Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Mks Inc (MKSI) since 2015 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Mks Inc. Table 2 shows the detailed insider transactions. This company's CIK number is 1049502.
Total stock buying since 2015: $444,158.
Total stock sales since 2015: $393,690,090.
Total stock option exercises since 2015: $1,049,511.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 12,432 | $1,279,541 | 99,872 | $0 |
| 2024 | 0 | $0 | 66,368 | $8,011,097 | 135,540 | $0 |
| 2023 | 2,500 | $170,862 | 4,048,413 | $349,277,427 | 100,742 | $0 |
| 2022 | 1,250 | $147,524 | 925 | $99,981 | 81,501 | $0 |
| 2021 | 0 | $0 | 7,723 | $1,310,125 | 63,089 | $0 |
| 2020 | 0 | $0 | 54,205 | $5,821,422 | 124,953 | $0 |
| 2019 | 0 | $0 | 42,317 | $4,433,842 | 110,036 | $0 |
| 2018 | 0 | $0 | 79,945 | $8,602,447 | 151,467 | $0 |
| 2017 | 0 | $0 | 110,162 | $8,424,592 | 190,968 | $281,547 |
| 2016 | 3,500 | $125,772 | 85,135 | $3,833,674 | 86,516 | $118,628 |
| 2015 | 0 | $0 | 72,398 | $2,595,942 | 119,679 | $649,336 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2025-09 | 0 | $0 | 300 | $29,955 | 0 | $0 |
| 2025-08 | 0 | $0 | 300 | $27,630 | 3,587 | $0 |
| 2025-07 | 0 | $0 | 2,957 | $308,035 | 0 | $0 |
| 2025-06 | 0 | $0 | 300 | $24,534 | 0 | $0 |
| 2025-04 | 0 | $0 | 0 | $0 | 3,814 | $0 |
| 2025-03 | 0 | $0 | 575 | $53,163 | 0 | $0 |
| 2025-02 | 0 | $0 | 8,000 | $836,224 | 92,471 | $0 |
| 2024-12 | 0 | $0 | 575 | $65,627 | 2,994 | $0 |
| 2024-10 | 0 | $0 | 250 | $27,225 | 0 | $0 |
| 2024-09 | 0 | $0 | 275 | $31,891 | 0 | $0 |
| 2024-08 | 0 | $0 | 2,050 | $244,543 | 4,907 | $0 |
| 2024-06 | 0 | $0 | 275 | $35,587 | 0 | $0 |
| 2024-04 | 0 | $0 | 250 | $33,250 | 0 | $0 |
| 2024-03 | 0 | $0 | 7,661 | $941,459 | 0 | $0 |
| 2024-02 | 0 | $0 | 44,782 | $5,506,290 | 127,639 | $0 |
| 2024-01 | 0 | $0 | 10,250 | $1,125,225 | 0 | $0 |
| 2023-12 | 0 | $0 | 250 | $20,557 | 3,974 | $0 |
| 2023-11 | 2,500 | $170,862 | 0 | $0 | 0 | $0 |
| 2023-10 | 0 | $0 | 250 | $21,787 | 0 | $0 |
| 2023-09 | 0 | $0 | 25,000 | $2,435,300 | 0 | $0 |
| 2023-08 | 0 | $0 | 21,813 | $2,194,534 | 0 | $0 |
| 2023-07 | 0 | $0 | 250 | $27,122 | 0 | $0 |
| 2023-06 | 0 | $0 | 425 | $41,293 | 0 | $0 |
| 2023-05 | 0 | $0 | 4,000,000 | $344,500,000 | 0 | $0 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-09-02 | Mora Elizabeth (Director) | Sale | 300 | 99.85 | 29,955 |
| 2025-08-18 | Schreiner James Alan (EVP & COO) | Option Ex | 2,640 | .00 | 0 |
| 2025-08-15 | Williams John Edward (EVP & GM, PSD) | Option Ex | 947 | .00 | 0 |
| 2025-08-01 | Moloney Jacqueline F (Director) | Sale | 300 | 92.10 | 27,630 |
| 2025-07-07 | Schreiner James Alan (EVP & COO, MSD) | Sale | 957 | 102.44 | 98,035 |
| 2025-07-03 | Henry David Philip (EVP, Operations & Corp Mktg) | Sale | 2,000 | 105.00 | 210,000 |
| 2025-06-02 | Mora Elizabeth (Director) | Sale | 300 | 81.78 | 24,534 |
| 2025-04-17 | Williams John Edward (EVP & GM, PSD) | Option Ex | 1,740 | .00 | 0 |
| 2025-04-15 | Mccarthy Michelle M (VP & Chief Accounting Officer) | Option Ex | 2,074 | .00 | 0 |
