KWR

SEC source: 0000081362-25-000100 · wk-form4_1748983289.xml · nonDerivative · entry 1

Shaller Russell · CIK 0001646159 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,856

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000081362-25-000096 · wk-form4_1748983079.xml · derivative · entry 4

Hinduja Sanjay · CIK 0001783867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9 shares

Expires 2025-05-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000096 · wk-form4_1748983079.xml · derivative · entry 3

Hinduja Sanjay · CIK 0001783867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 716 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

F3 · derivative.expiration_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

SEC source: 0000081362-25-000096 · wk-form4_1748983079.xml · nonDerivative · entry 2

Hinduja Sanjay · CIK 0001783867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,977

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000096 · wk-form4_1748983079.xml · nonDerivative · entry 1

Hinduja Sanjay · CIK 0001783867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,968

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000081362-25-000094 · wk-form4_1748982992.xml · derivative · entry 4

Henry Charlotte C. · CIK 0001811774 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9 shares

Expires 2025-05-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000094 · wk-form4_1748982992.xml · derivative · entry 3

Henry Charlotte C. · CIK 0001811774 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 716 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

F3 · derivative.expiration_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

SEC source: 0000081362-25-000094 · wk-form4_1748982992.xml · nonDerivative · entry 2

Henry Charlotte C. · CIK 0001811774 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,271

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000094 · wk-form4_1748982992.xml · nonDerivative · entry 1

Henry Charlotte C. · CIK 0001811774 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,262

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000081362-25-000092 · wk-form4_1748982882.xml · derivative · entry 4

FRISBY JEFFRY D · CIK 0001061274 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9 shares

Expires 2025-05-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000092 · wk-form4_1748982882.xml · derivative · entry 3

FRISBY JEFFRY D · CIK 0001061274 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 716 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

F3 · derivative.expiration_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

SEC source: 0000081362-25-000092 · wk-form4_1748982882.xml · nonDerivative · entry 2

FRISBY JEFFRY D · CIK 0001061274 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,082

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000092 · wk-form4_1748982882.xml · nonDerivative · entry 1

FRISBY JEFFRY D · CIK 0001061274 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,073

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000081362-25-000090 · wk-form4_1748982812.xml · derivative · entry 5

Foufopoulos - De Ridder Lucrece · CIK 0001994178 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6 shares

Expires 2025-05-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000090 · wk-form4_1748982812.xml · derivative · entry 4

Foufopoulos - De Ridder Lucrece · CIK 0001994178 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 596 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F4 · derivative.exercise_date: On July 31, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

F4 · derivative.expiration_date: On July 31, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

SEC source: 0000081362-25-000090 · wk-form4_1748982812.xml · nonDerivative · entry 2

Foufopoulos - De Ridder Lucrece · CIK 0001994178 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 879

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000090 · wk-form4_1748982812.xml · nonDerivative · entry 1

Foufopoulos - De Ridder Lucrece · CIK 0001994178 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 873

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000081362-25-000088 · wk-form4_1748982733.xml · derivative · entry 4

DOUGLAS MARK · CIK 0001434812 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9 shares

Expires 2025-05-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000088 · wk-form4_1748982733.xml · derivative · entry 3

DOUGLAS MARK · CIK 0001434812 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 716 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

F3 · derivative.expiration_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

SEC source: 0000081362-25-000088 · wk-form4_1748982733.xml · nonDerivative · entry 2

DOUGLAS MARK · CIK 0001434812 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,296

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000088 · wk-form4_1748982733.xml · nonDerivative · entry 1

DOUGLAS MARK · CIK 0001434812 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,287

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000081362-25-000086 · wk-form4_1748982500.xml · derivative · entry 4

BARRY MICHAEL F · CIK 0001238141 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9 shares

Expires 2025-05-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000086 · wk-form4_1748982500.xml · derivative · entry 3

BARRY MICHAEL F · CIK 0001238141 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 716 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

F3 · derivative.expiration_date: On June 1, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

SEC source: 0000081362-25-000086 · wk-form4_1748982500.xml · nonDerivative · entry 2

BARRY MICHAEL F · CIK 0001238141 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,674

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000086 · wk-form4_1748982500.xml · nonDerivative · entry 1

BARRY MICHAEL F · CIK 0001238141 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,665

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000081362-25-000084 · wk-form4_1748982434.xml · derivative · entry 5

BAKHSHI NANDITA · CIK 0002024624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6 shares

Expires 2025-05-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F2 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000084 · wk-form4_1748982434.xml · derivative · entry 4

BAKHSHI NANDITA · CIK 0002024624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 596 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F4 · derivative.exercise_date: On July 31, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

F4 · derivative.expiration_date: On July 31, 2024, the reporting person was granted time-based restricted stock units that vested 100% on May 31, 2025.

