| ACORTEC | Saudi Arabia |
| AEB | Netherlands |
| Akzo Delamine | Netherlands |
| Aperam | Belgium |
| AT&S | Austria |
| AVG | Germany |
| Befesa | Germany |
| Currenta | Germany |
| ENBW | Germany |
| HAW | Germany |
| Hyundai Steel | Korea |
| Ineos | Germany |
| Inseco | Germany |
| Infraserv | Germany |
| Kaldewei | Germany |
| Kelheim Fibres | Germany |
| Kronos | Germany |
| Lanxess | Germany |
| Lauing | Germany |
| Lenzing AG | Austria |
| Maco | Austria |
| Mahnke | Germany |
| Momentive | Germany |
| Müllverbrennungsanlage AVG | Germany |
| Nordenhamer Zinkhütte | Germany |
| Nyrstar | Belgium |
| Nyrstar | Netherlands |
| REMA TIP TOPAntikorozia | Poland |
| RWE | Netherlands |
| RZR | Germany |
| STEAG | Germany |
| Thyssen Krupp | Germany |
| Trepax | Thailand |
| Uniper | Germany |
| Vattenfall | Germany |
| Veltins | Germany |
| Venator | Germany |
| Voest | Austria |
| Volkswagen | Germany |
| Wacker | Germany |
| ZAS Burgkirchen | Germany |
