MKSI Insider Trading Activity and SEC Form 4 Filings
MKSI insider trading summary
Over the past 12 months, insiders at Mks Inc (MKSI) reported 45 sales worth $43.4M by 13 insiders and no open-market purchases on SEC Form 4. Net insider selling was $43.4M.
Latest MKSI insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Sep 1, 2026 | Elizabeth Mora | Director | Sell | $75K (300 @ $250.96) |
| Aug 14, 2026 | John Tseng-Chung Lee | President & CEO | Sell | $3.0M (10,000 @ $302.01) |
| Aug 3, 2026 | John Edward Williams | EVP & GM, Psd | Sell | $132K (457 @ $288.31) |
| Jun 12, 2026 | James Alan Schreiner | EVP & COO | Sell | $75K (217 @ $347.00) |
| Jun 12, 2026 | James Alan Schreiner | EVP & COO | Sell | $854K (2,471 @ $345.52) |
| Jun 12, 2026 | James Alan Schreiner | EVP & COO | Sell | $281K (812 @ $346.41) |
| Jun 10, 2026 | James Alan Schreiner | EVP & COO | Sell | $248K (781 @ $317.42) |
| Jun 5, 2026 | Michelle M McCarthy | SVP & Chief Accounting Officer | Sell | $767K (2,434 @ $315.23) |
| Jun 1, 2026 | David Philip Henry | EVP, Global Str Mktg & GM, MSD | Sell | $1.9M (6,000 @ $314.43) |
| Jun 1, 2026 | Elizabeth Mora | Director | Sell | $95K (300 @ $318.02) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.