Michael H. Davidson - 14 Sep 2026 Form 4 Insider Report for NewAmsterdam Pharma Co N.V. (NAMS)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: NAMS
Reported as of: 14 Sep 2026
Net transaction value: +$226,500
SEC form: 4
Accepted by SEC: 15 Sep 2026, 16:30:04 UTC
Prior SEC filing: 12 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Michael Marino as Attorney-in-Fact for Michael H. Davidson

Key filing fact

Michael H. Davidson filed Form 4 for NewAmsterdam Pharma Co N.V. (NAMS) on 15 Sep 2026.

Key facts

This page summarizes Michael H. Davidson's Form 4 filing for NewAmsterdam Pharma Co N.V. (NAMS).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 15 Sep 2026, 16:30.

Change

Previous filing in this sequence was filed on 12 Jun 2026.
Current net transaction value: +$226,500.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001573785 Primary reporting owner

Davidson Michael H.

Relationship: Chief Executive Officer, Director
Address: C/O NEWAMSTERDAM PHARMA COMPANY N.V., GOOIMEER 2-35, NAARDEN, NETHERLANDS
Signature: /s/ Michael Marino as Attorney-in-Fact for Michael H. Davidson
Signature date: 15 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

NAMS transaction

Ordinary Shares

Purchase

Transaction value: $226,500
Shares: +10,000
Change %: +1.3%
Price: $22.65
Shares after: 792,923
Date: 14 Sep 2026
Ownership: Direct
Footnotes: F1, F2

NAMS holding

Ordinary Shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 285,715
Date: 14 Sep 2026
Ownership: See footnote
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Includes 163,352 ordinary shares subject to restricted stock unit awards that remain subject to vesting.

Footnote F2

Reflects the prior transfer of 608,779 ordinary shares previously reported as indirectly beneficially owned by the Reporting Person. Such ordinary shares were previously held of record by Stichting Administratiekantoor EPNAP for the benefit of the Reporting Person.

Footnote F3

These Ordinary Shares are held by the Michael H. Davidson 2026 Grantor Retained Annuity Trust (the "GRAT"). The Reporting Person is the sole annuitant and trustee of the GRAT.