Senior insider sale
Chief Scientific Officer at NEWAMSTERDAM PHARMA CO N.V. — senior position signals high conviction
$4.97M
200K shares
What this filing means
KASTELEIN JOHANNES JACOB PIETER plans to sell 200K shares of NEWAMSTERDAM PHARMA CO N.V. valued at approximately $4.97M. 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: 8/25/2025ACC: 0002056296-25-000009
DirectorOfficer· Chief Scientific Officer
Since Mar 2026
200K
Shares to sell
$4.97M
Approx. market value
100K
Acquired (3 months)
1
Planned
2 completed
Securities Acquired — Last 3 Months1
Option Exercise
Cash
3/24/2025
100KTotal acquired100K
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
3/24/2025 | Option Exercise Cash | 100K | — |
| Total | 100K | ||
Planned & Completed Dispositions3
Completed
—Completed
Units to sell
50K
Market value
$1.26M
8/22/2025
—Completed
Units to sell
50K
Market value
$1.21M
8/21/2025
Planned — Approximate Date
Nasdaq Global MarketPlanned
Units to sell
100K
Market value
$2.50M
8/21/2025
Total
Units
200K
Value
$4.97M
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
| Completed | ||||
8/22/2025 | 50K | $1.26M | — | Completed |
8/21/2025 | 50K | $1.21M | — | Completed |
| Planned — Approximate Date | ||||
8/21/2025 | 100K | $2.50M | Nasdaq Global Market | Planned |
| Total | 200K | $4.97M | ||