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Alnylam Pharmaceuticals
ALNY

Overview Fund Activity

640 hedge funds and large institutions have $42.9B invested in Alnylam Pharmaceuticals in 2025 Q2 according to their latest regulatory filings, with 96 funds opening new positions, 253 increasing their positions, 213 reducing their positions, and 63 closing their positions.

Holders
640
Holders Change
+22
Holders Change %
+3.56%
% of All Funds
8.6%
Holding in Top 10
9
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-10%
% of All Funds
0.12%
New
96
Increased
253
Reduced
213
Closed
63
Calls
$122M
Puts
$147M
Net Calls
-$25M
Net Calls Change
-$60.4M

Top Buyers

1
Norges Bank
1
Norges Bank
Norway
$663M
2
Citadel Advisors
2
Citadel Advisors
Florida
$196M
3
Holocene Advisors
3
Holocene Advisors
New York
$195M
4
ClearBridge Investments
4
ClearBridge Investments
New York
$182M
5
Macquarie Group
5
Macquarie Group
Australia
$196M

Top Sellers

1
AQR Capital Management
1
AQR Capital Management
Connecticut
$61.3M
2
Baillie Gifford & Co
2
Baillie Gifford & Co
United Kingdom
$989M
3
Wellington Management Group
3
Wellington Management Group
Massachusetts
$677M
4
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$1.03B
5
Qube Research & Technologies (QRT)
5
Qube Research & Technologies (QRT)
United Kingdom
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Arrowstreet Capital
76
Arrowstreet Capital
Massachusetts
$55.3M 169,700 +165,645 +4,085%
Victory Capital Management
77
Victory Capital Management
Texas
$51M 156,294 +118,645 +315%
Handelsbanken Fonder
78
Handelsbanken Fonder
Sweden
$50.7M 155,362 +38,679 +33%
Janus Henderson Group
79
Janus Henderson Group
United Kingdom
$49M 150,421 -31,228 -17%
Fidelity International
80
Fidelity International
Bermuda
$48.2M 147,937 +30,075 +26%
DM
81
Deerfield Management
New York
$47.3M 145,000 – –
BNP Paribas Financial Markets
82
BNP Paribas Financial Markets
France
$41.9M 128,634 +86,059 +202%
CIS
83
Capital International Sarl
California
$41.8M 128,286 +7,126 +6%
State Board of Administration of Florida Retirement System
84
State Board of Administration of Florida Retirement System
Florida
$41.4M 127,050 +1,810 +1%
EAM
85
Eventide Asset Management
Massachusetts
$41.1M 125,902 -40,548 -24%
AP
86
Antipodes Partners
Australia
$40M 122,804 -36,750 -23%
WorldQuant Millennium Advisors
87
WorldQuant Millennium Advisors
New York
$38.3M 117,373 -73,732 -39%
Balyasny Asset Management
88
Balyasny Asset Management
Illinois
$37.6M 115,275 +102,159 +779%
Universal-Beteiligungs- und Servicegesellschaft
89
Universal-Beteiligungs- und Servicegesellschaft
Germany
$37.3M 114,366 -3,354 -3%
DekaBank Deutsche Girozentrale
90
DekaBank Deutsche Girozentrale
Germany
$36.5M 113,193 +151 +0.1%
Mitsubishi UFJ Asset Management
91
Mitsubishi UFJ Asset Management
Japan
$36.5M 111,785 +5,906 +6%
Korea Investment Corp
92
Korea Investment Corp
South Korea
$36.1M 110,855 +5,096 +5%
HighTower Advisors
93
HighTower Advisors
Illinois
$35.6M 109,265 -4,592 -4%
D.E. Shaw & Co
94
D.E. Shaw & Co
New York
$35.3M 108,276 -181,586 -63%
SCM
95
Soleus Capital Management
Connecticut
$34.8M 106,750 +106,750 New
FCM
96
Frontier Capital Management
Massachusetts
$33.6M 103,003 +583 +0.6%
Ensign Peak Advisors
97
Ensign Peak Advisors
Utah
$32.7M 100,209 +19,730 +25%
RSCM
98
Rock Springs Capital Management
Maryland
$32.6M 100,000 -43,250 -30%
Neuberger Berman Group
99
Neuberger Berman Group
New York
$32.3M 99,044 +605 +0.6%
Aviva
100
Aviva
United Kingdom
$31.7M 97,065 +7,012 +8%
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4
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