Prothena Corp
PRTA
PRTA
188 hedge funds and large institutions have $254M invested in Prothena Corp in 2025 Q2 according to their latest regulatory filings, with 52 funds opening new positions, 54 increasing their positions, 40 reducing their positions, and 23 closing their positions.
New
Increased
Maintained
Reduced
Closed
more first-time investments, than exits
New positions opened: | Existing positions closed:
more repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
more funds holding
Funds holding: →
more call options, than puts
Call options by funds: $ | Put options by funds: $
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
19.48% less ownership
Funds ownership: 97.07% → 77.59% (-19%)
61% less capital invested
Capital invested by funds: $647M → $254M (-$393M)
Holders
188
Holding in Top 10
3
Calls
$6.7M
Puts
$6.34M
Top Buyers
| 1 | +$20.5M | |
| 2 | +$6.42M | |
| 3 | +$6.18M | |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$5.51M |
| 5 |
RC
Rangeley Capital
New Canaan,
Connecticut
|
+$4.34M |
Top Sellers
| 1 | -$143M | |
| 2 | -$30.9M | |
| 3 | -$20.6M | |
| 4 |
SL
Siren LLC
Greenwich,
Connecticut
|
-$15.9M |
| 5 |
BCM
Boxer Capital Management
San Diego,
California
|
-$8.54M |
