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Prothena Corporation plc

PRTA
$8.47
$-0.09 (-0.99%)
Open
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IndexN/A
Market Cap0.44B
Enterprise Value0.22B
Income$-0.06B
Sales$0.00B
EmployeesN/A
P/E-3.46
P/S53.08
P/B1.83
P/C-3.14
EV/EBITDA-1.12
EV/SalesN/A
EPS (ttm)-2.45
EarningsN/A
Gross Margin61.77%
Oper. Margin-1905.82%
Profit Margin-2520.57%
Volume0.31M
Shs Outstand0.05B
Change-0.99%
Dividend Est.N/A
Dividend Ex-DateN/A
Perf YTDN/A
Perf YearN/A
Perf 3YN/A
Perf 5YN/A
Perf 10YN/A
IPON/A
Jul 2203:42AMProthena (NASDAQ:PRTA) Share Price Passes Below 200-Day Moving Average – Time to Sell?(defenseworld.net)
Jul 912:40PMPRTA Stock Rises Nearly 11% in Six Months: What's Driving It?(zacks.com)
Jun 2412:41PMSRPT or PRTA: Which Is the Better Value Stock Right Now?(zacks.com)
May 811:41AMProthena Posts Q1 Earnings as Revenues Surge on Milestone Payment(zacks.com)
May 704:05PMProthena Reports First Quarter 2026 Financial Results and Business Highlights(businesswire.com)
Apr 2704:05PMProthena Announces Novo Nordisk Obtains Fast Track Designation from the U.S. FDA for Coramitug (PRX004) in ATTR Amyloidosis with Cardiomyopathy(businesswire.com)
Apr 1004:05PMProthena Announces Leadership Team Updates(businesswire.com)
Mar 2610:56AMWall Street Analysts Think Prothena (PRTA) Could Surge 120.19%: Read This Before Placing a Bet(zacks.com)
Mar 2104:05PMProthena Partners Present Data Supporting Next Generation Treatments for Parkinson's and Alzheimer's Disease at AD/PD™ 2026(businesswire.com)
Mar 904:05PMProthena Announces Achievement of $50 Million Clinical Milestone Payment from Novo Nordisk Related to Ongoing Phase 3 Clinical Trial for Coramitug (Formerly PRX004) in ATTR Amyloidosis with Cardiomyopathy(businesswire.com)
Mar 301:50PMProthena: A Hold With 2 Late-Stage Programs Underway But With Caution(seekingalpha.com)10:56AMWall Street Analysts Believe Prothena (PRTA) Could Rally 118.09%: Here's is How to Trade(zacks.com)
Feb 2704:15PMProthena Announces up to $100 Million Share Repurchase Plan(businesswire.com)
Feb 2012:30PMProthena Q4 Earnings Meet Estimates, Pipeline Progress in Focus(zacks.com)
Feb 1909:24PMProthena Corporation plc (PRTA) Q4 2025 Earnings Call Transcript(seekingalpha.com)06:35PMProthena (PRTA) Reports Q4 Loss, Lags Revenue Estimates(zacks.com)04:05PMProthena Reports Fourth Quarter and Full Year 2025 Financial Results, and Provides Financial Guidance and Business Highlights(businesswire.com)
Feb 1610:56AMProthena Stock Tumbles 36.8% Year Over Year: What Lies Ahead?(zacks.com)
Feb 1312:40PMFTRE vs. PRTA: Which Stock Is the Better Value Option?(zacks.com)
Feb 1204:05PMProthena to Report Fourth Quarter and Full Year 2025 Financial Results on February 19, 2026(businesswire.com)
Jan 2101:01PMAll You Need to Know About Prothena (PRTA) Rating Upgrade to Buy(zacks.com)
Dec 2503:30AM89,704 Shares in Prothena Corporation plc $PRTA Acquired by Assenagon Asset Management S.A.(defenseworld.net)
Dec 2105:36AMSquarepoint Ops LLC Takes $1.27 Million Position in Prothena Corporation plc $PRTA(defenseworld.net)
Dec 1204:05PMProthena Announces Board of Directors Update(businesswire.com)03:51AMProthena Corporation plc $PRTA Shares Bought by Federated Hermes Inc.(defenseworld.net)
Nov 1904:05PMProthena Announces Poster Presentation on its TDP-43 CYTOPE® Program at Neuroscience 2025(businesswire.com)
Nov 1109:00AMProthena Highlights Phase 2 Data for Coramitug (Formerly PRX004) Published in Circulation, Official Journal of AHA(businesswire.com)
Nov 711:36AMProthena Q3 Earnings Miss Estimates, Pipeline Progress in Focus(zacks.com)
Nov 606:46PMProthena (PRTA) Reports Q3 Loss, Lags Revenue Estimates(zacks.com)04:05PMProthena Reports Third Quarter 2025 Financial Results and Business Highlights(businesswire.com)

