SEC Form 4 research
| Issuer | MKS INSTRUMENTS INC |
|---|---|
| Tickers | MKSI |
| Reporting owners | 64 |
| Officers and directors | 24 |
| Last public filing | 2026-09-03 |
| Available | Trade date | Reporting owners | Code | Shares | Price | Reported value |
|---|---|---|---|---|---|---|
| 2026-09-02 | 2026-09-01 | Mora Elizabeth | S | 300 | $250.96 | Not reported |
| 2026-08-18 | 2026-08-17 | Donlan Renee Martel | A | 954.04 | Not reported | Not reported |
| 2026-08-17 | 2026-08-14 | Lee John Tseng-Chung | S | 10,000 | $302.01 | Not reported |
| 2026-08-04 | 2026-08-03 | Williams John Edward | S | 457 | $288.31 | Not reported |
Public filing evidence only. NexusTrade's simulated follower strategies are hypothetical, modeled results — not live trading returns and not investment advice.