Atossa Therapeutics (ATOS) vs Quantum Biopharma (QNTM)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 9, 2026.
Summary
Quantum Biopharma (QNTM) has outperformed Atossa Therapeutics (ATOS) over the past year, losing 80.3% versus a loss of 85.5%. Over five years, ATOS leads with a -94.4% price change compared with -96.7% for QNTM. Atossa Therapeutics is the larger company by market cap ($25.6 million vs $19.3 million), about 1.3 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 | ATOS | QNTM |
|---|---|---|
| Share price | $2.57 | $3.00 |
| Market cap | $25.65M | $19.29M |
| 1-day change | +6.28% | -3.54% |
| YTD return | -72.66% | -57.40% |
| 1-year return | -85.47% | -80.28% |
| 5-year return | -94.36% | -96.65% |
| EPS (TTM) | $-4.45 | $-4.98 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $18.00 | $16.36 |
| 52-week low | $1.70 | $2.07 |
| Distance from 52-week high | -85.72% | -81.66% |
| Analyst consensus | strong_buy | none |
| Avg. price target upside | +639.30% | +309.00% |
| Average volume | 63.48K | 205.30K |
| Shares outstanding | 9.98M | 6.43M |
| Employees | 16 | — |
| 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.
About Atossa Therapeutics
ATOS stock →Atossa Therapeutics, Inc., a clinical-stage biopharmaceutical company, develops medicines in areas of significant unmet medical need in oncology in the United States. Its lead drug candidate is oral (Z)-endoxifen, a selective estrogen receptor modulator and selective estrogen receptor degrader currently in Phase 2 clinical development for the treatment and reduction of risk of breast cancer, as well as in other therapeutic areas.
Health Care · Biotechnology: Pharmaceutical Preparations · 16 employees
About Quantum Biopharma
QNTM stock →Quantum BioPharma Ltd., together with its subsidiaries, operates as a biopharmaceutical company. The company operates through two segments, Biopharmaceutical Innovation and Strategic Investments.
Health Care · Biotechnology: Pharmaceutical Preparations
ATOS vs QNTM FAQ
Which is bigger, Atossa Therapeutics or Quantum Biopharma?
Atossa Therapeutics (ATOS) is larger, with a market capitalization of $25.65M compared with $19.29M for Quantum Biopharma (QNTM).
Which stock has performed better over the past year, ATOS or QNTM?
QNTM returned -80.28% over the past 12 months, compared with -85.47% for ATOS (price return, excluding dividends). Past performance does not predict future results.
Are Atossa Therapeutics and Quantum Biopharma in the same industry?
Yes. Both are classified in the Biotechnology: Pharmaceutical Preparations industry within the Health Care sector.