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NewAmsterdam Pharma Co N.V.

NAMS
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001936258

In the last 90 days, NewAmsterdam Pharma Co N.V. insiders filed 1 open-market purchase and 4 sales; 194 institutions reported holding it in 13F filings for Q2 2026, worth $4.13B in total; 3 superinvestors hold it, including Viking Global Investors and Maverick Capital.

Other share classesNAMSW

Q1 2026 vs. Q4 2025

How the institutions holding NewAmsterdam Pharma Co N.V. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026All holders in Q4 2025

13F holders of NAMS: Q4 2025 compared with Q1 2026
MeasureQ4 2025Of which not filed for Q1 2026Q1 2026Change
Holders1874171−12
Shares119.3M180.5K123.7M+4.50M (+3.8%)
Value$4.19B$6.33M$3.96B−$218.6M (−5.2%)

4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (24)

Institutions that held NewAmsterdam Pharma Co N.V. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to NAMS in Q1 2026
InstitutionSharesValue% of portfolio
Westfield Capital Management Co LP2,202,913$70.5M0.30%
SEB Asset Management AB272,654$8.73M0.04%
Marshall Wace, LLP264,802$8.48M0.01%
Peregrine Capital Management LLC178,493$5.71M0.21%
Victory Capital Management Inc172,663$5.53M0.00%
Vanguard Portfolio Management LLC135,031$4.32M0.00%
Catalio Capital Management, LP83,554$2.67M0.56%
Pavaki Capital Management LLC36,600$1.17M0.82%
Stifel Financial Corp29,221$935.2K0.00%
Vanguard Asset Management, Ltd28,146$901.0K0.00%
Headlands Technologies LLC27,676$885.9K0.10%
Eleva Capital SAS25,721$823.3K0.24%
Toroso Investments, LLC22,458$718.9K0.00%
DAFNA Capital Management LLC20,000$640.2K0.15%
Brevan Howard Capital Management LP16,800$527.9K0.01%
Altfest L J & Co Inc13,934$446.0K0.05%
Vanguard Investments Australia, Ltd.10,027$321.0K0.00%
Freestone Grove Partners LP3,000$96.0K0.00%
AdvisorNet Financial, Inc2,565$82.1K0.00%
KBC Group NV1,171$37.0K0.00%
FIL Ltd217$6.95K0.00%
Golden State Equity Partners60$1.92K0.00%
MAI Capital Management11$3530.00%
Allworth Financial LP9$2890.00%

Sold out (36)

Institutions that held NewAmsterdam Pharma Co N.V. at the end of Q4 2025 and filed for Q1 2026 without it.

Not filed for Q1 2026 yet (4)

Institutions that held NewAmsterdam Pharma Co N.V. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding NAMS in Q4 2025 that haven't filed for Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Vanguard Group Inc172,956$6.07M
CIBC Private Wealth Group, LLC7,240$254.0K
Global Retirement Partners, LLC270$9.47K
ORG Partners LLC60$2.10K