MKSI

SEC EDGAR filings — 10-K/Q, 8-K, Form 4 insider transactions, offerings, ownership reports.

80 filings

8-K
8-K
mksi-20260331.htm· Items: 5.02
2026-04-06
9d ago
140 KB ↗
ARS
ARS
d101621dars.pdf
2026-03-31
15d ago
1.6 MB ↗
DEFA14A
DEFA14A
mksi-defa14a-naa_card.htm
2026-03-31
15d ago
577 KB ↗
DEF 14A
DEF 14A
mksi-20260331.htm
2026-03-31
15d ago
25.9 MB ↗
SCHEDULE 13G/A
SCHEDULE 13G/A
xslSCHEDULE_13G_X02/primary_doc.xml
2026-03-27
19d ago
7 KB ↗
PRE 14A
PRE 14A
mksi-20260320.htm
2026-03-20
26d ago
26.1 MB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-03-13
1mo ago
5 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-03-12
1mo ago
5 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-03-09
1mo ago
5 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-03-06
1mo ago
7 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-03-03
1mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-03-02
1mo ago
5 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-25
1mo ago
4 KB ↗
10-K
10-K
mksi-20251231.htm
2026-02-24
1mo ago
27.2 MB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-24
1mo ago
7 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-24
1mo ago
4 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-23
1mo ago
5 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-23
1mo ago
4 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-23
1mo ago
4 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-23
1mo ago
7 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-23
1mo ago
4 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-23
1mo ago
5 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-23
1mo ago
4 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-23
1mo ago
10 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
7 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
5 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
6 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2026-02-20
1mo ago
4 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-18
1mo ago
30 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-18
1mo ago
30 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-18
1mo ago
30 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-18
1mo ago
22 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-18
1mo ago
15 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-18
1mo ago
30 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-18
1mo ago
30 KB ↗
8-K
8-K
mksi-20260217.htm· Items: 2.02,9.01
2026-02-17
1mo ago
1.2 MB ↗
SCHEDULE 13G/A
SCHEDULE 13G/A
xslSCHEDULE_13G_X01/primary_doc.xml
2026-02-17
1mo ago
8 KB ↗
SCHEDULE 13G
SCHEDULE 13G
xslSCHEDULE_13G_X01/primary_doc.xml
2026-02-12
2mo ago
13 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-09
2mo ago
6 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-09
2mo ago
6 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-09
2mo ago
6 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-09
2mo ago
6 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-09
2mo ago
6 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-09
2mo ago
6 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2026-02-09
2mo ago
6 KB ↗
8-K
8-K
d39268d8k.htm· Items: 1.01,2.03,7.01,9.01
2026-02-05
2mo ago
3.5 MB ↗
8-K
8-K
d85940d8k.htm· Items: 8.01,9.01
2026-01-28
2mo ago
212 KB ↗
8-K
8-K
d61981d8k.htm· Items: 2.02,7.01,9.01
2026-01-21
2mo ago
24.5 MB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-12-03
4mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2025-12-02
4mo ago
5 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-11-18
4mo ago
9 KB ↗
10-Q
10-Q
mksi-20250930.htm
2025-11-06
5mo ago
17.2 MB ↗
8-K
8-K
mksi-20251105.htm· Items: 2.02,9.01
2025-11-05
5mo ago
1.6 MB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-11-04
5mo ago
22 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-11-04
5mo ago
12 KB ↗
SCHEDULE 13G/A
SCHEDULE 13G/A
xslSCHEDULE_13G_X01/primary_doc.xml
2025-10-31
5mo ago
6 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-10-23
5mo ago
5 KB ↗
144
144
xsl144X01/primary_doc.xml
2025-10-22
5mo ago
5 KB ↗
SCHEDULE 13G/A
SCHEDULE 13G/A
xslSCHEDULE_13G_X01/primary_doc.xml
2025-10-17
6mo ago
11 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-10-02
6mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2025-10-01
6mo ago
5 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-09-19
6mo ago
5 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-09-19
6mo ago
5 KB ↗
144
144
xsl144X01/primary_doc.xml
2025-09-18
6mo ago
7 KB ↗
144
144
xsl144X01/primary_doc.xml
2025-09-18
6mo ago
6 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-09-03
7mo ago
4 KB ↗
144
144
xsl144X01/primary_doc.xml
2025-09-02
7mo ago
5 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-08-19
7mo ago
9 KB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-08-18
8mo ago
9 KB ↗
SCHEDULE 13G/A
SCHEDULE 13G/A
xslSCHEDULE_13G_X01/primary_doc.xml
2025-08-14
8mo ago
8 KB ↗
SCHEDULE 13G/A
SCHEDULE 13G/A
xslSCHEDULE_13G_X01/primary_doc.xml
2025-08-08
8mo ago
8 KB ↗
SCHEDULE 13G
SCHEDULE 13G
xslSCHEDULE_13G_X01/primary_doc.xml
2025-08-08
8mo ago
8 KB ↗
10-Q
10-Q
mksi-20250630.htm
2025-08-07
8mo ago
18.1 MB ↗
8-K
8-K
mksi-20250806.htm· Items: 2.02,9.01
2025-08-06
8mo ago
1.5 MB ↗
4
PRIMARY DOCUMENT
xslF345X05/form4.xml
2025-08-05
8mo ago
5 KB ↗

Filings sourced directly from SEC EDGAR. Click any row to open the original document on sec.gov.

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