TNDM icon

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 %
MG
226
Mather Group
Illinois
$6.61K +$3.35K +175 +103%
NFSG
227
Newbridge Financial Services Group
Florida
$6.13K -$4.6K -240 -43%
C
228
Covestor
United Kingdom
$6K +$21 +1 +0.3%
MPWT
229
MassMutual Private Wealth & Trust
Connecticut
$5.19K +$3.89K +203 +299%
BCV
230
Banque Cantonale Vaudoise
Switzerland
$5K +$5K +237 New
PFBT
231
Parkside Financial Bank & Trust
Missouri
$3.97K +$3.28K +171 +475%
HI
232
Harbour Investments
Wisconsin
$3.91K – – –
LC
233
Lindbrook Capital
California
$3.64K -$1.72K -90 -32%
PTC
234
Private Trust Company
Ohio
$3.55K +$958 +50 +37%
SO
235
Sierra Ocean
California
$2.97K +$2.97K +155 New
SPIA
236
Steward Partners Investment Advisory
New York
$2.49K – – –
TFA
237
Toth Financial Advisory
Virginia
$1.92K -$4.31K -225 -69%
FRA
238
Front Row Advisors
California
$1.92K – – –
CA
239
Continuum Advisory
Idaho
$1.92K – – –
IA
240
IFP Advisors
Florida
$1.84K +$19 +1 +1%
MCM
241
MAI Capital Management
Ohio
$1.5K -$211 -11 -12%
FDCDDQ
242
Federation des caisses Desjardins du Quebec
Quebec, Canada
$1.44K – – –
CWM
243
CarsonAllaria Wealth Management
Illinois
$1.44K – – –
SCM
244
Sterling Capital Management
North Carolina
$1.28K – – –
PWMG
245
Prestige Wealth Management Group
New Jersey
$1.21K +$671 +35 +125%
BCWM
246
Bartlett & Co Wealth Management
Ohio
$1.19K – – –
QC
247
Quent Capital
New York
$1.15K – – –
HFS
248
Hantz Financial Services
Michigan
$1K +$1K +35 New
FMII
249
Farmers & Merchants Investments Inc
Nebraska
$958 – – –
GSWM
250
Golden State Wealth Management
California
$786 – – –
8 9
10
11 12