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MKS INC Director's Dealing 2024

May 15, 2024

30723_dirs_2024-05-15_c867c1e3-c3fc-4f08-9acd-40a60597a727.zip

Director's Dealing

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SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2024-05-12

Reporting Person: Williams John Edward (EVP & GM, PSD)

Holdings (Non-Derivative)

Security Shares Ownership
Common Stock 1174 Direct

Holdings (Derivative)

Security Exercise Price Expiration Underlying Shares Ownership
Restricted Stock Unit $ Common Stock (914.903) Direct
Restricted Stock Unit $ Common Stock (658.031) Direct
Restricted Stock Unit $ Common Stock (1893.285) Direct
Restricted Stock Unit $ Common Stock (3480.714) Direct

Footnotes

F1: 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.

F2: Each RSU represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F3: These RSUs vest on February 18, 2025.

F4: 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.

F5: 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.