InsiderTrades

Lee John Tseng-Chung

SEC CIK 1414656 · EDGAR

Buying vs selling by month open-market trades, last 24 months, all 2 companies
BoughtSold

Companies

TickerCompanyTitleHoldingBoughtSoldTradesFirstLast
MKSIMKS INCPres, CEO, Dir 134.8K — $13.88M 192022-02-152026-08-14
CGNXCOGNEX CORPDir 24.8K — — 72023-05-092026-02-21

Most active insiders at MKSI, 12 months

#InsiderTitleBoughtSold
1 Lee John Tseng-ChungPres, CEO, Dir —$13.88M
2 COLELLA GERALD GDir —$11.74M
3 Henry David PhilipEVP, Gbl Str Mktg, GM, MSD —$3.24M
4 Mayampurath RamakumarEVP, CFO —$2.78M
5 Schreiner James AlanEVP, COO —$2.60M
6 Burke Kathleen FlahertyEVP, GC, Sec —$2.46M
7 Taranto Eric RobertEVP, GM, VSD —$2.28M
8 McCarthy Michelle MVP, CAO —$1.13M
9 Moloney Jacqueline FDir —$1.07M
10 CANNONE PETER IIIDir —$732.2K

Transactions 26

Type
Reset
X Filed Traded Ticker Company Insider Title Type Price Qty Owned ΔOwn Value
T 2026-08-17 10:11 2026-08-14 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir S - Sale $302.01 -10.0K 134.8K -7% -$3.02M
T 2026-05-26 14:15 2026-05-22 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir S - Sale $315.48 -10.0K 144.7K -6% -$3.15M
D 2026-02-24 2026-02-21 CGNX COGNEX CORP Lee John Tseng-Chung Dir M - OptEx $0.00 +2,913 24.8K +13% $0
M 2026-02-23 2026-02-20 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir S - Sale $256.77 -30.0K 171.4K -15% -$7.70M
D 2026-02-19 2026-02-18 CGNX COGNEX CORP Lee John Tseng-Chung Dir M - OptEx $0.00 +8,324 21.9K +61% $0
DM 2026-02-18 2026-02-17 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir M - OptEx — +69.9K 205.2K +52% —
D 2026-02-18 2026-02-17 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir F - Tax $260.74 -32.5K 184.7K -15% -$8.49M
DM 2025-11-04 2025-10-31 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir M - OptEx — +2,003 147.6K +1% —
D 2025-11-04 2025-10-31 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir F - Tax $143.71 -2,003 147.3K -1% -$287.9K
D 2025-05-12 2025-05-09 CGNX COGNEX CORP Lee John Tseng-Chung Dir M - OptEx $0.00 +1,848 13.6K +16% $0
DM 2025-02-24 2025-02-20+ CGNX COGNEX CORP Lee John Tseng-Chung Dir M - OptEx $0.00 +8,720 9,988 +688% $0
DM 2025-02-19 2025-02-18 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir M - OptEx — +61.8K 126.7K +95% —
D 2025-02-19 2025-02-18 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir F - Tax $103.67 -27.3K 147.1K -16% -$2.83M
D 2024-12-10 2024-12-06 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir F - Tax $114.60 -2,994 112.7K -3% -$343.1K
DM 2024-12-10 2024-12-06 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir M - OptEx — +2,994 114.7K +3% —
D 2024-05-10 2024-05-09 CGNX COGNEX CORP Lee John Tseng-Chung Dir M - OptEx $0.00 +1,109 3,015 +58% $0
D 2024-02-22 2024-02-21 CGNX COGNEX CORP Lee John Tseng-Chung Dir M - OptEx $0.00 +1,166 1,906 +158% $0
DM 2024-02-16 2024-02-15 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir M - OptEx — +64.5K 135.0K +92% —
D 2024-02-16 2024-02-15 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir F - Tax $122.15 -30.2K 112.4K -21% -$3.69M
DM 2023-12-05 2023-12-01 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir M - OptEx — +3,275 79.9K +4% —
D 2023-12-05 2023-12-01 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir F - Tax $84.19 -3,275 78.1K -4% -$275.7K
D 2023-05-11 2023-05-09 CGNX COGNEX CORP Lee John Tseng-Chung Dir M - OptEx $0.00 +740 740 New $0
DM 2023-02-16 2023-02-15 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir M - OptEx — +47.0K 98.7K +91% —
D 2023-02-16 2023-02-15 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir F - Tax $100.29 -20.9K 77.9K -21% -$2.09M
D 2022-02-16 2022-02-15 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir F - Tax $152.55 -13.8K 51.5K -21% -$2.11M
DM 2022-02-16 2022-02-15 MKSI MKS INC Lee John Tseng-Chung Pres, CEO, Dir M - OptEx — +31.2K 61.4K +103% —

Purchase Sale Sale after option exercise All abbreviations