# MKS INSTRUMENTS INC

Summary updated: 2026-10-02T11:51:54.380529Z
Canonical: https://finbar.com/research/companies/mks-instruments-inc

## Overview

MKS Inc. (formerly MKS Instruments, Inc.) is an advanced-technology solutions provider serving semiconductor manufacturing, electronics and packaging, and specialty industrial markets. Its products include vacuum and pressure measurement and control, gas and vapor delivery, power and reactive-gas solutions, photonics components, laser systems, specialty chemicals, and plating equipment. These technologies support semiconductor production as well as printed circuit board, package-substrate and wafer-level packaging applications. [1](https://app.finbar.com/go?id=P88870372)[2](https://app.finbar.com/go?id=P74920876)[3](https://app.finbar.com/go?id=P27131527)[4](https://app.finbar.com/go?id=P95752846)

For fiscal 2025, MKS reported revenue of $3.931 billion. [5](https://app.finbar.com/go?id=T9486425) International sales accounted for 81% of 2025 revenue, and the company says its workforce spans more than 35 countries. [6](https://app.finbar.com/go?id=P29605093)[7](https://www.mks.com/culture-and-belonging) A company profile lists 10,200 full-time employees as of December 31, 2025. [8](https://finance.yahoo.com/quote/MKSI/profile/) Founded in 1961, MKS states its mission is “to work with you to solve your toughest technology challenges.” [1](https://app.finbar.com/go?id=P88870372)[9](https://www.mks.com/support)
[1](https://app.finbar.com/go?id=P88870372)[2](https://app.finbar.com/go?id=P74920876)[3](https://app.finbar.com/go?id=P27131527)[4](https://app.finbar.com/go?id=P95752846)[5](https://app.finbar.com/go?id=T9486425)[6](https://app.finbar.com/go?id=P29605093)[7](https://www.mks.com/culture-and-belonging)[8](https://finance.yahoo.com/quote/MKSI/profile/)[9](https://www.mks.com/support)[7](https://www.mks.com/culture-and-belonging)[8](https://finance.yahoo.com/quote/MKSI/profile/)[9](https://www.mks.com/support)

## Products & services

MKS Instruments’ Vacuum Solutions Division offers pressure-measurement products; flow and valve technologies; integrated pressure-measurement and control subsystems; microwave and RF power delivery systems and matching networks; metrology products; fiber-optic temperature and position sensors; and remote plasma and ozone generators. These products support pressure and flow control, gas and vapor delivery and analysis, reactive-gas generation, and power delivery for etch, strip, and deposition processes. [3](https://app.finbar.com/go?id=P27131527)[10](https://app.finbar.com/go?id=P58307004)[11](https://app.finbar.com/go?id=P47334867)[12](https://app.finbar.com/go?id=P46032338)[13](https://app.finbar.com/go?id=P8528719) Its Photonics Solutions Division includes continuous-wave and pulsed nanosecond and ultrafast lasers; precision motion control, optical tables and vibration-isolation systems; photonic instruments; optics and opto-mechanical components; and laser and LED measurement products such as power/energy meters and beam profilers. PCB systems serve flexible-interconnect processing and high-density-interconnect production, including blind micro-vias for flexible, rigid-flex, multilayer, and HDI boards and package substrates. [14](https://app.finbar.com/go?id=P101795490)[15](https://app.finbar.com/go?id=P34068052)[16](https://app.finbar.com/go?id=P7475881)[17](https://app.finbar.com/go?id=P108249629)

The Materials Solutions Division supplies chemistry, equipment, and services for surface modification, electroless and electrolytic plating, and surface finishing. Applications include PCB, package-substrate, and wafer manufacturing, as well as decorative, corrosion-protective, and wear-resistant coatings and paint-support pretreatment and stripping. [18](https://app.finbar.com/go?id=P58216831)[19](https://app.finbar.com/go?id=P15091515)[20](https://app.finbar.com/go?id=P59660022)[21](https://app.finbar.com/go?id=P83975242) Services include installation, training, on-site equipment and subsystem maintenance and repair, and depot or authorized-provider repair and calibration. The company also offers Surround the Workpiece® services for laser-based manufacturing, including design, development, system integration, R&D, and field maintenance, repair, and calibration; and Optimize the Interconnect®, combining laser drilling and chemistry solutions for PCB and package-substrate manufacturing. [22](https://app.finbar.com/go?id=P87070361)[23](https://app.finbar.com/go?id=P38890920)[24](https://app.finbar.com/go?id=P69354908)[25](https://app.finbar.com/go?id=P84454291)[26](https://app.finbar.com/go?id=P71472258)[27](https://app.finbar.com/go?id=P61889646)
[3](https://app.finbar.com/go?id=P27131527)[10](https://app.finbar.com/go?id=P58307004)[11](https://app.finbar.com/go?id=P47334867)[12](https://app.finbar.com/go?id=P46032338)[13](https://app.finbar.com/go?id=P8528719)[14](https://app.finbar.com/go?id=P101795490)[15](https://app.finbar.com/go?id=P34068052)[16](https://app.finbar.com/go?id=P7475881)[17](https://app.finbar.com/go?id=P108249629)[18](https://app.finbar.com/go?id=P58216831)[19](https://app.finbar.com/go?id=P15091515)[20](https://app.finbar.com/go?id=P59660022)[21](https://app.finbar.com/go?id=P83975242)[22](https://app.finbar.com/go?id=P87070361)[23](https://app.finbar.com/go?id=P38890920)[24](https://app.finbar.com/go?id=P69354908)[25](https://app.finbar.com/go?id=P84454291)[26](https://app.finbar.com/go?id=P71472258)[27](https://app.finbar.com/go?id=P61889646)

