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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Sep 1, 2026Reported sale · Form 4Elizabeth Mora · $75.3KOpen the filing ↗
- Sep 1, 2026Notice of sale · Form 144Mora Elizabeth · Director · $75.3KOpen the filing ↗
- Aug 14, 2026Reported sale · Form 4John Tseng-Chung Lee, President & CEO · $3.0MOpen the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record2,33017 flagged findings
Reported transactions (Form 4)80since Feb 17, 2026 · and 4 other holdings
Corporate events (8-K)30since Aug 17, 2022
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
What the company does
MKS Inc. is a technology company that supplies instruments, subsystems, systems, process control technologies, and specialty chemical products used in manufacturing semiconductor chips, printed circuit board, advanced packaging (semiconductor), and specialty industrial applications. The company also provides chemicals and equipment used for creating decorative and functional surface finishes. The company is headquartered in Andover, Massachusetts, with offices and facilities worldwide.
Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-05-07share offering or dilution eventrecentOpen filing ↗“…2026 December 31, 2025 Short-term debt: Term Loan Facility $ 19 $ 51 Convertible Notes 1,400 — Debt issuance costs - Convertible…”
+1 more passage from the same document
- “…Facility $ 19 $ 51 Convertible Notes 1,400 — Debt issuance costs - Convertible Notes ( 21 ) — Convertible Notes, net 1,379 — Total…”
- 2026-05-07capital return (buybacks/dividends)recentOpen filing ↗“…included in the Company’s condensed consolidated statements of operations and comprehensive income (loss) was as follows: Three…”
+1 more passage from the same document
- “…income (loss) was as follows: Three Months Ended March 31, 2026 2025 Cost of revenues $ 1 $ 1 Research and development expense…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
The 25 most recent filings (of 2,330)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Sep 3, 26SCHEDULE 13G/A ↗Passive stake · JPMORGAN CHASE & CO. · 2.9% · event on Aug 31, 26 · amendment
- Sep 2, 26Form 4 ↗Insider transaction
- Sep 1, 26Form 144 ↗Notice of proposed sale
- Aug 14, 26Form 144 ↗Notice of proposed sale
- Aug 6, 2610-Q ↗Quarterly report
- Aug 5, 268-K ↗Current report · Results
- Aug 4, 26Form 4 ↗Insider transaction
- Aug 3, 26Form 144 ↗Notice of proposed sale
- Jul 24, 26SCHEDULE 13G/A ↗Passive stake · Victory Capital Management, Inc. · 0.9% · event on Jun 30, 26 · amendment
- Jul 16, 26SCHEDULE 13G ↗Passive stake · JPMORGAN CHASE & CO · 5.0% · event on Jun 30, 26
- Jun 16, 26Form 4 ↗Insider transaction
- Jun 12, 26Form 144 ↗Notice of proposed sale
- Jun 11, 26Form 4 ↗Insider transaction
- Jun 10, 26Form 144 ↗Notice of proposed sale
- Jun 8, 26Form 4 ↗Insider transaction
- Jun 5, 26Form 144 ↗Notice of proposed sale
- Jun 4, 26Form 3 ↗Insider transaction
Notice of proposed sale · 2 Form 144 filingsshow all 2hide
- Jun 1, 26Form 144 ↗Notice of proposed sale
- Jun 1, 26Form 144 ↗Notice of proposed sale
2,330 filings on record, the oldest from May 17, 99.
Listing the 25 most recent filings of the 2,330 on record.
26048
- May 12, 26A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Apr 6, 26A senior executive left or was appointed8-K 5.02 ↗
- Feb 5, 26Entered a material agreement+3 more in the same filing8-K 1.01 ↗
- May 15, 25A senior executive left or was appointed+5 more in the same filing8-K 5.02 ↗
- Jan 24, 25Entered a material agreement+3 more in the same filing8-K 1.01 ↗
- Nov 5, 24A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Aug 13, 24A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Jul 23, 24Entered a material agreement+3 more in the same filing8-K 1.01 ↗
- May 16, 24Entered a material agreement+3 more in the same filing8-K 1.01 ↗
- May 8, 24A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Apr 1, 24A senior executive left or was appointed8-K 5.02 ↗
- Feb 14, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
6 older filings not shown · The record reaches back to Jan 27, 05.
Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.
- Apr 3, 09Restructuring plan with committed costs+2 more in the same filing8-K 2.05 ↗
- Jan 29, 09Restructuring plan with committed costs8-K 2.05 ↗
The full record holds 2 stress filings.
