Largest pollution control equipment companies
Every US-listed pollution control equipment company we cover, 5 of them, ranked by market capitalisation, with revenue and earnings taken from their SEC filings.
Combined market cap
$26.327 B
0.03% of all US-listed value
Companies
5
Ranked #126 of 152 industries
Average
$5.265 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | Madison Air SolutionsMAIR | $11.9B | $23.72 | +1.02% | United States |
| 2 | DonaldsonDCI | $9.97B | $86.05 | -0.32% | United States |
| 3 | Ceco EnvironmentalCECO | $4.15B | $70.83 | +2.03% | United States |
| 4 | Perma-Pipe InternationalPPIH | $247.6M | $30.21 | -0.23% | United States |
| 5 | Fuel TechFTEK | $55.6M | $1.78 | +1.71% | United States |
All 5 companies. One row per company, with secondary share classes folded into their primary listing. Updated 18 Sept 2026.
Sectors pollution control equipment companies sit in
Other industries
Semiconductors 101Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 233Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 498Major Banks 245Industrial Machinery/Components 210Catalog/Specialty Distribution 31Business Services 93Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 18Investment Bankers/Brokers/Service 68Oil & Gas Production 116Real Estate Investment Trusts 177Department/Specialty Retail Stores 14Telecommunications Equipment 82Beverages (Production/Distribution) 36Electronic Components 21Electric Utilities: Central 60Finance: Consumer Services 162Natural Gas Distribution 29Consumer Electronics/Appliances 22Biotechnology: Biological Products (No Diagnostic Substances) 159All industries →
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered: see methodology.