MKSI

SEC source: 0001127602-19-034665 · form4.xml · nonDerivative · entry 4

BAGSHAW SETH H · CIK 0001192439 · Sr. VP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,620.132

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034665 · form4.xml · nonDerivative · entry 3

BAGSHAW SETH H · CIK 0001192439 · Sr. VP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,433.132

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034665 · form4.xml · nonDerivative · entry 2

BAGSHAW SETH H · CIK 0001192439 · Sr. VP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,274.132

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034665 · form4.xml · nonDerivative · entry 1

BAGSHAW SETH H · CIK 0001192439 · Sr. VP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,129.132

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034663 · form4.xml · derivative · entry 13

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,603.419

Underlying: Common Stock · 958 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F5 · derivative.exercise_date: Portion of 2019 RSU Award accelerated to satisfy FICA taxes.

F5 · derivative.expiration_date: Portion of 2019 RSU Award accelerated to satisfy FICA taxes.

SEC source: 0001127602-19-034663 · form4.xml · derivative · entry 12

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,561.419

Underlying: Common Stock · 559 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F4 · derivative.exercise_date: Portion of 2018 RSU Award accelerated to satisfy FICA taxes.

F4 · derivative.expiration_date: Portion of 2018 RSU Award accelerated to satisfy FICA taxes.

SEC source: 0001127602-19-034663 · form4.xml · derivative · entry 11

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,120.419

Underlying: Common Stock · 426 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F4 · derivative.exercise_date: Portion of 2018 RSU Award accelerated to satisfy FICA taxes.

F4 · derivative.expiration_date: Portion of 2018 RSU Award accelerated to satisfy FICA taxes.

SEC source: 0001127602-19-034663 · form4.xml · derivative · entry 10

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,546.419

Underlying: Common Stock · 363 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F3 · derivative.exercise_date: Portion of 2017 RSU Award accelerated to satisfy FICA taxes.

F3 · derivative.expiration_date: Portion of 2017 RSU Award accelerated to satisfy FICA taxes.

SEC source: 0001127602-19-034663 · form4.xml · derivative · entry 9

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,909.419

Underlying: Common Stock · 300 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F3 · derivative.exercise_date: Portion of 2017 RSU Award accelerated to satisfy FICA taxes.

F3 · derivative.expiration_date: Portion of 2017 RSU Award accelerated to satisfy FICA taxes.

SEC source: 0001127602-19-034663 · form4.xml · nonDerivative · entry 6

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F2 · kind: Shares used to satisfy FICA taxes.

SEC source: 0001127602-19-034663 · form4.xml · nonDerivative · entry 5

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,606

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034663 · form4.xml · nonDerivative · entry 4

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,648

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034663 · form4.xml · nonDerivative · entry 3

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,089

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034663 · form4.xml · nonDerivative · entry 2

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 663

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034663 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 300

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-034408 · form4.xml · nonDerivative · entry 1

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,212.825

SEC source: 0001127602-19-034129 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,817.649

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

SEC source: 0001127602-19-033326 · form4.xml · nonDerivative · entry 1

Beecher Gregory R · CIK 0001239380 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,123.649

SEC source: 0001127602-19-031313 · form4.xml · nonDerivative · entry 1

Burke Kathleen Flaherty · CIK 0001775435 · Sr. VP, GC & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,777.885

F1 · price: This transaction was executed in multiple trades at prices ranging from $110.40 to $110.72. 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: 0001127602-19-031236 · form4.xml · nonDerivative · entry 1

BAGSHAW SETH H · CIK 0001192439 · Sr. VP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,857.015

F1 · price: This transaction was executed in multiple trades at prices ranging from $111.57 to $112.77. 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: 0001127602-19-031211 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Gerald G. Colella Living Trust

Disclosed balance after: 38,548

SEC source: 0001127602-19-031238 · form4.xml · derivative · entry 1

Burke Kathleen Flaherty · CIK 0001775435 · Sr. VP, GC & Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,181.299

Underlying: Common Stock · 4,358.058 shares

Expires not disclosed

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

F1 · price: Each restricted stock unit 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 equal annual installments on each of the second anniversary and third anniversary of the date of grant.

F2 · derivative.expiration_date: These RSUs shall vest in two equal annual installments on each of the second anniversary and third anniversary of the date of grant.

SEC source: 0001127602-19-031236 · form4.xml · derivative · entry 2

BAGSHAW SETH H · CIK 0001192439 · Sr. VP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,001.263

Underlying: Common Stock · 8,716.116 shares

Expires not disclosed

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

F2 · price: Each restricted stock unit 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 equal annual installments on each of the second anniversary and third anniversary of the date of grant.

