James Alan Schreiner is COO & VP at MKS INSTRUMENTS INC (MKSI). They have made 2 open-market trades across 1 company since 2025, most recently 2026-06-12.
CIK 0001797189
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 2 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MKSI | 19,201 | $4.1M |
Shares reported on the most recent Form 4, priced at the 2026-06-16 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MKSI | SELL | 2026-06-12 | 2026-06-16 | $345.82 | $1.2M | +8.8% | -13.4% | -37.4% |
| MKSI | SELL · 10b5-1 | 2026-06-10 | 2026-06-11 | $317.42 | $248K | +11.3% | +2.5% | -21.9% |
| MKSI | SELL | 2026-02-24 | 2026-02-25 | $255.00 | $1.0M | -14.4% | -12.5% | +31.0% |
| MKSI | SELL · 10b5-1 | 2025-10-22 | 2025-10-23 | $138.68 | $197K | -4.1% | +4.9% | +54.4% |
| MKSI | SELL · 10b5-1 | 2025-09-18 | 2025-09-19 | $124.00 | $104K | +1.9% | +9.9% | +21.9% |
| MKSI | SELL · 10b5-1 | 2025-07-07 | 2025-07-08 | $102.44 | $196K | +0.5% | -5.2% | +33.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.