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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 %
QCM
51
Quantinno Capital Management
New York
$5.96M 319,659 +77,828 +32%
Tudor Investment Corp
52
Tudor Investment Corp
Connecticut
$5.81M 311,517 -93,775 -23%
DCM
53
DAFNA Capital Management
California
$5.48M 294,208 – –
Envestnet Asset Management
54
Envestnet Asset Management
Illinois
$5.18M 278,010 -40,520 -13%
AllianceBernstein
55
AllianceBernstein
Tennessee
$5.04M 270,339 +89,631 +50%
UBS AM
56
UBS AM
Illinois
$5.01M 268,903 +74,910 +39%
EDRH
57
Edmond de Rothschild Holding
Switzerland
$4.89M 262,600 +10,000 +4%
Capital Fund Management (CFM)
58
Capital Fund Management (CFM)
France
$4.89M 262,431 +223,574 +575%
LCG
59
Lisanti Capital Growth
New York
$4.73M 253,840 +253,840 New
Adage Capital Partners
60
Adage Capital Partners
Massachusetts
$4.66M 250,000 +250,000 New
SPS
61
Susquehanna Portfolio Strategies
Pennsylvania
$4.6M 246,989 +246,989 New
Balyasny Asset Management
62
Balyasny Asset Management
Illinois
$4.3M 230,934 -538,809 -70%
Public Sector Pension Investment Board (PSP Investments)
63
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$4.23M 227,104 +18,873 +9%
Invesco
64
Invesco
Georgia
$4.23M 226,789 -10,333 -4%
Verition Fund Management
65
Verition Fund Management
Connecticut
$4.07M 218,586 +188,668 +631%
SGA
66
Sector Gamma AS
Norway
$3.92M 210,523 +30,000 +17%
Bank of Montreal
67
Bank of Montreal
Ontario, Canada
$3.92M 210,332 +198,942 +1,747%
SCM
68
Soleus Capital Management
Connecticut
$3.73M 200,000 -296,039 -60%
SSA
69
Schonfeld Strategic Advisors
New York
$3.72M 199,756 +199,756 New
Russell Investments Group
70
Russell Investments Group
United Kingdom
$3.7M 198,713 +59,619 +43%
New York State Common Retirement Fund
71
New York State Common Retirement Fund
New York
$3.69M 197,775 – –
RhumbLine Advisers
72
RhumbLine Advisers
Massachusetts
$3.6M 193,219 +14,945 +8%
KBC Group
73
KBC Group
Belgium
$3.58M 191,837 -1,971 -1%
Fidelity International
74
Fidelity International
Bermuda
$3.57M 191,417 -1,077 -0.6%
1CM
75
1492 Capital Management
Wisconsin
$3.52M 188,754 +166,308 +741%
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