| Symbol | Name | Country | Exchange |
|---|---|---|---|
| ADES | Advanced Emissions Solutions, Inc. | US | NASDAQ |
| ECT | ENVIRONMENTAL CLEAN TECHNOLOGIES LIMITED. | AU | ASX |
| 600397 | Anyuan Coal Industry Group Co Ltd | CN | SHG |
| 600971 | Anhui Hengyuan Coal Industry and Electricity Power Co Ltd | CN | SHG |
| 601666 | Pingdingshan Tianan Coal Mining Co Ltd | CN | SHG |