Prothena Corporation plc

LSE:0Y3M Stock Report

Market Cap: US$382.2m

Prothena Ownership

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


Recent Insider Transactions

LSE:0Y3M Recent Insider Transactions by Companies or Individuals
DateValueNameEntityRoleSharesMax Price
06 May 25SellUS$50,839,807EcoR1 Capital, LLCCompany6,279,684US$8.36
14 Jan 25BuyUS$2,749,916William ScullyIndividual207,436US$15.91

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 0Y3M?
Owner TypeNumber of SharesOwnership Percentage
Hedge Funds5,304,5979.23%
Individual Insiders9,685,10416.9%
Institutions42,456,24173.9%

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


Top Shareholders

Top 25 shareholders own 96.78% of the company
OwnershipNameSharesCurrent ValueChange %Portfolio %
15%
FMR LLC
8,071,302US$57.3m0.05%no data
9.85%
EcoR1 Capital, LLC
5,304,597US$37.7m-54.2%2.37%
9.53%
Wellington Management Group LLP
5,130,876US$36.4m22.8%0.01%
9.32%
William Scully
5,019,289US$35.6m-9.7%no data
8.63%
Todd Fennell
4,645,147US$33.0m46.6%no data
7.51%
BlackRock, Inc.
4,042,281US$28.7m-1.94%no data
6.85%
T. Rowe Price Group, Inc.
3,685,708US$26.2m-3.58%no data
4.15%
Armistice Capital LLC
2,236,000US$15.9m35.5%0.44%
3.46%
State Street Global Advisors, Inc.
1,861,641US$13.2m11.2%no data
3.23%
Palo Alto Investors LP
1,737,964US$12.3m0%2.47%
2.61%
The Vanguard Group, Inc.
1,403,838US$10.0m11.5%no data
2.04%
Artal Group S.A.
1,099,840US$7.8m0%0.29%
1.79%
Geode Capital Management, LLC
964,308US$6.8m0.09%no data
1.61%
Dimensional Fund Advisors LP
864,833US$6.1m1.26%no data
1.4%
UBS Asset Management AG
752,795US$5.3m27.8%no data
1.39%
Federated Hermes, Inc.
746,177US$5.3m84.3%0.01%
1.28%
Boxer Capital Management, LLC
690,000US$4.9m0%0.52%
1.22%
Finepoint Capital LP
657,071US$4.7m51.6%0.59%
1.2%
Rock Springs Capital Management LP
644,601US$4.6m3.13%0.2%
1.07%
Morgan Stanley, Investment Banking and Brokerage Investments
573,493US$4.1m-4.05%no data
0.83%
Goldman Sachs Group, Investment Banking and Securities Investments
448,148US$3.2m0%no data
0.78%
Prosight Management, LP
418,122US$3.0m-13.5%1.05%
0.75%
Northern Trust Global Investments
404,496US$2.9m8.54%no data
0.65%
Candriam, Société En Commandite Par Actions
348,187US$2.5m0%0.01%
0.64%
Mariner, LLC
343,917US$2.4m6.41%no data

Company Analysis and Financial Data Status

DataLast Updated (UTC time)
Company Analysis2025/05/09 05:26
End of Day Share Price 2025/05/09 00:00
Earnings2025/03/31
Annual Earnings2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

PackageDataTimeframeExample US Source *
Company Financials10 years
  • Income statement
  • Cash flow statement
  • Balance sheet
Analyst Consensus Estimates+3 years
  • Forecast financials
  • Analyst price targets
Market Prices30 years
  • Stock prices
  • Dividends, Splits and Actions
Ownership10 years
  • Top shareholders
  • Insider trading
Management10 years
  • Leadership team
  • Board of directors
Key Developments10 years
  • Company announcements

* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Prothena Corporation plc is covered by 24 analysts. 9 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

AnalystInstitution
Geoffrey MeachamBarclays
Tazeen AhmadBofA Global Research
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