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K

Kastelein Johannes Jacob Pieter

Chief Scientific Officer

Open-market buys
0
$0 total
Open-market sells
8
$15.5M total
Tracking since
Jan 2026
Activity timeline
Open-market sale — $1.3M
NewAmsterdam Pharma Co N.V. · Sep 30, 2026
Open-market sale — $3.4M
NewAmsterdam Pharma Co N.V. · Aug 24, 2026
Open-market trades from the last two years.

6 more trades. A free account shows you more; Premium shows every one.

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Holdings as last reported
344,983 Option (right to buy) in NAMS
Held indirectly (See footnote) · as of 2026-09-30
115,000 Option (right to buy) in NAMSW
Held directly · as of 2026-01-07

3 more holdings. A free account shows you more; Premium shows every one.

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Companies touched
NewAmsterdam Pharma Co N.V.
CIK 0001936258