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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 %
QCM
326
Qsemble Capital Management
New York
– -$202K -5,606 Closed
TFO
327
Tarbox Family Office
California
– -$202K -5,601 Closed
RC
328
Roundview Capital
New Jersey
– -$201K -5,594 Closed
AAS
329
Avantax Advisory Services
Texas
– -$201K -5,589 Closed
AIM
330
Arcadia Investment Management
Michigan
– -$129K -3,584 Closed
Walleye Capital
331
Walleye Capital
New York
– -$75.6K -2,098 Closed
VWM
332
Venturi Wealth Management
Texas
– -$74.2K -2,059 Closed
PAS
333
Point72 Asia (Singapore)
Singapore
– -$32.4K -899 Closed
QL
334
Quarry LP
New York
– -$9.8K -272 Closed
RS
335
R Squared
Hong Kong
– -$9.73K -270 Closed
MA
336
MCF Advisors
Kentucky
– -$8.03K -223 Closed
RA
337
RiverPark Advisors
New York
– -$25.5K -217 Closed
UB
338
UMB Bank
Missouri
– -$4.97K -138 Closed
JFGIW
339
Johnson Financial Group Inc (Wisconsin)
Wisconsin
– -$4.89K -132 Closed
WT
340
Whittier Trust
California
– -$4.14K -115 Closed
LFA
341
LGT Financial Advisors
Texas
– -$3.21K -89 Closed
AT
342
Avalon Trust
New Mexico
– -$3.17K -88 Closed
Cohen & Steers
343
Cohen & Steers
New York
– -$2K -67 Closed
T
344
Transce3nd
Texas
– -$1.44K -40 Closed
FFO
345
Fortitude Family Office
Arizona
– -$756 -21 Closed
WA
346
Whipplewood Advisors
Colorado
– -$468 -13 Closed
BGAI
347
Bruce G. Allen Investments
Colorado
– -$288 -8 Closed
EC
348
Elequin Capital
New York
– -$216 -6 Closed
CFGS
349
Concourse Financial Group Securities
Alabama
– -$35 -1 Closed
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