Prothena Corp
PRTA
PRTA
187 hedge funds and large institutions have $416M invested in Prothena Corp in 2025 Q3 according to their latest regulatory filings, with 32 funds opening new positions, 57 increasing their positions, 61 reducing their positions, and 33 closing their positions.
New
Increased
Maintained
Reduced
Closed
more capital invested
Capital invested by funds: $ → $
more ownership
Funds ownership: →
less funds holding
Funds holding: →
less first-time investments, than exits
New positions opened: | Existing positions closed:
7% less repeat investments, than reductions
Existing positions increased: 57 | Existing positions reduced: 61
33% less funds holding in top 10
Funds holding in top 10: 3 → 2 (-1)
50% less call options, than puts
Call options by funds: $7.5M | Put options by funds: $15.1M
Holders
187
Holding in Top 10
2
Calls
$7.5M
Puts
$15.1M
Top Buyers
| 1 | +$11.8M | |
| 2 | +$7.1M | |
| 3 | +$5.03M | |
| 4 |
Point72 Asset Management
Stamford,
Connecticut
|
+$4.97M |
| 5 |
JP Morgan Chase
New York
|
+$4.68M |
Top Sellers
| 1 | -$14.6M | |
| 2 | -$4M | |
| 3 | -$3.75M | |
| 4 |
RSCM
Rock Springs Capital Management
Baltimore,
Maryland
|
-$3.59M |
| 5 |
AC
Armistice Capital
New York
|
-$3.17M |