Pollution Control Equipment Stocks
5 pollution control equipment stocks ranked by market capitalization. Updated October 9, 2026.
MetaCap tracks 5 US-listed companies in the Pollution Control Equipment industry, part of the broader Industrials sector, worth a combined $26.38B. The largest pollution control equipment stocks are Madison Air Solutions (MAIR, $12.2B), Donaldson (DCI, $10.1B) and CECO Environmental (CECO, $3.9B). The biggest company alone accounts for about 46% of the industry's total market value, and the median member is worth $3.9B. On the latest trading day, 3 of 5 pollution control equipment stocks shown were higher, with an average move of +0.25%; Madison Air Solutions (MAIR) led with a 0.92% gain.
Summary generated from market data by MetaCap's automated system. Methodology
Largest pollution control equipment stocks by market cap
| # | Symbol | Company | Price | % Change | Volume | Market Cap |
|---|---|---|---|---|---|---|
| 1 | MAIR | Madison Air Solutions Corporation Class A | 24.22 | +0.92% | 1.16M | $12.15B |
| 2 | DCI | Donaldson Company Inc. | 86.93 | -0.26% | 492.62K | $10.07B |
| 3 | CECO | CECO Environmental Corp. | 65.82 | +0.41% | 857.38K | $3.86B |
| 4 | PPIH | Perma-Pipe International Holdings Inc. | 31.32 | +0.48% | 32.31K | $256.67M |
| 5 | FTEK | Fuel Tech Inc. | 1.65 | -0.30% | 114.74K | $51.51M |
Frequently asked questions
- How many pollution control equipment stocks are there?
- MetaCap tracks 5 US-listed stocks in the Pollution Control Equipment industry, with a combined market value of about $26.38B.
- What is the largest pollution control equipment company?
- Madison Air Solutions (MAIR) is the largest pollution control equipment stock by market capitalization, at about $12.15B.
- What sector is the pollution control equipment industry in?
- The Pollution Control Equipment industry belongs to the Industrials sector. Sectors are broad groupings of related industries; industries group companies with very similar products or business models.
- How are pollution control equipment stocks doing today?
- As of October 9, 2026, the Pollution Control Equipment industry is up 0.39% on a market-cap-weighted basis.
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Prices as of Oct 9, 7:43 PM EDT. Market data is delayed at least 15 minutes and provided for informational purposes only. Not investment advice. Full disclaimer