Senior insider sale
Chief Scientific Officer at NEWAMSTERDAM PHARMA CO N.V. — senior position signals high conviction
$9.35M
300K shares
What this filing means
KASTELEIN JOHANNES JACOB PIETER plans to sell 300K shares of NEWAMSTERDAM PHARMA CO N.V. valued at approximately $9.35M. 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: 3/5/2026ACC: 0001968582-26-000230
DirectorOfficer· Chief Scientific Officer
Since Mar 2026
300K
Shares to sell
$9.35M
Approx. market value
300K
Acquired (3 months)
1
Planned
Securities Acquired — Last 3 Months1
Option Exercise
Cash
3/5/2026
300KTotal acquired300K
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
3/5/2026 | Option Exercise Cash | 300K | — |
| Total | 300K | ||
Planned & Completed Dispositions1
NasdaqPlanned
Units to sell
300K
Market value
$9.35M
3/2/2026
Total
Units
300K
Value
$9.35M
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
3/2/2026 | 300K | $9.35M | Nasdaq | Planned |
| Total | 300K | $9.35M | ||