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Name Holding Trade Value Shares
Change
Change in
Stake
Primecap Management
1
Primecap Management
California
$45.4M +$21.8M +1,379,400 +87%
RCM
2
RA Capital Management
Massachusetts
$32.9M +$11.8M +750,000 +54%
PA
3
Perceptive Advisors
New York
$29.9M +$436K +27,614 +1%
DM
4
Deerfield Management
New York
$29M +$29.9M +1,895,535 New
Fidelity Investments
5
Fidelity Investments
Massachusetts
$22.1M
O
6
OrbiMed
New York
$16M -$21.9K -1,385 -0.1%
AllianceBernstein
7
AllianceBernstein
Tennessee
$14.1M +$13.2M +833,783 +969%
BBA
8
Baker Bros. Advisors
New York
$13.4M +$4.43M +280,701 +47%
Vanguard Group
9
Vanguard Group
Pennsylvania
$12.1M +$5.88M +372,878 +89%
Jennison Associates
10
Jennison Associates
New York
$11.5M +$11.8M +750,508 New
Franklin Resources
11
Franklin Resources
California
$11.4M +$9.34M +591,900 +391%
QF
12
QVT Financial
New York
$8.27M -$1.76M -111,484 -17%
BFA
13
BlackRock Fund Advisors
California
$7.83M +$1.66M +105,140 +26%
Adage Capital Partners
14
Adage Capital Partners
Massachusetts
$7.66M -$14.2M -900,000 -64%
T. Rowe Price Associates
15
T. Rowe Price Associates
Maryland
$7.24M +$7.46M +472,429 New
Alyeska Investment Group
16
Alyeska Investment Group
Illinois
$5.53M +$5.17M +327,652 +981%
BIT
17
BlackRock Institutional Trust
California
$5.24M +$3.42M +216,710 +173%
CC
18
Cannell & Co
New York
$4.96M +$5.11M +323,885 New
JP Morgan Chase
19
JP Morgan Chase
New York
$4.74M +$2.71M +171,825 +125%
State Street
20
State Street
Massachusetts
$4.51M +$1.25M +78,925 +37%
Citadel Advisors
21
Citadel Advisors
Florida
$4.22M +$4.35M +275,454 New
EAM
22
Eventide Asset Management
Massachusetts
$3.95M +$4.07M +258,100 New
NI
23
Numeric Investors
Massachusetts
$3.23M +$3.33M +210,882 New
Millennium Management
24
Millennium Management
New York
$3.06M +$3.15M +199,438 New
RPAM
25
Rhenman & Partners Asset Management
Sweden
$2.91M +$2.21M +140,000 +280%