MKS Inc
Held by 14 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 55306N104 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns MKSI?
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Who owns MKSI? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value ↓ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Steve Cohen | Point72 Asset Management | 2.00M | $888.20M | 1.4% | Added | +386.5K | +24.0% | +$171.92M |
| 2 | Norges Bank | Norges Bank Investment Management | 954.67K | $424.64M | 0.0% | — | — | — | — |
| 3 | Ken Griffin | Citadel Advisors | 697.67K | $310.32M | 0.2% | Reduced | -249.4K | -26.3% | -$110.92M |
| 4 | Israel Englander | Millennium Management | 645.07K | $286.93M | 0.2% | Reduced | -249.3K | -27.9% | -$110.89M |
| 5 | Chuck Royce | Royce & Associates | 261.57K | $116.35M | 0.9% | Reduced | -142.1K | -35.2% | -$63.21M |
| 6 | Two Sigma | Two Sigma Investments | 143.37K | $63.77M | 0.0% | Reduced | -135.3K | -48.6% | -$60.19M |
| 7 | Light Street Capital | Light Street Capital Management | 103.80K | $46.17M | 5.4% | Reduced | -18.5K | -15.1% | -$8.21M |
| 8 | Larry Robbins | Glenview Capital | 98.53K | $43.83M | 0.9% | New | +98.5K | — | +$43.83M |
| 9 | Tom Marsico | Marsico Capital Management | 88.15K | $39.21M | 1.0% | New | +88.2K | — | +$39.21M |
| 10 | Boston Partners | Boston Partners Global Investors | 47.42K | $21.09M | 0.0% | Added | +16.0K | +50.8% | +$7.10M |
| 11 | Jim Simons | Renaissance Technologies | 40.40K | $17.97M | 0.0% | Reduced | -63.2K | -61.0% | -$28.11M |
| 12 | Ray Dalio | Bridgewater Associates | 27.20K | $12.10M | 0.0% | Reduced | -10.9K | -28.7% | -$4.86M |
| 13 | David Shaw | D.E. Shaw & Co. | 4.33K | $1.92M | 0.0% | Reduced | -115.8K | -96.4% | -$51.53M |
| 14 | Mario Gabelli | GAMCO Investors | 715 | $318.03K | 0.0% | Reduced | -3.2K | -81.5% | -$1.41M |
Column filters
No tracked manager sold out of this stock this quarter.
Politician trades
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| Politician | Date | Ticker | Asset | Type | Reported range ⓘThe dollar range the politician reported. Exact amounts are not disclosed. | Est. size ⓘOur estimate only: the midpoint of the reported range. | Owner | Account ⓘSubholding Of: the account the trade was in, as named on the report (e.g. an IRA or a brokerage account). The same stock bought on the same day in different accounts is a separate trade in each account. | Filed ↓ | Filing delay ⓘDays between the trade and the report. Over 45 days is late under the STOCK Act. | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lisa McClain Politician | Oct 30, 2025 | MKSI | MKS Inc. - Common Stock (MKSI) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Charles Schwab Brokerage Account 924 | Nov 21, 2025 | 22 days | PTR ↗ |
| Lisa McClain Politician | Oct 30, 2025 | MKSI | MKS Inc. - Common Stock (MKSI) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Charles Schwab 401K > Schwab 893 | Nov 21, 2025 | 22 days | PTR ↗ |
| Lisa McClain Politician | Oct 31, 2025 | MKSI | MKS Inc. - Common Stock (MKSI) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Charles Schwab 401K > Schwab 893 | Nov 21, 2025 | 21 days | PTR ↗ |
| Lisa McClain Politician | Aug 4, 2025 | MKSI | MKS Inc. - Common Stock (MKSI) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Sep 12, 2025 | 39 days | PTR ↗ |