NEWAMSTERDAM PHARMA COMPANY

Ticker: NAMS CUSIP: N62509109 Class: Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 1,313 Value ($000) $46 Avg Close $36.39 Range $28.19 - $42.00

Q3 2025

Shares 1,097 Value ($000) $31 Avg Close $23.97 Range $17.97 - $28.91

Q2 2025

Shares 225 Value ($000) $4 Avg Close $18.24 Range $14.06 - $22.25

Q4 2024

Shares 176 Value ($000) $5 Avg Close $21.24 Range $15.51 - $27.29

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,313	$46	$36.39	$28.19 - $42.00
Q3 2025	1,097	$31	$23.97	$17.97 - $28.91
Q2 2025	225	$4	$18.24	$14.06 - $22.25
Q4 2024	176	$5	$21.24	$15.51 - $27.29