Sec Form 4/A Filing - TULANEY THOMAS P @ PEOPLES FINANCIAL SERVICES CORP. - 2026-02-27

FORM 4/A 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 TULANEY THOMAS P 2. Issuer Name and Ticker or Trading Symbol PEOPLES FINANCIAL SERVICES CORP. [ PFIS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) PRESIDENT (Last) (First) (Middle) C/O PEOPLES SECURITY BANK & TRUST CO, 30 E D PREATE DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 02/27/2026 (Street) MOOSIC, PA18507 4. If Amendment, Date Original Filed (MM/DD/YY) 03/03/2026 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 Common Stock 02/27/2026 A 1,880 ( 2 ) A $ 0 22,369 D Common Stock 02/27/2026 F 633 ( 2 ) D $ 53.6 21,736 ( 1 ) D Common Stock 19,519.4883 I By IRA

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 Restricted Stock Unit ( 3 ) ( 4 ) ( 4 ) Common Stock 1,075 1,075 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other TULANEY THOMAS P C/O PEOPLES SECURITY BANK & TRUST CO 30 E D PREATE DRIVE MOOSIC, PA18507 PRESIDENT Signatures /s/ Stephanie A. Westington, CPA, As Attorney in Fact for Thomas P. Tulaney 04/07/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This amount includes 607 shares of time based restricted common stock solely owned by Mr. Tulaney and 21,129 shares held jointly with his spouse. This amended Form 4 corrects the amounts erroneously reported on Mr. Tulaney's Form 4 filed March 3, 2026. ( 2 )On March 3, 2026, the reporting person filed a Form 4 which inadvertently reported the vesting of 2,818 performance based stock awards and 1,121 shares withheld for taxes. As reported in this amendment, 1,880 performance based stock awards vested and 633 shares were withheld for taxes. ( 3 )Each restricted stock unit represents a contingent right to receive one share of PFIS common stock. ( 4 )The restricted stock units vest in three equal annual installments beginning March 11, 2026.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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