SEC source: 0000081362-25-000084 · wk-form4_1748982434.xml · nonDerivative · entry 2

BAKHSHI NANDITA · CIK 0002024624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 879

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000084 · wk-form4_1748982434.xml · nonDerivative · entry 1

BAKHSHI NANDITA · CIK 0002024624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 873

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0001104659-25-053053 · tm2516178-3_4seq1.xml · derivative · entry 1

Gulf Hungary Holding Korlatolt Felelossegu Tarsasag · CIK 0001783455 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By QH Hungary Holdings Limited

Disclosed balance after: 350,000

Underlying: Common Stock · 350,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On May 22, 2025, QH Hungary Holdings Limited, a wholly owned subsidiary of the reporting person ("QH Hungary"), amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · derivative.exercise_price: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023, and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · derivative.exercise_price: For each Component, QH Hungary is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at QH Hungary's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, QH Hungary paid $4,828,795 to Citibank.

F1 · kind: On May 22, 2025, QH Hungary Holdings Limited, a wholly owned subsidiary of the reporting person ("QH Hungary"), amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · kind: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023, and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · kind: For each Component, QH Hungary is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at QH Hungary's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, QH Hungary paid $4,828,795 to Citibank.

F1 · price: On May 22, 2025, QH Hungary Holdings Limited, a wholly owned subsidiary of the reporting person ("QH Hungary"), amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · price: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023, and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · price: For each Component, QH Hungary is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at QH Hungary's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, QH Hungary paid $4,828,795 to Citibank.

F1 · derivative.exercise_date: On May 22, 2025, QH Hungary Holdings Limited, a wholly owned subsidiary of the reporting person ("QH Hungary"), amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · derivative.exercise_date: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023, and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · derivative.exercise_date: For each Component, QH Hungary is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at QH Hungary's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, QH Hungary paid $4,828,795 to Citibank.

F1 · derivative.expiration_date: On May 22, 2025, QH Hungary Holdings Limited, a wholly owned subsidiary of the reporting person ("QH Hungary"), amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · derivative.expiration_date: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023, and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · derivative.expiration_date: For each Component, QH Hungary is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at QH Hungary's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, QH Hungary paid $4,828,795 to Citibank.

SEC source: 0001104659-25-053051 · tm2516178-2_4seq1.xml · derivative · entry 1

QH Hungary Holdings Ltd · CIK 0001808660 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 350,000

Underlying: Common Stock · 350,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On May 22, 2025, the Reporting Person amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · derivative.exercise_price: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023 and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · derivative.exercise_price: For each Component, the Reporting Person is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at the Reporting Person's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, the Reporting Person paid $4,828,795 to Citibank.

F1 · kind: On May 22, 2025, the Reporting Person amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · kind: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023 and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · kind: For each Component, the Reporting Person is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at the Reporting Person's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, the Reporting Person paid $4,828,795 to Citibank.

F1 · price: On May 22, 2025, the Reporting Person amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · price: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023 and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · price: For each Component, the Reporting Person is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at the Reporting Person's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, the Reporting Person paid $4,828,795 to Citibank.

F1 · derivative.exercise_date: On May 22, 2025, the Reporting Person amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · derivative.exercise_date: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023 and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · derivative.exercise_date: For each Component, the Reporting Person is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at the Reporting Person's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, the Reporting Person paid $4,828,795 to Citibank.

F1 · derivative.expiration_date: On May 22, 2025, the Reporting Person amended an existing and previously reported variable prepaid forward sale contract ("VPF") with Citibank, N.A. ("Citibank"). See Footnotes 2 and 3 and Remarks for details of the amended transaction.

F2 · derivative.expiration_date: The amended VPF with Citibank originally entered into on March 9, 2021, as amended and restated on November 24, 2021, as further amended and restated on November 22, 2023 and as further amended and restated on May 22, 2025 covering a maximum aggregate amount of 350,000 shares ("Citi VPF No. 1") is divided into 50 components (each a "Component").

