| ARN Nijmegen |
| BAUMGARTE |
| Beaudrey&Cie |
| CEGELEC |
| FLSmidth |
| Hayward Tyler |
| K+S |
| Köhler |
| Nordzucker |
| Pauls SA |
| REMONDIS |
| Solvay |
| STANDARD KESSEL |
| Südzucker |
| Trockenstabilat |
| WSWE |
| Wurth |
|
| |
| ABD Wind |
| BSR |
| DONG Energy |
| E ON |
| EVONIK |
| GETEC |
| MAINOVA |
| Mark E |
| Pfalzwerke |
| RAB |
| RWE |
| STEAG |
| STW Hannover |
| SWB |
| Vattenfall |
| ZVO |
|
| |
| ALLIANZ / AZT |
| AXA |
| HDI |
| Pöyry Energy |
| Steinmüller Engineering |
| TÜV Süd |
| W M T |
| W&G |
|