MKS INSTRUMENTS INC (MKSI) has 480 open-market insider trades by 41 insiders since 2006. Over the last six months insiders net sold $7.3M. The most active filer is John R. Bertucci, Director.
| Name | Title | Tier | Trades | Value | Last Trade |
|---|---|---|---|---|---|
| Carlyle Partners VI Cayman Holdings, L.P. | 10% Owner | — | 1 | $172.3M | 2023-05-08 |
| John R. Bertucci | Dir | — | 47 | $86.2M | 2019-05-08 |
| Claire R. Bertucci | — | — | 44 | $73.5M | 2008-05-01 |
| Electric Co Emerson | 10% | — | 47 | $62.1M | 2006-09-20 |
| America Inc Astec | 10% | — | 23 | $28.4M | 2006-07-06 |
| Seth H. Bagshaw | CFOVPTreasurer | — | 22 | $22.5M | 2024-02-22 |
| Gerard G. Colella | Dir | — | 39 | $16.8M | 2025-05-12 |
| John Tseng-Chung Lee | CEOPres | — | 20 | $15.9M | 2026-08-14 |
| Leo Berlinghieri | — | — | 13 | $11.9M | 2013-12-30 |
| Kathleen Flaherty Burke | VPSecretary | — | 5 | $8.9M | 2026-05-11 |
| Insider | Title | Type | Value | Date |
|---|---|---|---|---|
| Elizabeth Mora | Director | Sell | $75K | 2026-09-01 |
| John Tseng-Chung Lee | CEO & President | Sell | $3.0M | 2026-08-14 |
| John Edward Williams | VP | Sell | $132K | 2026-08-03 |
| James Alan Schreiner | COO & VP | Sell | $1.2M | 2026-06-12 |
| James Alan Schreiner | COO & VP | Sell | $248K | 2026-06-10 |
| Elizabeth Mora | Director | Sell | $95K |
Companies that share insiders with MKSI, and sector peers with recent insider buying. Related by who files, not by how the stocks move.
| 2026-06-01 |
| David Philip Henry | VP | Sell | $1.9M | 2026-06-01 |
| Gerald G. Colella | Director | Sell | $6.7M | 2026-05-27 |
| Joseph B. Donahue | Director | Sell | $689K | 2026-05-27 |
| David Philip Henry | VP | Sell | $826K | 2026-05-26 |
| Ramakumar Mayampurath | CFO & VP | Sell | $2.8M | 2026-05-22 |
| John Tseng-Chung Lee | CEO & President | Sell | $3.2M | 2026-05-22 |
| Peter Cannone III | Director | Sell | $410K | 2026-05-18 |
| Jacqueline F. Moloney | Director | Sell | $312K | 2026-05-14 |
| Jacqueline F. Moloney | Director | Sell | $447K | 2026-05-13 |