Prothena Corp
PRTA
PRTA
178 hedge funds and large institutions have $451M invested in Prothena Corp in 2025 Q4 according to their latest regulatory filings, with 24 funds opening new positions, 62 increasing their positions, 56 reducing their positions, and 26 closing their positions.
New
Increased
Maintained
Reduced
Closed
more repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
more ownership
Funds ownership: →
more capital invested
Capital invested by funds: $ → $
less first-time investments, than exits
New positions opened: | Existing positions closed:
4% less funds holding
Funds holding: 186 → 178 (-8)
16% less call options, than puts
Call options by funds: $6.74M | Put options by funds: $8.02M
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Holders
178
Holding in Top 10
1
Calls
$6.74M
Puts
$8.02M
Top Buyers
| 1 | +$21.8M | |
| 2 | +$13.9M | |
| 3 | +$5.93M | |
| 4 |
BlackRock
New York
|
+$5.18M |
| 5 |
Morgan Stanley
New York
|
+$4.55M |
Top Sellers
| 1 | -$6.1M | |
| 2 | -$5.76M | |
| 3 | -$4.35M | |
| 4 |
Arrowstreet Capital
Boston,
Massachusetts
|
-$3.63M |
| 5 |
Fidelity Investments
Boston,
Massachusetts
|
-$3.56M |
