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Alnylam Pharmaceuticals

781 hedge funds and large institutions have $42.4B invested in Alnylam Pharmaceuticals in 2026 Q1 according to their latest regulatory filings, with 103 funds opening new positions, 319 increasing their positions, 254 reducing their positions, and 154 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less ownership

Funds ownership:

less funds holding

Funds holding:

18% less capital invested

Capital invested by funds: $51.7B → $42.4B (-$9.26B)

25% less funds holding in top 10

Funds holding in top 10: 43 (-1)

33% less first-time investments, than exits

New positions opened: 103 | Existing positions closed: 154

Holders
781
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
3
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$450M
Puts
$205M
Net Calls
Net Calls Change

Top Buyers

1 +$1.17B
2 +$916M
3 +$546M
4
Two Sigma Investments
Two Sigma Investments
New York
+$468M
5
ClearBridge Investments
ClearBridge Investments
New York
+$258M

Top Sellers

1 -$1.87B
2 -$450M
3 -$448M
4
Invesco
Invesco
Georgia
-$297M
5
1832 Asset Management
1832 Asset Management
Ontario, Canada
-$175M
Name Holding Trade Value Shares
Change
Change in
Stake
Ensign Peak Advisors
126
Ensign Peak Advisors
Utah
$23M
State of Wisconsin Investment Board
127
State of Wisconsin Investment Board
Wisconsin
$22.8M
NIM
128
NEOS Investment Management
Connecticut
$22.8M
IIM
129
INTECH Investment Management
Florida
$22.5M
DM
130
Deerfield Management
New York
$22.5M
LPL Financial
131
LPL Financial
California
$22.4M
Schroder Investment Management Group
132
Schroder Investment Management Group
United Kingdom
$22.1M
DB
133
Danske Bank
Denmark
$21.8M
VIA
134
Vanguard Investments Australia
Australia
$21.8M
New York State Common Retirement Fund
135
New York State Common Retirement Fund
New York
$21.6M
VGA
136
Vanguard Global Advisers
Pennsylvania
$21.6M
SAM
137
Storebrand Asset Management
Norway
$21.4M
National Bank of Canada
138
National Bank of Canada
Quebec, Canada
$21M
Swedbank
139
Swedbank
Sweden
$20.6M
TI
140
Trexquant Investment
Connecticut
$20.4M
PPF
141
PFA Pension Forsikringsaktieselskab
$19.8M
DCM
142
Driehaus Capital Management
Illinois
$19.7M
PCMH
143
Polymer Capital Management (HK)
Hong Kong
$19.1M
Asset Management One
144
Asset Management One
Japan
$19.1M
Canada Life
145
Canada Life
Manitoba, Canada
$19M
TI
146
Tidal Investments
Wisconsin
$18.8M
Mirae Asset Global Investments
147
Mirae Asset Global Investments
South Korea
$18.7M
SG Americas Securities
148
SG Americas Securities
New York
$18.2M
Treasurer of the State of North Carolina
149
Treasurer of the State of North Carolina
North Carolina
$18M
VanEck Associates
150
VanEck Associates
New York
$17.9M