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Alnylam Pharmaceuticals
ALNY

Overview Fund Activity

618 hedge funds and large institutions have $34.2B invested in Alnylam Pharmaceuticals in 2025 Q1 according to their latest regulatory filings, with 108 funds opening new positions, 236 increasing their positions, 197 reducing their positions, and 67 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
618
Holders Change
+33
Holders Change %
+5.64%
% of All Funds
8.4%
Holding in Top 10
10
Holding in Top 10 Change
+6
Holding in Top 10 Change %
+150%
% of All Funds
0.14%
New
108
Increased
236
Reduced
197
Closed
67
Calls
$274M
Puts
$238M
Net Calls
+$35.4M
Net Calls Change
+$6.38M

Top Buyers

1
Fidelity Investments
Fidelity Investments
Massachusetts
$4.13B
2
Bank of America
Bank of America
North Carolina
$287M
3
Invesco
Invesco
Georgia
$247M
4
Vanguard Group
Vanguard Group
Pennsylvania
$3.53B
5
Point72 Asset Management
Point72 Asset Management
Connecticut
$81.2M

Top Sellers

1
Wellington Management Group
Wellington Management Group
Massachusetts
$705M
2
Capital International Investors
Capital International Investors
California
$0
3
Baillie Gifford & Co
Baillie Gifford & Co
United Kingdom
$988M
4
BlackRock
BlackRock
New York
$2.58B
5
Corient Private Wealth
Corient Private Wealth
Florida
$11.5M
Name Holding Trade Value Shares
Change 		Shares
Change %
PAM
101
Panagora Asset Management
Massachusetts
$26.1M +$11.2M +41,340 +75%
Barclays
102
Barclays
United Kingdom
$25.8M -$2.19M -8,128 -8%
VOYA Investment Management
103
VOYA Investment Management
Georgia
$24.6M -$1.06M -3,942 -4%
Aviva
104
Aviva
United Kingdom
$24.3M +$3.46M +12,809 +17%
Axa
105
Axa
France
$23.9M -$1.8M -6,654 -7%
PHS
106
PFM Health Sciences
California
$23.5M +$23.5M +87,145 New
Nomura Asset Management
107
Nomura Asset Management
Japan
$23.4M +$1.1M +4,058 +5%
Skandinaviska Enskilda Banken (SEB)
108
Skandinaviska Enskilda Banken (SEB)
Sweden
$23.3M -$10.6M -39,367 -31%
Canada Life
109
Canada Life
Manitoba, Canada
$22.7M +$1.87M +6,909 +9%
PAI
110
Palo Alto Investors
California
$22.5M -$15.4M -57,193 -41%
CI
111
Capital International
California
$22.1M +$439K +1,624 +2%
Los Angeles Capital Management
112
Los Angeles Capital Management
California
$21.8M -$3.77M -13,960 -15%
Ensign Peak Advisors
113
Ensign Peak Advisors
Utah
$21.7M +$1.08M +4,015 +5%
JGC
114
J. Goldman & Co
New York
$20M +$20M +74,185 New
State of Wisconsin Investment Board
115
State of Wisconsin Investment Board
Wisconsin
$19.8M -$1.41M -5,220 -7%
Macquarie Group
116
Macquarie Group
Australia
$19.6M +$3.22M +11,928 +20%
Envestnet Asset Management
117
Envestnet Asset Management
Illinois
$19.5M +$1.63M +6,033 +9%
Susquehanna International Group
118
Susquehanna International Group
Pennsylvania
$19M +$16.1M +59,648 +551%
PHP
119
Parkman Healthcare Partners
Connecticut
$18.6M +$8.17M +30,266 +78%
Asset Management One
120
Asset Management One
Japan
$18.5M +$835K +3,094 +5%
CII
121
Capital International Inc
California
$18.1M -$10.3M -38,124 -36%
EHI
122
Eagle Health Investments
Connecticut
$17.7M -$2.86M -10,600 -14%
ITP
123
Iron Triangle Partners
Connecticut
$17.7M +$17.7M +65,409 New
New York State Common Retirement Fund
124
New York State Common Retirement Fund
New York
$17.4M -$2.15M -7,956 -11%
VanEck Associates
125
VanEck Associates
New York
$17.3M -$992K -3,674 -5%
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