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 * Traub Robert T 2. Issuer Name and Ticker or Trading Symbol QUAKER CHEMICAL CORP [KWR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP, GC & Corp. Sec. (Last) (First) (Middle) 901 E. HECTOR STREET 3. Date of Earliest Transaction (Month/Day/Year) 03/15/2026 (Street) CONSHOHOCKEN, PA 19428-2380 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 03/15/2026 A 1,028(1) A $ 0 4,019 D Common Stock 03/15/2026 M 343 A (2) 4,362 D Common Stock 03/15/2026 M 534 A (2) 4,896 D Common Stock 03/15/2026 M 17 A (3) 4,913 D Common Stock 03/15/2026 F 562(4) D $118.45 4,351 D Common Stock 1,262(5) I By 401(k)

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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)

03/15/2026

M

343

(6)

(6)

Common Stock

343

$ 0

343

D

Restricted Stock Units

(2)

03/15/2026

M

534

(7)

(7)

Common Stock

534

$ 0

1,069

D

Dividend Equivalent Rights

(3)

03/15/2026

M

17

(3)

03/15/2026

Common Stock

17

(3)

0

D

Restricted Stock Units

(8)

03/15/2026

A

1,772

(8)

(8)

Common Stock

1,772

$ 0

1,772

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Traub Robert T 901 E. HECTOR STREET CONSHOHOCKEN, PA 19428-2380			SVP, GC & Corp. Sec.

Signatures

Victoria K. Gehris, Attorney-in-Fact for Robert T. Traub		03/17/2026
**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)	Shares earned upon vesting and settlement of Performance Stock Units (PSUs) awarded on March 15, 2023, upon certification of performance results by the Compensation and Human Resources Committee based on achievement of the adjusted return on invested capital (ROIC) metric, during the three year performance period.
(2)	Restricted stock units (RSUs) convert into common stock on a one-for-one basis.
(3)	Dividend equivalent rights (DERs) accrued on reporting person's RSUs granted on March 15, 2024 and March 15, 2025. The rights accrued when and as dividends were paid on KWR common stock. This Form 4 reports the settlement of DERs in connection with the second installment of the 2024 RSU grant and the first installment of the 2025 RSU grant, each vesting on March 15, 2026. Each DER was the economic equivalent of one share of KWR common stock.
(4)	Shares surrendered by reporting person to satisfy withholding tax obligation upon the full or partial vesting of certain restricted stock, PSUs, and RSUs previously granted under the Company's Long-Term Performance Incentive Plan.
(5)	Information based on reporting person's Plan Statement as of December 31, 2025.
(6)	On March 15, 2024, the reporting person was granted 1,029 time-based RSUs, vesting in three annual installments beginning on March 15, 2025.
(7)	On March 15, 2025, the reporting person was granted 1,603 time-based RSUs, vesting in three annual installments beginning on March 15, 2026.
(8)	Time-based RSUs granted under the Company's Long-Term Performance Incentive Plan, which will vest in three annual installments beginning on March 15, 2027. Each RSU represents a contingent right to receive one share of KWR common stock and DERs accrue with respect to these RSUs when and as dividends are paid on KWR common stock.

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