MKSI

SEC source: 0001127602-24-028957 · form4.xml · derivative · entry 4

Lee John Tseng-Chung · CIK 0001414656 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,868.452

Underlying: Common Stock · 2,010 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: Portion of 2023 RSU Award accelerated to satisfy FICA taxes.

F3 · derivative.expiration_date: Portion of 2023 RSU Award accelerated to satisfy FICA taxes.

SEC source: 0001127602-24-028957 · form4.xml · nonDerivative · entry 3

Lee John Tseng-Chung · CIK 0001414656 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,688.5497

F2 · kind: Shares used to satisfy FICA taxes.

SEC source: 0001127602-24-028957 · form4.xml · nonDerivative · entry 2

Lee John Tseng-Chung · CIK 0001414656 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 115,682.5497

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: 0001127602-24-028957 · form4.xml · nonDerivative · entry 1

Lee John Tseng-Chung · CIK 0001414656 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,698.5497

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: 0001127602-24-028395 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,659.055

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 15, 2024.

SEC source: 0001127602-24-027461 · form4.xml · derivative · entry 1

Mayampurath Ramakumar · CIK 0001859332 · EVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,590.823

Underlying: Common Stock · 16,590.823 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 two equal annual installments commencing on November 15, 2025, provided that if, in any vesting year, November 15th is not a business day, such vesting shall occur on the next business day.

F2 · derivative.expiration_date: These RSUs vest in two equal annual installments commencing on November 15, 2025, provided that if, in any vesting year, November 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-24-026485 · form4.xml · nonDerivative · entry 1

JABRE WISSAM G · CIK 0001903967 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,008.637

F1 · kind: These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (subject to the terms and conditions of the restricted stock unit agreement).

F2 · price: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-24-024847 · form4.xml · nonDerivative · entry 1

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,282.965

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 30, 2023.

SEC source: 0001127602-24-023370 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 17,934.055

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 15, 2024.

SEC source: 0001127602-24-022584 · form4.xml · derivative · entry 3

Schreiner James Alan · CIK 0001797189 · EVP & COO, MSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,869.409

Underlying: Common Stock · 3,961 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 shall vest in two installments, 60% of which shall vest on August 17, 2024 and 40% of which shall vest on August 17, 2025; provided that if, in any vesting year, August 17th is not a business day, such vesting shall occur on the next business day.

F3 · derivative.expiration_date: These RSUs shall vest in two installments, 60% of which shall vest on August 17, 2024 and 40% of which shall vest on August 17, 2025; provided that if, in any vesting year, August 17th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-24-022584 · form4.xml · nonDerivative · entry 2

Schreiner James Alan · CIK 0001797189 · EVP & COO, MSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,704.703

F2 · kind: These shares were withheld by MKS Instruments, Inc. to satisfy the tax withholding obligations triggered by the vesting of RSUs and do not represent a discretionary trade by the reporting person.

SEC source: 0001127602-24-022584 · form4.xml · nonDerivative · entry 1

Schreiner James Alan · CIK 0001797189 · EVP & COO, MSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,577.703

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: 0001127602-24-022410 · form4.xml · nonDerivative · entry 1

Williams John Edward · CIK 0001710173 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13

SEC source: 0001127602-24-022323 · form4.xml · derivative · entry 3

Williams John Edward · CIK 0001710173 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,525.205

Underlying: Common Stock · 946 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.

F2 · derivative.exercise_date: These RSUs vest in two equal annual installments commencing on August 15, 2024, provided that if, in any vesting year, August 15th is not a business day, such vesting shall occur on the next business day.

F2 · derivative.expiration_date: These RSUs vest in two equal annual installments commencing on August 15, 2024, provided that if, in any vesting year, August 15th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-24-022323 · form4.xml · nonDerivative · entry 2

Williams John Edward · CIK 0001710173 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,813

SEC source: 0001127602-24-022323 · form4.xml · nonDerivative · entry 1

Williams John Edward · CIK 0001710173 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,120

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: 0001127602-24-022408 · form4.xml · derivative · entry 1

McCarthy Michelle M · CIK 0001732461 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,390.414

Underlying: Common Stock · 166.348 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 on August 15, 2027.

F2 · derivative.expiration_date: These RSUs vest on August 15, 2027.

SEC source: 0001127602-24-021455 · form4.xml · nonDerivative · entry 1

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,532.965

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 30, 2023.

SEC source: 0001127602-24-017568 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 18,209.055

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 15, 2024.

SEC source: 0001127602-24-015595 · form4.xml · derivative · entry 1

Williams John Edward · CIK 0001710173 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,471.205

Underlying: Common Stock · 2,524.272 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, 2025, 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, 2025, 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: 0001127602-24-015591 · form4.xml · derivative · entry 1

Schreiner James Alan · CIK 0001797189 · EVP & COO, MSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,830.409

Underlying: Common Stock · 6,601.942 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 shall vest in two installments, 60% of which shall vest on August 17, 2024 and 40% of which shall vest on August 17, 2025; provided that if, in any vesting year, August 17th is not a business day, such vesting shall occur on the next business day.

