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Alnylam Pharmaceuticals
ALNY

Overview Fund Activity

646 hedge funds and large institutions have $43B invested in Alnylam Pharmaceuticals in 2025 Q2 according to their latest regulatory filings, with 97 funds opening new positions, 257 increasing their positions, 214 reducing their positions, and 63 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
646
Holders Change
+28
Holders Change %
+4.53%
% of All Funds
8.66%
Holding in Top 10
9
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-10%
% of All Funds
0.12%
New
97
Increased
257
Reduced
214
Closed
63
Calls
$188M
Puts
$203M
Net Calls
-$15.5M
Net Calls Change
-$50.8M

Top Buyers

1
Citadel Advisors
Citadel Advisors
Florida
$196M
2
Holocene Advisors
Holocene Advisors
New York
$195M
3
ClearBridge Investments
ClearBridge Investments
New York
$182M
4
Macquarie Group
Macquarie Group
Australia
$196M
5
Fidelity Investments
Fidelity Investments
Massachusetts
$5.15B

Top Sellers

1
AQR Capital Management
AQR Capital Management
Connecticut
$61.3M
2
Baillie Gifford & Co
Baillie Gifford & Co
United Kingdom
$989M
3
Wellington Management Group
Wellington Management Group
Massachusetts
$677M
4
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
$1.03B
5
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT)
United Kingdom
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
ASRS
151
Arizona State Retirement System
Arizona
$12.4M +$222K +680 +2%
Parnassus Investments
152
Parnassus Investments
California
$12.2M +$12.2M +37,412 New
Teacher Retirement System of Texas
153
Teacher Retirement System of Texas
Texas
$11.9M +$366K +1,123 +3%
OBAM
154
ODDO BHF Asset Management
France
$11.7M +$5.26M +16,119 +81%
Canada Pension Plan Investment Board
155
Canada Pension Plan Investment Board
Ontario, Canada
$11.6M -$8.16M -25,012 -41%
RSS
156
Rosenblum Silverman Sutton
California
$11.2M -$78.3K -240 -0.7%
TRSOTSOK
157
Teachers Retirement System of the State of Kentucky
Kentucky
$10.8M +$165K +505 +2%
EGM
158
Engineers Gate Manager
New York
$10.6M +$2.36M +7,238 +29%
ATN
159
AMF Tjänstepension
Sweden
$10.6M +$10.6M +32,537 New
Rafferty Asset Management
160
Rafferty Asset Management
New York
$10.5M -$4.04M -12,389 -28%
IMCOOI
161
Investment Management Corp of Ontario (IMCO)
Canada
$10.3M +$2.69M +8,244 +35%
BNP Paribas Asset Management
162
BNP Paribas Asset Management
France
$10.2M +$5.07M +15,569 +98%
Zurich Cantonal Bank
163
Zurich Cantonal Bank
Switzerland
$10M -$8.6M -26,368 -46%
LPL Financial
164
LPL Financial
California
$9.89M +$3.15M +9,660 +47%
AG
165
AIA Group
Hong Kong
$9.86M +$1.22M +3,741 +14%
SO
166
STRS Ohio
Ohio
$9.83M +$431K +1,323 +5%
FAF
167
Fjarde Ap-fonden
Sweden
$9.79M +$1.01M +3,100 +12%
EAM
168
Erste Asset Management
Austria
$9.62M +$2.1M +6,500 +28%
Brown Advisory
169
Brown Advisory
Maryland
$9.61M -$624K -1,914 -6%
ITP
170
Iron Triangle Partners
Connecticut
$9.57M -$11.8M -36,070 -55%
PCMH
171
Polymer Capital Management (HK)
Hong Kong
$9.41M +$3.61M +11,065 +62%
CUAMC
172
China Universal Asset Management Company
China
$9.07M -$1.03M -3,154 -10%
Fiera Capital (Canada)
173
Fiera Capital (Canada)
Quebec, Canada
$9.05M +$3.43M +10,531 +61%
ACM
174
Atika Capital Management
New York
$9.03M +$9.03M +27,700 New
DnB Asset Management
175
DnB Asset Management
Norway
$8.96M +$54.1K +166 +0.6%
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