Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
9.15
+0.22 (2.46%)
At close: Jun 22, 2026, 4:00 PM EDT
8.97
-0.18 (-1.97%)
After-hours: Jun 22, 2026, 6:05 PM EDT

Prothena Corporation Statistics

Total Valuation

PRTA has a market cap or net worth of $479.03 million. The enterprise value is $157.22 million.

Market Cap479.03M
Enterprise Value 157.22M

Important Dates

The next estimated earnings date is Monday, August 3, 2026, after market close.

Earnings Date Aug 3, 2026
Ex-Dividend Date n/a

Share Statistics

PRTA has 52.35 million shares outstanding. The number of shares has decreased by -0.00% in one year.

Current Share Class 52.35M
Shares Outstanding 52.35M
Shares Change (YoY) -0.00%
Shares Change (QoQ) +0.52%
Owned by Insiders (%) 20.73%
Owned by Institutions (%) 82.01%
Float 36.50M

Valuation Ratios

PE Ratio n/a
Forward PE n/a
PS Ratio 8.27
Forward PS 14.85
PB Ratio 1.55
P/TBV Ratio 1.53
P/FCF Ratio n/a
P/OCF Ratio n/a
PEG Ratio n/a
Financial Ratio History

Enterprise Valuation

EV / Earnings n/a
EV / Sales 2.71
EV / EBITDA n/a
EV / EBIT n/a
EV / FCF n/a

Financial Position

The company has a current ratio of 10.43, with a Debt / Equity ratio of 0.02.

Current Ratio 10.43
Quick Ratio 10.13
Debt / Equity 0.02
Debt / EBITDA n/a
Debt / FCF n/a
Interest Coverage n/a

Financial Efficiency

Return on equity (ROE) is -40.30% and return on invested capital (ROIC) is -4,795.64%.

Return on Equity (ROE) -40.30%
Return on Assets (ROA) -13.78%
Return on Invested Capital (ROIC) -4,795.64%
Return on Capital Employed (ROCE) -29.36%
Weighted Average Cost of Capital (WACC) 2.45%
Revenue Per Employee $864,776
Profits Per Employee -$2.26M
Employee Count67
Asset Turnover 0.14
Inventory Turnover n/a

Taxes

In the past 12 months, PRTA has paid $44.44 million in taxes.

Income Tax 44.44M
Effective Tax Rate n/a

Stock Price Statistics

The stock price has increased by +59.97% in the last 52 weeks. The beta is -0.32, so PRTA's price volatility has been lower than the market average.

Beta (5Y) -0.32
52-Week Price Change +59.97%
50-Day Moving Average 9.85
200-Day Moving Average 9.64
Relative Strength Index (RSI) 50.78
Average Volume (20 Days) 568,708

Short Selling Information

The latest short interest is 7.74 million, so 14.78% of the outstanding shares have been sold short.

Short Interest 7.74M
Short Previous Month 7.10M
Short % of Shares Out 14.78%
Short % of Float 21.20%
Short Ratio (days to cover) 14.27

Income Statement

In the last 12 months, PRTA had revenue of $57.94 million and -$151.18 million in losses. Loss per share was -$2.81.

Revenue57.94M
Gross Profit -38.73M
Operating Income -93.19M
Pretax Income -106.73M
Net Income -151.18M
EBITDA -92.33M
EBIT -93.19M
Loss Per Share -$2.81
Full Income Statement

Balance Sheet

The company has $329.46 million in cash and $7.65 million in debt, with a net cash position of $321.81 million or $6.15 per share.

Cash & Cash Equivalents 329.46M
Total Debt 7.65M
Net Cash 321.81M
Net Cash Per Share $6.15
Equity (Book Value) 312.62M
Book Value Per Share 5.89
Working Capital 306.68M
Full Balance Sheet

Cash Flow

In the last 12 months, operating cash flow was -$81.34 million and capital expenditures -$96,000, giving a free cash flow of -$81.44 million.

Operating Cash Flow -81.34M
Capital Expenditures -96,000
Depreciation & Amortization 856,000
Net Borrowing n/a
Free Cash Flow -81.44M
FCF Per Share -$1.56
Full Cash Flow Statement

Margins

Gross margin is -66.84%, with operating and profit margins of -160.84% and -260.92%.

Gross Margin -66.84%
Operating Margin -160.84%
Pretax Margin -184.21%
Profit Margin -260.92%
EBITDA Margin -159.36%
EBIT Margin -160.84%
FCF Margin n/a

Dividends & Yields

PRTA does not appear to pay any dividends at this time.

Dividend Per Share n/a
Dividend Yield n/a
Dividend Growth (YoY) n/a
Years of Dividend Growth n/a
Payout Ratio n/a
Buyback Yield 0.00%
Shareholder Yield 0.00%
Earnings Yield -31.56%
FCF Yield -17.00%

Analyst Forecast

The average price target for PRTA is $21.40, which is 133.88% higher than the current price. The consensus rating is "Hold".

Price Target $21.40
Price Target Difference 133.88%
Analyst Consensus Hold
Analyst Count 6
Revenue Growth Forecast (3Y) 118.54%
EPS Growth Forecast (3Y) n/a
Stock Forecasts

Fair Value

There are several formulas that can be used to estimate the intrinsic value of a stock.

Lynch Fair Value n/a
Lynch Upside n/a
Graham Number n/a
Graham Upside n/a

Stock Splits

This stock does not have any record of stock splits.

Last Split Date n/a
Split Type n/a
Split Ratio n/a

Scores

PRTA has an Altman Z-Score of 2.56 and a Piotroski F-Score of 2. A Z-score under 3 suggests an increased risk of bankruptcy.

Altman Z-Score 2.56
Piotroski F-Score 2