Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
9.41
+0.05 (0.53%)
At close: Sep 26, 2025, 4:00 PM EDT
9.35
-0.06 (-0.64%)
After-hours: Sep 26, 2025, 7:53 PM EDT
Prothena Corporation Market Cap
Prothena Corporation has a market cap or net worth of $506.54 million as of September 26, 2025. Its market cap has decreased by -55.00% in one year.
Market Cap
506.54M
Enterprise Value
144.89M
1-Year Change
-55.00%
Ranking
Category
Stock Price
$9.41
Market Cap Chart
Since December 21, 2012, Prothena Corporation's market cap has increased from $127.30M to $506.54M, an increase of 297.91%. That is a compound annual growth rate of 11.42%.
Market Cap History
| Date | Market Cap | % Change |
|---|---|---|
| Sep 26, 2025 | 506.50M | -32.04% |
| Dec 31, 2024 | 745.30M | -61.78% |
| Dec 29, 2023 | 1.95B | -33.09% |
| Dec 30, 2022 | 2.91B | 26.63% |
| Dec 31, 2021 | 2.30B | 380.02% |
| Dec 31, 2020 | 479.50M | -24.08% |
| Dec 31, 2019 | 631.60M | 53.82% |
| Dec 31, 2018 | 410.60M | -71.51% |
| Dec 29, 2017 | 1.44B | -15.04% |
| Dec 30, 2016 | 1.70B | -20.98% |
| Dec 31, 2015 | 2.15B | 277.66% |
| Dec 31, 2014 | 568.50M | -1.92% |
| Dec 31, 2013 | 579.60M | 347.22% |
| Dec 31, 2012 | 129.60M | 1.81% |
| Dec 21, 2012 | 127.30M | - |
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Market Capitalization
Market capitalization, also called net worth, is the total value of all of a company's outstanding shares. It is calculated by multiplying the stock price by the number of shares outstanding.
Formula: Market Cap = Stock Price * Shares Outstanding
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