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MKS (MKSI) 10K Form and Latest SEC Filings 2026

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$313.81 -3.50 (-1.10%)
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Latest MKS SEC Filings & Recent Activity

MKS (NASDAQ:MKSI) has submitted 559+ documents to the U.S. Securities and Exchange Commission (SEC) since 2017. For investors, these filings are the primary source of verified financial data — covering everything from annual revenue and debt levels in the 10-K, to material business events in 8-K current reports, to insider buying and selling activity in Form 4 disclosures. Key figures from these filings, including revenue, earnings, and cash flow, are summarized in MKS's financial statements. The most recent filing was a Form 144 submitted on May 14, 2026.

Form 4
MKS INC Reports Ownership Change on May. 14, 2026

Form 4 filings disclose changes in stock ownership by company insiders, including purchases, sales, grants, and option exercises.

View insider ownership

8-K
MKS Files Current Report on May. 6, 2026

An 8-K is filed when a material corporate event occurs, such as an acquisition, leadership change, or financial update.

View filing

10-Q
MKS Files Quarterly Report on May. 7, 2026

The 10-Q contains MKS's unaudited quarterly financial statements, revenue, earnings updates, and cash flow changes between annual reports.

View earnings history

MKS SEC Filing History

Browse MKS's complete SEC filing history using the filters below. Filter by form type - 10-K, 10-Q, 8-K, Form 4, and more - or set a custom date range to find a filing.

