As of 2026-03-21, the Fair Value of Prothena Corporation PLC (PRTA) is -22.67 USD. This value is based on the Peter Lynch's Fair Value formula. With the current market price of 8.75 USD, the upside of Prothena Corporation PLC is -359.11%.
With the market price of 8.75 USD and our fair value calculation, Prothena Corporation PLC (PRTA) is not a good investment. Investing in PRTA stocks now will result in a potential loss of 359.11%.
Note: valuation result may not be accurate due to the company's negative EPS.
Peter Lynch's formula is:
The earnings growth rate we use in the formula is the average growth rate of net income/earnings over the last 5 years. If the average growth rate is smaller than 5%, we set it to 5%. If it is larger than 25%, we set it to 25%. If the TTM EPS is negative, Peter Lynch Fair Value's result can be unreliable.
| Historical Earnings | ||||||
| 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-12-31 | 5Y Avg | |
| Net income | 67.00 | -116.90 | -147.03 | -122.31 | -244.09 | -112.67 |
| YoY growth | 160.31% | -274.48% | -25.77% | 16.81% | -99.57% | -44.54% |
| Market Cap (mil) | 471.01 |
| P/E | |
| Forward P/E |
| EPS | -4.53 |
| Avg earnings growth rate | -44.54% |
| TTM earnings | -244.09 |