Form4insider filings, from the source

Insider · CIK 0001797189

James Alan Schreiner

Files at: MKSI. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $1.5M · 2net −$1.5M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesJun 9Jun 9Jun 10Jun 11Jun 11Jun 12Jun 13

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Jun 12, 2026 SForm 4 →Jun 16, 5:35 pm EDTMKS INCMKSI3,500$345.82$1,210,37019,201−15.4%
Jun 10, 2026 SForm 4 →Jun 11, 10:40 am EDTMKS INCMKSI781$317.42$247,90522,701−3.33%10b5-1

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.