Michelle McCarthy, VP and Chief Accounting Officer at MKS Instruments (MKSI), made two open market sales of company shares over the past year, totaling about $367 thousand. Her latest sale occurred on February 20, 2026. These transactions rank 7,137th among 11,678 insiders in our database, well below the average sale value of $8.6 million across about six trades per seller. She reported no open market purchases.
| 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 | McCarthy Michelle M | VP & Chief Accounting Officer | S | Common Stock | 816 | $250.35 | 0.0000 | 67,600,000 | 100.00% | 0.00% |
| Feb. 20, 2026 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | S | Common Stock | 650 | $249.57 | 816.0000 | 67,600,000 | 44.34% | 0.00% |
| April 15, 2025 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | F | Common Stock | 608 | $68.48 | 1,466.0000 | 67,600,000 | 29.32% | 0.00% |
| April 15, 2025 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | M | Restricted Stock Unit | 968 | $0.00 | 5,422.4140 | 67,600,000 | 15.15% | 0.00% |
| April 15, 2025 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | M | Restricted Stock Unit | 1106 | $0.00 | 4,316.4140 | 67,600,000 | 20.40% | 0.00% |
| April 15, 2025 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | M | Common Stock | 968 | $0.00 | 968.0000 | 67,600,000 | 9999.99% | 0.00% |
| April 15, 2025 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | A | Restricted Stock Unit | 5210 | $0.00 | 9,526.2980 | 67,600,000 | 120.70% | 0.01% |
| April 15, 2025 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | M | Common Stock | 1106 | $0.00 | 2,074.0000 | 67,600,000 | 114.26% | 0.00% |
| Aug. 15, 2024 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | A | Restricted Stock Unit | 166 | $0.00 | 6,390.4140 | 66,800,000 | 2.67% | 0.00% |
| April 15, 2024 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | A | Restricted Stock Unit | 3320 | $0.00 | 6,224.0660 | 66,800,000 | 114.29% | 0.00% |
| April 15, 2024 | MKS INC | $MKSI | McCarthy Michelle M | VP & Chief Accounting Officer | A | Restricted Stock Unit | 2905 | $0.00 | 2,904.5640 | 66,800,000 | 9999.99% | 0.00% |