F2 · derivative.expiration_date: These RSUs shall vest in two installments, 60% of which shall vest on August 17, 2024 and 40% of which shall vest on August 17, 2025; provided that if, in any vesting year, August 17th is not a business day, such vesting shall occur on the next business day.

SEC source: 0001127602-24-014663 · form4.xml · nonDerivative · entry 1

Warner Michelle M · CIK 0001661884 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,851.835

F1 · kind: These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).

F2 · price: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-24-014659 · form4.xml · nonDerivative · entry 1

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,782.965

F1 · kind: These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).

F2 · price: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-24-014657 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,484.055

F1 · kind: These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).

F2 · price: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-24-014654 · form4.xml · nonDerivative · entry 1

Donahue Joseph B · CIK 0001413323 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,871.406

F1 · kind: These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).

F2 · price: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-24-014646 · form4.xml · nonDerivative · entry 1

Batra Raj · CIK 0001754514 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,966

F1 · kind: These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).

F2 · price: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-24-014651 · form4.xml · nonDerivative · entry 1

CANNONE PETER III · CIK 0001276985 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,132.741

F1 · kind: These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).

F2 · price: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-24-014643 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,737.588

F1 · kind: These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).

F2 · price: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-24-012974 · form4.xml · derivative · entry 2

McCarthy Michelle M · CIK 0001732461 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,224.066

Underlying: Common Stock · 3,319.502 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 April 15, 2025, provided that if, in any vesting year, April 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 April 15, 2025, 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: 0001127602-24-012974 · form4.xml · derivative · entry 1

McCarthy Michelle M · CIK 0001732461 · VP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,904.564

Underlying: Common Stock · 2,904.564 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 April 15, 2025, provided that if, in any vesting year, April 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 April 15, 2025, 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: 0001127602-24-011695 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,862.258

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 17, 2023.

SEC source: 0001127602-24-007997 · form4.xml · nonDerivative · entry 1

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,161.168

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 30, 2023.

SEC source: 0001127602-24-007993 · form4.xml · nonDerivative · entry 1

Burke Kathleen Flaherty · CIK 0001775435 · EVP, GC & Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,999.021

SEC source: 0001127602-24-006799 · form4.xml · nonDerivative · entry 3

BAGSHAW SETH H · CIK 0001192439 · EVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0.788

F3 · price: This transaction was executed in multiple trades at prices ranging from $124.450 to $124.640. 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: 0001127602-24-006799 · form4.xml · nonDerivative · entry 2

BAGSHAW SETH H · CIK 0001192439 · EVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,000.788

F2 · price: This transaction was executed in multiple trades at prices ranging from $123.360 to $124.280. 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: 0001127602-24-006799 · form4.xml · nonDerivative · entry 1

BAGSHAW SETH H · CIK 0001192439 · EVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,612.788

F1 · price: This transaction was executed in multiple trades at prices ranging from $122.250 to $123.200. 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: 0001127602-24-005636 · form4.xml · nonDerivative · entry 1

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,411.168

F1 · price: This transaction was executed in multiple trades at prices ranging from $123.920 to $124.100. 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: 0001127602-24-005325 · form4.xml · derivative · entry 14

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,112.739

Underlying: Common Stock · 1,030 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.

F9 · 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.

F9 · 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: 0001127602-24-005325 · form4.xml · derivative · entry 13

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,142.739

Underlying: Common Stock · 1,988 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.

F8 · derivative.exercise_date: These RSUs were subject to performance criteria, the achievement of which was determined on February 5, 2024, and thereafter vest in three equal annual installments beginning 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.

F8 · derivative.expiration_date: These RSUs were subject to performance criteria, the achievement of which was determined on February 5, 2024, and thereafter vest in three equal annual installments beginning 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: 0001127602-24-005325 · form4.xml · derivative · entry 12

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,130.739

Underlying: Common Stock · 907 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: 0001127602-24-005325 · form4.xml · derivative · entry 11

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,037.739

Underlying: Common Stock · 1,260 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: 0001127602-24-005325 · form4.xml · derivative · entry 10

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,297.739

Underlying: Common Stock · 552.052 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: 0001127602-24-005325 · form4.xml · derivative · entry 9

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,849.791

Underlying: Common Stock · 1,104.105 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: 0001127602-24-005325 · form4.xml · derivative · entry 8

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,953.896

Underlying: Common Stock · 2,906.742 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, 2025, 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, 2025, 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: 0001127602-24-005325 · form4.xml · nonDerivative · entry 7

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,133.792

F2 · kind: These shares were withheld by MKS Instruments, Inc. to satisfy the tax withholding obligations triggered by the vesting of RSUs and do not represent a discretionary trade by the reporting person.

SEC source: 0001127602-24-005325 · form4.xml · nonDerivative · entry 6

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,685.792

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: 0001127602-24-005325 · form4.xml · nonDerivative · entry 5

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,655.792

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: 0001127602-24-005325 · form4.xml · nonDerivative · entry 4

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,667.792

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: 0001127602-24-005325 · form4.xml · nonDerivative · entry 3

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,760.792

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: 0001127602-24-005325 · form4.xml · nonDerivative · entry 2

Gitin Mark Milton · CIK 0001842711 · EVP & GM, PSD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,500.792

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.