MKSI on Nasdaq

MKS INC

American industrial instruments for measurement company based in Andover2

In its 2026 annual report the company says: “We deliver foundational technology solutions to leading edge semiconductor manufacturing, electronics and packaging, and specialty industrial applications. We apply our broad science and engineering capabilities to create instruments, subsystems, systems, process control solutions and specialty chemicals technology that improve process performance, optimize productivity and enable unique innovations for many of the world’s leading technology and industrial companies.”6 Its shares trade on Nasdaq under the symbol MKSI.2

$225.48 down 9.02 (3.85%)Price as of Oct 15, 2026 at 17:33 UTC

Last updated Oct 21, 2026.

Overview

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  • TickerMKSI on Nasdaq2
  • IndustryIndustrial Instruments For Measurement, Display, and Control2
  • HeadquartersAndover, United States2
  • Incorporated inMA4
  • Business address2 Tech Drive, Andover, Ma 018104
  • Filer categoryLarge accelerated filer4
  • Legal formDomestic Business Corporation2
  • LEI549300KEQATBHAGVF5052
  • StatusActive2
  • LEI statusIssued and current2
  • Registered addressC/O COGENCY GLOBAL INC., 02108 Boston, United States2
  • Registered withCorporations Division (Secretary of the Commonwealth's Office), 0422775122

MKS Inc., formerly known as MKS Instruments, Inc. (“MKS,” the “Company,” “our,” or “we”), was founded in 1961 as a Massachusetts corporation. We enable technologies that transform our world. We deliver foundational technology solutions to leading edge semiconductor manufacturing, electronics and packaging, and specialty industrial applications. We apply our broad science and engineering capabilities to create instruments, subsystems, systems, process control solutions and specialty chemicals technology that improve process performance, optimize productivity and enable unique innovations for many of the world’s leading technology and industrial companies. Our solutions are critical to addressing the challenges of miniaturization and complexity in advanced device manufacturing by enabling increased power, speed, feature enhancement and optimized connectivity. Our solutions are also critica…6 From its latest annual report

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Key numbers, fiscal 2025

46.7%Gross margin7
13.4%Operating margin7
7.5%Net margin7
9.6%Revenue growth, 20257
10.8%Return on equity7
1.53×Debt to equity7
$497.0MFree cash flow7

What sells

Revenue by product, business segment and region, as the company reports it to the SEC.

Products and services

Semiconductor brought in 43% of the revenue MKS INC broke down this way in fiscal 2025.

  1. Semiconductor$1.7B743%up 13% from 2024
  2. Specialty Industrial$1.1B729%down 4% from 2024
  3. Electronics and Packaging$1.1B728%up 20% from 2024
Products and services by year
Products and services202320242025
Semiconductor$1.5B$1.5B$1.7B
Specialty Industrial$1.2B$1.2B$1.1B
Electronics and Packaging$916.0M$922.0M$1.1B

Business segments

Vacuum Solutions Division brought in 40% of the revenue MKS INC broke down this way in fiscal 2025.

  1. Vacuum Solutions Division$1.6B740%up 14% from 2024
  2. Materials Solutions Division$1.3B734%up 12% from 2024
  3. Photonics Solutions Division$1.0B726%up 1% from 2024
Business segments by year
Business segments202320242025
Vacuum Solutions Division$1.4B$1.4B$1.6B
Materials Solutions Division$1.2B$1.2B$1.3B
Photonics Solutions Division$976.0M$1.0B$1.0B

Regions

Other Countries brought in 26% of the revenue MKS INC broke down this way in fiscal 2025.

  1. Other Countries$1.0B726%up 11% from 2024
  2. China$931.0M724%up 20% from 2024
  3. United States$760.0M719%down 5% from 2024
  4. South Korea$440.0M711%up 23% from 2024
  5. Singapore$265.0M77%up 16% from 2024
  6. Taiwan$260.0M77%up 11% from 2024
  7. Japan$240.0M76%down 4% from 2024
Regions by year
Regions202320242025
Other Countries$858.0M$936.0M$1.0B
China$745.0M$775.0M$931.0M
United States$893.0M$804.0M$760.0M
South Korea$359.0M$358.0M$440.0M
Singapore$239.0M$229.0M$265.0M
Taiwan$248.0M$234.0M$260.0M
Japan$280.0M$250.0M$240.0M

Where the money goes

Where each dollar of revenue went, fiscal 2025

  • Research and development8¢$299.0M
  • Selling, general and admin18¢$724.0M
  • Other costs61¢$2.4B
  • Interest5¢$212.0M
  • Income tax0¢$9.0M
  • Profit8¢$295.0M

Out of $3.9B in revenue.7

Where each dollar of operating cash went, fiscal 2025

  • Capital spending23¢$148.0M
  • Dividends paid9¢$59.0M
  • Share buybacks7¢$45.0M
  • Kept or used elsewhere61¢$393.0M

