List of insiders holdings for MKS INC:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | Carlyle Partners VI Cayman Holdings L.P. CEP IV Managing GP Holdings Ltd. CAP IV General Partner L.P. Carlyle Asia Partners IV L.P. Gamma Holding Co Ltd CEP IV Participations S.a r.l. SICAR CEP IV Managing GP L.P. CAP IV L.L.C. 10% Owner | 2023-05-10 16:59:52 | 0 6,482,732 | 6,482,732 | Form 4 |
| 2 | EMERSON ELECTRIC CO ASTEC AMERICA INC 10% Owner | 2007-01-17 16:03:17 | 2,751,143 0 | 2,751,143 | Form 13D |
| 3 | EMERSON ELECTRIC CO 10% Owner | 2007-01-17 16:03:17 | 2,751,143 0 | 2,751,143 | Form 13D |
| 4 | BERTUCCI CLAIRE R Spouse of Chairman | 2011-02-11 11:54:40 | 1,366,157 0 | 1,366,157 | Form 13G |
| 5 | BERTUCCI JOHN R Director | 2019-05-09 16:48:10 | 67,275 301,755 | 369,030 | Form 4 |
| 6 | BERLINGHIERI LEO Former CEO and Director | 2014-01-02 12:36:56 | 202,123 0 | 202,123 | Form 4 |
| 7 | SMITH DONALD K V.P. & CTO | 2004-02-04 14:41:58 | 157,286 0 | 157,286 | Form 5 |
| 8 | Lee John Tseng-Chung President & CEO | 2026-02-23 14:25:50 | 154,696 0 | 154,696 | Form 4 |
| 9 | Gitin Mark Milton EVP & GM, PSD | 2024-02-16 15:10:39 | 119,659 0 | 119,659 | Form 4 |
| 10 | WILD GEOFFREY Director | 2022-08-18 17:26:17 | 1,813 105,807 | 107,620 | Form 4 |
| 11 | Mayampurath Ramakumar EVP & CFO | 2026-02-18 16:58:25 | 88,869 0 | 88,869 | Form 4 |
| 12 | Hadar Ron V.P. General Manager CIT Prod. | 2007-06-07 11:41:03 | 84,063 0 | 84,063 | Form 4 |
| 13 | Burke Kathleen Flaherty EVP, GC & Secretary | 2026-02-23 14:28:00 | 53,794 0 | 53,794 | Form 4 |
| 14 | COLELLA GERALD G Director | 2026-02-24 14:26:45 | 8,217 40,017 | 48,234 | Form 4 |
| 15 | KLIMM ROBERT L V.P. & General Manager | 2007-05-01 15:38:25 | 42,312 0 | 42,312 | Form 4 |
| 16 | Abrams John R Sr. VP, Global Sales | 2019-02-19 18:14:58 | 36,893 0 | 36,893 | Form 4 |
| 17 | Werth Dennis L Sr. VP, Business Units | 2018-04-03 13:04:13 | 18,756 15,944 | 34,700 | Form 4 |
| 18 | Schneider Frank VP and GM Ion Systems | 2007-08-27 10:04:54 | 30,412 0 | 30,412 | Form 4 |
| 19 | Amon Cristina Director | 2015-12-17 13:12:09 | 29,283 0 | 29,283 | Form 4 |
| 20 | Schreiner James Alan EVP & COO | 2026-02-25 11:50:07 | 23,402 0 | 23,402 | Form 4 |
| 21 | Henry David Philip EVP, Global Str Mktg & GM, MSD | 2026-02-23 14:38:23 | 18,841 0 | 18,841 | Form 4 |
| 22 | Mora Elizabeth Director | 2026-03-03 12:18:32 | 18,663 0 | 18,663 | Form 4 |
| 23 | Quirk Brian Charles Sr. VP, Global Operations | 2018-05-08 13:52:59 | 17,641 0 | 17,641 | Form 4 |
