Prothena Corporation Statistics

Total Valuation

PRTA has a market cap or net worth of $506.54 million. The enterprise value is $144.89 million.

Market Cap	506.54M
Enterprise Value	144.89M

Important Dates

The next estimated earnings date is Tuesday, November 11, 2025, after market close.

Earnings Date	Nov 11, 2025
Ex-Dividend Date	n/a

Share Statistics

PRTA has 53.83 million shares outstanding. The number of shares has increased by 0.25% in one year.

Current Share Class	53.83M
Shares Outstanding	53.83M
Shares Change (YoY)	+0.25%
Shares Change (QoQ)	n/a
Owned by Insiders (%)	19.25%
Owned by Institutions (%)	72.87%
Float	40.09M

Valuation Ratios

PE Ratio	n/a
Forward PE	n/a
PS Ratio	48.97
Forward PS	12.61
PB Ratio	1.56
P/TBV Ratio	1.56
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	14.01
EV / EBITDA	n/a
EV / EBIT	n/a
EV / FCF	n/a

Financial Position

The company has a current ratio of 5.68, with a Debt / Equity ratio of 0.03.

Current Ratio	5.68
Quick Ratio	5.48
Debt / Equity	0.03
Debt / EBITDA	n/a
Debt / FCF	n/a
Interest Coverage	n/a

Financial Efficiency

Return on equity (ROE) is -66.85% and return on invested capital (ROIC) is -33.53%.

Return on Equity (ROE)	-66.85%
Return on Assets (ROA)	-29.79%
Return on Invested Capital (ROIC)	-33.53%
Return on Capital Employed (ROCE)	-75.17%
Revenue Per Employee	$63,442
Profits Per Employee	-$1.86M
Employee Count	163
Asset Turnover	0.02
Inventory Turnover	n/a

Taxes

In the past 12 months, PRTA has paid $41.24 million in taxes.

Income Tax	41.24M
Effective Tax Rate	n/a

Stock Price Statistics

The stock price has decreased by -53.92% in the last 52 weeks. The beta is -0.04, so PRTA's price volatility has been lower than the market average.

Beta (5Y)	-0.04
52-Week Price Change	-53.92%
50-Day Moving Average	7.91
200-Day Moving Average	10.08
Relative Strength Index (RSI)	73.26
Average Volume (20 Days)	790,900

Short Selling Information

The latest short interest is 3.76 million, so 6.99% of the outstanding shares have been sold short.

Short Interest	3.76M
Short Previous Month	4.06M
Short % of Shares Out	6.99%
Short % of Float	9.39%
Short Ratio (days to cover)	3.92

Income Statement

In the last 12 months, PRTA had revenue of $10.34 million and -$302.92 million in losses. Loss per share was -$5.63.

Revenue	10.34M
Gross Profit	-181.88M
Operating Income	-249.00M
Pretax Income	-261.68M
Net Income	-302.92M
EBITDA	-248.10M
EBIT	-249.00M
Loss Per Share	-$5.63

Full Income Statement

Balance Sheet

The company has $371.44 million in cash and $9.78 million in debt, giving a net cash position of $361.65 million or $6.72 per share.

Cash & Cash Equivalents	371.44M
Total Debt	9.78M
Net Cash	361.65M
Net Cash Per Share	$6.72
Equity (Book Value)	324.33M
Book Value Per Share	6.03
Working Capital	317.67M

Full Balance Sheet

Cash Flow

In the last 12 months, operating cash flow was -$192.66 million and capital expenditures -$180,000, giving a free cash flow of -$192.84 million.

Operating Cash Flow	-192.66M
Capital Expenditures	-180,000
Free Cash Flow	-192.84M
FCF Per Share	-$3.58

Full Cash Flow Statement

Margins

Gross Margin	n/a
Operating Margin	-2,407.87%
Pretax Margin	-2,530.46%
Profit Margin	n/a
EBITDA Margin	n/a
EBIT Margin	n/a
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	-0.25%
Shareholder Yield	-0.25%
Earnings Yield	-59.80%
FCF Yield	-38.07%

Dividend Details

Analyst Forecast

The average price target for PRTA is $12.29, which is 30.61% higher than the current price. The consensus rating is "Buy".

Price Target	$12.29
Price Target Difference	30.61%
Analyst Consensus	Buy
Analyst Count	10
Revenue Growth Forecast (5Y)	-0.53%
EPS Growth Forecast (5Y)	-12.82%

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 0.79 and a Piotroski F-Score of 1. A Z-score under 3 suggests an increased risk of bankruptcy.

Altman Z-Score	0.79
Piotroski F-Score	1