NASDAQ:PRTA Prothena Q2 2026 Earnings Report $8.58 +0.12 (+1.42%) Closing price 09/18/2026 04:00 PM EasternExtended Trading$8.60 +0.03 (+0.29%) As of 09/18/2026 07:30 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 Massive. Learn more. ProfileEarnings HistoryForecast Prothena EPS ResultsActual EPS-$0.32Consensus EPS -$0.39Beat/MissBeat by +$0.07One Year Ago EPSN/AProthena Revenue ResultsActual Revenue$1.01 millionExpected Revenue$0.42 millionBeat/MissBeat by +$588.00 thousandYoY Revenue GrowthN/AProthena Announcement DetailsQuarterQ2 2026Date8/6/2026TimeAfter Market ClosesConference Call DateThursday, August 6, 2026Conference Call Time4:00PM ETUpcoming EarningsProthena's Q3 2026 earnings is estimated for Thursday, November 5, 2026, based on past reporting schedules, with a conference call scheduled at 4:00 PM ET. Check back for transcripts, audio, and key financial metrics as they become available.Conference Call ResourcesPress Release (8-K)Quarterly Report (10-Q)SEC FilingEarnings HistoryCompany ProfilePowered by Earnings DocumentsPress Release(8-K)Quarterly report(10-Q) Prothena Earnings HeadlinesProthena to Participate in the H.C. Wainwright 28th Annual Global Investment ConferenceSeptember 9, 2026 | businesswire.comRBC Capital Keeps Their Hold Rating on Prothena (PRTA)August 8, 2026 | theglobeandmail.comTicker Revealed: Pre-IPO Access to "Next Elon Musk" CompanyWe’ve found The Next Elon Musk… and what we believe to be the next Tesla. It’s already racked up $26 billion in government contracts. Peter Thiel just bet $1 Billion on it.September 19 at 1:00 AM | Banyan Hill Publishing (Ad)Prothena: Q2 Earnings SnapshotAugust 6, 2026 | chron.comProthena Reports Second Quarter 2026 Financial Results and Business HighlightsAugust 6, 2026 | businesswire.comProthena to Report Second Quarter 2026 Financial Results on August 6July 30, 2026 | finance.yahoo.comSee More Prothena Headlines Get Earnings Announcements in your inboxWant to stay updated on the latest earnings announcements and upcoming reports for companies like Prothena? Sign up for Earnings360's daily newsletter to receive timely earnings updates on Prothena and other key companies, straight to your email. Email Address About ProthenaProthena (NASDAQ:PRTA) (NASDAQ: PRTA) is a clinical-stage biotechnology company focused on discovering and developing novel therapies for neurodegenerative and other protein-misfolding diseases. The company’s research is based on targeting abnormal proteins and the biological processes associated with their accumulation in tissue. Prothena’s lead programs include birtamimab, an investigational antibody being developed for patients with AL amyloidosis, and prasinezumab, an investigational antibody targeting alpha-synuclein for Parkinson’s disease. Prasinezumab is being developed in collaboration with Roche. The company also maintains research programs aimed at identifying additional treatments for diseases involving amyloid and other misfolded proteins. Founded in 2012 as a spin-off of Elan Corporation, Prothena is headquartered in Dublin, Ireland, and conducts research and development activities serving international markets. Its work is primarily focused on advancing clinical-stage medicines through partnerships and internal development rather than on commercialized products.View Prothena ProfileRead more More Earnings Resources from MarketBeat Earnings Tools Today's Earnings Tomorrow's Earnings Next Week's Earnings Upcoming Earnings Calls Earnings Newsletter Earnings Call Transcripts Earnings Beats & Misses Corporate Guidance Earnings Screener Latest Articles J.B. Hunt's Stock Plunges After Market Misprices Profit WarningLennar’s Earnings Miss May Be Sending a Bigger Warning About U.S. HousingLennar's Q3 Miss Hides a Stronger Operating Story Beneath the Housing SlumpAeluma’s Selloff Could Be Setting Up Its Next Big MoveBraze Beat Expectations—Now 2 SaaS Peers Are in FocusPriced for a Pullback or More Gains? 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