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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
HCM
776
Hollencrest Capital Management
California
$331
APW
777
Atlantic Private Wealth
North Carolina
$331
SHIM
778
Stone House Investment Management
Pennsylvania
$331
KG
779
Kilter Group
New York
$331
VR
780
Vision Retirement
New Jersey
$331
Norges Bank
781
Norges Bank
Norway
Two Sigma Advisers
782
Two Sigma Advisers
New York
Arrowstreet Capital
783
Arrowstreet Capital
Massachusetts
1832 Asset Management
784
1832 Asset Management
Ontario, Canada
Jennison Associates
785
Jennison Associates
New York
Skandinaviska Enskilda Banken (SEB)
786
Skandinaviska Enskilda Banken (SEB)
Sweden
IHAM
787
Integral Health Asset Management
New York
FAF
788
Första AP-fonden
Sweden
Lord, Abbett & Co
789
Lord, Abbett & Co
New Jersey
ZIG
790
Zurich Insurance Group
Switzerland
MMC
791
Mizuho Markets Cayman
Cayman Islands
BBVA
792
Banco Bilbao Vizcaya Argentaria
Spain
APM
793
Avidity Partners Management
Texas
AGP
794
Artia Global Partners
Florida
MSE
795
MUFG Securities EMEA
United Kingdom
AIMCA
796
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
CIBC World Market
797
CIBC World Market
Ontario, Canada
KCM
798
Kornitzer Capital Management
Kansas
ACM
799
Atika Capital Management
New York
Pacer Advisors
800
Pacer Advisors
Pennsylvania