MKSI Insider Transactions
1,121 retained open-market purchase and sale rows from SEC Forms 3, 4 and 5, newest first. This page shows rows 1–100; provenance stays internal.
MKSI insiders transaction timeline
PurchaseSale
| Insider profile | Role | Date | Transaction | Shares | Price |
|---|
| Lee John Tseng-Chung | President & CEO | 2026-08-14 | Sale | 10,000 | $302.01 |
|---|
| Williams John Edward | EVP & GM, PSD | 2026-08-03 | Sale | 457 | $288.31 |
|---|
| Schreiner James Alan | EVP & COO | 2026-06-12 | Sale | 217.0 | $347.0 |
|---|
| Schreiner James Alan | EVP & COO | 2026-06-12 | Sale | 812.0 | $346.41 |
|---|
| Schreiner James Alan | EVP & COO | 2026-06-12 | Sale | 2,471.0 | $345.52 |
|---|
| Schreiner James Alan | EVP & COO | 2026-06-10 | Sale | 781.0 | $317.42 |
|---|
| McCarthy Michelle M | SVP & Chief Accounting Officer | 2026-06-05 | Sale | 2,434.0 | $315.23 |
|---|
| Henry David Philip | EVP, Global Str Mktg & GM, MSD | 2026-06-01 | Sale | 6,000.0 | $314.43 |
|---|
| Mora Elizabeth | Director | 2026-06-01 | Sale | 300.0 | $318.02 |
|---|
| Donahue Joseph B | Director | 2026-05-27 | Sale | 2,100.0 | $327.95 |
|---|
| COLELLA GERALD G | Director | 2026-05-27 | Sale | 2,800.0 | $338.58 |
|---|
| COLELLA GERALD G | Director | 2026-05-27 | Sale | 213.0 | $337.05 |
|---|
| COLELLA GERALD G | Director | 2026-05-27 | Sale | 1,626.0 | $336.54 |
|---|
| COLELLA GERALD G | Director | 2026-05-27 | Sale | 1,811.0 | $335.46 |
|---|
| COLELLA GERALD G | Director | 2026-05-27 | Sale | 4,876.0 | $332.04 |
|---|
| COLELLA GERALD G | Director | 2026-05-27 | Sale | 8,210.0 | $331.45 |
|---|
| COLELLA GERALD G | Director | 2026-05-27 | Sale | 464.0 | $330.38 |
|---|
| Henry David Philip | EVP, Global Str Mktg & GM, MSD | 2026-05-26 | Sale | 2,500.0 | $330.5 |
|---|
| Mayampurath Ramakumar | EVP & CFO | 2026-05-22 | Sale | 8,810.0 | $315.48 |
|---|
| Lee John Tseng-Chung | President & CEO | 2026-05-22 | Sale | 10,000.0 | $315.48 |
|---|
| CANNONE PETER III | Director | 2026-05-18 | Sale | 1,350.0 | $303.4 |
|---|
| Moloney Jacqueline F | Director | 2026-05-14 | Sale | 1,000.0 | $312.2 |
|---|
| Moloney Jacqueline F | Director | 2026-05-13 | Sale | 1,400.0 | $318.99 |
|---|
| Taranto Eric Robert | EVP & GM, VSD | 2026-05-11 | Sale | 2,848.52 | $319.93 |
|---|
| Burke Kathleen Flaherty | EVP, GC & Secretary | 2026-05-11 | Sale | 4,355.0 | $319.94 |
|---|
| Moloney Jacqueline F | Director | 2026-03-12 | Sale | 340.11 | $213.77 |
|---|
| Taranto Eric Robert | EVP & GM, VSD | 2026-03-06 | Sale | 4,567.88 | $220.52 |
|---|
| Mora Elizabeth | Director | 2026-03-02 | Sale | 300.0 | $239.44 |
|---|
| Schreiner James Alan | EVP & COO | 2026-02-24 | Sale | 4,100.0 | $255.0 |
|---|
| COLELLA GERALD G | Director | 2026-02-24 | Sale | 10,000.0 | $253.97 |
|---|
| COLELLA GERALD G | Director | 2026-02-20 | Sale | 10,000.0 | $252.9 |
|---|
| CANNONE PETER III | Director | 2026-02-20 | Sale | 1,250.0 | $258.06 |