F3 · derivative.expiration_date: For each Component, the Reporting Person is obligated to deliver, on the settlement date (the "Settlement Date") determined based on the specified scheduled valuation date within the periods from June 1, 2027 to August 11, 2027 either, at the Reporting Person's option, (i) up to 7,000 Shares to Citibank (such Share number, "Subject Number") based on the average market price of the Shares determined as described below in Remarks or (ii) an amount of cash equivalent to the value of such Shares. In exchange for amending Citi VPF No. 1, the Reporting Person paid $4,828,795 to Citibank.

SEC source: 0000081362-25-000065 · wk-form4_1747167429.xml · nonDerivative · entry 1

BERQUIST JOSEPH A · CIK 0001487224 · Director · CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,243

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $103.54 to $103.7619, inclusive. The reporting person undertakes to provide to Quaker Chemical Corporation, d/b/a "Quaker Houghton", any security holder of Quaker Houghton, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4.

SEC source: 0000081362-25-000047 · wk-form4_1742336680.xml · nonDerivative · entry 8

Slinkman David · CIK 0001783823 · SVP - Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,031

F5 · shares: Shares surrendered by reporting person to satisfy withholding tax obligation upon vesting of restricted stock granted on March 16, 2022 under the Company's Long-Term Performance Incentive Plan.

SEC source: 0000081362-25-000028 · wk-form4_1742335677.xml · nonDerivative · entry 9

Bijlani Jeewat · CIK 0001783821 · EVP, Chief Strategy Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,806

F6 · shares: Shares surrendered by reporting person to satisfy withholding tax obligation upon vesting of special restricted stock granted on October 17, 2022 under the Company's Long-Term Performance Incentive Plan.

SEC source: 0000081362-25-000028 · wk-form4_1742335677.xml · nonDerivative · entry 8

Bijlani Jeewat · CIK 0001783821 · EVP, Chief Strategy Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,054

F5 · shares: Shares surrendered by reporting person to satisfy withholding tax obligation upon vesting of restricted stock granted on March 16, 2022 under the Company's Long-Term Performance Incentive Plan.

SEC source: 0000081362-25-000026 · wk-form4_1742335597.xml · nonDerivative · entry 8

BERQUIST JOSEPH A · CIK 0001487224 · Director · CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,761

F5 · shares: Shares surrendered by reporting person to satisfy withholding tax obligation upon vesting of restricted stock granted on March 16, 2022 under the Company's Long-Term Performance Incentive Plan.

SEC source: 0000081362-25-000049 · wk-form4_1742336742.xml · derivative · entry 9

Traub Robert T · CIK 0001783973 · SVP, GC & Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,603

Underlying: Common Stock · 1,603 shares

Expires not disclosed

F8 · derivative.exercise_price: Time-based restricted stock units granted under the Company's Long-Term Performance Incentive Plan. Each restricted stock unit represents a contingent right to receive one share of KWR common stock.

F9 · shares: The restricted stock units vest in three annual installments beginning on March 15, 2026. Dividend equivalent rights accrue with respect to these restricted stock units when and as dividends are paid on KWR's common stock.

F9 · derivative.exercise_date: The restricted stock units vest in three annual installments beginning on March 15, 2026. Dividend equivalent rights accrue with respect to these restricted stock units when and as dividends are paid on KWR's common stock.

F9 · derivative.expiration_date: The restricted stock units vest in three annual installments beginning on March 15, 2026. Dividend equivalent rights accrue with respect to these restricted stock units when and as dividends are paid on KWR's common stock.

SEC source: 0000081362-25-000049 · wk-form4_1742336742.xml · derivative · entry 8

Traub Robert T · CIK 0001783973 · SVP, GC & Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3 shares

Expires 2025-03-15

F3 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F3 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F3 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000049 · wk-form4_1742336742.xml · derivative · entry 7

Traub Robert T · CIK 0001783973 · SVP, GC & Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 686

Underlying: Common Stock · 343 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F7 · derivative.exercise_date: On March 15, 2024, the reporting person was granted 1,029 time-based restricted stock units, vesting in three equal installments beginning on March 15, 2025.

F7 · derivative.expiration_date: On March 15, 2024, the reporting person was granted 1,029 time-based restricted stock units, vesting in three equal installments beginning on March 15, 2025.

SEC source: 0000081362-25-000049 · wk-form4_1742336742.xml · nonDerivative · entry 5

Traub Robert T · CIK 0001783973 · SVP, GC & Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,991

F5 · shares: Shares surrendered by reporting person to satisfy withholding tax obligation upon vesting of restricted stock granted on March 16, 2022 under the Company's Long-Term Performance Incentive Plan.

