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| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2020 | MKS INSTRUMENTS INC | MKSI | 0 | -17,774 | 0 | -1,941,000 | |
| 09/30/2020 | MKS INSTRUMENTS INC | MKSI | 17,774 | -861 | 1,941,000 | -169,000 | $109.20 |
| 06/30/2020 | MKS INSTRUMENTS INC | MKSI | 18,635 | -3,266 | 2,110,000 | 326,000 | $113.23 |
| 03/31/2020 | MKS INSTRUMENTS INC | MKSI | 21,901 | -7,379 | 1,784,000 | -1,437,000 | $81.46 |
| 12/31/2019 | MKS INSTRUMENTS INC | MKSI | 29,280 | -24,851 | 3,221,000 | -1,774,000 | $110.01 |
| 09/30/2019 | MKS INSTRUMENTS INC | MKSI | 54,131 | -46,911 | 4,995,000 | -2,875,000 | $92.28 |
| 06/30/2019 | MKS INSTRUMENTS INC | MKSI | 101,042 | 101,042 | 7,870,000 | 7,870,000 | $77.89 |
| 03/31/2019 | MKS INSTRUMENTS INC | MKSI | 0 | -146,616 | 0 | -9,473,000 | |
| 12/31/2018 | MKS INSTRUMENTS INC | MKSI | 146,616 | -18,609 | 9,473,000 | -3,770,000 | $64.61 |
| 09/30/2018 | MKS INSTRUMENTS INC | MKSI | 165,225 | 165,225 | 13,243,000 | 13,243,000 | $80.15 |
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