ALNY icon

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
AllianceBernstein
151
AllianceBernstein
Tennessee
$17.8M
CIS
152
Capital International Sarl
California
$17.7M
KK
153
KLP Kapitalforvaltning
Norway
$16.9M
Rafferty Asset Management
154
Rafferty Asset Management
New York
$16.7M
Stifel Financial
155
Stifel Financial
Missouri
$16.5M
TAF
156
Tredje AP-fonden
Sweden
$16.4M
Parnassus Investments
157
Parnassus Investments
California
$16.2M
FAF
158
Fjarde Ap-fonden
Sweden
$16.1M
JG
159
Jain Global
New York
$15.9M
Allianz Asset Management
160
Allianz Asset Management
Germany
$15.8M
IMCOOI
161
Investment Management Corp of Ontario (IMCO)
Canada
$15.6M
Osaic Holdings
162
Osaic Holdings
Arizona
$15.4M
State of New Jersey Common Pension Fund D
163
State of New Jersey Common Pension Fund D
New Jersey
$14.9M
Ohio Public Employees Retirement System (OPERS)
164
Ohio Public Employees Retirement System (OPERS)
Ohio
$14.6M
GAM
165
Gotham Asset Management
New York
$14.5M
MIF
166
Mediolanum International Funds
Ireland
$14.3M
WorldQuant Millennium Advisors
167
WorldQuant Millennium Advisors
New York
$13.9M
LF
168
Lansforsakringar Fondforvaltning
Sweden
$13.9M
Hudson Bay Capital Management
169
Hudson Bay Capital Management
Connecticut
$13.2M
RAM
170
Resona Asset Management
Japan
$13.1M
MGP
171
M&G plc
United Kingdom
$12.5M
BCM
172
Bronte Capital Management
Australia
$12.3M
GC
173
Guggenheim Capital
Illinois
$12.3M
FISPB
174
Fideuram - Intesa Sanpaolo Private Banking
$12.3M
NAM
175
Nissay Asset Management
Japan
$12.2M