SCHEDULE 13G/A

NEWAMSTERDAM PHARMA COMPANY

Ordinary Shares, nominal value EUR0.12 per share · CUSIP: N62509109

Event date: 2025-03-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• RA Capital Management, L.P.

  Shares: 11,063,125.00 · Class: 9.9%

• Peter Kolchinsky

  Shares: 11,063,125.00 · Class: 9.9%

• Rajeev Shah

  Shares: 11,063,125.00 · Class: 9.9%

• RA Capital Healthcare Fund, L.P.

  Shares: 11,063,125.00 · Class: 9.9%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.