MKS INC (MKSI) Stock
MKSI has an Alpha Score of 32 out of 100 (poor), computed on Oct 31, 2026 from 3 of 4 sub-scores. 1 member of Congress disclosed 4 trades in MKSI since 2025: 2 purchases and 2 sales, most recently Lisa McClain (sale, Oct 31, 2025). 9 of the hedge funds AlphaScala tracks reported MKSI in 13F filings for the quarter ended Jun 30, 2026; the largest reported position is Point72's at $888.20M. Company insiders reported 0 open-market buys and 2 sales on SEC Form 4 in the 90 days to Nov 6, 2026. Its trailing P/E ratio is 28.6 and its net margin 10.1% (key statistics as of Nov 7, 2026).
What is MKSI's Alpha Score?
How it works →Alpha Score of 31 reflects weak overall profile with poor momentum, poor value, moderate quality. Based on 3 of 4 signals – score is capped at 90 until remaining data ingests.
Computed from 3 of 4 sub-scores; a sub-score is left out when its inputs are missing, and the composite is capped accordingly.
Computed Oct 31, 2026
A rules-based research rating, not a recommendation to buy or sell.
Which members of Congress traded MKS INC (MKSI)?
Most recent: Lisa McClain (sale, Oct 31, 2025); records start Aug 4, 2025.
| Politician | Trade date | Type | Amount |
|---|---|---|---|
| Lisa McClain R-MI · House | 2025-10-31 | sale | $1k – $15k |
| Lisa McClain R-MI · House | 2025-10-30 | purchase | $1k – $15k |
| Lisa McClain R-MI · House | 2025-10-30 | sale | $1k – $15k |
| Lisa McClain R-MI · House | 2025-08-04 | purchase | $1k – $15k |
From STOCK Act periodic transaction reports. House filings as of Nov 5, 2026.
See all MKSI political trades →Which hedge funds own MKSI?
From 13F filings| Fund | Shares Held | Position Value | Change vs prior Q |
|---|---|---|---|
| Point72 Steve Cohen | 2.00M | $888.20M | +24% |
| Whale Rock Capital Alex Sacerdote | 1.27M | $565.51M | -3% |
| Citadel Ken Griffin | 698K | $310.32M | -26% |
| Millennium Management Israel Englander | 645K | $286.93M | -28% |
| Marshall Wace | 225K | $100.13M | +128% |
| Renaissance Technologies Jim Simons (founder) | 40K | $17.97M | -61% |
| Bridgewater Associates Ray Dalio | 27K | $12.10M | -29% |
| D.E. Shaw David Shaw | 4K | $1.92M | -96% |
| Maverick Capital Lee Ainslie | 2K | $911.8K | -72% |
13F holdings as of Jun 30, 2026
Explore all tracked funds →Are MKS INC insiders buying or selling?
SEC Form 4 filings| Date | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| Sep 1, 26 | Mora Elizabeth | Director | SELL | 300 | $75K |
| Aug 14, 26 | Lee John Tseng-Chung | President & CEO | SELL | 10.0K | $3.0M |
| Aug 3, 26 | Williams John Edward | EVP & GM, PSD | SELL | 457 | $132K |
SEC Form 4 filings as of Nov 6, 2026
See cluster-buy signals across all tickers →What are MKSI's key statistics?
Key statistics as of Nov 7, 2026
How does MKSI's valuation compare with the Technology sector?
| Metric | MKSI | Technology median | Companies in median |
|---|---|---|---|
| P/E ratio | 28.6 | 29.4 | 180 |
| Net margin | 10.12% | 11.10% | 209 |
| Return on equity | 15.83% | 14.71% | 212 |
| Dividend yield (payers) | 1.12% | 1.42% | 75 |
Medians over the Technology stocks whose key statistics were refreshed in the last 35 days (newest Nov 8, 2026). P/E excludes loss-making companies.
MKSI price chart
Powered by TradingViewWhat does MKS INC do?
MKS Instruments Inc. is a technology company that delivers foundational technology solutions for semiconductor manufacturing, electronics and packaging, and specialty industrial applications worldwide. It operates through three primary segments: Vacuum Solutions Division, offering pressure and flow measurement and control, gas and vapor delivery, gas composition analysis, reactive gas generation, power generation and delivery, and fiber optic sensing; Photonics Solutions Division, providing lasers, beam measurement, precision motion control, vibration isolation, photonics instruments, opto-mechanical components, optical elements, and systems for flexible PCB laser processing and high-density interconnect manufacturing; and Material Solutions Division, developing advanced surface modification, electroless and electrolytic plating, and surface finishing technologies for chemistry, equipment, and high-technology markets. The company supplies instruments, subsystems, process control solutions, and specialty chemicals that enhance process performance in sectors like life and health sciences, research, defense, and automotive. Products are distributed through direct sales, independent distributors, sales representatives, and online platforms including product catalogs. Incorporated in 1961 and headquartered in Andover, Massachusetts, MKS Instruments Inc. supports innovations in artificial intelligence, augmented reality, and autonomous vehicles with its broad portfolio of vacuum technologies, photonics, optics, and precision systems.