MKS INC — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Mora Elizabeth | — | Sale | 300 | $158.81 | $47,643 | 18,963 | Dec 2, 2025 |
| Mayampurath Ramakumar | EVP & CFO | Option Exercise | 8,295 | — | — | 8,295 | Nov 17, 2025 |
| Burke Kathleen Flaherty | EVP, GC & Secretary | Option Exercise | 158 | — | — | 51,233 | Oct 31, 2025 |
| Lee John Tseng-Chung | President & CEO | Option Exercise | 352 | — | — | 147,622 | Oct 31, 2025 |
| Schreiner James Alan | EVP & COO | Sale | 711 | $138.68 | $98,601 | 22,535 | Oct 22, 2025 |
| Moloney Jacqueline F | — | Sale | 300 | $122.14 | $36,642 | 11,562 | Oct 1, 2025 |
| Schreiner James Alan | EVP & COO | Sale | 838 | $124.00 | $103,912 | 23,246 | Sep 18, 2025 |
| Henry David Philip | EVP, Global Str Mktg & GM, MSD | Sale | 5,000 | $130.00 | $650,000 | 15,571 | Sep 18, 2025 |
| Mora Elizabeth | — | Sale | 300 | $99.85 | $29,955 | 19,263 | Sep 2, 2025 |
| Schreiner James Alan | EVP & COO | Tax Withholding | 1,249 | $100.22 | $125,175 | 24,084 | Aug 18, 2025 |
| Williams John Edward | EVP & GM, PSD | Tax Withholding | 308 | $104.73 | $32,257 | 3,640 | Aug 15, 2025 |
| Moloney Jacqueline F | — | Sale | 300 | $92.10 | $27,630 | 11,862 | Aug 1, 2025 |
| Schreiner James Alan | EVP & COO, MSD | Sale | 957 | $102.44 | $98,035 | 22,692 | Jul 7, 2025 |
| Henry David Philip | EVP, Operations & Corp Mktg | Sale | 2,000 | $105.00 | $210,000 | 20,571 | Jul 3, 2025 |
| Mora Elizabeth | — | Sale | 300 | $81.78 | $24,534 | 19,563 | Jun 2, 2025 |
| Mora Elizabeth | — | Award / Grant | 2,479 | — | — | 19,863 | May 12, 2025 |
| Moloney Jacqueline F | — | Award / Grant | 2,479 | — | — | 12,162 | May 12, 2025 |
| JABRE WISSAM G | — | Award / Grant | 2,479 | — | — | 4,488 | May 12, 2025 |
| Donahue Joseph B | — | Award / Grant | 2,479 | — | — | 11,351 | May 12, 2025 |
| CANNONE PETER III | — | Award / Grant | 2,479 | — | — | 9,612 | May 12, 2025 |
| Batra Raj | — | Award / Grant | 2,479 | — | — | 15,445 | May 12, 2025 |
| COLELLA GERARD G | — | Award / Grant | 2,479 | — | — | 8,217 | May 12, 2025 |
| Williams John Edward | EVP & GM, PSD | Tax Withholding | 565 | $63.69 | $35,985 | 3,001 | Apr 17, 2025 |
| McCarthy Michelle M | VP & Chief Accounting Officer | Option Exercise | 968 | — | — | 968 | Apr 15, 2025 |
| Mora Elizabeth | — | Sale | 275 | $92.46 | $25,427 | 17,384 | Mar 3, 2025 |
| Moloney Jacqueline F | — | Sale | 300 | $92.46 | $27,738 | 9,683 | Mar 3, 2025 |
| Williams John Edward | EVP & GM, PSD | Option Exercise | 658 | — | — | 1,586 | Feb 18, 2025 |
| Taranto Eric Robert | EVP & GM, VSD | Option Exercise | 1,119 | — | — | 14,421 | Feb 18, 2025 |
| Schreiner James Alan | EVP & COO, MSD | Tax Withholding | 3,648 | $103.67 | $378,188 | 23,497 | Feb 18, 2025 |
| Henry David Philip | EVP, Operations & Corp Mktg | Option Exercise | 1,528 | — | — | 18,306 | Feb 18, 2025 |
| Burke Kathleen Flaherty | EVP, GC & Secretary | Option Exercise | 588 | — | — | 53,244 | Feb 18, 2025 |
| Lee John Tseng-Chung | President & CEO | Option Exercise | 14,041 | — | — | 126,730 | Feb 18, 2025 |
| COLELLA GERARD G | — | Sale | 8,000 | $104.53 | $836,240 | 60,017 | Feb 18, 2025 |
| Moloney Jacqueline F | — | Sale | 300 | $114.80 | $34,440 | 9,983 | Dec 10, 2024 |
| Lee John Tseng-Chung | President & CEO | Option Exercise | 2,010 | — | — | 114,699 | Dec 6, 2024 |
| Mora Elizabeth | — | Sale | 275 | $113.41 | $31,188 | 17,659 | Dec 2, 2024 |
| JABRE WISSAM G | — | Award / Grant | 2,009 | — | — | 2,009 | Nov 4, 2024 |
| Moloney Jacqueline F | — | Sale | 250 | $108.90 | $27,225 | 10,283 | Oct 1, 2024 |
| Mora Elizabeth | — | Sale | 275 | $115.97 | $31,892 | 17,934 | Sep 3, 2024 |
| Schreiner James Alan | EVP & COO, MSD | Tax Withholding | 1,873 | $119.09 | $223,056 | 18,705 | Aug 19, 2024 |
| Williams John Edward | EVP & GM, PSD | Sale | 1,800 | $118.71 | $213,678 | 13 | Aug 16, 2024 |
| Williams John Edward | EVP & GM, PSD | Tax Withholding | 307 | $113.91 | $34,970 | 1,813 | Aug 15, 2024 |
| Moloney Jacqueline F | — | Sale | 250 | $123.46 | $30,865 | 10,533 | Aug 1, 2024 |
| Mora Elizabeth | — | Sale | 275 | $129.41 | $35,588 | 18,209 | Jun 3, 2024 |
| Warner Michelle M | — | Award / Grant | 1,622 | — | — | 10,852 | May 7, 2024 |
| Moloney Jacqueline F | — | Award / Grant | 1,622 | — | — | 10,783 | May 7, 2024 |
| Mora Elizabeth | — | Award / Grant | 1,622 | — | — | 18,484 | May 7, 2024 |
| Donahue Joseph B | — | Award / Grant | 1,622 | — | — | 8,871 | May 7, 2024 |
| CANNONE PETER III | — | Award / Grant | 1,622 | — | — | 7,133 | May 7, 2024 |
| Batra Raj | — | Award / Grant | 1,622 | — | — | 12,966 | May 7, 2024 |