Out of $645.0M of cash from operations.7

Financial statements

Revenue8910117$3.9B in 2025+107% since 2019
0$1.0B$2.0B$3.0B$4.0B2019: $1.9B$1.9B20192020: $2.3B$2.3B2020+23%2021: $3.0B$3.0B2021+27%2022: $3.5B$3.5B2022+20%2023: $3.6B$3.6B2023+2%2024: $3.6B$3.6B2024−1%2025: $3.9B$3.9B2025+10%
Gross profit8910117$1.8B in 2025+121% since 2019
0$500.0M$1.0B$1.5B$2.0B2019: $830.4M$830.4M20192020: $1.0B$1.0B2020+26%2021: $1.4B$1.4B2021+32%2022: $1.5B$1.5B2022+12%2023: $1.6B$1.6B2023+6%2024: $1.7B$1.7B2024+4%2025: $1.8B$1.8B2025+8%
Operating income8910117$528.0M in 2025+140% since 2019
-$2.0B-$1.0B0$1.0B2019: $219.8M$219.8M20192020: $454.0M$454.0M2020+107%2021: $699.0M$699.0M2021+54%2022: $617.0M$617.0M2022−12%2023: -$1.6B-$1.6B20232024: $498.0M$498.0M20242025: $528.0M$528.0M2025+6%
Net income8910117$295.0M in 2025+110% since 2019
-$2.0B-$1.0B0$1.0B2019: $140.4M$140.4M20192020: $350.0M$350.0M2020+149%2021: $551.0M$551.0M2021+57%2022: $333.0M$333.0M2022−40%2023: -$1.8B-$1.8B20232024: $190.0M$190.0M20242025: $295.0M$295.0M2025+55%

Every line of the income statement as filed: the last 3 fiscal years, latest first.7

Period ending2025-12-312024-12-312023-12-31
Net revenues$3.9B$3.6B$3.6B
Cost of revenues$2.1B$1.9B$2.0B
Gross profit$1.8B$1.7B$1.6B
Research and development$299.0M$271.0M$288.0M
Selling, general and administrative$724.0M$674.0M$675.0M
Acquisition and integration costs$0$9.0M$16.0M
Restructuring and other$37.0M$6.0M$20.0M
Fees and expenses related to amendments to the Term Loan Facility$2.0M$5.0M$2.0M
Amortization of intangible assets$247.0M$245.0M$295.0M
Goodwill and intangible asset impairments$0$0$1.9B
Gain on sale of long-lived assets$0$0-$2.0M
Income (loss) from operations$528.0M$498.0M-$1.6B
Interest income-$14.0M-$21.0M-$17.0M
Interest expense$212.0M$284.0M$356.0M
Loss on extinguishment of debt-$10.0M-$57.0M-$8.0M
Other expense (income), net$16.0M-$2.0M$27.0M
Income (loss) before income taxes$304.0M$180.0M-$1.9B
(Benefit) provision for income taxes$9.0M-$10.0M-$87.0M
Net income (loss)$295.0M$190.0M-$1.8B
Changes in value of financial instruments designated as cash flow hedges-$29.0M-$1.0M-$24.0M
Foreign currency translation adjustments$237.0M-$213.0M-$83.0M
Change in net investment hedge-$63.0M$36.0M-$25.0M
Unrecognized pension gain (loss)$10.0M$3.0M-$9.0M
Unrealized gain (loss) on investments$0$23.0M-$23.0M
Total comprehensive income (loss)$450.0M$38.0M-$2.0B
Basic$4.39$2.82-$27.54
Diluted$4.37$2.81-$27.54
Basic67.3M shares67.3M shares66.8M shares
Diluted67.7M shares67.6M shares66.8M shares

Compare MKS INC with another company

Corporate structure

MKS INC sits at the top of its group. 88 entities, 34 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of MKS INC

  • MKS INC Andover, Massachusetts, United States
    • Electro Scientific Industries Beaverton, Oregon, United States
    • Alpha 2 B.V. Subsidiary · Netherlands
    • Alpha 3 B.V. Subsidiary · Netherlands
    • Alpha 4 B.V. Subsidiary · Netherlands
    • Alpha Germany Bidco GmbH Subsidiary · Germany
    • Alpha Treasury Services B.V. Subsidiary · Netherlands
    • Atotech (China) Chemicals Ltd. Subsidiary · China
    • Atotech (Malaysia) Sdn. Bhd. Subsidiary · Malaysia
    • Atotech (Philippines) Chemicals, Inc. Subsidiary · Philippines
    • Atotech (Singapore) Chemicals Pte. Ltd. Subsidiary · Singapore
    • Atotech (Thailand) Co., Ltd. Subsidiary · Thailand
    • Atotech (Yangzhou) Chemicals Ltd. Subsidiary · China
    • Atotech Argentina SA Subsidiary · Argentina
    • Atotech Asia Pacific Limited Subsidiary · Hong Kong
    • Atotech Asset Management GmbH Subsidiary · Germany
    • Atotech B.V. Subsidiary · Netherlands
    • Atotech Beteiligungs und Management GmbH & Co. KG Subsidiary · Germany
    • Atotech Canada Ltd. Subsidiary · Canada
    • Atotech CZ, a.s. Subsidiary · Czechia
    • Atotech de Mexico S.A. de C.V. Subsidiary · Mexico
    • Atotech Deutschland GmbH & Co. KG Subsidiary · Germany
    • Atotech Development Center Private Limited Subsidiary · India
    • Atotech do Brasil Galvanotecnica Ltda. Subsidiary · Brazil
    • Atotech España, S.A. Unipersonal Subsidiary · Spain
    • Atotech France S.A.S Subsidiary · France
    • and 62 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What MKS INC reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Property and equipment