Insider Trading

View All
Insider
Type
Shares
Price
Value
Date
MICHAEL JOHN ISAACS
Sell
8.4K
$8.47
$71K
Jul 29, 26
ANNE KINGSTON
Sell
7.7K
$8.47
$65K
Jul 29, 26
SCULLY WILLIAM P
Buy
20.0K
$7.90
$158K
Jun 16, 26
SCULLY WILLIAM P
Gift
325.0K
—
—
Jun 15, 26
SCULLY WILLIAM P
Buy
125.0K
$8.17
$1.0M
Jun 11, 26

Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation. Its product pipeline includes Prasinezumab, an investigational humanized monoclonal antibody which is in Phase 3 clinical trial for the treatment of parkinson's disease and other synucleinopathies. The company also develops Coramitug, an investigational antibody, which is in Phase 3 clinical trial for the treatment of transthyretin amyloidosis; BMS-986446, an anti-tau antibody which is in Phase 2 clinical trial to treat Alzheimer's disease; PRX019, an investigational antibody which is in Phase 1 clinical trial for the treatment of neurodegenerative diseases; and PRX123, a Dual Aß-Tau Vaccine, which is in preclinical trial for treating Alzheimer's disease. In addition, it develops discovery- and late-preclinical-stage programs include TDP-43 CYTOPE for the treatment of amyotrophic lateral sclerosis; PRX012, a next-generation anti-Aß antibody which is in phase 1 clinical trial to treat Alzheimer's disease; and PRX012-TfR, a preclinical program for the treatment of Alzheimer's disease. It has a license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. to develop and commercialize antibodies that target a-synuclein, including prasinezumab; and master collaboration agreement with Bristol Myers Squibb to develop and commercialize antibodies targeting tau, TDP-43. Prothena Corporation plc was incorporated in 2012 and is based in Dublin, Ireland.

CEO: Gene G. KinneyEmployees: 67www.prothena.com
MetricFY 2024FY 2023FY 2022FY 2021FY 2020FY 2019FY 2018FY 2017
Revenue$135.16M$91.37M$53.91M$200.58M$853.00K$814.00K$955.00K$27.52M
Cost of RevenueN/AN/AN/AN/A$74.88M$50.84M$101.18M$134.55M
Gross Profit$135.16M$91.37M$53.91M$200.58M$-74.03M$-50.02M$-100.23M$-107.03M
Gross Margin100.00%100.00%100.00%100.00%-8678.90%-6145.21%-10495.08%-388.92%
Operating Expenses$289.72M$282.41M$185.46M$128.60M$38.70M$35.67M$58.63M$48.23M
Operating Income$-154.56M$-191.04M$-131.56M$71.97M$-112.73M$-85.70M$-158.85M$-155.25M
Operating Margin-114.36%-209.08%-244.05%35.88%-13216.18%-10527.89%-16634.03%-564.17%
Net Income$-122.31M$-147.03M$-116.95M$66.97M$-111.14M$-77.68M$-155.65M$-153.24M
Net Margin-90.49%-160.91%-216.95%33.39%-13029.78%-9542.63%-16297.91%-556.84%
EPS (Basic)$-2.27$-2.76$-2.47$1.51$-2.78$-1.95$-3.93$-4.07
EBITDAN/AN/AN/AN/AN/AN/AN/AN/A
Stock Option Compensation ExpenseN/AN/AN/AN/AN/AN/AN/AN/A
Price To Earnings RatioN/AN/AN/AN/AN/AN/AN/AN/A
Price To Sales RatioN/AN/AN/AN/AN/AN/AN/AN/A
Shares OutstandingN/AN/AN/AN/AN/AN/AN/AN/A
Market CapitalizationN/AN/AN/AN/AN/AN/AN/AN/A

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