| 24 | WEIGNER RONALD V.P., C.F.O & Treasurer | 2010-02-12 17:39:05 | 17,204 0 | 17,204 | Form 5 |
| 25 | KAHL HANS JOCHEN Director | 2011-05-03 12:00:52 | 16,000 0 | 16,000 | Form 4 |
| 26 | Batra Raj Director | 2025-05-13 16:35:52 | 15,445 0 | 15,445 | Form 4 |
| 27 | Taranto Eric Robert EVP & GM, VSD | 2026-03-09 12:01:15 | 15,445 0 | 15,445 | Form 4 |
| 28 | ANDERSON ROBERT R Director | 2017-05-18 12:58:35 | 3,832 9,296 | 13,128 | Form 4 |
| 29 | BERGES JAMES G Director | 2006-05-10 15:02:27 | 12,000 0 | 12,000 | Form 4 |
| 30 | VALENTE LOUIS P Director | 2012-02-07 12:42:16 | 12,000 0 | 12,000 | Form 4 |
| 31 | ROBBINS OWEN W Director | 2006-05-10 15:02:42 | 12,000 0 | 12,000 | Form 4 |
| 32 | Donahue Joseph B Director | 2025-05-13 16:41:35 | 11,351 0 | 11,351 | Form 4 |
| 33 | Loomis Paul VP & GM, Astex | 2014-02-03 16:24:04 | 10,944 0 | 10,944 | Form 4 |
| 34 | Warner Michelle M Director | 2024-05-08 17:33:32 | 10,852 0 | 10,852 | Form 4 |
| 35 | Moloney Jacqueline F Director | 2026-03-13 10:19:51 | 10,393 0 | 10,393 | Form 4 |
| 36 | Eyerman Paul VP & GM, ENI and Medical | 2014-02-03 16:25:09 | 10,121 0 | 10,121 | Form 4 |
| 37 | PHILLIPPY ROBERT J Director | 2018-02-16 18:08:18 | 1,989 7,355 | 9,344 | Form 4 |
| 38 | SMITH JOHN ALEXANDER Sr. VP, ASG | 2013-07-08 12:03:55 | 8,438 0 | 8,438 | Form 4 |
| 39 | CANNONE PETER III Director | 2026-02-23 14:48:46 | 8,362 0 | 8,362 | Form 4 |
| 40 | CHUTE RICHARD S Director | 2019-05-09 16:59:41 | 6,616 0 | 6,616 | Form 4 |
| 41 | Hess Rick D Director | 2019-05-09 17:03:07 | 5,468 0 | 5,468 | Form 4 |
| 42 | JABRE WISSAM G Director | 2025-05-13 16:44:52 | 4,488 0 | 4,488 | Form 4 |
| 43 | Williams John Edward EVP & GM, PSD | 2026-02-23 14:30:07 | 3,640 0 | 3,640 | Form 4 |
| 44 | STEWART WILLIAM D VP/GM, Vacuum Products | 2012-04-24 08:06:09 | 0 3,268 | 3,268 | Form 4 |
| 45 | HENRY JANICE K Director | 2020-05-12 16:31:13 | 1,989 0 | 1,989 | Form 4 |
| 46 | Beecher Gregory R Director | 2020-05-06 15:53:18 | 1,981 0 | 1,981 | Form 4 |
| 47 | HANLEY PETER Director | 2018-08-08 11:46:55 | 1,501 0 | 1,501 | Form 4 |
| 48 | BAGSHAW SETH H EVP, CFO & Treasurer | 2024-02-26 11:51:10 | 0.788 0 | 0.788 | Form 4 |
| 49 | Carlyle Group Inc. Carlyle Holdings II GP L.L.C. Carlyle Holdings II L.L.C. CG Subsidiary Holdings L.L.C. TC Group Cayman Investment Holdings L.P. TC Group Cayman Investment Holdings Sub L.P. TC Group VI Cayman L.L.C. TC Group VI Cayman L.P. 10% Owner | 2024-02-12 17:45:02 | 0 0 | 0 | Form 13G |
| 50 | McCarthy Michelle M VP & Chief Accounting Officer | 2026-02-23 14:36:47 | 0 0 | 0 | Form 4 |