Prothena (PRTA) News Today $7.34 -0.01 (-0.11%) As of 10:18 AM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Headlines Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock 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 May 2025 April 2025 March 2025 February 2025 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 Time Period Insiders Re-Evaluate Their US$2.75m Stock Purchase As Prothena Falls To US$458mMay 4 at 2:18 PM | finance.yahoo.comBoxer Capital Management LLC Invests $9.56 Million in Prothena Co. plc (NASDAQ:PRTA)Boxer Capital Management LLC bought a new stake in Prothena Co. plc (NASDAQ:PRTA - Free Report) in the 4th quarter, according to its most recent filing with the Securities & Exchange Commission. The institutional investor bought 690,000 shares of the biotechnology company's stock, valued at apMay 4 at 6:25 AM | marketbeat.comSusquehanna Fundamental Investments LLC Purchases Shares of 80,677 Prothena Co. plc (NASDAQ:PRTA)Susquehanna Fundamental Investments LLC acquired a new stake in Prothena Co. plc (NASDAQ:PRTA - Free Report) during the 4th quarter, according to its most recent filing with the Securities & Exchange Commission. The fund acquired 80,677 shares of the biotechnology company's stock, valued at appMay 4 at 4:28 AM | marketbeat.comWilliam P. Scully Acquires 2,000 Shares of Prothena Co. plc (NASDAQ:PRTA) StockMay 3, 2025 | insidertrades.comPrice T Rowe Associates Inc. MD Trims Holdings in Prothena Co. plc (NASDAQ:PRTA)Price T Rowe Associates Inc. MD reduced its holdings in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) by 3.6% in the fourth quarter, according to the company in its most recent 13F filing with the Securities and Exchange Commission (SEC). The firm owned 3,685,708 shares of the biotechnologMay 2, 2025 | marketbeat.comProthena to Report First Quarter 2025 Financial Results on May 8May 1, 2025 | businesswire.comProthena (NASDAQ:PRTA) Trading Down 2.4% - What's Next?Prothena (NASDAQ:PRTA) Shares Down 2.4% - What's Next?April 30, 2025 | marketbeat.comBirchview Capital LP Buys 95,000 Shares of Prothena Co. plc (NASDAQ:PRTA)Birchview Capital LP raised its stake in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) by 45.3% in the fourth quarter, according to the company in its most recent disclosure with the SEC. The firm owned 304,574 shares of the biotechnology company's stock after acquiring an additional 95,00April 28, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Stock Price Up 7.7% - Still a Buy?Prothena (NASDAQ:PRTA) Trading 7.7% Higher - Should You Buy?April 23, 2025 | marketbeat.comJPMorgan Chase & Co. Purchases 187,364 Shares of Prothena Co. plc (NASDAQ:PRTA)JPMorgan Chase & Co. increased its holdings in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) by 93.7% in the 4th quarter, according to its most recent disclosure with the Securities and Exchange Commission. The fund owned 387,350 shares of the biotechnology company's stock after purchasingApril 20, 2025 | marketbeat.comVanguard Group Inc. Boosts Stake in Prothena Co. plc (NASDAQ:PRTA)Vanguard Group Inc. raised its position in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 11.5% during the fourth quarter, according to the company in its most recent 13F filing with the Securities and Exchange Commission (SEC). The firm owned 1,403,838 shares of the biotechnology company's stockApril 19, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Hits New 12-Month Low - What's Next?Prothena (NASDAQ:PRTA) Reaches New 12-Month Low - Here's What HappenedApril 18, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Stock Price Down 5.4% - What's Next?Prothena (NASDAQ:PRTA) Shares Down 5.4% - Time to Sell?April 17, 2025 | marketbeat.comNorges Bank Invests $796,000 in Prothena Co. plc (NASDAQ:PRTA)Norges Bank bought a new stake in Prothena Co. plc (NASDAQ:PRTA - Free Report) during the 4th quarter, according to its most recent Form 13F filing with the Securities and Exchange Commission. The institutional investor bought 57,454 shares of the biotechnology company's stock, valued at approximaApril 14, 2025 | marketbeat.comFederated Hermes Inc. Increases Stock Holdings in Prothena Co. plc (NASDAQ:PRTA)Federated Hermes Inc. lifted its holdings in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 84.3% during the 4th quarter, according to its most recent filing with the Securities & Exchange Commission. The firm owned 746,177 shares of the biotechnology company's stock after purchasing an additiApril 