Prothena Corporation plc (PRTA)
NASDAQ · Healthcare
Prothena Corporation plc Stock Price History 2012–2025
Prothena Corporation plc
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Historical daily closing price for Prothena Corporation plc since 2012, adjusted for splits and dividends. The latest closing stock price for Prothena Corporation plc as of June 11, 2026 is 8.07.
- The all-time high Prothena Corporation plc stock closing price was 78.89 on September 23, 2021.
- The Prothena Corporation plc 52-week high stock price is 11.51, which is 42.5% above the current share price.
- The Prothena Corporation plc 52-week low stock price is 5.07, which is 37.2% below the current share price.
- The average Prothena Corporation plc stock price for the last 52 weeks is 9.05.
Annual Close Price
YEAR-END CLOSE · USD
ANNUAL % CHANGE · %
| Year | Average | Year Open | Year High | Year Low | Year Close | Annual % Change |
|---|---|---|---|---|---|---|
| 2026 | 9.57 | 9.20 | 11.51 | 7.91 | 8.07 | -15.45% |
| 2025 | 9.83 | 13.67 | 16.04 | 4.58 | 9.55 | -31.05% |
| 2024 | 22.08 | 38.54 | 40.66 | 11.95 | 13.85 | -61.89% |
| 2023 | 53.77 | 53.50 | 78.59 | 32.31 | 36.34 | -39.68% |
| 2022 | 38.89 | 49.22 | 65.00 | 22.73 | 60.25 | +21.96% |
| 2021 | 42.21 | 12.30 | 78.89 | 11.00 | 49.40 | +311.32% |
| 2020 | 11.77 | 15.63 | 15.77 | 7.54 | 12.01 | -24.13% |
| 2019 | 10.57 | 10.50 | 17.01 | 6.89 | 15.83 | +53.69% |
| 2018 | 20.48 | 37.80 | 45.04 | 8.73 | 10.30 | -72.53% |
| 2017 | 54.51 | 49.79 | 67.75 | 35.44 | 37.49 | -23.79% |
| 2016 | 47.96 | 62.22 | 67.64 | 30.12 | 49.19 | -27.78% |
Prothena Corporation plc Stock Price History — FAQ
Prothena Corporation plc (PRTA) stock price history over the last 14 years — annual and quarterly figures with year-over-year growth and charts.
Where can I see PRTA's stock price history history?
The chart and table above show Prothena Corporation plc's stock price history by year and by quarter, including the growth rate.