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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 %
IEFM
176
IQ EQ Fund Management
Ireland
$227K – – –
DTL
177
Dynamic Technology Lab
Singapore
$225K +$225K +11,766 New
PAS
178
Park Avenue Securities
New York
$224K +$53.5K +2,794 +31%
JFG
179
Jefferies Financial Group
New York
$224K +$48.1K +2,510 +27%
AI
180
Atria Investments
North Carolina
$222K +$28.1K +1,468 +15%
Bank of Montreal
181
Bank of Montreal
Ontario, Canada
$218K +$26.6K +1,386 +14%
Corient Private Wealth
182
Corient Private Wealth
Florida
$216K +$65.6K +3,425 +44%
AWM
183
Apollon Wealth Management
South Carolina
$212K -$71.6K -3,738 -25%
Wolverine Trading
184
Wolverine Trading
Illinois
$212K +$212K +10,973 New
BHCM
185
Brevan Howard Capital Management
Jersey
$207K -$806K -42,062 -80%
Allianz Asset Management
186
Allianz Asset Management
Germany
$205K +$205K +10,700 New
MML Investors Services
187
MML Investors Services
Massachusetts
$205K +$46.7K +2,442 +30%
MWA
188
MN Wealth Advisors
Kansas
$204K -$140K -7,331 -41%
AC
189
AXQ Capital
New Jersey
$193K +$193K +10,098 New
Osaic Holdings
190
Osaic Holdings
Arizona
$175K +$65.2K +3,405 +59%
QCG
191
Quadrant Capital Group
Ohio
$174K +$62.8K +3,278 +57%
A
192
AlphaQuest
New York
$164K +$146K +7,630 +820%
Public Employees Retirement Association of Colorado
193
Public Employees Retirement Association of Colorado
Colorado
$147K – – –
VanEck Associates
194
VanEck Associates
New York
$142K +$47.9K +2,497 +51%
AIP
195
Ameritas Investment Partners
Nebraska
$132K – – –
CCM
196
Coldstream Capital Management
Washington
$127K +$8.93K +466 +8%
Canada Pension Plan Investment Board
197
Canada Pension Plan Investment Board
Ontario, Canada
$111K -$213K -11,100 -66%
SOW
198
State of Wyoming
Wyoming
$85.6K +$28.2K +1,471 +49%
FFA
199
Farther Finance Advisors
California
$77.1K +$6.56K +350 +9%
BIG
200
Brooklyn Investment Group
New York
$65.1K +$52.5K +2,741 +418%
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8
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