Prothena Corp PLC is a clinical biotechnology company that focuses on protein dysregulation and a pipeline of investigational therapeutics with the potential to change the course of devastating neurodegenerative and rare and peripheral amyloid diseases. The company's clinical pipeline of antibody-based product candidates targets a range of indications, including Amyloid Light-chain (AL) amyloidosis (NEOD001), Parkinson's disease and other related synucleinopathies (PRX002), and inflammatory diseases, including ATTR amyloidosis [Coramitug (PRX004)], Alzheimer's disease (PRX123), Neurodegeneration (PRXPRX019), and Others.
Quick Stats
May 15, 202655.5
AI Score
HOLD1.55
Volume Ratio
May 13, 2026
Next Earnings
17
+ve Days (30d)
13
-ve Days (30d)
PRTA Stock Summary
Last updated May 15, 2026
PRTA is currently trading at $9.76, positioned above its 200-day moving average of $9.52, indicating a long-term uptrend. The stock has a 52-week range of $4.32 to $11.8.
Technical Analysis: The 50-day moving average stands at $10.05, which is above the current price, indicating bearish near-term pressure. The RSI (Relative Strength Index) reads 42.962, suggesting the stock is neutral with balanced momentum.
Money Flow Indicators: The Chaikin Money Flow (20-day) is -0.117, which is negative, suggesting distribution or selling pressure. Our AI-powered investment score rates PRTA at 55.5/100 with a HOLD recommendation.
PRTA (Prothena Corporation plc Ordinary Shares) Indicators
Last updated May 15, 2026
| Indicator | Value |
|---|---|
| RSI(14) | 42.962 |
| CMF (20) | -0.117 |
| ROC (10) | -8.271 |
| ADX (14) | 20.997 |
| Indicator | Value |
|---|---|
| MACD (12,26,9) | -0.111 |
| AROONOSC (14) | -21.429 |
| WILLAMS %R (14) | -80.952 |
| MFI (14) | 40.551 |
PRTA Technical Chart
- Candlesticks: Green = price up, Red = price down. Body shows open/close, wicks show high/low.
- SMAs: Moving averages help identify trends. Price above SMA = bullish, below = bearish.
- Options OI: Shows max open interest strikes. High OI = significant price levels.
- Volume Profile: Shows price levels with most trading activity. POC = Point of Control (highest volume).
- Earnings: Vertical lines mark earnings dates. Watch for volatility around these dates.
- Gamma Walls: Key support/resistance from options gamma exposure. Orange = resistance above, Purple = support below.
- Fibonacci Retracement: Auto-calculated support/resistance levels based on recent high/low. Key levels: 23.6%, 38.2%, 50%, 61.8%, 78.6%.
- Unusual Activity: Highlights days with abnormal volume (2x+ average) or large price moves (5%+). Red marker = unusual activity detected.
Technical Indicators
Select indicators above to analyze technical patterns
Indicators will appear below the price chart with perfectly aligned datesVolume Profile Analysis
Horizontal histogram showing volume distribution at each price level with buying/selling pressure
PRTA Price vs Max Options Open Interest
PRTA Max Change In Options Open Interest
PRTA Options - Sort by Max open Interest (near term)
18th May 2026 (Data is delayed in normal mkt. hours)
| Type | Expiration | Strike | OI | Change in OI |
Volume | Ask | PC | Delta | Vega | Volatility | % change | Track |
|---|
PRTA Daily Out of Money Options - Sort by Max open Interest (near term)
18th May 2026 (Data is delayed in normal mkt. hours)
| Type | Expiration | Strike | OI | Change in OI |
Volume | Ask | PC | Delta | Vega | Volatility | % change | Track |
|---|
PRTA Daily In the Money Options - Sort by Max open Interest (near term)
18th May 2026 (Data is delayed in normal mkt. hours)
| Type | Expiration | Strike | OI | Change in OI |
Volume | Ask | PC | Delta | Vega | Volatility | % change | Track |
|---|
PRTA Most Active Options by Volume(near term)
18th May 2026 (Data is delayed in normal mkt. hours)
| Type | Expiration | Strike | Volume | OI | Change in OI |
Ask | PC | Delta | Vega | Volatility | % change | Track |
|---|
Prothena Corporation plc Ordinary Shares is not trading above both 50 Day and 200 Day SMA which is considered Bearish.
PRTA Moving Averages Analysis
Prothena Corporation plc Ordinary Shares has been above 200 day sma 1 times in last 30 days. Last time it was above 200 day sma was on May 15, 2026
PRTA (Prothena Corporation plc Ordinary Shares) Simple Moving Averages
Moving Averages are last updated May 15, 2026
| Days | MA |
|---|---|
| 10 | 10.27 |
| 20 | 10.56 |
| 30 | 10.55 |
| 50 | 10.05 |
| 100 | 9.62 |
| 200 | 9.52 |
PRTA Fundamental Analysis
| P/E (Forward) | 11.7925 |
| P/E (Trailing) | -- |
| Market Cap ($) | 516.2 million |
| Earnings/Share ($) | -2.81 |
| Net Proft Margin (%) | -2.6092 |
| Dividend/Share ($) | -- |
| EPS Estimate Current Year ($) | 0.05 |
| EPS Estimate Next Year ($) | -1.31 |
| WallStreet Target Price ($) | 21.4 |
| Most Recent Quarter |