Lee John Tseng-Chung — SEC Form 4 filings
SEC reporting owner CIK 1414656. 18 Form 4 filings on record with FilingPulse; latest filed 2026-08-17.
Transaction summary — filings shown
Covers all 18 filings on record, filed 2024-02-06 to 2026-08-17. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 6 legs across 3 filings — 50,000 shares, $13,878,142 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 72.
- Largest priced transaction: sale of 13,310 shares @ $256.05 ($3,408,076) in MKS INC, filed 2026-02-23.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| MKS INC (MKSI) | President & CEO, Director | 11 | — | 6 legs · 50,000 sh · $13,878,142 | 55 |
| COGNEX CORP (CGNX) | Director | 7 | — | — | 17 |
Form 4 filings — Lee John Tseng-Chung
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-17 | 4 | MKS INC (MKSI) | Sale (S): 10,000 @ $302.01 | EDGAR |
| 2026-05-26 | 4 | MKS INC (MKSI) | Sale (S): 10,000 @ $315.48 | EDGAR |
| 2026-02-24 | 4 | COGNEX CORP (CGNX) | Option exercise (M): 2,913 @ $0 · Option exercise (M): 2,913 (derivative) @ $0 | EDGAR |
| 2026-02-23 | 4 | MKS INC (MKSI) | Sale (S): 13,310 @ $256.05 · Sale (S): 12,812 @ $256.93 · Sale (S): 1,988 @ $257.81 · Sale (S): 1,890 @ $259.70 | EDGAR |
| 2026-02-19 | 4 | COGNEX CORP (CGNX) | Option exercise (M): 8,324 @ $0 · Option exercise (M): 8,324 (derivative) @ $0 · Grant/award (A): 4,817 (derivative) @ $0 | EDGAR |
| 2026-02-18 | 4 | MKS INC (MKSI) | Option exercise (M): 22,088.09 · Option exercise (M): 7,653.60 · Option exercise (M): 3,859.12 · Option exercise (M): 7,208 · Option exercise (M): 16,989.44 · Option exercise (M): 12,091 · +8 more | EDGAR |
| 2026-02-09 | 4 | MKS INC (MKSI) | Grant/award (A): 50,971.84 (derivative) | EDGAR |
| 2025-11-04 | 4 | MKS INC (MKSI) | Option exercise (M): 352 · Option exercise (M): 1,651 · Tax withholding (F): 2,003 @ $143.71 · Option exercise (M): 352 (derivative) · Option exercise (M): 1,651 (derivative) | EDGAR |
| 2025-05-12 | 4 | COGNEX CORP (CGNX) | Option exercise (M): 1,848 @ $0 · Option exercise (M): 1,848 (derivative) @ $0 | EDGAR |
| 2025-02-24 | 4 | COGNEX CORP (CGNX) | Option exercise (M): 6,973 @ $0 · Option exercise (M): 1,747 @ $0 · Option exercise (M): 6,973 (derivative) @ $0 · Option exercise (M): 1,747 (derivative) @ $0 | EDGAR |
| 2025-02-20 | 4 | COGNEX CORP (CGNX) | Grant/award (A): 8,324 (derivative) @ $0 | EDGAR |
| 2025-02-19 | 4 | MKS INSTRUMENTS INC (MKSI) | Option exercise (M): 14,041.44 · Option exercise (M): 6,735.33 · Option exercise (M): 22,088 · Option exercise (M): 7,654 · Option exercise (M): 4,035.12 · Option exercise (M): 7,207 · +8 more | EDGAR |
| 2025-02-11 | 4 | MKS INSTRUMENTS INC (MKSI) | Grant/award (A): 12,106.58 (derivative) | EDGAR |
| 2024-12-10 | 4 | MKS INSTRUMENTS INC (MKSI) | Option exercise (M): 2,010 · Option exercise (M): 984 · Tax withholding (F): 2,994 @ $114.60 · Option exercise (M): 2,010 (derivative) · Option exercise (M): 984 (derivative) | EDGAR |
| 2024-05-10 | 4 | COGNEX CORP (CGNX) | Option exercise (M): 1,109 @ $0 · Option exercise (M): 1,109 (derivative) @ $0 | EDGAR |
| 2024-02-22 | 4 | COGNEX CORP (CGNX) | Option exercise (M): 1,166 @ $0 · Grant/award (A): 6,973 (derivative) @ $0 · Option exercise (M): 1,166 (derivative) @ $0 | EDGAR |
| 2024-02-16 | 4 | MKS INSTRUMENTS INC (MKSI) | Option exercise (M): 9,235.40 · Option exercise (M): 3,777.85 · Option exercise (M): 14,041 · Option exercise (M): 6,734 · Option exercise (M): 23,093 · Option exercise (M): 7,653 · +8 more | EDGAR |
| 2024-02-06 | 4 | MKS INSTRUMENTS INC (MKSI) | Grant/award (A): 69,279.09 (derivative) | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
Need this as JSON?
GET https://api.filingpulse.io/v1/insider-trades?owner_cik=1414656 returns every filing on this page — normalized, with footnotes and derivative legs — and webhooks push new filings to you in seconds. API docs →