Prothena Corp Public Ltd Co (PRTA) stock
PRTANasdaqPharmaceutical PreparationsFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 5, 2026Score 12/3017% below fair value
$8.16−0.07 (-0.85%)
Close on Nov 13, 2026Market cap $418.91MP/E –Yield –
Prothena Corp Public enterprise value
Enterprise value is market cap plus debt, minus cash: the value of the whole business to all its investors.
Prothena Corp Public's enterprise value was $163.53M on Nov 11, 2026, against $247.83M a year earlier. Over the last 5 years it ranged from -$170.87M to $2.94B, with a median of $633.37M.
Enterprise Value at the end of each year
| Period | Period end | Value | Change |
|---|---|---|---|
| 2026 | Nov 11, 2026 | $163.53M | -10.8% |
| 2025 | Dec 31, 2025 | $183.23M | -18.9% |
| 2024 | Dec 31, 2024 | $225.99M | -82.3% |
| 2023 | Dec 29, 2023 | $1.28B | -46.5% |
| 2022 | Dec 30, 2022 | $2.39B | +40.7% |
| 2021 | Dec 31, 2021 | $1.70B | +929.9% |
| 2020 | Dec 31, 2020 | $164.93M | -31.6% |
| 2019 | Dec 31, 2019 | $241.26M | – |
| 2018 | Dec 31, 2018 | -$40.92M | -104.2% |
| 2017 | Dec 29, 2017 | $985.18M | -23.2% |
| 2016 | Dec 30, 2016 | $1.28B | -27.1% |
| 2015 | Dec 31, 2015 | $1.76B | +570.7% |
| 2014 | Dec 31, 2014 | $262.29M | -28.5% |
| 2013 | Dec 31, 2013 | $366.99M | +245.4% |
| 2012 | Dec 31, 2012 | $106.26M | – |
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