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Prothena Corp
PRTA
PRTA
161 hedge funds and large institutions have $647M invested in Prothena Corp in 2025 Q1 according to their latest regulatory filings, with 16 funds opening new positions, 42 increasing their positions, 59 reducing their positions, and 24 closing their positions.
New
Increased
Maintained
Reduced
Closed
more call options, than puts
Call options by funds: $ | Put options by funds: $
more funds holding in top 10
Funds holding in top 10: →
less ownership
Funds ownership: →
less funds holding
Funds holding: →
13% less capital invested
Capital invested by funds: $741M → $647M (-$94.1M)
29% less repeat investments, than reductions
Existing positions increased: 42 | Existing positions reduced: 59
33% less first-time investments, than exits
New positions opened: 16 | Existing positions closed: 24
Holders
161
Holding in Top 10
3
Calls
$3.5M
Puts
$1.25M
Top Buyers
| 1 | +$4.35M | |
| 2 | +$2.6M | |
| 3 | +$1.29M | |
| 4 |
Jane Street
New York
|
+$1.09M |
| 5 |
Wellington Management Group
Boston,
Massachusetts
|
+$971K |
Top Sellers
| 1 | -$4.81M | |
| 2 | -$3.25M | |
| 3 | -$2.83M | |
| 4 |
RSCM
Rock Springs Capital Management
Baltimore,
Maryland
|
-$2.15M |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
-$1.9M |