Prothena Corporation plc (PRTA)
NASDAQ: PRTA · Real-Time Price · USD
9.36
-0.09 (-1.01%)
Aug 24, 2026, 12:44 PM EDT - Market open
Prothena Corporation Stock Forecast
Stock Price Forecast
According to 6 analysts polled by S&P Global, Prothena Corporation stock has a consensus rating of "Hold" and an average price target of $21.4. The average 1-year stock price forecast is 128.75% higher than the current stock price, while the lowest is $8.00 (-14.48%) and the highest is $36 (+284.82%).
Price Target: $21.4 (+128.75%)
Analyst Consensus: Hold
Price Target
ChartAnalyst Ratings
The average analyst rating for Prothena Corporation stock is "Hold". This means that analysts believe this stock is likely to perform similarly to the overall market.
Recommendation Trends
| Rating | Dec '25 | Feb '26 | Mar '26 | May '26 | Jul '26 | Aug '26 |
|---|---|---|---|---|---|---|
| Strong Buy | 2 | 2 | 1 | 1 | 1 | 1 |
| Buy | 2 | 2 | 2 | 2 | 2 | 2 |
| Hold | 2 | 2 | 2 | 2 | 2 | 2 |
| Sell | 1 | 1 | 1 | 1 | 1 | 1 |
| Strong Sell | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 7 | 7 | 6 | 6 | 6 | 6 |
Latest Forecasts
| Analyst | Firm | Rating | Rating | Action | Price Target | Upside | Date |
|---|---|---|---|---|---|---|---|
| Bank of America Securities | Bank of America Securities | Sell Maintains n/a | Sell | Maintains | n/a | n/a | Aug 14, 2026 |
| Piper Sandler | Piper Sandler | Buy Maintains $36 | Buy | Maintains | $36 | +284.82% | Aug 7, 2026 |
| RBC Capital | RBC Capital | Hold Maintains $13 | Hold | Maintains | $13 | +38.96% | Aug 7, 2026 |
| H.C. Wainwright | H.C. Wainwright | Buy Reiterates $30 | Buy | Reiterates | $30 | +220.68% | Aug 7, 2026 |
| Citizens JMP | Citizens JMP | Buy Maintains $19 → $20 | Buy | Maintains | $19 → $20 | +113.79% | May 8, 2026 |
Financial Forecast
Revenue This Year
83.16M
from 9.68M
Increased by 758.69%
Revenue Next Year
24.38M
from 83.16M
Decreased by -70.69%
EPS This Year
-0.55
from -3.98
EPS Next Year
-1.52
from -0.55
EPS and Forward PE are based on non-GAAP adjusted numbers.