Amphastar Pharmaceuticals (AMPH) vs Janux Therapeutics (JANX)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 7, 2026.
Summary
Amphastar Pharmaceuticals (AMPH) has outperformed Janux Therapeutics (JANX) over the past year, losing 1.1% versus a loss of 21.0%. Over five years, AMPH leads with a +33.6% price change compared with -15.2% for JANX. Janux Therapeutics is the larger company by market cap ($1.10 billion vs $1.09 billion), 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 | AMPH | JANX |
|---|---|---|
| Share price | $25.54 | $17.92 |
| Market cap | $1.09B | $1.10B |
| 1-day change | -1.43% | +6.73% |
| YTD return | -4.63% | +29.86% |
| 1-year return | -1.12% | -21.02% |
| 5-year return | +33.65% | -15.19% |
| P/E ratio (TTM) | 15.11 | — |
| Forward P/E | 8.03 | — |
| EPS (TTM) | $1.69 | $-1.64 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $29.52 | $35.34 |
| 52-week low | $16.65 | $12.12 |
| Distance from 52-week high | -13.48% | -49.29% |
| Average volume | 467.34K | 839.02K |
| Shares outstanding | 42.54M | 61.14M |
| 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
- AMPH has outperformed JANX by 19.9 percentage points over the past year.
AMPH vs JANX FAQ
Which is bigger, Amphastar Pharmaceuticals or Janux Therapeutics?
Janux Therapeutics (JANX) is larger, with a market capitalization of $1.10B compared with $1.09B for Amphastar Pharmaceuticals (AMPH).
Which stock has performed better over the past year, AMPH or JANX?
AMPH returned -1.12% over the past 12 months, compared with -21.02% for JANX (price return, excluding dividends). Past performance does not predict future results.
Are Amphastar Pharmaceuticals and Janux Therapeutics in the same industry?
Yes. Both are classified in the Biotechnology: Pharmaceutical Preparations industry within the Health Care sector.