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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 %
EWA
251
EverSource Wealth Advisors
Alabama
$747 -$4.39K -229 -85%
BIA
252
Bell Investment Advisors
California
$690 – – –
AF
253
Allworth Financial
California
$672 -$778 -44 -54%
Northwestern Mutual Wealth Management
254
Northwestern Mutual Wealth Management
Wisconsin
$671 -$5.29K -276 -89%
S
255
Sachetta
Massachusetts
$671 – – –
HNB
256
Huntington National Bank
Ohio
$633 +$77 +4 +14%
EB
257
Eastern Bank
Massachusetts
$613 – – –
RIL
258
Rothschild Investment LLC
Illinois
$575 -$767 -40 -57%
BFS
259
Bare Financial Services
Pennsylvania
$556 +$556 +29 New
1IA
260
1620 Investment Advisors
Massachusetts
$479 +$479 +25 New
MCM
261
MV Capital Management
Maryland
$441 +$422 +22 +2,200%
CTC
262
Central Trust Company
Missouri
$384 – – –
SC
263
Stephens Consulting
Michigan
$384 +$384 +20 New
CIAM
264
Caitong International Asset Management
Hong Kong
$364 +$364 +19 New
SS
265
SBI Securities
Japan
$345 -$19 -1 -5%
JWA
266
JFS Wealth Advisors
Pennsylvania
$288 – – –
EWM
267
Evermay Wealth Management
Virginia
$173 – – –
LFG
268
Larson Financial Group
Missouri
$134 – – –
AWM
269
Abound Wealth Management
Tennessee
$115 – – –
WSFS
270
Wilmington Savings Fund Society
Delaware
$96 – – –
WCM
271
WealthTrak Capital Management
Virginia
$96 +$96 +5 New
TWD
272
True Wealth Design
Ohio
$20 +$20 +1 New
GGHC
273
Gilder Gagnon Howe & Co
New York
– -$33.6M -931,894 Closed
BG
274
Bellevue Group
Switzerland
– -$28.2M -782,456 Closed
Capital International Investors
275
Capital International Investors
California
– -$25.9M -718,038 Closed
9 10
11
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