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Prothena (PRTA) News Today

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$9.39 -0.06 (-0.63%)
Closing price 08/24/2026 04:00 PM Eastern
Extended Trading
$9.48 +0.09 (+0.96%)
As of 05:37 AM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Prothena Latest News

Prothena Corporation plc (NASDAQ:PRTA) Receives Consensus Recommendation of "Moderate Buy" from Brokerages
August 24 at 4:28 AM  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/prothena-corporation-plc-nasdaqprta-receives-consensus-recommendation-of-moderate-buy-from-brokerages-2026-08-24/
Prothena (NASDAQ:PRTA) Major Shareholder William Scully Purchases 50,000 Shares
August 22 at 7:36 AM  |  insidertrades.comhttps://www.insidertrades.com/alerts/nasdaq-prta-insider-buying-and-selling-2026-08-22/
Prothena (NASDAQ:PRTA) Major Shareholder Buys 50,000 Shares of Stock
August 21, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/prothena-nasdaqprta-major-shareholder-buys-50000-shares-of-stock-2026-08-21/
Prothena (NASDAQ:PRTA) Stock Crosses Below 200-Day Moving Average - Here's What Happened
August 19, 2026  |  americanbankingnews.comhttps://www.americanbankingnews.com/?p=30969366
Prothena (NASDAQ:PRTA) Shares Pass Below Two Hundred Day Moving Average - Should You Sell?
August 19, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/prothena-nasdaqprta-shares-pass-below-two-hundred-day-moving-average-should-you-sell-2026-08-19/
HC Wainwright Issues Positive Estimate for Prothena Earnings
August 11, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/hc-wainwright-issues-positive-estimate-for-prothena-earnings-2026-08-11/
RBC Capital Keeps Their Hold Rating on Prothena (PRTA)
August 8, 2026  |  theglobeandmail.comhttps://www.theglobeandmail.com/investing/markets/markets-news/Tipranks/3735104/rbc-capital-keeps-their-hold-rating-on-prothena-prta/
Prothena (NASDAQ:PRTA) Announces Quarterly Earnings Results, Beats Expectations By $0.03 EPS
August 6, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/prothena-nasdaqprta-announces-quarterly-earnings-results-beats-expectations-by-003-eps-2026-08-06/
Prothena: Q2 Earnings Snapshot
August 6, 2026  |  chron.comhttps://www.chron.com/business/article/prothena-q2-earnings-snapshot-22378067.php
Prothena Reports Second Quarter 2026 Financial Results and Business Highlights
August 6, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260806855960/en/prothena-reports-second-quarter-2026-financial-results-and-business-highlights/
Renaissance Technologies LLC Has $5.91 Million Stock Position in Prothena Corporation plc $PRTA
August 6, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/filing-renaissance-technologies-llc-has-591-million-stock-position-in-prothena-corporation-plc-prta-2026-08-06/
Prothena (NASDAQ:PRTA) Insider Anne Evans Kingston Sells 7,662 Shares of Stock
July 31, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/prothena-nasdaqprta-insider-anne-evans-kingston-sells-7662-shares-of-stock-2026-07-30/
Prothena (NASDAQ:PRTA) General Counsel Michael John Isaacs Sells 8,386 Shares
July 31, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/prothena-nasdaqprta-general-counsel-michael-john-isaacs-sells-8386-shares-2026-07-30/
Prothena (NASDAQ:PRTA) Insider Sells $64,897.14 in Stock
July 31, 2026  |  insidertrades.comhttps://www.insidertrades.com/alerts/nasdaq-prta-insider-buying-and-selling-2026-07-31/
Prothena to Report Second Quarter 2026 Financial Results on August 6
July 30, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/healthcare/articles/prothena-report-second-quarter-2026-200500445.html
Prothena Corporation plc (NASDAQ:PRTA) Receives Average Rating of "Moderate Buy" from Analysts
July 30, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/prothena-corporation-plc-nasdaqprta-receives-average-rating-of-moderate-buy-from-analysts-2026-07-30/
Prothena Corporation plc $PRTA Shares Purchased by ADAR1 Capital Management LLC
July 29, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/filing-prothena-corporation-plc-prta-shares-purchased-by-adar1-capital-management-llc-2026-07-29/
Rubric Capital Management LP Has $48.60 Million Position in Prothena Corporation plc $PRTA
July 28, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/filing-rubric-capital-management-lp-has-4860-million-position-in-prothena-corporation-plc-prta-2026-07-28/
