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JL

John Tseng-Chung Lee

Insider · President & CEO · MKSI

John Tseng-Chung Lee files insider transactions with the SEC as a president & ceo of Mks Instruments (MKSI). We hold 3 disclosed purchases and sales filed since 11 October 2007, 1 of them in the last 90 days.

  • Files forMKSI
  • Disclosed buys and sells3 in all, 1 in the last 90 days
  • Last disclosure17 August 2026

Positions held

2 posts we hold — a term names its own dates; a run of filings only says when they filed
  • Filed 10 October 2007 — 14 August 2026President & CEO · Mks Instruments (MKSI)404 Form 4 lines · source: SEC Form 4
  • Filed 9 May 2022 — 21 February 2026Director · Cognex (CGNX)26 Form 4 lines · source: SEC Form 4

Everything they disclosed

120 entries, newest first — one per disclosure report, one per Form 4 line

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.