F3 · derivative.expiration_date: These RSUs shall vest in two equal annual installments on each of the second anniversary and third anniversary of the date of grant.

SEC source: 0001127602-19-027836 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,217.649

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

SEC source: 0001127602-19-025995 · form4.xml · nonDerivative · entry 1

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,691.825

SEC source: 0001127602-19-021436 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director · CEO, Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Gerald G. Colella Living Trust

Disclosed balance after: 43,548

F1 · price: This transaction was executed in multiple trades at prices ranging from $75.59 to $76.01. 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.

F2 · balance_after: Balance adjusted to reflect cash payment in lieu of distribution of a fractional share.

SEC source: 0001127602-19-020609 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,617.649

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

SEC source: 0001127602-19-017948 · form4.xml · nonDerivative · entry 1

Warner Michelle M · CIK 0001661884 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,980.429

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: 0001127602-19-017944 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,017.649

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: 0001127602-19-017942 · form4.xml · nonDerivative · entry 2

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,294.825

SEC source: 0001127602-19-017942 · form4.xml · nonDerivative · entry 1

Moloney Jacqueline F · CIK 0001501968 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,550.825

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: 0001127602-19-017940 · form4.xml · nonDerivative · entry 1

Hess Rick D · CIK 0001331476 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,468.359

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: 0001127602-19-017938 · form4.xml · nonDerivative · entry 1

CHUTE RICHARD S · CIK 0001202741 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,616.22

F1 · price: This transaction was executed in multiple trades at prices ranging from $86.02 to $86.06. 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: 0001127602-19-017936 · form4.xml · nonDerivative · entry 1

BERTUCCI JOHN R · CIK 0001106180 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,275.429

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.

F3 · balance_after: Adjusted to reflect cash payment in lieu of distribution of a fractional share.

SEC source: 0001127602-19-017931 · form4.xml · nonDerivative · entry 1

Beecher Gregory R · CIK 0001239380 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,123.649

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: 0001127602-19-017922 · form4.xml · nonDerivative · entry 1

Batra Raj · CIK 0001754514 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,094.594

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: 0001127602-19-009446 · form4.xml · nonDerivative · entry 1

Mora Elizabeth · CIK 0001548935 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,037.22

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

SEC source: 0001127602-19-006967 · form4.xml · derivative · entry 13

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,577.63

Underlying: Common Stock · 1,050 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F8 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on February 15, 2019, 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 vest in three equal annual installments commencing on February 15, 2019, 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: 0001127602-19-006967 · form4.xml · derivative · entry 12

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,930.213

Underlying: Common Stock · 1,071 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F7 · derivative.exercise_date: These RSUs are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2019, 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 are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2019, 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: 0001127602-19-006967 · form4.xml · derivative · entry 11

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,627.63

Underlying: Common Stock · 1,477 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F6 · derivative.exercise_date: These RSUs vest in three equal annual installments commencing on February 15, 2018, 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 vest in three equal annual installments commencing on February 15, 2018, 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: 0001127602-19-006967 · form4.xml · derivative · entry 10

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,001.213

Underlying: Common Stock · 1,787 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F5 · derivative.exercise_date: These RSUs are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2018, 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 are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2018, 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: 0001127602-19-006967 · form4.xml · derivative · entry 9

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,104.63

Underlying: Common Stock · 2,007.47 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F1 · price: Each restricted stock unit 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, 2017, 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, 2017, 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: 0001127602-19-006967 · form4.xml · derivative · entry 8

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,788.213

Underlying: Common Stock · 2,609.339 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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

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

F3 · derivative.exercise_date: These RSUs are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2017, 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 are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2017, 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: 0001127602-19-006967 · form4.xml · nonDerivative · entry 7

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,863.599

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

SEC source: 0001127602-19-006967 · form4.xml · nonDerivative · entry 6

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,110.599

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-006967 · form4.xml · nonDerivative · entry 5

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,060.599

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-006967 · form4.xml · nonDerivative · entry 4

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,989.599

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-006967 · form4.xml · nonDerivative · entry 3

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,512.599

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-006967 · form4.xml · nonDerivative · entry 2

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,725.599

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

SEC source: 0001127602-19-006967 · form4.xml · nonDerivative · entry 1

Abrams John R · CIK 0001600505 · Sr. VP, Global Sales

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,718.129

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 represents the contingent right to receive one share of common stock of MKS Instruments, Inc.