Prothena (PRTA) News Today $13.18 -0.09 (-0.68%) Closing price 04:00 PM EasternExtended Trading$13.18 0.00 (0.00%) As of 04:45 PM 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 Polygon.io. Learn more. Add Compare Share Share Headlines Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrends All Sources Trusted Sources MarketBeat Benzinga Bloomberg GuruFocus MarketWatch Motley Fool NASDAQ PR Newswire Reuters Seeking Alpha TalkMarkets The Street TipRanks The Wall Street Journal Wall Street Zen Yahoo Finance Source Sentiment refers to the positivity or negativity of each headline according to our language processing algorithm. Sentiment All Sentiments Very Positive Positive Neutral Negative Very Negative Most Recent January 2025 December 2024 November 2024 October 2024 September 2024 August 2024 July 2024 June 2024 May 2024 April 2024 March 2024 February 2024 January 2024 December 2023 November 2023 October 2023 September 2023 August 2023 July 2023 June 2023 May 2023 April 2023 March 2023 February 2023 January 2023 December 2022 November 2022 October 2022 September 2022 August 2022 July 2022 June 2022 May 2022 April 2022 March 2022 February 2022 Time Period Prothena Co. plc (NASDAQ:PRTA) Shares Purchased by Barclays PLCBarclays PLC raised its holdings in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 110.2% during the third quarter, according to the company in its most recent Form 13F filing with the SEC. The firm owned 95,222 shares of the biotechnology company's stock after purchasing an additional 49,916 sharJanuary 12, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Trading Down 9% - What's Next?Prothena (NASDAQ:PRTA) Trading Down 9% - Here's What HappenedJanuary 10, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Trading Up 6.5% - What's Next?Prothena (NASDAQ:PRTA) Shares Up 6.5% - Here's WhyJanuary 7, 2025 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Given Consensus Recommendation of "Moderate Buy" by BrokeragesProthena Co. plc (NASDAQ:PRTA - Get Free Report) has received a consensus rating of "Moderate Buy" from the seven ratings firms that are presently covering the firm, MarketBeat Ratings reports. Two equities research analysts have rated the stock with a hold recommendation and five have given a buyJanuary 1, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Stock Price Down 2.6% - Should You Sell?Prothena (NASDAQ:PRTA) Stock Price Down 2.6% - Should You Sell?December 31, 2024 | marketbeat.comProthena Announces Board of Directors UpdateDecember 30, 2024 | businesswire.comProthena Co. plc (NASDAQ:PRTA) Shares Bought by Barclays PLCBarclays PLC grew its position in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) by 110.2% during the third quarter, according to its most recent Form 13F filing with the Securities & Exchange Commission. The institutional investor owned 95,222 shares of the biotechnology company's stoDecember 28, 2024 | marketbeat.comWe're Not Very Worried About Prothena's (NASDAQ:PRTA) Cash Burn RateDecember 25, 2024 | finance.yahoo.comProthena Co. plc (NASDAQ:PRTA) Position Trimmed by State Street CorpState Street Corp lessened its holdings in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) by 13.3% in the third quarter, according to the company in its most recent filing with the Securities & Exchange Commission. The fund owned 1,674,909 shares of the biotechnology company's stock aftDecember 23, 2024 | marketbeat.comProthena Surges After Parkinson's Drug Misses Primary EndpointDecember 22, 2024 | seekingalpha.comOptimistic Outlook on Prothena Despite Phase 2b PADOVA SetbacksDecember 21, 2024 | markets.businessinsider.comChardan Capital Initiates Coverage of Prothena (PRTA) with Buy RecommendationDecember 20, 2024 | msn.comProthena price target lowered to $48 from $84 at H.C. WainwrightDecember 20, 2024 | markets.businessinsider.comHC Wainwright Reiterates "Buy" Rating for Prothena (NASDAQ:PRTA)HC Wainwright reissued a "buy" rating and issued a $48.00 price target (down previously from $84.00) on shares of Prothena in a research note on Friday.December 20, 2024 | marketbeat.comProthena (NASDAQ:PRTA) Now Covered by Chardan CapitalChardan Capital initiated coverage on Prothena in a research note on Friday. They set a "buy" rating and a $40.00 price objective for the company.December 20, 2024 | marketbeat.comProthena stock soars despite study missDecember 20, 2024 | uk.investing.comBank of America Lowers Prothena (NASDAQ:PRTA) Price Target to $22.00Bank of America lowered their price objective on shares of Prothena from $26.00 to $22.00 and set a "neutral" rating on the stock in a research report on Thursday.December 19, 2024 | marketbeat.comProthena (NASDAQ:PRTA) Hits New 52-Week Low - Here's WhyProthena (NASDAQ:PRTA) Sets New 12-Month Low - Time to Sell?December 19, 2024 | marketbeat.comRoche's Phase IIb Study of Prasinezumab Missed Primary Endpoint, But Suggests Possible Clinical Benefit in Early-Stage Parkinson's DiseaseDecember 19, 2024 | businesswire.comProthena (NASDAQ:PRTA) Stock Price Down 3.6% - Time to Sell?Prothena (NASDAQ:PRTA) Stock Price Down 3.6% - Should You Sell?December 18, 2024 | marketbeat.comProthena (NASDAQ:PRTA) Stock Price Up 7.8% - What's Next?Prothena (NASDAQ:PRTA) Trading 7.8% Higher - Time to Buy?December 17, 2024 | marketbeat.comProthena (PRTA) Receives a Buy from OppenheimerDecember 17, 2024 | markets.businessinsider.comJanus Henderson Group PLC Has $301,000 Holdings in Prothena Co. plc (NASDAQ:PRTA)Janus Henderson Group PLC lessened its position in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 98.2% during the third quarter, according to the company in its most recent 13F filing with the SEC. The fund owned 18,047 shares of the biotechnology company's stock after selling 1,008,511 shares duDecember 16, 2024 | marketbeat.comProthena (NASDAQ:PRTA) Hits New 52-Week Low - Should You Sell?Prothena (NASDAQ:PRTA) Reaches New 52-Week Low - Time to Sell?December 13, 2024 | marketbeat.comWellington Management Group LLP Purchases 539,359 Shares of Prothena Co. plc (NASDAQ:PRTA)Wellington Management Group LLP increased its holdings in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) by 14.8% during the 3rd quarter, according to the company in its most recent filing with the Securities and Exchange Commission (SEC). The firm owned 4,178,788 shares of the biotechnologDecember 11, 2024 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Shares Bought by UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLCUBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC raised its stake in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 1,122.9% in the 3rd quarter, according to its most recent filing with the SEC. The fund owned 526,748 shares of the biotechnology company's stock after purchasingDecember 9, 2024 | marketbeat.comSystematic Financial Management LP Has $136,000 Stock Position in Prothena Co. plc (NASDAQ:PRTA)Systematic Financial Management LP lessened its holdings in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) by 95.8% during the 3rd quarter, according to its most recent filing with the Securities and Exchange Commission. The firm owned 8,125 shares of the biotechnology company's stock afterDecember 7, 2024 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Given Average Recommendation of "Moderate Buy" by AnalystsProthena Co. plc (NASDAQ:PRTA - Get Free Report) has been given a consensus rating of "Moderate Buy" by the seven ratings firms that are currently covering the stock, MarketBeat reports. Two investment analysts have rated the stock with a hold rating and five have given a buy rating to the companyDecember 7, 2024 | marketbeat.comFY2024 EPS Estimates for Prothena Lifted by Zacks ResearchProthena Co. plc (NASDAQ:PRTA - Free Report) - Research analysts at Zacks Research increased their FY2024 EPS estimates for shares of Prothena in a report issued on Tuesday, December 3rd. Zacks Research analyst E. Bagri now expects that the biotechnology company will post earnings per share of ($December 6, 2024 | marketbeat.comProthena FY2024 EPS Forecast Raised by Cantor FitzgeraldProthena Co. plc (NASDAQ:PRTA - Free Report) - Analysts at Cantor Fitzgerald boosted their FY2024 earnings per share estimates for shares of Prothena in a research note issued to investors on Wednesday, November 13th. Cantor Fitzgerald analyst C. Duncan now forecasts that the biotechnology companNovember 18, 2024 | marketbeat.comFY2024 EPS Estimates for Prothena Cut by HC WainwrightProthena Co. plc (NASDAQ:PRTA - Free Report) - Equities research analysts at HC Wainwright reduced their FY2024 earnings estimates for shares of Prothena in a research note issued to investors on Wednesday, November 13th. HC Wainwright analyst A. Fein now forecasts that the biotechnology companyNovember 18, 2024 | marketbeat.comProthena's SWOT analysis: stock poised for potential breakthroughs amid risksNovember 15, 2024 | investing.comProthena (NASDAQ:PRTA) Hits New 12-Month Low - What's Next?Prothena (NASDAQ:PRTA) Hits New 12-Month Low - Time to Sell?November 15, 2024 | marketbeat.comHC Wainwright Increases Earnings Estimates for ProthenaProthena Co. plc (NASDAQ:PRTA - Free Report) - Investment analysts at HC Wainwright lifted