Prothena (PRTA) Expected to Announce Quarterly Earnings on Monday
July 27, 2026  |  marketbeat.comhttps://www.marketbeat.com/instant-alerts/prothena-prta-expected-to-announce-quarterly-earnings-on-monday-2026-07-27/
Prothena Announces Global Neuroscience Research & Development Collaboration with Celgene for Novel Therapies for Patients with Neurodegenerative Diseases
June 26, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/news/prothena-announces-global-neuroscience-research-200602520.html
Prothena (NASDAQ:PRTA) Major Shareholder William Scully Buys 20,000 Shares of Stock
June 19, 2026  |  insidertrades.comhttps://www.insidertrades.com/alerts/nasdaq-prta-insider-buying-and-selling-2026-06-19/
Insider Buying: Prothena (NASDAQ:PRTA) Major Shareholder Acquires 125,000 Shares of Stock
June 13, 2026  |  insidertrades.comhttps://www.insidertrades.com/alerts/nasdaq-prta-insider-buying-and-selling-2026-06-13/
Prothena (NASDAQ:PRTA) Major Shareholder Acquires $465,500.00 in Stock
June 6, 2026  |  insidertrades.comhttps://www.insidertrades.com/alerts/nasdaq-prta-insider-buying-and-selling-2026-06-06/
William Scully Buys 50,000 Shares of Prothena (NASDAQ:PRTA) Stock
June 4, 2026  |  insidertrades.comhttps://www.insidertrades.com/alerts/nasdaq-prta-insider-buying-and-selling-2026-06-04/
William Scully Purchases 100,000 Shares of Prothena (NASDAQ:PRTA) Stock
May 27, 2026  |  insidertrades.comhttps://www.insidertrades.com/alerts/nasdaq-prta-insider-buying-and-selling-2026-05-27/
Prothena Corp. Plc
May 19, 2026  |  edition.cnn.comhttps://edition.cnn.com/markets/stocks/PRTA
Piper Sandler Sticks to Its Buy Rating for Prothena (PRTA)
May 14, 2026  |  theglobeandmail.comhttps://www.theglobeandmail.com/investing/markets/stocks/PRTA/pressreleases/1826841/piper-sandler-sticks-to-its-buy-rating-for-prothena-prta/
Prothena (PRTA) Gets a Hold from RBC Capital
May 14, 2026  |  theglobeandmail.comhttps://www.theglobeandmail.com/investing/markets/stocks/PRTA/pressreleases/1833388/prothena-prta-gets-a-hold-from-rbc-capital/
Earnings Beat: Prothena Corporation plc Just Beat Analyst Forecasts, And Analysts Have Been Updating Their Models
May 12, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/markets/stocks/articles/earnings-beat-prothena-corporation-plc-131708841.html
Prothena Reports First Quarter 2026 Financial Results and Business Highlights
May 7, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260507030808/en/prothena-reports-first-quarter-2026-financial-results-and-business-highlights/
Prothena to Report First Quarter 2026 Financial Results on May 7
April 30, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260430688502/en/prothena-to-report-first-quarter-2026-financial-results-on-may-7/
Prothena announces Novo Nordisk obtains fast track designation from the US FDA for Coramitug (PRX004) in ATTR amyloidosis with cardiomyopathy
April 27, 2026  |  msn.comhttps://www.msn.com/en-us/technology/biotechnology/prothena-announces-novo-nordisk-obtains-fast-track-designation-from-the-us-fda-for-coramitug-prx004-in-attr-amyloidosis-with-cardiomyopathy/ar-AA21Rnod
Prothena Announces Novo Nordisk Obtains Fast Track Designation from the U.S. FDA for Coramitug (PRX004) in ATTR Amyloidosis with Cardiomyopathy
April 27, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260427325583/en/prothena-announces-novo-nordisk-obtains-fast-track-designation-from-the-u.s.-fda-for-coramitug-prx004-in-attr-amyloidosis-with-cardiomyopathy/
Prothena Announces Leadership Team Updates
April 10, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260410894357/en/prothena-announces-leadership-team-updates/
Prothena Partners Present Data Supporting Next Generation Treatments for Parkinson's and Alzheimer's Disease at AD/PD™ 2026
March 21, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260321254343/en/prothena-partners-present-data-supporting-next-generation-treatments-for-parkinson%e2%80%99s-and-alzheimer%e2%80%99s-disease-at-adpd%e2%84%a2-2026/
Prothena (PRTA) Gets a Sell from Bank of America Securities
March 14, 2026  |  theglobeandmail.comhttps://www.theglobeandmail.com/investing/markets/stocks/PRTA/pressreleases/577768/prothena-prta-gets-a-sell-from-bank-of-america-securities/
Prothena Announces Achievement of $50 Million Clinical Milestone Payment from Novo Nordisk Related to Ongoing Phase 3 Clinical Trial for Coramitug (Formerly PRX004) in ATTR ...
