Kastelein Johannes Jacob Pieter
Chief Scientific Officer · 13 insider transactions on file
All transactions
| Date | Ticker | Company | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-03-09 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 101,409 | $30.29 | $3.1M | filing |
| 2026-03-09 | NAMS | NewAmsterdam Pharma Co N.V. | Option exercise | 101,409 | — | — | filing |
| 2026-03-06 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 94,124 | $30.32 | $2.9M | filing |
| 2026-03-06 | NAMS | NewAmsterdam Pharma Co N.V. | Option exercise | 94,124 | — | — | filing |
| 2026-03-05 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 104,467 | $30.30 | $3.2M | filing |
| 2026-03-05 | NAMS | NewAmsterdam Pharma Co N.V. | Option exercise | 104,467 | — | — | filing |
| 2026-02-20 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 30,789 | $35.46 | $1.1M | filing |
| 2026-02-20 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 14,692 | $35.00 | $514,220.00 | filing |
| 2026-01-07 | NAMS | NewAmsterdam Pharma Co N.V. | Award | 25,500 | — | — | filing |
| 2026-01-05 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 6,000 | $33.25 | $199,500.00 | filing |
| 2025-08-22 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 42,342 | $25.08 | $1.1M | filing |
| 2025-08-22 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 7,658 | $25.49 | $195,202.42 | filing |
| 2025-08-21 | NAMS | NewAmsterdam Pharma Co N.V. | Sale | 50,000 | $24.29 | $1.2M | filing |
Insider transactions from SEC Form 4 filings via EDGAR. Names appear as filed and aren't normalized across issuers.