Johannes Jacob Pieter Kastelein

Insider Reports History

Location
Naarden, Netherlands
Signature
/s/ Louise Kooij by Power of Attorney for Johannes Jacob Pieter Kastelein
All insider transactions
Transactions in reports broken out by “transaction date” reported in original SEC filing, see here for transactions aggregated across transaction date

Holdings reported by Johannes Jacob Pieter Kastelein:

Company Role Class Num Shares Value Price $ Report Date Ownership
NewAmsterdam Pharma Co N.V. Chief Scientific Officer, Director Ordinary Shares 69,302 $2,099,157 $30.29 09 Mar 2026 Indirect
NewAmsterdam Pharma Co N.V. Chief Scientific Officer, Director Option (right to buy) 520,229 09 Mar 2026 Indirect
NewAmsterdam Pharma Co N.V. Chief Scientific Officer, Director Option (right to buy) 115,000 07 Jan 2026 Direct
NewAmsterdam Pharma Co N.V. Chief Scientific Officer, Director Restricted Stock Unit 0 26 Mar 2025 Direct

Insider Reports Filed by Johannes Jacob Pieter Kastelein

Symbol Company Period Transactions Value $ Form Type Role Filing Time
NAMS NewAmsterdam Pharma Co N.V. 05 Mar 2026 9 -$9,090,868 4 Chief Scientific Officer, Director 09 Mar 2026, 20:18
NAMS NewAmsterdam Pharma Co N.V. 20 Feb 2026 2 -$1,605,998 4 Chief Scientific Officer, Director 24 Feb 2026, 16:40
NAMS NewAmsterdam Pharma Co N.V. 05 Jan 2026 3 -$199,500 4 Chief Scientific Officer, Director 07 Jan 2026, 18:31
NAMS NewAmsterdam Pharma Co N.V. 21 Aug 2025 3 -$2,471,640 4 Chief Scientific Officer, Director 25 Aug 2025, 17:04
NAMS NewAmsterdam Pharma Co N.V. 26 Mar 2025 4 $0 4 Chief Scientific Officer, Director 28 Mar 2025, 17:20
NAMS NewAmsterdam Pharma Co N.V. 24 Mar 2025 2 $0 4 Chief Scientific Officer, Director 26 Mar 2025, 16:27
NAMS NewAmsterdam Pharma Co N.V. 07 Jan 2025 1 $0 4 Chief Scientific Officer, Director 07 Jan 2025, 17:21
NAMS NewAmsterdam Pharma Co N.V. 02 Jan 2025 1 $0 4 Chief Scientific Officer, Director 06 Jan 2025, 17:48
NAMS NewAmsterdam Pharma Co N.V. 26 Mar 2024 4 -$4,349,630 4 Chief Scientific Officer, Director 27 Mar 2024, 16:30
NAMS NewAmsterdam Pharma Co N.V. 01 Jan 2024 1 $0 4 Chief Scientific Officer, Director 03 Jan 2024, 17:17
NAMS NewAmsterdam Pharma Co N.V. 29 Dec 2023 0 $0 3 Chief Scientific Officer, Director 29 Dec 2023, 16:30