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Tandem Diabetes Care
TNDM

Overview Fund Activity

272 hedge funds and large institutions have $1.4B invested in Tandem Diabetes Care in 2025 Q1 according to their latest regulatory filings, with 39 funds opening new positions, 106 increasing their positions, 85 reducing their positions, and 78 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
272
Holders Change
-42
Holders Change %
-13.38%
% of All Funds
3.69%
Holding in Top 10
2
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-60%
% of All Funds
0.03%
New
39
Increased
106
Reduced
85
Closed
78
Calls
$61.6M
Puts
$5.47M
Net Calls
+$56.1M
Net Calls Change
-$50.2M

Top Buyers

1
SC
Sessa Capital
New York
+$85.6M
2
HRCM
Hood River Capital Management
Florida
+$19.8M
3
Balyasny Asset Management
Balyasny Asset Management
Illinois
+$14.7M
4
GKIM
GW&K Investment Management
Massachusetts
+$14.2M
5
PIM
Paradice Investment Management
Colorado
+$13.3M

Top Sellers

1
GGHC
Gilder Gagnon Howe & Co
New York
-$33.6M
2
BG
Bellevue Group
Switzerland
-$28.2M
3
Capital International Investors
Capital International Investors
California
-$25.9M
4
OAM
Oberweis Asset Management
Illinois
-$18.2M
5
CC
Chicago Capital
Illinois
-$18.2M
Name Holding Trade Value Shares
Change 		Shares
Change %
Connor, Clark & Lunn Investment Management (CC&L)
26
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$12.4M +$2.49M +129,926 +25%
Two Sigma Investments
27
Two Sigma Investments
New York
$12.3M -$4.21M -219,746 -26%
BCM
28
Brown Capital Management
Maryland
$11.3M -$977K -51,006 -8%
Charles Schwab
29
Charles Schwab
California
$10.9M -$616K -32,171 -5%
Barclays
30
Barclays
United Kingdom
$9.85M +$709K +37,032 +8%
SCM
31
Soleus Capital Management
Connecticut
$9.5M +$9.5M +496,039 New
KCM
32
Kingdon Capital Management
New York
$9.49M -$5.66M -295,318 -37%
Bank of America
33
Bank of America
North Carolina
$8.94M +$2.86M +149,024 +47%
BNP Paribas Financial Markets
34
BNP Paribas Financial Markets
France
$8.81M +$8.33M +434,979 +1,753%
Bank of New York Mellon
35
Bank of New York Mellon
New York
$7.81M -$560K -29,210 -7%
Tudor Investment Corp
36
Tudor Investment Corp
Connecticut
$7.77M +$4.53M +236,249 +140%
Principal Financial Group
37
Principal Financial Group
Iowa
$7.65M +$213K +11,103 +3%
Ameriprise
38
Ameriprise
Minnesota
$7.22M +$785K +42,206 +12%
FCM
39
Frontier Capital Management
Massachusetts
$7M +$1.78M +93,088 +34%
Aberdeen Group
40
Aberdeen Group
United Kingdom
$6.83M +$2.06M +107,354 +43%
SAM
41
Silvercrest Asset Management
New York
$6.63M -$9.01K -470 -0.1%
Envestnet Asset Management
42
Envestnet Asset Management
Illinois
$6.1M +$1.24M +64,467 +25%
NL
43
Nuveen LLC
North Carolina
$5.91M +$5.91M +308,315 New
DCM
44
DAFNA Capital Management
California
$5.64M +$1.36M +71,000 +32%
Renaissance Technologies
45
Renaissance Technologies
New York
$5.48M -$567K -29,600 -9%
EDRH
46
Edmond de Rothschild Holding
Switzerland
$4.84M +$4.84M +252,600 New
FLAM
47
First Light Asset Management
Minnesota
$4.7M -$898K -46,860 -16%
QCM
48
Quantinno Capital Management
New York
$4.63M +$3.64M +190,219 +369%
Invesco
49
Invesco
Georgia
$4.54M +$618K +32,232 +16%
JPMorgan Chase & Co
50
JPMorgan Chase & Co
New York
$4.48M -$3.04M -158,821 -40%
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