Tandem Diabetes Care
TNDM
TNDM
250 hedge funds and large institutions have $909M invested in Tandem Diabetes Care in 2025 Q3 according to their latest regulatory filings, with 41 funds opening new positions, 74 increasing their positions, 97 reducing their positions, and 57 closing their positions.
New
Increased
Maintained
Reduced
Closed
more call options, than puts
Call options by funds: $ | Put options by funds: $
less funds holding
Funds holding: →
less ownership
Funds ownership: →
less repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
28% less first-time investments, than exits
New positions opened: 41 | Existing positions closed: 57
40% less capital invested
Capital invested by funds: $1.51B → $909M (-$598M)
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Holders
250
Holding in Top 10
1
Calls
$36.7M
Puts
$6.44M
Top Buyers
| 1 | +$22.7M | |
| 2 | +$14.9M | |
| 3 | +$12M | |
| 4 |
Barclays
London,
United Kingdom
|
+$7.56M |
| 5 |
Acadian Asset Management
Boston,
Massachusetts
|
+$6.79M |
Top Sellers
| 1 | -$32.4M | |
| 2 | -$27.1M | |
| 3 | -$24.4M | |
| 4 |
Brown Advisory
Baltimore,
Maryland
|
-$19.7M |
| 5 |
Capital World Investors
Los Angeles,
California
|
-$14.3M |
