Kastelein Johannes Jacob Pieter's Form 4 filing
NewAmsterdam Pharma Co N.V. (NAMS) · filed Aug 25, 2026
- Accession no.
- 0001193125-26-365202
- Filed
- Aug 25, 2026, 4:30 PM ET
- Trade date
- Aug 24, 2026
- Filing delay
- 1 day
- Rule 10b5-1 plan
- Checked
This filing lists 2 non-derivative transactions and 1 derivative transaction. Open-market sales total $3.36M. It was filed 1 day after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Kastelein Johannes Jacob PieterCIK 0002000389 | Director, Officer (Chief Scientific Officer) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 24, 2026 | Ordinary Shares | MOption exerciseDisposed | −125,000 | $0.00 | $0 | 395,229 | Indirect |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- F1
The exercise price of the option is EUR 1.16392.
Referenced by the price of 1 transaction in Table I.
- F3
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $26.72 to $27.70 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.
Referenced by the price of 1 transaction in Table I.
Remarks
Reported transactions executed pursuant to a Rule 10b5-1 trading plan adopted by Futurum B.V. on March 31, 2026.