their FY2028 earnings per share estimates for shares of Prothena in a research report issued on Wednesday, November 13th. HC Wainwright analyst A. Fein now forecasts that the biotechnology company will postNovember 15, 2024 | marketbeat.comProthena’s Strategic Advancements and Financial Strength Underpin Buy RatingNovember 14, 2024 | markets.businessinsider.comProthena’s Promising Therapeutic Developments and Positive Trial Outcomes Justify Buy RatingNovember 14, 2024 | markets.businessinsider.comProthena (NASDAQ:PRTA) Given "Buy" Rating at HC WainwrightHC Wainwright reaffirmed a "buy" rating and set a $84.00 price target on shares of Prothena in a report on Wednesday.November 13, 2024 | marketbeat.comProthena (NASDAQ:PRTA) Issues Quarterly Earnings Results, Beats Estimates By $0.08 EPSProthena (NASDAQ:PRTA - Get Free Report) announced its quarterly earnings results on Tuesday. The biotechnology company reported ($1.10) earnings per share (EPS) for the quarter, beating the consensus estimate of ($1.18) by $0.08. The business had revenue of $0.97 million during the quarter, compared to analyst estimates of $1.22 million. Prothena had a negative return on equity of 9.00% and a negative net margin of 23.44%. The firm's revenue was down 98.9% on a year-over-year basis. During the same period in the previous year, the company earned $0.38 EPS.November 13, 2024 | marketbeat.comProthena Reports Third Quarter 2024 Financial Results and Business HighlightsNovember 13, 2024 | finanznachrichten.deProthena Corporation Reports Q3 2024 Financial ResultsNovember 13, 2024 | markets.businessinsider.comProthena Co. plc (NASDAQ:PRTA) Receives Average Rating of "Moderate Buy" from BrokeragesProthena Co. plc (NASDAQ:PRTA - Get Free Report) has been given a consensus rating of "Moderate Buy" by the seven ratings firms that are presently covering the company, Marketbeat Ratings reports. Two research analysts have rated the stock with a hold rating and five have assigned a buy rating toNovember 12, 2024 | marketbeat.comProthena (PRTA) Scheduled to Post Earnings on TuesdayProthena (NASDAQ:PRTA) will be releasing earnings after the market closes on Tuesday, November 12, Zacks reports.November 6, 2024 | marketbeat.comProthena to Report Third Quarter 2024 Financial Results on November 12November 6, 2024 | finance.yahoo.comProthena (PRTA) Gets a Buy from OppenheimerOctober 30, 2024 | markets.businessinsider.comProthena (NASDAQ:PRTA) Trading 5.7% Higher - Here's What HappenedProthena (NASDAQ:PRTA) Shares Up 5.7% - Should You Buy?October 29, 2024 | marketbeat.comOptimistic Buy Rating for Prothena Driven by Clinical Updates and Strategic CollaborationsOctober 28, 2024 | markets.businessinsider.comProthena (NASDAQ:PRTA) Shares Gap Up - Time to Buy?Prothena (NASDAQ:PRTA) Shares Gap Up - Time to Buy?October 28, 2024 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Sees Significant Growth in Short InterestProthena Co. plc (NASDAQ:PRTA - Get Free Report) saw a significant increase in short interest in the month of October. As of October 15th, there was short interest totalling 6,790,000 shares, an increase of 28.1% from the September 30th total of 5,300,000 shares. Based on an average daily trading volume, of 442,400 shares, the days-to-cover ratio is currently 15.3 days.October 28, 2024 | marketbeat.comProthena (NASDAQ:PRTA) Sets New 12-Month Low - Here's What HappenedProthena (NASDAQ:PRTA) Hits New 52-Week Low - Here's What HappenedOctober 25, 2024 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Shares Sold by SG Americas Securities LLCSG Americas Securities LLC decreased its stake in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 74.2% during the 3rd quarter, according to the company in its most recent disclosure with the Securities & Exchange Commission. The firm owned 14,087 shares of the biotechnology company's stock aftOctober 22, 2024 | marketbeat.com Get Prothena News Delivered to You Automatically Sign up to receive the latest news and ratings for PRTA and its competitors with MarketBeat's FREE daily newsletter. Email Address PRTA Media Mentions By Week PRTA Media Sentiment Learn about the media sentiment score. 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▼1.140.71▲Average Medical News Sentiment PRTA News Coverage Learn about the media coverage comparison. 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▼33▲PRTA Articles Average Week Get Prothena News Delivered to You Automatically Sign up to receive the latest news and ratings for PRTA and its competitors with MarketBeat's FREE daily newsletter. 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