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Name Holding Trade Value Shares
Change
Change in
Stake
EWM
1
Essex Woodlands Management
Texas
$81.4M
OM
2
Opaleye Management
Massachusetts
$33M
BlackRock
3
BlackRock
New York
$22.7M +$720K +53,384 +4%
Vanguard Group
4
Vanguard Group
Pennsylvania
$20.5M +$1.37M +101,245 +9%
DCM
5
Driehaus Capital Management
Illinois
$11.7M +$2.56M +190,076 +37%
DM
6
Deerfield Management
New York
$11.3M -$15.7M -1,163,797 -63%
Russell Investments Group
7
Russell Investments Group
United Kingdom
$10.2M +$5.81M +431,057 +239%
GGHC
8
Gilder Gagnon Howe & Co
New York
$9.52M +$116K +8,608 +2%
PCM
9
Perkins Capital Management
Minnesota
$9.29M -$504K -37,375 -6%
NCGI
10
Next Century Growth Investors
Minnesota
$8.85M -$52.8K -3,918 -0.7%
CAM
11
Cortina Asset Management
Wisconsin
$8.24M -$5.24M -388,573 -44%
Millennium Management
12
Millennium Management
New York
$7.7M +$5.58M +413,822 +900%
State Street
13
State Street
Massachusetts
$7.35M +$967K +71,752 +20%
RSCM
14
Rock Springs Capital Management
Maryland
$6.28M +$5.06M +375,000 New
AIC
15
AWM Investment Company
New York
$5.64M -$68.8K -5,100 -1%
CM
16
Castleark Management
Illinois
$5.43M +$4.37M +323,921 New
Deutsche Bank
17
Deutsche Bank
Germany
$5.42M +$1.45M +107,359 +50%
WRF
18
Waddell & Reed Financial
Kansas
$5.29M -$448K -33,200 -10%
Northern Trust
19
Northern Trust
Illinois
$5.17M +$301K +22,319 +8%
LSC
20
Lyon Street Capital
California
$5.04M +$1.26M +93,779 +45%
GPCM
21
Granite Point Capital Management
Massachusetts
$4.95M -$56.8K -4,210 -1%
EI
22
EAM Investors
California
$4.92M +$1.84M +136,453 +87%
CPIM
23
Columbia Partners Investment Management
Virginia
$4.79M +$407K +30,176 +12%
SST
24
S Squared Technology
New York
$4.73M -$270K -20,000 -7%
SPPAM
25
Summit Partners Public Asset Management
Massachusetts
$4.69M -$1.75M -129,498 -32%