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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 %
FAM
26
Fred Alger Management
New York
$12.4M -$14.7M -786,894 -54%
NL
27
Nuveen LLC
North Carolina
$11.7M +$5.97M +320,182 +104%
Charles Schwab
28
Charles Schwab
California
$11.5M +$873K +46,850 +8%
Walleye Capital
29
Walleye Capital
New York
$10.6M +$10.6M +567,223 New
Barclays
30
Barclays
United Kingdom
$10.6M +$989K +53,066 +10%
JPMorgan Chase & Co
31
JPMorgan Chase & Co
New York
$10.5M +$6.12M +328,489 +141%
BCM
32
Brown Capital Management
Maryland
$10.3M -$742K -39,807 -7%
Royal Bank of Canada
33
Royal Bank of Canada
Ontario, Canada
$10.2M +$6.3M +337,876 +160%
Bank of America
34
Bank of America
North Carolina
$10.2M +$1.47M +78,774 +17%
AG
35
Algert Global
California
$9.9M +$5.99M +321,594 +154%
Fidelity Investments
36
Fidelity Investments
Massachusetts
$9.78M -$17M -912,401 -63%
Ameriprise
37
Ameriprise
Minnesota
$7.81M +$581K +31,150 +8%
ECM
38
ExodusPoint Capital Management
New York
$7.78M +$7.48M +401,322 +2,510%
Prudential Financial
39
Prudential Financial
New Jersey
$7.7M +$4.24M +210,740 +122%
Bank of New York Mellon
40
Bank of New York Mellon
New York
$7.44M -$158K -8,479 -2%
Principal Financial Group
41
Principal Financial Group
Iowa
$7.37M -$78.7K -4,224 -1%
TI
42
Trexquant Investment
Connecticut
$6.87M +$6.87M +368,530 New
FCM
43
Frontier Capital Management
Massachusetts
$6.79M -$20.1K -1,078 -0.3%
BNP Paribas Financial Markets
44
BNP Paribas Financial Markets
France
$6.75M -$1.83M -97,920 -21%
Acadian Asset Management
45
Acadian Asset Management
Massachusetts
$6.68M +$2.34M +125,644 +54%
Aberdeen Group
46
Aberdeen Group
United Kingdom
$6.64M – – –
Citadel Advisors
47
Citadel Advisors
Florida
$6.58M +$4.45M +238,925 +210%
SAM
48
Silvercrest Asset Management
New York
$6.45M +$1.21K +65 +0%
Renaissance Technologies
49
Renaissance Technologies
New York
$6.38M +$1.05M +56,200 +20%
D.E. Shaw & Co
50
D.E. Shaw & Co
New York
$6.31M +$6.31M +338,668 New
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