MKS Inc
MKSI- Exchange
- Nasdaq
- Industry
- Industrial Instruments For Measurement, Display, and Control
- SEC CIK
- 0001049502
In the last 90 days, MKS Inc insiders filed 0 open-market purchases and 3 sales; 777 institutions reported holding it in 13F filings for Q2 2026, worth $31.3B in total; Maverick Capital is the only superinvestor holding it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by MKS Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 3 filings
- 3 insiders, $3.23M in total
- Insiders trading
- 3
- Net value
- −$3.23M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for MKS Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Mora Elizabeth | Director | 18,845 | Sep 2, 2026 | 5 |
| Donlan Renee Martel | EVP, GC & CCO | – | Aug 18, 2026 | 1 |
| Lee John Tseng-Chung | President & CEO | 134,776 | Aug 17, 2026 | 6 |
| Williams John Edward | EVP & GM, PSD | 4,098 | Aug 4, 2026 | 5 |
| Schreiner James Alan | EVP & COO | 19,201 | Jun 16, 2026 | 6 |
| McCarthy Michelle M | SVP & Chief Accounting Officer | 2 | Jun 8, 2026 | 3 |
| Henry David Philip | EVP, Global Str Mktg & GM, MSD | 10,422 | Jun 2, 2026 | 5 |
| Colella Gerard G | Director | 20,017Indirect | May 28, 2026 | 3 |
| Donahue Joseph B | Director | 10,033 | May 28, 2026 | 2 |
| Mayampurath Ramakumar | EVP & CFO | 1 | May 26, 2026 | 4 |
| Cannone Peter III | Director | 7,794 | May 19, 2026 | 3 |
| Moloney Jacqueline F | Director | 8,775 | May 15, 2026 | 6 |
| Batra Raj | Director | 16,227 | May 12, 2026 | 1 |
| Burke Kathleen Flaherty | EVP, GC & Secretary | 49,439 | May 12, 2026 | 5 |
| Taranto Eric Robert | EVP & GM, VSD | 12,596 | May 12, 2026 | 5 |
| Jabre Wissam G | Director | 5,270 | May 12, 2026 | 1 |
| Warner Michelle M | Director | 10,852 | May 8, 2024 | 0 |
| Bagshaw Seth H | EVP, CFO & Treasurer | 1 | Feb 26, 2024 | 0 |
| Gitin Mark Milton | EVP & GM, PSD | 16,134 | Feb 16, 2024 | 0 |
| Carlyle Asia Partners IV, L.P. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| Carlyle Partners VI Cayman Holdings, L.P. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| Gamma Holding Co Ltd | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| CEP IV Participations, S.a r.l. SICAR | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| CEP IV Managing GP, L.P. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| CEP IV Managing GP Holdings, Ltd. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| CAP IV General Partner, L.P. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| Cap IV, L.L.C. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| TC Group Cayman Investment Holdings, L.P. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| Carlyle Group Inc. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| Carlyle Holdings II GP L.L.C. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| Carlyle Holdings II L.L.C. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| TC Group Cayman Investment Holdings Sub L.P. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| CG Subsidiary Holdings L.L.C. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| TC Group VI Cayman, L.L.C. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| TC Group VI Cayman, L.P. | 10% Owner | 6,482,732Indirect | May 10, 2023 | 0 |
| Wild Geoffrey | Director | 1,813 | Aug 18, 2022 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Oct 23, 2025 (view filing) | Oct 22 | 1 day | Schreiner James AlanEVP & COO | SSale | −711 | $138.68 | −$98.6K | −3.1%22.5K after | 10b5-1 |
| Dec 3, 2025 (view filing) | Dec 2 | 1 day | Mora ElizabethDirector | SSale | −300 | $158.81 | −$47.6K | −1.6%19.0K after | 10b5-1 |
| Feb 23, 2026 (view filing) | Feb 20 | 3 days | Lee John Tseng-ChungPresident & CEO | SSale | −30.0K | $256.77 | −$7.70M | −16.2%154.7K after | 4 lots |
| Feb 23, 2026 (view filing) | Feb 20 | 3 days | Burke Kathleen FlahertyEVP, GC & Secretary | SSale | −4.25K | $250.00 | −$1.06M | −7.3%53.8K after | |
| Feb 23, 2026 (view filing) | Feb 20 | 3 days | Williams John EdwardEVP & GM, PSD | SSale | −2.04K | $256.41 | −$523.8K | −35.9%3.64K after | |
