NewAmsterdam Pharma Co N.V. (NAMS) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

26,858,565Shares Outstanding

4,931,581Shares held by institutions

$173,788,914Value of institutional holdings

34.76%Institutional ownership %

18.77%Shares Changed QoQ

49No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

NewAmsterdam Pharma Co N.V. (NASDAQ:NAMS) currently has 177 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

The collective stake of institutional investors in NewAmsterdam Pharma moved to 92.8% in December 2025, a shift down from the 96.2% reported for September 2025.
Quarterly data indicates a -2.23% shift in institutional share volume, and the annual owner count reflects an increase of 32.09%.
During the quarter, 108 institutions bought more NewAmsterdam Pharma shares, 48 sold shares, and 21 of the 177 total investors held their position steady.
The total number of shares held by institutions in NewAmsterdam Pharma decreased to 117.74Mn as of December 2025, a net change of down by 2.69Mn shares quarter on quarter, and up 18.72Mn shares year over year.
As of December 31, 2025, Frazier Life Sciences Management, L.P. held NewAmsterdam Pharma's largest shareholding position with over 16.94Mn shares, representing 13.36% of total outstanding shares.
Among the most significant buyers of NewAmsterdam Pharma during December 2025 were Duquesne Family Office LLC (1.15Mn), Castle Hook Partners LP (1.09Mn), WELLINGTON MANAGEMENT GROUP LLP (1.01Mn), FMR LLC (877.69K), GOLDMAN SACHS GROUP INC (845.11K).
Leading sellers of NewAmsterdam Pharma stock in December 2025 included Bain Capital Life Sciences Investors, LLC (3.41Mn), VIKING GLOBAL INVESTORS LP (2.27Mn), Cormorant Asset Management, LP (1.18Mn), ADAGE CAPITAL PARTNERS GP, L.L.C. (1.17Mn), Caption Management, LLC (1.10Mn).
The top 10 institutional holders of NewAmsterdam Pharma for the quarter ending December 2025 included Frazier Life Sciences Management, L.P. (16.94Mn), Capital World Investors (9.98Mn), RA CAPITAL MANAGEMENT, L.P. (9.55Mn), FCPM III SERVICES B.V. (9.20Mn), Bain Capital Life Sciences Investors, LLC (7.31Mn), FMR LLC (6.41Mn), WELLINGTON MANAGEMENT GROUP LLP (5.03Mn), VIKING GLOBAL INVESTORS LP (4.20Mn), DEERFIELD MANAGEMENT COMPANY, L.P. (4.16Mn), JENNISON ASSOCIATES LLC (3.49Mn).

177 Institutional Holders

4,931,581 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Frazier Life Sciences Management, L.P.	31 Dec, 2025	16,943,774	241,818	1.45%	$594,387,592.00
Capital World Investors	31 Dec, 2025	9,984,000	161,289	1.64%	$350,238,720.00
RA CAPITAL MANAGEMENT, L.P.	31 Dec, 2025	9,550,191	-588,747	-5.81%	$335,020,700.00
FCPM III SERVICES B.V.	31 Dec, 2025	9,198,900	-13,484	-0.15%	$322,697,412.00
Bain Capital Life Sciences Investors, LLC	31 Dec, 2025	7,306,566	-3,412,544	-31.84%	$256,314,335.00
FMR LLC	31 Dec, 2025	6,412,984	877,691	15.86%	$224,967,480.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	5,033,175	1,013,049	25.20%	$176,563,779.00
VIKING GLOBAL INVESTORS LP	31 Dec, 2025	4,203,567	-2,271,967	-35.09%	$147,461,130.00
DEERFIELD MANAGEMENT COMPANY, L.P.	31 Dec, 2025	4,164,789	-101,904	-2.39%	$146,100,798.00
JENNISON ASSOCIATES LLC	31 Dec, 2025	3,489,221	-709,333	-16.89%	$122,401,874.00
Duquesne Family Office LLC	31 Dec, 2025	3,070,146	1,146,446	59.60%	$107,701.00
Medicxi Ventures Management (Jersey) Ltd	31 Dec, 2025	2,869,565	0	0.00%	$100,664,340.00
Polar Capital Holdings Plc	31 Dec, 2025	2,776,222	-135,412	-4.65%	$97,389,868.00
JANUS HENDERSON GROUP PLC	31 Dec, 2025	2,341,723	224,648	10.61%	$82,299,855.00
Capital International Investors	31 Dec, 2025	2,062,535	0	0.00%	$72,353,728.00
MAVERICK CAPITAL LTD	31 Dec, 2025	1,894,226	389,479	25.88%	$66,449,448.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	1,725,662	845,110	95.98%	$60,536,223.00
ADAGE CAPITAL PARTNERS GP, L.L.C.	31 Dec, 2025	1,406,631	-1,170,000	-45.41%	$49,344,615.00
ALLIANCEBERNSTEIN L.P.	31 Dec, 2025	1,300,875	-840,903	-39.26%	$45,634,695.00
Castle Hook Partners LP	31 Dec, 2025	1,085,008	1,085,008	0.00%	$38,062,080.00

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