Johannes Jacob Pieter Kastelein

Chief Scientific Officer, Director, NewAmsterdam Pharma Co N.V.

Bought, 12 months

$0.0M

Sold, 12 months

$15.5M

Companies

Latest trade

Sep 30, 2026

Companies

NewAmsterdam Pharma Co N.V.Chief Scientific Officer, Director −$15.5M

Trades

NAMS Sold 50,246 shares at $25.03 · planned $1.3M Sep 30

NAMS Sold 125,000 shares at $26.91 · planned $3.4M Aug 24

NAMS Sold 101,409 shares at $30.29 · planned $3.1M Mar 9

NAMS Sold 94,124 shares at $30.32 · planned $2.9M Mar 6

NAMS Sold 104,467 shares at $30.30 · planned $3.2M Mar 5

NAMS Sold 45,481 shares at $35.31 $1.6M Feb 20

NAMS Sold 6,000 shares at $33.25 · planned $0.2M Jan 5

Open-market trades from SEC Form 4 only: no grants, option exercises or gifts. People are matched by the name on their filings, so two people with the same name share this page. For information only — not investment advice.