| 2012-02-06 | Sale | MKS Instruments, Inc. MKSI | director | 4,000 0.0076% | $31.74 | $126,952 | -14.73% | |
| 2011-11-04 | Sale | MKS Instruments, Inc. MKSI | director | 24,000 0.0433% | $25.81 | $619,404 | +1.15% | |
| 2011-07-28 | Sale | MKS Instruments, Inc. MKSI | director | 24,000 0.0413% | $22.60 | $542,448 | +9.57% | |
| 2011-05-06 | Sale | MKS Instruments, Inc. MKSI | director | 36,000 0.0605% | $23.54 | $847,536 | -0.15% | |
| 2010-12-17 | Sale | MKS Instruments, Inc. MKSI | director | 4,000 0.0077% | $24.03 | $96,120 | +7.95% | |
| 2009-08-03 | Sale | MKS Instruments, Inc. MKSI | director | 8,000 0.0161% | $19.60 | $156,800 | -3.43% | |
| 2009-03-18 | Sale | MKS Instruments, Inc. MKSI | director | 21,000 0.0412% | $14.18 | $297,675 | +15.14% | |
| 2009-02-06 | Sale | MKS Instruments, Inc. MKSI | director | 12,000 0.0226% | $14.78 | $177,300 | +0.88% | |
| 2008-05-08 | Sale | MKS Instruments, Inc. MKSI | director | 8,000 0.016% | $24.12 | $192,960 | -33.24% | |
| 2007-06-14 | Sale | MKS Instruments, Inc. MKSI | director | 3,620 0.0064% | $27.85 | $100,825 | -25.36% | |
| 2003-09-05 | Sale | MKS Instruments, Inc. MKSI | director | 7,364 0.0142% | $26.70 | $196,619 | -13.3% |