Prothena Ownership

Who are the major shareholders and have insiders been buying or selling?


Recent Insider Transactions

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.


Ownership Breakdown

What is the ownership structure of 0PT?
Owner TypeNumber of SharesOwnership Percentage
Individual Insiders3,846,8676.98%
Hedge Funds11,584,28021%
Institutions39,666,10872%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.


Top Shareholders

Top 25 shareholders own 92.65% of the company
OwnershipNameSharesCurrent ValueChange %Portfolio %
21.5%
EcoR1 Capital, LLC
11,584,280€230.3m0%7.27%
15%
FMR LLC
8,065,670€160.3m0.74%0.01%
7.88%
T. Rowe Price Group, Inc.
4,237,404€84.2m0.85%0.01%
7.17%
BlackRock, Inc.
3,857,079€76.7m3.72%no data
6.77%
Wellington Management Group LLP
3,639,429€72.3m-3%0.01%
6.63%
William Scully
3,566,481€70.9m0%no data
3.59%
State Street Global Advisors, Inc.
1,932,472€38.4m-44.4%no data
3.1%
Palo Alto Investors LP
1,666,378€33.1m0.18%4.33%
2.9%
Armistice Capital LLC
1,560,000€31.0m42.3%0.84%
2.18%
The Vanguard Group, Inc.
1,171,747€23.3m4.13%no data
1.91%
Janus Henderson Group plc
1,026,558€20.4m-21.6%0.01%
1.86%
Artal Group S.A.
1,001,360€19.9m0%0.54%
1.85%
Geode Capital Management, LLC
994,278€19.8m7.54%no data
1.6%
Dimensional Fund Advisors LP
861,584€17.1m-0.14%no data
1.28%
Tavistock Life Sciences
690,000€13.7m0%0.73%
1.23%
Morgan Stanley, Investment Banking and Brokerage Investments
659,886€13.1m14%no data
1.16%
Rock Springs Capital Management LP
625,048€12.4m0%0.4%
0.81%
Finepoint Capital LP
433,471€8.6m7.72%2.42%
0.68%
Northern Trust Global Investments
364,106€7.2m-8.35%no data
0.66%
Citadel Advisors LLC
353,153€7.0m50.3%0.01%
0.62%
Granahan Investment Management, LLC
335,660€6.7m0.52%0.28%
0.61%
Renaissance Technologies LLC
329,500€6.6m-15.5%0.01%
0.61%
Charles Schwab Investment Management, Inc.
327,139€6.5m2.58%no data
0.53%
Prosight Management, LP
286,926€5.7m68.3%1.77%
0.48%
Todd Fennell
258,723€5.1m0%no data