Kastelein Johannes Jacob Pieter (CIK 0002000389)

Latest company ownership

Role: Chief Scientific Officer
Shares held
201,673
Last filed at
Mar 27, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2024Q1 2025Q4
Role: Chief Scientific Officer
Shares held
69,302
Last filed at
Aug 25, 2025
Confidence Score
43.9
2025Q4
Confidence Score History
2025Q3 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Aug 21, 2025 Aug 25, 2025 NewAmsterdam Pharma Co N.V. Chief Scientific Officer Sell 17.5 -100,000 -59.07% $2.5M
Mar 26, 2024 Mar 27, 2024 NewAmsterdam Pharma Co N.V. Chief Scientific Officer Sell 17.5 -201,673 -100.00% $4.3M