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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 %
CB
126
Commerce Bank
Missouri
$609K +$93.5K +4,878 +18%
LSERS
127
Louisiana State Employees Retirement System
Louisiana
$592K -$17.2K -900 -3%
VI
128
Versor Investments
New York
$584K +$584K +30,500 New
Janus Henderson Group
129
Janus Henderson Group
United Kingdom
$575K – – –
Verition Fund Management
130
Verition Fund Management
Connecticut
$573K +$573K +29,918 New
State of Tennessee, Department of Treasury
131
State of Tennessee, Department of Treasury
Tennessee
$572K – – –
Comerica Bank
132
Comerica Bank
Texas
$569K +$33.3K +1,739 +6%
VRS
133
Virginia Retirement Systems
Virginia
$544K +$544K +28,400 New
Franklin Resources
134
Franklin Resources
California
$530K +$16.4K +857 +3%
Man Group
135
Man Group
United Kingdom
$523K +$523K +27,321 New
BC
136
Bayforest Capital
United Kingdom
$504K +$334K +17,436 +197%
Ensign Peak Advisors
137
Ensign Peak Advisors
Utah
$489K – – –
SAM
138
Shell Asset Management
Netherlands
$484K -$19.1K -1,000 -4%
HWM
139
HighMark Wealth Management
Minnesota
$482K – – –
YCM
140
Yousif Capital Management
Michigan
$479K -$7.61K -397 -2%
P
141
&Partners
Tennessee
$453K +$312K +15,946 +222%
SRL
142
Scientech Research LLC
New Jersey
$448K +$448K +23,372 New
Amundi
143
Amundi
France
$445K -$789K -44,687 -64%
ACM
144
Aquatic Capital Management
Illinois
$434K +$26.9K +1,402 +7%
Bessemer Group
145
Bessemer Group
New Jersey
$431K -$287 -15 -0.1%
AAM
146
Advisors Asset Management
Colorado
$430K +$31.9K +1,664 +8%
1CM
147
1492 Capital Management
Wisconsin
$430K +$430K +22,446 New
Mariner
148
Mariner
Kansas
$424K +$101K +5,264 +31%
Handelsbanken Fonder
149
Handelsbanken Fonder
Sweden
$422K – – –
CAPTRUST Financial Advisors
150
CAPTRUST Financial Advisors
North Carolina
$412K +$57.6K +3,004 +16%
4 5
6
7 8