MKS INC — Director's Dealing 2021

Feb 9, 2021

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2021-02-08

Reporting Person: Gitin Mark Milton (SVP & GM, L&M Division)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	4337.302	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Restricted Stock Unit	$		Common Stock (712.752)		Direct
Restricted Stock Unit	$		Common Stock (2283.439)		Direct
Restricted Stock Unit	$		Common Stock (5391.417)		Direct

Footnotes

F1: These restricted stock units (RSUs) vest on April 13, 2021.

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

F3: These RSUs vest on January 11, 2022.

F4: These RSUs vest in three equal annual installments commencing on April 17, 2021, provided that if, in any vesting year, April 17th is not a business day, such vesting shall occur on the next business day.