Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
9.05
-0.08 (-0.88%)
At close: Jan 8, 2026, 4:00 PM EST
9.15
+0.10 (1.10%)
Pre-market: Jan 9, 2026, 8:12 AM EST
Prothena Corporation Analyst Ratings
Total Analysts
9
Consensus Rating
Buy
Price Target
$18.86
Upside
+108.40%
Ratings History
| Analyst | Firm | Rating | Rating | Action | Price Target | Upside | Date |
|---|---|---|---|---|---|---|---|
| Citizens | Citizens | Buy Maintains $11 → $19 | Buy | Maintains | $11 → $19 | +109.94% | Dec 1, 2025 |
| HC Wainwright & Co. | HC Wainwright & Co. | Strong Buy Maintains $20 → $30 | Strong Buy | Maintains | $20 → $30 | +231.49% | Nov 7, 2025 |
| RBC Capital | RBC Capital | Hold Maintains $10 → $11 | Hold | Maintains | $10 → $11 | +21.55% | Nov 7, 2025 |
| Piper Sandler | Piper Sandler | Buy Maintains $15 → $36 | Buy | Maintains | $15 → $36 | +297.79% | Oct 28, 2025 |
| HC Wainwright & Co. | HC Wainwright & Co. | Strong Buy Maintains $14 → $20 | Strong Buy | Maintains | $14 → $20 | +120.99% | Oct 7, 2025 |
| JMP Securities | JMP Securities | Buy Maintains $29 → $11 | Buy | Maintains | $29 → $11 | +21.55% | Sep 2, 2025 |
| Piper Sandler | Piper Sandler | Buy Maintains $81 → $15 | Buy | Maintains | $81 → $15 | +65.75% | Aug 28, 2025 |
| Chardan Capital | Chardan Capital | Strong Buy Maintains $18 | Strong Buy | Maintains | $18 | +98.90% | Aug 28, 2025 |
| RBC Capital | RBC Capital | Hold Maintains $18 → $10 | Hold | Maintains | $18 → $10 | +10.50% | Aug 5, 2025 |
| HC Wainwright & Co. | HC Wainwright & Co. | Strong Buy Reiterates $14 | Strong Buy | Reiterates | $14 | +54.70% | Aug 5, 2025 |
| Chardan Capital | Chardan Capital | Strong Buy Maintains $18 | Strong Buy | Maintains | $18 | +98.90% | 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 | -55.80% | May 28, 2025 |
| Oppenheimer | Oppenheimer | Buy → Hold Downgrades n/a | Buy → Hold | Downgrades | n/a | n/a | May 27, 2025 |
| Piper Sandler | Piper Sandler | Buy Maintains $110 → $81 | Buy | Maintains | $110 → $81 | +795.03% | May 27, 2025 |
| JMP Securities | JMP Securities | Buy Maintains $78 → $29 | Buy | Maintains | $78 → $29 | +220.44% | 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
- Ratings provided within the past year contribute to a higher score.