Insider holders · CIK 0001049502
MKS INC · MKSI
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| John R BertucciDirector | 185,295 | 181,755 | 367,050 | Oct 11, 2018 · 2:11 pm EDT | Form 4 |
| John Tseng-Chung LeePresident & CEO | 134,776 | — | 134,776 | Aug 17, 2026 · 10:11 am EDT | Form 4 |
| Gerard G ColellaCEO, Director | 30,660 | 17,888 | 48,548 | Feb 19, 2019 · 5:54 pm EST | Form 4 |
| Seth H BagshawSr. VP, CFO & Treasurer | 36,682 | — | 36,682 | Feb 19, 2019 · 5:58 pm EST | Form 4 |
| Cristina AmonDirector | 29,283 | — | 29,283 | Dec 17, 2015 · 1:12 pm EST | Form 4 |
| Gregory R BeecherDirector | 22,143 | — | 22,143 | May 10, 2018 · 5:08 pm EDT | Form 4 |
| James Alan SchreinerEVP & COO | 19,201 | — | 19,201 | Jun 16, 2026 · 5:35 pm EDT | Form 4 |
| Elizabeth MoraDirector | 18,845 | — | 18,845 | Sep 2, 2026 · 12:34 pm EDT | Form 4 |
| Brian Charles QuirkSr. VP, Global Operations | 17,641 | — | 17,641 | May 8, 2018 · 1:52 pm EDT | Form 4 |
| Dennis L WerthSr. VP, Business Units | 1,244 | 15,944 | 17,188 | Apr 3, 2018 · 1:04 pm EDT | Form 4 |
| Robert R AndersonDirector | 3,832 | 9,296 | 13,128 | May 18, 2017 · 12:58 pm EDT | Form 4 |
| Renee Martel DonlanEVP, GC & CCO | 9,472 | — | 9,472 | Jun 4, 2026 · 2:24 pm EDT | Form 3 |
| Robert J PhillippyDirector | 1,989 | 7,355 | 9,344 | Feb 16, 2018 · 6:08 pm EST | Form 4 |
| Richard S ChuteDirector | 8,115 | — | 8,115 | May 10, 2018 · 5:11 pm EDT | Form 4 |
| John R AbramsSr. VP, Global Sales | 6,864 | — | 6,864 | Feb 19, 2019 · 6:14 pm EST | Form 4 |
| Jacqueline F MoloneyDirector | 6,570 | — | 6,570 | Jun 12, 2018 · 12:21 pm EDT | Form 4 |
| John Edward WilliamsEVP & GM, PSD | 4,098 | — | 4,098 | Aug 4, 2026 · 12:21 pm EDT | Form 4 |
| Rick D HessDirector | 3,488 | — | 3,488 | May 10, 2018 · 5:18 pm EDT | Form 4 |
| Raj BatraDirector | 2,114 | — | 2,114 | Oct 2, 2018 · 4:52 pm EDT | Form 4 |
| Peter HanleyDirector | 1,501 | — | 1,501 | Aug 8, 2018 · 11:46 am EDT | Form 4 |
| Michelle M McCarthySVP & Chief Accounting Officer | 2 | — | 2 | Jun 8, 2026 · 10:53 am EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.