James Alan Schreiner, EVP and COO of MKS Instruments ($MKSI), sold shares on the open market four times over the past year for a total of $1.35 million. His most recent sale occurred on February 24, 2026. These transactions rank 4,266th among 11,678 insiders, trailing the average sale value of $8.6 million across 6.4 transactions per seller. He made no open market purchases in this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 24, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | S | Common Stock | 4100 | $255.00 | 23,401.9620 | 67,600,000 | 14.91% | 0.01% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Restricted Stock Unit | 1330 | $0.00 | 16,724.7550 | 67,600,000 | 7.37% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Restricted Stock Unit | 2567 | $0.00 | 18,055.1890 | 67,600,000 | 12.45% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | A | Restricted Stock Unit | 2377 | $0.00 | 20,621.8670 | 67,600,000 | 13.03% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | F | Common Stock | 4344 | $260.74 | 27,501.9620 | 67,600,000 | 13.64% | 0.01% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Common Stock | 1944 | $0.00 | 31,845.7260 | 67,600,000 | 6.50% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Common Stock | 1741 | $0.00 | 29,901.7260 | 67,600,000 | 6.18% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Common Stock | 1211 | $0.00 | 28,160.9260 | 67,600,000 | 4.49% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Common Stock | 432 | $0.00 | 26,949.9260 | 67,600,000 | 1.63% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Common Stock | 1330 | $0.00 | 26,517.4460 | 67,600,000 | 5.28% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Common Stock | 2567 | $0.00 | 25,187.0120 | 67,600,000 | 11.35% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Restricted Stock Unit | 432 | $0.00 | 16,292.2750 | 67,600,000 | 2.59% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Restricted Stock Unit | 1944 | $0.00 | 11,396.4750 | 67,600,000 | 14.57% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Restricted Stock Unit | 1741 | $0.00 | 13,340.4750 | 67,600,000 | 11.54% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Restricted Stock Unit | 1211 | $0.00 | 15,081.2750 | 67,600,000 | 7.43% | 0.00% |
| Feb. 8, 2026 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | A | Restricted Stock Unit | 5227 | $0.00 | 18,244.8990 | 67,600,000 | 40.15% | 0.01% |
| Oct. 22, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | S | Common Stock | 711 | $138.68 | 22,534.6940 | 67,600,000 | 3.06% | 0.00% |
| Sept. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | S | Common Stock | 838 | $124.00 | 23,245.6940 | 67,600,000 | 3.48% | 0.00% |
| Aug. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Restricted Stock Unit | 2641 | $0.00 | 13,018.1400 | 67,600,000 | 16.87% | 0.00% |
| Aug. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | F | Common Stock | 1249 | $100.22 | 24,083.6940 | 67,600,000 | 4.93% | 0.00% |
| Aug. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | M | Common Stock | 2641 | $0.00 | 25,332.6940 | 67,600,000 | 11.64% | 0.00% |
| Aug. 4, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO | A | Restricted Stock Unit | 1330 | $0.00 | 15,659.0820 | 67,600,000 | 9.28% | 0.00% |
| July 7, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | S | Common Stock | 957 | $102.44 | 22,691.7520 | 67,600,000 | 4.05% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1211 | $0.00 | 14,329.2950 | 67,600,000 | 7.79% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1630 | $0.00 | 20,433.9890 | 67,600,000 | 8.67% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1173 | $0.00 | 21,606.6950 | 67,600,000 | 5.74% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 2566 | $0.00 | 24,172.6950 | 67,600,000 | 11.88% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1329 | $0.00 | 25,501.6950 | 67,600,000 | 5.50% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 432 | $0.00 | 25,933.6650 | 67,600,000 | 1.69% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1211 | $0.00 | 27,144.6650 | 67,600,000 | 4.67% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | F | Common Stock | 3648 | $103.67 | 23,496.6650 | 67,600,000 | 13.44% | 0.01% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | A | Restricted Stock Unit | 4504 | $0.00 | 22,670.1920 | 67,600,000 | 24.79% | 0.01% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1630 | $0.00 | 21,039.9710 | 67,600,000 | 7.19% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1173 | $0.00 | 19,867.2650 | 67,600,000 | 5.57% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 2566 | $0.00 | 17,301.2650 | 67,600,000 | 12.92% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1329 | $0.00 | 15,972.2650 | 67,600,000 | 7.68% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 432 | $0.00 | 15,540.2950 | 67,600,000 | 2.70% | 0.00% |
| Feb. 10, 2025 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | A | Restricted Stock Unit | 1297 | $0.00 | 18,166.5420 | 67,600,000 | 7.69% | 0.00% |
| Aug. 19, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | F | Common Stock | 1873 | $119.09 | 18,704.7030 | 66,800,000 | 9.10% | 0.00% |
| Aug. 19, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 3961 | $0.00 | 16,869.4090 | 66,800,000 | 19.02% | 0.01% |
| Aug. 19, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 3961 | $0.00 | 20,577.7030 | 66,800,000 | 23.84% | 0.01% |
| May 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | A | Restricted Stock Unit | 6602 | $0.00 | 20,830.4090 | 66,800,000 | 46.40% | 0.01% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1329 | $0.00 | 14,228.4670 | 66,800,000 | 8.54% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 2565 | $0.00 | 15,557.4670 | 66,800,000 | 14.15% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1173 | $0.00 | 18,122.4670 | 66,800,000 | 6.08% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1629 | $0.00 | 19,295.4670 | 66,800,000 | 7.79% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 654 | $0.00 | 20,924.4670 | 66,800,000 | 3.03% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1307 | $0.00 | 21,578.3970 | 66,800,000 | 5.71% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | A | Restricted Stock Unit | 3633 | $0.00 | 22,885.2580 | 66,800,000 | 18.87% | 0.01% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | F | Common Stock | 3756 | $122.15 | 16,468.2290 | 66,800,000 | 18.57% | 0.01% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1329 | $0.00 | 20,224.2290 | 66,800,000 | 7.03% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 2565 | $0.00 | 18,895.2290 | 66,800,000 | 15.71% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1173 | $0.00 | 16,330.2290 | 66,800,000 | 7.74% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1629 | $0.00 | 15,157.2290 | 66,800,000 | 12.04% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 654 | $0.00 | 13,528.2290 | 66,800,000 | 5.08% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1307 | $0.00 | 12,874.2990 | 66,800,000 | 11.30% | 0.00% |
| Feb. 5, 2024 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | A | Restricted Stock Unit | 7698 | $0.00 | 19,251.8300 | 66,800,000 | 66.62% | 0.01% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 653 | $0.00 | 10,390.2700 | 59,900,000 | 6.71% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1307 | $0.00 | 9,737.2700 | 59,900,000 | 15.50% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 696 | $0.00 | 8,430.2700 | 59,900,000 | 8.99% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1001 | $0.00 | 7,734.5580 | 59,900,000 | 14.87% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1629 | $0.00 | 12,019.2700 | 59,900,000 | 15.68% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Common Stock | 1171 | $0.00 | 13,190.2700 | 59,900,000 | 9.74% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | F | Common Stock | 1899 | $100.29 | 11,291.2700 | 59,900,000 | 14.40% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | A | Restricted Stock Unit | 3988 | $0.00 | 18,011.2890 | 59,900,000 | 28.44% | 0.01% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1001 | $0.00 | 17,009.8640 | 59,900,000 | 5.56% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 696 | $0.00 | 16,314.1520 | 59,900,000 | 4.09% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1307 | $0.00 | 15,007.1520 | 59,900,000 | 8.01% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 653 | $0.00 | 14,354.1520 | 59,900,000 | 4.35% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1629 | $0.00 | 12,725.1520 | 59,900,000 | 11.35% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | M | Restricted Stock Unit | 1171 | $0.00 | 11,554.1520 | 59,900,000 | 9.20% | 0.00% |
| Feb. 8, 2023 | MKS INC | $MKSI | Schreiner James Alan | EVP & COO, MSD | A | Restricted Stock Unit | 4888 | $0.00 | 14,022.8550 | 59,900,000 | 53.51% | 0.01% |