MKSI MKS INC
Nasdaq · SEC CIK 1049502 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $43.54M 34 sales by 13 insiders
- Filings on record
- 236 since 2021-09-02, latest 2026-09-02 12:34
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| Lee John Tseng-Chung | Pres, CEO, Dir | — | $13.88M |
| COLELLA GERALD G | Dir | — | $11.74M |
| Henry David Philip | EVP, Gbl Str Mktg, GM, MSD | — | $3.24M |
| Mayampurath Ramakumar | EVP, CFO | — | $2.78M |
| Schreiner James Alan | EVP, COO | — | $2.60M |
| Burke Kathleen Flaherty | EVP, GC, Sec | — | $2.46M |
| Taranto Eric Robert | EVP, GM, VSD | — | $2.28M |
| McCarthy Michelle M | VP, CAO | — | $1.13M |
| Moloney Jacqueline F | Dir | — | $1.07M |
| CANNONE PETER III | Dir | — | $732.2K |
Transactions 248
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-02-19 | 2025-02-18 | MKSI | Schreiner James Alan | EVP, COO, MSD | F - Tax | $103.67 | -3,648 | 23.5K | -13% | -$378.2K |
| I | 2025-02-19 | 2025-02-18 | MKSI | COLELLA GERARD G | Dir | S - Sale | $104.53 | -8,000 | 60.0K | -12% | -$836.2K |
| 2024-12-11 | 2024-12-10 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $114.80 | -300 | 9,983 | -3% | -$34.4K | |
| D | 2024-12-10 | 2024-12-06 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | F - Tax | $114.60 | -2,994 | 112.7K | -3% | -$343.1K |
| DM | 2024-12-10 | 2024-12-06 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | M - OptEx | — | +2,994 | 114.7K | +3% | — |
| 2024-12-03 | 2024-12-02 | MKSI | Mora Elizabeth | Dir | S - Sale | $113.41 | -275 | 17.7K | -2% | -$31.2K | |
| 2024-11-05 | 2024-11-04 | MKSI | JABRE WISSAM G | Dir | A - Grant | — | +2,009 | 2,009 | New | — | |
| 2024-10-02 | 2024-10-01 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $108.90 | -250 | 10.3K | -2% | -$27.2K | |
| 2024-09-04 | 2024-09-03 | MKSI | Mora Elizabeth | Dir | S - Sale | $115.97 | -275 | 17.9K | -2% | -$31.9K | |
| D | 2024-08-20 | 2024-08-19 | MKSI | Schreiner James Alan | EVP, COO, MSD | M - OptEx | — | +3,961 | 20.6K | +24% | — |
| D | 2024-08-20 | 2024-08-19 | MKSI | Schreiner James Alan | EVP, COO, MSD | F - Tax | $119.09 | -1,873 | 18.7K | -9% | -$223.1K |
| 2024-08-19 | 2024-08-16 | MKSI | Williams John Edward | EVP, GM, PSD | S - Sale | $118.71 | -1,800 | 13 | -99% | -$213.7K | |
| D | 2024-08-16 | 2024-08-15 | MKSI | Williams John Edward | EVP, GM, PSD | M - OptEx | — | +946 | 2,120 | +81% | — |
| D | 2024-08-16 | 2024-08-15 | MKSI | Williams John Edward | EVP, GM, PSD | F - Tax | $113.91 | -307 | 1,813 | -14% | -$35.0K |
| 2024-08-02 | 2024-08-01 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $123.46 | -250 | 10.5K | -2% | -$30.9K | |
| 2024-06-04 | 2024-06-03 | MKSI | Mora Elizabeth | Dir | S - Sale | $129.41 | -275 | 18.2K | -1% | -$35.6K | |
| 2024-05-08 | 2024-05-07 | MKSI | Mora Elizabeth | Dir | A - Grant | — | +1,622 | 18.5K | +10% | — | |
| 2024-05-08 | 2024-05-07 | MKSI | COLELLA GERARD G | Dir | A - Grant | — | +1,622 | 5,738 | +39% | — | |
| 2024-05-08 | 2024-05-07 | MKSI | CANNONE PETER III | Dir | A - Grant | — | +1,622 | 7,133 | +29% | — | |
| 2024-05-08 | 2024-05-07 | MKSI | Batra Raj | Dir | A - Grant | — | +1,622 | 13.0K | +14% | — | |
| 2024-05-08 | 2024-05-07 | MKSI | Warner Michelle M | Dir | A - Grant | — | +1,622 | 10.9K | +18% | — | |