ItemLatestA year beforeChange
Property and equipment, before depreciation$1.7B7 Dec 31, 2025$1.5B7 Dec 31, 2024+10.7%
Accumulated depreciation$859.0M7 Dec 31, 2025$736.0M7 Dec 31, 2024+16.7%
Property and equipment, net$810.0M7 Dec 31, 2025$771.0M7 Dec 31, 2024+5.1%
Operating-lease assets (leased space)$270.0M7 Dec 31, 2025$238.0M7 Dec 31, 2024+13.4%

Investments

ItemLatestA year beforeChange
Cash and cash equivalents$418.0M7 Dec 31, 2025$420.0M7 Dec 31, 2024−0.5%

Intangibles and goodwill

ItemLatestA year beforeChange
Goodwill$2.6B7 Dec 31, 2025$2.5B7 Dec 31, 2024+3.8%
Finite-lived intangibles, gross$3.7B7 Dec 31, 2025$3.7B7 Dec 31, 20240%
Accumulated amortization$1.4B7 Dec 31, 2025$1.1B7 Dec 31, 2024+22.4%
Finite-lived intangibles, net$2.1B7 Dec 31, 2025$2.3B7 Dec 31, 2024−5.8%

Inventory

ItemLatestA year beforeChange
Inventory, total$921.0M7 Dec 31, 2025$893.0M7 Dec 31, 2024+3.1%
Raw materials$617.0M7 Dec 31, 2025$618.0M7 Dec 31, 2024−0.2%
Work in process$116.0M7 Dec 31, 2025$97.0M7 Dec 31, 2024+19.6%
Finished goods$188.0M7 Dec 31, 2025$178.0M7 Dec 31, 2024+5.6%

Properties, in its own words

The following table provides information concerning MKS’ principal and certain other owned and leased facilities as of December 31, 2025:

Country · City · Sq. Ft. · Activity · Reportable Segment · Owned/Leased

The rest of Item 2

China · Guangzhou · 704,000 · Manufacturing, Warehouse, Sales, and Research and Development · MSD · Owned

Shenzhen · 293,000 · Manufacturing and Service · VSD · Leased

Yangzhou · 455,000 · Manufacturing, Warehouse, and Office · MSD · Owned

Germany · Berlin · 261,000 · Manufacturing, Office, and Research and Development · MSD · Leased

Feucht · 242,000 · Manufacturing, Warehouse, Office, and Research and Development · MSD · Owned

Neuruppin · 172,000 · Manufacturing, Warehouse, Office, and Research and Development · MSD · Owned

India · Manesar · 189,000 · Manufacturing and Research and Development · MSD · Owned

Mexico · Nogales · 124,000 · Manufacturing and Service · VSD and PSD · Leased

Romania · Bucharest · 131,000 · Manufacturing, Office, Research and Development, Service, and Warehouse · PSD · Leased

Slovenia · Podnart · 108,000 · Lab, Manufacturing, Office, Service, Warehouse, and Sales · MSD · Owned

South Korea · Hwaseong · 100,000 · Manufacturing, Sales, and Office · MSD · Owned

Yongin-si · 179,000 · Research and Development, Office, Warehouse, Service, and Sales · VSD · Owned

United States · Andover, MA · 76,000 · Corporate Headquarters, Manufacturing, and Research and Development · VSD · Leased

Beaverton, OR · 113,000 · Manufacturing, Office, and Warehouse · PSD · Leased

Broomfield, CO · 107,000 · Manufacturing and Research and Development · VSD · Leased

Irvine, CA · 191,000 · Manufacturing and Research and Development · PSD · Leased

Milpitas, CA · 103,000 · Manufacturing, Sales, Customer Support, Service, and Research and Development · PSD · Leased

Rochester, NY · 156,000 · Manufacturing, Sales, Customer Support, Service, and Research and Development · VSD · Owned

Rock Hill, SC · 200,000 · Manufacturing, Warehouse, Office, and Research and Development · MSD · Owned

Wilmington, MA · 118,000 · Manufacturing, Customer Support, Service, and Research and Development · VSD · Owned

In addition to the significant facilities listed above, MKS also has manufacturing, sales and marketing, customer support and services operations in various other leased and owned facilities throughout the world. See “Business—Sales and Marketing” and “Business—Reportable Segments, and Product and Service Offerings” in Part I, Item 1 of this Annual Report on Form 10-K. We believe that our current facilities are suitable and adequate to meet our needs.

