Aldeyra Therapeutics (ALDX) vs Alterity Therapeutics (ATHE)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 8, 2026.
Summary
Alterity Therapeutics (ATHE) has outperformed Aldeyra Therapeutics (ALDX) over the past year, losing 22.4% versus a loss of 82.9%. Over five years, ATHE leads with a -74.7% price change compared with -88.5% for ALDX. Alterity Therapeutics is the larger company by market cap ($60.5 million vs $57.8 million), about 1.0 times the size.
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | ALDX | ATHE |
|---|---|---|
| Share price | $0.9586 | $3.32 |
| Market cap | $57.83M | $60.45M |
| 1-day change | +4.66% | -1.48% |
| YTD return | -81.49% | +7.79% |
| 1-year return | -82.91% | -22.43% |
| 5-year return | -88.51% | -74.66% |
| EPS (TTM) | $-0.38 | $-0.89 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $5.93 | $5.89 |
| 52-week low | $0.862 | $2.66 |
| Distance from 52-week high | -83.83% | -43.63% |
| Average volume | 1.19M | 16.28K |
| Shares outstanding | 60.33M | 18.21M |
| Sector | Health Care | Health Care |
| Industry | Biotechnology: Pharmaceutical Preparations | Biotechnology: Pharmaceutical Preparations |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- ATHE has outperformed ALDX by 60.5 percentage points over the past year.
ALDX vs ATHE FAQ
Which is bigger, Aldeyra Therapeutics or Alterity Therapeutics?
Alterity Therapeutics (ATHE) is larger, with a market capitalization of $60.45M compared with $57.83M for Aldeyra Therapeutics (ALDX).
Which stock has performed better over the past year, ALDX or ATHE?
ATHE returned -22.43% over the past 12 months, compared with -82.91% for ALDX (price return, excluding dividends). Past performance does not predict future results.
Are Aldeyra Therapeutics and Alterity Therapeutics in the same industry?
Yes. Both are classified in the Biotechnology: Pharmaceutical Preparations industry within the Health Care sector.