Taranto Eric Robert

SEC source: 0001127602-23-013194 · form4.xml · nonDerivative · entry 1

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,985.3104

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-23-005516 · form4.xml · derivative · entry 10

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,684.268

Underlying: Common Stock · 804 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F7 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F7 · derivative.expiration_date: These RSUs vest in three equal annual installments commencing on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-23-005516 · form4.xml · derivative · entry 9

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,488.268

Underlying: Common Stock · 1,117 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F6 · derivative.exercise_date: These RSUs were subject to performance criteria, the achievement of which was determined on February 8, 2023, and thereafter vest in three equal annual installments beginning on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F6 · derivative.expiration_date: These RSUs were subject to performance criteria, the achievement of which was determined on February 8, 2023, and thereafter vest in three equal annual installments beginning on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-23-005516 · form4.xml · derivative · entry 8

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,605.268

Underlying: Common Stock · 387 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F5 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F5 · derivative.expiration_date: These RSUs vest in three equal annual installments commencing on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-23-005516 · form4.xml · derivative · entry 7

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,992.268

Underlying: Common Stock · 774 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F4 · derivative.exercise_date: These RSUs were subject to performance criteria, the achievement of which was determined on January 21, 2022, and thereafter vest in three equal annual installments beginning on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F4 · derivative.expiration_date: These RSUs were subject to performance criteria, the achievement of which was determined on January 21, 2022, and thereafter vest in three equal annual installments beginning on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-23-005516 · form4.xml · derivative · entry 6

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,766.268

Underlying: Common Stock · 2,742.048 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F3 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on February 15, 2024, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F3 · derivative.expiration_date: These RSUs vest in three equal annual installments commencing on February 15, 2024, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-23-005516 · form4.xml · nonDerivative · entry 5

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,050.7734

F2 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

SEC source: 0001127602-23-005516 · form4.xml · nonDerivative · entry 4

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,956.7734

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-23-005516 · form4.xml · nonDerivative · entry 3

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,152.7734

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-23-005516 · form4.xml · nonDerivative · entry 2

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,035.7734

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-23-005516 · form4.xml · nonDerivative · entry 1

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,648.7734

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-23-004181 · form4.xml · derivative · entry 1

Taranto Eric Robert · CIK 0001842235 · EVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,024.22

Underlying: Common Stock · 3,353.659 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F2 · derivative.exercise_date: These RSUs were subject to performance criteria, the achievement of which was determined on February 8, 2023, and thereafter vest in three equal annual installments beginning on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F2 · derivative.expiration_date: These RSUs were subject to performance criteria, the achievement of which was determined on February 8, 2023, and thereafter vest in three equal annual installments beginning on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-22-012855 · form4.xml · derivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, VSD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,670.561

Underlying: Common Stock · 2,412.704 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F2 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F2 · derivative.expiration_date: These RSUs vest in three equal annual installments commencing on February 15, 2023, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-22-012132 · form4.xml · derivative · entry 5

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,257.857

Underlying: Common Stock · 935 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F4 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on April 17, 2021, provided that if, in any vesting year, April 17th is not a business day, such vesting shall occur on the next business day.

F4 · derivative.expiration_date: These RSUs vest in three equal annual installments commencing on April 17, 2021, provided that if, in any vesting year, April 17th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-22-012132 · form4.xml · derivative · entry 4

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,192.857

Underlying: Common Stock · 786.7 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F3 · derivative.exercise_date: These RSUs vest in two equal annual installments commencing on April 15, 2021, provided that if, in any vesting year, April 15th is not a business day, such vesting shall occur on the next business day.

F3 · derivative.expiration_date: These RSUs vest in two equal annual installments commencing on April 15, 2021, provided that if, in any vesting year, April 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-22-012132 · form4.xml · nonDerivative · entry 3

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,696.8734

F2 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

SEC source: 0001127602-22-012132 · form4.xml · nonDerivative · entry 2

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,202.8734

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-22-012132 · form4.xml · nonDerivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,267.8734

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-22-005323 · form4.xml · derivative · entry 5

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,979.557

Underlying: Common Stock · 387 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F4 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F4 · derivative.expiration_date: These RSUs vest in three equal annual installments commencing on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-22-005323 · form4.xml · derivative · entry 4

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,366.557

Underlying: Common Stock · 774 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F3 · derivative.exercise_date: These RSUs were subject to performance criteria, the achievement of which was determined on January 21, 2022, and thereafter vest in three equal annual installments beginning on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F3 · derivative.expiration_date: These RSUs were subject to performance criteria, the achievement of which was determined on January 21, 2022, and thereafter vest in three equal annual installments beginning on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-22-005323 · form4.xml · nonDerivative · entry 3

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,481.1734

F2 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

SEC source: 0001127602-22-005323 · form4.xml · nonDerivative · entry 2

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,823.1734

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-22-005323 · form4.xml · nonDerivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,436.1734

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-22-001961 · form4.xml · derivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,140.557

Underlying: Common Stock · 2,322.88 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F2 · derivative.exercise_date: These RSUs were subject to performance criteria, achievement of which was determined on January 21, 2022 and thereafter vest in three equal annual installments beginning on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F2 · derivative.expiration_date: These RSUs were subject to performance criteria, achievement of which was determined on January 21, 2022 and thereafter vest in three equal annual installments beginning on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-21-014751 · form4.xml · nonDerivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,505.5164

F1 · price: This transaction was executed in multiple trades at prices ranging from $185.27 to $185.36. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001127602-21-014123 · form4.xml · derivative · entry 3

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,817.677

Underlying: Common Stock · 934 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F3 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on April 17, 2021, provided that if, in any vesting year, April 17th is not a business day, such vesting shall occur on the next business day.

F3 · derivative.expiration_date: These RSUs vest in three equal annual installments commencing on April 17, 2021, provided that if, in any vesting year, April 17th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-21-014123 · form4.xml · nonDerivative · entry 2

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,293.5164

F2 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

SEC source: 0001127602-21-014123 · form4.xml · nonDerivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,568.5164

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-21-013893 · form4.xml · derivative · entry 3

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,751.677

Underlying: Common Stock · 787 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F3 · derivative.exercise_date: These RSUs vest in two equal annual installments commencing on April 15, 2021, provided that if, in any vesting year, April 15th is not a business day, such vesting shall occur on the next business day.

F3 · derivative.expiration_date: These RSUs vest in two equal annual installments commencing on April 15, 2021, provided that if, in any vesting year, April 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-21-013893 · form4.xml · nonDerivative · entry 2

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,634.5164

F2 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

SEC source: 0001127602-21-013893 · form4.xml · nonDerivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,865.5164

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-21-013723 · form4.xml · derivative · entry 3

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,538.677

Underlying: Common Stock · 627.342 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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F3 · derivative.exercise_date: These RSUs vested on April 13, 2021.

F3 · derivative.expiration_date: These RSUs vested on April 13, 2021.

SEC source: 0001127602-21-013723 · form4.xml · nonDerivative · entry 2

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,078.5164

F2 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

SEC source: 0001127602-21-013723 · form4.xml · nonDerivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,263.5164

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: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-21-006384 · form4.xml · derivative · entry 1

Taranto Eric Robert · CIK 0001842235 · SVP & GM, V&A Division

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,166.019

Underlying: Common Stock · 1,161.44 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F2 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F2 · derivative.expiration_date: These RSUs vest in three equal annual installments commencing on February 15, 2022, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.