Arkolith/Insider Trading/MKSI/Form 4

Lee John Tseng-Chung

President & CEO, DirectorMKS INC (MKSI) · full profile →Form 4 · filed Feb 23, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$7.7M
Net Open-Market Flow
-$7.7M
Transactions
4
4 non-derivative · 0 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Feb 20, 2026Sell(S)2K$257.81$513K157K
Feb 20, 2026Sell(S)2K$259.70$491K155K
Feb 20, 2026Sell(S)13K$256.93$3.3M159K
Feb 20, 2026Sell(S)13K$256.05$3.4M171K

Transaction Codes

S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001049502-26-000030) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML