NewAmsterdam Pharma Co N.V.

NAMSW

Exchange: Nasdaq
Industry: Pharmaceutical Preparations
SEC CIK: 0001936258

SEC filings (opens in a new tab)

In the last 90 days, NewAmsterdam Pharma Co N.V. insiders filed 1 open-market purchase and 3 sales; 9 institutions reported holding it in 13F filings for Q2 2026, worth $28.1M in total; no superinvestor holds it.

Other share classesNAMS

Q4 2025 vs. Q3 2025

How the institutions holding NewAmsterdam Pharma Co N.V. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025 All holders in Q3 2025

13F holders of NAMSW: Q3 2025 compared with Q4 2025
Measure	Q3 2025	Q4 2025	Change
Holders	9	9	0
Shares	1.30M	1.30M	−1.32K (−0.1%)
Value	$22.2M	$29.9M	+$7.68M (+34.5%)

New holders (1)

Institutions that held NewAmsterdam Pharma Co N.V. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to NAMSW in Q4 2025
Institution	Shares	Value	% of portfolio
Aristeia Capital LLC	15,708	$397.0K	0.01%

Sold out (1)

Institutions that held NewAmsterdam Pharma Co N.V. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of NAMSW in Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
Laurion Capital Management LP	16,666	$285.2K