|---|
| Taranto Eric Robert | EVP & GM, VSD | 2026-02-20 | Sale | 1,452.73 | $247.55 |
|---|
| Henry David Philip | EVP, Global Str Mktg & GM, MSD | 2026-02-20 | Sale | 2,000.0 | $261.56 |
|---|
| McCarthy Michelle M | VP & Chief Accounting Officer | 2026-02-20 | Sale | 816.0 | $250.35 |
|---|
| McCarthy Michelle M | VP & Chief Accounting Officer | 2026-02-20 | Sale | 650.0 | $249.57 |
|---|
| Moloney Jacqueline F | Director | 2026-02-20 | Sale | 829.0 | $247.55 |
|---|
| Williams John Edward | EVP & GM, PSD | 2026-02-20 | Sale | 2,042.63 | $256.41 |
|---|
| Burke Kathleen Flaherty | EVP, GC & Secretary | 2026-02-20 | Sale | 4,254.0 | $250.0 |
|---|
| Lee John Tseng-Chung | President & CEO | 2026-02-20 | Sale | 1,890.0 | $259.7 |
|---|
| Lee John Tseng-Chung | President & CEO | 2026-02-20 | Sale | 1,988.0 | $257.81 |
|---|
| Lee John Tseng-Chung | President & CEO | 2026-02-20 | Sale | 12,812.0 | $256.93 |
|---|
| Lee John Tseng-Chung | President & CEO | 2026-02-20 | Sale | 13,310.0 | $256.05 |
|---|
| Mora Elizabeth | Director | 2025-12-02 | Sale | 300.0 | $158.81 |
|---|
| Schreiner James Alan | EVP & COO | 2025-10-22 | Sale | 711.0 | $138.68 |
|---|
| Moloney Jacqueline F | Director | 2025-10-01 | Sale | 300.0 | $122.14 |
|---|
| Schreiner James Alan | EVP & COO | 2025-09-18 | Sale | 838.0 | $124.0 |
|---|
| Henry David Philip | EVP, Global Str Mktg & GM, MSD | 2025-09-18 | Sale | 5,000.0 | $130.0 |
|---|
| Mora Elizabeth | Director | 2025-09-02 | Sale | 300.0 | $99.85 |
|---|
| Moloney Jacqueline F | Director | 2025-08-01 | Sale | 300.0 | $92.1 |
|---|
| Schreiner James Alan | EVP & COO, MSD | 2025-07-07 | Sale | 957.0 | $102.44 |
|---|
| Henry David Philip | EVP, Operations & Corp Mktg | 2025-07-03 | Sale | 2,000.0 | $105.0 |
|---|
| Mora Elizabeth | Director | 2025-06-02 | Sale | 300.0 | $81.78 |
|---|
| Mora Elizabeth | Director | 2025-03-03 | Sale | 275.0 | $92.46 |
|---|
| Moloney Jacqueline F | Director | 2025-03-03 | Sale | 300.0 | $92.46 |
|---|
| COLELLA GERARD G | Director | 2025-02-18 | Sale | 8,000.0 | $104.53 |
|---|
| Moloney Jacqueline F | Director | 2024-12-10 | Sale | 300.0 | $114.8 |
|---|
| Mora Elizabeth | Director | 2024-12-02 | Sale | 275.0 | $113.41 |
|---|
| Moloney Jacqueline F | Director | 2024-10-01 | Sale | 250.0 | $108.9 |
|---|
| Mora Elizabeth | Director | 2024-09-03 | Sale | 275.0 | $115.97 |
|---|
| Williams John Edward | EVP & GM, PSD | 2024-08-16 | Sale | 1,800.0 | $118.71 |
|---|
| Moloney Jacqueline F | Director | 2024-08-01 | Sale | 250.0 | $123.46 |
|---|
| Mora Elizabeth | Director | 2024-06-03 | Sale | 275.0 | $129.41 |
|---|
| Mora Elizabeth | Director | 2024-04-01 | Sale | 250.0 | $133.0 |
|---|
| Moloney Jacqueline F | Director | 2024-03-01 | Sale | 250.0 | $122.89 |
|---|
| Burke Kathleen Flaherty | EVP, GC & Secretary | 2024-03-01 | Sale | 7,411.0 | $122.89 |
|---|
