William D. Stewart is VP/GM & Vacuum Products at MKS INSTRUMENTS INC (MKSI). They have made 16 open-market trades across 1 company since 2006, most recently 2012-04-02.
CIK 0001202731
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 16 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MKSI | 12,841 | $2.8M |
Shares reported on the most recent Form 4, priced at the 2012-04-03 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MKSI | SELL | 2012-02-13 | 2012-02-14 | $31.98 | $6K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2011-08-09 | 2011-08-10 | $22.47 | $193K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2011-02-10 | 2011-02-11 | $30.00 | $720K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL · 10b5-1 | 2010-03-25 | 2010-03-29 | $19.50 | $174K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2009-08-03 | 2009-08-04 | $19.60 | $253K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2009-03-02 | 2009-03-04 | $11.89 | $14K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2008-05-19 | 2008-05-20 | $25.64 | $192K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2008-05-19 | 2009-02-18 | $25.72 | $80K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-06-11 | 2007-06-12 | $27.40 | $4K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-06-04 | 2007-06-06 | $27.40 | $204K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-06-01 | 2007-06-06 | $27.42 | $438K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-05-31 | 2007-06-04 | $27.21 | $544K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-05-22 | 2007-05-24 | $27.05 | $482K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-05-21 | 2007-05-22 | $27.10 | $625K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-05-07 | 2007-05-08 | $27.60 | $54K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-05-04 | 2007-05-07 | $27.60 | $678K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL | 2007-05-02 | 2007-05-04 | $27.60 | $1.5M | -6.6% | -1.0% | -1.0% |
| MKSI | SELL · 10b5-1 | 2007-04-16 | 2007-04-17 | $26.86 | $755K | -6.6% | -1.0% | -1.0% |
| MKSI | SELL · 10b5-1 | 2007-02-15 | 2007-02-16 | $24.27 | $1.4M | -6.6% | -1.0% | -1.0% |
| MKSI | SELL · 10b5-1 | 2006-04-19 | 2006-04-21 | $23.86 | $1.3M | -6.6% | -1.0% | -1.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.