Item 2 of the 10-K filed Feb 24, 2026.6

Leadership

Who has led MKS INC, and when. Pick a name to see everywhere that person has worked.

Board members and other officers (33)

Subsidiaries and ownership

Subsidiaries (Exhibit 21)

  • Alpha 2 B.V. Netherlands5
  • Alpha 3 B.V. Netherlands5
  • Alpha 4 B.V. Netherlands5
  • Alpha Germany Bidco GmbH Germany5
  • Alpha Treasury Services B.V. Netherlands5
  • Atotech (China) Chemicals Ltd. China5
  • Atotech (Malaysia) Sdn. Bhd. Malaysia5
  • Atotech (Philippines) Chemicals, Inc. Philippines5
  • Atotech (Singapore) Chemicals Pte. Ltd. Singapore5
  • Atotech (Thailand) Co., Ltd. Thailand5
  • Atotech (Yangzhou) Chemicals Ltd. China5
  • Atotech Argentina SA Argentina5
  • Atotech Asia Pacific Limited Hong Kong5
  • Atotech Asset Management GmbH Germany5
  • Atotech B.V. Netherlands5
  • Atotech Beteiligungs und Management GmbH & Co. KG Germany5
  • Atotech CZ, a.s. Czech Republic5
  • Atotech Canada Ltd. Canada5
  • Atotech Deutschland GmbH & Co. KG Germany5
  • Atotech Development Center Private Limited India5
  • Atotech España, S.A. Unipersonal Spain5
  • Atotech France S.A.S France5
  • Atotech Global Services Private Limited India5
  • Atotech India Private Limited India5
All 91 listed subsidiaries
  • Atotech Istanbul Kimya S. Ltd. Sirketi Turkey5
  • Atotech Italia S.r.l. Italy5
  • Atotech Japan K.K. Japan5
  • Atotech Limited Jersey5
  • Atotech Manufacturing, Inc. Delaware5
  • Atotech Poland Sp. z.o.o. Poland5
  • Atotech SK, s.r.o. Slovakia5
  • Atotech Skandinavien AB Sweden5
  • Atotech Slovenija d.d. Slovenia5
  • Atotech Taiwan Ltd. Taiwan5
  • Atotech UK Limited United Kingdom5
  • Atotech USA, LLC Delaware5
  • Atotech Vietnam Company Limited Vietnam5
  • Atotech de Mexico S.A. de C.V. Mexico5
  • Atotech do Brasil Galvanotecnica Ltda. Brazil5
  • Atotech Österreich GmbH Austria5
  • Atotech-Chemeta Limited Liability Company Russian Federation5
  • ESI China, Inc. Oregon5
  • ESI Electronic Equipment (Shanghai) Co., Ltd. China5
  • ESI International Corporation Oregon5
  • ESI Japan, K.K. Japan5
  • ESI Vietnam Company Limited Vietnam5
  • Electro Scientific Industries Europe Ltd United Kingdom5
  • Electro Scientific Industries GmbH Germany5
  • Electro Scientific Industries Singapore Pte. Ltd. Singapore5
  • Electro Scientific Industries, Inc. Oregon5
  • High Q Laser GmbH Austria5
  • Hilger Analytical Limited United Kingdom5
  • Iota Solutions Deutschland GmbH Germany5
  • Iota Solutions Netherlands B.V. Netherlands5
  • MKS Denmark ApS Denmark5
  • MKS Instruments (China) Company Ltd. China5
  • MKS Instruments (Hong Kong) Limited Hong Kong5
  • MKS Instruments (Singapore) Pte. Ltd. Singapore5
  • MKS Instruments (Thailand) Co., Ltd. Thailand5
  • MKS Instruments Deutschland GmbH Germany5
  • MKS Instruments ESI Switzerland GmbH Switzerland5
  • MKS Instruments Holdings Ltd United Kingdom5
  • MKS Instruments Israel Ltd. Israel5
  • MKS Instruments Italy S.r.l. Italy5
  • MKS Instruments Malaysia Sdn. Bhd. Malaysia5
  • MKS Instruments Mexico S. de R.L. de C.V. Mexico5
  • MKS Instruments UK Limited United Kingdom5
  • MKS Japan, Inc. Japan5
  • MKS Spectra Holdings Limited United Kingdom5
  • MKS Taiwan Technology Limited Taiwan5
  • Micro-Controle Spectra-Physics S.A.S. France5
  • Newport Corporation Nevada5
  • Newport Instruments Canada Corporation Canada5
  • Newport Laser Holding GmbH Austria5
  • Newport Ophir Holdings Ltd. Israel5
  • Newport Opto-Electronics Technologies (Singapore) Pte. Ltd. Singapore5
  • Newport Opto-Electronics Technologies (Wuxi) Company Limited China5
  • Newport Spectra-Physics B.V. Netherlands5
  • Newport Spectra-Physics GmbH Germany5
  • Newport Spectra-Physics Limited United Kingdom5
  • Ophir Japan Ltd. Japan5
  • Ophir Optics S.R.L. Romania5
  • Ophir Optronics Ltd. Israel5
  • Ophir Optronics Solutions Ltd. Israel5
  • Ophir Spiricon Europe GmbH Germany5
  • Photon Control (USA) Inc. Delaware5
  • Photon Control Inc. Canada5
  • Pt. Atotech Indonesia Chemicals Indonesia5
  • Spectra-Physics, K.K. Japan5
  • Theta Solutions USA, LLC Delaware5
  • V-Gen Ltd. Israel5

