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Alnylam Pharmaceuticals

Name Holding Trade Value Shares
Change
Change in
Stake
Fidelity Investments
1
Fidelity Investments
Massachusetts
$804M +$6.18M +92,939 +0.7%
Wellington Management Group
2
Wellington Management Group
Massachusetts
$750M +$85.6M +1,288,123 +12%
Vanguard Group
3
Vanguard Group
Pennsylvania
$327M +$10.3M +154,674 +3%
Baillie Gifford & Co
4
Baillie Gifford & Co
United Kingdom
$212M +$43.4M +652,201 +24%
Capital World Investors
5
Capital World Investors
California
$122M
State Street
6
State Street
Massachusetts
$122M +$17.5M +262,783 +16%
BFA
7
BlackRock Fund Advisors
California
$115M +$7.46M +112,252 +7%
BIT
8
BlackRock Institutional Trust
California
$112M +$251K +3,770 +0.2%
UBS AM
9
UBS AM
Illinois
$104M -$17.9M -269,353 -14%
GGHC
10
Gilder Gagnon Howe & Co
New York
$88.8M -$4.17M -62,736 -4%
T. Rowe Price Associates
11
T. Rowe Price Associates
Maryland
$80.6M +$3.07M +46,237 +4%
BB
12
BB Biotech
Switzerland
$74.8M +$3.91M +58,839 +5%
SPC
13
Slate Path Capital
New York
$71.2M +$27.3M +410,000 +57%
Morgan Stanley
14
Morgan Stanley
New York
$67.7M -$1.2M -18,043 -2%
BRC
15
Blue Ridge Capital
New York
$67.5M
Jennison Associates
16
Jennison Associates
New York
$60.9M -$34.5M -519,088 -35%
Franklin Resources
17
Franklin Resources
California
$59.2M -$1.6M -24,102 -2%
RI
18
RTW Investments
New York
$54.4M +$19.5M +293,018 +51%
BM
19
Bridger Management
New York
$50M +$5.3M +79,691 +11%
VAM
20
Visium Asset Management
New York
$49.7M +$45.9M +690,948 +682%
Wells Fargo
21
Wells Fargo
California
$48.5M -$78.8K -1,185 -0.2%
Citadel Advisors
22
Citadel Advisors
Florida
$45.9M +$36.5M +549,198 +303%
1WCM
23
12 West Capital Management
New York
$43.7M +$2.99M +45,000 +7%
Goldman Sachs
24
Goldman Sachs
New York
$40.3M +$16.5M +248,739 +63%
AG
25
Artal Group
Luxembourg
$37.7M +$8.31M +125,000 +26%