AlphaYouJJ
Insider selling
Johannes Jacob Pieter Kastelein sold $1.3M of NewAmsterdam Pharma Co N.V. (NAMS) stock
Johannes Jacob Pieter Kastelein, Chief Scientific Officer of NewAmsterdam Pharma Co N.V. (NAMS), sold 50,246 shares of NAMS stock worth $1.3M, per an SEC Form 4 filed Oct 2, 2026.
The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.
The trade happened on Sep 30, 2026, 2 days before it was made public.
NAMS has moved -4.6% since the trade date, from $24.32 to $23.20 (Oct 2, 2026 close).
- Traded
- Sep 30, 2026
- Disclosed
- Oct 2, 2026
- Filing delay
- 2 days
- Price since
- -4.6%
- Role
- Chief Scientific Officer
- Source
- SEC Form 4
More NAMS insider and Congress trades
From a public SEC Form 4, linked above. Not investment advice, and not a recommendation to buy or sell.