Lee John Tseng-Chung (CIK 0001414656)

Latest company ownership

Role: CEO
Shares held
1,651
Last filed at
Nov 4, 2025
Confidence Score
27.3
2025Q4
Confidence Score History
2013Q1 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Oct 31, 2025 Nov 4, 2025 MKS INC CEO Sell 20.0 -2,003 -1.34% $287.9K
Feb 18, 2025 Feb 19, 2025 MKS INC CEO Sell 37.5 -27,332 -15.67% $2.8M
Dec 6, 2024 Dec 10, 2024 MKS INC CEO Sell 20.0 -2,994 -2.59% $343.1K
Feb 15, 2024 Feb 16, 2024 MKS INC CEO Sell 37.5 -30,231 -21.19% $3.7M
Dec 1, 2023 Dec 5, 2023 MKS INC CEO Sell 20.0 -3,275 -4.02% $275.7K
Feb 15, 2023 Feb 16, 2023 MKS INC CEO Sell 10.0 -20,862 -21.13% $2.1M
Feb 15, 2022 Feb 16, 2022 MKS INC CEO Sell 10.0 -13,839 -21.18% $2.1M
Feb 16, 2021 Feb 17, 2021 MKS INC CEO Sell 10.0 -9,804 -22.38% $1.7M
Feb 18, 2020 Feb 19, 2020 MKS INC CEO Sell 12.5 -6,301 -22.69% $717.5K
Feb 15, 2019 Feb 19, 2019 MKS INC COO Sell 7.5 -7,650 -39.48% $648K
Feb 20, 2018 Feb 21, 2018 MKS INC COO Sell 17.5 -13,432 -89.35% $1.5M
Feb 15, 2018 Feb 16, 2018 MKS INC COO Sell 7.5 -8,245 -38.03% $916K
Nov 13, 2017 Nov 14, 2017 MKS INC COO Sell 22.5 -2,113 -99.96% $219.8K
May 11, 2017 May 12, 2017 MKS INC COO Sell 10.0 -1,674 -47.04% $134.8K
Feb 22, 2017 Feb 23, 2017 MKS INC COO Sell 17.5 -14,734 -99.99% $1M
Feb 15, 2017 Feb 16, 2017 MKS INC COO Sell 7.5 -6,449 -30.44% $436.6K
Feb 10, 2017 Feb 14, 2017 MKS INC COO Sell 10.0 -2,377 -31.79% $159.1K
Aug 10, 2016 Aug 11, 2016 MKS INC Sr. VP, Business Units Sell 20.0 -9,955 -100.00% $461.5K
Feb 25, 2016 Feb 29, 2016 MKS INC Sr. VP, Business Units Sell 15.0 -2,607 -21.33% $85.4K
Feb 16, 2016 Feb 18, 2016 MKS INC Sr. VP, Business Units Sell 10.0 -3,596 -33.14% $119.5K
Feb 10, 2016 Feb 12, 2016 MKS INC Sr. VP, Business Units Sell 15.0 -3,851 -21.56% $124.9K
May 14, 2015 May 15, 2015 MKS INC Sr. VP, Business Units Sell 20.0 -10,747 -99.99% $390.8K
Feb 25, 2015 Feb 26, 2015 MKS INC Sr. VP, Business Units Sell 25.0 -1,616 -13.07% $57.9K
Feb 23, 2015 Feb 25, 2015 MKS INC Sr. VP, Business Units Sell 28.8 -1,064 -12.58% $37.9K
Feb 10, 2015 Feb 11, 2015 MKS INC Sr. VP, Business Units Sell 10.0 -2,417 -31.79% $86.7K
Jun 13, 2014 Jun 16, 2014 MKS INC Sr. VP, Business Units Sell 20.0 -9,128 -100.00% $269.7K
Feb 28, 2014 Mar 3, 2014 MKS INC Sr. VP, Business Units Sell 28.8 -1,050 -10.77% $31.6K
Feb 24, 2014 Feb 27, 2014 MKS INC Sr. VP and GM, Business Units Sell 15.0 -2,683 -21.69% $80.1K
Nov 29, 2013 Dec 4, 2013 MKS INC Sr. VP, HPS, Controls & PFMC Buy 91.3 +443 85.21% $10.6K
May 31, 2013 Jun 4, 2013 MKS INC Sr. VP, HPS, Controls & PFMC Buy 91.3 +520 100.00% $10.6K
Mar 14, 2013 Mar 15, 2013 MKS INC Sr. VP, HPS, Controls & PFMC Sell 22.5 -8,160 -99.99% $225.5K
Mar 4, 2013 Mar 5, 2013 MKS INC Sr. VP, HPS, Controls & PFMC Sell 23.8 -1,598 -16.38% $43.1K