MKSINasdaqIndustrial Instruments For Measurement, Display, and ControlFiscal year ends December 31
MKS INC
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 6, 2026
$215.41+0.58 (+0.27%)
Close on Oct 19, 2026
- Market cap
- $15.66B
- P/E (TTM)
- 34.4
- Dividend yield
- 0.41%
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
100.0%
71M of 68M shares
Institutional holders
773
214 new, 53 sold out
Net institutional buying
2M
In Q2 2026
Insider trades, 12 months
0 buys · 45 sales
Net sold $43.41M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| BlackRock, Inc. | 5,887,663 | 8.80% | 13G (passive) amendment | Sep 30, 2025 |
| Invesco Ltd. | 4,394,205 | 6.50% | 13G (passive) | Dec 31, 2025 |
| Vanguard Portfolio Management | 3,700,062 | 5.49% | 13G (passive) | Mar 31, 2026 |
| Vanguard Capital Management | 3,528,836 | 5.24% | 13G (passive) | Mar 31, 2026 |
| JPMorgan Chase & Co | 3,417,585 | 5.00% | 13G (passive) | Jun 30, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of MKSI | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 6,930,030 | 10.25% | $3.08B | +288,300 | 0.05% |
| Invesco Ltd. | 4,661,664 | 6.89% | $2.07B | +940,205 | 0.16% |
| Vanguard Portfolio Management LLC | 3,707,327 | 5.48% | $1.65B | +21,834 | 0.07% |
| JPMorgan Chase & Co | 3,373,844 | 4.99% | $1.40B | +1,277,502 | 0.08% |
| Vanguard Capital Management LLC | 3,049,560 | 4.51% | $1.36B | +35,359 | 0.03% |
| State Street Corp | 2,134,663 | 3.16% | $949.44M | +76,931 | 0.03% |
| Point72 Asset Management, L.P. | 1,996,843 | 2.95% | $888.20M | +386,512 | 0.98% |
| Capital International Investors | 1,915,187 | 2.83% | $851.88M | −53,583 | 0.18% |
| Price T Rowe Associates Inc /Md/ | 1,889,901 | 2.79% | $840.63K | +189,753 | 0.08% |
| Aspex Management (HK) Ltd | 1,820,441 | 2.69% | $809.73K | +281,652 | 9.11% |
| Geode Capital Management, LLC | 1,539,072 | 2.28% | $686.57M | −247 | 0.04% |
| FMR LLC | 1,499,498 | 2.22% | $666.98M | −434,345 | 0.03% |
| Wellington Management Group Llp | 1,416,034 | 2.09% | $629.85M | −417,103 | 0.11% |
| Capital World Investors | 1,366,290 | 2.02% | $607.73M | +89,090 | 0.07% |
| Whale Rock Capital Management LLC | 1,271,373 | 1.88% | $565.51M | −35,351 | 4.54% |
| Neuberger Berman Group LLC | 1,165,068 | 1.72% | $518.22M | −268,461 | 0.34% |
| Alkeon Capital Management LLC | 1,072,040 | 1.59% | $476.84M | New | 0.64% |
| Norges Bank | 954,667 | 1.41% | $424.64M | New | 0.04% |
| Westfield Capital Management Co LP | 928,617 | 1.37% | $413.05M | −118,146 | 1.35% |
| Sachem Head Capital Management LP | 812,700 | 1.20% | $361.49M | New | 7.50% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 773 | 71M | 100.0% | 214 / 244 | 251 / 53 | 11M | 9M |
| Q1 2026 | 620 | 69M | 100.0% | 164 / 203 | 191 / 54 | 22M | 16M |
