MKS INC
Close on Oct 19, 2026
- Market cap
- $15.66B
- P/E (TTM)
- 34.4
- Dividend yield
- 0.41%
About MKS
Industrial Instruments For Measurement, Display, and Control, SIC 3823
MKS Inc. develops, manufactures, and supplies advanced process technologies, critical equipment solutions, and specialized materials. The company operates through three principal business divisions: Vacuum Solutions, Photonics Solutions, and Materials Solutions. Across these segments, MKS provides both integrated hardware products and related support services designed for demanding advanced manufacturing processes. Its commercial customer base spans high-technology sectors, serving clients focused primarily on semiconductor manufacturing, electronics and packaging applications, and specialty industrial markets.
The company conducts business and maintains operations across numerous international regions, including the United States, Germany, China, Taiwan, South Korea, Japan, Singapore, Israel, the Netherlands, Canada, and Hong Kong. Incorporated under the laws of Massachusetts, MKS Inc. operates its corporate headquarters and principal executive offices from Andover, Massachusetts.
Summary of the business section of MKS's latest annual report, written by StockData.
Company profile
Company
- Legal name
- MKS INC
- Founded
- 1961
- Headquarters
- Andover, MA
- Address
- 2 Tech Drive 01810
- Phone
- (978) 645-5500
- Website
- www.mks.com
- Employees
- 10,300, Dec 31, 2025
- Industry
- Industrial Instruments For Measurement, Display, and Control
- Incorporated in
- Massachusetts
- Fiscal year ends
- December 31
- Auditor
- PricewaterhouseCoopers LLP, Boston, Massachusetts
Stock & identifiers
- Ticker
- MKSI
- Exchange
- Nasdaq
- IPO date
- Mar 30, 1999
- Shares outstanding
- 68M, Jul 28, 2026
- Public float
- $6.67B, Jun 30, 2025
- Filer category
- Large accelerated filer
- SEC CIK
- 1049502
- CUSIP
- 55306N104
- ISIN
- US55306N1046
- LEI
- 549300KEQATBHAGVF505
- EIN
- 04-2277512
Executives and directors
Officers and directors who filed ownership reports (Forms 3, 4, 5) in the last two years
| Name | Position | Shares owned |
|---|---|---|
| John Tseng-Chung Lee | President & CEO, Director | 134,776 |
| Renee Martel Donlan | EVP, GC & CCO | 9,472 |
| John Edward Williams | EVP & GM, PSD | 4,098 |
| James Alan Schreiner | EVP & COO | 19,201 |
| Michelle M. McCarthy | SVP & Chief Accounting Officer | 2 |
| David Philip Henry | EVP, Global Str Mktg & GM, MSD | 10,422 |
| Ramakumar Mayampurath | EVP & CFO | 1 |
| Eric Robert Taranto | EVP & GM, VSD | 12,596 |
| Kathleen Flaherty Burke | EVP, GC & Secretary | 49,439 |
| Elizabeth Mora | Director | 18,845 |
| Gerald G. Colella | Director | 29,016 |
| Joseph B. Donahue | Director | 10,033 |
| Peter Cannone Iii | Director | 7,794 |
| Jacqueline F. Moloney | Director | 8,775 |
| Raj Batra | Director | 16,227 |
| Wissam G. Jabre | Director | 5,270 |
CEO pay and shareholder return
Pay versus performance table from the proxy statement
| Fiscal year | CEO total pay | CEO pay actually paid | Other executives (avg) | Value of $100 invested | Peer group |
|---|---|---|---|---|---|
| FY2025 | $12.96M | $24.97M | $2.83M | $110 | $205 |
| FY2024 | $8.76M | $7.39M | $1.95M | $72 | $142 |
| FY2024 Lee | $8.76M | $7.39M | $1.95M | $72 | $142 |
| FY2023 | $7.91M | $13.22M | $2.12M | $70 | $122 |
| FY2023 Lee | $7.91M | $13.22M | $2.12M | $70 | $122 |
| FY2022 | $8.06M | $3.49M | $2.05M | $57 | $101 |
“Actually paid” adjusts reported pay for changes in the value of equity awards. Shareholder return assumes $100 invested at the start of the measurement period, as disclosed by the company.
Employees
Headcount reported in annual reports
“As of December 31, 2025, we had a total workforce of approximately 10,300 individuals, excluding contracted employees.”
Corporate history
Events identified from SEC filings
| Date | Event | Details |
|---|---|---|
| May 15, 2025 | Name change | Name changed from MKS INSTRUMENTS INC to MKS INC |
| Feb 27, 2023 | Late filing | Notification of late filing |
| Aug 17, 2022 | Acquisition / sale | Completion of acquisition or disposition of assets (8-K Item 2.01) |
| Feb 1, 2019 | Acquisition / sale | Completion of acquisition or disposition of assets (8-K Item 2.01) |
| Apr 29, 2016 | Acquisition / sale | Completion of acquisition or disposition of assets (8-K Item 2.01) |
| Dec 4, 2001 | Merger vote | Definitive merger proxy statement |
| Nov 13, 2000 | Merger | Registration of securities for a merger or exchange offer (S-4) |