Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
9.83
+0.42 (4.46%)
At close: May 22, 2026, 4:00 PM EDT
9.64
-0.19 (-1.93%)
After-hours: May 22, 2026, 4:17 PM EDT
Prothena Corporation Analyst Ratings
Total Analysts
6
Consensus Rating
Buy
Price Target
$19.13
Upside
+94.61%
Ratings History
| Analyst | Firm | Rating | Rating | Action | Price Target | Upside | Date |
|---|---|---|---|---|---|---|---|
| Citizens | Citizens | Buy Maintains $19 → $20 | Buy | Maintains | $19 → $20 | +103.46% | May 8, 2026 |
| RBC Capital | RBC Capital | Hold Maintains $11 → $12 | Hold | Maintains | $11 → $12 | +22.08% | Feb 20, 2026 |
| Citizens | Citizens | Buy Maintains $11 → $19 | Buy | Maintains | $11 → $19 | +93.29% | Dec 1, 2025 |
| HC Wainwright & Co. | HC Wainwright & Co. | Strong Buy Maintains $20 → $30 | Strong Buy | Maintains | $20 → $30 | +205.19% | Nov 7, 2025 |
| RBC Capital | RBC Capital | Hold Maintains $10 → $11 | Hold | Maintains | $10 → $11 | +11.90% | Nov 7, 2025 |
| Piper Sandler | Piper Sandler | Buy Maintains $15 → $36 | Buy | Maintains | $15 → $36 | +266.23% | Oct 28, 2025 |
| HC Wainwright & Co. | HC Wainwright & Co. | Strong Buy Maintains $14 → $20 | Strong Buy | Maintains | $14 → $20 | +103.46% | Oct 7, 2025 |
| JMP Securities | JMP Securities | Buy Maintains $29 → $11 | Buy | Maintains | $29 → $11 | +11.90% | Sep 2, 2025 |
| Piper Sandler | Piper Sandler | Buy Maintains $81 → $15 | Buy | Maintains | $81 → $15 | +52.59% | Aug 28, 2025 |
| Chardan Capital | Chardan Capital | Strong Buy Maintains $18 | Strong Buy | Maintains | $18 | +83.11% | Aug 28, 2025 |
| RBC Capital | RBC Capital | Hold Maintains $18 → $10 | Hold | Maintains | $18 → $10 | +1.73% | Aug 5, 2025 |
| HC Wainwright & Co. | HC Wainwright & Co. | Strong Buy Reiterates $14 | Strong Buy | Reiterates | $14 | +42.42% | Aug 5, 2025 |
| Chardan Capital | Chardan Capital | Strong Buy Maintains $18 | Strong Buy | Maintains | $18 | +83.11% | Aug 5, 2025 |
| Cantor Fitzgerald | Cantor Fitzgerald | Hold Reiterates n/a | Hold | Reiterates | n/a | n/a | Jun 20, 2025 |
| B of A Securities | B of A Securities | Hold → Sell Downgrades $22 → $4 | Hold → Sell | Downgrades | $22 → $4 | -59.31% | May 28, 2025 |
| Oppenheimer | Oppenheimer | Buy → Hold Downgrades n/a | Buy → Hold | Downgrades | n/a | n/a | May 27, 2025 |
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Analyst Star Rankings
Our analyst star rankings are based on these four factors
- Success Rate
- The percentage of ratings that are profitable.
- Average Return
- The average percentage return within one year of the rating.
- Rating Count
- The more ratings the analyst has provided, the higher the score.
- Recency
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