Name
 | URL | Country
| Market Cap (US$)
|
|---|
| AMETEK, Inc. | http://www.ametek.com | United States | 3,984 |
| Donaldson Company, Inc. | http://www.donaldson.com | United States | 2,913 |
| Fuel-Tech, Inc. | http://www.fuel-tech.com/ | United States | 414 |
| Sunonwealth Electric Machine Industry | http://www.sunon.com | Taiwan | 158 |
| Camco International Limited | http://www.camco-international.com/ | United Kingdom | 152 |
| Flanders Corporation | http://www.flanderscorp.com | United States | 151 |
| KC Cottrell Co., Ltd | http://www.koreacottrell.co.kr | South Korea | 137 |
| Nederman Holding Ab | http://www.nederman.se | Sweden | 121 |
| Zhejiang Shangfeng Industrial Holdings Co Ltd | http://www.shangfeng.net | China | 95 |
| MFRI, Inc. | http://www.mfri.com | United States | 75 |
| CECO Environmental Corporation | http://www.cecoenviro.com/ | United States | 59 |
| ADA-ES Inc | http://www.adaes.com | United States | 47 |
| Ecopro Co., Ltd | http://www.ecopro.co.kr | South Korea | 43 |
| Adda Corp. | http://www.adda.com.tw | Taiwan | 31 |
| Alanco Technologies, Inc. | http://www.alanco.com | United States | 29 |
| Royal Electric Co., Ltd. | NA | Japan | 28 |
| China Shen Zhou Mining & Resources Inc | http://www.chinaszmg.com/ | China | 20 |
| Clean TeQ Holdings Limited | http://www.cleanteq.com | Australia | 18 |
| TurboSonic Technologies | http://www.turbosonic.com/ | Canada | 11 |
| Global Standard Technology Co., Ltd. | http://www.gst-in.com | South Korea | 8 |
|
