| 2010-04-26 | Sale | MKS Instruments, Inc. MKSI | director | 8,000 0.0165% | $24.75 | $198,000 | -12.03% | |
| 2008-05-13 | Sale | MKS Instruments, Inc. MKSI | director | 5,974 0.012% | $24.77 | $147,976 | -34.87% | |
| 2008-05-08 | Sale | MKS Instruments, Inc. MKSI | director | 8,000 0.0159% | $23.85 | $190,800 | -33.24% | |
| 2007-05-14 | Sale | MKS Instruments, Inc. MKSI | director | 24,000 0.0422% | $27.17 | $652,060 | -23.75% | |
| 2007-02-22 | Sale | MKS Instruments, Inc. MKSI | director | 24,000 0.0371% | $21.72 | $521,319 | -12.71% | |
| 2006-12-14 | Sale | MKS Instruments, Inc. MKSI | director | 3,400 0.0061% | $20.81 | $70,754 | +8.91% | |
| 2006-05-08 | Sale | MKS Instruments, Inc. MKSI | director | 13,876 0.0239% | $23.16 | $321,436 | -12.16% | |
| 2006-03-14 | Sale | MKS Instruments, Inc. MKSI | director | 12,000 0.0163% | $17.06 | $204,720 | -6.88% | |
| 2006-02-21 | Sale | MKS Instruments, Inc. MKSI | director | 9,374 0.0172% | $23.06 | $216,164 | -6.92% | |
| 2004-11-29 | Sale | MKS Instruments, Inc. MKSI | director | 20,008 0.0373% | $17.31 | $346,338 | +1.39% | |
| 2003-07-29 | Sale | MKS Instruments, Inc. MKSI | director | 7,600 0.0147% | $22.77 | $173,052 | +3.93% |