ALNY icon

Alnylam Pharmaceuticals
ALNY

Overview Fund Activity

617 hedge funds and large institutions have $34.2B invested in Alnylam Pharmaceuticals in 2025 Q1 according to their latest regulatory filings, with 107 funds opening new positions, 236 increasing their positions, 197 reducing their positions, and 67 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
617
Holders Change
+32
Holders Change %
+5.47%
% of All Funds
8.38%
Holding in Top 10
10
Holding in Top 10 Change
+6
Holding in Top 10 Change %
+150%
% of All Funds
0.14%
New
107
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
+$493M
2
Bank of America
Bank of America
North Carolina
+$174M
3
Invesco
Invesco
Georgia
+$95.9M
4
Vanguard Group
Vanguard Group
Pennsylvania
+$87.3M
5
Point72 Asset Management
Point72 Asset Management
Connecticut
+$81.2M

Top Sellers

1
Wellington Management Group
Wellington Management Group
Massachusetts
-$428M
2
Capital International Investors
Capital International Investors
California
-$334M
3
Baillie Gifford & Co
Baillie Gifford & Co
United Kingdom
-$103M
4
BlackRock
BlackRock
New York
-$88M
5
Corient Private Wealth
Corient Private Wealth
Florida
-$63.7M
Name Holding Trade Value Shares
Change 		Shares
Change %
CCIA
626
Campbell & Co Investment Adviser
Maryland
– -$3.97M -16,858 Closed
EP
627
Edgestream Partners
New Jersey
– -$3.25M -13,806 Closed
QIM
628
Quantitative Investment Management
Virginia
– -$2.59M -11,010 Closed
Natixis Advisors
629
Natixis Advisors
Massachusetts
– -$2.46M -10,453 Closed
LFM
630
LGT Fund Management
Liechtenstein
– -$2.37M -10,070 Closed
ERSOT
631
Employees Retirement System of Texas
Texas
– -$1.98M -8,403 Closed
GCP
632
Garda Capital Partners
Minnesota
– -$1.92M -8,143 Closed
Hudson Bay Capital Management
633
Hudson Bay Capital Management
Connecticut
– -$1.76M -7,500 Closed
SGH
634
Sivik Global Healthcare
Connecticut
– -$1.65M -7,000 Closed
BA
635
Bridgewater Associates
Connecticut
– -$1.52M -6,452 Closed
AIM
636
Achmea Investment Management
Netherlands
– -$1.38M -5,847 Closed
GCP
637
GSA Capital Partners
United Kingdom
– -$1.03M -4,360 Closed
FHB
638
First Hawaiian Bank
Hawaii
– -$941K -4,000 Closed
BBA
639
Baader Bank Aktiengesellschaft
Germany
– -$905K -3,846 Closed
Janney Montgomery Scott
640
Janney Montgomery Scott
Pennsylvania
– -$746K -3,170 Closed
ADIM
641
Alpha DNA Investment Management
Maryland
– -$710K -3,019 Closed
ACM
642
ADAR1 Capital Management
Texas
– -$682K -2,900 Closed
FRM
643
Fox Run Management
Connecticut
– -$661K -2,809 Closed
SGAM
644
Smith Group Asset Management
Texas
– -$647K -2,750 Closed
HCA
645
Harbor Capital Advisors
Illinois
– -$624K -2,650 Closed
AIM
646
Aigen Investment Management
New York
– -$613K -2,606 Closed
BFG
647
Bleakley Financial Group
New Jersey
– -$610K -2,590 Closed
SRL
648
Scientech Research LLC
New Jersey
– -$537K -2,280 Closed
ATN
649
AMF Tjänstepension
Sweden
– -$492K -2,089 Closed
BAM
650
Blueshift Asset Management
New Jersey
– -$400K -1,698 Closed
24 25
26
27 28