## Geographic presence

In fiscal 2025, MKS Instruments’ revenue by customer ship-to location was led by China at $931 million (23.7% of total) and the United States at $760 million (19.3%). Other reported markets were South Korea ($440 million; 11.2%), Singapore ($265 million; 6.7%), Taiwan ($260 million; 6.6%) and Japan ($240 million; 6.1%); the remaining $1.035 billion (26.3%) was reported as “Other.” International revenue was approximately 81% of total revenue. These figures reflect end-customer shipping destinations, not the locations of MKS operations. [6](https://app.finbar.com/go?id=P29605093)[28](https://app.finbar.com/go?id=T9659501)

MKS reported sites in 37 countries. Its manufacturing footprint included Austria, Brazil, Canada, China, France, Germany, India, Israel, Italy, Japan, Malaysia, Mexico, Romania, Singapore, Slovenia, South Korea, Taiwan and the United States. At year-end 2025, the company was building a facility in Thailand and fitting out another facility in Malaysia; it also reported significant subcontracted operations in Mexico and selected contract manufacturers in Asia. [29](https://app.finbar.com/go?id=P100139438)[30](https://app.finbar.com/go?id=P93470237)

Examples of listed facilities include sites in China, Germany, India, Mexico, Romania, Slovenia and South Korea, as well as U.S. locations including Andover, Beaverton, Broomfield, Irvine, Milpitas, Rochester, Rock Hill and Wilmington. The facilities support activities such as manufacturing, research and development, sales, service and warehousing; Andover, Massachusetts is the corporate headquarters. [31](https://app.finbar.com/go?id=T8836354)

At December 31, 2025, MKS reported approximately 10,300 workforce members, excluding contracted employees. Employees were distributed 33% in Asia-Pacific, 34% in Europe, Middle East and India, and 33% in the Americas; the company did not report employee counts by individual country. [29](https://app.finbar.com/go?id=P100139438)
[6](https://app.finbar.com/go?id=P29605093)[28](https://app.finbar.com/go?id=T9659501)[29](https://app.finbar.com/go?id=P100139438)[30](https://app.finbar.com/go?id=P93470237)[31](https://app.finbar.com/go?id=T8836354)

## Business segments

MKS Instruments reports three operating divisions as reportable segments. Vacuum Solutions Division (VSD) supplies vacuum and pressure measurement and control, gas and vapor delivery, power-delivery, and plasma/reactive-gas technologies used in semiconductor manufacturing, electronics and packaging, and specialty-industrial applications. [32](https://app.finbar.com/go?id=P94688721)[33](https://app.finbar.com/go?id=P38850194) Photonics Solutions Division (PSD) focuses on lasers, optics, photonics, precision motion and vibration control, including laser-based systems for printed circuit boards and package substrates. [3](https://app.finbar.com/go?id=P27131527)[10](https://app.finbar.com/go?id=P58307004) Materials Solutions Division (MSD) provides surface-modification, plating and finishing technologies, including chemistry, equipment and related services. [11](https://app.finbar.com/go?id=P47334867)[12](https://app.finbar.com/go?id=P46032338) Global service activities span the divisions, and related service revenue is reported within the segments. [13](https://app.finbar.com/go?id=P8528719)[14](https://app.finbar.com/go?id=P101795490)

For FY2025, segment revenue was approximately $1.579 billion for VSD (40.2% of consolidated revenue), $1.029 billion for PSD (26.2%), and $1.323 billion for MSD (33.6%). Percentages are calculated from reported segment revenue and consolidated revenue of $3.931 billion. [15](https://app.finbar.com/go?id=P34068052)[16](https://app.finbar.com/go?id=P7475881)[17](https://app.finbar.com/go?id=P108249629)[18](https://app.finbar.com/go?id=P58216831)[34](https://app.finbar.com/go?id=P100227733)[35](https://investor.mks.com/static-files/69366eb4-123b-4ad9-9cd5-9d79087f77f6)

