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MKS, Inc. provides instruments, systems, subsystems and process control solutions to measure, control, power, monitor, and analyze parameters of manufacturing processes to improve process performance and productivity for its customers. It operates through the following segments: VSD (Vacuum Solutions Division), PSD (Photonics Solutions Division), and MSD (Materials Solutions Division). The VSD segment delivers foundational technology solutions to semiconductor manufacturing, electronics and packaging and specialty industrial applications. The PSD Segment provides a range of instruments, components and subsystems to edge semiconductor manufacturing, electronics and packaging and specialty industrial applications. The MSD segment develops process and manufacturing technologies for advanced surface modification, electroless and electrolytic plating, and surface finishing. The company was founded in 1961 and is headquartered in Andover, MA. |  |
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| Insider Trading |
Relationship |
Date |
Transaction |
Cost |
#Shares |
Value ($) |
#Shares Total |
SEC Form 4 |
| COLELLA GERALD G | Director | Feb 24 '26 | Sale | 253.97 | 10,000 | 2,539,675 | 40,017 | Feb 24 02:26 PM | | COLELLA GERALD G | Director | Feb 20 '26 | Sale | 252.90 | 10,000 | 2,528,999 | 50,017 | Feb 24 02:26 PM | | Schreiner James Alan | Officer | Feb 24 '26 | Proposed Sale | 255.00 | 4,100 | 1,045,500 | | Feb 24 10:32 AM | | CANNONE PETER III | Director | Feb 20 '26 | Sale | 258.06 | 1,250 | 322,574 | 8,362 | Feb 23 02:48 PM | | Taranto Eric Robert | EVP & GM, VSD | Feb 20 '26 | Sale | 247.55 | 1,453 | 359,623 | 20,013 | Feb 23 02:39 PM | | Henry David Philip | EVP, Global Str Mktg & GM, MSD | Feb 20 '26 | Sale | 261.56 | 2,000 | 523,120 | 18,841 | Feb 23 02:38 PM | | McCarthy Michelle M | VP & Chief Accounting Officer | Feb 20 '26 | Sale | 250.00 | 1,466 | 366,503 | 0 | Feb 23 02:36 PM | | Moloney Jacqueline F | Director | Feb 20 '26 | Sale | 247.55 | 829 | 205,219 | 10,733 | Feb 23 02:32 PM | | Williams John Edward | EVP & GM, PSD | Feb 20 '26 | Sale | 256.41 | 2,043 | 523,744 | 3,640 | Feb 23 02:30 PM | | Burke Kathleen Flaherty | EVP, GC & Secretary | Feb 20 '26 | Sale | 250.00 | 4,254 | 1,063,500 | 53,794 | Feb 23 02:28 PM | | Lee John Tseng-Chung | President & CEO | Feb 20 '26 | Sale | 256.77 | 30,000 | 7,703,242 | 154,696 | Feb 23 02:25 PM | | Gerald Colella 2019 Trust u/a | Director | Feb 20 '26 | Proposed Sale | 252.90 | 20,000 | 5,057,996 | | Feb 20 04:20 PM | | Henry David Philip | Officer | Feb 20 '26 | Proposed Sale | 261.56 | 2,000 | 523,120 | | Feb 20 02:59 PM | | CANNONE PETER III | Director | Feb 20 '26 | Proposed Sale | 258.06 | 1,250 | 322,574 | | Feb 20 01:53 PM | | Lee John Tseng-Chung | Officer | Feb 20 '26 | Proposed Sale | 247.55 | 30,000 | 7,426,500 | | Feb 20 12:09 PM | | Williams John Edward | Officer | Feb 20 '26 | Proposed Sale | 256.36 | 2,043 | 523,744 | | Feb 20 11:23 AM | | Taranto Eric Robert | Officer | Feb 20 '26 | Proposed Sale | 247.50 | 1,453 | 359,623 | | Feb 20 11:08 AM | | McCarthy Michelle M | Officer | Feb 20 '26 | Proposed Sale | 250.00 | 1,466 | 366,503 | | Feb 20 11:06 AM | | Burke Kathleen Flaherty | Officer | Feb 20 '26 | Proposed Sale | 250.00 | 4,254 | 1,063,500 | | Feb 20 11:03 AM | | Moloney Jacqueline F | Director | Feb 20 '26 | Proposed Sale | 247.55 | 829 | 205,219 | | Feb 20 10:55 AM | | Mora Elizabeth | Director | Dec 02 '25 | Sale | 158.81 | 300 | 47,643 | 18,963 | Dec 03 11:39 AM | | Mora Elizabeth | Director | Dec 02 '25 | Proposed Sale | 158.81 | 300 | 47,643 | | Dec 02 10:05 AM | | Schreiner James Alan | EVP & COO | Oct 22 '25 | Sale | 138.68 | 711 | 98,601 | 22,535 | Oct 23 02:43 PM | | Schreiner James Alan | Officer | Oct 22 '25 | Proposed Sale | 138.68 | 711 | 98,601 | | Oct 22 09:37 AM | | Moloney Jacqueline F | Director | Oct 01 '25 | Sale | 122.14 | 300 | 36,642 | 11,562 | Oct 02 02:00 PM | | Moloney Jacqueline F | Director | Oct 01 '25 | Proposed Sale | 122.14 | 300 | 36,642 | | Oct 01 09:48 AM | | Schreiner James Alan | EVP & COO | Sep 18 '25 | Sale | 124.00 | 838 | 103,912 | 23,246 | Sep 19 02:21 PM | | Henry David Philip | EVP, Global Str Mktg & GM, MSD | Sep 18 '25 | Sale | 130.00 | 5,000 | 650,000 | 15,571 | Sep 19 02:18 PM | | Henry David Philip | Officer | Sep 18 '25 | Proposed Sale | 130.00 | 5,000 | 650,000 | | Sep 18 12:54 PM | | Schreiner James Alan | Officer | Sep 18 '25 | Proposed Sale | 124.00 | 838 | 103,912 | | Sep 18 10:02 AM | | Mora Elizabeth | Director | Sep 02 '25 | Sale | 99.85 | 300 | 29,955 | 19,263 | Sep 03 01:40 PM | | Mora Elizabeth | Director | Sep 02 '25 | Proposed Sale | 99.85 | 300 | 29,955 | | Sep 02 12:10 PM | | Moloney Jacqueline F | Director | Aug 01 '25 | Sale | 92.10 | 300 | 27,630 | 11,862 | Aug 04 11:30 AM | | Moloney Jacqueline F | Director | Aug 01 '25 | Proposed Sale | 92.10 | 300 | 27,630 | | Aug 01 10:56 AM | | Schreiner James Alan | EVP & COO, MSD | Jul 07 '25 | Sale | 102.44 | 957 | 98,035 | 22,692 | Jul 08 04:45 PM | | Henry David Philip | EVP, Operations & Corp Mktg | Jul 03 '25 | Sale | 105.00 | 2,000 | 210,000 | 20,571 | Jul 07 04:07 PM | | Schreiner James Alan | Officer | Jul 07 '25 | Proposed Sale | 102.44 | 957 | 98,035 | | Jul 07 01:31 PM | | Henry David Philip | Officer | Jul 03 '25 | Proposed Sale | 105.00 | 2,000 | 210,000 | | Jul 03 10:32 AM | | Mora Elizabeth | Director | Jun 02 '25 | Sale | 81.78 | 300 | 24,534 | 19,563 | Jun 03 02:53 PM | | Mora Elizabeth | Director | Jun 02 '25 | Proposed Sale | 81.78 | 300 | 24,534 | | Jun 02 11:19 AM | | Mora Elizabeth | Director | Mar 03 '25 | Sale | 92.46 | 275 | 25,426 | 17,384 | Mar 04 02:54 PM | | Moloney Jacqueline F | Director | Mar 03 '25 | Sale | 92.46 | 300 | 27,738 | 9,683 | Mar 04 02:49 PM | | Moloney Jacqueline F | Director | Mar 03 '25 | Proposed Sale | 92.46 | 300 | 27,738 | | Mar 03 10:25 AM | | Mora Elizabeth | Director | Mar 03 '25 | Proposed Sale | 92.46 | 275 | 25,426 | | Mar 03 10:07 AM |
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