COLELLA GERALD G

SEC source: 0001628280-26-058063 · wk-form4_1787178285.xml · nonDerivative · entry 1

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,936

F1 · shares: Represents shares granted to reporting person under the Columbus McKinnon Corporation 2016 Long Term Incentive Plan as amended and restated effective June 4, 2024, and further amended effective August 14, 2026.

SEC source: 0001049502-26-000094 · form4.xml · nonDerivative · entry 7

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 20,017

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026.

SEC source: 0001049502-26-000094 · form4.xml · nonDerivative · entry 6

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 22,817

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026.

F7 · price: This transaction was executed in multiple trades at prices ranging from $337.00 to $337.73. 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: 0001049502-26-000094 · form4.xml · nonDerivative · entry 5

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 23,030

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026.

F6 · price: his transaction was executed in multiple trades at prices ranging from $335.82 to $336.82. 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: 0001049502-26-000094 · form4.xml · nonDerivative · entry 4

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 24,656

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026.

F5 · price: This transaction was executed in multiple trades at prices ranging from $334.60 to $335.55. 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: 0001049502-26-000094 · form4.xml · nonDerivative · entry 3

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 26,467

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026.

F4 · price: This transaction was executed in multiple trades at prices ranging from $331.98 to $332.44. 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: 0001049502-26-000094 · form4.xml · nonDerivative · entry 2

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 31,343

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026.

F3 · price: This transaction was executed in multiple trades at prices ranging from $330.95 to $331.90. 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: 0001049502-26-000094 · form4.xml · nonDerivative · entry 1

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 39,553

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2026.

F2 · price: This transaction was executed in multiple trades at prices ranging from $329.90 to $330.90. 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: 0001049502-26-000064 · form4.xml · nonDerivative · entry 1

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,998.886

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 Inc.

SEC source: 0001049502-26-000049 · form4.xml · nonDerivative · entry 2

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 40,017

F2 · price: This transaction was executed in multiple trades at prices ranging from $253.470 to $255.250. 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: 0001049502-26-000049 · form4.xml · nonDerivative · entry 1

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 50,017

F1 · price: This transaction was executed in multiple trades at prices ranging from $252.60 to $253.86. 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: 0001005229-25-000194 · wk-form4_1753295494.xml · nonDerivative · entry 1

COLELLA GERALD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,346

F1 · shares: Represents shares granted to reporting person under the Columbus McKinnon Corporation Second Amended and Restated 2016 Long Term Incentive Plan effective June 4, 2024.

SEC source: 0001127602-25-014079 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,216.927

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: 0001127602-25-005627 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Gerald G. Colella 2019 Trust

Disclosed balance after: 60,017

F1 · price: This transaction was executed in multiple trades at prices ranging from $104.37 to $104.68. 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: 0001005229-25-000019 · wk-form4_1739555026.xml · nonDerivative · entry 2

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 5,500

F1 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $20.43 to $20.56, inclusive. The reporting person undertakes to provide to Columbus McKinnon Corporation, any security holder of Columbus McKinnon Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote (1) to this Form 4.

F2 · ownership.nature: Represents shares held by The Gerald G. Colella 2019 Trust, over which the Reporting Person has voting and investment power.

SEC source: 0001005229-24-000220 · wk-form4_1721853885.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,793

F1 · shares: Represents deferred stock units granted to reporting person under the Columbus McKinnon Corporation Second Amended and Restated 2016 Long Term Incentive Plan effective June 4, 2024.

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: 0001127602-24-004369 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

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

Disclosed balance after: 68,017

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 8, 2023.

F2 · price: This transaction was executed in multiple trades at prices ranging from $120.00 to $120.01. 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.

SEC source: 0001127602-24-001884 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

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

Disclosed balance after: 78,017

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 8, 2023.

F2 · price: This transaction was executed in multiple trades at prices ranging from $110.00 to $110.025. 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: 0001127602-23-023506 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Plan reported

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

Disclosed balance after: 88,017

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 8, 2023.

F2 · price: This transaction was executed in multiple trades at prices ranging from $100.00 to $100.11. 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: 0001005229-23-000203 · wk-form4_1690391576.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,279

F1 · shares: Represents shares granted to reporting person under the Columbus McKinnon Corporation 2016 Long Term Incentive Plan as amended and restated June 5, 2019, and further amended effective April 1, 2021.

SEC source: 0001127602-23-015858 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,115.791

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: 0001127602-23-015342 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: No plan indicated

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

Disclosed balance after: 98,017

SEC source: 0001127602-22-020202 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 99,017

SEC source: 0001005229-22-000216 · wf-form4_165885739397921.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,111

F1 · shares: Represents shares granted to reporting person under the Columbus McKinnon Corporation 2016 Long Term Incentive Plan as amended and restated June 5, 2019, and further amended effective April 1, 2021.

SEC source: 0001127602-22-014093 · form4.xml · nonDerivative · entry 2

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 96,870

SEC source: 0001127602-22-014093 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,893.684

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: 0001127602-21-028619 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 97,000

F1 · price: This transaction was executed in multiple trades at prices ranging from $153.03 to $156.95. 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: 0001127602-21-027451 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 100,000

SEC source: 0001127602-21-016399 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,136.636

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: 0001127602-20-030957 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Gerald G. Colella 2018 Grantor Trust

Disclosed balance after: 0

F1 · ownership.nature: The reporting person's 2018 Grantor Trust terminated. On December 8, 2020, 24,934 shares in this trust were transferred to trusts for the reporting person's beneficiaries and the remaining 15,866 shares were distributed to the reporting person and are reported in this Form 4 as indirectly owned by The Gerald G. Colella Living Trust.

