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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 %
Zurich Cantonal Bank
151
Zurich Cantonal Bank
Switzerland
$411K +$67.1K +3,503 +20%
TRSOTSOK
152
Teachers Retirement System of the State of Kentucky
Kentucky
$408K – – –
CC
153
Chicago Capital
Illinois
$397K -$18.2M -949,881 -98%
PNC Financial Services Group
154
PNC Financial Services Group
Pennsylvania
$369K -$57.6K -3,004 -14%
MSRPS
155
Maryland State Retirement & Pension System
Maryland
$367K -$56.9K -2,970 -13%
ASRS
156
Arizona State Retirement System
Arizona
$360K -$2.84K -148 -0.8%
AB
157
Amalgamated Bank
New York
$360K -$8.59K -448 -2%
Cetera Investment Advisers
158
Cetera Investment Advisers
Illinois
$358K +$86.5K +4,515 +32%
State Board of Administration of Florida Retirement System
159
State Board of Administration of Florida Retirement System
Florida
$355K – – –
II
160
Inspire Investing
Idaho
$343K +$343K +17,893 New
BC
161
Bridgefront Capital
Texas
$340K +$340K +17,764 New
Neuberger Berman Group
162
Neuberger Berman Group
New York
$331K +$133K +6,919 +67%
SG Americas Securities
163
SG Americas Securities
New York
$313K +$246K +12,847 +366%
ECM
164
ExodusPoint Capital Management
New York
$306K -$4.56M -238,071 -94%
COPPSERS
165
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$301K +$32.5K +1,696 +12%
ProShare Advisors
166
ProShare Advisors
Maryland
$296K -$82.9K -4,325 -22%
OPERF
167
Oregon Public Employees Retirement Fund
Oregon
$287K -$9.58K -500 -3%
DT
168
Diversified Trust
Tennessee
$280K – – –
CWM
169
CIBC World Markets
New York
$279K +$161K +8,426 +137%
HSBC Holdings
170
HSBC Holdings
United Kingdom
$270K -$260K -13,635 -49%
PFSRSONJ
171
Police & Firemen's Retirement System of New Jersey
New Jersey
$266K – – –
KK
172
KLP Kapitalforvaltning
Norway
$259K – – –
TPSF
173
Texas Permanent School Fund
Texas
$237K +$237K +14,067 New
Victory Capital Management
174
Victory Capital Management
Texas
$235K -$10.6M -552,988 -98%
AQR Capital Management
175
AQR Capital Management
Connecticut
$230K -$35K -1,836 -13%
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