Company · CIK 0001049502 · SIC 3823 — Industrial Instruments For Measurement, Display, and Control · Nasdaq
MKS INC · MKSI
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 1, 2026 SForm 4 → | Sep 2, 12:34 pm EDT | Elizabeth MoraDirector | 300 | $250.96 | $75,288 | 18,845 | −1.57% | 10b5-1 |
| Aug 14, 2026 SForm 4 → | Aug 17, 10:11 am EDT | John Tseng-Chung LeePresident & CEO, Director | 10,000 | $302.01 | $3,020,100 | 134,776 | −6.91% | 10b5-1 |
| Aug 3, 2026 SForm 4 → | Aug 4, 12:21 pm EDT | John Edward WilliamsEVP & GM, PSD | 457 | $288.31 | $131,758 | 4,098 | −10.0% | 10b5-1 |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 17, 2026 AForm 4 → | Aug 18, 2:07 pm EDT | Renee Martel DonlanEVP, GC & CCO | 954 | — | — | 4,781 | — |