Ownership Submission
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FORM 3
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
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OMB APPROVAL
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OMB Number:3235-0104Expires:January 31, 2005Estimated average burden hours per response...0.5
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1. Name and Address of Reporting Person *
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Williams John Edward
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2. Date of Event Requiring Statement (Month/Day/Year)
2024-05-12
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3. Issuer Name and Ticker or Trading Symbol
MKS INSTRUMENTS INC [MKSI]
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(Last)
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(First)
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(Middle)
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C/O MKS INSTRUMENTS, INC. , 2 TECH DRIVE, SUITE 201
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4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
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_____ Director
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_____ 10% Owner
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_____ Officer (give title below)
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_____ Other (specify below)
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EVP & GM, PSD /
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5. If Amendment, Date Original Filed(Month/Day/Year)
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(Street)
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ANDOVER
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MA
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01810
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6. Individual or Join/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
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Table I - Non-Derivative Securities Beneficially Owned
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1.Title of Security
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2. Amount of Securities Beneficially Owned
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3. Ownership Form: Direct (D) or Indirect (I)
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4. Nature of Indirect Beneficial Ownership
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
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1. Title of Derivate Security
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2. Date Exercisable and Expiration Date
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3. Title and Amount of Securities Underlying Derivative Security
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4. Conversion or Exercise Price of Derivative Security
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5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
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6. Nature of Indirect Beneficial Ownership
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Date Exercisable
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Expriation Date
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Title
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Amount or Number of Shares
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Reporting Owners
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Reporting Owner Name / Address
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Relationships
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Director
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10% Owner
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Officer
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Other
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Williams John Edward
C/O MKS INSTRUMENTS, INC.
2 TECH DRIVE, SUITE 201
ANDOVER, MA01810
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EVP & GM, PSD
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Signatures
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/s/ M. Kathryn Rickards, attorney-in-fact
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2024-05-15
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**Signature of Reporting Person
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Date
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Explanation of Responses:
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(*)
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If the form is filed by more than one reporting person, see Instruction 5(b)(v).
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(**)
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Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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(1)
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These restricted stock units (RSUs) were subject to performance criteria, the achievement of which was determined on February 8, 2023, and will vest on February 18, 2025.
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(2)
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Each RSU represents the contingent right to receive one share of common stock of MKS Instruments, Inc.
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(3)
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These RSUs vest on February 18, 2025.
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(4)
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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.
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(5)
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These RSUs vest in two equal annual installments commencing on April 17, 2025, provided that if, in any vesting year, April 17th is not a business day, such vesting shall occur on the next business day.
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Note: File three copies of this Form, one of which must be manually signed. If space is insufficient,
See Instruction 6 for procedure.Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.
