Henry David Philip, EVP of Global Strategic Marketing and GM of MSD at MKS Instruments ($MKSI), sold about $1.38 million in company shares through three open market transactions over the past year. His most recent sale occurred on February 20, 2026. These sales rank him 4,212th among 11,678 insiders by total value sold, below the average of $8.6 million per insider and 6.4 transactions. 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. 20, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | S | Common Stock | 2000 | $261.56 | 18,841.3680 | 67,600,000 | 9.60% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Restricted Stock Unit | 456 | $0.00 | 17,266.0560 | 67,600,000 | 2.58% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Restricted Stock Unit | 1247 | $0.00 | 17,722.5060 | 67,600,000 | 6.57% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Restricted Stock Unit | 2406 | $0.00 | 18,969.6620 | 67,600,000 | 11.25% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | A | Restricted Stock Unit | 2567 | $0.00 | 21,375.2330 | 67,600,000 | 13.65% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | F | Common Stock | 4097 | $260.74 | 20,841.3680 | 67,600,000 | 16.43% | 0.01% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Common Stock | 2054 | $0.00 | 24,938.6370 | 67,600,000 | 8.98% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Common Stock | 1841 | $0.00 | 22,884.6370 | 67,600,000 | 8.75% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Common Stock | 1278 | $0.00 | 21,043.9970 | 67,600,000 | 6.47% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Common Stock | 456 | $0.00 | 19,765.9970 | 67,600,000 | 2.36% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Common Stock | 1247 | $0.00 | 19,309.5470 | 67,600,000 | 6.90% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Common Stock | 2406 | $0.00 | 18,062.3910 | 67,600,000 | 15.36% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Restricted Stock Unit | 1841 | $0.00 | 14,147.4160 | 67,600,000 | 11.51% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Restricted Stock Unit | 2054 | $0.00 | 12,093.4160 | 67,600,000 | 14.52% | 0.00% |
| Feb. 17, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | M | Restricted Stock Unit | 1278 | $0.00 | 15,988.0560 | 67,600,000 | 7.40% | 0.00% |
| Feb. 8, 2026 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | A | Restricted Stock Unit | 5522 | $0.00 | 18,808.1070 | 67,600,000 | 41.56% | 0.01% |
| Sept. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Global Str Mktg & GM, MSD | S | Common Stock | 5000 | $130.00 | 15,571.1800 | 67,600,000 | 24.31% | 0.01% |
| July 3, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | S | Common Stock | 2000 | $105.00 | 20,571.1800 | 67,600,000 | 8.86% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1278 | $0.00 | 13,286.1580 | 67,600,000 | 8.77% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1528 | $0.00 | 18,305.7840 | 67,600,000 | 9.11% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1099 | $0.00 | 19,405.1530 | 67,600,000 | 6.01% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 2406 | $0.00 | 21,811.1530 | 67,600,000 | 12.40% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1246 | $0.00 | 23,057.1530 | 67,600,000 | 5.71% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 456 | $0.00 | 23,513.0930 | 67,600,000 | 1.98% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1278 | $0.00 | 24,791.0930 | 67,600,000 | 5.44% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | F | Common Stock | 2372 | $103.67 | 22,419.0930 | 67,600,000 | 9.57% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | A | Restricted Stock Unit | 6163 | $0.00 | 21,299.8090 | 67,600,000 | 40.71% | 0.01% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1528 | $0.00 | 19,771.4670 | 67,600,000 | 7.18% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1099 | $0.00 | 18,672.0980 | 67,600,000 | 5.56% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 2406 | $0.00 | 16,266.0980 | 67,600,000 | 12.89% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1246 | $0.00 | 15,020.0980 | 67,600,000 | 7.66% | 0.00% |
| Feb. 18, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 456 | $0.00 | 14,564.1580 | 67,600,000 | 3.04% | 0.00% |
| Feb. 10, 2025 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | A | Restricted Stock Unit | 1369 | $0.00 | 15,136.9190 | 67,600,000 | 9.94% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1246 | $0.00 | 13,767.7230 | 66,800,000 | 8.30% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 2405 | $0.00 | 15,013.7230 | 66,800,000 | 13.81% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1100 | $0.00 | 17,418.7230 | 66,800,000 | 5.94% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1528 | $0.00 | 18,518.7230 | 66,800,000 | 7.62% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 581 | $0.00 | 20,046.7230 | 66,800,000 | 2.82% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1162 | $0.00 | 20,627.8830 | 66,800,000 | 5.33% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | A | Restricted Stock Unit | 3835 | $0.00 | 21,790.2040 | 66,800,000 | 21.36% | 0.01% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | F | Common Stock | 2692 | $122.15 | 16,529.9030 | 66,800,000 | 14.00% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1246 | $0.00 | 19,221.9030 | 66,800,000 | 6.93% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 2405 | $0.00 | 17,975.9030 | 66,800,000 | 15.45% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1100 | $0.00 | 15,570.9030 | 66,800,000 | 7.60% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1528 | $0.00 | 14,470.9030 | 66,800,000 | 11.81% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 581 | $0.00 | 12,942.9030 | 66,800,000 | 4.70% | 0.00% |
| Feb. 15, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1162 | $0.00 | 12,361.7430 | 66,800,000 | 10.38% | 0.00% |
| Feb. 5, 2024 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | A | Restricted Stock Unit | 7217 | $0.00 | 17,954.9190 | 66,800,000 | 67.20% | 0.01% |
| Nov. 7, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | P | Common Stock | 2500 | $68.34 | 11,073.3500 | 59,900,000 | 29.16% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1172 | $0.00 | 5,685.2540 | 59,900,000 | 25.96% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 581 | $0.00 | 7,427.2540 | 59,900,000 | 8.49% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1527 | $0.00 | 8,954.2540 | 59,900,000 | 20.56% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1098 | $0.00 | 10,052.2540 | 59,900,000 | 12.26% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | F | Common Stock | 1629 | $100.29 | 8,423.2540 | 59,900,000 | 16.21% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | A | Restricted Stock Unit | 3739 | $0.00 | 16,277.1260 | 59,900,000 | 29.82% | 0.01% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1172 | $0.00 | 15,105.3480 | 59,900,000 | 7.20% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1161 | $0.00 | 13,944.3480 | 59,900,000 | 7.69% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 581 | $0.00 | 13,363.3480 | 59,900,000 | 4.17% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1527 | $0.00 | 11,836.3480 | 59,900,000 | 11.43% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Restricted Stock Unit | 1098 | $0.00 | 10,738.3480 | 59,900,000 | 9.28% | 0.00% |
| Feb. 15, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | M | Common Stock | 1161 | $0.00 | 6,846.2540 | 59,900,000 | 20.42% | 0.00% |
| Feb. 8, 2023 | MKS INC | $MKSI | Henry David Philip | EVP, Operations & Corp Mktg | A | Restricted Stock Unit | 4583 | $0.00 | 12,537.9700 | 59,900,000 | 57.62% | 0.01% |