Form 4 for MKSI MKS INC
Accepted 2026-02-23 00:00:00 ET · period of report 2026-02-20 · accession 0001049502-26-000038 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 2026-02-23 | 2026-02-20 | MKSI | McCarthy Michelle M | VP, CAO | S - Sale | $250.00 | -1,466 | 816 | -64% | -$366.5K |
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 | 2026-02-20 | S | D | 816 | $250.35 | 0 | D | — | — | (F2) This transaction was executed in multiple trades at prices ranging from $250.160 to $250.790. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected. |
| 2 | Common | Common Stock | 2026-02-20 | S | D | 650 | $249.57 | 816 | D | — | — | (F1) This transaction was executed in multiple trades at prices ranging from $249.070 to $250.030. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected. |