SEC source: 0000081362-25-000049 · wk-form4_1742336742.xml · nonDerivative · entry 4

Traub Robert T · CIK 0001783973 · SVP, GC & Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,135

F4 · shares: Shares surrendered by reporting person to satisfy withholding tax obligation upon partial vesting of restricted stock granted on March 15, 2024 under the Company's Long-Term Performance Incentive Plan.

SEC source: 0000081362-25-000049 · wk-form4_1742336742.xml · nonDerivative · entry 3

Traub Robert T · CIK 0001783973 · SVP, GC & Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,220

F3 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000049 · wk-form4_1742336742.xml · nonDerivative · entry 2

Traub Robert T · CIK 0001783973 · SVP, GC & Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,217

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000081362-25-000049 · wk-form4_1742336742.xml · nonDerivative · entry 1

Traub Robert T · CIK 0001783973 · SVP, GC & Corp. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,874

F1 · shares: Shares surrendered by reporting person to satisfy withholding tax obligation upon partial vesting of restricted stock granted on March 15, 2023 under the Company's Long-Term Performance Incentive Plan.

SEC source: 0000081362-25-000047 · wk-form4_1742336680.xml · derivative · entry 14

Slinkman David · CIK 0001783823 · SVP - Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,089

Underlying: Common Stock · 1,089 shares

Expires not disclosed

F9 · derivative.exercise_price: Time-based restricted stock units granted under the Company's Long-Term Performance Incentive Plan. Each restricted stock unit represents a contingent right to receive one share of KWR common stock.

F10 · shares: The restricted stock units vest in three annual installments beginning on March 15, 2026. Dividend equivalent rights accrue with respect to these restricted stock units when and as dividends are paid on KWR's common stock.

F10 · derivative.exercise_date: The restricted stock units vest in three annual installments beginning on March 15, 2026. Dividend equivalent rights accrue with respect to these restricted stock units when and as dividends are paid on KWR's common stock.

F10 · derivative.expiration_date: The restricted stock units vest in three annual installments beginning on March 15, 2026. Dividend equivalent rights accrue with respect to these restricted stock units when and as dividends are paid on KWR's common stock.

SEC source: 0000081362-25-000047 · wk-form4_1742336680.xml · derivative · entry 13

Slinkman David · CIK 0001783823 · SVP - Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4 shares

Expires 2025-03-15

F3 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F3 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F3 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000047 · wk-form4_1742336680.xml · derivative · entry 12

Slinkman David · CIK 0001783823 · SVP - Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 716

Underlying: Common Stock · 358 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F8 · derivative.exercise_date: On March 15, 2024, the reporting person was granted 1,074 special time-based restricted stock units, vesting in three annual installments beginning on March 15, 2025.

F8 · derivative.expiration_date: On March 15, 2024, the reporting person was granted 1,074 special time-based restricted stock units, vesting in three annual installments beginning on March 15, 2025.

SEC source: 0000081362-25-000047 · wk-form4_1742336680.xml · derivative · entry 11

Slinkman David · CIK 0001783823 · SVP - Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2 shares

Expires 2025-03-15

F3 · derivative.exercise_price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F3 · price: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

F3 · derivative.exercise_date: Settlement of dividend equivalent rights in connection with vesting of restricted stock unit. The rights accrued when and as dividends were paid on KWR common stock. Each dividend equivalent right was the economic equivalent of one share of KWR common stock.

SEC source: 0000081362-25-000047 · wk-form4_1742336680.xml · derivative · entry 10

Slinkman David · CIK 0001783823 · SVP - Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 466

Underlying: Common Stock · 233 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F7 · derivative.exercise_date: On March 15, 2024, the reporting person was granted 699 time-based restricted stock units, vesting in three annual installments beginning on March 15, 2025.

F7 · derivative.expiration_date: On March 15, 2024, the reporting person was granted 699 time-based restricted stock units, vesting in three annual installments beginning on March 15, 2025.

SEC source: 0000081362-25-000047 · wk-form4_1742336680.xml · nonDerivative · entry 7

Slinkman David · CIK 0001783823 · SVP - Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,185

F4 · shares: Shares surrendered by reporting person to satisfy withholding tax obligation upon partial vesting of restricted stock units granted on March 15, 2024 under the Company's Long-Term Performance Incentive Plan.