| Q4 2025 | 515 | 71M | 100.0% | 131 / 177 | 146 / 41 | 9M | 11M |
| Q3 2025 | 434 | 73M | 100.0% | 80 / 148 | 139 / 38 | 8M | 11M |
| Q2 2025 | 395 | 75M | 100.0% | 74 / 152 | 134 / 71 | 10M | 6M |
| Q1 2025 | 397 | 72M | 100.0% | 60 / 171 | 118 / 79 | 7M | 5M |
| Q4 2024 | 420 | 70M | 100.0% | 67 / 171 | 129 / 53 | 7M | 5M |
| Q3 2024 | 410 | 69M | 100.0% | 70 / 180 | 111 / 52 | 13M | 8M |
| Q2 2024 | 397 | 71M | 100.0% | 85 / 141 | 121 / 28 | 5M | 6M |
| Q1 2024 | 343 | 72M | 100.0% | 54 / 125 | 108 / 34 | 7M | 4M |
| Q4 2023 | 325 | 69M | 100.0% | 56 / 110 | 114 / 50 | 11M | 10M |
| Q3 2023 | 324 | 67M | 99.1% | 48 / 123 | 94 / 42 | 5M | 5M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of MKSI | Value | % of fund | As of |
|---|---|---|---|---|---|
| SMALLCAP World Fund Inc | 2,453,957 | 3.63% | $1.09B | 1.15% | Jun 30, 2026 |
| iShares Core S&P Mid-Cap ETF | 2,311,488 | 3.42% | $1.03B | 0.83% | Jun 30, 2026 |
| Vanguard Total Stock Market Index Fund | 2,143,925 | 3.17% | $953.62M | 0.04% | Jun 30, 2026 |
| Vanguard Small-Cap Index Fund | 1,548,875 | 2.29% | $688.94M | 0.37% | Jun 30, 2026 |
| Invesco Small Cap Value Fund | 1,146,556 | 1.70% | $341.04M | 3.07% | Jul 31, 2026 |
| Invesco Value Opportunities Fund | 882,467 | 1.31% | $262.49M | 2.89% | Jul 31, 2026 |
| JPMorgan Large Cap Growth Fund | 800,077 | 1.18% | $355.87M | 0.29% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 774,625 | 1.15% | $344.55M | 0.35% | Jun 30, 2026 |
| Vanguard Information Technology Index Fund | 762,968 | 1.13% | $247.40M | 0.14% | May 31, 2026 |
| Growth Fund of America | 607,811 | 0.90% | $197.09M | 0.05% | May 31, 2026 |
| JPMorgan Mid Cap Value Fund | 542,695 | 0.80% | $241.39M | 2.16% | Jun 30, 2026 |
| Invesco S&P MidCap Momentum ETF | 524,639 | 0.78% | $156.05M | 2.17% | Jul 31, 2026 |
| Vanguard Small-Cap Value Index Fund | 490,632 | 0.73% | $218.23M | 0.32% | Jun 30, 2026 |
| T. Rowe Price Mid-Cap Value Fund, Inc. | 486,420 | 0.72% | $216.36M | 1.32% | Jun 30, 2026 |
| Vanguard Small-Cap Growth Index Fund | 446,527 | 0.66% | $198.62M | 0.42% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| John Tseng-Chung Lee | President & CEO, Director | 134,776 | 0.20% | Aug 17, 2026 |
| Renee Martel Donlan | EVP, GC & CCO | 9,472 | 0.01% | Aug 18, 2026 |
| John Edward Williams | EVP & GM, PSD | 4,098 | 0.01% | Aug 4, 2026 |
| James Alan Schreiner | EVP & COO | 19,201 | 0.03% | Jun 16, 2026 |
| Michelle M. McCarthy | SVP & Chief Accounting Officer | 2 | 0.00% | Jun 8, 2026 |
| David Philip Henry | EVP, Global Str Mktg & GM, MSD | 10,422 | 0.02% | Jun 2, 2026 |
| Ramakumar Mayampurath | EVP & CFO | 1 | 0.00% | May 26, 2026 |
| Eric Robert Taranto | EVP & GM, VSD | 12,596 | 0.02% | May 12, 2026 |
