| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Insider activity in MKSI over the last quarter tilts toward selling: insiders offloaded a net 10,757 shares worth roughly $3.2M.
MKSI sits in the Electronic Equipment, Instruments & Components industry within the Information Technology sector, so this activity is best read against the sector's broader insider trend.
| Role | Insider | Shares | Value | 30d |
|---|---|---|---|---|
| CEO | 134.8K | $40.70M | - | |
| VP | 49.4K | $15.82M | - | |
| Dir | 20.0K | $6.78M | - | |
| COO | 19.2K | $6.63M | - | |
| Dir | 18.8K | $4.73M | - |
Buys and sells only
| Date | Insider | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| May 26, 2026 | Henry David Philip54 | EVP, Global Str Mktg &Gm, Msd | Sell10b5-1 | 2,500 | $330.50 | $826,250.00 | -13.3% | -19.5% | - | |
| May 22, 2026 | Lee John Tseng-Chung | President &CEO | Sell10b5-1 | 10,000 | $315.48 | $3,154,800.00 | -6.5% | -12.1% | - | |
| May 22, 2026 | Mayampurath Ramakumar | EVP &CFO | Sell10b5-1 | 8,810 | $315.48 | $2,779,378.80 | -100.0% | -12.1% | - | |
| May 18, 2026 | Cannone Peter III | Director | Sell | 1,350 | $303.40 | $409,590.14 | -14.8% | +8.5% | - | |
| May 14, 2026 | Moloney Jacqueline F51 | Director | Sell | 1,000 | $312.20 | $312,196.90 | -10.2% | -2.2% | - | |
| May 13, 2026 | Moloney Jacqueline F51 | Director | Sell | 1,400 | $318.99 | $446,586.00 | -12.5% | -7.2% | - | |
| May 11, 2026 | Taranto Eric Robert60 | EVP &Gm, Vsd | Sell | 2,849 | $319.93 | $911,327.64 | -18.4% | -8.6% | - | |
| May 11, 2026 | Burke Kathleen Flaherty46 | EVP, GC &Secretary | Sell | 4,355 | $319.94 | $1,393,316.93 | -8.1% | -8.6% | - | |
| Mar 12, 2026 | Moloney Jacqueline F51 | Director | Sell | 340 | $213.77 | $72,705.25 | -3.2% | +48.0% | - | |
| Mar 6, 2026 | Taranto Eric Robert60 | EVP &Gm, Vsd | Sell | 4,568 | $220.52 | $1,007,317.81 | -22.8% | +57.3% | - |