| 2018-01-08 | MKSI | Sr. VP, CFO & Treasurer | Sell | 10,000 | $102.07 | $1,020,730.00 | -45.9% | → |
| 2017-09-13 | MKSI | Sr. VP, CFO & Treasurer | Sell | 7,500 | $85.80 | $643,485.00 | -25.8% | → |
| 2017-03-15 | MKSI | Vice President, CFO, Treasurer | Sell | 5,000 | $68.27 | $341,345.00 | -16.3% | → |
| 2017-02-27 | MKSI | Vice President, CFO, Treasurer | Sell | 7,500 | $67.00 | $502,500.00 | -19.6% | → |
| 2016-11-16 | MKSI | Vice President, CFO, Treasurer | Sell | 10,000 | $55.45 | $554,500.00 | -34.1% | → |
| 2016-08-19 | MKSI | Vice President, CFO, Treasurer | Sell | 15,000 | $47.43 | $711,390.00 | -33.9% | → |
| 2016-02-26 | MKSI | Vice President, CFO, Treasurer | Sale+OE | 1,750 | $32.70 | $57,225.00 | -3.8% | → |
| 2016-02-17 | MKSI | Vice President, CFO, Treasurer | Sale+OE | 1,600 | $33.26 | $53,216.00 | -3.9% | → |
| 2016-02-11 | MKSI | Vice President, CFO, Treasurer | Sale+OE | 2,150 | $31.96 | $68,714.00 | -2.9% | → |
| 2015-02-23 | MKSI | Vice President, CFO, Treasurer | Sale+OE | 2,115 | $35.30 | $74,663.73 | -9.5% | → |
| 2015-02-10 | MKSI | Vice President, CFO, Treasurer | Sale+OE | 1,615 | $35.78 | $57,784.70 | -6.8% | → |