The subsidiaries the company lists in Exhibit 21 of its annual report, as filed.

Former names

  • MKS INSTRUMENTS INCNov 14, 1997 to May 15, 20254

Timeline

  1. Aug 5, 20268-K Results of operations55
  2. May 12, 20268-K Executive or director change; Shareholder vote56
  3. May 6, 20268-K Results of operations57
  4. Apr 6, 20268-K Executive or director change58
  5. Feb 17, 20268-K Results of operations59
  6. Feb 5, 20268-K Entered a material agreement; New debt or obligation; Regulation FD disclosure60
  7. Jan 28, 20268-K Other events61
  8. Jan 21, 20268-K Results of operations; Regulation FD disclosure62
  9. Nov 5, 20258-K Results of operations63
  10. Aug 6, 20258-K Results of operations64
  11. May 15, 20258-K Change to shareholders' rights; Executive or director change; Bylaws or fiscal year changed65
  12. May 7, 20258-K Results of operations66
  13. Feb 3, 2014New chief executive Gerard G. Colella becomes CEO15
  14. Feb 15, 2006New chief executive Leo Berlinghieri becomes CEO16
  15. Jun 14, 1961Founded MKS INC is founded2

Calendar

Coming up

  1. Nov 4, 2026 · After the closeReports results for the quarter ending Sep/2026 A year earlier it reported $1.93 a share, on Nov 5, 2025.67

When it reported results

  1. Aug 5, 2026Reported quarterly or annual results55
  2. May 6, 2026Reported quarterly or annual results57
  3. Feb 17, 2026Reported quarterly or annual results59
  4. Jan 21, 2026Reported quarterly or annual results62
  5. Nov 5, 2025Reported quarterly or annual results63
  6. Aug 6, 2025Reported quarterly or annual results64
  7. May 7, 2025Reported quarterly or annual results66
  8. Feb 12, 2025Reported quarterly or annual results68

Upcoming dates from Nasdaq's calendar; past results from the company's 8-K filings (Item 2.02). The full markets calendar

Filings

464 filings to the SEC since October 2021: 5 annual reports, 15 quarterly reports, 59 major events, 242 insider forms, 38 large holders, 105 other. The latest 20:

  1. Sep 3, 2026SCHEDULE 13G/A EDGAR
  2. Sep 2, 20264 PRIMARY DOCUMENT EDGAR
  3. Sep 1, 2026144 EDGAR
  4. Aug 18, 20264 PRIMARY DOCUMENT EDGAR
  5. Aug 17, 20264 PRIMARY DOCUMENT EDGAR
  6. Aug 14, 2026144 EDGAR
  7. Aug 6, 202610-Q EDGAR
  8. Aug 5, 20268-K EDGAR
  9. Aug 4, 20264 PRIMARY DOCUMENT EDGAR
  10. Aug 3, 2026144 EDGAR
  11. Jul 24, 2026SCHEDULE 13G/A EDGAR
  12. Jul 16, 2026SCHEDULE 13G EDGAR
  13. Jun 16, 20264 PRIMARY DOCUMENT EDGAR
  14. Jun 12, 2026144 EDGAR
  15. Jun 11, 20264 PRIMARY DOCUMENT EDGAR
  16. Jun 10, 2026144 EDGAR
  17. Jun 8, 20264 PRIMARY DOCUMENT EDGAR
  18. Jun 5, 2026144 EDGAR
  19. Jun 4, 20263 PRIMARY DOCUMENT EDGAR
  20. Jun 2, 20264 PRIMARY DOCUMENT EDGAR

The 464 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

83 open-market trades by officers, directors and large owners since October 2021: 3 buys and 80 sales. Grants, option exercises and gifts are left out.

