As of 2025-09-18, the Relative Valuation of Prothena Corporation PLC (PRTA) is (72.45) USD. This relative valuation is based on P/E multiples. With the latest stock price at 8.06 USD, the upside of Prothena Corporation PLC based on Relative Valuation is -998.9%.
The range of the Relative Valuation is (71.24) - (73.49) USD.
Note: valuation result may not be accurate due to the company's negative earnings.
| Range | Selected | |
| Trailing P/E multiples | 12.6x - 13.1x | 12.8x |
| Forward P/E multiples | 12.7x - 13.1x | 12.9x |
| Fair Price | (71.24) - (73.49) | (72.45) |
| Upside | -983.9% - -1011.8% | -998.9% |
| Date | P/E |
| 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 |
| 2025-08-26 | -1.48 |
| 2025-08-25 | -1.49 |
| 2025-08-22 | -1.56 |
| 2025-08-21 | -1.52 |
| 2025-08-20 | -1.51 |
| 2025-08-19 | -1.51 |
| 2025-08-18 | -1.52 |
| 2025-08-15 | -1.47 |
| 2025-08-14 | -1.43 |
| 2025-08-13 | -1.43 |
| 2025-08-12 | -1.34 |
| 2025-08-11 | -1.36 |
| 2025-08-08 | -1.37 |
| 2025-08-07 | -1.37 |
| 2025-08-06 | -1.41 |
| 2025-08-05 | -1.25 |
| 2025-08-04 | -1.23 |
| 2025-08-01 | -1.21 |
| 2025-07-31 | -1.22 |
| 2025-07-30 | -1.22 |
| 2025-07-29 | -1.23 |
| 2025-07-28 | -1.22 |
| 2025-07-25 | -1.19 |
| 2025-07-24 | -1.19 |
| 2025-07-23 | -1.20 |
| 2025-07-22 | -1.16 |
| 2025-07-21 | -1.12 |
| 2025-07-18 | -1.11 |
| 2025-07-17 | -1.15 |
| 2025-07-16 | -1.12 |
| 2025-07-15 | -1.11 |
| 2025-07-14 | -1.14 |
| 2025-07-11 | -1.14 |
| 2025-07-10 | -1.17 |
| 2025-07-09 | -1.17 |
| 2025-07-08 | -1.16 |
| 2025-07-07 | -1.12 |
| 2025-07-03 | -1.14 |
| 2025-07-02 | -1.12 |