciation Rights $ 42.3 09/12/2024 A 45,920 ( 1 ) 02/23/2030 02/23/2030( 2 ) Common Stock 45,920 $ 0 45,920 D Stock Appreciation Rights $ 45.96 09/12/2024 D 42,265 ( 1 ) 02/24/2027 02/24/2027 Common Stock 42,265 $ 0 0 D Stock Appreciation Rights $ 45.96 09/12/2024 A 42,265 ( 1 ) 02/24/2029 02/24/2029( 2 ) Common Stock 42,265 $ 0 42,265 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other SAHNI PAYAL 66 HUDSON BOULEVARD EAST ATTN: CORPORATE SECRETARY NEW YORK, NY10001-2192 Executive Vice President Signatures Susan E. Grant, by power of atty., for Payal Sahni 09/16/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents the number of shares of issuer common stock underlying stock appreciation rights ("total shareholder return units" or "TSRUs") eligible for modification ("Eligible TSRUs") pursuant to the issuer's one-time offer to modify Eligible TSRUs (the "Modification Offer") described in the Tender Offer Statement on Schedule TO filed by the issuer with the Securities and Exchange Commission on August 12, 2024 (as amended, the "Schedule TO") that the reporting person elected to modify. The Modification Offer provided eligible participants the opportunity to elect to modify certain outstanding TSRUs to extend the dates upon which the awards vest and settle by two years (the "Modified TSRUs"). The grant price and number of shares underlying the Modified TSRUs remain unchanged. ( 2 )Reflects a modification to the settlement date of the Modified TSRUs pursuant to the Modification Offer. The grant price and number of shares underlying the Modified TSRUs remain unchanged.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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