James Alan Schreiner serves as Executive at MKS INSTRUMENTS INC, where they oversee executive responsibilities. Since joining the company, James Alan Schreiner has executed 36 insider transactions totaling $300.5K, demonstrating a bearish approach to their equity position. Their most recent transaction on Feb 8, 2026 involved receiving (via award) 5,226.76 shares valued at $0.
James Alan Schreiner currently holds 18,244.9 shares of MKS INSTRUMENTS INC (MKSI), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, James Alan Schreiner has been a net seller of MKSI stock. They have purchased $0 and sold $300.5K worth of shares.
James Alan Schreiner's most recent insider trade was on Feb 8, 2026, when they sold 5,226.76 shares at $0.00 per share.
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| $138.68 |
| Discretionary |
| Sep 18, 2025 | MKSI | $103.9K | Sale | 838 | $124.00 | Discretionary |
| Aug 18, 2025 | MKSI | $125.2K | Payment | 1,249 | $100.22 | Discretionary |
| Aug 18, 2025 | MKSI | $0 | Option Exercise | 2,640.94 | $N/A | Discretionary |
| Jul 7, 2025 | MKSI | $98.0K | Sale | 957 | $102.44 | Discretionary |
| Aug 19, 2024 | MKSI | $223.1K | Payment | 1,873 | $119.09 | Discretionary |
| Aug 19, 2024 | MKSI | $0 | Option Exercise | 3,961 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 1,173 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 1,329 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 2,565 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $458.8K | Payment | 3,756 | $122.15 | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 1,629 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 653.93 | $N/A | Discretionary |
| Feb 15, 2024 | MKSI | $0 | Option Exercise | 1,306.86 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 1,171 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 1,629 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 653 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $190.5K | Payment | 1,899 | $100.29 | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 695.71 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 1,001.43 | $N/A | Discretionary |
| Feb 15, 2023 | MKSI | $0 | Option Exercise | 1,307 | $N/A | Discretionary |
| Sep 16, 2022 | MKSI | $0 | Option Exercise | 1,434.08 | $N/A | Discretionary |
| Sep 16, 2022 | MKSI | $56.8K | Payment | 637 | $89.11 | Discretionary |
| Feb 15, 2022 | MKSI | $0 | Option Exercise | 1,306 | $N/A | Discretionary |
| Feb 15, 2022 | MKSI | $0 | Option Exercise | 1,001 | $N/A | Discretionary |
| Feb 15, 2022 | MKSI | $0 | Option Exercise | 695 | $N/A | Discretionary |
| Feb 15, 2022 | MKSI | $189.5K | Payment | 1,242 | $152.55 | Discretionary |
| Feb 15, 2022 | MKSI | $0 | Option Exercise | 653 | $N/A | Discretionary |
| Sep 16, 2021 | MKSI | $68.3K | Payment | 454 | $150.50 | Discretionary |