In total 2836 participants from 72 countries attended Metering, Billing/CRM Europe 2009 in Barcelona.

Including representatives from the following major utilities:

A2A S.p.A., Agder Energi Nett AS, Aguas de Santarem, Alliander, ASM Brecia, Arbon Energie, BKK, Bord Gais Energy, British Gas, CenterPoint, CEZ, Continuon, Delta, DEMASZ Halozati Eloszto Kft., DONG Energy, Duke Energy, E.ON Group, Eandis, EDF , EDF Energy, EDP Distribução, Eesti Energia, Eidsiva Energi AS, Electrabel,  ElectraLink, Electricity Supply Board, Elektro Ljubljana d.d., Elektroinštitut Milan Vidmar, Elektrovojvodina, Elia, EMH Elektrizitätszähler GmbH, EMS Serbia, EnBW, Endesa Distribución Eléctrica, Endesa Red, Eneco, ENEL, Energa Operator , Energy Australia, Enexis, ERDF, ESB, Essent, EVN AG, Fingrid Oyj, Fortum, Gas Natural, Gaz de France, GDF Suez, Göteborg Energi, Iberdrola, Intergas Energie, Liander, Mälarenergi, Elnät AB, MVV Energie AG, National Grid, NVE, PG&E, POWEO, PWN, Rarik, Rendo Energy Company, RWE Rhein-Ruhr Netzservice, San Diego Gas & Electric, Scottish & Southern Energy, SEAS-NVE, SP PowerGrid, Stattkraft, Telge Energi, Taiwan Power Company, Tokyo Electric Power Company, Toronto Hydro, Umea Energi, United Energy Distribution, Vattenfall Nordic Distribution Networks, Veolia Eau, Vitens, Wienstrom, Yello Strom