Transaction #4377 · Form 4 · 0001049502-25-000035
MKS INC · Exercise / conversion · Common Stock
MKS INC · Transacted October 31, 2025 · Filed November 4, 2025
What does this filing report?
An SEC Form 4 filing for MKS INC records an exercise / conversion involving Common Stock on October 31, 2025. The reported quantity was 352. The filing date is November 4, 2025. This is one transaction record; amounts are not allocated among any joint reporting owners.
The acquisition category describes how securities were received. It does not by itself establish a cash purchase of common stock. Read the transaction code definitionsand the original filing before interpreting the amounts.
Transaction details
- Company
- MKS INC
- Company CIK
- 0001049502
- Security type
- Non-derivative
- Acquisition type
- Exercise / conversion · Code M
- Quantity acquired
- 352
- Reported price
- Not reported · See footnotes
- Reference value
- Not reported
- Currency
- Currency not specified
- Ownership
- Direct
- Holdings after transaction
- 147,621.5227
- Ownership description
- Not reported
- SEC acceptance time
- Nov 4, 2025, 4:58 PM EST
- 10b5-1 indication
- Not indicated
Reference value is reported quantity × reported price. It is not a confirmed cash payment or an estimate of a derivative's economic value. A missing currency is not assumed to be USD.
Reporting owners
- Lee John Tseng-Chung ↗
President & CEO · Director
CIK 0001414656
These are the reporting owners named in the filing. Quantities and amounts are not allocated among co-reporters. Roles reflect this filing, not a current profile.
Company listings
The linked listing is identified separately from other current company listings.
Filing footnotes & remarks
- F1
- Each restricted stock unit (RSU) represents the contingent right to receive one share of common stock of MKS Inc.
- F2
- Shares used to satisfy FICA taxes.
- F3
- Portion of 2024 RSU Award accelerated to satisfy FICA taxes.
- F4
- Portion of 2025 RSU Award accelerated to satisfy FICA taxes.
Footnotes are reproduced as plain text from the current source filing. For the full context, read the original SEC filing.
This record was updated Eastern Time. This is the stored record update time, not the transaction date. Report a correction.