DateFilerForm TypeView
05/14/2026 2:44 PM
MKS (1049502) Subject
Moloney Jacqueline F (1501968) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
05/14/2026 10:12 AM
MKS (1049502) Issuer
Moloney Jacqueline F (1501968) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/13/2026 9:31 AM
MKS (1049502) Subject
Moloney Jacqueline F (1501968) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
05/12/2026 2:09 PM
Burke Kathleen Flaherty (1775435) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2026 2:13 PM
MKS (1049502) Issuer
Mora Elizabeth (1548935) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2026 2:15 PM
JABRE WISSAM G (1903967) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2026 2:17 PM
MKS (1049502) Issuer
Moloney Jacqueline F (1501968) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2026 2:19 PM
MKS (1049502) Issuer
Taranto Eric Robert (1842235) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2026 1:59 PM
COLELLA GERALD G (1256715) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2026 2:02 PM
Batra Raj (1754514) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2026 2:04 PM
CANNONE PETER III (1276985) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/12/2026 2:07 PM
Donahue Joseph B (1413323) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
05/11/2026 3:02 PM
MKS (1049502) Subject
Taranto Eric Robert (1842235) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
05/11/2026 12:21 PM
Burke Kathleen Flaherty (1775435) Reporting
MKS (1049502) Subject
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
05/11/2026 10:03 AM
MKS (1049502) Filer
Form S-8
Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans  
05/07/2026 2:30 PM
MKS (1049502) Filer
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
05/06/2026 3:31 PM
MKS (1049502) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/06/2026 10:30 AM
FMR LLC (315066) Filed by
MKS (1049502) Subject
Form SCHEDULE 13G/A
04/30/2026 10:43 AM
MKS (1049502) Subject
VANGUARD CAPITAL MANAGEMENT LLC (2100119) Filed by
Form SCHEDULE 13G
04/29/2026 1:08 PM
MKS (1049502) Subject
VANGUARD PORTFOLIO MANAGEMENT LLC (2100121) Filed by
Form SCHEDULE 13G
04/20/2026 10:31 AM
MKS (1049502) Issuer
Williams John Edward (1710173) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/16/2026 2:29 PM
McCarthy Michelle M (1732461) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/06/2026 7:29 AM
MKS (1049502) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/31/2026 7:54 AM
MKS (1049502) Filer
Form ARS
03/31/2026 7:34 AM
MKS (1049502) Filer
Form DEF 14A
03/31/2026 7:37 AM
MKS (1049502) Filer
Form DEFA14A
03/27/2026 9:49 AM
MKS (1049502) Subject
VANGUARD GROUP INC (102909) Filed by
Form SCHEDULE 13G/A
03/20/2026 3:05 PM
MKS (1049502) Filer
Form PRE 14A
03/13/2026 9:19 AM
MKS (1049502) Issuer
Moloney Jacqueline F (1501968) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
03/12/2026 1:31 PM
MKS (1049502) Subject
Moloney Jacqueline F (1501968) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
03/09/2026 11:01 AM
MKS (1049502) Issuer
Taranto Eric Robert (1842235) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
03/06/2026 12:09 PM
MKS (1049502) Subject
Taranto Eric Robert (1842235) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
03/03/2026 11:18 AM
MKS (1049502) Issuer
Mora Elizabeth (1548935) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
03/02/2026 11:07 AM
MKS (1049502) Subject
Mora Elizabeth (1548935) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/25/2026 10:50 AM
MKS (1049502) Issuer
Schreiner James Alan (1797189) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2026 2:31 PM
MKS (1049502) Filer
Form 10-K
Annual report pursuant to Section 13 or 15(d)  
02/24/2026 1:26 PM
COLELLA GERALD G (1256715) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/24/2026 9:32 AM
MKS (1049502) Subject
Schreiner James Alan (1797189) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/23/2026 1:48 PM
CANNONE PETER III (1276985) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/23/2026 1:28 PM
Burke Kathleen Flaherty (1775435) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/23/2026 1:30 PM
MKS (1049502) Issuer
Williams John Edward (1710173) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
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02/23/2026 1:32 PM
MKS (1049502) Issuer
Moloney Jacqueline F (1501968) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/23/2026 1:36 PM
McCarthy Michelle M (1732461) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/23/2026 1:38 PM
Henry David Philip (1842459) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/23/2026 1:39 PM
MKS (1049502) Issuer
Taranto Eric Robert (1842235) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/23/2026 1:25 PM
Lee John Tseng-Chung (1414656) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/20/2026 1:59 PM
Henry David Philip (1842459) Reporting
MKS (1049502) Subject
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/20/2026 12:53 PM
CANNONE PETER III (1276985) Reporting
MKS (1049502) Subject
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/20/2026 11:09 AM
Lee John Tseng-Chung (1414656) Reporting
MKS (1049502) Subject
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/20/2026 10:03 AM
Burke Kathleen Flaherty (1775435) Reporting
MKS (1049502) Subject
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/20/2026 10:06 AM
McCarthy Michelle M (1732461) Reporting
MKS (1049502) Subject
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/20/2026 10:08 AM
MKS (1049502) Subject
Taranto Eric Robert (1842235) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/20/2026 10:23 AM
MKS (1049502) Subject
Williams John Edward (1710173) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/20/2026 9:55 AM
MKS (1049502) Subject
Moloney Jacqueline F (1501968) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/18/2026 4:07 PM
MKS (1049502) Issuer
Taranto Eric Robert (1842235) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/17/2026 9:26 AM
MKS (1049502) Subject
PRICE T ROWE ASSOCIATES INC /MD/ (80255) Filed by
Form SCHEDULE 13G/A
02/09/2026 12:51 PM
Lee John Tseng-Chung (1414656) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/09/2026 12:54 PM
Mayampurath Ramakumar (1859332) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/09/2026 12:56 PM
Burke Kathleen Flaherty (1775435) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/09/2026 1:00 PM
MKS (1049502) Issuer
Williams John Edward (1710173) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/09/2026 1:03 PM
MKS (1049502) Issuer
Schreiner James Alan (1797189) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/09/2026 1:06 PM
Henry David Philip (1842459) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
02/09/2026 1:08 PM
MKS (1049502) Issuer
Taranto Eric Robert (1842235) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
02/05/2026 7:39 AM
MKS (1049502) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/21/2026 9:30 AM
MKS (1049502) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
12/03/2025 10:39 AM
MKS (1049502) Issuer
Mora Elizabeth (1548935) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
12/02/2025 9:05 AM
MKS (1049502) Subject
Mora Elizabeth (1548935) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/18/2025 1:32 PM
Mayampurath Ramakumar (1859332) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
11/06/2025 1:01 PM
MKS (1049502) Filer
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
11/05/2025 3:31 PM
MKS (1049502) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
11/04/2025 4:01 PM
Burke Kathleen Flaherty (1775435) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/31/2025 10:05 AM
MKS (1049502) Subject
VANGUARD GROUP INC (102909) Filed by
Form SCHEDULE 13G/A
10/23/2025 1:43 PM
MKS (1049502) Issuer
Schreiner James Alan (1797189) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
10/22/2025 8:37 AM
MKS (1049502) Subject
Schreiner James Alan (1797189) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
10/17/2025 5:13 PM
BlackRock, Inc. (2012383) Filed by
MKS (1049502) Subject
Form SCHEDULE 13G/A
10/02/2025 1:00 PM
MKS (1049502) Issuer
Moloney Jacqueline F (1501968) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
10/01/2025 8:48 AM
MKS (1049502) Subject
Moloney Jacqueline F (1501968) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
09/19/2025 1:18 PM
Henry David Philip (1842459) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
09/19/2025 1:21 PM
MKS (1049502) Issuer
Schreiner James Alan (1797189) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
09/18/2025 11:54 AM
Henry David Philip (1842459) Reporting
MKS (1049502) Subject
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
09/18/2025 9:02 AM
MKS (1049502) Subject
Schreiner James Alan (1797189) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
09/03/2025 12:40 PM
MKS (1049502) Issuer
Mora Elizabeth (1548935) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
09/02/2025 11:10 AM
MKS (1049502) Subject
Mora Elizabeth (1548935) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
08/19/2025 12:05 PM
MKS (1049502) Issuer
Schreiner James Alan (1797189) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
08/18/2025 12:49 PM
MKS (1049502) Issuer
Williams John Edward (1710173) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
08/08/2025 11:29 AM
MKS (1049502) Subject
VICTORY CAPITAL MANAGEMENT INC (1040188) Filed by
Form SCHEDULE 13G/A
08/08/2025 8:53 AM
MKS (1049502) Subject
VICTORY CAPITAL MANAGEMENT INC (1040188) Filed by
Form SCHEDULE 13G
08/07/2025 8:45 AM
MKS (1049502) Filer
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
08/06/2025 3:31 PM
MKS (1049502) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/04/2025 10:30 AM
MKS (1049502) Issuer
Moloney Jacqueline F (1501968) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
08/01/2025 9:56 AM
MKS (1049502) Subject
Moloney Jacqueline F (1501968) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
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07/08/2025 3:45 PM
MKS (1049502) Issuer
Schreiner James Alan (1797189) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
07/07/2025 3:07 PM
Henry David Philip (1842459) Reporting
MKS (1049502) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
07/07/2025 12:31 PM
MKS (1049502) Subject
Schreiner James Alan (1797189) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
07/03/2025 9:32 AM
Henry David Philip (1842459) Reporting
MKS (1049502) Subject
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
06/03/2025 1:53 PM
MKS (1049502) Issuer
Mora Elizabeth (1548935) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
06/02/2025 10:19 AM
MKS (1049502) Subject
Mora Elizabeth (1548935) Reporting
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
05/29/2025 3:12 PM
MKS (1049502) Filer
Form SD
Specialized Disclosure Report  
(Data available from 1/1/2016 forward)

