Insider · CIK 0002000389
Johannes Jacob Pieter Kastelein
Files at NAMS (NewAmsterdam Pharma Co N.V.). First filing Oct 2, 2026, latest Oct 2, 2026.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
NAMS: NewAmsterdam Pharma Co N.V.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 15Weak | NewAmsterdam Pharma Co N.V. | $1.3M 50,246 shares | -42% | +15% from low-41% from high |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | NAMS NewAmsterdam Pharma Co N.V. | MOption exercise Ordinary Sharesindirect: See footnotes10b5-1 | +50,246 | - | - | 119,548 | 10 d ago |
| Sep 30, 2026 | NAMS NewAmsterdam Pharma Co N.V. | SOpen-market sale Ordinary Sharesindirect: See footnotes10b5-1 | -50,246 | $25.03 | $1.3M | 69,302 | 10 d ago |
| Sep 30, 2026 | NAMS NewAmsterdam Pharma Co N.V. | MOption exercise Option (right to buy)derivativeindirect: See footnote10b5-1 | -50,246 | $0.00 | $0 | 344,983 | 10 d ago |
| Mar 26, 2025 | NAMS NewAmsterdam Pharma Co N.V. | AGrant or award Ordinary Sharesindirect: See footnote | +19,302 | $0.00 | $0 | 169,302 | Mar 28, 2025 |
| Mar 26, 2025 | NAMS NewAmsterdam Pharma Co N.V. | MOption exercise Ordinary Shares | +45,481 | $0.00 | $0 | 79,481 | Mar 28, 2025 |
| Mar 26, 2025 | NAMS NewAmsterdam Pharma Co N.V. | AGrant or award Restricted Stock Unitderivative | +45,481 | - | - | 45,481 | Mar 28, 2025 |
| Mar 26, 2025 | NAMS NewAmsterdam Pharma Co N.V. | MOption exercise Restricted Stock Unitderivative | -45,481 | - | - | 0 | Mar 28, 2025 |
| Mar 24, 2025 | NAMS NewAmsterdam Pharma Co N.V. | MOption exercise Ordinary Sharesindirect: See footnote | +150,000 | - | - | 150,000 | Mar 26, 2025 |
| Mar 24, 2025 | NAMS NewAmsterdam Pharma Co N.V. | MOption exercise Option (right to buy)derivativeindirect: See footnote | -150,000 | $0.00 | $0 | 820,229 | Mar 26, 2025 |
| Jan 7, 2025 | NAMS NewAmsterdam Pharma Co N.V. | AGrant or award Ordinary Shares | +34,000 | - | - | 34,000 | Jan 7, 2025 |
| Jan 2, 2025 | NAMS NewAmsterdam Pharma Co N.V. | AGrant or award Option (right to buy)derivative | +200,000 | $0.00 | $0 | 200,000 | Jan 6, 2025 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.