John Tseng-Chung Lee
CIK: 0001414656
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (40 total)
- Oct 30, 2026MKSI
MKS INC
Tax Payment(F)Direct2.2K shares at avg. $202.04$436K - Oct 30, 2026MKSI
MKS INC
Exercise(M)Direct1.5K shares- - Oct 30, 2026MKSI
MKS INC
Exercise(M)Direct679 shares- - Aug 14, 2026MKSI
MKS INC
Sale(S)Direct10K shares at avg. $302.01$3.0M - May 22, 2026MKSI
MKS INC
Sale(S)Direct10K shares at avg. $315.48$3.2M - Feb 21, 2026CGNX
COGNEX CORP
Exercise(M)Direct2.9K shares- - Feb 20, 2026MKSI
MKS INC
Sale(S)Direct2K shares at avg. $257.81$513K - Feb 20, 2026MKSI
MKS INC
Sale(S)Direct12.8K shares at avg. $256.93$3.3M - Feb 20, 2026MKSI
MKS INC
Sale(S)Direct13.3K shares at avg. $256.05$3.4M - Feb 20, 2026MKSI
MKS INC
Sale(S)Direct1.9K shares at avg. $259.70$491K - Feb 18, 2026CGNX
COGNEX CORP
Exercise(M)Direct8.3K shares- - Feb 17, 2026CGNX
COGNEX CORP
Award(A)DirectRestricted Stock Unit
4.8K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct22.1K shares- - Feb 17, 2026MKSI
MKS INC
Award(A)DirectRestricted Stock Unit
15.6K shares- - Feb 17, 2026MKSI
MKS INC
Tax Payment(F)Direct32.5K shares at avg. $260.74$8.5M - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct12.1K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct17K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct7.2K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct3.9K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct7.7K shares- - Feb 8, 2026MKSI
MKS INC
Award(A)DirectRestricted Stock Unit
51K shares- - Oct 31, 2025MKSI
MKS INC
Tax Payment(F)Direct2K shares at avg. $143.71$288K - Oct 31, 2025MKSI
MKS INC
Exercise(M)Direct352 shares- - Oct 31, 2025MKSI
MKS INC
Exercise(M)Direct1.7K shares- - May 9, 2025CGNX
COGNEX CORP
Exercise(M)Direct1.8K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 30, 2026 |  MKSI MKS INC | Tax Payment(F) | 2,157 | $202.04 | $435,890 | Direct |
| Oct 30, 2026 | MKSI MKS INC | Exercise(M) | 1,479 | - | $0 | Direct |
| Oct 30, 2026 | MKSI MKS INC | Exercise(M) | 679 | - | $0 | Direct |
| Aug 14, 2026 | MKSI MKS INC | Sale(S) | 10,000 | $302.01 | $3,020,100 | Direct |
| May 22, 2026 | MKSI MKS INC | Sale(S) | 10,000 | $315.48 | $3,154,800 | Direct |
| Feb 21, 2026 |  CGNX COGNEX CORP | Exercise(M) | 2,913 | - | $0 | Direct |
| Feb 20, 2026 | MKSI MKS INC | Sale(S) | 1,988 | $257.81 | $512,523 | Direct |
| Feb 20, 2026 | MKSI MKS INC | Sale(S) | 12,812 | $256.93 | $3,291,804 | Direct |
| Feb 20, 2026 | MKSI MKS INC | Sale(S) | 13,310 | $256.05 | $3,408,076 | Direct |
| Feb 20, 2026 | MKSI MKS INC | Sale(S) | 1,890 | $259.70 | $490,839 | Direct |
| Feb 18, 2026 | CGNX COGNEX CORP | Exercise(M) | 8,324 | - | $0 | Direct |
| Feb 17, 2026 | CGNX COGNEX CORP | Award(A) Restricted Stock Unit | 4,817 | - | - | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 22,088 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Award(A) Restricted Stock Unit | 15,593 | - | - | Direct |
| Feb 17, 2026 | MKSI MKS INC | Tax Payment(F) | 32,548 | $260.74 | $8,486,646 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 12,091 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 16,989 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 7,208 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 3,859 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 7,654 | - | $0 | Direct |
| Feb 8, 2026 | MKSI MKS INC | Award(A) Restricted Stock Unit | 50,972 | - | - | Direct |
| Oct 31, 2025 | MKSI MKS INC | Tax Payment(F) | 2,003 | $143.71 | $287,851 | Direct |
| Oct 31, 2025 | MKSI MKS INC | Exercise(M) | 352 | - | - | Direct |
| Oct 31, 2025 | MKSI MKS INC | Exercise(M) | 1,651 | - | - | Direct |
| May 9, 2025 | CGNX COGNEX CORP | Exercise(M) | 1,848 | - | - | Direct |
1-25 of 40 transactions
About Lee John Tseng-Chung
Lee John Tseng-Chung (SEC CIK 0001414656) files insider reports with the SEC as President & CEO of MKS INC (MKSI) and Director of COGNEX CORP (CGNX).
Signal8 holds 15 ownership filings by Lee John Tseng-Chung, all Form 4s, filed between Dec 10, 2024 and Nov 3, 2026. Those filings report 40 transactions, from Dec 6, 2024 to Oct 30, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Lee John Tseng-Chung's filings is in ANDOVER, MA.
Recent filings by Lee John Tseng-Chung
- Oct 30, 2026: Tax withholding of MKSI shares (Form 4, code F).
- Oct 30, 2026: Option exercises of MKSI shares (2 lines, Form 4, code M).
- Aug 14, 2026: Open-market sale of MKSI shares (Form 4, code S).
- May 22, 2026: Open-market sale of MKSI shares (Form 4, code S).
- Feb 21, 2026: Option exercise of CGNX shares (Form 4, code M).
Other insiders filing for MKS INC (MKSI)
- Mora Elizabeth, Director
- Donlan Renee Martel, EVP, GC & CCO
- Williams John Edward, EVP & GM, PSD
- Schreiner James Alan, EVP & COO
- McCarthy Michelle M, SVP & Chief Accounting Officer
- Henry David Philip, EVP, Global Str Mktg & GM, MSD