SEC Form 4 · accession 0001049502-26-000113
MKS INC · MKSI
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
John Tseng-Chung Lee
Officer — President & CEO · Director
Period of report
Aug 14, 2026
Accepted (ET)
Aug 17, 2026 · 10:11 am EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001049502
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Aug 14, 2026 | S | 10,000 | $302.01 | D | 134,776 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 20, 2026.