The company also presents revenue by end market, a separate view from its reportable segments: Semiconductor accounted for about 43% of FY2025 revenue, Electronics and Packaging 28%, and Specialty Industrial 29%. [34](https://app.finbar.com/go?id=P100227733)[35](https://investor.mks.com/static-files/69366eb4-123b-4ad9-9cd5-9d79087f77f6)
[32](https://app.finbar.com/go?id=P94688721)[33](https://app.finbar.com/go?id=P38850194)[3](https://app.finbar.com/go?id=P27131527)[10](https://app.finbar.com/go?id=P58307004)[11](https://app.finbar.com/go?id=P47334867)[12](https://app.finbar.com/go?id=P46032338)[13](https://app.finbar.com/go?id=P8528719)[14](https://app.finbar.com/go?id=P101795490)[15](https://app.finbar.com/go?id=P34068052)[16](https://app.finbar.com/go?id=P7475881)[17](https://app.finbar.com/go?id=P108249629)[18](https://app.finbar.com/go?id=P58216831)[34](https://app.finbar.com/go?id=P100227733)[35](https://investor.mks.com/static-files/69366eb4-123b-4ad9-9cd5-9d79087f77f6)[35](https://investor.mks.com/static-files/69366eb4-123b-4ad9-9cd5-9d79087f77f6)

## Company history

Founded in Massachusetts in 1961, MKS Instruments began with the Baratron capacitance manometer, a pressure-measurement instrument for semiconductor manufacturing. It filed an IPO prospectus in 1999, then expanded through acquisitions around 2000, including ASTeX, whose merger was completed in 2001. [36](https://app.finbar.com/go?id=P91229075)[37](https://www.mks.com/pr/650) [38](https://www.sec.gov/Archives/edgar/data/1049502/0000950135-99-001680.txt) [39](https://investor.mks.com/static-files/a6310b4f-38a7-4129-a558-dd86a9ae539c) [40](https://investor.mks.com/static-files/b70b012e-b0f3-4c71-adda-5506d811c9dc)

In 2014, MKS acquired Granville-Phillips, adding vacuum measurement and control instrumentation, and in 2016 it acquired Newport Corporation, extending into photonics, lasers, optics, and precision motion control. It acquired Electro Scientific Industries in 2019, adding laser-based manufacturing capabilities, and Atotech in 2022, broadening its business into process chemicals and equipment for electronics manufacturing and packaging. [41](https://investors.azenta.com/news-releases?item=95) [42](https://investor.mks.com/news-releases/news-release-details/mks-instruments-announces-closing-acquisition-newport) [16](https://app.finbar.com/go?id=P7475881) [43](https://www.mks.com/pr/esi-acquisition-closing1) [44](https://app.finbar.com/go?id=P195261175) [45](https://www.atotech.com/mks-instruments-announces-closing-of-atotech-acquisition/) [46](https://app.finbar.com/go?id=P112615363)

John T.C. Lee became president and CEO in January 2020. In 2025, following shareholder approval, the company changed its name from MKS Instruments, Inc. to MKS Inc. [47](https://www.mks.com/john-lee-biography) [48](https://www.sec.gov/Archives/edgar/data/1049502/000095017025072053/mksi-ex99_1.htm) [49](https://app.finbar.com/go?id=P17032717)
[36](https://app.finbar.com/go?id=P91229075)[37](https://www.mks.com/pr/650)[38](https://www.sec.gov/Archives/edgar/data/1049502/0000950135-99-001680.txt)[39](https://investor.mks.com/static-files/a6310b4f-38a7-4129-a558-dd86a9ae539c)[40](https://investor.mks.com/static-files/b70b012e-b0f3-4c71-adda-5506d811c9dc)[41](https://investors.azenta.com/news-releases?item=95)[42](https://investor.mks.com/news-releases/news-release-details/mks-instruments-announces-closing-acquisition-newport)[16](https://app.finbar.com/go?id=P7475881)[43](https://www.mks.com/pr/esi-acquisition-closing1)[44](https://app.finbar.com/go?id=P195261175)[45](https://www.atotech.com/mks-instruments-announces-closing-of-atotech-acquisition/)[46](https://app.finbar.com/go?id=P112615363)[47](https://www.mks.com/john-lee-biography)[48](https://www.sec.gov/Archives/edgar/data/1049502/000095017025072053/mksi-ex99_1.htm)[49](https://app.finbar.com/go?id=P17032717)[37](https://www.mks.com/pr/650)[38](https://www.sec.gov/Archives/edgar/data/1049502/0000950135-99-001680.txt)[39](https://investor.mks.com/static-files/a6310b4f-38a7-4129-a558-dd86a9ae539c)[40](https://investor.mks.com/static-files/b70b012e-b0f3-4c71-adda-5506d811c9dc)[41](https://investors.azenta.com/news-releases?item=95)[42](https://investor.mks.com/news-releases/news-release-details/mks-instruments-announces-closing-acquisition-newport)[43](https://www.mks.com/pr/esi-acquisition-closing1)[45](https://www.atotech.com/mks-instruments-announces-closing-of-atotech-acquisition/)[47](https://www.mks.com/john-lee-biography)[48](https://www.sec.gov/Archives/edgar/data/1049502/000095017025072053/mksi-ex99_1.htm)

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