Castle Biosciences
CSTL
CSTL
193 hedge funds and large institutions have $1.06B invested in Castle Biosciences in 2025 Q4 according to their latest regulatory filings, with 43 funds opening new positions, 63 increasing their positions, 68 reducing their positions, and 18 closing their positions.
New
Increased
Maintained
Reduced
Closed
more first-time investments, than exits
New positions opened: | Existing positions closed:
more funds holding in top 10
Funds holding in top 10: →
more capital invested
Capital invested by funds: $ → $
more funds holding
Funds holding: →
1.66% more ownership
Funds ownership: 91.87% → 93.52% (+1.7%)
7% less repeat investments, than reductions
Existing positions increased: 63 | Existing positions reduced: 68
Holders
193
Holding in Top 10
2
Calls
$3.25M
Puts
–
Top Buyers
| 1 | +$68.2M | |
| 2 | +$21.2M | |
| 3 | +$9.83M | |
| 4 |
Wellington Management Group
Boston,
Massachusetts
|
+$7.05M |
| 5 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
+$6.91M |
Top Sellers
| 1 | -$20.8M | |
| 2 | -$13.9M | |
| 3 | -$10.6M | |
| 4 |
PHP
Parkman Healthcare Partners
Stamford,
Connecticut
|
-$10.5M |
| 5 |
Millennium Management
New York
|
-$8.58M |
