Burke Kathleen Flaherty 4
4 · MKS INC · Filed Nov 4, 2025
Insider Transaction Report
Form 4
MKS INCMKSI
Burke Kathleen Flaherty
EVP, GC & Secretary
Transactions
- Exercise/Conversion
Common Stock
2025-10-31+82→ 51,366.509 total - Exercise/Conversion
Restricted Stock Unit
2025-10-31−158→ 17,617.737 total→ Common Stock (158 underlying) - Exercise/Conversion
Common Stock
2025-10-31+341→ 51,851.509 total - Tax Payment
Common Stock
2025-10-31$143.71/sh−777$111,663→ 51,074.509 total - Exercise/Conversion
Restricted Stock Unit
2025-10-31−52→ 17,565.737 total→ Common Stock (52 underlying) - Exercise/Conversion
Common Stock
2025-10-31+144→ 51,510.509 total - Exercise/Conversion
Common Stock
2025-10-31+158→ 51,232.509 total - Exercise/Conversion
Restricted Stock Unit
2025-10-31−82→ 17,483.737 total→ Common Stock (82 underlying) - Exercise/Conversion
Restricted Stock Unit
2025-10-31−341→ 16,998.737 total→ Common Stock (341 underlying) - Exercise/Conversion
Common Stock
2025-10-31+52→ 51,284.509 total - Exercise/Conversion
Restricted Stock Unit
2025-10-31−144→ 17,339.737 total→ Common Stock (144 underlying)
Footnotes (5)
- [F1]Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Inc.
- [F2]Shares used to satisfy FICA taxes.
- [F3]Portion of 2023 RSU Award accelerated to satisfy FICA taxes.
- [F4]Portion of 2024 RSU Award accelerated to satisfy FICA taxes.
- [F5]Portion of 2025 RSU Award accelerated to satisfy FICA taxes.