Energy Recovery (ERII) vs Quantum-Si (QSI)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 10, 2026.
Summary
Quantum-Si (QSI) has outperformed Energy Recovery (ERII) over the past year, losing 12.1% versus a loss of 55.4%. Over five years, ERII leads with a -65.7% price change compared with -82.2% for QSI. Energy Recovery is the larger company by market cap ($349.1 million vs $334.9 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 | ERII | QSI |
|---|---|---|
| Share price | $6.84 | $1.53 |
| Market cap | $349.15M | $334.89M |
| 1-day change | 0.00% | +25.41% |
| YTD return | -49.30% | +39.09% |
| 1-year return | -55.35% | -12.07% |
| 5-year return | -65.70% | -82.21% |
| P/E ratio (TTM) | 26.31 | — |
| Forward P/E | 20.42 | — |
| EPS (TTM) | $0.26 | $-0.56 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $18.32 | $3.10 |
| 52-week low | $6.60 | $0.69 |
| Distance from 52-week high | -62.66% | -50.65% |
| Analyst consensus | none | buy |
| Avg. price target upside | +16.96% | +49.02% |
| Average volume | 945.48K | 4.17M |
| Shares outstanding | 51.04M | 198.95M |
| Employees | 230 | 145 |
| Sector | Industrials | Industrials |
| Industry | Pollution & Treatment Controls | 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 ERII by 43.3 percentage points over the past year.
About Energy Recovery
ERII stock →Energy Recovery, Inc., together with its subsidiaries, designs, manufactures, and sells energy efficiency technology solutions in the United States, North, South and Latin America, the Middle East, Northern Africa, Asia, and Europe. It operates through Water and Emerging Technologies segments.
Industrials · Pollution & Treatment Controls · 230 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
ERII vs QSI FAQ
Which is bigger, Energy Recovery or Quantum-Si?
Energy Recovery (ERII) is larger, with a market capitalization of $349.15M compared with $334.89M for Quantum-Si (QSI).
Which stock has performed better over the past year, ERII or QSI?
QSI returned -12.07% over the past 12 months, compared with -55.35% for ERII (price return, excluding dividends). Past performance does not predict future results.
Are Energy Recovery and Quantum-Si in the same industry?
Both are in the Industrials sector, but in different industries: Pollution & Treatment Controls for Energy Recovery and Industrial Machinery/Components for Quantum-Si.