FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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

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(Print or Type Responses)

1. Name and Address of Reporting Person * KOPLIN NEAL D 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) SR EVP/CHIEF BANKING OFFICER (Last) (First) (Middle) C/O PEOPLES SECURITY BANK & TRUST CO, 30 E D PREATE DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 06/26/2026 (Street) MOOSIC, PA 18507 4. If Amendment, Date Original Filed (Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 10,534.893(1) D Common Stock 435.006 I IRA Common Stock 409 I PSBT 401(k) Profit Sharing Plan

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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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 Units

(2)

(3)

(3)

Common Stock

323

627(4)

D

Restricted Stock Units

(2)

06/26/2026

A

773

(5)

(5)

Common Stock

773

$ 0

773

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
KOPLIN NEAL D C/O PEOPLES SECURITY BANK & TRUST CO 30 E D PREATE DRIVE MOOSIC, PA 18507			SR EVP/CHIEF BANKING OFFICER

Signatures

/s/ James M. Bone, Jr., CPA As Attorney In Fact for Neal D. Koplin		06/30/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	This amount includes 183 shares of time-based restricted common stock and 10351.893 shares solely owned by Mr. Koplin which includes 119.577 shares acquired on 3/13/2026 under the Issuer's Dividend Reinvestment and Stock Purchase Plan (DRP) and 102.105 DRP shares acquired on 6/15/2026.
(2)	Each restricted stock unit (RSU) represents a contingent right to receive one share of PFIS common stock.
(3)	On 3/28/2025, Mr. Koplin was granted 950 RSUs vesting in three annual installments beginning 3/11/2026.
(4)	323 RSUs vested on 3/11/2026 leaving 314 RSUs to vest on 3/11/2027 and 313 RSUs to vest on 3/11/2028.
(5)	On 6/26/2026, Mr. Koplin was granted 773 RSUs vesting in three annual installments beginning 3/11/2026.

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