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Tandem Diabetes Care

Name Holding Trade Value Shares
Change
Change in
Stake
BlackRock
1
BlackRock
New York
$448M +$78.9M +1,890,422 +20%
Vanguard Group
2
Vanguard Group
Pennsylvania
$297M +$13.6M +325,432 +5%
Capital World Investors
3
Capital World Investors
California
$148M
State Street
4
State Street
Massachusetts
$104M +$13.8M +331,586 +15%
ACH
5
ArrowMark Colorado Holdings
Colorado
$101M -$17.9M -429,328 -15%
FAM
6
Fred Alger Management
New York
$87.6M +$28.2M +677,036 +45%
Jennison Associates
7
Jennison Associates
New York
$79.4M -$24.5M -586,498 -23%
Citadel Advisors
8
Citadel Advisors
Florida
$72.9M +$51.8M +1,241,673 +219%
CIP
9
Champlain Investment Partners
Vermont
$65.7M +$4.84M +115,970 +8%
BG
10
Bellevue Group
Switzerland
$62.2M -$20.4M -488,621 -24%
Geode Capital Management
11
Geode Capital Management
Massachusetts
$60.8M +$18M +431,532 +40%
Ameriprise
12
Ameriprise
Minnesota
$59.6M +$28.7M +688,746 +87%
Janus Henderson Group
13
Janus Henderson Group
$58.4M -$31.3M -750,622 -34%
GKIM
14
GW&K Investment Management
Massachusetts
$54.1M +$1.55M +37,202 +3%
Jacobs Levy Equity Management
15
Jacobs Levy Equity Management
New Jersey
$50.1M +$1.04M +24,946 +2%
SIMG
16
Stephens Investment Management Group
Texas
$45.8M +$7.24M +173,660 +18%
Two Sigma Investments
17
Two Sigma Investments
New York
$45.7M +$4.72M +113,187 +11%
Two Sigma Advisers
18
Two Sigma Advisers
New York
$45.6M +$2.28M +54,700 +5%
Millennium Management
19
Millennium Management
New York
$42.5M +$1.21M +28,999 +3%
GGHC
20
Gilder Gagnon Howe & Co
New York
$41.4M +$5.48M +131,245 +15%
Morgan Stanley
21
Morgan Stanley
New York
$41.1M -$15.8M -378,734 -27%
DCM
22
Driehaus Capital Management
Illinois
$38.5M -$15.1M -362,193 -27%
BCM
23
Brown Capital Management
Maryland
$36.8M -$1.67M -40,112 -4%
NCGI
24
Next Century Growth Investors
Minnesota
$36.8M +$2.57M +61,491 +7%
Fidelity Investments
25
Fidelity Investments
Massachusetts
$36M -$6.56M -157,259 -15%