Prothena Corporation plc
Prothena Corporation plc (PRTA) Stock Forecast & Analyst Price Target
Wall Street consensus, 12-month price targets, model projections, and EPS/revenue estimates — from analyst data and price history.
prta · stock forecast · 28 analysts (3M) · FMP · updated Jun 8, 2026
Analyst Rating & Consensus
Based on 28 Wall Street analysts in the past 3 months
Buy
28 analysts
consensus
Rating Breakdown
12-Month Price Target
High
$19.00
Consensus
$19.00
+122.0% upside
Low
$19.00
Median: $19 · Last Close: $8.56
12-Month Price Target Forecast
Historical closing prices + analyst 12-month price target forecast cone
Short-Term Price Prediction
Algorithmically generated · Updated daily
| Date | Predicted Price | Change |
|---|---|---|
| 2026-06-09 | $8.22 | ↓ 4.00% |
1-day model range: $8.16–$8.28. Peak: $8.28 (-4.00%).
Long-Term Stock Price Prediction
Annual stock price forecast · 2027 / 2028 / 2029 / 2030 / 2031
| Year | Avg Price | Change |
|---|---|---|
| 2027 | $4 | -50.0% |
| 2028 | $3 | -63.8% |
| 2029 | $3 | -69.2% |
| 2030 | $2 | -71.8% |
| 2031 | — | -73.1% |
Stock Forecast Based on Technical Analysis
14 TA signals (SMA×6 + EMA×6 + RSI + MACD) · EEAT method transparency
Market Sentiment
BEARISH
Based on 14 technical indicators
Refreshes daily from EOD close
Moving Averages · PRTA · Jun 8, 2026
Latest Analyst Ratings & Upgrades
| Date | Brokerage | Action | Rating |
|---|---|---|---|
| 2026-05-08 | Citizens | Maintains | Market Outperform→Market Outperform |
| 2026-02-20 | RBC Capital | Maintains | Sector Perform→Sector Perform |
| 2025-12-01 | Citizens | Maintains | Market Outperform→Market Outperform |
| 2025-11-07 | HC Wainwright & Co. | Maintains | Buy→Buy |
| 2025-11-07 | RBC Capital | Maintains | Sector Perform→Sector Perform |
| 2025-10-28 | Piper Sandler | Maintains | Overweight→Overweight |
| 2025-10-07 | HC Wainwright & Co. | Maintains | Buy→Buy |
| 2025-09-02 | JMP Securities | Maintains | Market Outperform→Market Outperform |
| 2025-08-28 | Piper Sandler | Maintains | Overweight→Overweight |
| 2025-08-28 | Chardan Capital | Maintains | Buy→Buy |
Wall Street analysts have recently issued updated ratings on Prothena Corporation plc (PRTA) stock. Of the recent 142 rating actions, 6 were upgrades and 12 were downgrades. 28 analysts currently cover PRTA.
Analyst Recommendation Trends
PRTA analyst recommendation trends show stable buy-side sentiment over the past 6 months. Buy rating actions changed from 1 to 1 per month.
Financial Forecast: EPS & Revenue Estimates
Revenue This Year
$83M
↓ 38.2% YoY
Revenue Next Year
$26M
↓ 68.3% YoY
EPS This Year
$0.05
EPS Next Year
$-1.03
↓ 2307.1% YoY
EPS ForecastReported vs Estimated
Analysts forecast PRTA EPS of $0.05 for the current fiscal year, based on estimates from 4 analysts. The PRTA revenue forecast is $83M for the current year. These are analyst consensus estimates via FMP / S&P Global.
About Forecast & Price Prediction
The PRTA stock forecast is supported by two independent data sources: analyst consensus ratings from 28 Wall Street analysts (S&P Global / FMP), and technical analysis calculated from historical EOD price data. The consensus PRTA price target is $19.00 (+122.0% upside), with an analyst consensus of Buy.
The PRTA short-term stock prediction for tomorrow is $8.22 (-4.00%). The PRTA stock price prediction for 2027 estimates an average of $4. The PRTA stock prediction for 2030 projects a range of $2–$3.
Prothena Corporation plc trades on NASDAQ under the ticker PRTA. The PRTA stock outlook for 2027 is broadly positive, supported by a Buy consensus among 71% of covering analysts.
Frequently asked questions
PRTA forecast · 8 questionsAccording to 28 Wall Street analysts, the average 12-month PRTA price target is $19.00, with a high forecast of $19.00 and a low of $19.00. The median price target is shown in the chart above when available. This implies +122.0% potential upside from the current price of $8.56.
· Analyst data: Financial Modeling Prep (FMP) · S&P Global Market Intelligence · Technical analysis: FMP /historical-price-eod/light · Updated: Hourly (analyst) · Daily (technical)
⚠ This information is provided for informational purposes only and does not constitute investment advice. Short-term and long-term price predictions are algorithmically generated and carry significant uncertainty. Past performance does not guarantee future results. Always conduct your own due diligence before making investment decisions.