ClearSign Technologies (CLIR) vs Fuel Tech (FTEK)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 9, 2026.
Summary
Fuel Tech (FTEK) has outperformed ClearSign Technologies (CLIR) over the past year, losing 46.3% versus a loss of 68.3%. Over five years, FTEK leads with a -3.8% price change compared with -83.4% for CLIR. Fuel Tech is the larger company by market cap ($51.7 million vs $21.2 million), about 2.4 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 | CLIR | FTEK |
|---|---|---|
| Share price | $3.11 | $1.66 |
| Market cap | $21.17M | $51.66M |
| 1-day change | -5.76% | -0.90% |
| YTD return | -44.46% | +6.09% |
| 1-year return | -68.27% | -46.27% |
| 5-year return | -83.37% | -3.78% |
| EPS (TTM) | $-1.00 | $-0.11 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $10.20 | $3.45 |
| 52-week low | $3.11 | $1.17 |
| Distance from 52-week high | -69.51% | -52.03% |
| Analyst consensus | none | none |
| Avg. price target upside | +543.09% | +141.69% |
| Average volume | 16.99K | 157.62K |
| Shares outstanding | 6.81M | 31.22M |
| Employees | 16 | 77 |
| Sector | Industrials | Industrials |
| Industry | Industrial Machinery/Components | Pollution Control Equipment |
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
- Fuel Tech is about 2.4 times larger than ClearSign Technologies by market value ($51.66M vs $21.17M).
- FTEK has outperformed CLIR by 22.0 percentage points over the past year.
About ClearSign Technologies
CLIR stock →ClearSign Technologies Corporation designs and develops products and technologies for the purpose of decarbonization and improving key performance characteristics of industrial and commercial systems in the United States and the People's Republic of China. The company's technologies include ClearSign core burner technology consists of an industrial burner body and a downstream porous ceramic or metal flame stabilizing structure; ClearSign core process burner technology that provides a direct burner replacement for traditional refinery process heaters; ClearSign core boiler burner technology; ClearSign core flaring burners that can be used to provide a flare product with extremely low nitrogen oxide emissions; and ClearSign eye flame sensor, an electrical flame sensor for industrial applications.
Industrials · Industrial Machinery/Components · 16 employees
About Fuel Tech
FTEK stock →Fuel Tech, Inc. engages in the development, commercialization, and application of technologies for air pollution control, process optimization, water treatment, and advanced engineering services to utility and industrial customers in the United States, rest of the Americas, Europe, South Africa, the Pacific Rim, and internationally.
Industrials · Pollution Control Equipment · 77 employees
CLIR vs FTEK FAQ
Which is bigger, ClearSign Technologies or Fuel Tech?
Fuel Tech (FTEK) is larger, with a market capitalization of $51.66M compared with $21.17M for ClearSign Technologies (CLIR).
Which stock has performed better over the past year, CLIR or FTEK?
FTEK returned -46.27% over the past 12 months, compared with -68.27% for CLIR (price return, excluding dividends). Past performance does not predict future results.
Are ClearSign Technologies and Fuel Tech in the same industry?
Both are in the Industrials sector, but in different industries: Industrial Machinery/Components for ClearSign Technologies and Pollution Control Equipment for Fuel Tech.