AirJoule Technologies (AIRJ) vs Quantum-Si (QSI)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 9, 2026.
Summary
Quantum-Si (QSI) has outperformed AirJoule Technologies (AIRJ) over the past year, losing 12.1% versus a loss of 31.2%. Quantum-Si is the larger company by market cap ($334.9 million vs $264.8 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 | AIRJ | QSI |
|---|---|---|
| Share price | $3.61 | $1.53 |
| Market cap | $264.78M | $334.89M |
| 1-day change | -2.17% | +25.41% |
| YTD return | -8.38% | +39.09% |
| 1-year return | -31.24% | -12.07% |
| 5-year return | — | -85.81% |
| EPS (TTM) | $-1.30 | $-0.45 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $6.75 | $3.10 |
| 52-week low | $2.22 | $0.69 |
| Distance from 52-week high | -46.52% | -50.65% |
| Analyst consensus | strong_buy | buy |
| Avg. price target upside | +157.34% | +49.02% |
| Average volume | 1.35M | 4.17M |
| Shares outstanding | 73.35M | 198.95M |
| Employees | 16 | 145 |
| Sector | Industrials | Industrials |
| Industry | Industrial Machinery/Components | Industrial Machinery/Components |
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
- QSI has outperformed AIRJ by 19.2 percentage points over the past year.
About AirJoule Technologies
AIRJ stock →AirJoule Technologies Corporation operates as an atmospheric renewable energy and water harvesting technology company. It provides energy and dehumidification, water harvesting systems, water recapture systems, evaporative heat pump systems, water heating systems, low relative humidity drying systems, pre- and mid-cool integration coils, evaporative cooling, advanced vacuum pump systems, isothermal condenser design, gate and seal systems, and atmospheric water generation through its AirJoule technology.
Industrials · Industrial Machinery/Components · 16 employees
About Quantum-Si
QSI stock →Quantum-Si incorporated, a life sciences company, develops proprietary, universal, and single-molecule detection platform applied to proteomics to enable next-gen protein sequencing (NGPS). The company offers Platinum and Platinum Pro NGPS instruments for single-molecule, amino acid level resolution, and automated data analysis; library preparation kits to prepare a customer's protein sample for sequencing; and sequencing kits, which contain the reagents and consumables used to perform NGPS.
Industrials · Industrial Machinery/Components · 145 employees
AIRJ vs QSI FAQ
Which is bigger, AirJoule Technologies or Quantum-Si?
Quantum-Si (QSI) is larger, with a market capitalization of $334.89M compared with $264.78M for AirJoule Technologies (AIRJ).
Which stock has performed better over the past year, AIRJ or QSI?
QSI returned -12.07% over the past 12 months, compared with -31.24% for AIRJ (price return, excluding dividends). Past performance does not predict future results.
Are AirJoule Technologies and Quantum-Si in the same industry?
Yes. Both are classified in the Industrial Machinery/Components industry within the Industrials sector.