Prothena Corporation plc (LON:0Y3M)

Prothena Corporation Statistics

Total Valuation

LON:0Y3M has a market cap or net worth of GBP 424.50 million. The enterprise value is 179.58 million.

Market Cap	424.50M
Enterprise Value	179.58M

Important Dates

The last earnings date was Thursday, November 6, 2025.

Earnings Date	Nov 6, 2025
Ex-Dividend Date	n/a

Share Statistics

Current Share Class	53.83M
Shares Outstanding	n/a
Shares Change (YoY)	+0.17%
Shares Change (QoQ)	+0.01%
Owned by Insiders (%)	19.39%
Owned by Institutions (%)	81.08%
Float	43.39M

Valuation Ratios

PE Ratio	n/a
Forward PE	n/a
PS Ratio	48.41
PB Ratio	1.93
P/TBV Ratio	1.93
P/FCF Ratio	n/a
P/OCF Ratio	n/a
PEG Ratio	n/a

Enterprise Valuation

EV / Earnings	-0.86
EV / Sales	20.02
EV / EBITDA	n/a
EV / EBIT	n/a
EV / FCF	-1.28

Financial Position

The company has a current ratio of 6.61, with a Debt / Equity ratio of 0.03.

Current Ratio	6.61
Quick Ratio	6.43
Debt / Equity	0.03
Debt / EBITDA	n/a
Debt / FCF	-0.05
Interest Coverage	n/a

Financial Efficiency

Return on equity (ROE) is -67.63% and return on invested capital (ROIC) is -32.69%.

Return on Equity (ROE)	-67.63%
Return on Assets (ROA)	-29.31%
Return on Invested Capital (ROIC)	-32.69%
Return on Capital Employed (ROCE)	-73.79%
Revenue Per Employee	53,792
Profits Per Employee	-1.28M
Employee Count	163
Asset Turnover	0.02
Inventory Turnover	n/a

Taxes

In the past 12 months, LON:0Y3M has paid 31.03 million in taxes.

Income Tax	31.03M
Effective Tax Rate	n/a

Stock Price Statistics

The stock price has decreased by -32.03% in the last 52 weeks. The beta is -0.11, so LON:0Y3M's price volatility has been lower than the market average.

Beta (5Y)	-0.11
52-Week Price Change	-32.03%
50-Day Moving Average	9.80
200-Day Moving Average	9.36
Relative Strength Index (RSI)	51.11
Average Volume (20 Days)	1,515

Short Selling Information

Short Interest	n/a
Short Previous Month	n/a
Short % of Shares Out	n/a
Short % of Float	n/a
Short Ratio (days to cover)	5.50

Income Statement

In the last 12 months, LON:0Y3M had revenue of GBP 8.77 million and -208.64 million in losses. Loss per share was -3.88.

Revenue	8.77M
Gross Profit	-118.03M
Operating Income	-165.34M
Pretax Income	-177.62M
Net Income	-208.64M
EBITDA	-164.67M
EBIT	-165.34M
Loss Per Share	-3.88

Balance Sheet

The company has 246.13 million in cash and 6.76 million in debt, giving a net cash position of 239.37 million.

Cash & Cash Equivalents	246.13M
Total Debt	6.76M
Net Cash	239.37M
Net Cash Per Share	n/a
Equity (Book Value)	219.45M
Book Value Per Share	4.08
Working Capital	214.65M

Cash Flow

In the last 12 months, operating cash flow was -139.89 million and capital expenditures -134,653, giving a free cash flow of -140.03 million.

Operating Cash Flow	-139.89M
Capital Expenditures	-134,653
Free Cash Flow	-140.03M
FCF Per Share	n/a

Margins

Gross Margin	n/a
Operating Margin	-1,885.68%
Pretax Margin	-2,025.72%
Profit Margin	n/a
EBITDA Margin	n/a
EBIT Margin	n/a
FCF Margin	n/a

Dividends & Yields

LON:0Y3M 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	-0.17%
Shareholder Yield	-0.17%
Earnings Yield	-49.15%
FCF Yield	-32.99%

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

LON:0Y3M has an Altman Z-Score of -0.02 and a Piotroski F-Score of 1. A Z-score under 3 suggests an increased risk of bankruptcy.

Altman Z-Score	-0.02
Piotroski F-Score	1