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JK

Johannes Jacob Pieter Kastelein

Insider · Chief Scientific Officer · NAMS

Johannes Jacob Pieter Kastelein files insider transactions with the SEC as a chief scientific officer of NewAmsterdam Pharma Co (NAMS). We hold 6 disclosed purchases and sales filed since 3 January 2024, 1 of them in the last 90 days.

  • Files forNAMS
  • Disclosed buys and sells6 in all, 1 in the last 90 days
  • Last disclosure25 August 2026

Positions held

1 post we hold — a term names its own dates; a run of filings only says when they filed
  • Filed 1 January 2024 — 24 August 2026Chief Scientific Officer · NewAmsterdam Pharma Co (NAMS)47 Form 4 lines · source: SEC Form 4

Everything they disclosed

47 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.