Energy Recovery (ERII) vs SES AI (SES)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 9, 2026.
Summary
Energy Recovery (ERII) has outperformed SES AI (SES) over the past year, losing 55.7% versus a loss of 71.7%. Over five years, ERII leads with a -65.7% price change compared with -92.1% for SES. Energy Recovery is the larger company by market cap ($348.9 million vs $279.9 million), about 1.2 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 | SES |
|---|---|---|
| Share price | $6.84 | $0.7539 |
| Market cap | $348.89M | $279.91M |
| 1-day change | -0.07% | -3.63% |
| YTD return | -49.30% | -56.54% |
| 1-year return | -55.70% | -71.66% |
| 5-year return | -65.70% | -92.13% |
| P/E ratio (TTM) | 26.29 | — |
| Forward P/E | 20.40 | — |
| EPS (TTM) | $0.26 | $-0.20 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $18.32 | $3.73 |
| 52-week low | $6.60 | $0.491 |
| Distance from 52-week high | -62.69% | -79.79% |
| Analyst consensus | none | none |
| Avg. price target upside | +17.04% | +238.24% |
| Average volume | 945.48K | 19.45M |
| Shares outstanding | 51.04M | 327.41M |
| Employees | 230 | 215 |
| Sector | Technology | Miscellaneous |
| 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
- ERII has outperformed SES by 16.0 percentage points over the past year.
- The two companies sit in different sectors: Energy Recovery in Technology and SES AI in Miscellaneous.
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.
Technology · Industrial Machinery/Components · 230 employees
About SES AI
SES stock →SES AI Corporation develops and produces AI enhanced lithium metal and lithium-ion rechargeable battery technologies for electric vehicles, urban air mobility, drones, robotics, battery energy storage systems, and other applications. It manufactures and sells residential and commercial ESS systems, li-ion, li metal battery cells and battery materials, such as electrolytes for automotive original equipment manufacturers and others.
Miscellaneous · Industrial Machinery/Components · 215 employees
ERII vs SES FAQ
Which is bigger, Energy Recovery or SES AI?
Energy Recovery (ERII) is larger, with a market capitalization of $348.89M compared with $279.91M for SES AI (SES).
Which stock has performed better over the past year, ERII or SES?
ERII returned -55.70% over the past 12 months, compared with -71.66% for SES (price return, excluding dividends). Past performance does not predict future results.
Are Energy Recovery and SES AI in the same industry?
Yes. Both are classified in the Industrial Machinery/Components industry within the Technology sector.