SEC source: 0001127602-20-022643 · form4.xml · nonDerivative · entry 1

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

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

Disclosed balance after: 82,596

F1 · price: This transaction was executed in multiple trades at prices ranging from $128.00 to $128.73. 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: 0001127602-20-021105 · form4.xml · derivative · entry 25

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,550.917 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F14 · derivative.exercise_date: These RSUs were awarded on February 15, 2019. These RSUs were scheduled to vest on February 15, 2022.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F14 · derivative.expiration_date: These RSUs were awarded on February 15, 2019. These RSUs were scheduled to vest on February 15, 2022.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 24

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,550.917

Underlying: Common Stock · 7,551.917 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F13 · derivative.exercise_date: These RSUs were awarded on February 15, 2019. These RSUs were scheduled to vest on February 16, 2021.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F13 · derivative.expiration_date: These RSUs were awarded on February 15, 2019. These RSUs were scheduled to vest on February 16, 2021.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 23

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,102.834

Underlying: Common Stock · 7,551.917 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F12 · derivative.exercise_date: These RSUs were awarded on February 15, 2019. These RSUs were scheduled to vest on February 18, 2020.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F12 · derivative.expiration_date: These RSUs were awarded on February 15, 2019. These RSUs were scheduled to vest on February 18, 2020.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 22

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,654.751

Underlying: Common Stock · 7,260.921 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F11 · derivative.exercise_date: These RSUs were awarded on February 15, 2019 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 15, 2022.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F11 · derivative.expiration_date: These RSUs were awarded on February 15, 2019 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 15, 2022.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 21

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,915.672

Underlying: Common Stock · 7,260.921 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F10 · derivative.exercise_date: These RSUs were awarded on February 15, 2019 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 16, 2021.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F10 · derivative.expiration_date: These RSUs were awarded on February 15, 2019 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 16, 2021.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 20

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,176.593

Underlying: Common Stock · 5,037.575 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F9 · derivative.exercise_date: These RSUs were awarded on February 15, 2018. These RSUs were scheduled to vest on February 16, 2021.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F9 · derivative.expiration_date: These RSUs were awarded on February 15, 2018. These RSUs were scheduled to vest on February 16, 2021.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 19

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,214.168

Underlying: Common Stock · 5,038 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F8 · derivative.exercise_date: These RSUs were awarded on February 15, 2018. These RSUs were scheduled to vest on February 18, 2020.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F8 · derivative.expiration_date: These RSUs were awarded on February 15, 2018. These RSUs were scheduled to vest on February 18, 2020.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 18

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,252.168

Underlying: Common Stock · 6,606.066 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F7 · derivative.exercise_date: These RSUs were awarded on February 15, 2018 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 16, 2021.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F7 · derivative.expiration_date: These RSUs were awarded on February 15, 2018 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 16, 2021.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 17

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,858.234

Underlying: Common Stock · 6,607 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F6 · derivative.exercise_date: These RSUs were awarded on February 15, 2018 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 18, 2020.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F6 · derivative.expiration_date: These RSUs were awarded on February 15, 2018 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 18, 2020.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 16

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,465.234

Underlying: Common Stock · 7,085.573 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: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F5 · derivative.exercise_date: These RSUs were awarded on February 15, 2017. These RSUs were scheduled to vest on February 18, 2020.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F5 · derivative.expiration_date: These RSUs were awarded on February 15, 2017. These RSUs were scheduled to vest on February 18, 2020.

SEC source: 0001127602-20-021105 · form4.xml · derivative · entry 15

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,550.807

Underlying: Common Stock · 8,574.454 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 were awarded on February 15, 2017 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 18, 2020.

F4 · derivative.exercise_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

F3 · derivative.expiration_date: These RSUs were awarded on February 15, 2017 and were subject to the achievement of performance criteria determined in the first year of grant. These RSUs were scheduled to vest on February 18, 2020.

F4 · derivative.expiration_date: On January 1, 2020, Mr. Colella retired from the Company and pursuant to the terms of his RSU Agreement, these RSUs fully vested on that date but were not distributable until July 2, 2020 in accordance with Internal Revenue Code Section 409A.

SEC source: 0001127602-20-021105 · form4.xml · nonDerivative · entry 12

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,799.847

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

SEC source: 0001127602-20-021105 · form4.xml · nonDerivative · entry 11

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 78,115.847

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: 0001127602-20-021105 · form4.xml · nonDerivative · entry 10

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,564.93

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: 0001127602-20-021105 · form4.xml · nonDerivative · entry 9

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,013.013

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: 0001127602-20-021105 · form4.xml · nonDerivative · entry 8

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,461.096

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: 0001127602-20-021105 · form4.xml · nonDerivative · entry 7

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,200.175

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: 0001127602-20-021105 · form4.xml · nonDerivative · entry 6

COLELLA GERARD G · CIK 0001256715 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,939.254

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.