| BAGSHAW SETH H | EVP, CFO & Treasurer | 2024-02-22 | Sale | 1,000.0 | $124.56 |
|---|
| BAGSHAW SETH H | EVP, CFO & Treasurer | 2024-02-22 | Sale | 11,612.0 | $124.02 |
|---|
| BAGSHAW SETH H | EVP, CFO & Treasurer | 2024-02-22 | Sale | 20,253.0 | $122.79 |
|---|
| Moloney Jacqueline F | Director | 2024-02-16 | Sale | 1,917.27 | $124.1 |
|---|
| COLELLA GERARD G | Director | 2024-02-09 | Sale | 10,000.0 | $120.0 |
|---|
| COLELLA GERARD G | Director | 2024-01-22 | Sale | 10,000.0 | $110.0 |
|---|
| Mora Elizabeth | Director | 2024-01-02 | Sale | 250.0 | $100.9 |
|---|
| Moloney Jacqueline F | Director | 2023-12-01 | Sale | 250.0 | $82.23 |
|---|
| Henry David Philip | EVP, Operations & Corp Mktg | 2023-11-07 | Purchase | 2,500.0 | $68.34 |
|---|
| Mora Elizabeth | Director | 2023-10-02 | Sale | 250.0 | $87.15 |
|---|
| BAGSHAW SETH H | EVP, CFO & Treasurer | 2023-09-06 | Sale | 7,073.0 | $97.66 |
|---|
| BAGSHAW SETH H | EVP, CFO & Treasurer | 2023-09-06 | Sale | 17,927.0 | $97.16 |
|---|
| COLELLA GERARD G | Director | 2023-08-31 | Sale | 10,000.0 | $100.01 |
|---|
| Moloney Jacqueline F | Director | 2023-08-28 | Sale | 250.0 | $95.26 |
|---|
| Burke Kathleen Flaherty | EVP, GC & Secretary | 2023-08-07 | Sale | 5,377.07 | $101.4 |
|---|
| Burke Kathleen Flaherty | EVP, GC & Secretary | 2023-08-07 | Sale | 6,186.0 | $101.08 |
|---|
| Mora Elizabeth | Director | 2023-07-03 | Sale | 250.0 | $108.49 |
|---|
| Mora Elizabeth | Director | 2023-06-01 | Sale | 200.0 | $97.16 |
|---|
| Moloney Jacqueline F | Director | 2023-06-01 | Sale | 225.0 | $97.16 |
|---|
| Carlyle Asia Partners IV, L.P. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| Carlyle Partners VI Cayman Holdings, L.P. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| Gamma Holding Co Ltd | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| CEP IV Participations, S.a r.l. SICAR | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| CEP IV Managing GP, L.P. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| CEP IV Managing GP Holdings, Ltd. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| CAP IV General Partner, L.P. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| CAP IV, L.L.C. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| TC Group Cayman Investment Holdings, L.P. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| Carlyle Group Inc. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| Carlyle Holdings II GP L.L.C. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| Carlyle Holdings II L.L.C. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| TC Group Cayman Investment Holdings Sub L.P. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| CG Subsidiary Holdings L.L.C. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
|---|
| TC Group VI Cayman, L.L.C. | TenPercentOwner | 2023-05-08 | Sale | 2,000,000.0 | $86.13 |
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