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PRTAPRTA

$8.67

+0.03
arrow_drop_up0.35%
Market closed·update27 Feb 2026 21:00

$9.15

+0.48
arrow_drop_up5.54%
Post-market·update28 Feb 2026 00:54
Day's Range
8.48-8.79
52-week Range
4.32-16.048

Chart

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Performance

Key Stats

Next Earnings Date2026-02-19
Next Earnings TimeAfter Market Close
Volume439.38K
Average Volume 30d574.32K

AI PRTA Summary

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-2.3
Valuation (P/E Ratio)
Negative P/E suggests unprofitability, consider other metrics
📈
-2.51
EPS Growth (YoY)
Negative EPS growth indicates declining profitability
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AI Scoreboard

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Overall Analysis

Neutral
55

Prothena Corporation plc shows potential in its specific niche within biotechnology, particularly with its pipeline targeting neurodegenerative diseases. However, its current financial performance, high cash burn, and lack of profitability, coupled with mixed technical indicators, result in a neutral overall assessment. Investors should monitor clinical trial progress and strategic partnerships closely.

Moderate

Thematic

75

Prothena operates within the growing field of protein dysregulation therapies, with a focus on significant unmet needs in neurodegenerative diseases like Parkinson's and Alzheimer's. The company's pipeline addresses major healthcare trends, but its success is heavily reliant on clinical trial outcomes.

Weak

Fundamental

40

Prothena exhibits a weak fundamental profile due to significant cash burn, negative earnings, and no current revenue from marketed products. While it has substantial cash reserves to fund operations, profitability remains a distant prospect.

Neutral

Technical

50

Technical indicators for Prothena are mixed. While the stock has shown some resilience and is trading above longer-term moving averages, short-term indicators suggest caution due to a bearish MACD and RSI in oversold territory on shorter timeframes.

FactorScore
Neurodegenerative Disease Therapies85
Biotechnology Innovation80
Clinical Trial Progress70
Partnerships & Collaborations80
Regulatory Landscape60
FactorScore
Valuation10
Profitability5
Growth70
Balance Sheet Health70
Cash Flow10
FactorScore
Trend Analysis60
Momentum50
Volume Confirmation40
Support & Resistance50
MACD40

AI Investing Checklist

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Bullish Points (6)

Valuation chevron_right

Positive Revenue Growth Momentum

The company has shown a positive revenue growth trend, with revenue increasing from $53.91M in 2022 to $135.16M in 2024.

Financial Health & Liquidity chevron_right

Strong Cash Position

The company has a substantial cash position, with cash and cash equivalents of $471.39M as of Q4 2024.

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Bearish Points (9)

Earnings Performance chevron_right

Consistent Net Losses

The company has reported net losses in the trailing twelve months (-$177.15M) and for the fiscal years 2022, 2023, and 2024, indicating ongoing profitability challenges.

Valuation chevron_right

Negative P/E Ratio

The Price-to-Earnings (P/E) ratio is negative (-1.9 TTM, -6.1 for 2024), which is not uncommon for companies in the development stage but indicates no current earnings to base valuation on.

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Calendar

August 2025

8

Next Earnings Date

EPS Est.
Revenue Est.

H: $-1.33

A: $-1.79

L: $-2.57

H: 37.50M

A: 6.18M

0

Profile

Employees (FY)163
ISINIE00B91XRN20
FIGI-

Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation in the United States. Its product pipeline include Prasinezumab, an investigational humanized monoclonal antibody which is in phase 2b clinical trial, as well as phase 1 and 2 clinical trials for the treatment of parkinson's disease and other synucleinopathies. The company also develops Coramitug, an investigational antibody, which is in phase 2 clinical trial for potential treatment of transthyretin amyloidosis; BMS-986446, an investigational antibody, which is in phase 2 clinical trial to treat Alzheimer's disease; PRX012, an investigational antibody, which is in phase 1 clinical trial to treat Alzheimer's disease; PRX123, a Dual Aß-Tau Vaccine, which is in preclinical trial for treating Alzheimer's disease; and PRX019, an investigational antibody, which is in phase 1 clinical trial for the potential treatment of neurodegenerative diseases. 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.

Seasonals

2025
2024
2023
2022
2021

Price Target

24.29 USD

The 39 analysts offering 1 year price forecasts for PRTA have a max estimate of 81.00 and a min estimate of 4.00.

Debt Level and Coverage

Debt
Free cash flow
Cash & equivalents

Financial Position Analysis

Assets
Liabilities

Ownership

Free Float shares
40.7M (75.53%)
Closely held shares
13.2M (24.47%)
53.8M
Free Float shares
40.7M (75.53%)
Closely held shares
13.2M (24.47%)

Capital Structure

Market cap
348.26M
Debt
10.84M
Minority interest
0.00
Cash & equivalents
471.39M
Enterprise value
-112.28M

Valuation - Summary

Market Cap
348M
Net income
-177M(-50.87%)
Revenue
5.92M(1.70%)
348M
Market Cap
348M
Net income
-177M(-50.87%)
Revenue
5.92M(1.70%)
Price to earning ratio (P/E)-2.00x
Price to sales ratio (P/S)58.80x

Valuation - Ratios

P/E
P/S

Revenue to Profit Conversion

Revenue
135.16M
COGS
135.16M
Gross Profit
0.00
OpEx
289.72M
Operating Income
-154.56M
Other & Taxes
-32.25M
Net Income
-122.31M

Balance Sheet

Total assets
Total liabilities
Liabilities to assets %

Income Statement

Revenue
Net Income
Net Margin

Cash Flow

Operating Cash Flow
Investing Cash Flow
Financing Cash Flow
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