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$ Value

Shares

158

Price

Filed

Nov 4

Insider

Name

Burke Kathleen Flaherty

Title

EVP, GC & Secretary

CIK

0001775435

Roles

Officer

Transaction Details

Transaction Date

2025-10-31

Code

M

Table

Derivative

Ownership

Direct

Equity Swap

No

Shares After

17,618

Footnotes

Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Inc. | Shares used to satisfy FICA taxes. | Portion of 2023 RSU Award accelerated to satisfy FICA taxes. | Portion of 2024 RSU Award accelerated to satisfy FICA taxes. | Portion of 2025 RSU Award accelerated to satisfy FICA taxes.

Filing Info

Accession No.

0001049502-25-000037

Form Type

4

Issuer CIK

0001049502

Burke Kathleen Flaherty's History

Date Ticker Type Value
2026-02-20 MKSI $1.1M
2026-02-17 MKSI M
2026-02-17 MKSI M
2026-02-17 MKSI M
2026-02-17 MKSI M
2026-02-17 MKSI M
2026-02-17 MKSI M
2026-02-17 MKSI F $1.4M
2026-02-17 MKSI A
2026-02-17 MKSI M

Other Insiders at MKSI (90d)

Insider Bought Sold Last
COLELLA GERALD G $5.1M 2026-02-24
CANNONE PETER III $323K 2026-02-20
Lee John Tseng-Chung
President & CEO
$7.7M 2026-02-20
Moloney Jacqueline F $278K 2026-03-12
Mora Elizabeth $72K 2026-03-02
Williams John Edward
EVP & GM, PSD
$524K 2026-04-17
McCarthy Michelle M
SVP & Chief Accounting Officer
2026-04-15
McCarthy Michelle M
VP & Chief Accounting Officer
$367K 2026-02-20
Burke Kathleen Flaherty
EVP, GC & Secretary
$1.1M 2026-02-20
Schreiner James Alan
EVP & COO
$1.0M 2026-02-24
Taranto Eric Robert
EVP & GM, VSD
$1.4M 2026-03-06
Henry David Philip
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$523K 2026-02-20
Mayampurath Ramakumar
EVP & CFO
2026-02-17