| 2024-05-08 | 2024-05-07 | MKSI | Moloney Jacqueline F | Dir | A - Grant | — | +1,622 | 10.8K | +18% | — | |
| 2024-05-08 | 2024-05-07 | MKSI | Donahue Joseph B | Dir | A - Grant | — | +1,622 | 8,871 | +22% | — | |
| 2024-04-02 | 2024-04-01 | MKSI | Mora Elizabeth | Dir | S - Sale | $133.00 | -250 | 16.9K | -1% | -$33.2K | |
| 2024-03-04 | 2024-03-01 | MKSI | Burke Kathleen Flaherty | EVP, GC, Sec | S - Sale | $122.89 | -7,411 | 43.0K | -15% | -$910.7K | |
| 2024-03-04 | 2024-03-01 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $122.89 | -250 | 9,161 | -3% | -$30.7K | |
| M | 2024-02-26 | 2024-02-22 | MKSI | BAGSHAW SETH H | EVP, CFO, Treas | S - Sale | $123.28 | -32.9K | 12.6K | -72% | -$4.05M |
| 2024-02-20 | 2024-02-16 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $124.10 | -1,917 | 9,411 | -17% | -$237.9K | |
| DM | 2024-02-16 | 2024-02-15 | MKSI | Schreiner James Alan | EVP, COO, MSD | M - OptEx | — | +8,657 | 16.3K | +113% | — |
| D | 2024-02-16 | 2024-02-15 | MKSI | Schreiner James Alan | EVP, COO, MSD | F - Tax | $122.15 | -3,756 | 16.5K | -19% | -$458.8K |
| DM | 2024-02-16 | 2024-02-15 | MKSI | Henry David Philip | EVP, Ops, Corp Mktg | M - OptEx | — | +8,022 | 15.6K | +106% | — |
| D | 2024-02-16 | 2024-02-15 | MKSI | Henry David Philip | EVP, Ops, Corp Mktg | F - Tax | $122.15 | -2,692 | 16.5K | -14% | -$328.8K |
| DM | 2024-02-16 | 2024-02-15 | MKSI | Gitin Mark Milton | EVP, GM, PSD | M - OptEx | — | +6,841 | 15.7K | +78% | — |
| D | 2024-02-16 | 2024-02-15 | MKSI | Gitin Mark Milton | EVP, GM, PSD | F - Tax | $122.15 | -2,552 | 16.1K | -14% | -$311.7K |
| DM | 2024-02-16 | 2024-02-15 | MKSI | Burke Kathleen Flaherty | EVP, GC, Sec | M - OptEx | — | +12.5K | 53.5K | +30% | — |
| D | 2024-02-16 | 2024-02-15 | MKSI | Burke Kathleen Flaherty | EVP, GC, Sec | F - Tax | $122.15 | -4,912 | 50.4K | -9% | -$600.0K |
| DM | 2024-02-16 | 2024-02-15 | MKSI | BAGSHAW SETH H | EVP, CFO, Treas | M - OptEx | — | +21.4K | 32.5K | +192% | — |
| D | 2024-02-16 | 2024-02-15 | MKSI | BAGSHAW SETH H | EVP, CFO, Treas | F - Tax | $122.15 | -9,173 | 32.9K | -22% | -$1.12M |
| DM | 2024-02-16 | 2024-02-15 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | M - OptEx | — | +64.5K | 135.0K | +92% | — |
| D | 2024-02-16 | 2024-02-15 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | F - Tax | $122.15 | -30.2K | 112.4K | -21% | -$3.69M |
| DM | 2024-02-16 | 2024-02-15 | MKSI | Taranto Eric Robert | EVP, GM, VSD | M - OptEx | — | +5,762 | 12.1K | +91% | — |
| D | 2024-02-16 | 2024-02-15 | MKSI | Taranto Eric Robert | EVP, GM, VSD | F - Tax | $122.15 | -1,694 | 13.1K | -11% | -$206.9K |
| I | 2024-02-12 | 2024-02-09 | MKSI | COLELLA GERARD G | Dir | S - Sale | $120.00 | -10.0K | 68.0K | -13% | -$1.20M |
| I | 2024-01-23 | 2024-01-22 | MKSI | COLELLA GERARD G | Dir | S - Sale | $110.00 | -10.0K | 78.0K | -11% | -$1.10M |
| 2024-01-03 | 2024-01-02 | MKSI | Mora Elizabeth | Dir | S - Sale | $100.90 | -250 | 17.1K | -1% | -$25.2K | |
| D | 2023-12-05 | 2023-12-01 | MKSI | BAGSHAW SETH H | EVP, CFO, Treas | F - Tax | $84.19 | -699 | 20.7K | -3% | -$58.8K |
| DM | 2023-12-05 | 2023-12-01 | MKSI | BAGSHAW SETH H | EVP, CFO, Treas | M - OptEx | — | +699 | 21.0K | +3% | — |
