X0508 4 2026-03-11 0001936258 NewAmsterdam Pharma Co N.V. NAMS 0001238401 LANGE LOUIS G C/O NEWAMSTERDAM PHARMA COMPANY N.V. GOOIMEER 2-35 NAARDEN P7 1411 DC NETHERLANDS true false false false false Ordinary Shares 2026-03-11 4 S false 44173 30.41 D 10806 D Ordinary Shares 2026-03-11 4 S false 446 31.23 D 10360 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.11 per share to $31.08 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 $31.13 per share to $31.31 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. /s/ Louise Kooij by Power of Attorney from Louis G. Lange 2026-03-12