| Kathleen Flaherty Burke | EVP, GC & Secretary | 49,439 | 0.07% | May 12, 2026 |
| Elizabeth Mora | Director | 18,845 | 0.03% | Sep 2, 2026 |
| Gerald G. Colella | Director | 29,016 | 0.04% | May 28, 2026 |
| Joseph B. Donahue | Director | 10,033 | 0.01% | May 28, 2026 |
| Peter Cannone Iii | Director | 7,794 | 0.01% | May 19, 2026 |
| Jacqueline F. Moloney | Director | 8,775 | 0.01% | May 15, 2026 |
| Raj Batra | Director | 16,227 | 0.02% | May 12, 2026 |
| Wissam G. Jabre | Director | 5,270 | 0.01% | May 12, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Elizabeth Mora Director | Sep 1, 2026 | Sale(10b5-1 plan) | −300 | $250.96 | $75.29K | 18,845 |
| John Tseng-Chung Lee President & CEO, Director | Aug 14, 2026 | Sale(10b5-1 plan) | −10,000 | $302.01 | $3.02M | 134,776 |
| John Edward Williams EVP & GM, PSD | Aug 3, 2026 | Sale(10b5-1 plan) | −457 | $288.31 | $131.76K | 4,098 |
| James Alan Schreiner EVP & COO | Jun 12, 2026 | Sale | −217 | $347.00 | $75.30K | 19,201 |
| James Alan Schreiner EVP & COO | Jun 12, 2026 | Sale | −2,471 | $345.52 | $853.78K | 20,230 |
| James Alan Schreiner EVP & COO | Jun 12, 2026 | Sale | −812 | $346.41 | $281.28K | 19,418 |
| James Alan Schreiner EVP & COO | Jun 10, 2026 | Sale(10b5-1 plan) | −781 | $317.42 | $247.91K | 22,701 |
| Michelle M. McCarthy SVP & Chief Accounting Officer | Jun 5, 2026 | Sale(10b5-1 plan) | −2,434 | $315.23 | $767.27K | 2 |
| Elizabeth Mora Director | Jun 1, 2026 | Sale(10b5-1 plan) | −300 | $318.02 | $95.41K | 19,145 |
| David Philip Henry EVP, Global Str Mktg & GM, MSD | Jun 1, 2026 | Sale | −6,000 | $314.43 | $1.89M | 10,422 |
| Gerald G. Colella Director | May 27, 2026 | Sale(10b5-1 plan) | −2,800 | $338.58 | $948.02K | 20,017 |
| Gerald G. Colella Director | May 27, 2026 | Sale(10b5-1 plan) | −213 | $337.05 | $71.79K | 22,817 |
| Gerald G. Colella Director | May 27, 2026 | Sale(10b5-1 plan) | −1,626 | $336.54 | $547.21K | 23,030 |
| Gerald G. Colella Director | May 27, 2026 | Sale(10b5-1 plan) | −1,811 | $335.46 | $607.52K | 24,656 |
| Gerald G. Colella Director | May 27, 2026 | Sale(10b5-1 plan) | −4,876 | $332.04 | $1.62M | 26,467 |
| Gerald G. Colella Director | May 27, 2026 | Sale(10b5-1 plan) | −8,210 | $331.45 | $2.72M | 31,343 |
| Gerald G. Colella Director | May 27, 2026 | Sale(10b5-1 plan) | −464 | $330.38 | $153.30K | 39,553 |
| Joseph B. Donahue Director | May 27, 2026 | Sale | −2,100 | $327.95 | $688.70K | 10,033 |
| David Philip Henry EVP, Global Str Mktg & GM, MSD | May 26, 2026 | Sale(10b5-1 plan) | −2,500 | $330.50 | $826.25K | 16,341 |
| Ramakumar Mayampurath EVP & CFO | May 22, 2026 | Sale(10b5-1 plan) | −8,810 | $315.48 | $2.78M | 1 |
| John Tseng-Chung Lee President & CEO, Director | May 22, 2026 | Sale(10b5-1 plan) | −10,000 | $315.48 | $3.15M | 144,696 |
