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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 %
OAM
276
Oberweis Asset Management
Illinois
– -$18.2M -506,600 Closed
Point72 Asset Management
277
Point72 Asset Management
Connecticut
– -$17.8M -495,311 Closed
TI
278
Trexquant Investment
Connecticut
– -$7.61M -211,206 Closed
NCGI
279
Next Century Growth Investors
Minnesota
– -$7.27M -201,839 Closed
4A
280
4D Advisors
California
– -$7.2M -200,000 Closed
FGP
281
Freestone Grove Partners
California
– -$6.52M -181,124 Closed
LCG
282
Lisanti Capital Growth
New York
– -$4.27M -118,550 Closed
Assenagon Asset Management
283
Assenagon Asset Management
Luxembourg
– -$3.54M -98,231 Closed
CSS
284
Cubist Systematic Strategies
Connecticut
– -$3.39M -93,987 Closed
BPC
285
Banque Pictet & Cie
Switzerland
– -$3.14M -87,286 Closed
M&T Bank
286
M&T Bank
New York
– -$2.1M -58,170 Closed
SFI
287
Susquehanna Fundamental Investments
Pennsylvania
– -$1.86M -51,703 Closed
JF
288
Jump Financial
Illinois
– -$1.36M -37,710 Closed
IQI
289
Integrated Quantitative Investments
Washington
– -$1.15M -31,900 Closed
Jane Street
290
Jane Street
New York
– -$1.13M -31,251 Closed
Cambridge Investment Research Advisors
291
Cambridge Investment Research Advisors
Iowa
– -$863K -23,953 Closed
BMSSC
292
B. Metzler seel. Sohn & Co
Germany
– -$788K -21,870 Closed
LCM
293
Legato Capital Management
California
– -$732K -20,335 Closed
BIAS
294
Beacon Investment Advisory Services
New Jersey
– -$681K -18,905 Closed
CCM
295
Connective Capital Management
California
– -$611K -16,960 Closed
GC
296
Guggenheim Capital
Illinois
– -$580K -16,107 Closed
YIH
297
Y-Intercept (HK)
Hong Kong
– -$510K -14,147 Closed
EP
298
Edgestream Partners
New Jersey
– -$461K -12,796 Closed
MOACM
299
Mutual of America Capital Management
New York
– -$358K -9,949 Closed
SPA
300
Sherbrooke Park Advisers
New York
– -$332K -9,225 Closed
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