MKS Inc (MKSI) insider trading
Every open-market stock purchase and sale by MKS Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- John Tseng-Chung Lee (CEO) and 2 others sold $3.2M in the last 90 days.
- Last insider buy: David Philip Henry (VP), $171K, 2 years ago.
- Congress: Lisa McClain sold $1K to $15K, 11 months ago.
Last 12 months: insiders bought $0 (0 buys) and sold $43.5M (33 sales). Last close $249.65 on Sep 3, 2026.
Recent MKSI insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Sep 1, 2026 | Elizabeth Mora (Director) | Sold | $75.3K |
| Aug 17, 2026 | Renee Martel Donlan (C-suite exec) | Bought (not open market) | — |
| Aug 14, 2026 | John Tseng-Chung Lee (CEO) | Sold | $3M |
| Aug 3, 2026 | John Edward Williams (VP) | Sold | $132K |
| Jun 12, 2026 | James Alan Schreiner (COO) | Sold | $854K |
| Jun 12, 2026 | James Alan Schreiner (COO) | Sold | $281K |
| Jun 12, 2026 | James Alan Schreiner (COO) | Sold | $75.3K |
| Jun 10, 2026 | James Alan Schreiner (COO) | Sold | $248K |
| Jun 5, 2026 | Michelle M McCarthy (C-suite exec) | Sold | $767K |
| Jun 1, 2026 | David Philip Henry (VP) | Sold | $1.9M |
| Jun 1, 2026 | Elizabeth Mora (Director) | Sold | $95.4K |
| May 27, 2026 | Gerald G Colella (Director) | Sold | $2.7M |
| May 27, 2026 | Gerald G Colella (Director) | Sold | $1.6M |
| May 27, 2026 | Gerald G Colella (Director) | Sold | $948K |
| May 27, 2026 | Joseph B Donahue (Director) | Sold | $689K |
| May 27, 2026 | Gerald G Colella (Director) | Sold | $608K |
| May 27, 2026 | Gerald G Colella (Director) | Sold | $547K |
| May 27, 2026 | Gerald G Colella (Director) | Sold | $153K |
| May 27, 2026 | Gerald G Colella (Director) | Sold | $71.8K |
| May 26, 2026 | David Philip Henry (VP) | Sold | $826K |
| May 22, 2026 | John Tseng-Chung Lee (CEO) | Sold | $3.2M |
| May 22, 2026 | Ramakumar Mayampurath (CFO) | Sold | $2.8M |
| May 18, 2026 | Peter Cannone III (Director) | Sold | $410K |
| May 14, 2026 | Jacqueline F Moloney (Director) | Sold | $312K |
| May 13, 2026 | Jacqueline F Moloney (Director) | Sold | $447K |
Who's trading MKSI
- Elizabeth Mora, Director: sold $290K (4 sales), last Sep 1, 2026
- Renee Martel Donlan, C-suite exec: other filings, last Aug 17, 2026
- John Tseng-Chung Lee, CEO: sold $13.9M (6 sales), last Aug 14, 2026
- John Edward Williams, VP: sold $656K (2 sales), last Aug 3, 2026
- James Alan Schreiner, COO: sold $2.6M (6 sales), last Jun 12, 2026
- Michelle M McCarthy, C-suite exec: sold $1.1M (3 sales), last Jun 5, 2026
- David Philip Henry, VP: sold $3.2M (3 sales), last Jun 1, 2026
- Joseph B Donahue, Director: sold $689K (1 sale), last May 27, 2026
- Gerald G Colella, Director: sold $11.7M (9 sales), last May 27, 2026
- Ramakumar Mayampurath, CFO: sold $2.8M (1 sale), last May 22, 2026
- Peter Cannone III, Director: sold $732K (2 sales), last May 18, 2026
- Jacqueline F Moloney, Director: sold $1M (4 sales), last May 14, 2026
- Wissam G Jabre, Director: other filings, last May 11, 2026
- Raj Batra, Director: other filings, last May 11, 2026
- Kathleen Flaherty Burke, VP: sold $2.5M (2 sales), last May 11, 2026
Get free alerts when an insider at MKS Inc files a new trade →