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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.

New
Increased
Maintained
Reduced
Closed
Holders
268
Holders Change
-4
Holders Change %
-1.47%
% of All Funds
3.59%
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
Ophir Asset Management
Australia
+$24.4M
2
Goldman Sachs
Goldman Sachs
New York
+$21.9M
3
Millennium Management
Millennium Management
New York
+$13.8M
4
Two Sigma Investments
Two Sigma Investments
New York
+$11M
5
Walleye Capital
Walleye Capital
New York
+$10.6M

Top Sellers

1
PWAM
Park West Asset Management
California
-$21.5M
2
Fidelity Investments
Fidelity Investments
Massachusetts
-$17M
3
FAM
Fred Alger Management
New York
-$14.7M
4
Balyasny Asset Management
Balyasny Asset Management
Illinois
-$10M
5
KCM
Kingdon Capital Management
New York
-$9.49M
Name Holding Trade Value Shares
Change 		Shares
Change %
VRS
126
Virginia Retirement Systems
Virginia
$688K +$158K +8,500 +30%
State of Tennessee, Department of Treasury
127
State of Tennessee, Department of Treasury
Tennessee
$675K +$118K +6,353 +21%
Mirae Asset Global Investments
128
Mirae Asset Global Investments
South Korea
$672K – – –
Stifel Financial
129
Stifel Financial
Missouri
$662K +$4.36K +234 +0.7%
US Bancorp
130
US Bancorp
Minnesota
$659K -$137K -7,328 -17%
QT
131
Quantbot Technologies
New York
$623K +$623K +33,445 New
Manulife (Manufacturers Life Insurance)
132
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$619K +$7.61K +408 +1%
Teacher Retirement System of Texas
133
Teacher Retirement System of Texas
Texas
$589K -$16.6K -889 -3%
FRM
134
Fox Run Management
Connecticut
$587K +$587K +31,516 New
Assenagon Asset Management
135
Assenagon Asset Management
Luxembourg
$585K +$585K +31,403 New
LSERS
136
Louisiana State Employees Retirement System
Louisiana
$580K +$3.73K +200 +0.6%
CCIA
137
Campbell & Co Investment Adviser
Maryland
$561K +$561K +30,108 New
Janus Henderson Group
138
Janus Henderson Group
United Kingdom
$556K – – –
HSBC Holdings
139
HSBC Holdings
United Kingdom
$554K +$291K +15,598 +110%
Comerica Bank
140
Comerica Bank
Texas
$551K -$2.57K -138 -0.5%
BCM
141
Bayesian Capital Management
New York
$529K +$529K +28,400 New
SG Americas Securities
142
SG Americas Securities
New York
$517K +$212K +11,407 +70%
Franklin Resources
143
Franklin Resources
California
$502K -$13.4K -721 -3%
DTL
144
Dynamic Technology Lab
Singapore
$488K +$268K +14,377 +122%
YCM
145
Yousif Capital Management
Michigan
$469K +$2.68K +144 +0.6%
Bessemer Group
146
Bessemer Group
New Jersey
$467K +$47.3K +2,537 +11%
AAM
147
Advisors Asset Management
Colorado
$466K +$47.4K +2,541 +11%
Ensign Peak Advisors
148
Ensign Peak Advisors
Utah
$466K -$10.3K -550 -2%
STA
149
Summit Trail Advisors
New York
$464K +$464K +24,880 New
CAPTRUST Financial Advisors
150
CAPTRUST Financial Advisors
North Carolina
$462K +$60.6K +3,249 +15%
4 5
6
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