As of 2025-11-07, the Relative Valuation of Prothena Corporation PLC (PRTA) is (86.52) USD. This relative valuation is based on P/E multiples. With the latest stock price at 10.08 USD, the upside of Prothena Corporation PLC based on Relative Valuation is -958.3%.
The range of the Relative Valuation is (85.65) - (87.56) USD.
Note: valuation result may not be accurate due to the company's negative earnings.
| Range | Selected | |
| Trailing P/E multiples | 15.1x - 15.6x | 15.4x |
| Forward P/E multiples | 15.2x - 15.6x | 15.4x |
| Fair Price | (85.65) - (87.56) | (86.52) |
| Upside | -949.7% - -968.7% | -958.3% |
| Date | P/E |
| 2025-11-05 | -1.83 |
| 2025-11-04 | -1.82 |
| 2025-11-03 | -1.87 |
| 2025-10-31 | -1.91 |
| 2025-10-30 | -1.86 |
| 2025-10-29 | -1.89 |
| 2025-10-28 | -1.87 |
| 2025-10-27 | -1.84 |
| 2025-10-24 | -1.75 |
| 2025-10-23 | -1.73 |
| 2025-10-22 | -1.76 |
| 2025-10-21 | -1.82 |
| 2025-10-20 | -1.84 |
| 2025-10-17 | -1.76 |
| 2025-10-16 | -1.79 |
| 2025-10-15 | -1.89 |
| 2025-10-14 | -1.80 |
| 2025-10-13 | -1.84 |
| 2025-10-10 | -1.79 |
| 2025-10-09 | -1.83 |
| 2025-10-08 | -1.84 |
| 2025-10-07 | -1.81 |
| 2025-10-06 | -1.75 |
| 2025-10-03 | -1.76 |
| 2025-10-02 | -1.78 |
| 2025-10-01 | -1.76 |
| 2025-09-30 | -1.73 |
| 2025-09-29 | -1.73 |
| 2025-09-26 | -1.67 |
| 2025-09-25 | -1.66 |
| 2025-09-24 | -1.66 |
| 2025-09-23 | -1.48 |
| 2025-09-22 | -1.47 |
| 2025-09-19 | -1.43 |
| 2025-09-18 | -1.45 |
| 2025-09-17 | -1.43 |
| 2025-09-16 | -1.45 |
| 2025-09-15 | -1.45 |
| 2025-09-12 | -1.46 |
| 2025-09-11 | -1.50 |
| 2025-09-10 | -1.48 |
| 2025-09-09 | -1.48 |
| 2025-09-08 | -1.51 |
| 2025-09-05 | -1.52 |
| 2025-09-04 | -1.46 |
| 2025-09-03 | -1.49 |
| 2025-09-02 | -1.47 |
| 2025-08-29 | -1.46 |
| 2025-08-28 | -1.46 |
| 2025-08-27 | -1.52 |