Prothena Corp. PLC (0Y3M)
London Exchange · UK · prices in USD · close of 23 Oct 2026
Key indicators
| Last close | USD 8.250 |
|---|---|
| 52-week range | 7.818 – 11.668 |
| Return, 1 month / 3 months | −4.8% / −4.2% |
| Return, 1 year / 3 years | −17.0% / −80.9% |
| Trend | Below its 200-day average |
| RSI (14) | 46 |
| Volatility (1 year) | 49.4% |
| Worst drawdown (1 year) | -30.0% |
| Average daily value traded | 0.01M USD |
| Dividend yield | – |
Market X-Ray price-based
Five-year price chart navy: price · brown: 200-day average
About the company
Prothena Corp. PLC is a clinical-stage biotechnology company based in Dublin, Ireland, that researches and develops antibody-based medicines for serious diseases. Its work focuses on neurodegenerative conditions such as Parkinson's disease and Alzheimer's disease, and on rare peripheral amyloid disorders including AL amyloidosis. The company designs protein-targeting therapies intended to interfere with the disease processes rather than only relieve symptoms. Its customers and partners are mainly pharmaceutical companies, clinical researchers and healthcare providers involved in developing and delivering treatments for these patient groups.
The shares are listed on the London Exchange in UK under the code 0Y3M, and the price on this page is in US dollars (USD). Our records, which start in 2019, show no dividend payments for it. The Market X-Ray on this page is price-based and compares it with other stocks on the same exchange; it does not measure how healthy the business is.
Summary
Prothena Corp. PLC (0Y3M) trades on the London Exchange in UK. It last closed at USD 8.250 on 23 October 2026.
Its price-based Market X-Ray is 29 out of 100 (a weak price profile), ranking 3,124 of 3,787 stocks on this exchange. The score describes how the stock has traded: trend, momentum, risk, liquidity and dividends, each ranked against the other stocks on its own exchange. It does not measure how healthy or cheap the business is.
Over the last year the price fell 17.0% and over the last three months it fell 4.2%. Returns are price returns, dividends not included.
Fundamental measures (valuation, growth, financial health) are not shown: we do not yet hold financial statements for this market.
The five lenses in numbers each metric is ranked against the other stocks on London Exchange
| Lens and metric | Value | Score | Reading |
|---|---|---|---|
| Trend | 30 · Weak | Below its long-term averages and far from its highs. | |
| Above 200-day average | -10.7% | ||
| From 52-week high | -27.3% | ||
| Momentum | 28 · Weak | Lagging most stocks on this exchange. | |
| 3-month return | -4.2% | ||
| 6-month return | -24.3% | ||
| 12-month return, skipping the last month | -12.8% | ||
| Stability (higher is calmer) | 38 · Weak | Volatile, with deep drawdowns. | |
| Volatility, 1 year (lower is calmer) | 49.4% | ||
| Worst drawdown, 1 year (smaller is calmer) | -30.0% | ||
| Liquidity | 12 · Weak | Thinly traded: prices can jump and exits can be hard. | |
| Average daily value traded | 0.01M USD | ||
| Zero-volume days | 0.0% | ||
| Income | – | Pays no dividend. | |
| Dividend yield | – | ||
| Years with dividends | 0 |
Strengths
No lens stands out as a clear strength against its exchange.
Weak spots
- Trend: Below its long-term averages and far from its highs.
- Momentum: Lagging most stocks on this exchange.
- Stability (higher is calmer): Volatile, with deep drawdowns.
- Liquidity: Thinly traded: prices can jump and exits can be hard.
Returns
| 1 week | −1.1% |
|---|---|
| 1 month | −4.8% |
| 3 months | −4.2% |
| 6 months | −24.3% |
| 1 year | −17.0% |
| 3 years | −80.9% |
| 5 years | −86.4% |
Signals
| 50-day / 200-day average | 8.772 / 9.236 |
|---|---|
| Golden / death cross (60 days) | None |
| New 52-week high | No |
| Bullish RSI divergence | No |
| Average daily range (ATR) | 0.336 |
Technical summary
How to read this report
Every number comes from end-of-day prices and dividends. The Market X-Ray describes how the stock has traded, ranked against the other stocks on London Exchange; it does not measure how healthy or cheap the business is. The fundamental X-Ray (financial health, valuation, growth) needs financial statements, which we hold today for US stocks. See the methodology page. Educational only, not financial advice.