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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
3.6%
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
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 Holding Trade Value Shares
Change 		Shares
Change %
JAM
276
Jupiter Asset Management
United Kingdom
– -$1.68M -87,815 Closed
MP
277
Mangrove Partners
Connecticut
– -$1.58M -82,428 Closed
Marshall Wace
278
Marshall Wace
United Kingdom
– -$1.35M -70,399 Closed
HSA
279
Hussman Strategic Advisors
Maryland
– -$1.21M -63,000 Closed
SCM
280
Semanteon Capital Management
Massachusetts
– -$1.06M -55,413 Closed
JC
281
JB Capital
Connecticut
– -$992K -51,778 Closed
First Trust Advisors
282
First Trust Advisors
Illinois
– -$764K -39,876 Closed
Janney Montgomery Scott
283
Janney Montgomery Scott
Pennsylvania
– -$737K -38,450 Closed
PCM
284
Prelude Capital Management
New York
– -$731K -38,159 Closed
LCM
285
Landscape Capital Management
New Jersey
– -$689K -35,942 Closed
CF
286
Corebridge Financial
Texas
– -$657K -34,290 Closed
VI
287
Versor Investments
New York
– -$584K -30,500 Closed
SRL
288
Scientech Research LLC
New Jersey
– -$448K -23,372 Closed
P
289
&Partners
Tennessee
– -$453K -23,142 Closed
CC
290
Chicago Capital
Illinois
– -$397K -20,726 Closed
CWM
291
CIBC World Markets
New York
– -$279K -14,571 Closed
AI
292
Atria Investments
North Carolina
– -$222K -11,569 Closed
Wolverine Trading
293
Wolverine Trading
Illinois
– -$212K -10,973 Closed
MML Investors Services
294
MML Investors Services
Massachusetts
– -$205K -10,718 Closed
Allianz Asset Management
295
Allianz Asset Management
Germany
– -$205K -10,700 Closed
MWA
296
MN Wealth Advisors
Kansas
– -$204K -10,623 Closed
AC
297
AXQ Capital
New Jersey
– -$193K -10,098 Closed
QCG
298
Quadrant Capital Group
Ohio
– -$174K -9,078 Closed
CCM
299
Coldstream Capital Management
Washington
– -$127K -6,651 Closed
Canada Pension Plan Investment Board
300
Canada Pension Plan Investment Board
Ontario, Canada
– -$111K -5,800 Closed
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