DateWhoTradeSharesPriceValueFiling
Sep 1, 2026Mora ElizabethDirectorSale300$250.96$75.3KForm 4
Aug 14, 2026Lee John Tseng-ChungPresident & CEOSale10,000$302.01$3.0MForm 4
Aug 3, 2026Williams John EdwardEVP & GM, PSDSale457$288.31$131.8KForm 4
Jun 12, 2026Schreiner James AlanEVP & COOSale3,500$345.82$1.2MForm 4
Jun 10, 2026Schreiner James AlanEVP & COOSale781$317.42$247.9KForm 4
Jun 5, 2026McCarthy Michelle MSVP & Chief Accounting OfficerSale2,434$315.23$767.3KForm 4
Jun 1, 2026Henry David PhilipEVP, Global Str Mktg & GM, MSDSale6,000$314.43$1.9MForm 4
Jun 1, 2026Mora ElizabethDirectorSale300$318.02$95.4KForm 4
May 27, 2026Donahue Joseph BDirectorSale2,100$327.95$688.7KForm 4
May 27, 2026COLELLA GERALD GDirectorSale20,000$333.40$6.7MForm 4
May 26, 2026Henry David PhilipEVP, Global Str Mktg & GM, MSDSale2,500$330.50$826.2KForm 4
May 22, 2026Mayampurath RamakumarEVP & CFOSale8,810$315.48$2.8MForm 4
May 22, 2026Lee John Tseng-ChungPresident & CEOSale10,000$315.48$3.2MForm 4
May 18, 2026CANNONE PETER IIIDirectorSale1,350$303.40$409.6KForm 4
May 14, 2026Moloney Jacqueline FDirectorSale1,000$312.20$312.2KForm 4
May 13, 2026Moloney Jacqueline FDirectorSale1,400$318.99$446.6KForm 4
May 11, 2026Taranto Eric RobertEVP & GM, VSDSale2,849$319.93$911.3KForm 4
May 11, 2026Burke Kathleen FlahertyEVP, GC & SecretarySale4,355$319.94$1.4MForm 4
Mar 12, 2026Moloney Jacqueline FDirectorSale340$213.77$72.7KForm 4
Mar 6, 2026Taranto Eric RobertEVP & GM, VSDSale4,568$220.52$1.0MForm 4

All 83 trades can be filtered by person here when JavaScript is on.

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

Executive pay

What the company paid its top executives, from the summary compensation table in its proxy statement. Total pay includes salary, bonus, stock and option awards and other pay, as the company valued them.

YearExecutiveAgeSalaryTotal pay
2025President and CEO(principal executive officer)$1.0M$13.0M81
2025EVP and CFO(principal financial officer)$625.0K$3.3M81
2025EVP and COO$541.4K$2.9M81
2025EVP, General Counseland Secretary$542.5K$2.8M81
2025EVPGlobal Strategic Marketing, and General Manager, MSD$525.8K$2.4M81
2024President and CEO(principal executive officer)$970.5K$8.8M81
2024EVP and CFO(principal financial officer)$134.9K$2.9M81
2024EVP and COO$477.9K$2.7M81
2024EVP, General Counseland Secretary$510.1K$1.9M81
2024EVPGlobal Strategic Marketing, and General Manager, MSD$455.7K$1.6M81
2023President and CEO(principal executive officer)$950.0K$7.9M81
2023EVP and COO$465.7K$2.0M81
2023EVP, General Counseland Secretary$504.0K$1.9M81
2023EVPGlobal Strategic Marketing, and General Manager, MSD$450.0K$1.5M81

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 100. Change is in shares since the quarter before.

FundSharesValueShare of the fundChange
BlackRock, Inc.6,930,030$3.1B0.0%+288,300
Invesco Ltd.4,661,664$2.1B0.2%+940,205
Vanguard Portfolio Management LLC3,707,327$1.6B0.1%+21,834
Jpmorgan Chase & Co3,373,844$1.4B0.1%+1,277,502
Vanguard Capital Management LLC3,049,560$1.4B0.0%+35,359
State Street Corp2,134,663$949.4M0.0%+76,931
Point72 Asset Management, L.P.1,996,843$888.2M1.4%+386,512
Capital International Investors1,915,187$851.9M0.2%−53,583
Geode Capital Management, LLC1,539,072$686.6M0.0%−247
Fmr LLC1,499,498$667.0M0.0%−434,345
Wellington Management Group Llp1,416,034$629.9M0.1%−417,103
Capital World Investors1,366,290$607.7M0.1%+89,090
Whale Rock Capital Management LLC1,271,373$565.5M4.5%−35,351
Neuberger Berman Group LLC1,165,068$518.2M0.3%−268,461
Alkeon Capital Management LLC1,072,040$476.8M1.8%New
Norges Bank954,667$424.6M0.0%New
Westfield Capital Management Co LP928,617$413.0M1.3%−118,146
Sachem Head Capital Management LP812,700$361.5M7.5%New
Charles Schwab Investment Management Inc808,198$359.5M0.0%−58,449
Citadel Advisors LLC697,670$310.3M0.2%−249,362
Morgan Stanley681,576$303.2M0.0%+166,513
Bank of New York Mellon Corp658,544$292.9M0.0%−173,606
Millennium Management LLC645,071$286.9M0.2%−249,298
Aqr Capital Management LLC638,333$280.2M0.1%+21,836
Victory Capital Management Inc609,027$270.9M0.2%−269,731

