Company · Ownership research

NewAmsterdam Pharma Co N.V. NAMS

CIK 0001936258 · CUSIP N62509109

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP N62509109 (NAMS), not CUSIP N62509909 (NAMS), CUSIP N62509959 (NAMS), and does not merge CUSIPs.

This page lists the top 20 of 128 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Frazier Life Sciences Management, L.P. CIK 1892134 · View history	$329.90M 16,116,418 shares	15.08%	+200.00K(+1.3%)Added	SEC filing ↗ May 15, 2025	▾
02	FCPM III SERVICES B.V. CIK 2013410 · View history	$223.85M 10,935,310 shares	54.11%	+338.13K(+3.2%)Added	SEC filing ↗ May 15, 2025	▾
03	Bain Capital Life Sciences Investors, LLC CIK 1703031 · View history	$219.42M 10,719,110 shares	32.46%	0(0.0%)Unchanged	SEC filing ↗ May 15, 2025	▾
04	RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history	$207.54M 10,138,938 shares	3.47%	+1.29M(+14.6%)Added	SEC filing ↗ May 15, 2025	▾
05	VIKING GLOBAL INVESTORS LP CIK 1103804 · View history	$142.85M 6,978,534 shares	0.45%	0(0.0%)Unchanged	SEC filing ↗ May 15, 2025	▾
06	Capital World Investors CIK 1422849 · View history	$139.17M 6,798,598 shares	0.02%	+5.78M(+569.1%)Added	SEC filing ↗ May 12, 2025	▾
07	DEERFIELD MANAGEMENT COMPANY, L.P. CIK 1009258 · View history	$84.01M 4,103,957 shares	1.67%	-210.38K(-4.9%)Reduced	SEC filing ↗ May 15, 2025	▾
08	JENNISON ASSOCIATES LLC CIK 53417 · View history	$81.27M 3,970,189 shares	0.06%	-28.35K(-0.7%)Reduced	SEC filing ↗ May 5, 2025	▾
09	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$72.50M 3,541,975 shares	0.01%	+1.23M(+53.0%)Added	SEC filing ↗ May 13, 2025	▾
10	Medicxi Ventures Management (Jersey) Ltd CIK 1715579 · View history	$58.74M 2,869,565 shares	13.42%	0(0.0%)Unchanged	SEC filing ↗ Apr 11, 2025	▾
11	Cormorant Asset Management, LP CIK 1583977 · View history	$57.83M 2,825,000 shares	4.38%	-425.00K(-13.1%)Reduced	SEC filing ↗ May 15, 2025	▾
12	Woodline Partners LP CIK 1784547 · View history	$50.00M 2,442,397 shares	0.33%	+11.62K(+0.5%)Added	SEC filing ↗ May 15, 2025	▾
13	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$47.90M 2,199,633 shares	0.03%	+462.86K(+26.7%)Added	SEC filing ↗ May 15, 2025	▾
14	Polar Capital Holdings Plc CIK 1837309 · View history	$46.06M 2,250,000 shares	0.28%	+500.00K(+28.6%)Added	SEC filing ↗ May 15, 2025	▾
15	ALLIANCEBERNSTEIN L.P. CIK 1109448 · View history	$45.89M 2,241,953 shares	0.02%	+383.89K(+20.7%)Added	SEC filing ↗ May 15, 2025	▾
16	Capital International Investors CIK 1562230 · View history	$42.22M 2,062,535 shares	0.01%	0(0.0%)Unchanged	SEC filing ↗ May 12, 2025	▾
17	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$39.93M 1,950,650 shares	0.07%	+900.65K(+85.8%)Added	SEC filing ↗ May 15, 2025	▾
18	Siren, L.L.C. CIK 2005245 · Amended · View history	$39.14M 1,912,030 shares	2.21%	-183.61K(-8.8%)Reduced	SEC filing ↗ May 23, 2025	▾
19	Pictet Asset Management Holding SA CIK 1993888 · View history	$37.09M 1,811,949 shares	0.04%	+654.50K(+56.5%)Added	SEC filing ↗ May 5, 2025	▾
20	JPMORGAN CHASE & CO CIK 19617 · View history	$20.29M 991,318 shares	0.00%	+930.34K(+1525.7%)Added	SEC filing ↗ May 12, 2025	▾

Showing 20 / 128 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

128

Cancelled or null records excluded

Disclosed shares

111,177,846

Not deduplicated across managers

Disclosed value

$2.28B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

NewAmsterdam Pharma Co N.V. · Q1 2025

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.