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Tandem Diabetes Care
TNDM

Overview Fund Activity

266 hedge funds and large institutions have $1.5B invested in Tandem Diabetes Care in 2025 Q2 according to their latest regulatory filings, with 40 funds opening new positions, 115 increasing their positions, 68 reducing their positions, and 41 closing their positions.

Holders
266
Holders Change
-6
Holders Change %
-2.21%
% of All Funds
3.57%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.03%
New
40
Increased
115
Reduced
68
Closed
41
Calls
$53.9M
Puts
$4.33M
Net Calls
+$49.6M
Net Calls Change
-$6.58M

Top Buyers

1
OAM
1
Ophir Asset Management
Australia
$24.4M
2
Goldman Sachs
2
Goldman Sachs
New York
$35.2M
3
Millennium Management
3
Millennium Management
New York
$18.1M
4
Two Sigma Investments
4
Two Sigma Investments
New York
$23M
5
Walleye Capital
5
Walleye Capital
New York
$10.6M

Top Sellers

1
PWAM
1
Park West Asset Management
California
$0
2
Fidelity Investments
2
Fidelity Investments
Massachusetts
$9.78M
3
FAM
3
Fred Alger Management
New York
$12.4M
4
Balyasny Asset Management
4
Balyasny Asset Management
Illinois
$4.3M
5
KCM
5
Kingdon Capital Management
New York
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Man Group
101
Man Group
United Kingdom
$1.4M 74,886 +47,565 +174%
New York State Teachers Retirement System (NYSTRS)
102
New York State Teachers Retirement System (NYSTRS)
New York
$1.27M 68,300 +100 +0.1%
Mirae Asset Global ETFs Holdings
103
Mirae Asset Global ETFs Holdings
Hong Kong
$1.19M 63,638 -10,775 -14%
DFCM
104
Dark Forest Capital Management
Puerto Rico
$1.14M 61,002 -9,126 -13%
CC
105
Centiva Capital
New York
$1.14M 61,001 +61,001 New
California State Teachers Retirement System (CalSTRS)
106
California State Teachers Retirement System (CalSTRS)
California
$1.13M 60,598 -639 -1%
MCM
107
Moore Capital Management
New York
$1.11M 59,726 -44,725 -43%
T. Rowe Price Associates
108
T. Rowe Price Associates
Maryland
$1.1M 59,203 +6,360 +12%
Canada Life
109
Canada Life
Manitoba, Canada
$1.05M 56,332 +3,054 +6%
Group One Trading
110
Group One Trading
Illinois
$1.04M 55,940 +4,480 +9%
OAM
111
Oppenheimer Asset Management
New York
$1.01M 54,041 -18,711 -26%
BC
112
Beaconlight Capital
New York
$996K 53,455 -166,302 -76%
Wells Fargo
113
Wells Fargo
California
$937K 50,281 -16,629 -25%
Thrivent Financial for Lutherans
114
Thrivent Financial for Lutherans
Minnesota
$913K 48,977 +736 +2%
Deutsche Bank
115
Deutsche Bank
Germany
$902K 48,373 -5,791 -11%
LCM
116
Legato Capital Management
California
$898K 48,185 +48,185 New
IIM
117
INTECH Investment Management
Florida
$882K 47,343 -3,136 -6%
CB
118
Commerce Bank
Missouri
$841K 45,102 +13,335 +42%
BCI
119
Brinker Capital Investments
Pennsylvania
$832K 44,611 -2,477 -5%
Natixis Advisors
120
Natixis Advisors
Massachusetts
$791K 42,412 -23,161 -35%
AQR Capital Management
121
AQR Capital Management
Connecticut
$764K 41,004 +28,935 +240%
SOADOR
122
State of Alaska Department of Revenue
Alaska
$739K 39,660 +3,269 +9%
MIM
123
MetLife Investment Management
New Jersey
$729K 39,091 – –
LPL Financial
124
LPL Financial
California
$698K 37,460 -15,812 -30%
VRS
125
Virginia Retirement Systems
Virginia
$688K 36,900 +8,500 +30%
3 4
5
6 7