13F reports cover disclosed long positions in U.S. stocks only.

Members of Congress who traded it

6 trades disclosed by members of Congress. “Vs S&P since” is the stock’s change since the trade minus the S&P 500’s.

DateMemberTradeAmountVs S&P sinceFiling
Oct 31, 2025Lisa C. McClainRepublican, HouseSale$1,001 - $15,000−45.9%Report
Oct 30, 2025Lisa C. McClainRepublican, HouseBuy$1,001 - $15,000+50.5%Report
Oct 30, 2025Lisa C. McClainRepublican, HouseSale$1,001 - $15,000−50.5%Report
Aug 4, 2025Lisa C. McClainRepublican, HouseBuy$1,001 - $15,000+120.8%Report
Apr 3, 2023Tommy TubervilleRepublican, SenateSale$1,001 - $15,000−74.3%Report
Mar 30, 2022Tommy TubervilleRepublican, SenateBuy$1,001 - $15,000−22.2%Report

Members report amounts as ranges, not exact figures. Returns are price-only (no dividends).

SEC filer profile

How MKS INC is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARMKS INC1
  • CIK0001049502
  • Employer ID (EIN)04-22775126
  • Filer statusLarge accelerated filer not an emerging growth company; not a smaller reporting company; not a shell company6
  • Incorporated inMassachusetts6
  • Fiscal year endsDecember 311
  • Industry code (SIC)3823 Industrial Instruments For Measurement, Display, and Control1
  • SEC reviewing officeOffice of Industrial Applications and Services, Division of Corporation Finance1
  • Business address2 Tech Drive, Andover, MA 018101
  • Phone978-645-55001
  • Shares outstanding67,617,558 as of Jul 28, 202613
  • Public float$6.7B as of Jun 30, 20256
  • AuditorPricewaterhouseCoopers LLP, Boston, Massachusetts PCAOB ID 238; it also attests to the company’s internal control over financial reporting6
  • On EDGAR sinceNov 14, 19971
  • Filings2,476 in all: 4 (1,596), 8-K (231), SC 13G/A (104), 10-Q (83), 144 (76), 4/A (37), 3 (35), 5 (29)1
    All 50 form types

    DEF 14A (27), 10-K (26), CT ORDER (22), SC 13G (22), S-8 (20), DEFA14A (15), SC 13D/A (15), ARS (14), SD (13), UPLOAD (13), SCHEDULE 13G/A (11), CORRESP (10), 425 (8), 8-K/A (7), DFAN14A (7), PRE 14A (5), S-1/A (5), SC TO-I/A (5), SCHEDULE 13G (5), 5/A (4), 3/A (2), 424B5 (2), 424B7 (2), 8-A12G (2), REGDEX (2), RW (2), S-1 (2), S-3 (2), SC 13D (2), 10-K405 (1), 424B1 (1), DEFM14A (1), EFFECT (1), NT 10-K (1), POS AM (1), PREM14A (1), REGDEX/A (1), S-3/A (1), S-3ASR (1), S-4 (1), S-4/A (1), SC TO-I (1)

  • Latest filingsAnnual report (10-K) Feb 24, 2026
    Quarterly report (10-Q) Aug 6, 2026
    Proxy statement (DEF 14A) Mar 31, 2026
    Latest 8-K (8-K) Aug 5, 2026

Securities registered for trading

ClassSymbolExchange
Common StockMKSINasdaq Global Select Market

From the cover page of the 10-K filed Feb 24, 2026 (Section 12(b) of the Exchange Act).6

Risk factors and legal proceedings

The risks MKS INC names in Item 1A of its 10-K filed Feb 24, 2026: 33 risks under these headings, as written.6

