Type	Name	Date
Credit agreement	First Amendment to Credit Agreement, by and among MKS Instruments, Inc., as parent borrower, the other loan parties party thereto, JPMorgan Chase Bank, N.A., as administrative agent, and each lender party thereto	10/03/2023
Credit agreement	Credit Agreement, by and among MKS Instruments, Inc., the lenders and letter of credit issuers party thereto and JPMorgan Chase Bank, N.A., as administrative agent and collateral agent	08/17/2022
Credit agreement	Amendment No. 7 to Term Loan Credit Agreement, by and among the Company, the other loan parties party thereto, each lender party thereto and Barclays Bank PLC, as administrative agent	05/10/2021
Credit agreement	Amendment No. 2 to ABL Credit Agreement, by and among the Company, the other loan parties party thereto, each lender party thereto and Barclays Bank PLC, as administrative agent	05/10/2021
Credit agreement	Amendment No. 6 to Term Loan Credit Agreement, among the Company, the other loan parties party thereto, Barclays Bank PLC, as administrative agent, collateral agent and fronting bank, and each participating lender party thereto	10/01/2019
Credit agreement	ABL Credit Agreement, by and among the Company, Barclays Bank PLC, as administrative agent and collateral agent, the other borrowers from time to time party thereto, and the lenders and letters of credit issuers from time to time party thereto	02/01/2019
Credit agreement	Amendment No. 4 to Term Loan Credit Agreement, among the Company, the other loan parties party thereto, Barclays Bank PLC, as administrative agent and collateral agent, and each participating lender party thereto	04/12/2018
Credit agreement	Amendment No. 3 to Term Loan Credit Agreement, among the Company, the other loan parties party thereto, Barclays Bank PLC, as administrative agent and collateral agent, and each participating lender party thereto	07/06/2017
Credit agreement	Amendment No. 2 to Term Loan Credit Agreement, among the Company, the other loan parties party thereto, Barclays Bank PLC, as administrative agent and collateral agent, and each participating lender party thereto	12/14/2016
Credit agreement	Amendment No. 1 to Term Loan Credit Agreement, among the Company, the other loan parties party thereto, Barclays Bank PLC, as administrative agent and collateral agent, and each participating lender party thereto	06/09/2016
Credit agreement	Term Loan Credit Agreement, by and among the Company, Barclays Bank PLC, as administrative agent and collateral agent, and the lenders from time to time party thereto	04/29/2016
Credit agreement	ABL Credit Agreement, by and among the Company, Deutsche Bank AG New York Branch, as administrative agent and collateral agent, the other borrowers from time to time party thereto, and the lenders and letters of credit issuers from time to time party thereto	04/29/2016

Type	Name	Date
By-Laws	Amended and Restated By-Laws	05/06/2014

Type	Name	Date
Employment agreement	Amendment to Employment Agreement, by and between MKS Instruments, Inc. and James A. Schreiner	10/29/2021
Employment agreement	Employment Agreement, between John Lee and the Registrant	11/20/2019
Equity incentive plans	2014 Stock Incentive Plan	05/06/2014
Separation agreement	Separation Agreement between the Company and Leo Berlinghieri	10/24/2013
Employment agreement	Employment Agreement between the Company and Gerald G. Colella	10/24/2013

Type	Name	Date
Merger agreement	Agreement and Plan of Merger, by and among the Company, Merger Sub and ESI	10/30/2018

Type	Name	Date
Other	Letter Agreement between Registrant and Robert J. Phillippy	05/02/2016