Ci-dessous il ya les entreprises abonné à l'édition 2010
| Ampere | Italy |
| Ansaldo Energia | Italy |
| Apar Industries Limited | India |
| Api Energia | Italy |
| Arkema | France |
| BIH Technology | Canada |
| Bureau Veritas | France |
| C.V.A. | Italy |
| CG Holdings Belgium NV | Belgium |
| Climatelec | France |
| Cofely | Italy |
| Colbun | Chile |
| Compagnie Ivorienne d'Electricitè | Ivory Coast |
| Dalkia France | France |
| DGM Business development | India |
| EDF | France |
| EDF R&D | France |
| EDF-CIH | France |
| Edipower | Italy |
| Edison | Italy |
| Elma Servizi industriali | Italy |
| Enel Produzione | Italy |
| Energotech | Romania |
| ERDF | France |
| Ergon Europe Mea | Belgium |
| Estabanell y Pahisa Energia | Spain |
| Fenice | Italy |
| Gelsia Reti srl | Italy |
| Getra distribution srl | Italy |
| Getra service | Italy |
| GMT | France |
| Hydro-Québec | Canada |
| IREN Energia | Italy |
| Italiana coke | Italy |
| K-Energy | Philippines |
| L&Z | Germany |
| L.M.P. | Italy |
| Laborelec | Belgium |
| Mazzucchelli 1849 spa | Italy |
| Multitest09 | Spain |
| National Grid | UK |
| NGCP | Philippines |
| Petronas Lubricants | Italy |
| Politecnico di Torino | Italy |
| REN-Rede Electrica Nacional | Portugal |
| Retranol | Switzerland |
| RSE | Italy |
| SC Smart sa | Romania |
| SECI Energia spa | Italy |
| Sibelec | Maroc |
| Siemens TD | France |
| Siemens Transformers | Italy |
| SN Nuclearelectrica Sucursala Cernavoda | Romania |
| SPE | Belgium |
| Systeme | Chile |
| TES Transformer Electro Service | Italy |
| Tirreno Power | Italy |
| Total | France |
| Trafotech | Portugal |
| Transfo Services | France |
| Union Fenosa Distribucion | Spain |
| VERBUND Hydro Power AG | Austria |
| Vicat | France |
| Weidmann ET AG | Switzerland |
