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Prothena Corp PLC

8.36

-0.1800-2.11%

Post-market: 8.360.00000.00%19:30 EDT

Volume:675.84K

Turnover:5.73M

Market Cap:429.18M

PE:-10.03

High:8.62

Open:8.62

Low:8.35

Close:8.54

52wk High:11.80

52wk Low:7.73

Shares:51.34M

Float Shares:39.86M

Volume Ratio:1.27

T/O Rate:1.70%

Dividend:- -

Dividend Rate:- -

EPS(TTM):-0.8337

EPS(LYR):-4.5346

ROE:-14.39%

ROA:-10.67%

PB:1.50

PE(LYR):-1.84

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Overview Company News Filings

Prothena Chief Development Officer Chad Swanson Resigns Effective Oct. 9

Prothena 10% Owner William P. Scully Buys USD 890,874 of Common Shares

Prothena 10% Owner William P. Scully Buys USD 843,460 of Common Shares

Prothena Management to Join H.C. Wainwright Global Investment Conference Fireside Chat

Prothena 10% Owner William P. Scully Buys 27,000 Shares for $255,739

3 Growth Stocks With High Insider Ownership You Need To Watch

Simply Wall St.

Prothena 10% Owner William P. Scully Buys $439,430 of Common Shares

Prothena Files Initial Beneficial Ownership Statement for Todd W. Fennell

Analysts Offer Insights on Healthcare Companies: Gain Therapeutics (GANX) and Prothena (PRTA)

Prothena Files Initial Beneficial Ownership Statement for Todd W. Fennell

Prothena 10% Owner William P. Scully Buys $293,052 of Common Shares

Prothena Corporation PLC Reports Results for the Quarter Ended June 30 - Earnings Summary

Prothena Publishes Corporate Overview Presentation on Protein-Dysregulation Drug Pipeline

Prothena Q2 FY26 Net Loss Narrows to $18.6 Million; Revenue Drops to $1 Million

Prothena Corp Q2 EPS $0.36 Beats $(0.09) Estimate, Sales $1.010M Miss $28.295M Estimate

Benzinga Earnings

Prothena Q2 Net Income USD -18.583 Million

Prothena: May Earn $55 Mln Clinical Milestone Payment if Bristol Myers Squibb Decides to Advance Prx019 ; Bms Decision Expected Year End 2026

THOMSON REUTERS

Prothena Corporation PLC Expected to Post a Loss of 39 Cents a Share - Earnings Preview

Prothena General Counsel Michael J. Isaacs Disposes of Common Shares Worth $111,080.17

Press Release: Prothena to Report Second Quarter 2026 Financial Results on August 6

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Wainwright 28th Annual Global Investment Conference on Sept","market":"nz","thumbnail":null,"type":0,"news_type":0,"thumbnails":[],"rights":null,"property":[],"language":"en","translate_title":"","themeId":null,"theme_name":"","theme_type":"","isJumpTheme":false,"source_url":"https://api.refinitiv.com/data/news/v1/stories/urn:newsml:reuters.com:20260909:nNDL4jqcGs:1","is_publish_highlight":false,"source_rank":0,"column":"","sentiment":"0","news_top_title":null,"news_tag":"conferences","news_rank":0,"length":0,"strategy_id":0,"source":null,"symbols":["PRTA","BK4139"],"isVideo":false,"video":null,"gpt_icon":0},{"id":"2664802552","title":"Prothena 10% Owner William P. 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Scully bought 50,000 ordinary shares at a weighted average price of $8.79.His directly held stake rose ","market":"fut","thumbnail":null,"type":0,"news_type":0,"thumbnails":[],"rights":null,"property":[],"language":"en","translate_title":"","themeId":null,"theme_name":"","theme_type":"","isJumpTheme":false,"source_url":"https://api.refinitiv.com/data/news/v1/stories/urn:newsml:reuters.com:20260821:nNDL5wqPfp:1","is_publish_highlight":false,"source_rank":0,"column":"","sentiment":"1","news_top_title":"Prothena 10% Owner William P. Scully Buys $439,430 of Common Shares","news_tag":"shareholding,insiderTrades","news_rank":0,"length":0,"strategy_id":0,"source":null,"symbols":["PRTA","BK4139"],"isVideo":false,"video":null,"gpt_icon":0},{"id":"2660494061","title":"Prothena Files Initial Beneficial Ownership Statement for Todd W. 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Fennell.Fennell was reported as ","market":"fut","thumbnail":null,"type":0,"news_type":0,"thumbnails":[],"rights":null,"property":[],"language":"en","translate_title":"","themeId":null,"theme_name":"","theme_type":"","isJumpTheme":false,"source_url":"https://api.refinitiv.com/data/news/v1/stories/urn:newsml:reuters.com:20260818:nNDL69Gk7s:1","is_publish_highlight":false,"source_rank":0,"column":"","sentiment":"0","news_top_title":null,"news_tag":"","news_rank":0,"length":0,"strategy_id":0,"source":null,"symbols":["PRTA","BK4139"],"isVideo":false,"video":null,"gpt_icon":0},{"id":"2659123357","title":"Analysts Offer Insights on Healthcare Companies: Gain Therapeutics (GANX) and Prothena (PRTA)","url":"https://stock-news.laohu8.com/highlight/detail?id=2659123357","media":"TIPRANKS","labels":[],"top":-1,"itemType":null,"share":"https://ttm.financial/m/news/2659123357?lang=en_us&edition=fundamental","pubTime":"2026-08-15 00:10","pubTimestamp":1786723806,"startTime":"0","endTime":"0","summary":"Companies in the Healthcare sector have received a lot of coverage today as analysts weigh in on Gain Therapeutics (GANX) and Prothena (PRTA). 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Fennell, listed as a 10% owner, with a reportable event dated Aug. 6, 2026.Filing states no s","market":"us","thumbnail":null,"type":0,"news_type":0,"thumbnails":[],"rights":null,"property":[],"language":"en","translate_title":"","themeId":null,"theme_name":"","theme_type":"","isJumpTheme":false,"source_url":"https://api.refinitiv.com/data/news/v1/stories/urn:newsml:reuters.com:20260811:nNDL5NHZMp:1","is_publish_highlight":false,"source_rank":0,"column":"","sentiment":"0","news_top_title":null,"news_tag":"","news_rank":0,"length":0,"strategy_id":0,"source":null,"symbols":["BK4139","PRTA"],"isVideo":false,"video":null,"gpt_icon":0},{"id":"2658955042","title":"Prothena 10% Owner William P. 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