13, 2025 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Given Average Rating of "Moderate Buy" by BrokeragesShares of Prothena Co. plc (NASDAQ:PRTA - Get Free Report) have earned a consensus rating of "Moderate Buy" from the eight brokerages that are currently covering the firm, MarketBeat.com reports. Two analysts have rated the stock with a hold rating and six have assigned a buy rating to the companApril 13, 2025 | marketbeat.comMassachusetts Financial Services Co. MA Invests $621,000 in Prothena Co. plc (NASDAQ:PRTA)Massachusetts Financial Services Co. MA acquired a new position in Prothena Co. plc (NASDAQ:PRTA - Free Report) during the fourth quarter, according to the company in its most recent Form 13F filing with the Securities and Exchange Commission (SEC). The fund acquired 44,815 shares of the biotechnolApril 12, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Stock Price Down 9.6% - What's Next?Prothena (NASDAQ:PRTA) Stock Price Down 9.6% - Here's What HappenedApril 11, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Reaches New 1-Year Low - Here's What HappenedProthena (NASDAQ:PRTA) Sets New 12-Month Low - Time to Sell?April 9, 2025 | marketbeat.comFinepoint Capital LP Grows Position in Prothena Co. plc (NASDAQ:PRTA)Finepoint Capital LP increased its position in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 51.6% during the 4th quarter, according to the company in its most recent Form 13F filing with the Securities & Exchange Commission. The firm owned 657,071 shares of the biotechnology company's stockApril 8, 2025 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Shares Acquired by Wellington Management Group LLPWellington Management Group LLP boosted its position in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 22.8% during the 4th quarter, according to the company in its most recent disclosure with the Securities & Exchange Commission. The institutional investor owned 5,130,876 shares of the bioteApril 7, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Reaches New 12-Month Low - Here's What HappenedProthena (NASDAQ:PRTA) Reaches New 12-Month Low - What's Next?April 2, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Stock Price Down 7.2% - Time to Sell?Prothena (NASDAQ:PRTA) Shares Down 7.2% - What's Next?April 1, 2025 | marketbeat.comBrokers Issue Forecasts for Prothena FY2025 EarningsProthena Co. plc (NASDAQ:PRTA - Free Report) - Analysts at Chardan Capital issued their FY2025 EPS estimates for Prothena in a note issued to investors on Monday, March 24th. Chardan Capital analyst R. Li anticipates that the biotechnology company will post earnings per share of ($3.25) for the yMarch 28, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Trading 4.8% Higher - Should You Buy?Prothena (NASDAQ:PRTA) Shares Up 4.8% - Here's WhyMarch 27, 2025 | marketbeat.comBank of New York Mellon Corp Has $2.08 Million Stake in Prothena Co. plc (NASDAQ:PRTA)Bank of New York Mellon Corp boosted its position in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) by 14.9% during the fourth quarter, according to its most recent disclosure with the Securities & Exchange Commission. The institutional investor owned 150,238 shares of the biotechnologMarch 22, 2025 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Shares Sold by Connor Clark & Lunn Investment Management Ltd.Connor Clark & Lunn Investment Management Ltd. cut its holdings in Prothena Co. plc (NASDAQ:PRTA - Free Report) by 25.0% during the 4th quarter, according to its most recent Form 13F filing with the Securities and Exchange Commission (SEC). The fund owned 91,840 shares of the biotechnology company'March 20, 2025 | marketbeat.comProthena Co. plc (NASDAQ:PRTA) Given Consensus Recommendation of "Moderate Buy" by AnalystsProthena Co. plc (NASDAQ:PRTA - Get Free Report) has been assigned a consensus rating of "Moderate Buy" from the eight analysts that are currently covering the stock, MarketBeat reports. Two research analysts have rated the stock with a hold recommendation and six have assigned a buy recommendatioMarch 17, 2025 | marketbeat.comZacks Research Has Positive Outlook of Prothena Q1 EarningsProthena Co. plc (NASDAQ:PRTA - Free Report) - Equities researchers at Zacks Research upped their Q1 2025 EPS estimates for Prothena in a research note issued on Wednesday, March 12th. Zacks Research analyst E. Bagri now forecasts that the biotechnology company will earn ($1.06) per share for theMarch 17, 2025 | marketbeat.comZacks