| Feb 23, 2026 (view filing) | Feb 20 | 3 days | Moloney Jacqueline FDirector | SSale | −829 | $247.55 | −$205.2K | −7.2%10.7K after | |
| Feb 23, 2026 (view filing) | Feb 20 | 3 days | McCarthy Michelle MVP & Chief Accounting Officer | SSale | −1.47K | $250.00 | −$366.5K | −100.0%0 after | 2 lots |
| Feb 23, 2026 (view filing) | Feb 20 | 3 days | Henry David PhilipEVP, Global Str Mktg & GM, MSD | SSale | −2.00K | $261.56 | −$523.1K | −9.6%18.8K after | |
| Feb 23, 2026 (view filing) | Feb 20 | 3 days | Taranto Eric RobertEVP & GM, VSD | SSale | −1.45K | $247.55 | −$359.6K | −6.8%20.0K after | |
| Feb 23, 2026 (view filing) | Feb 20 | 3 days | Cannone Peter IIIDirector | SSale | −1.25K | $258.06 | −$322.6K | −13.0%8.36K after | |
| Feb 24, 2026 (view filing) | Feb 20-24 | 4 days | Colella Gerard GDirector | SSale | −20.0K | $253.44 | −$5.07M | −33.3%40.0K after | 2 lots |
| Feb 25, 2026 (view filing) | Feb 24 | 1 day | Schreiner James AlanEVP & COO | SSale | −4.10K | $255.00 | −$1.05M | −14.9%23.4K after | |
| Mar 3, 2026 (view filing) | Mar 2 | 1 day | Mora ElizabethDirector | SSale | −300 | $239.44 | −$71.8K | −1.6%18.7K after | 10b5-1 |
| Mar 9, 2026 (view filing) | Mar 6 | 3 days | Taranto Eric RobertEVP & GM, VSD | SSale | −4.57K | $220.52 | −$1.01M | −22.8%15.4K after | |
| Mar 13, 2026 (view filing) | Mar 12 | 1 day | Moloney Jacqueline FDirector | SSale | −340.11 | $213.77 | −$72.7K | −3.2%10.4K after | |
| May 12, 2026 (view filing) | May 11 | 1 day | Burke Kathleen FlahertyEVP, GC & Secretary | SSale | −4.36K | $319.94 | −$1.39M | −8.1%49.4K after | |
| May 12, 2026 (view filing) | May 11 | 1 day | Taranto Eric RobertEVP & GM, VSD | SSale | −2.85K | $319.93 | −$911.3K | −18.4%12.6K after | |
| May 14, 2026 (view filing) | May 13 | 1 day | Moloney Jacqueline FDirector | SSale | −1.40K | $318.99 | −$446.6K | −12.5%9.78K after | |
| May 15, 2026 (view filing) | May 14 | 1 day | Moloney Jacqueline FDirector | SSale | −1.00K | $312.20 | −$312.2K | −10.2%8.78K after | |
| May 19, 2026 (view filing) | May 18 | 1 day | Cannone Peter IIIDirector | SSale | −1.35K | $303.40 | −$409.6K | −14.8%7.79K after | |
| May 26, 2026 (view filing) | May 22 | 4 days | Lee John Tseng-ChungPresident & CEO | SSale | −10.0K | $315.48 | −$3.15M | −6.5%144.7K after | 10b5-1 |
| May 26, 2026 (view filing) | May 22 | 4 days | Mayampurath RamakumarEVP & CFO | SSale | −8.81K | $315.48 | −$2.78M | −100.0%1.14 after | 10b5-1 |
| May 27, 2026 (view filing) | May 26 | 1 day | Henry David PhilipEVP, Global Str Mktg & GM, MSD | SSale | −2.50K | $330.50 | −$826.3K | −13.3%16.3K after | 10b5-1 |
| May 28, 2026 (view filing) | May 27 | 1 day | Colella Gerard GDirector | SSale | −20.0K | $333.40 | −$6.67M | −50.0%20.0K after | 7 lots10b5-1 |
| May 28, 2026 (view filing) | May 27 | 1 day | Donahue Joseph BDirector | SSale | −2.10K | $327.95 | −$688.7K | −17.3%10.0K after | |
| Jun 2, 2026 (view filing) | Jun 1 | 1 day | Mora ElizabethDirector | SSale | −300 | $318.02 | −$95.4K | −1.5%19.1K after | 10b5-1 |
| Jun 2, 2026 (view filing) | Jun 1 | 1 day | Henry David PhilipEVP, Global Str Mktg & GM, MSD | SSale | −6.00K | $314.43 | −$1.89M | −36.5%10.4K after | |
| Jun 8, 2026 (view filing) | Jun 5 | 3 days | McCarthy Michelle MSVP & Chief Accounting Officer | SSale | −2.43K | $315.23 | −$767.3K | −99.9%1.55 after | 10b5-1 |
| Jun 11, 2026 (view filing) | Jun 10 | 1 day | Schreiner James AlanEVP & COO | SSale | −781 | $317.42 | −$247.9K | −3.3%22.7K after | 10b5-1 |
| Jun 16, 2026 (view filing) | Jun 12 | 4 days | Schreiner James AlanEVP & COO | SSale | −3.50K | $345.82 | −$1.21M | −15.4%19.2K after | 3 lots |
| Aug 4, 2026 (view filing)12:21 PM ET | Aug 3 | 1 day | Williams John EdwardEVP & GM, PSD | SSale | −457 | $288.31 | −$131.8K | −10.0%4.10K after | 10b5-1 |
| Aug 17, 2026 (view filing)10:11 AM ET | Aug 14 | 3 days | Lee John Tseng-ChungPresident & CEO | SSale | −10.0K | $302.01 | −$3.02M | −6.9%134.8K after | 10b5-1 |
| Sep 2, 2026 (view filing)12:34 PM ET | Sep 1 | 1 day | Mora ElizabethDirector | SSale | −300 | $250.96 | −$75.3K | −1.6%18.8K after | 10b5-1 |