144 0002004379 XXXXXXXX LIVE 0001936258 NewAmsterdam Pharma Co. N.V. 001-41562 Gooimer 2-35 Naarden P7 1411 DC 310352062971 Louise Kooij Affiliate Ordinary Shares J.P. Morgan Securities LLC

390 Madison Avenue Floor 6 New York NY 10017

150000 3780000 112628458 09/09/2025 NASDAQ Ordinary Shares 11/22/2022 Exercise and Sell (Equity Compensation) NewAmsterdam Pharma Company N.V. (issuer) N 150000 09/10/2025 Cash N Louise Kooij C/O NewAmsterdam Pharma Compnay N.V.

Gooimeer 2-35 Naarden P7 1411 DC

Ordinary Shares 08/25/2025 8269 205547.82 Louise Kooij C/O NewAmsterdam Pharma Compnay N.V.

Gooimeer 2-35 Naarden P7 1411 DC

Ordinary Shares 09/03/2025 18073 453451.57 09/09/2025 J.P. Morgan Securities LLC, Workplace Solutions, as Agent and Attorney in Fact for Louise Kooij, NewAmsterdam Pharma Co. N.V.