Prothena Corporation
PRTA | NASDAQ
$9.01
+$0.50 (+5.88%)
Sep 22, 2026, 11:50 AM ET · Market open
Institutional Ownership
Net OutflowTotal Institutions
193
Total Ownership
87.47%
Capital Flow
-$5.06M
Shares Change
-272.62K
Ownership Distribution
Institutions (87.47%)
Others (12.53%)
Institutional Sentiment
Overall: bullishEquity Sentiment & Activity
bullishNew Positions
29
Increased Positions
98
Reduced Positions
50
Closed Positions
25
New (29)
Increased (98)
Reduced (50)
Closed (25)
Options Sentiment & Activity
bullishPut/Call Ratio
0.474
Call Flow
336,800
Put Flow
159,500
Calls (68%)
Puts (32%)
Super Investors
| Super Investor / Fund | Ownership | Portfolio Weight | Shares | Market Value | |
|---|---|---|---|---|---|
| Renaissance Technologies LLC | 1.30% +14.83% | < 0.01% | 697.62K | 5.94M | |
| Tudor Investment Corp ET AL | 0.05% -0.11% | < 0.01% | 24.45K | 208.03K |
Top Shareholders
| Institution | Ownership | Portfolio Weight | Shares | Market Value | |
|---|---|---|---|---|---|
| FMR LLC | 14.06% +0.23% | < 0.01% +5.15% | 7.55M 0.00% | 73.4M +1.78% | |
| Rubric Capital Management LP | 9.31% +36.28% | 0.51% +22.58% | 5M +35.97% | 48.6M +38.39% | |
| Blackrock, Inc. | 8.65% +13.33% | < 0.01% +18.96% | 4.64M +13.07% | 45.14M +15.08% |
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