Senior insider sale
Chief Scientific Officer at NEWAMSTERDAM PHARMA CO N.V. — senior position signals high conviction
$3.48M
125K shares
What this filing means
KASTELEIN JOHANNES JACOB PIETER plans to sell 125K shares of NEWAMSTERDAM PHARMA CO N.V. valued at approximately $3.48M. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.
Filed: 8/24/2026ACC: 0001968582-26-000868
DirectorOfficer· Chief Scientific Officer
Since Mar 2026
125K
Shares to sell
$3.48M
Approx. market value
125K
Acquired (3 months)
1
Planned
Securities Acquired — Last 3 Months1
Option Exercise
Cash
8/24/2026
125KTotal acquired125K
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
8/24/2026 | Option Exercise Cash | 125K | — |
| Total | 125K | ||
Planned & Completed Dispositions1
NasdaqPlanned
Units to sell
125K
Market value
$3.48M
8/24/2026
Total
Units
125K
Value
$3.48M
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
8/24/2026 | 125K | $3.48M | Nasdaq | Planned |
| Total | 125K | $3.48M | ||