NASDAQ:PRTA - Prothena Price Target & Analyst Ratings Sign in or create an account to add this stock to your watchlist. Get Started $13.15 +0.40 (+3.14 %) (As of 02/18/2019 04:00 PM ET)Previous Close$12.75Today's Range$12.5667 - $13.5552-Week Range$8.63 - $44.75Volume613,546 shsAverage Volume417,976 shsMarket Capitalization$524.21 millionP/E Ratio-3.23Dividend YieldN/ABeta2.56 ProfileDiscussionAnalyst RatingsChartEarningsFinancialsInsider TradesInstitutional OwnershipHeadlinesOptions ChainSEC FilingsSocial Media Share on FacebookShare on TwitterShare on LinkedInShare on RedditShare on StocktwitsPrint this articleShare by Email Analyst Ratings Prothena (NASDAQ:PRTA) Price Target and Consensus Rating (How are Consensus Ratings Calculated?) MarketBeat calculates consensus analyst ratings for stocks using the most recent rating from each Wall Street analyst that has rated a stock within the last twelve months. Each analyst's rating is normalized to a standardized rating score of 1 (sell), 2 (hold), 3 (buy) or 4 (strong buy). Analyst consensus ratings scores are calculated using the mean average of the number of normalized sell, hold, buy and strong buy ratings from Wall Street analysts. Each stock's consensus analyst rating is derived from its calculated consensus ratings score (0-1.5 = Sell, 1.5-2.5 = Hold, 2.5-3.5 = Buy, >3.5 = Strong Buy). MarketBeat's consensus price targets are a mean average of the most recent available price targets set by each analyst that has set a price target for the stock in the last twelve months. MarketBeat's consensus ratings and consensus price targets may differ from those calculated by other firms due to differences in methodology and available data.9 Wall Street analysts have issued ratings and price targets for Prothena in the last 12 months. Their average twelve-month price target is $39.00, suggesting that the stock has a possible upside of 196.58%. The high price target for PRTA is $87.00 and the low price target for PRTA is $12.00. There are currently 1 sell rating, 5 hold ratings and 3 buy ratings for the stock, resulting in a consensus rating of "Hold."Today30 Days Ago90 Days Ago180 Days AgoConsensus Rating: HoldHoldHoldHoldConsensus Rating Score: 220.127.116.11.30Ratings Breakdown: 1 Sell Rating(s)5 Hold Rating(s)3 Buy Rating(s)0 Strong Buy Rating(s)1 Sell Rating(s)5 Hold Rating(s)3 Buy Rating(s)0 Strong Buy Rating(s)1 Sell Rating(s)5 Hold Rating(s)3 Buy Rating(s)0 Strong Buy Rating(s)1 Sell Rating(s)5 Hold Rating(s)4 Buy Rating(s)0 Strong Buy Rating(s)Consensus Price Target: $39.00$39.00$39.00$48.70Price Target Upside: 196.58% upside239.72% upside214.26% upside242.72% upsideProthena (NASDAQ:PRTA) Consensus Price Target History Prothena (NASDAQ:PRTA) Analyst Ratings History Show: Only the Most Recent Rating From Each Brokerage All Ratings For This Stock DateBrokerageActionRatingPrice TargetImpact on Share PriceDetails11/23/2018Cantor FitzgeraldReiterated RatingOverweightHigh11/11/2018OppenheimerReiterated RatingHoldHigh5/21/2018BarclaysDowngradeEqual Weight ➝ Underweight$12.00High4/24/2018NomuraLower Price TargetBuy ➝ Buy$87.00 ➝ $19.00High4/24/2018WedbushLower Price TargetNeutral$46.00 ➝ $13.00High4/24/2018BTIG ResearchDowngradeBuy ➝ Neutral$77.00High4/24/2018Deutsche BankReiterated RatingBuy ➝ Buy$78.00 ➝ $16.00High4/23/2018Royal Bank of CanadaDowngradeOutperform ➝ Sector Perform$87.00High4/23/2018Jefferies Financial GroupDowngradeBuy ➝ HoldHigh10/2/2017SunTrust BanksReiterated RatingBuy$75.00Low8/16/2017Evercore ISIInitiated CoverageOutperform ➝ Outperform$83.00High5/16/2017Piper Jaffray CompaniesReiterated RatingBuyMedium3/1/2017InstinetInitiated CoverageBuy ➝ Buy$87.00N/A(Data available from 2/18/2017 forward) This page was last updated on 2/18/2019 by MarketBeat.com StaffFeatured Article: What is a Swap?