NEWAMSTERDAM PHARMA COMPANY

Ticker: NAMS CUSIP: N62509109 Class: Stock

Siren, L.L.C.'s Holding History (CIK: 0002005245)

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

Q3 2025

Shares 765,705 Value ($000) $21,777 Avg Close $23.97 Range $17.97 - $28.91

Q2 2025

Shares 1,194,240 Value ($000) $21,628 Avg Close $18.24 Range $14.06 - $22.25

Q1 2025

Shares 1,912,030 Value ($000) $39,139 Avg Close $22.23 Range $17.18 - $26.80

Q4 2024

Shares 2,095,638 Value ($000) $53,858 Avg Close $21.24 Range $15.51 - $27.29

Q3 2024

Shares 920,564 Value ($000) $15,281 Avg Close $17.30 Range $15.19 - $21.48

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	765,705	$21,777	$23.97	$17.97 - $28.91
Q2 2025	1,194,240	$21,628	$18.24	$14.06 - $22.25
Q1 2025	1,912,030	$39,139	$22.23	$17.18 - $26.80
Q4 2024	2,095,638	$53,858	$21.24	$15.51 - $27.29
Q3 2024	920,564	$15,281	$17.30	$15.19 - $21.48