| 2025-03-03 | Mora Elizabeth (Director) | Sale | 275 | 92.46 | 25,426 |
| 2025-03-03 | Moloney Jacqueline F (Director) | Sale | 300 | 92.46 | 27,737 |
| 2025-02-18 | Henry David Philip (EVP, Operations & Corp Mktg) | Option Ex | 8,013 | .00 | 0 |
| 2025-02-18 | Schreiner James Alan (EVP & COO, MSD) | Option Ex | 8,340 | .00 | 0 |
| 2025-02-18 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Option Ex | 11,645 | .00 | 0 |
| 2025-02-18 | Williams John Edward (EVP & GM, PSD) | Option Ex | 2,713 | .00 | 0 |
| 2025-02-18 | Lee John Tseng-chung (President & CEO) | Option Ex | 61,760 | .00 | 0 |
| 2025-02-18 | Colella Gerard G (Director) | Sale | 8,000 | 104.53 | 836,224 |
| 2024-12-10 | Moloney Jacqueline F (Director) | Sale | 300 | 114.80 | 34,440 |
| 2024-12-06 | Lee John Tseng-chung (President & CEO) | Option Ex | 2,994 | .00 | 0 |
| 2024-12-02 | Mora Elizabeth (Director) | Sale | 275 | 113.41 | 31,187 |
| 2024-10-01 | Moloney Jacqueline F (Director) | Sale | 250 | 108.90 | 27,225 |
| 2024-09-03 | Mora Elizabeth (Director) | Sale | 275 | 115.97 | 31,891 |
| 2024-08-19 | Schreiner James Alan (EVP & COO, MSD) | Option Ex | 3,961 | .00 | 0 |
| 2024-08-16 | Williams John Edward (EVP & GM, PSD) | Sale | 1,800 | 118.71 | 213,678 |
| 2024-08-15 | Williams John Edward (EVP & GM, PSD) | Option Ex | 946 | .00 | 0 |
| 2024-08-01 | Moloney Jacqueline F (Director) | Sale | 250 | 123.46 | 30,865 |
| 2024-06-03 | Mora Elizabeth (Director) | Sale | 275 | 129.41 | 35,587 |
| 2024-04-01 | Mora Elizabeth (Director) | Sale | 250 | 133.00 | 33,250 |
| 2024-03-01 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sale | 7,411 | 122.89 | 910,737 |
| 2024-03-01 | Moloney Jacqueline F (Director) | Sale | 250 | 122.89 | 30,722 |
| 2024-02-22 | Bagshaw Seth H (EVP, CFO & Treasurer) | Sale | 32,865 | 123.79 | 4,068,391 |
| 2024-02-16 | Moloney Jacqueline F (Director) | Sale | 1,917 | 124.10 | 237,899 |
| 2024-02-15 | Gitin Mark Milton (EVP & GM, PSD) | Option Ex | 6,841 | .00 | 0 |
| 2024-02-15 | Henry David Philip (EVP, Operations & Corp Mktg) | Option Ex | 8,022 | .00 | 0 |
| 2024-02-15 | Taranto Eric Robert (EVP & GM, VSD) | Option Ex | 5,762 | .00 | 0 |
| 2024-02-15 | Schreiner James Alan (EVP & COO, MSD) | Option Ex | 8,656 | .00 | 0 |
| 2024-02-15 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Option Ex | 12,458 | .00 | 0 |
| 2024-02-15 | Lee John Tseng-chung (President & CEO) | Option Ex | 64,534 | .00 | 0 |
| 2024-02-15 | Bagshaw Seth H (EVP, CFO & Treasurer) | Option Ex | 21,366 | .00 | 0 |
| 2024-02-09 | Colella Gerard G (Director) | Sale | 10,000 | 120.00 | 1,200,000 |
| 2024-01-22 | Colella Gerard G (Director) | Sale | 10,000 | 110.00 | 1,100,000 |
| 2024-01-02 | Mora Elizabeth (Director) | Sale | 250 | 100.90 | 25,225 |
| 2023-12-01 | Moloney Jacqueline F (Director) | Sale | 250 | 82.23 | 20,557 |
| 2023-12-01 | Lee John Tseng-chung (President & CEO) | Option Ex | 3,275 | .00 | 0 |
| 2023-12-01 | Bagshaw Seth H (EVP, CFO & Treasurer) | Option Ex | 699 | .00 | 0 |
