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Alnylam Pharmaceuticals

785 hedge funds and large institutions have $42.5B invested in Alnylam Pharmaceuticals in 2026 Q1 according to their latest regulatory filings, with 102 funds opening new positions, 320 increasing their positions, 257 reducing their positions, and 153 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 → $42.5B (-$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: 102 | Existing positions closed: 153

Holders
785
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
CTC
776
Central Trust Company
Missouri
$331
DCM
777
Davis Capital Management
Florida
$331
GEA
778
Glen Eagle Advisors
New Jersey
$331
HCM
779
Hollencrest Capital Management
California
$331
RJA
780
Ross\Johnson & Associates
Minnesota
$331
SA
781
Seneschal Advisors
Washington
$331
KG
782
Kilter Group
New York
$331
SHIM
783
Stone House Investment Management
Pennsylvania
$331
VR
784
Vision Retirement
New Jersey
$331
Norges Bank
785
Norges Bank
Norway
Two Sigma Advisers
786
Two Sigma Advisers
New York
Arrowstreet Capital
787
Arrowstreet Capital
Massachusetts
1832 Asset Management
788
1832 Asset Management
Ontario, Canada
Jennison Associates
789
Jennison Associates
New York
Skandinaviska Enskilda Banken (SEB)
790
Skandinaviska Enskilda Banken (SEB)
Sweden
IHAM
791
Integral Health Asset Management
New York
FAF
792
Första AP-fonden
Sweden
Lord, Abbett & Co
793
Lord, Abbett & Co
New Jersey
ZIG
794
Zurich Insurance Group
Switzerland
MMC
795
Mizuho Markets Cayman
Cayman Islands
BBVA
796
Banco Bilbao Vizcaya Argentaria
Spain
APM
797
Avidity Partners Management
Texas
AGP
798
Artia Global Partners
Florida
MSE
799
MUFG Securities EMEA
United Kingdom
AIMCA
800
Alberta Investment Management Corp (AIMCo)
Alberta, Canada