March 9, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/news/prothena-announces-achievement-50-million-200500743.html
Prothena Announces Achievement of $50 Million Clinical Milestone Payment from Novo Nordisk Related to Ongoing Phase 3 Clinical Trial for Coramitug (Formerly PRX004) in ATTR Amyloidosis with Cardiomyopathy
March 9, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260309588944/en/prothena-announces-achievement-of-50-million-clinical-milestone-payment-from-novo-nordisk-related-to-ongoing-phase-3-clinical-trial-for-coramitug-formerly-prx004-in-attr-amyloidosis-with-cardiomyopathy/
Prothena: A Hold With 2 Late-Stage Programs Underway But With Caution
March 3, 2026  |  seekingalpha.comhttps://seekingalpha.com/article/4877763-prothena-a-hold-with-2-late-stage-programs-underway-but-with-caution
Prothena authorizes up to $100 million share repurchase plan
February 27, 2026  |  seekingalpha.comhttps://seekingalpha.com/news/4558900-prothena-authorizes-up-to-100-million-share-repurchase-plan
Prothena stock jumps on $100M share buyback authorization
February 27, 2026  |  investing.comhttps://www.investing.com/news/stock-market-news/prothena-stock-jumps-on-100m-share-buyback-authorization-93CH-4532730
Prothena Announces up to $100 Million Share Repurchase Plan
February 27, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260227690121/en/Prothena-Announces-up-to-100-Million-Share-Repurchase-Plan/
Prothena Earnings Call: Pipeline Progress, Risks Ahead
February 21, 2026  |  tipranks.comhttps://www.tipranks.com/news/company-announcements/prothena-earnings-call-pipeline-progress-risks-ahead?utm_source=marketbeat.com&utm_medium=referral
Prothena Corporation plc 2025 Q4 - Results - Earnings Call Presentation
February 20, 2026  |  seekingalpha.comhttps://seekingalpha.com/article/4872830-prothena-corporation-plc-2025-q4-results-earnings-call-presentation
Prothena Corp PLC (PRTA) Q4 2025 Earnings Call Highlights: Strategic Advancements and Financial ...
February 20, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/news/prothena-corp-plc-prta-q4-050255053.html
Prothena Corporation plc (PRTA) Q4 2025 Earnings Call Transcript
February 19, 2026  |  seekingalpha.comhttps://seekingalpha.com/article/4872648-prothena-corporation-plc-prta-q4-2025-earnings-call-transcript
Prothena Reports Fourth Quarter and Full Year 2025 Financial Results, and Provides Financial Guidance and Business Highlights
February 19, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260219016841/en/prothena-reports-fourth-quarter-and-full-year-2025-financial-results-and-provides-financial-guidance-and-business-highlights/
Prothena to Report Fourth Quarter and Full Year 2025 Financial Results on February 19, 2026
February 12, 2026  |  businesswire.comhttps://www.businesswire.com/news/home/20260212843430/en/prothena-to-report-fourth-quarter-and-full-year-2025-financial-results-on-february-19-2026/
How The New Price Target And Partnerships Are Rewriting Prothena's Story
January 20, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/news/price-target-partnerships-rewriting-prothenas-050722804.html
How Are Partnered Pipelines Rewriting The Prothena (PRTA) Narrative And Price Target Outlook
January 6, 2026  |  finance.yahoo.comhttps://finance.yahoo.com/news/partnered-pipelines-rewriting-prothena-prta-210847459.html

Prothena Media Mentions By Week

Prothena Media Sentiment

Each headline receives a score ranging from 2 (good news) to -2 (bad news). Our company news sentiment scores track the average news sentiment of articles about each company over the most recent 7 days in order to identify companies that are receiving positive press.

PRTA
News Sentiment
▼
1.31

0.66
▲
Average
Healthcare
News Sentiment

Prothena News Coverage

We track news headlines from hundreds of news outlets and tag them by company. This chart compares the number of articles about this company in the last seven days compared with the average number of articles about this company on a typical week.

PRTA Articles
This Week
▼
6

2
▲
PRTA Articles
Average Week

Prothena Trends on MarketBeat

This week vs. last week
New Followers
2
+100%
Searches
1
-50%
Page Views
1,901
-1%
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MarketBeat tracks news from more than one hundred trusted media outlets in real time, with the most recent headline for Prothena dated 8/24/2026.
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