MKS INC
MKSI
53 insider filings · Latest: Aug 14, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| Feb 24, 2026 | Feb 25 4:50 PM | James Alan SchreinerEVP & COO | Sale | 4,100 | $255.00 | $1.0M | 23,401.962(D) | View → |
| Feb 24, 2026 | Feb 24 7:26 PM | Gerald G ColellaDirector | Sale | 10,000 | $253.97 | $2.5M | 40,017(I) | View → |
| Feb 20, 2026 | Feb 24 7:26 PM | Gerald G ColellaDirector | Sale | 10,000 | $252.90 | $2.5M | 50,017(I) | View → |
| Feb 24, 2026 | Feb 24 3:32 PM | Schreiner James Alan | Proposed Sale | 4,100 | $255.00 | $1.0M | — | View → |
| Feb 20, 2026 | Feb 23 7:48 PM | Peter Cannone IIIDirector | Sale | 1,250 | $258.06 | $322.6K | 8,362.08(D) | View → |
| Feb 20, 2026 | Feb 23 7:39 PM | Eric Robert TarantoEVP & GM, VSD | Sale | 1,452.73 | $247.55 | $359.6K | 20,012.64(D) | View → |
| Feb 20, 2026 | Feb 23 7:38 PM | David Philip HenryEVP, Global Str Mktg & GM, MSD | Sale | 2,000 | $261.56 | $523.1K | 18,841.368(D) | View → |
| Feb 20, 2026 | Feb 23 7:36 PM | Michelle M MccarthyVP & Chief Accounting Officer | Sale | 1,466 | $250.00 | $366.5K | 0(D) | View → |
| Feb 20, 2026 | Feb 23 7:32 PM | Jacqueline F MoloneyDirector | Sale | 829 | $247.55 | $205.2K | 10,733.304(D) | View → |
| Feb 20, 2026 | Feb 23 7:30 PM | John Edward WilliamsEVP & GM, PSD | Sale | 2,042.625 | $256.41 | $523.7K | 3,640.099(D) | View → |
| Feb 20, 2026 | Feb 23 7:28 PM | Kathleen Flaherty BurkeEVP, GC & Secretary | Sale | 4,254 | $250.00 | $1.1M | 53,794.485(D) | View → |
| Feb 20, 2026 | Feb 23 7:25 PM | John Tseng-Chung LeeDirector, President & CEO | Sale | 30,000 | $256.77 | $7.7M | 154,696.108(D) | View → |
| Feb 20, 2026 | Feb 20 9:20 PM | Gerald Colella 2019 Trust u/a dtd 5/4/2019 | Proposed Sale | 20,000 | $252.90 | $5.1M | — | View → |
| Feb 20, 2026 | Feb 20 7:59 PM | Henry David Philip | Proposed Sale | 2,000 | $261.56 | $523.1K | — | View → |
| Feb 20, 2026 | Feb 20 6:53 PM | CANNONE PETER III | Proposed Sale | 1,250 | $258.06 | $322.6K | — | View → |
| Feb 20, 2026 | Feb 20 5:09 PM | Lee John Tseng-Chung | Proposed Sale | 30,000 | $247.55 | $7.4M | — | View → |
| Feb 20, 2026 | Feb 20 4:23 PM | Williams John Edward | Proposed Sale | 2,043 | $256.36 | $523.7K | — | View → |
| Feb 20, 2026 | Feb 20 4:08 PM | Taranto Eric Robert | Proposed Sale | 1,453 | $247.50 | $359.6K | — | View → |
| Feb 20, 2026 | Feb 20 4:06 PM | McCarthy Michelle M | Proposed Sale | 1,466 | $250.00 | $366.5K | — | View → |
| Feb 20, 2026 | Feb 20 4:03 PM | Burke Kathleen Flaherty | Proposed Sale | 4,254 | $250.00 | $1.1M | — | View → |
Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Feb 8, 2026 | Feb 9 7:00 PM | John Edward WilliamsEVP & GM, PSD | Grant/Award | 2,973.357 | — | 10,317.107(D) | View → |
| Feb 8, 2026 | Feb 9 6:56 PM | Kathleen Flaherty BurkeEVP, GC & Secretary | Grant/Award | 7,008.628 | — | 24,007.365(D) | View → |
| Feb 8, 2026 | Feb 9 6:54 PM | Ramakumar MayampurathEVP & CFO | Grant/Award | 8,877.596 | — | 25,279.99(D) | View → |
| Feb 8, 2026 | Feb 9 6:51 PM | John Tseng-Chung LeeDirector, President & CEO | Grant/Award | 50,971.84 | — | 139,124.462(D) | View → |
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