TNDM icon

Tandem Diabetes Care
TNDM

Overview Fund Activity

268 hedge funds and large institutions have $1.51B invested in Tandem Diabetes Care in 2025 Q2 according to their latest regulatory filings, with 40 funds opening new positions, 116 increasing their positions, 69 reducing their positions, and 41 closing their positions.

Holders
268
Holders Change
-4
Holders Change %
-1.47%
% of All Funds
3.6%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.03%
New
40
Increased
116
Reduced
69
Closed
41
Calls
$54.4M
Puts
$4.81M
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 %
VRS
126
Virginia Retirement Systems
Virginia
$688K 36,900 +8,500 +30%
State of Tennessee, Department of Treasury
127
State of Tennessee, Department of Treasury
Tennessee
$675K 36,189 +6,353 +21%
Mirae Asset Global Investments
128
Mirae Asset Global Investments
South Korea
$672K 36,060 – –
Stifel Financial
129
Stifel Financial
Missouri
$662K 35,529 +234 +0.7%
US Bancorp
130
US Bancorp
Minnesota
$659K 35,360 -7,328 -17%
QT
131
Quantbot Technologies
New York
$623K 33,445 +33,445 New
Manulife (Manufacturers Life Insurance)
132
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$619K 33,201 +408 +1%
Teacher Retirement System of Texas
133
Teacher Retirement System of Texas
Texas
$589K 31,576 -889 -3%
FRM
134
Fox Run Management
Connecticut
$587K 31,516 +31,516 New
Assenagon Asset Management
135
Assenagon Asset Management
Luxembourg
$585K 31,403 +31,403 New
LSERS
136
Louisiana State Employees Retirement System
Louisiana
$580K 31,100 +200 +0.6%
CCIA
137
Campbell & Co Investment Adviser
Maryland
$561K 30,108 +30,108 New
Janus Henderson Group
138
Janus Henderson Group
United Kingdom
$556K 29,811 – –
HSBC Holdings
139
HSBC Holdings
United Kingdom
$554K 29,742 +15,598 +110%
Comerica Bank
140
Comerica Bank
Texas
$551K 29,554 -138 -0.5%
BCM
141
Bayesian Capital Management
New York
$529K 28,400 +28,400 New
SG Americas Securities
142
SG Americas Securities
New York
$517K 27,760 +11,407 +70%
Franklin Resources
143
Franklin Resources
California
$502K 26,950 -721 -3%
DTL
144
Dynamic Technology Lab
Singapore
$488K 26,143 +14,377 +122%
YCM
145
Yousif Capital Management
Michigan
$469K 25,145 +144 +0.6%
Bessemer Group
146
Bessemer Group
New Jersey
$467K 25,046 +2,537 +11%
AAM
147
Advisors Asset Management
Colorado
$466K 25,001 +2,541 +11%
Ensign Peak Advisors
148
Ensign Peak Advisors
Utah
$466K 24,982 -550 -2%
STA
149
Summit Trail Advisors
New York
$464K 24,880 +24,880 New
CAPTRUST Financial Advisors
150
CAPTRUST Financial Advisors
North Carolina
$462K 24,766 +3,249 +15%
4 5
6
7 8