Form 4 for MKSI MKS INC
Accepted 2026-05-26 14:15:39 ET · period of report 2026-05-22 · accession 0001049502-26-000088 · 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 | 2026-05-26 14:15 | 2026-05-22 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | S - Sale | $315.48 | -10.0K | 144.7K | -6% | -$3.15M |
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 | 2026-05-22 | S | D | 10,000 | $315.48 | 144,696.11 | D | — | — | (F1) This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 20, 2026. |