MKS INC
MKSI
55 insider filings · Latest: Sep 1, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| Mar 2, 2026 | Mar 3 5:18 PM | Elizabeth MoraDirector | Sale | 300 | $239.44 | $71.8K | 18,663.394(D) | View → |
| Mar 2, 2026 | Mar 2 5:07 PM | Mora Elizabeth | Proposed Sale | 300 | $239.44 | $71.8K | — | View → |
| 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 → |
Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Aug 17, 2026 | Aug 18 6:07 PM | Renee Martel DonlanEVP, GC & CCO | Grant/Award | 954.044 | — | 4,780.571(D) | View → |
| Apr 17, 2026 | Apr 20 3:31 PM | John Edward WilliamsEVP & GM, PSD | Option Exercise | 1,740.714 | — | 6,812.003(D) | View → |
| Apr 15, 2026 | Apr 16 7:29 PM | Michelle M MccarthySVP & Chief Accounting Officer | Grant/Award | 1,672.862 | — | 11,199.16(D) | View → |
| Apr 15, 2026 | Apr 16 7:29 PM | Michelle M MccarthySVP & Chief Accounting Officer | Option Exercise | 3,811 | — | 7,388.16(D) | View → |
| Feb 17, 2026 | Feb 18 10:07 PM | Eric Robert TarantoEVP & GM, VSD | Grant/Award | 1,758.956 | — | 14,501.557(D) | View → |
| Feb 17, 2026 | Feb 18 10:07 PM | Eric Robert TarantoEVP & GM, VSD | Option Exercise | 6,472.891 | — | 8,028.666(D) | View → |
| Feb 17, 2026 | Feb 18 10:05 PM | David Philip HenryEVP, Global Str Mktg & GM, MSD | Option Exercise | 9,281.817 | — | 12,093.416(D) | View → |
| Feb 17, 2026 | Feb 18 10:05 PM | David Philip HenryEVP, Global Str Mktg & GM, MSD | Grant/Award | 2,567.126 | — | 21,375.233(D) | View → |
| Feb 17, 2026 | Feb 18 10:02 PM | James Alan SchreinerEVP & COO | Option Exercise | 9,225.392 | — | 11,396.475(D) | View → |
| Feb 17, 2026 | Feb 18 10:02 PM | James Alan SchreinerEVP & COO | Grant/Award | 2,376.968 | — | 20,621.867(D) | View → |
| Feb 17, 2026 | Feb 18 10:00 PM | John Edward WilliamsEVP & GM, PSD | Option Exercise | 3,238.11 | — | 8,552.717(D) | View → |
| Feb 17, 2026 | Feb 18 10:00 PM | John Edward WilliamsEVP & GM, PSD | Grant/Award | 1,473.72 | — | 11,790.827(D) | View → |
| Feb 17, 2026 | Feb 18 9:58 PM | Ramakumar MayampurathEVP & CFO | Option Exercise | 5,660.08 | — | 23,898.453(D) | View → |
| Feb 17, 2026 | Feb 18 9:58 PM | Ramakumar MayampurathEVP & CFO | Grant/Award | 4,278.543 | — | 29,558.533(D) | View → |
| Feb 17, 2026 | Feb 18 9:55 PM | Kathleen Flaherty BurkeEVP, GC & Secretary | Grant/Award | 3,327.755 | — | 27,335.12(D) | View → |
| Feb 17, 2026 | Feb 18 9:55 PM | Kathleen Flaherty BurkeEVP, GC & Secretary | Option Exercise | 12,206.134 | — | 15,128.986(D) | View → |
| Feb 17, 2026 | Feb 18 9:52 PM | John Tseng-Chung LeeDirector, President & CEO | Option Exercise | 69,889.252 | — | 84,828.121(D) | View → |
| Feb 17, 2026 | Feb 18 9:52 PM | John Tseng-Chung LeeDirector, President & CEO | Grant/Award | 15,592.911 | — | 154,717.373(D) | View → |
| Feb 8, 2026 | Feb 9 7:08 PM | Eric Robert TarantoEVP & GM, VSD | Grant/Award | 3,504.314 | — | 12,742.601(D) | View → |
| Feb 8, 2026 | Feb 9 7:06 PM | David Philip HenryEVP, Global Str Mktg & GM, MSD | Grant/Award | 5,521.949 | — | 18,808.107(D) | View → |
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