X0609 4 2026-09-14 0001936258 NewAmsterdam Pharma Co N.V. NAMS 0001573785 Davidson Michael H. true C/O NEWAMSTERDAM PHARMA COMPANY N.V. GOOIMEER 2-35 NAARDEN P7 1411 DC NETHERLANDS true true false false Chief Executive Officer false Ordinary Shares 2026-09-14 4 P false 10000 22.65 A 792923 D Ordinary Shares 285715 I See footnote Includes 163,352 ordinary shares subject to restricted stock unit awards that remain subject to vesting. 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. 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. /s/ Michael Marino as Attorney-in-Fact for Michael H. Davidson 2026-09-15