  • Strategic Transaction Risks
  • As part of our business strategy, we have consummated and may continue to pursue acquisitions and other strategic transactions, which may be challenging and costly to identify and complete, disruptive to our business and our management, and/or dilutive to stockholder value.
  • Financial Risks
  • Our substantial consolidated indebtedness could adversely affect us, including by increasing our interest expense and decreasing our business flexibility.
  • The terms of our Term Loan Facility, Revolving Facility and 2034 Notes impose significant financial obligations and risks upon us, limit our ability to take certain actions, and could discourage a change in control.
  • A material amount of our assets represents goodwill and intangible assets, against which we have recorded impairments in the past, and our net income may be significantly reduced by future impairments of these assets.
  • Risks Related to Cybersecurity, Data Privacy and Intellectual Property Protection
  • We are exposed to risks related to cybersecurity and data privacy threats and incidents, such as the ransomware event we identified in February 2023, and we are subject to restrictions and changes in laws and regulations governing data privacy and data protection, any of which could have a material adverse effect on our business.
  • Our proprietary technology is important to the continued success of our business. Our failure to protect this proprietary technology may significantly impair our competitive position.
  • Risks Related to Our Operations
  • Supply chain disruptions and other manufacturing interruptions or delays have affected our ability to meet customer demand and have led to higher costs, while the failure to estimate customer demand accurately has resulted in excess or obsolete inventory, all of which has negatively impacted, and could in the future negatively impact, our business.
  • Our dependence on sole and limited source suppliers and international suppliers has negatively impacted, and could continue to impact, our ability to manufacture products and systems.
The other 25 risks
  • Our failure to successfully manage the transition of certain of our products to other manufacturing locations, the transition of certain of our products to or from contract manufacturers, and the transition of certain functions to centralized locations would likely harm our business, financial condition and operating results.
  • Our products could contain defects, which would increase our costs and seriously harm our business, financial condition, operating results and customer relationships.
  • Chemical manufacturing is inherently hazardous and could result in accidents that disrupt our operations or expose us to significant losses or liabilities.
  • We outsource a number of services to third-party service providers, which decreases our control over the performance of these functions. Disruptions or delays at our third-party service providers could adversely impact our operations.
  • The loss of net revenues from any of our major customers would likely have a material adverse effect on us.
  • Key personnel have been, and may continue to be, difficult to attract and retain.
  • Emerging issues related to the development, deployment, and use of AI, including generative AI, in our business could give rise to competitive disadvantages, reputational harm, legal or regulatory action, or other adverse impacts on our business.
  • Risks Related to Our Industries and Markets
  • The semiconductor, electronics manufacturing and automotive industries we serve are characterized by periodic fluctuations in business activity that may cause a reduction in demand for our products.
  • Many of the markets and industries we serve are highly competitive, are subject to rapid technological advancement, and have narrow design windows, and if we fail to introduce new and innovative products or improve our existing products, or if our products or the applications we invest in do not achieve widespread adoption, our business, financial condition and operating results will be harmed.
  • We offer products for multiple markets and must face the challenges of supporting the distinct needs of each of the markets we serve.
  • Risks Related to Operating a Global Business
  • We face significant risks associated with doing business internationally.
  • We face significant risks associated with doing business in China in particular.
  • Unfavorable currency exchange rate fluctuations may lead to lower operating results or may cause us to change customer pricing, which could result in reduced sales and losses.
  • Legal, Tax, Regulatory and Compliance Risks
  • We are obligated to develop and maintain proper and effective internal control over financial reporting, and we previously identified a material weakness in our internal control over financial reporting and may discover additional material weaknesses
  • in the future. Any failure to maintain the adequacy of this internal control may adversely affect our operating results, our stock price and investor confidence in our Company.
  • If significant trade restrictions or tariffs on our products or components that are imported from or exported to certain countries, including, but not limited to, China, are initiated, continue or are expanded, our business, financial condition and operating results may be materially harmed.
  • We are subject to international trade compliance regulations, and violations of those regulations could result in fines or trade restrictions, which could have a material adverse effect on us.
  • Changes in tax rates or tax regulation or the termination of tax incentives could affect our operating results.
  • Many of our products and customers are subject to numerous laws regulating the production and use of chemical substances, and some of our products may need to be reformulated or discontinued to comply with these laws and regulations.
  • We are subject to environmental regulations. If we fail to comply with these regulations, our business could be harmed.
  • We are exposed to various risks related to legal proceedings, including, for example, product liability claims, intellectual property infringement claims, regulatory claims, contractual claims and class action litigation, which if successful, could have a material adverse effect on our commercial relationships, business, financial condition and operating results.
  • Risks Related to Owning Our Common Stock
  • Our quarterly operating results have fluctuated, and are likely to continue to vary significantly, which may result in volatility in the market price of our common stock.
  • The market price of our common stock has fluctuated and may continue to fluctuate for reasons over which we have no control.
  • We may not pay dividends on our common stock.
  • Some provisions of our Restated Articles of Organization, our Second Amended and Restated By-laws, as amended, and Massachusetts law could discourage potential acquisition proposals and could delay, deter or prevent a change in control.

Legal proceedings

We are subject to various legal proceedings and claims, which have arisen in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on our results of operations, financial condition or cash flows.

The opening of Item 3, Legal Proceedings.6

Sources

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