Form 4 for MKSI MKS INC
Accepted 2026-08-17 10:11:54 ET · period of report 2026-08-14 · accession 0001049502-26-000113 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T | 2026-08-17 10:11 | 2026-08-14 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | S - Sale | $302.01 | -10.0K | 134.8K | -7% | -$3.02M |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-08-14 | S | D | 10,000 | $302.01 | 134,776.27 | D | — | — | (F1) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 20, 2026. |