David Philip Henry serves as Executive at MKS INSTRUMENTS INC, where they oversee executive responsibilities. Since joining the company, David Philip Henry has executed 30 insider transactions totaling $1.1M, demonstrating a bearish approach to their equity position. Their most recent transaction on Feb 8, 2026 involved receiving (via award) 5,521.95 shares valued at $0.
David Philip Henry currently holds 18,808.11 shares of MKS INSTRUMENTS INC (MKSI), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, David Philip Henry has been a net seller of MKSI stock. They have purchased $170.8K and sold $913.0K worth of shares.
David Philip Henry's most recent insider trade was on Feb 8, 2026, when they sold 5,521.95 shares at $0.00 per share.
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| $130.00 |
| Discretionary |
| Jul 3, 2025 | MKSI | $210.0K | Sale | 2,000 | $105.00 | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 1,100 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 1,528 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 581.16 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $328.8K | Payment | 2,692 | $122.15 | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 2,405 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 1,246 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 1,162.32 | $N/A | Discretionary |
| Nov 7, 2023 | MKSI | $170.8K | Purchase | 2,500 | $68.34 | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 581 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 1,098 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 1,527 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $163.4K | Payment | 1,629 | $100.29 | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 1,161 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 1,171.78 | $N/A | Discretionary |
| Apr 18, 2022 | MKSI | $0 | Option Exercise | 479.34 | $N/A | Discretionary |
| Apr 18, 2022 | MKSI | $18.6K | Payment | 162 | $114.99 | Discretionary |
| Feb 15, 2022 | MKSI | $130.6K | Payment | 856 | $152.55 | Discretionary |
| Feb 15, 2022 | MKSI | $0 | Option Exercise | 580 | $N/A | Discretionary |
| Feb 15, 2022 | MKSI | $0 | Option Exercise | 1,161 | $N/A | Discretionary |
| Feb 15, 2022 | MKSI | $0 | Option Exercise | 1,171 | $N/A | Discretionary |
| May 20, 2021 | MKSI | $53.0K | Sale | 284 | $186.70 | Discretionary |
| Apr 15, 2021 | MKSI | $0 | Option Exercise | 479 | $N/A | Discretionary |
| Apr 15, 2021 | MKSI | $26.5K | Payment | 141 | $188.26 | Discretionary |
| Apr 13, 2021 | MKSI | $0 | Option Exercise | 356.38 | $N/A | Discretionary |
| Apr 13, 2021 | MKSI | $19.6K | Payment | 105 | $186.52 | Discretionary |
| Feb 16, 2021 | MKSI | $0 | Option Exercise | 1,170 | $N/A | Discretionary |
| Feb 16, 2021 | MKSI | $59.2K | Payment | 344 | $172.20 | Discretionary |