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NewAmsterdam Pharma
NAMS

Overview Fund Activity

126 hedge funds and large institutions have $2.28B invested in NewAmsterdam Pharma in 2025 Q1 according to their latest regulatory filings, with 26 funds opening new positions, 51 increasing their positions, 32 reducing their positions, and 30 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
126
Holders Change
-4
Holders Change %
-3.08%
% of All Funds
1.71%
Holding in Top 10
7
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-12.5%
% of All Funds
0.1%
New
26
Increased
51
Reduced
32
Closed
30
Calls
$9.46M
Puts
$6.37M
Net Calls
+$3.09M
Net Calls Change
+$7.53M

Top Buyers

1
Capital World Investors
Capital World Investors
California
+$118M
2
RCM
RA Capital Management
Massachusetts
+$26.5M
3
Wellington Management Group
Wellington Management Group
Massachusetts
+$25.1M
4
Fidelity Investments
Fidelity Investments
Massachusetts
+$19.7M
5
JPMorgan Chase & Co
JPMorgan Chase & Co
New York
+$19M

Top Sellers

1
Millennium Management
Millennium Management
New York
-$9.82M
2
CAM
Cormorant Asset Management
Massachusetts
-$8.7M
3
OM
Opaleye Management
Massachusetts
-$8.35M
4
Marshall Wace
Marshall Wace
United Kingdom
-$7.41M
5
GC
GMT Capital
Georgia
-$7.33M
Name Holding Trade Value Shares
Change 		Shares
Change %
FLSM
1
Frazier Life Sciences Management
California
$330M +$4.09M +200,000 +1%
FIS
2
FCPM III Services
Netherlands
$224M +$6.92M +338,129 +3%
BCLSI
3
Bain Capital Life Sciences Investors
Massachusetts
$219M – – –
RCM
4
RA Capital Management
Massachusetts
$208M +$26.5M +1,293,938 +15%
Viking Global Investors
5
Viking Global Investors
Connecticut
$143M – – –
Capital World Investors
6
Capital World Investors
California
$139M +$118M +5,782,522 +569%
DM
7
Deerfield Management
New York
$84M -$4.31M -210,383 -5%
Jennison Associates
8
Jennison Associates
New York
$81.3M -$580K -28,352 -0.7%
Wellington Management Group
9
Wellington Management Group
Massachusetts
$72.5M +$25.1M +1,226,852 +53%
MVM
10
Medicxi Ventures Management
Jersey
$58.7M – – –
CAM
11
Cormorant Asset Management
Massachusetts
$57.8M -$8.7M -425,000 -13%
WP
12
Woodline Partners
California
$50M +$238K +11,615 +0.5%
Janus Henderson Group
13
Janus Henderson Group
United Kingdom
$47.9M +$10.1M +462,856 +27%
PCH
14
Polar Capital Holdings
United Kingdom
$46.1M +$10.2M +500,000 +29%
AllianceBernstein
15
AllianceBernstein
Tennessee
$45.9M +$7.86M +383,888 +21%
Capital International Investors
16
Capital International Investors
California
$42.2M – – –
Adage Capital Partners
17
Adage Capital Partners
Massachusetts
$39.9M +$18.4M +900,650 +86%
SL
18
Siren LLC
Connecticut
$39.1M -$3.76M -183,608 -9%
Pictet Asset Management
19
Pictet Asset Management
Switzerland
$37.1M +$13.4M +654,497 +57%
JPMorgan Chase & Co
20
JPMorgan Chase & Co
New York
$20.3M +$19M +930,341 +1,526%
Fidelity Investments
21
Fidelity Investments
Massachusetts
$19.7M +$19.7M +963,612 +454,534%
TCM
22
TimesSquare Capital Management
New York
$18.2M -$91.8K -4,486 -0.5%
DFO
23
Duquesne Family Office
New York
$16.4M +$10.5M +512,825 +178%
DC
24
Decheng Capital
California
$15.8M – – –
Citadel Advisors
25
Citadel Advisors
Florida
$14M -$6.02M -293,898 -30%
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