| Peter Cannone Iii Director | May 18, 2026 | Sale | −1,350 | $303.40 | $409.59K | 7,794 |
| Jacqueline F. Moloney Director | May 14, 2026 | Sale | −1,000 | $312.20 | $312.20K | 8,775 |
| Jacqueline F. Moloney Director | May 13, 2026 | Sale | −1,400 | $318.99 | $446.59K | 9,775 |
| Joseph B. Donahue Director | May 11, 2026 | Award | +781.96 | – | – | 12,133 |
| Gerald G. Colella Director | May 11, 2026 | Award | +781.96 | – | – | 8,999 |
| Eric Robert Taranto EVP & GM, VSD | May 11, 2026 | Sale | −2,848.52 | $319.93 | $911.33K | 12,596 |
| Kathleen Flaherty Burke EVP, GC & Secretary | May 11, 2026 | Sale | −4,355 | $319.94 | $1.39M | 49,439 |
| Raj Batra Director | May 11, 2026 | Award | +781.96 | – | – | 16,227 |
| Wissam G. Jabre Director | May 11, 2026 | Award | +781.96 | – | – | 5,270 |
| Elizabeth Mora Director | May 11, 2026 | Award | +781.96 | – | – | 19,445 |
| Peter Cannone Iii Director | May 11, 2026 | Award | +781.96 | – | – | 9,144 |
| Jacqueline F. Moloney Director | May 11, 2026 | Award | +781.96 | – | – | 11,175 |
| John Edward Williams EVP & GM, PSD | Apr 17, 2026 | Tax withholding | −825.97 | $269.89 | $222.92K | 4,555 |
| John Edward Williams EVP & GM, PSD | Apr 17, 2026 | Option exercise | +1,740.71 | – | – | 5,381 |
| Michelle M. McCarthy SVP & Chief Accounting Officer | Apr 15, 2026 | Option exercise | +968 | – | – | 968 |
| Michelle M. McCarthy SVP & Chief Accounting Officer | Apr 15, 2026 | Option exercise | +1,107 | – | – | 2,075 |
| Michelle M. McCarthy SVP & Chief Accounting Officer | Apr 15, 2026 | Option exercise | +1,736 | – | – | 3,811 |
| Michelle M. McCarthy SVP & Chief Accounting Officer | Apr 15, 2026 | Tax withholding | −1,375.45 | $274.15 | $377.08K | 2,436 |
| Jacqueline F. Moloney Director | Mar 12, 2026 | Sale | −340.11 | $213.77 | $72.71K | 10,393 |
| Eric Robert Taranto EVP & GM, VSD | Mar 6, 2026 | Sale | −4,567.88 | $220.52 | $1.01M | 15,445 |
| Elizabeth Mora Director | Mar 2, 2026 | Sale(10b5-1 plan) | −300 | $239.44 | $71.83K | 18,663 |
| James Alan Schreiner EVP & COO | Feb 24, 2026 | Sale | −4,100 | $255.00 | $1.05M | 23,402 |
| Gerald G. Colella Director | Feb 24, 2026 | Sale | −10,000 | $253.97 | $2.54M | 40,017 |
| Gerald G. Colella Director | Feb 20, 2026 | Sale | −10,000 | $252.90 | $2.53M | 50,017 |
| David Philip Henry EVP, Global Str Mktg & GM, MSD | Feb 20, 2026 | Sale | −2,000 | $261.56 | $523.12K | 18,841 |
| John Edward Williams EVP & GM, PSD | Feb 20, 2026 | Sale | −2,042.63 | $256.41 | $523.75K | 3,640 |
| Jacqueline F. Moloney Director | Feb 20, 2026 | Sale | −829 | $247.55 | $205.22K | 10,733 |
| John Tseng-Chung Lee President & CEO, Director | Feb 20, 2026 | Sale | −13,310 | $256.05 | $3.41M | 171,386 |
