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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 %
LP
251
LMR Partners
United Kingdom
$2.43M -$783K -2,901 -24%
Acadian Asset Management
252
Acadian Asset Management
Massachusetts
$2.42M -$2.08M -7,699 -46%
AB
253
Amalgamated Bank
New York
$2.39M +$99.6K +369 +4%
PA
254
Profund Advisors
Maryland
$2.38M -$235K -869 -9%
KRS
255
Kentucky Retirement Systems
Kentucky
$2.37M +$2.37M +8,794 New
AV
256
ASR Vermogensbeheer
Netherlands
$2.37M +$2.37M +8,763 New
Wealthfront Advisers
257
Wealthfront Advisers
California
$2.35M -$1.05M -3,899 -31%
FC
258
FORA Capital
Florida
$2.33M -$1.1M -4,074 -32%
Commonwealth Equity Services
259
Commonwealth Equity Services
Massachusetts
$2.29M +$522K +1,934 +30%
HSA
260
Hussman Strategic Advisors
Maryland
$2.27M +$2.27M +8,400 New
Nisa Investment Advisors
261
Nisa Investment Advisors
Missouri
$2.2M -$1.39M -5,162 -39%
VFA
262
Values First Advisors
Tennessee
$2.19M -$237K -879 -10%
Cetera Investment Advisers
263
Cetera Investment Advisers
Illinois
$2.16M +$877K +3,247 +68%
SP
264
SIH Partners
Delaware
$2.15M +$2.15M +7,959 New
M&T Bank
265
M&T Bank
New York
$2.12M -$200K -740 -9%
ClearBridge Investments
266
ClearBridge Investments
New York
$2.1M +$2.1M +7,777 New
GIBU
267
Gulf International Bank (UK)
United Kingdom
$1.99M -$645K -2,390 -25%
MIM
268
MetLife Investment Management
New Jersey
$1.97M -$2.43K -9 -0.1%
Twin Tree Management
269
Twin Tree Management
Texas
$1.91M +$1.91M +7,074 New
Stifel Financial
270
Stifel Financial
Missouri
$1.91M -$795K -2,944 -29%
Man Group
271
Man Group
United Kingdom
$1.91M -$2.51M -9,311 -57%
Simplex Trading
272
Simplex Trading
Illinois
$1.81M +$506K +1,875 +39%
PCA
273
Pallas Capital Advisors
Massachusetts
$1.79M +$871K +3,227 +95%
ALMGDA
274
AG2R La Mondiale Gestion d'Actifs
France
$1.77M +$1.77M +5,825 New
GIA
275
Gateway Investment Advisers
Ohio
$1.77M -$228K -843 -11%
9 10
11
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