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Prothena Corp
PRTA
PRTA
185 hedge funds and large institutions have $457M invested in Prothena Corp in 2026 Q1 according to their latest regulatory filings, with 29 funds opening new positions, 68 increasing their positions, 50 reducing their positions, and 22 closing their positions.
New
Increased
Maintained
Reduced
Closed
more funds holding in top 10
Funds holding in top 10: →
more call options, than puts
Call options by funds: $ | Put options by funds: $
more repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
more first-time investments, than exits
New positions opened: | Existing positions closed:
2% more funds holding
Funds holding: 181 → 185 (+4)
1% more capital invested
Capital invested by funds: $452M → $457M (+$5.06M)
0.51% less ownership
Funds ownership: 87.78% → 87.27% (-0.51%)
Holders
185
Holding in Top 10
2
Calls
$3.61M
Puts
$2.48M
Top Buyers
| 1 | +$12.1M | |
| 2 | +$4.92M | |
| 3 | +$4.91M | |
| 4 |
PM
Penbrook Management
New York
|
+$2.49M |
| 5 |
MCM
Monimus Capital Management
Woodbridge,
New Jersey
|
+$2.12M |
Top Sellers
| 1 | -$9.72M | |
| 2 | -$4.37M | |
| 3 | -$4.22M | |
| 4 |
State Street
Boston,
Massachusetts
|
-$3.02M |
| 5 |
Jane Street
New York
|
-$2.94M |
