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McCarthy Michelle M – ‘3’ for 3/4/24 re: MKS Instruments Inc.

On:  Thursday, 3/7/24, at 10:51am ET   ·   For:  3/4/24   ·   As:  Officer   ·   Accession #:  1127602-24-8953   ·   File #:  0-23621

Previous ‘3’:  ‘3’ on 2/26/18 for 2/20/18   ·   Latest ‘3’:  This Filing

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 3/07/24  McCarthy Michelle M               3          Officer     2:6K   MKS Instruments Inc.              Computershare Inc.

Initial Statement of Beneficial Ownership of Securities by an Insider   —   Form 3   —   SEA’34

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 3           Initial Statement of Beneficial Ownership of        HTML      4K 
                Securities by an Insider -- form3.xml/2.6                        
 2: EX-24       Power of Attorney (Public): McCarthymichellempoa       2±     7K

‘3’   —   Initial Statement of Beneficial Ownership of Securities by an Insider — form3.xml/2.6



        

This ‘3’ Document is an XML Data File that may be rendered in various formats:

  Form 3    –   Plain Text   –  SEC Website  –  EDGAR System  –    XML Data    –  <?xml?> File
 
 
Plain Text rendering:  Initial Statement of Beneficial Ownership of Securities by an Insider
 
                                                                                                                                                                                
Ownership Document
 
Schema Version:  X0206
Document Type:  3
Period of Report:  3/4/24
No Securities Owned:  1
Issuer:
Issuer CIK:  1049502
Issuer Name:  MKS INSTRUMENTS INC
Issuer Trading Symbol:  MKSI
Reporting Owner:
Reporting Owner ID:
Owner CIK:  1732461
Owner Name:  McCarthy Michelle M
Reporting Owner Address:
Owner Street 1:  C/O MKS INSTRUMENTS, INC.
Owner Street 2:  2 TECH DRIVE, SUITE 201
Owner City:  ANDOVER
Owner State:  MA
Owner ZIP Code:  01810
Owner State Description:
Reporting Owner Relationship:
Is Officer?  Yes
Officer Title:  VP & Chief Accounting Officer
Footnotes:
Remarks:  Exhibit 24 - Power of Attorney
Owner Signature:
Signature Name:  /s/ M. Kathryn Rickards, attorney-in-fact
Signature Date:  3/7/24


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Filing Submission 0001127602-24-008953   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)
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