NASDAQ:PRTA Prothena Q2 2025 Earnings Report $8.75 +0.22 (+2.58%) Closing price 07/24/2026 04:00 PM EasternExtended Trading$8.90 +0.15 (+1.77%) As of 07/24/2026 04:15 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-$1.86Consensus EPS -$1.11Beat/MissMissed by -$0.75One Year Ago EPSN/AProthena Revenue ResultsActual Revenue$4.42 millionExpected Revenue$5.36 millionBeat/MissMissed by -$943.00 thousandYoY Revenue GrowthN/AProthena Announcement DetailsQuarterQ2 2025Date8/4/2025TimeAfter Market ClosesConference Call DateMonday, August 4, 2025Conference Call Time4:00PM ETUpcoming EarningsProthena's Q2 2026 earnings is estimated for Monday, August 3, 2026, based on past reporting schedules, with a conference call scheduled on Thursday, August 6, 2026 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)Earnings HistoryCompany ProfilePowered by Earnings DocumentsPress Release(8-K)Quarterly report(10-Q) Prothena Earnings HeadlinesProthena (NASDAQ:PRTA) Stock Rating Lowered by Wall Street ZenJuly 25 at 1:30 AM | americanbankingnews.comProthena Announces Global Neuroscience Research & Development Collaboration with Celgene for Novel Therapies for Patients with Neurodegenerative DiseasesJune 26, 2026 | finance.yahoo.comDo this before December or regret itPorter Stansberry believes President Trump will use the December G20 Summit in Miami to unveil a radical monetary reset tied to executive order 14241 - one he says could draw a sharp dividing line between prepared investors and those left behind. The last time America reset its money - under Nixon in the 1970s - it produced an average of 1,300 new millionaires per day for over 50 years. Stansberry's new documentary names a core group of assets he believes are positioned to surge as Trump's new dollar rolls out. Watch Porter Stansberry's full briefing and get his three steps to prepare before December.July 26 at 1:00 AM | Porter & Company (Ad)Prothena Corp. PlcMay 19, 2026 | edition.cnn.comPiper Sandler Sticks to Its Buy Rating for Prothena (PRTA)May 14, 2026 | theglobeandmail.comProthena (PRTA) Gets a Hold from RBC CapitalMay 14, 2026 | theglobeandmail.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) is a clinical-stage biotechnology company dedicated to the discovery and development of novel therapies for neurodegenerative and rare diseases driven by misfolded proteins. The company’s research focuses on immunotherapies and small molecules designed to target and clear disease-causing protein aggregates. Prothena leverages proprietary protein engineering and antibody discovery platforms to advance candidates through preclinical and clinical stages. The company’s most advanced program is an antibody targeting aggregated alpha-synuclein for the potential treatment of Parkinson’s disease, currently in mid-stage clinical trials. Additional pipeline candidates include therapies for amyloid light chain (AL) amyloidosis and other protein misfolding disorders. Prothena collaborates with global pharmaceutical partners to further develop and commercialize its product candidates, pooling resources and expertise to accelerate research timelines. Founded in 2012 as a spin-out from Elan Corporation, Prothena is headquartered in South San Francisco, California, with research operations in both the United States and Ireland. The company maintains a global focus, engaging regulators and trial sites across North America, Europe and Asia to support its clinical development programs. Prothena’s commitment to addressing high-unmet-need diseases is reflected in its strategic partnerships and research investments. Prothena is led by President and Chief Executive Officer Gene Kinney, whose experience spans decades in the pharmaceutical and biotechnology sectors. Under his leadership, the company has built a multidisciplinary team of scientists, clinicians and commercial experts. Prothena’s board and management team bring deep expertise in protein science, immunology and drug development to guide the company’s mission of bringing new treatment options to patients worldwide. 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