MKS (MKSI) insider trading
16 directors and officers declare holding shares of MKS (MKSI), each in their own filing with the SEC. The largest is John Tseng-Chung Lee (President & CEO · Director) with 134,776 shares, 0.20% of the company, worth $35.6M at the last close. The most recent move on file: Elizabeth Mora sold 300 shares at $250.96 on Sep 1, 2026. Of the 15 with a trade on file, 2 last bought and 13 last sold. Purchases and sales are as reported on Forms 3, 4 and 5 — the SEC counts private transactions too, and many large sales follow a plan arranged in advance. Holdings are never added up: two spouses often report the same shares, and a joint filing carries a fund's.
| Insider | Role | Shares | % of company | Value | Last trade on file | Filed |
|---|---|---|---|---|---|---|
| John Tseng-Chung Lee | President & CEO · Director | 134,776 | 0.20% | $35.6M | sold 10,000 shares at $302.01 on Aug 14, 2026 | Aug 14, 2026 |
| Kathleen Flaherty Burke | EVP, GC & Secretary | 49,439 | 0.07% | $13.1M | sold 4,355 shares at $319.94 on May 11, 2026 | May 11, 2026 |
| Gerald G. Colella | Director | 29,016 | 0.04% | $7.7M | sold 20,000 shares at $330.38 on May 27, 2026 | May 27, 2026 |
| James Alan Schreiner | EVP & COO | 19,201 | 0.03% | $5.1M | sold 3,500 shares at $345.52 on Jun 12, 2026 | Jun 12, 2026 |
| Elizabeth Mora | Director | 18,845 | 0.03% | $5.0M | sold 300 shares at $250.96 on Sep 1, 2026 | Sep 1, 2026 |
| Raj Batra | Director | 16,227 | 0.02% | $4.3M | bought 782 shares on May 11, 2026 | May 11, 2026 |
| Eric Robert Taranto | EVP & GM, VSD | 12,596 | 0.02% | $3.3M | sold 2,849 shares at $319.93 on May 11, 2026 | May 11, 2026 |
| David Philip Henry | EVP, Global Str Mktg & GM, MSD | 10,422 | 0.02% | $2.8M | sold 6,000 shares at $314.43 on Jun 1, 2026 | Jun 1, 2026 |
| Joseph B. Donahue | Director | 10,033 | 0.01% | $2.7M | sold 2,100 shares at $327.95 on May 27, 2026 | May 27, 2026 |
| Renee Martel Donlan | EVP, GC & CCO | 9,472 | 0.01% | $2.5M | — | Jun 1, 2026 |
| Jacqueline F. Moloney | Director | 8,775 | 0.01% | $2.3M | sold 1,000 shares at $312.20 on May 14, 2026 | May 14, 2026 |
| Peter Cannone III | Director | 7,794 | 0.01% | $2.1M | sold 1,350 shares at $303.40 on May 18, 2026 | May 18, 2026 |
| Wissam G. Jabre | Director | 5,270 | <0.01% | $1.4M | bought 782 shares on May 11, 2026 | May 11, 2026 |
| John Edward Williams | EVP & GM, PSD | 4,098 | <0.01% | $1.1M | sold 457 shares at $288.31 on Aug 3, 2026 | Aug 3, 2026 |
| Michelle M. McCarthy | SVP & Chief Accounting Officer | 2 | <0.01% | $409.87 | sold 2,434 shares at $315.23 on Jun 5, 2026 | Jun 5, 2026 |
| Ramakumar Mayampurath | EVP & CFO | 1 | <0.01% | $301.45 | sold 8,810 shares at $315.48 on May 22, 2026 | May 22, 2026 |
Each insider at MKS
- John Tseng-Chung Lee — President & CEO · Director
- Kathleen Flaherty Burke — EVP, GC & Secretary
- Gerald G. Colella — Director
- James Alan Schreiner — EVP & COO
- Elizabeth Mora — Director
- Raj Batra — Director
- Eric Robert Taranto — EVP & GM, VSD
- David Philip Henry — EVP, Global Str Mktg & GM, MSD
- Joseph B. Donahue — Director
- Renee Martel Donlan — EVP, GC & CCO
- Jacqueline F. Moloney — Director
- Peter Cannone III — Director
What insiders bought and sold across AI stocks · All filings on sec.gov