| 2023-11-07 | Henry David Philip (EVP, Operations & Corp Mktg) | Buy | 2,500 | 68.34 | 170,862 |
| 2023-10-02 | Mora Elizabeth (Director) | Sale | 250 | 87.15 | 21,787 |
| 2023-09-06 | Bagshaw Seth H (EVP, CFO & Treasurer) | Sale | 25,000 | 97.41 | 2,435,300 |
| 2023-08-31 | Colella Gerard G (Director) | Sale | 10,000 | 100.01 | 1,000,060 |
| 2023-08-28 | Moloney Jacqueline F (Director) | Sale | 250 | 95.25 | 23,813 |
| 2023-08-07 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Sale | 11,563 | 101.24 | 1,170,661 |
| 2023-07-03 | Mora Elizabeth (Director) | Sale | 250 | 108.49 | 27,122 |
| 2023-06-01 | Mora Elizabeth (Director) | Sale | 200 | 97.16 | 19,432 |
| 2023-06-01 | Moloney Jacqueline F (Director) | Sale | 225 | 97.16 | 21,861 |
| 2023-05-08 | Cap Iv, L.l.c. (10% Owner) | Sale | 2,000,000 | 86.12 | 172,250,000 |
| 2023-05-08 | Tc Group Vi Cayman, L.p. (10% Owner) | Sale | 2,000,000 | 86.12 | 172,250,000 |
| 2023-04-17 | Gitin Mark Milton (EVP & GM, PSD) | Option Ex | 1,797 | .00 | 0 |
| 2023-04-17 | Taranto Eric Robert (EVP & GM, VSD) | Option Ex | 934 | .00 | 0 |
| 2023-03-15 | Mora Elizabeth (Director) | Sale | 200 | 86.67 | 17,334 |
| 2023-03-15 | Moloney Jacqueline F (Director) | Sale | 225 | 86.67 | 19,500 |
| 2023-02-15 | Gitin Mark Milton (EVP & GM, PSD) | Option Ex | 3,821 | .00 | 0 |
| 2023-02-15 | Henry David Philip (EVP, Operations & Corp Mktg) | Option Ex | 5,538 | .00 | 0 |
| 2023-02-15 | Taranto Eric Robert (EVP & GM, VSD) | Option Ex | 3,082 | .00 | 0 |
| 2023-02-15 | Schreiner James Alan (EVP & COO, MSD) | Option Ex | 6,457 | .00 | 0 |
| 2023-02-15 | Burke Kathleen Flaherty (EVP, GC & Secretary) | Option Ex | 10,105 | .00 | 0 |
| 2023-02-15 | Lee John Tseng-chung (President & CEO) | Option Ex | 47,030 | .00 | 0 |
| 2023-02-15 | Bagshaw Seth H (EVP, CFO & Treasurer) | Option Ex | 18,004 | .00 | 0 |
| 2022-12-02 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 623 | .00 | 0 |
| 2022-12-01 | Mora Elizabeth (Director) | Sale | 200 | 83.86 | 16,772 |
| 2022-12-01 | Moloney Jacqueline F (Director) | Sale | 225 | 83.86 | 18,868 |
| 2022-10-28 | Burke Kathleen Flaherty (Sr. VP, GC & Secretary) | Option Ex | 2,179 | .00 | 0 |
| 2022-10-28 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 4,358 | .00 | 0 |
| 2022-09-16 | Schreiner James Alan (Sr. VP & COO, MSD) | Option Ex | 1,434 | .00 | 0 |
| 2022-09-01 | Mora Elizabeth (Director) | Sale | 200 | 96.72 | 19,344 |
| 2022-08-01 | Cannone Peter Iii (Director) | Buy | 250 | 120.06 | 30,014 |
| 2022-08-01 | Colella Gerard G (Director) | Buy | 1,000 | 117.51 | 117,510 |
| 2022-04-18 | Gitin Mark Milton (SVP & GM, L&M Division) | Option Ex | 1,797 | .00 | 0 |
| 2022-04-18 | Henry David Philip (SVP, Corp Mkt, PMO & Glob Svc) | Option Ex | 479 | .00 | 0 |
| 2022-04-18 | Taranto Eric Robert (SVP & GM, V&A Division) | Option Ex | 1,721 | .00 | 0 |
| 2022-03-01 | Mora Elizabeth (Director) | Sale | 300 | 149.99 | 44,997 |
| 2022-02-15 | Gitin Mark Milton (SVP & GM, L&M Division) | Option Ex | 1,654 | .00 | 0 |
