Alkermes plc (ALKS) vs Prothena Corporation plc (PRTA)
The same free fields, in the same order, for both companies, so a figure on one line can be read straight across.
This page states measurements and nothing else. It does not rank the two companies, name one of them, or draw a conclusion from the figures.
Data as of Oct 27, 2026, for both companies.
The figures, field by field
A dash means the snapshot carries no figure for that company on that line. A line is dropped only when neither company has it, so a dash beside a figure is a fact about coverage, not about either company.
| ALKS | PRTA | |
|---|---|---|
| Sector | Healthcare | Healthcare |
| Industry | Drug Manufacturers - Specialty & Generic | Biotechnology |
| Size band | MID | SMALL |
| Listing | Nasdaq GS | Nasdaq GS |
| Country | Ireland | Ireland |
| Theme | neuroscience | neuroscience |
| Price and returns | ||
| Last close | $44.44 | $8.40 |
| Return · 1 week | +3.42% | −0.94% |
| Return · 1 month | +10.68% | −3.67% |
| Return · 3 months | −12.00% | −1.87% |
| Return · year to date | +57.25% | −8.70% |
| Return · 1 year | +49.53% | −19.00% |
| Distance from the 52-week highThe last close measured against the highest close of the past 52 weeks. | −20.17% | −28.81% |
| 52-week high | $55.67 | $11.80 |
| 52-week low | $27.00 | $7.73 |
| Size and turnover | ||
| Market value · USDConverted to US dollars, so two companies listed in different currencies sit under one heading. | $7.46B | $431.23M |
| Turnover · median day, USDThe median value traded in a session over the past 50 sessions. | $69.27M | $3.19M |
| Employees | 2,050 | 67 |
| Valuation | ||
| Price to earnings · trailing | 108.47× | n/a (negative earnings) |
| Price to earnings · forward | 22.80× | n/a (negative forward earnings) |
| Price to sales | 4.15× | 7.72× |
| Price to book | 3.82× | 1.48× |
| Enterprise value to EBITDA | 27.48× | n/a (negative EBITDA) |
| Enterprise value to revenue | 4.70× | 2.56× |
| PEG ratio | 1.96 | — |
| Earnings per share · trailing | 0.38 | -0.82 |
| Profitability | ||
| Gross margin | 84.56% | — |
| Operating margin | 15.50% | −1850.20% |
| Profit margin | 3.97% | −80.67% |
| Return on equity | 3.85% | −14.40% |
| Return on assets | 4.20% | −10.67% |
| Growth | ||
| Revenue growth | +27.00% | −77.10% |
| Earnings growth | −99.40% | — |
| Balance sheet and payout | ||
| Debt / equity (%) | 86.95 | 2.44 |
| Current ratio | 2.30 | 25.05 |
| Dividend yield | 0.00% | 0.00% |
| Payout ratio | 0.00% | 0.00% |
| Trend and volatility | ||
| RSI · 14 | 57.78 | 48.34 |
| ADX · 14 | 25.58 | 11.54 |
| 50-day average | $44.40 | $8.78 |
| 200-day average | $40.17 | $9.24 |
| Average true range · share of priceAverage true range over 14 sessions, stated as a share of the last close, so it can be read across two share prices. | 3.31% | 4.90% |
The full ALKS analysis
Everything this table leaves out for Alkermes plc: the plain-language summary and key points, the accumulation read, signal history, full fundamentals, market context, and the case each side of the ALKS argument makes.
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Open the full ALKS analysisThe full PRTA analysis
Everything this table leaves out for Prothena Corporation plc: the plain-language summary and key points, the accumulation read, signal history, full fundamentals, market context, and the case each side of the PRTA argument makes.
$9.90 per stock, one time, 30 days of access.
Open the full PRTA analysis