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Alnylam Pharmaceuticals
ALNY

Overview Fund Activity

640 hedge funds and large institutions have $42.9B invested in Alnylam Pharmaceuticals in 2025 Q2 according to their latest regulatory filings, with 96 funds opening new positions, 253 increasing their positions, 213 reducing their positions, and 63 closing their positions.

Holders
640
Holders Change
+22
Holders Change %
+3.56%
% of All Funds
8.6%
Holding in Top 10
9
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-10%
% of All Funds
0.12%
New
96
Increased
253
Reduced
213
Closed
63
Calls
$122M
Puts
$147M
Net Calls
-$25M
Net Calls Change
-$60.4M

Top Buyers

1
Norges Bank
1
Norges Bank
Norway
$663M
2
Citadel Advisors
2
Citadel Advisors
Florida
$196M
3
Holocene Advisors
3
Holocene Advisors
New York
$195M
4
ClearBridge Investments
4
ClearBridge Investments
New York
$182M
5
Macquarie Group
5
Macquarie Group
Australia
$196M

Top Sellers

1
AQR Capital Management
1
AQR Capital Management
Connecticut
$61.3M
2
Baillie Gifford & Co
2
Baillie Gifford & Co
United Kingdom
$989M
3
Wellington Management Group
3
Wellington Management Group
Massachusetts
$677M
4
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$1.03B
5
Qube Research & Technologies (QRT)
5
Qube Research & Technologies (QRT)
United Kingdom
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Capital World Investors
1
Capital World Investors
California
$5.48B 16,805,007 +55,384 +0.3%
Fidelity Investments
2
Fidelity Investments
Massachusetts
$5.15B 15,806,521 +496,661 +3%
Vanguard Group
3
Vanguard Group
Pennsylvania
$4.34B 13,297,139 +240,534 +2%
BlackRock
4
BlackRock
New York
$3.25B 9,980,163 +420,781 +4%
Capital Research Global Investors
5
Capital Research Global Investors
California
$2.35B 7,191,656 +36,928 +0.5%
RP
6
Regeneron Pharmaceuticals
New York
$1.45B 4,444,445 – –
T. Rowe Price Investment Management
7
T. Rowe Price Investment Management
Maryland
$1.4B 4,281,279 -136,866 -3%
Dodge & Cox
8
Dodge & Cox
California
$1.04B 3,197,096 -154,666 -5%
State Street
9
State Street
Massachusetts
$1.03B 3,173,105 -193,478 -6%
T. Rowe Price Associates
10
T. Rowe Price Associates
Maryland
$1.03B 3,145,006 -360,162 -10%
Baillie Gifford & Co
11
Baillie Gifford & Co
United Kingdom
$989M 3,031,891 -625,716 -17%
Geode Capital Management
12
Geode Capital Management
Massachusetts
$780M 2,398,770 +75,936 +3%
OAG
13
Orbis Allan Gray
Bermuda
$692M 2,121,412 +486,489 +30%
Wellington Management Group
14
Wellington Management Group
Massachusetts
$677M 2,075,752 -535,234 -20%
JPMorgan Chase & Co
15
JPMorgan Chase & Co
New York
$672M 2,062,008 -156,864 -7%
Norges Bank
16
Norges Bank
Norway
$663M 2,032,680 +2,032,680 New
American Century Companies
17
American Century Companies
Missouri
$585M 1,793,846 +33,411 +2%
Invesco
18
Invesco
Georgia
$438M 1,341,694 +427,902 +47%
Bank of America
19
Bank of America
North Carolina
$410M 1,257,328 +192,755 +18%
Winslow Capital Management
20
Winslow Capital Management
Minnesota
$384M 1,177,439 -9,739 -0.8%
UBS AM
21
UBS AM
Illinois
$313M 958,336 +222,225 +30%
Legal & General Group
22
Legal & General Group
United Kingdom
$285M 872,771 -8,340 -0.9%
Northern Trust
23
Northern Trust
Illinois
$271M 831,777 -33,243 -4%
NL
24
Nuveen LLC
North Carolina
$253M 774,969 -108,405 -12%
Morgan Stanley
25
Morgan Stanley
New York
$251M 770,968 +129,203 +20%
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