Arkolith/Insider Trading/MKSI/Form 4

Lee John Tseng-Chung

President & CEO, DirectorMKS INC (MKSI) · full profile →Form 4 · filed Feb 18, 2026
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
14
7 non-derivative · 7 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Feb 17, 2026Option exercise(M)8K——177K
Feb 17, 2026Option exercise(M)22K——169K
Feb 17, 2026Option exercise(M)4K——181K
Feb 17, 2026Option exercise(M)7K——188K
Feb 17, 2026Tax withholding(F)33K$260.74$8.5M185K
Feb 17, 2026Option exercise(M)12K——217K
Feb 17, 2026Option exercise(M)17K——205K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Feb 17, 2026Option exercise(M)7K——114K
Feb 17, 2026Option exercise(M)12K——85K
Feb 17, 2026Option exercise(M)17K——97K
Feb 17, 2026Option exercise(M)4K——121K
Feb 17, 2026Grant(A)16K——155K
Feb 17, 2026Option exercise(M)22K——133K
Feb 17, 2026Option exercise(M)8K——125K

Transaction Codes

M
Option exercise / conversion
F
Shares withheld for taxes
A
Grant / award

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001049502-26-000016) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML