PRTAProthena Corporation plc
$8.21-17% 1Y
$8.21
$7.9152 weeks$11.51
Is the price fair?
What PRTA's price assumes
Prothena Corporation plc did not earn a profit over the last twelve months, so it has no trailing P/E and the price is measured against sales instead: 9.37× revenue.
9.37
Price / sales · no P/E: the last twelve months did not end in a profit
- Price / book
- 1.78
Price / book · as of 2026-Q2
Details›
- Price / bookas of 2026-Q2
- 1.78
- EV / EBIToperating margin −102%: the multiple describes the denominator
- not meaningful
- Market capitalisation51.3 million shares, counted Jul 30, 2026
- $421M
Multiples from SEC filings and end-of-day closes; implied growth from a reverse discounted cash flow. Group medians across the names Ryufin tracks.