| DM | 2023-12-05 | 2023-12-01 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | M - OptEx | — | +3,275 | 79.9K | +4% | — |
| D | 2023-12-05 | 2023-12-01 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | F - Tax | $84.19 | -3,275 | 78.1K | -4% | -$275.7K |
| 2023-12-04 | 2023-12-01 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $82.23 | -250 | 11.3K | -2% | -$20.6K | |
| 2023-11-08 | 2023-11-07 | MKSI | Henry David Philip | EVP, Ops, Corp Mktg | P - Purchase | $68.34 | +2,500 | 11.1K | +29% | +$170.8K | |
| 2023-10-03 | 2023-10-02 | MKSI | Mora Elizabeth | Dir | S - Sale | $87.15 | -250 | 17.4K | -1% | -$21.8K | |
| M | 2023-09-07 | 2023-09-06 | MKSI | BAGSHAW SETH H | EVP, CFO, Treas | S - Sale | $97.30 | -25.0K | 27.6K | -48% | -$2.43M |
| I | 2023-09-01 | 2023-08-31 | MKSI | COLELLA GERARD G | Dir | S - Sale | $100.01 | -10.0K | 88.0K | -10% | -$1.00M |
| 2023-08-29 | 2023-08-28 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $95.26 | -250 | 11.6K | -2% | -$23.8K | |
| M | 2023-08-08 | 2023-08-07 | MKSI | Burke Kathleen Flaherty | EVP, GC, Sec | S - Sale | $101.23 | -11.6K | 42.7K | -21% | -$1.17M |
| 2023-07-05 | 2023-07-03 | MKSI | Mora Elizabeth | Dir | S - Sale | $108.49 | -250 | 17.6K | -1% | -$27.1K | |
| 2023-06-02 | 2023-06-01 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $97.16 | -225 | 11.8K | -2% | -$21.9K | |
| 2023-06-02 | 2023-06-01 | MKSI | Mora Elizabeth | Dir | S - Sale | $97.16 | -200 | 17.9K | -1% | -$19.4K | |
| 2023-05-17 | 2023-05-16 | MKSI | Moloney Jacqueline F | Dir | A - Grant | — | +2,369 | 12.1K | +24% | — | |
| 2023-05-17 | 2023-05-16 | MKSI | Donahue Joseph B | Dir | A - Grant | — | +2,369 | 7,250 | +49% | — | |
| 2023-05-17 | 2023-05-16 | MKSI | COLELLA GERARD G | Dir | A - Grant | — | +2,369 | 4,116 | +136% | — | |
| 2023-05-17 | 2023-05-16 | MKSI | Warner Michelle M | Dir | A - Grant | — | +2,369 | 9,230 | +35% | — | |
| 2023-05-17 | 2023-05-16 | MKSI | Batra Raj | Dir | A - Grant | — | +2,369 | 11.3K | +26% | — | |
| 2023-05-17 | 2023-05-16 | MKSI | CANNONE PETER III | Dir | A - Grant | — | +2,369 | 5,511 | +75% | — | |
| 2023-05-17 | 2023-05-16 | MKSI | Mora Elizabeth | Dir | A - Grant | — | +2,369 | 18.1K | +15% | — | |
| I | 2023-05-12 | 2023-05-11 | MKSI | COLELLA GERARD G | Dir | G - Gift | $0.00 | -1,000 | 98.0K | -1% | $0 |
| I | 2023-05-10 | 2023-05-08 | MKSI | Carlyle Partners VI Cayman Holdings, L.P. | 10% | S - Sale | $86.13 | -2.00M | 6.48M | -24% | -$172.26M |
| I | 2023-05-10 | 2023-05-08 | MKSI | TC Group VI Cayman, L.L.C. | 10% | S - Sale | $86.13 | -2.00M | 6.48M | -24% | -$172.26M |
| D | 2023-04-19 | 2023-04-17 | MKSI | Gitin Mark Milton | EVP, GM, PSD | M - OptEx | — | +1,797 | 12.2K | +17% | — |
| D | 2023-04-19 | 2023-04-17 | MKSI | Gitin Mark Milton | EVP, GM, PSD | F - Tax | $82.38 | -622 | 11.6K | -5% | -$51.2K |
| D | 2023-04-19 | 2023-04-17 | MKSI | Taranto Eric Robert | EVP, GM, VSD | M - OptEx | — | +934.54 | 8,985 | +12% | — |
| D | 2023-04-19 | 2023-04-17 | MKSI | Taranto Eric Robert | EVP, GM, VSD | F - Tax | $82.38 | -275 | 8,710 | -3% | -$22.7K |
| 2023-03-16 | 2023-03-15 | MKSI | Mora Elizabeth | Dir | S - Sale | $86.67 | -200 | 15.7K | -1% | -$17.3K | |