| 2022-02-15 | Henry David Philip (SVP, Corp Mkt, PMO & Glob Svc) | Option Ex | 2,912 | .00 | 0 |
| 2022-02-15 | Taranto Eric Robert (SVP & GM, V&A Division) | Option Ex | 1,161 | .00 | 0 |
| 2022-02-15 | Schreiner James Alan (Sr. VP & COO) | Option Ex | 3,655 | .00 | 0 |
| 2022-02-15 | Burke Kathleen Flaherty (Sr. VP, GC & Secretary) | Option Ex | 9,038 | .00 | 0 |
| 2022-02-15 | Lee John Tseng-chung (President & CEO) | Option Ex | 31,197 | .00 | 0 |
| 2022-02-15 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 17,010 | .00 | 0 |
| 2022-01-11 | Gitin Mark Milton (SVP & GM, L&M Division) | Option Ex | 2,283 | .00 | 0 |
| 2021-12-03 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 519 | .00 | 0 |
| 2021-12-01 | Mora Elizabeth (Director) | Sale | 300 | 155.91 | 46,773 |
| 2021-11-04 | Colella Gerard G (Director) | Sale | 3,000 | 155.16 | 465,489 |
| 2021-10-28 | Burke Kathleen Flaherty (Sr. VP, GC & Secretary) | Option Ex | 2,179 | .00 | 0 |
| 2021-10-28 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 4,358 | .00 | 0 |
| 2021-09-16 | Schreiner James Alan (Sr. VP & COO) | Option Ex | 1,434 | .00 | 0 |
| 2021-09-01 | Mora Elizabeth (Director) | Sale | 300 | 148.10 | 44,430 |
| 2021-06-01 | Mora Elizabeth (Director) | Sale | 300 | 190.00 | 57,000 |
| 2021-05-20 | Henry David Philip (SVP, Corp Mkt, PMO & Glob Svc) | Sale | 284 | 186.70 | 53,022 |
| 2021-04-30 | Gitin Mark Milton (SVP & GM, L&M Division) | Sale | 1,301 | 181.79 | 236,508 |
| 2021-04-29 | Taranto Eric Robert (SVP & GM, V&A Division) | Sale | 1,788 | 185.29 | 331,303 |
| 2021-04-19 | Gitin Mark Milton (SVP & GM, L&M Division) | Option Ex | 1,797 | .00 | 0 |
| 2021-04-19 | Taranto Eric Robert (SVP & GM, V&A Division) | Option Ex | 934 | .00 | 0 |
| 2021-04-15 | Henry David Philip (SVP, Corp Mkt, PMO & Glob Svc) | Option Ex | 479 | .00 | 0 |
| 2021-04-15 | Taranto Eric Robert (SVP & GM, V&A Division) | Option Ex | 787 | .00 | 0 |
| 2021-04-13 | Gitin Mark Milton (SVP & GM, L&M Division) | Option Ex | 712 | .00 | 0 |
| 2021-04-13 | Henry David Philip (SVP, Corp Mkt, PMO & Glob Svc) | Option Ex | 356 | .00 | 0 |
| 2021-04-13 | Taranto Eric Robert (SVP & GM, V&A Division) | Option Ex | 627 | .00 | 0 |
| 2021-03-01 | Mora Elizabeth (Director) | Sale | 450 | 168.00 | 75,600 |
| 2021-02-16 | Henry David Philip (SVP, Corp Mkt, PMO & Glob Svc) | Option Ex | 1,170 | .00 | 0 |
| 2021-02-16 | Schreiner James Alan (Sr. VP & COO) | Option Ex | 1,696 | .00 | 0 |
| 2021-02-16 | Burke Kathleen Flaherty (Sr. VP, GC & Secretary) | Option Ex | 8,110 | .00 | 0 |
| 2021-02-16 | Lee John Tseng-chung (President & CEO) | Option Ex | 22,096 | .00 | 0 |
| 2021-02-16 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 15,835 | .00 | 0 |
| 2020-12-04 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 526 | .00 | 0 |
| 2020-12-01 | Mora Elizabeth (Director) | Sale | 450 | 139.54 | 62,793 |
| 2020-09-16 | Schreiner James Alan (Sr. VP & COO) | Option Ex | 1,433 | .00 | 0 |
| 2020-09-01 | Mora Elizabeth (Director) | Sale | 450 | 120.28 | 54,126 |
