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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
RhumbLine Advisers
76
RhumbLine Advisers
Massachusetts
$64.6M
Voloridge Investment Management
77
Voloridge Investment Management
Florida
$62.6M
National Pension Service
78
National Pension Service
South Korea
$60.8M
BNP Paribas Asset Management
79
BNP Paribas Asset Management
France
$59.6M
LCIP
80
Life Cycle Investment Partners
$58.7M
Susquehanna International Group
81
Susquehanna International Group
Pennsylvania
$57.7M
ProShare Advisors
82
ProShare Advisors
Maryland
$57.6M
Envestnet Asset Management
83
Envestnet Asset Management
Illinois
$56.8M
CBU
84
CIBC Bancorp USA
Illinois
$55.9M
Mitsubishi UFJ Asset Management
85
Mitsubishi UFJ Asset Management
Japan
$50.4M
SCM
86
SCS Capital Management
Massachusetts
$49.5M
VOYA Investment Management
87
VOYA Investment Management
Georgia
$49.1M
Janus Henderson Group
88
Janus Henderson Group
United Kingdom
$48.7M
Russell Investments Group
89
Russell Investments Group
United Kingdom
$48.5M
AP
90
Antipodes Partners
Australia
$48.1M
Capital Fund Management (CFM)
91
Capital Fund Management (CFM)
France
$46.4M
Universal-Beteiligungs- und Servicegesellschaft
92
Universal-Beteiligungs- und Servicegesellschaft
Germany
$46.1M
Aberdeen Group
93
Aberdeen Group
United Kingdom
$45.8M
Handelsbanken Fonder
94
Handelsbanken Fonder
Sweden
$45.2M
Brown Advisory
95
Brown Advisory
Maryland
$44.3M
SCM
96
Soleus Capital Management
Connecticut
$43.6M
Assenagon Asset Management
97
Assenagon Asset Management
Luxembourg
$42.6M
HF
98
HRT Financial
New York
$42.6M
Robeco Institutional Asset Management
99
Robeco Institutional Asset Management
Netherlands
$41.8M
O
100
OrbiMed
New York
$39.4M