MKS INC (MKSI) Stock Ownership
NASDAQ:MKSI • US55306N1046
251.41 USD
-2.3 (-0.91%)
At close: Feb 24, 2026
252.695 USD
+1.28 (+0.51%)
After Hours: 2/24/2026, 8:00:01 PM
| Shares Outstanding | 67.17M |
| Float | 66.76M |
| Float Short Interest Percentage | 4.42% |
| Owners (insider) | 0.38% |
| Owners (institutional) | 110.69% |
| Owners (insider) change | 8.77% |
| Owners (institutional) change | -2.24% |
| Date | Name | Type | Shares | Price | Amount |
|---|---|---|---|---|---|
| Feb 20, 2026 | Taranto Eric Robert | Open Market Sale | 1453 | 247.55 | $ 359,690.15 |
| Feb 20, 2026 | McCarthy Michelle M | Open Market Sale | 1466 | 250.00 | $ 366,502.70 |
| Feb 20, 2026 | Moloney Jacqueline F | Open Market Sale | 829 | 247.55 | $ 205,218.95 |
| Feb 20, 2026 | CANNONE PETER III | Open Market Sale | 1250 | 258.06 | $ 322,574.50 |
| Feb 20, 2026 | COLELLA GERARD G | Open Market Sale | 20000 | 253.43 | $ 5,068,674.00 |
| Feb 20, 2026 | Williams John Edward | Open Market Sale | 2043 | 256.41 | $ 523,840.52 |
| Feb 20, 2026 | Burke Kathleen Flaherty | Open Market Sale | 4254 | 250.00 | $ 1,063,500.00 |
| Feb 20, 2026 | Lee John Tseng-Chung | Open Market Sale | 30000 | 256.77 | $ 7,703,242.04 |
| Feb 20, 2026 | Henry David Philip | Open Market Sale | 2000 | 261.56 | $ 523,120.20 |
| Feb 17, 2026 | Henry David Philip | Option Excercise | 9282 | $ 0.00 | |
| Feb 17, 2026 | Henry David Philip | Option Excercise | 4097 | 260.74 | $ 1,068,251.78 |
| Feb 17, 2026 | Schreiner James Alan | Option Excercise | 9225 | $ 0.00 | |
| Feb 17, 2026 | Schreiner James Alan | Option Excercise | 4344 | 260.74 | $ 1,132,654.56 |
| Feb 17, 2026 | Williams John Edward | Option Excercise | 3238 | $ 0.00 | |
| Feb 17, 2026 | Williams John Edward | Option Excercise | 1195 | 260.74 | $ 311,584.30 |
| Feb 17, 2026 | Mayampurath Ramakumar | Option Excercise | 5660 | $ 0.00 | |
| Feb 17, 2026 | Mayampurath Ramakumar | Option Excercise | 2516 | 260.74 | $ 656,021.84 |
| Feb 17, 2026 | Burke Kathleen Flaherty | Option Excercise | 12207 | $ 0.00 | |
| Feb 17, 2026 | Burke Kathleen Flaherty | Option Excercise | 5318 | 260.74 | $ 1,386,615.32 |
| Feb 17, 2026 | Lee John Tseng-Chung | Option Excercise | 69889 | $ 0.00 | |
| Feb 17, 2026 | Lee John Tseng-Chung | Option Excercise | 32548 | 260.74 | $ 8,486,565.52 |
| Feb 17, 2026 | Taranto Eric Robert | Option Excercise | 6472 | $ 0.00 | |
| Feb 17, 2026 | Taranto Eric Robert | Option Excercise | 2712 | 260.74 | $ 707,126.88 |
| Dec 2, 2025 | Mora Elizabeth | Open Market Sale | 300 | 158.81 | $ 47,643.00 |
| Nov 17, 2025 | Mayampurath Ramakumar | Option Excercise | 8295 | $ 0.00 | |
| Nov 17, 2025 | Mayampurath Ramakumar | Option Excercise | 2628 | 142.74 | $ 375,120.72 |
| Oct 31, 2025 | Lee John Tseng-Chung | Option Excercise | 2003 | $ 0.00 | |
| Oct 31, 2025 | Lee John Tseng-Chung | Option Excercise | 2003 | 143.71 | $ 287,851.13 |
| Oct 31, 2025 | Burke Kathleen Flaherty | Option Excercise | 777 | $ 0.00 | |
| Oct 31, 2025 | Burke Kathleen Flaherty | Option Excercise | 777 | 143.71 | $ 111,662.67 |
| Oct 22, 2025 | Schreiner James Alan | Open Market Sale | 711 | 138.68 | $ 98,601.48 |
| Oct 1, 2025 | Moloney Jacqueline F | Open Market Sale | 300 | 122.14 | $ 36,642.00 |
| Sep 18, 2025 | Schreiner James Alan | Open Market Sale | 838 | 124.00 | $ 103,912.00 |
| Sep 18, 2025 | Henry David Philip | Open Market Sale | 5000 | 130.00 | $ 650,000.00 |
| Sep 2, 2025 | Mora Elizabeth | Open Market Sale | 300 | 99.85 | $ 29,955.00 |
| Aug 18, 2025 | Schreiner James Alan | Option Excercise | 2641 | $ 0.00 | |
| Aug 18, 2025 | Schreiner James Alan | Option Excercise | 1249 | 100.22 | $ 125,174.78 |
| Aug 15, 2025 | Williams John Edward | Option Excercise | 947 | $ 0.00 | |
| Aug 15, 2025 | Williams John Edward | Option Excercise | 308 | 104.73 | $ 32,256.84 |
| Aug 1, 2025 | Moloney Jacqueline F | Open Market Sale | 300 | 92.10 | $ 27,630.00 |
| Jul 7, 2025 | Schreiner James Alan | Open Market Sale | 957 | 102.44 | $ 98,035.08 |
| Jul 3, 2025 | Henry David Philip | Open Market Sale | 2000 | 105.00 | $ 210,000.00 |
| Jun 2, 2025 | Mora Elizabeth | Open Market Sale | 300 | 81.78 | $ 24,534.00 |
| May 12, 2025 | COLELLA GERARD G | Grant | 2479 | $ 0.00 | |
| May 12, 2025 | Mora Elizabeth | Grant | 2479 | $ 0.00 | |
| May 12, 2025 | Moloney Jacqueline F | Grant | 2479 | $ 0.00 | |
| May 12, 2025 | JABRE WISSAM G | Grant | 2479 | $ 0.00 | |
| May 12, 2025 | Donahue Joseph B | Grant | 2479 | $ 0.00 | |
| May 12, 2025 | CANNONE PETER III | Grant | 2479 | $ 0.00 | |
| May 12, 2025 | Batra Raj | Grant | 2479 | $ 0.00 | |
| Apr 17, 2025 | Williams John Edward | Option Excercise | 1740 | $ 0.00 | |
| Apr 17, 2025 | Williams John Edward | Option Excercise | 565 | 63.69 | $ 35,984.85 |
| Apr 15, 2025 | McCarthy Michelle M | Option Excercise | 2074 | $ 0.00 | |
| Apr 15, 2025 | McCarthy Michelle M | Option Excercise | 608 | 68.48 | $ 41,635.84 |
| Mar 3, 2025 | Mora Elizabeth | Open Market Sale | 275 | 92.46 | $ 25,426.50 |
| Mar 3, 2025 | Moloney Jacqueline F | Open Market Sale | 300 | 92.46 | $ 27,738.00 |