| 2020-08-03 | Colella Gerard G (Director) | Sale | 6,000 | 128.37 | 770,238 |
| 2020-07-23 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Sale | 4,995 | 124.91 | 623,920 |
| 2020-07-22 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Sale | 5 | 123.00 | 615 |
| 2020-07-06 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Sale | 5,000 | 116.84 | 584,195 |
| 2020-07-02 | Colella Gerard G (Director) | Option Ex | 76,125 | .00 | 0 |
| 2020-06-01 | Mora Elizabeth (Director) | Sale | 450 | 105.09 | 47,290 |
| 2020-05-19 | Colella Gerard G (Director) | Sale | 5,000 | 100.17 | 500,860 |
| 2020-05-05 | Mora Elizabeth (Director) | Sale | 1,005 | 96.77 | 97,248 |
| 2020-05-05 | Beecher Gregory R (Director) | Sale | 18,143 | 95.95 | 1,740,766 |
| 2020-05-01 | Colella Gerard G (Director) | Sale | 5,000 | 96.55 | 482,750 |
| 2020-03-16 | Moloney Jacqueline F (Director) | Sale | 307 | 81.45 | 25,006 |
| 2020-03-02 | Mora Elizabeth (Director) | Sale | 400 | 100.68 | 40,272 |
| 2020-02-18 | Burke Kathleen Flaherty (Sr. VP, GC & Secretary) | Option Ex | 7,844 | .00 | 0 |
| 2020-02-18 | Lee John Tseng-chung (President & CEO) | Option Ex | 15,720 | .00 | 0 |
| 2020-02-18 | Colella Gerard G (Director) | Option Ex | 7,260 | .00 | 0 |
| 2020-02-18 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 16,045 | .00 | 0 |
| 2020-02-04 | Colella Gerard G (Director) | Sale | 7,000 | 113.05 | 791,343 |
| 2019-12-06 | Colella Gerard G (CEO, Director) | Option Ex | 2,606 | .00 | 0 |
| 2019-12-06 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 947 | .00 | 0 |
| 2019-12-02 | Mora Elizabeth (Director) | Sale | 400 | 106.92 | 42,768 |
| 2019-10-30 | Burke Kathleen Flaherty (Sr. VP, GC & Secretary) | Sale | 10,384 | 110.55 | 1,147,992 |
| 2019-10-29 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Sale | 18,000 | 112.08 | 2,017,440 |
| 2019-10-28 | Colella Gerard G (CEO, Director) | Sale | 5,000 | 111.03 | 555,150 |
| 2019-09-03 | Mora Elizabeth (Director) | Sale | 400 | 77.00 | 30,800 |
| 2019-08-02 | Moloney Jacqueline F (Director) | Sale | 603 | 81.98 | 49,433 |
| 2019-06-11 | Colella Gerard G (CEO, Director) | Sale | 5,000 | 75.82 | 379,090 |
| 2019-06-03 | Mora Elizabeth (Director) | Sale | 400 | 71.93 | 28,772 |
| 2019-05-08 | Moloney Jacqueline F (Director) | Sale | 256 | 85.86 | 21,980 |
| 2019-05-08 | Chute Richard S (Director) | Sale | 1,499 | 86.03 | 128,955 |
| 2019-03-01 | Mora Elizabeth (Director) | Sale | 375 | 83.90 | 31,462 |
| 2019-02-15 | Abrams John R (Sr. VP, Global Sales) | Option Ex | 10,001 | .00 | 0 |
| 2019-02-15 | Lee John Tseng-chung (President & COO) | Option Ex | 19,131 | .00 | 0 |
| 2019-02-15 | Colella Gerard G (CEO, Director) | Option Ex | 55,148 | .00 | 0 |
| 2019-02-15 | Bagshaw Seth H (Sr. VP, CFO & Treasurer) | Option Ex | 22,203 | .00 | 0 |
Insider trading activities including stock purchases, stock sales, and option exercises of MKSI listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Mks Inc (symbol MKSI, CIK number 1049502) see the Securities and Exchange Commission (SEC) website.