Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
8.16
-0.07 (-0.85%)
At close: Nov 13, 2026, 4:00 PM EST
8.16
0.00 (0.00%)
After-hours: Nov 13, 2026, 7:45 PM EST
Prothena Corporation Market Cap
Prothena Corporation has a market cap or net worth of $419.01 million as of November 13, 2026. It is the 15,597th most valuable company in the world and the 2,836th biggest in the United States. Its market cap has decreased by 28.26% in one year.
Market Cap
419.01M
Enterprise Value
153.90M
1-Year Change
-28.26%
Global Rank
Country Rank
#2,836 United States
Category
ChartMarket Cap Chart
Since December 21, 2012, Prothena Corporation's market cap has increased from $127.30M to $419.01M, an increase of 229.16%. That is a compound annual growth rate of 8.95%.
| Date | Market Cap | % Change |
|---|---|---|
| Nov 13, 2026 | 419.00M | -18.50% |
| Dec 31, 2025 | 514.10M | -31.02% |
| 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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