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Alnylam Pharmaceuticals

817 hedge funds and large institutions have $59.2B invested in Alnylam Pharmaceuticals in 2025 Q3 according to their latest regulatory filings, with 224 funds opening new positions, 279 increasing their positions, 222 reducing their positions, and 49 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding in top 10

Funds holding in top 10:

more capital invested

Capital invested by funds: $ → $

more funds holding

Funds holding:

26% more repeat investments, than reductions

Existing positions increased: 279 | Existing positions reduced: 222

2.27% less ownership

Funds ownership: 101.28%99.02% (-2.3%)

13% less call options, than puts

Call options by funds: $562M | Put options by funds: $649M

Holders
817
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
13
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$562M
Puts
$649M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
Allianz Asset Management
101
Allianz Asset Management
Germany
$48.7M
Aviva
102
Aviva
United Kingdom
$47.1M
EAM
103
Eventide Asset Management
Massachusetts
$46.4M
SEI Investments
104
SEI Investments
Pennsylvania
$43.1M
Barclays
105
Barclays
United Kingdom
$43.1M
WP
106
Woodline Partners
California
$41.9M
Canada Life
107
Canada Life
Manitoba, Canada
$41.6M
Nomura Asset Management
108
Nomura Asset Management
Japan
$41M
Westfield Capital Management
109
Westfield Capital Management
Massachusetts
$40.1M
PHP
110
Parkman Healthcare Partners
Connecticut
$40M
ACM
111
Aquatic Capital Management
Illinois
$38.3M
Assenagon Asset Management
112
Assenagon Asset Management
Luxembourg
$36.7M
Skandinaviska Enskilda Banken (SEB)
113
Skandinaviska Enskilda Banken (SEB)
Sweden
$36.3M
CI
114
Capital International
California
$35.7M
JG
115
Jain Global
New York
$35.6M
Mitsubishi UFJ Trust & Banking
116
Mitsubishi UFJ Trust & Banking
Japan
$35.3M
CII
117
Capital International Inc
California
$34.5M
RSCM
118
Rock Springs Capital Management
Maryland
$33.9M
HSBC Holdings
119
HSBC Holdings
United Kingdom
$33.3M
Man Group
120
Man Group
United Kingdom
$32.7M
Asset Management One
121
Asset Management One
Japan
$31.7M
State of Wisconsin Investment Board
122
State of Wisconsin Investment Board
Wisconsin
$31.2M
DM
123
Deerfield Management
New York
$31M
Ensign Peak Advisors
124
Ensign Peak Advisors
Utah
$30.9M
Manulife (Manufacturers Life Insurance)
125
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$30.9M