As of 2026-04-07, the Relative Valuation of Prothena Corporation PLC (PRTA) is (67.90) USD. This relative valuation is based on P/E multiples. With the latest stock price at 10.04 USD, the upside of Prothena Corporation PLC based on Relative Valuation is -776.3%.
The range of the Relative Valuation is (50.06) - (85.97) USD.
Note: valuation result may not be accurate due to the company's negative earnings.
| Range | Selected | |
| Trailing P/E multiples | 9.8x - 20.1x | 15.0x |
| Forward P/E multiples | 11.0x - 19.0x | 15.0x |
| Fair Price | (50.06) - (85.97) | (67.90) |
| Upside | -598.6% - -956.3% | -776.3% |
| Date | P/E |
| 2026-04-06 | -2.20 |
| 2026-04-02 | -2.17 |
| 2026-04-01 | -2.21 |
| 2026-03-31 | -2.14 |
| 2026-03-30 | -2.04 |
| 2026-03-27 | -2.04 |
| 2026-03-26 | -2.10 |
| 2026-03-25 | -2.05 |
| 2026-03-24 | -1.93 |
| 2026-03-23 | -1.95 |
| 2026-03-20 | -1.93 |
| 2026-03-19 | -1.88 |
| 2026-03-18 | -1.89 |
| 2026-03-17 | -1.98 |
| 2026-03-16 | -2.02 |
| 2026-03-13 | -2.03 |
| 2026-03-12 | -2.05 |
| 2026-03-11 | -2.11 |
| 2026-03-10 | -2.15 |
| 2026-03-09 | -2.16 |
| 2026-03-06 | -2.11 |
| 2026-03-05 | -2.09 |
| 2026-03-04 | -2.17 |
| 2026-03-03 | -2.06 |
| 2026-03-02 | -2.07 |
| 2026-02-27 | -1.91 |
| 2026-02-26 | -1.91 |
| 2026-02-25 | -1.96 |
| 2026-02-24 | -1.98 |
| 2026-02-23 | -2.00 |
| 2026-02-20 | -1.99 |
| 2026-02-19 | -1.99 |
| 2026-02-18 | -2.00 |
| 2026-02-17 | -1.98 |
| 2026-02-13 | -1.98 |
| 2026-02-12 | -1.95 |
| 2026-02-11 | -1.97 |
| 2026-02-10 | -1.98 |
| 2026-02-09 | -1.95 |
| 2026-02-06 | -1.96 |
| 2026-02-05 | -1.84 |
| 2026-02-04 | -1.96 |
| 2026-02-03 | -1.94 |
| 2026-02-02 | -1.96 |
| 2026-01-30 | -1.94 |
| 2026-01-29 | -2.00 |
| 2026-01-28 | -2.02 |
| 2026-01-27 | -2.15 |
| 2026-01-26 | -2.19 |
| 2026-01-23 | -2.21 |