| John Tseng-Chung Lee President & CEO, Director | Feb 20, 2026 | Sale | −12,812 | $256.93 | $3.29M | 158,574 |
| John Tseng-Chung Lee President & CEO, Director | Feb 20, 2026 | Sale | −1,890 | $259.70 | $490.83K | 154,696 |
| John Tseng-Chung Lee President & CEO, Director | Feb 20, 2026 | Sale | −1,988 | $257.81 | $512.53K | 156,586 |
| Michelle M. McCarthy VP & Chief Accounting Officer | Feb 20, 2026 | Sale | −650 | $249.57 | $162.22K | 816 |
| Michelle M. McCarthy VP & Chief Accounting Officer | Feb 20, 2026 | Sale | −816 | $250.35 | $204.29K | 0 |
| Peter Cannone Iii Director | Feb 20, 2026 | Sale | −1,250 | $258.06 | $322.58K | 8,362 |
| Kathleen Flaherty Burke EVP, GC & Secretary | Feb 20, 2026 | Sale | −4,254 | $250.00 | $1.06M | 53,794 |
| Eric Robert Taranto EVP & GM, VSD | Feb 20, 2026 | Sale | −1,452.73 | $247.55 | $359.62K | 20,013 |
| James Alan Schreiner EVP & COO | Feb 17, 2026 | Tax withholding | −4,343.76 | $260.74 | $1.13M | 27,502 |
| James Alan Schreiner EVP & COO | Feb 17, 2026 | Option exercise | +1,330.43 | – | – | 26,517 |
| James Alan Schreiner EVP & COO | Feb 17, 2026 | Option exercise | +1,740.8 | – | – | 29,902 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Elizabeth Mora Director | Sep 1, 2026 | 300 | $75.29K | Sep 1, 2026 | Restricted Stock Vesting |
| John Tseng-Chung Lee Officer, Director | Aug 14, 2026 | 10,000 | $3.02M | Aug 14, 2026 | Restricted Stock Vesting |
| John Edward Williams Officer | Aug 3, 2026 | 457 | $131.76K | Aug 3, 2026 | Restricted Stock Vesting |
| James Alan Schreiner Officer | Jun 12, 2026 | 3,500 | $1.21M | Jun 12, 2026 | ESPP Purchase |
| James Alan Schreiner Officer | Jun 10, 2026 | 781 | $247.91K | Jun 10, 2026 | Restricted Stock Vesting |
| Michelle M. McCarthy Officer | Jun 5, 2026 | 2,434 | $767.27K | Jun 5, 2026 | Restricted Stock Vesting |
| Elizabeth Mora Director | Jun 1, 2026 | 300 | $95.41K | Jun 1, 2026 | Common |
| David Philip Henry Officer | Jun 1, 2026 | 6,000 | $1.89M | Jun 1, 2026 | Restricted Stock Vesting |
| G. Colella 2019 Trust u/a dtd 5/4/2019 Gerald Officer | May 27, 2026 | 20,000 | $6.67M | May 27, 2026 | Stock grant |
| Joseph B. Donahue Director | May 27, 2026 | 2,100 | $688.70K | May 27, 2026 | Restricted Stock Vesting |
| David Philip Henry Officer | May 26, 2026 | 2,500 | $826.25K | May 26, 2026 | Restricted Stock Vesting |
| Ramakumar Mayampurath Officer | May 22, 2026 | 8,810 | $2.78M | May 22, 2026 | Restricted Stock Vesting |
| John Tseng-Chung Lee Officer, Director | May 22, 2026 | 10,000 | $3.15M | May 22, 2026 | Restricted Stock Vesting |
| Peter Cannone Iii Director | May 18, 2026 | 1,350 | $409.59K | May 18, 2026 | Restricted Stock Vesting |
| Jacqueline F. Moloney Director | May 14, 2026 | 1,000 | $312.20K | May 14, 2026 | Restricted Stock Vesting |