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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 %
SMDAM
226
Sumitomo Mitsui DS Asset Management
Japan
$3.5M +$363K +1,346 +12%
MML Investors Services
227
MML Investors Services
Massachusetts
$3.49M +$591K +2,189 +20%
Daiwa Securities Group
228
Daiwa Securities Group
Japan
$3.49M +$95.9K +355 +3%
EFM
229
E Fund Management
China
$3.43M +$112K +413 +3%
PSC
230
Portman Square Capital
United Kingdom
$3.38M -$111K -410 -3%
GC
231
Guggenheim Capital
Illinois
$3.34M -$112K -416 -3%
VCM
232
Voleon Capital Management
California
$3.22M -$6.82M -25,267 -68%
Lazard Asset Management
233
Lazard Asset Management
New York
$3.21M -$3.32M -12,306 -51%
MFS
234
Mirabella Financial Services
United Kingdom
$3.18M +$324K +1,198 +11%
William Blair & Company
235
William Blair & Company
Illinois
$2.99M -$239K -884 -7%
EMPI
236
Elo Mutual Pension Insurance
Finland
$2.94M -$622K -2,303 -17%
Verition Fund Management
237
Verition Fund Management
Connecticut
$2.91M +$2.13M +7,876 +271%
CFB
238
Cullen/Frost Bankers
Texas
$2.89M +$21.1K +78 +0.7%
Bank of Montreal
239
Bank of Montreal
Ontario, Canada
$2.88M -$249K -923 -8%
AssetMark Inc
240
AssetMark Inc
California
$2.87M +$164K +608 +6%
BFM
241
Boothbay Fund Management
New York
$2.72M +$2.72M +10,090 New
SCI
242
S&CO Inc
Massachusetts
$2.71M +$1.16M +4,300 +75%
Nordea Investment Management
243
Nordea Investment Management
Sweden
$2.71M +$12.5K +47 +0.5%
TCM
244
Traynor Capital Management
Pennsylvania
$2.66M +$130K +483 +5%
SAM
245
Silvercrest Asset Management
New York
$2.65M +$1.33M +4,930 +101%
Mackenzie Financial
246
Mackenzie Financial
Ontario, Canada
$2.56M +$169K +626 +7%
FDCDDQ
247
Federation des caisses Desjardins du Quebec
Quebec, Canada
$2.55M +$92.1K +341 +4%
SCM
248
Suvretta Capital Management
New York
$2.53M +$2.53M +9,370 New
TAA
249
TB Alternative Assets
Cayman Islands
$2.48M +$2.48M +9,168 New
VPIM
250
Vanguard Personalized Indexing Management
California
$2.45M +$139K +514 +6%
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