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- The Vanguard Group11.5%Sep 30, 25SCHEDULE 13G/A ↗
- BlackRock, Inc.8.8%Sep 30, 25SCHEDULE 13G/A ↗
- Invesco Ltd.6.5%Dec 31, 25SCHEDULE 13G ↗
- Vanguard Portfolio Management5.5%Mar 31, 26SCHEDULE 13G ↗
- Vanguard Capital Management5.2%Mar 31, 26SCHEDULE 13G ↗
show 4 more holdershide
- T. Rowe Price Associates, Inc.4.1%Dec 31, 25SCHEDULE 13G/A ↗2 earlier filings
- FMR LLC3.3%Mar 31, 26SCHEDULE 13G/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum.
- JPMORGAN CHASE & CO.2.9%Aug 31, 26SCHEDULE 13G/A ↗1 earlier filing
- Victory Capital Management, Inc.0.9%Jun 30, 26SCHEDULE 13G/A ↗2 earlier filings
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Sep 1, Mora Elizabeth filed notice of intent to sell up to $75K. It is filed under a scheduled plan (10b5-1), arranged in advance.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
After the notice, they sold $75K on Sep 1, per their Form 4. That is 100% of the shares announced so far, and the window is still open.
View notice (Form 144) ↗+2 more recent notices · 2 with a later sale
- Sep 1, 26Sell$75KElizabeth Mora↗
- Aug 14, 26Sell$3.0MJohn Tseng-Chung LeePresident & CEO↗
- Aug 3, 26Sell$132KJohn Edward WilliamsEVP & GM, PSD↗
- Jun 12, 26Sell$854KJames Alan SchreinerEVP & COO↗
- Jun 12, 26Sell$281KJames Alan SchreinerEVP & COO↗
- Jun 12, 26Sell$75KJames Alan SchreinerEVP & COO↗
- Jun 10, 26Sell$248KJames Alan SchreinerEVP & COO↗
- Jun 5, 26Sell$767KMichelle M McCarthySVP & Chief Accounting Officer↗
- Jun 1, 26Sell$95KElizabeth Mora↗
- Jun 1, 26Sell$1.9MDavid Philip HenryEVP, Global Str Mktg & GM, MSD↗
- May 27, 26Sell$153KGERALD G COLELLA↗
- May 27, 26Sell$2.7MGERALD G COLELLA↗
There are 15 more transactions in this stretch.
Stock compensation, tax and giftsshow the 13 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- May 11, 26Compensationamount n/aGERALD G COLELLA↗
- May 11, 26Compensationamount n/aRaj Batra↗
- May 11, 26Compensationamount n/aPETER CANNONE III↗
- May 11, 26Compensationamount n/aJoseph B Donahue↗
- May 11, 26Compensationamount n/aElizabeth Mora↗
- May 11, 26Compensationamount n/aWISSAM G JABRE↗
- May 11, 26Compensationamount n/aJacqueline F Moloney↗
- Apr 17, 26Compensationamount n/aJohn Edward WilliamsEVP & GM, PSD↗
- Apr 17, 26Tax$223KJohn Edward WilliamsEVP & GM, PSD↗
- Apr 15, 26Compensationamount n/aMichelle M McCarthySVP & Chief Accounting Officer↗
- Apr 15, 26Compensationamount n/aMichelle M McCarthySVP & Chief Accounting Officer↗
- Apr 15, 26Compensationamount n/aMichelle M McCarthySVP & Chief Accounting Officer↗
- Apr 15, 26Tax$377KMichelle M McCarthySVP & Chief Accounting Officer↗
The full record holds 342 transactions and goes back to Feb 8, 23.
Its sector and its market
MKS Inc. among Information Technology companies
The profile shows what is on record. Context and Radar place the company among those of its sector and region.
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Coverage
What sits behind this page.
Where each figure comes from and how far it reaches.
- Prices
- End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
- Series quality
- 250 clean closes in the period.
- SEC records
- 2,330 documents on file, from May 17, 1999 to Sep 3, 2026.
- Company description
- Wikipedia, read on Sep 3, 2026.
- This page
- Generated on Oct 19, 2026; refreshed through the day.
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No. It is one close per session, from the provider and with the date shown on the profile; it does not update during the trading day.
Which SEC documents appear here?
Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.
Why does a European company show no SEC records?
It depends on the company: some European issuers file a 20-F or 6-K with the SEC and others don't. The profile shows whatever is on record; when there is nothing, it says so rather than guessing why. Europe does not yet have a common filing archive like EDGAR in the United States. The EU will open its own, ESAP, in July 2027 (managers' transactions arrive in January 2028), and we plan to add it once it is available.
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