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Prothena Corporation PLC
PRTAAdd to Watchlist
8.930USD
+0.440+5.18%
Close 06/18, 16:00（ET）Quotes delayed by 15 min
480.73MMarket Cap
LossP/E TTM
Shareholding Stats
Updated: Sun, May 10
Updated: Sun, May 10
Shareholders
Shareholder Types
Shareholders
Shareholders
Proportion
Fidelity Management & Research Company LLC
14.42%
Scully (William P)
10.09%
Fennell (Todd W.)
8.59%
Rubric Capital Management LP
7.02%
BlackRock Institutional Trust Company, N.A.
6.35%
Other
53.52%
Shareholders
Shareholders
Proportion
Fidelity Management & Research Company LLC
14.42%
Scully (William P)
10.09%
Fennell (Todd W.)
8.59%
Rubric Capital Management LP
7.02%
BlackRock Institutional Trust Company, N.A.
6.35%
Other
53.52%
Shareholder Types
Shareholders
Proportion
Investment Advisor
36.50%
Hedge Fund
28.33%
Investment Advisor/Hedge Fund
21.93%
Individual Investor
20.07%
Research Firm
6.13%
Pension Fund
0.19%
Bank and Trust
0.16%
Venture Capital
0.10%
Insurance Company
0.02%
Institutional Shareholding
Updated: Wed, Apr 1
Updated: Wed, Apr 1
Reporting Period
No. of institutions
Shares Held
Proportion
Change
2026Q1
436
50.39M
96.24%
-14.52M
2025Q4
439
43.35M
80.52%
-19.70M
2025Q3
450
41.85M
77.74%
-15.20M
2025Q2
460
51.33M
95.35%
-19.91M
2025Q1
472
64.29M
119.45%
-7.39M
2024Q4
479
65.24M
121.19%
+239.99K
2024Q3
476
59.39M
110.43%
-5.39M
2024Q2
479
58.48M
108.76%
-4.67M
2024Q1
472
60.86M
113.29%
-264.94K
2023Q4
474
56.64M
105.77%
-2.21M
View more
Shareholder Activity
Name
Shares Held
Proportion
Change
Chg %
Date
Fidelity Management & Research Company LLC
7.55M
14.03%
-350.00K
-4.43%
Dec 31, 2025
Scully (William P)
5.28M
9.81%
-70.00K
-1.31%
Sep 30, 2025
Fennell (Todd W.)
4.50M
8.35%
+145.00K
+3.33%
Sep 30, 2025
Rubric Capital Management LP
3.68M
6.83%
+2.14M
+138.73%
Dec 31, 2025
BlackRock Institutional Trust Company, N.A.
3.33M
6.18%
+357.36K
+12.04%
Dec 31, 2025
State Street Investment Management (US)
2.27M
4.21%
+1.37M
+151.69%
Dec 31, 2025
D. E. Shaw & Co., L.P.
1.68M
3.12%
+365.95K
+27.82%
Dec 31, 2025
Armistice Capital LLC
1.50M
2.79%
-324.00K
-17.76%
Dec 31, 2025
Adar1 Capital Management LLC
1.46M
2.71%
-11.33K
-0.77%
Dec 31, 2025
View more
Related ETFs
Updated: Sat, Dec 6
Updated: Sat, Dec 6
Name
Proportion
Virtus LifeSci Biotech Clinical Trials ETF
1.44%
iShares Neuroscience and Healthcare ETF
0.78%
Invesco NASDAQ Future Gen 200 ETF
0.7%
Federated Hermes MDT Small Cap Core ETF
0.62%
ALPS Medical Breakthroughs ETF
0.24%
ProShares Ultra Nasdaq Biotechnology
0.07%
Invesco Nasdaq Biotechnology ETF
0.06%
Avantis US Small Cap Equity ETF
0.04%
iShares Biotechnology ETF
0.04%
WisdomTree US SmallCap Fund
0.03%
View more
Virtus LifeSci Biotech Clinical Trials ETF
Proportion1.44%
iShares Neuroscience and Healthcare ETF
Proportion0.78%
Invesco NASDAQ Future Gen 200 ETF
Proportion0.7%
Federated Hermes MDT Small Cap Core ETF
Proportion0.62%
ALPS Medical Breakthroughs ETF
Proportion0.24%
ProShares Ultra Nasdaq Biotechnology
Proportion0.07%
Invesco Nasdaq Biotechnology ETF
Proportion0.06%
Avantis US Small Cap Equity ETF
Proportion0.04%
iShares Biotechnology ETF
Proportion0.04%
WisdomTree US SmallCap Fund
Proportion0.03%