Research Estimates Prothena FY2027 EarningsProthena Co. plc (NASDAQ:PRTA - Free Report) - Zacks Research issued their FY2027 earnings estimates for Prothena in a report issued on Wednesday, March 12th. Zacks Research analyst E. Bagri anticipates that the biotechnology company will post earnings per share of ($3.04) for the year. The conseMarch 15, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Trading Down 8.1% - Should You Sell?Prothena (NASDAQ:PRTA) Trading Down 8.1% - What's Next?March 12, 2025 | marketbeat.comFoundation Wealth Management LLC Makes New $270,000 Investment in Prothena Co. plc (NASDAQ:PRTA)Foundation Wealth Management LLC purchased a new stake in shares of Prothena Co. plc (NASDAQ:PRTA - Free Report) during the fourth quarter, according to its most recent Form 13F filing with the Securities & Exchange Commission. The firm purchased 19,471 shares of the biotechnology company's stoMarch 8, 2025 | marketbeat.comProthena Corporation: Multiple Failures Make It RiskyMarch 3, 2025 | seekingalpha.comProthena (NASDAQ:PRTA) Shares Up 6.5% - Should You Buy?Prothena (NASDAQ:PRTA) Stock Price Up 6.5% - Time to Buy?March 1, 2025 | marketbeat.comProthena (NASDAQ:PRTA) Given New $110.00 Price Target at Piper SandlerPiper Sandler increased their price target on Prothena from $94.00 to $110.00 and gave the company an "overweight" rating in a report on Wednesday.February 27, 2025 | marketbeat.comProthena price target raised to $110 from $94 at Piper SandlerFebruary 26, 2025 | markets.businessinsider.comProthena (NASDAQ:PRTA) Upgraded at StockNews.comStockNews.com upgraded shares of Prothena from a "sell" rating to a "hold" rating in a research note on Monday.February 25, 2025 | marketbeat.comWhat is HC Wainwright's Estimate for Prothena Q4 Earnings?Prothena Co. plc (NASDAQ:PRTA - Free Report) - Equities research analysts at HC Wainwright issued their Q4 2025 earnings per share estimates for shares of Prothena in a report released on Friday, February 21st. HC Wainwright analyst A. Fein anticipates that the biotechnology company will earn ($0February 24, 2025 | marketbeat.comProthena Reports 2024 Financial Results and 2025 OutlookFebruary 22, 2025 | tipranks.comProthena’s Balanced Earnings Call Highlights Growth and ChallengesFebruary 22, 2025 | tipranks.comRoyal Bank of Canada Cuts Prothena (NASDAQ:PRTA) Price Target to $20.00Royal Bank of Canada reduced their target price on Prothena from $24.00 to $20.00 and set a "sector perform" rating on the stock in a research note on Friday.February 22, 2025 | marketbeat.comProthena's (PRTA) "Overweight" Rating Reaffirmed at Cantor FitzgeraldCantor Fitzgerald reaffirmed an "overweight" rating on shares of Prothena in a research report on Friday.February 22, 2025 | marketbeat.comHC Wainwright Reaffirms "Buy" Rating for Prothena (NASDAQ:PRTA)HC Wainwright reissued a "buy" rating and issued a $48.00 price objective on shares of Prothena in a research note on Friday.February 22, 2025 | marketbeat.comProthena's (PRTA) "Buy" Rating Reaffirmed at Chardan CapitalChardan Capital reiterated a "buy" rating and set a $40.00 target price on shares of Prothena in a research note on Friday.February 22, 2025 | marketbeat.comAnalysts Are Bullish on These Healthcare Stocks: Prothena (PRTA), Integer Holdings (ITGR)February 22, 2025 | markets.businessinsider.comProthena Reports Fourth Quarter and Full Year 2024 Financial Results, and Provides Financial Guidance and Business HighlightsFebruary 21, 2025 | uk.finance.yahoo.comAnalysts’ Opinions Are Mixed on These Healthcare Stocks: Insulet (PODD), Prothena (PRTA) and Travere Therapeutics (TVTX)February 21, 2025 | markets.businessinsider.comProthena price target lowered to $20 from $24 at RBC CapitalFebruary 21, 2025 | markets.businessinsider.comProthena Corporation plc (NASDAQ:PRTA) Q4 2024 Earnings Call TranscriptFebruary 21, 2025 | msn.comProthena (NASDAQ:PRTA) Issues Earnings Results, Misses Estimates By $0.06 EPSProthena (NASDAQ:PRTA - Get Free Report) released its quarterly earnings data on Thursday. The biotechnology company reported ($1.08) EPS for the quarter, missing the consensus estimate of ($1.02) by ($0.06). Prothena had a negative net margin of 98.86% and a negative return on equity of 24.19%.February 21, 2025 | 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▼1.370.65▲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▼114▲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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