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
$31.432 B
0.03% of all US-listed value
Companies
5
Ranked #123 of 152 industries
Average
$6.286 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | Madison Air SolutionsMAIR | $15.6B | $31.09 | -0.54% | United States |
| 2 | DonaldsonDCI | $11.4B | $98.61 | +0.28% | United States |
| 3 | Ceco EnvironmentalCECO | $4.14B | $70.92 | +3.37% | United States |
| 4 | Perma-Pipe InternationalPPIH | $214.9M | $26.45 | +1.77% | United States |
| 5 | Fuel TechFTEK | $43.7M | $1.40 | +2.19% | United States |
All 5 companies. One row per company — secondary share classes are folded into their primary listing. Updated 9 Aug 2026.
Sectors pollution control equipment companies sit in
Other industries
Semiconductors 100Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 232Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 501Major Banks 245Industrial Machinery/Components 209Catalog/Specialty Distribution 30Business Services 93Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 18Investment Bankers/Brokers/Service 68Real Estate Investment Trusts 179Department/Specialty Retail Stores 14Oil & Gas Production 116Telecommunications Equipment 82Beverages (Production/Distribution) 35Electronic Components 21Finance: Consumer Services 163Electric Utilities: Central 59Consumer Electronics/Appliances 23Natural Gas Distribution 29Medical Specialities 44All industries →
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered — see methodology.