Date ?
15 Apr 2026
Insider ?
TSAI, CHUN-HSIEN Director, CEO, PRESIDENT, CHAIRMAN
Side ?
Disposal
Shares ?
300000
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
TSAI, CHUN-JUNG Director
Side ?
Disposal
Shares ?
330000
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
TSAI, CHUN-JUNG Director
Side ?
Acquisition
Shares ?
330000
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Symbol ?
MKSI MKS Instruments Inc
Insider ?
MCCARTHY, MICHELLE M SVP & Chief Accounting Officer
Side ?
Disposal
Shares ?
1107
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Symbol ?
MKSI MKS Instruments Inc
Insider ?
MCCARTHY, MICHELLE M SVP & Chief Accounting Officer
Side ?
Disposal
Shares ?
968
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Symbol ?
MKSI MKS Instruments Inc
Insider ?
MCCARTHY, MICHELLE M SVP & Chief Accounting Officer
Side ?
Acquisition
Shares ?
1736
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Symbol ?
MKSI MKS Instruments Inc
Insider ?
MCCARTHY, MICHELLE M SVP & Chief Accounting Officer
Side ?
Disposal
Shares ?
1736
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Symbol ?
MKSI MKS Instruments Inc
Insider ?
MCCARTHY, MICHELLE M SVP & Chief Accounting Officer
Side ?
Acquisition
Shares ?
1673
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Symbol ?
MKSI MKS Instruments Inc
Insider ?
MCCARTHY, MICHELLE M SVP & Chief Accounting Officer
Side ?
Acquisition
Shares ?
1107
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Symbol ?
MKSI MKS Instruments Inc
Insider ?
MCCARTHY, MICHELLE M SVP & Chief Accounting Officer
Side ?
Acquisition
Shares ?
968
Value ?
-
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Acquisition
Shares ?
140809
Value ?
9365207
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Disposal
Shares ?
61604
Value ?
4097282
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Acquisition
Shares ?
46937
Value ?
3121780
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Disposal
Shares ?
20535
Value ?
1365783
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Acquisition
Shares ?
19631
Value ?
1305658
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Acquisition
Shares ?
16085
Value ?
1069813
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Acquisition
Shares ?
15284
Value ?
1016539
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
LEE, TING-CHUAN Director
Side ?
Acquisition
Shares ?
570000
Value ?
917700
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
BISIO, RONALD Sr. Vice President
Side ?
Acquisition
Shares ?
13689
Value ?
910455
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
LARGE, PETER Senior Vice President
Side ?
Acquisition
Shares ?
13689
Value ?
910455
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
SCHWARTZ, MARK DAVID Senior VP, AECO
Side ?
Acquisition
Shares ?
10757
Value ?
715448
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Disposal
Shares ?
8589
Value ?
571254
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
TSAI, CHUN-JUNG Director
Side ?
Acquisition
Shares ?
330000
Value ?
531300
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
KEATING, CHRISTOPHER F Sr. VP Transportation
Side ?
Acquisition
Shares ?
7334
Value ?
487784
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
TSAI, CHUN-HSIEN Director, CEO, PRESIDENT, CHAIRMAN
Side ?
Acquisition
Shares ?
300000
Value ?
483000
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
ALLISON, JENNIFER Corporate VP, General Counsel
Side ?
Acquisition
Shares ?
7089
Value ?
471489
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Disposal
Shares ?
7038
Value ?
468097
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
PAINTER, ROBERT G Director, President & CEO
Side ?
Disposal
Shares ?
6687
Value ?
444752
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
SCHWARTZ, MARK DAVID Senior VP, AECO
Side ?
Acquisition
Shares ?
6032
Value ?
401188
Industry ?
Scientific & Technical Instruments
Date ?
15 Apr 2026
Insider ?
SCHWARTZ, MARK DAVID Senior VP, AECO
Side ?
Acquisition
Shares ?
5996
Value ?
398794
Industry ?
Scientific & Technical Instruments