Form 4 for MKSI MKS INC
Accepted 2025-11-18 00:00:00 ET · period of report 2025-11-17 · accession 0001049502-25-000039 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-11-18 | 2025-11-17 | MKSI | Mayampurath Ramakumar | EVP, CFO | F - Tax | $142.74 | -2,628 | 5,667 | -32% | -$375.1K |
| D | 2025-11-18 | 2025-11-17 | MKSI | Mayampurath Ramakumar | EVP, CFO | M - OptEx | — | +8,295 | 8,295 | New | — |
| D | 2025-11-18 | 2025-11-17 | MKSI | Mayampurath Ramakumar | EVP, CFO | M - OptEx | — | -8,295 | 16.4K | -34% | — |
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 | 2025-11-17 | F | D | 2,628 | $142.74 | 5,667 | D | — | — | |
| 2 | Common | Common Stock | 2025-11-17 | M | A | 8,295 | — | 8,295 | D | — | — | (F1) Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Inc. |
| 3 | Derivative | Restricted Stock Unit | 2025-11-17 | M | D | 8,295 | — | 16,402.39 | D | — · — to — | 8,295 Common Stock | (F1) Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Inc. (F3) These RSUs vest in two equal annual installments commencing on November 15, 2025, provided that if, in any vesting year, November 15th is not a business day, such vesting shall occur on the next business day. |