MKS SEC Filings - Frequently Asked Questions

MKS (MKSI) has submitted 559+ filings to the SEC since 2017. You can browse the complete history or filter by form type using the tools above.

MKS's fiscal year ends on December 31. The company typically files its 10-K annual report by the end of February, covering the prior fiscal year's financial results. Key financial data from these reports is available on MKS's financial statements page.

The most recent filing was a Form 144 submitted on May 14, 2026. View the full filing using the link above.

SEC Filing Types: 10-K, 10-Q, 8-K and More

SEC filings are legally required disclosures that public companies submit to the U.S. Securities and Exchange Commission. Unlike press releases or earnings call transcripts, these documents are filed under legal obligation — meaning the financial data they contain is audited, standardized, and subject to penalties if materially false. For investors, that makes SEC filings the most reliable primary source available for evaluating a company's true financial position.

Yes. All SEC filings are publicly available through the SEC's EDGAR database and on financial research platforms like MarketBeat. Companies are required by law to make these disclosures accessible to all investors — meaning retail investors have access to the same source documents as institutional analysts.

A 10-K is an annual report containing audited financial statements and a full review of the company's business — it is the most comprehensive filing a company makes each year. A 10-Q is a shorter, unaudited quarterly update filed three times per year between annual reports. Investors typically use the 10-K for deep fundamental analysis and the 10-Q to track whether the company is on pace with its guidance mid-year.

The most important filing for fundamental investors. Filed once per year, the 10-K contains audited financial statements, revenue and earnings trends, debt obligations, risk factors, and management's own assessment of the business. Reading the risk factors section and comparing year-over-year financials can reveal issues that don't show up in analyst summaries.

An unaudited financial update filed three times per year (the 10-K covers Q4). Investors use 10-Qs to track whether guidance is on pace, monitor changes in cash flow or inventory, and catch any mid-year shifts in business conditions before they become headline news.

Filed within four business days of a material event — earnings releases, merger announcements, executive departures, or major asset sales. Because 8-Ks are filed before media coverage catches up, they are often the fastest way to get unfiltered information directly from the company on market-moving events.

Filed within two business days whenever an executive or director buys or sells company stock. Insider purchases — especially large or clustered buys — are often interpreted as a signal of management confidence. Insider selling is more ambiguous but worth monitoring for patterns, particularly around lock-up expirations or ahead of major announcements.


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This page (NASDAQ:MKSI) was last updated on 5/14/2026 by MarketBeat.com Staff.
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