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Lee John Tseng-Chung
President & CEO at MKS. Filing since 2 Mar 2009.
CIK 0001414656
Company
Date
Role
Action
Shares
Amount
Of holding
MKSI
MKS INC
14 Aug 2026
President & CEO
Sold on a plan
10,000
$3.02M
6.9%
MKSI
MKS INC
22 May 2026
President & CEO
Sold on a plan
10,000
$3.15M
6.5%
MKSI
MKS INC
20 Feb 2026
President & CEO
Sold at will
30,000
$7.70M
16.2%
MKSI
MKS INC
20 Feb 2018
Sr. VP & COO
Sold, plan not stated
13,432
$1.55M
100.0%
MKSI
MKS INC
13 Nov 2017
Sr. VP & COO
Sold, plan not stated
2,113
$219.78K
100.0%
MKSI
MKS INC
22 Feb 2017
Sr. VP & COO
Sold, plan not stated
14,734
$1.00M
100.0%
MKSI
MKS INC
10 Aug 2016
Sr. VP, Business Units
Sold, plan not stated
9,955
$461.52K
100.0%
MKSI
MKS INC
26 Feb 2016
Sr. VP, Business Units
Sold, plan not stated
994
$32.50K
9.4%
MKSI
MKS INC
17 Feb 2016
Sr. VP, Business Units
Sold, plan not stated
1,371
$45.60K
15.9%
MKSI
MKS INC
11 Feb 2016
Sr. VP, Business Units
Sold, plan not stated
1,435
$45.86K
26.4%
MKSI
MKS INC
14 May 2015
Sr. VP, Business Units
Sold, plan not stated
10,747
$390.75K
100.0%
MKSI
MKS INC
13 Jun 2014
Sr. VP, Business Units
Sold, plan not stated
9,128
$269.70K
100.0%
MKSI
MKS INC
29 Nov 2013
Sr. VP, HPS, Controls & PFMC
Bought
443
$10.62K
85.2%
MKSI
MKS INC
31 May 2013
Sr. VP, HPS, Controls & PFMC
Bought
520
$10.63K
opened
MKSI
MKS INC
14 Mar 2013
Sr. VP, HPS, Controls & PFMC
Sold, plan not stated
8,160
$225.50K
100.0%
MKSI
MKS INC
30 Nov 2012
Sr. VP, Controls & PFMC
Bought
479
$9.88K
opened
MKSI
MKS INC
6 Aug 2012
Sr. VP, Controls & PFMC
Sold, plan not stated
2,868
$76.50K
100%
MKSI
MKS INC
9 Mar 2012
Sr. VP, Controls & PFMC
Sold, plan not stated
8,595
$250.34K
100.0%
MKSI
MKS INC
8 Nov 2011
Sr. VP, Controls & PFMC
Sold, plan not stated
3,140
$86.54K
100.0%
MKSI
MKS INC
17 Mar 2011
Group VP
Sold, plan not stated
4,449
$130.38K
100.0%
MKSI
MKS INC
8 Mar 2011
Group VP, CIT and PFMC
Sold, plan not stated
6,129
$195.02K
100.0%
MKSI
MKS INC
5 Nov 2010
Group VP, CIT Products
Sold, plan not stated
2,374
$51.28K
100%
MKSI
MKS INC
26 Apr 2010
Group VP, CIT Products
Sold, plan not stated
6,623
$159.95K
100%
MKSI
MKS INC
11 Feb 2010
Group VP, CIT Products
Sold, plan not stated
2,409
$45.14K
100.0%
MKSI
MKS INC
28 Jul 2009
Group VP & GM CIT/ION Products
Sold, plan not stated
6,187
$118.36K
100.0%
MKSI
MKS INC
2 Mar 2009
Group VP & GM CIT/ION Products
Sold, plan not stated
1,574
$18.71K
34.0%
26 decisions on file.