| 2023-03-16 | 2023-03-15 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $86.67 | -225 | 9,684 | -2% | -$19.5K | |
| D | 2023-02-16 | 2023-02-15 | MKSI | Burke Kathleen Flaherty | EVP, GC, Sec | F - Tax | $100.29 | -3,474 | 54.2K | -6% | -$348.4K |
| DM | 2023-02-16 | 2023-02-15 | MKSI | Burke Kathleen Flaherty | EVP, GC, Sec | M - OptEx | — | +10.1K | 57.6K | +21% | — |
| DM | 2023-02-16 | 2023-02-15 | MKSI | Gitin Mark Milton | EVP, GM, PSD | M - OptEx | — | +3,821 | 10.8K | +55% | — |
| D | 2023-02-16 | 2023-02-15 | MKSI | Gitin Mark Milton | EVP, GM, PSD | F - Tax | $100.29 | -1,323 | 10.4K | -11% | -$132.7K |
| DM | 2023-02-16 | 2023-02-15 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | M - OptEx | — | +47.0K | 98.7K | +91% | — |
| D | 2023-02-16 | 2023-02-15 | MKSI | Lee John Tseng-Chung | Pres, CEO, Dir | F - Tax | $100.29 | -20.9K | 77.9K | -21% | -$2.09M |
| DM | 2023-02-16 | 2023-02-15 | MKSI | Taranto Eric Robert | EVP, GM, VSD | M - OptEx | — | +3,082 | 8,153 | +61% | — |
| D | 2023-02-16 | 2023-02-15 | MKSI | Taranto Eric Robert | EVP, GM, VSD | F - Tax | $100.29 | -906 | 8,051 | -10% | -$90.9K |
| DM | 2023-02-16 | 2023-02-15 | MKSI | BAGSHAW SETH H | EVP, CFO, Treas | M - OptEx | — | +18.0K | 49.9K | +56% | — |
| D | 2023-02-16 | 2023-02-15 | MKSI | BAGSHAW SETH H | EVP, CFO, Treas | F - Tax | $100.29 | -6,976 | 45.4K | -13% | -$699.6K |
| DM | 2023-02-16 | 2023-02-15 | MKSI | Henry David Philip | EVP, Ops, Corp Mktg | M - OptEx | — | +5,539 | 7,427 | +293% | — |
| D | 2023-02-16 | 2023-02-15 | MKSI | Henry David Philip | EVP, Ops, Corp Mktg | F - Tax | $100.29 | -1,629 | 8,423 | -16% | -$163.4K |
| DM | 2023-02-16 | 2023-02-15 | MKSI | Schreiner James Alan | EVP, COO, MSD | M - OptEx | — | +6,457 | 13.2K | +96% | — |
| D | 2023-02-16 | 2023-02-15 | MKSI | Schreiner James Alan | EVP, COO, MSD | F - Tax | $100.29 | -1,899 | 11.3K | -14% | -$190.5K |
| DM | 2022-12-05 | 2022-12-02 | MKSI | BAGSHAW SETH H | SVP, CFO, Treas | M - OptEx | — | +623 | 34.7K | +2% | — |
| D | 2022-12-05 | 2022-12-02 | MKSI | BAGSHAW SETH H | SVP, CFO, Treas | F - Tax | $83.86 | -623 | 34.4K | -2% | -$52.2K |
| 2022-12-02 | 2022-12-01 | MKSI | Mora Elizabeth | Dir | S - Sale | $83.86 | -200 | 15.9K | -1% | -$16.8K | |
| 2022-12-02 | 2022-12-01 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $83.86 | -225 | 9,909 | -2% | -$18.9K | |
| D | 2022-10-31 | 2022-10-28 | MKSI | Burke Kathleen Flaherty | SVP, GC, Sec | M - OptEx | — | +2,179 | 48.4K | +5% | — |
| D | 2022-10-31 | 2022-10-28 | MKSI | Burke Kathleen Flaherty | SVP, GC, Sec | F - Tax | $84.58 | -967 | 47.4K | -2% | -$81.8K |
| D | 2022-10-31 | 2022-10-28 | MKSI | BAGSHAW SETH H | SVP, CFO, Treas | F - Tax | $84.58 | -1,933 | 34.3K | -5% | -$163.5K |
| D | 2022-10-31 | 2022-10-28 | MKSI | BAGSHAW SETH H | SVP, CFO, Treas | M - OptEx | — | +4,358 | 36.2K | +14% | — |
| 2022-10-04 | 2022-10-03 | MKSI | Moloney Jacqueline F | Dir | S - Sale | $84.14 | -225 | 10.1K | -2% | -$18.9K | |
| D | 2022-09-19 | 2022-09-16 | MKSI | Schreiner James Alan | SVP, COO, MSD | F - Tax | $89.11 | -637 | 6,656 | -9% | -$56.8K |
| D | 2022-09-19 | 2022-09-16 | MKSI | Schreiner James Alan | SVP, COO, MSD | M - OptEx | — | +1,434 | 7,293 | +24% | — |
Purchase Sale Sale after option exercise All abbreviations