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$NAMS All transactions

NewAmsterdam Pharma Co N.V.

▼ SELL

$ Value

$1.2M

Shares

50,000

Price

$24

Filed

Aug 25

Insider

Name

Kastelein Johannes Jacob Pieter

Title

Chief Scientific Officer

CIK

0002000389

Roles

Director Officer

Transaction Details

Transaction Date

2025-08-21

Code

S

Table

Non-Derivative

Ownership

Indirect

Equity Swap

No

Shares After

119,302

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.73 per share to $24.57 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. | The ordinary shares are held by Futurum B.V. ("Futurum") for the benefit of the Reporting Person. The Reporting Person exercises sole voting and investment control over the ordinary shares held by Futurum. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.39 per share to $25.35 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. | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.39 per share to $25.62 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.

Filing Info

Accession No.

0000950170-25-111241

Form Type

4

Issuer CIK

0001936258

Kastelein Johannes Jacob Pieter's History

Date Ticker Type Value
2026-01-07 NAMS A
2026-01-07 NAMS A $0
2026-01-05 NAMS $200K
2025-08-22 NAMS $1.1M
2025-08-22 NAMS $195K
2025-08-21 NAMS $1.2M

Other Insiders at NAMS (90d)

Insider Bought Sold Last
Kooij Louise Frederika
Chief Accounting Officer
$4.8M 2026-01-28