| Rank | Company, City of Head Office (Country) | |
| |
| 1 | Siemens AG in München (D) | |
| 2 | National Grid Transco PLC in London (UK) | |
| 3 | Philips GmbH in Hamburg (D) | |
| 4 | Compañia Española de Petroleos SA in Badajoz (E) | |
| 5 |  Alstom in Paris (F) | |
| 6 | Energie Baden-Württemberg AG in Karlsruhe (D) | |
| 7 | Vattenfall Europe AG in Hamburg (D) | |
| 8 | Iberdrola, S.A. in Madrid (E) | |
| 10 |  Pirelli & C. SpA in Milano (I) | |
|
|
| 11 | Balfour Beatty plc in London (UK) | |
| 12 | Gas Natural Andalucia SA in Barcelona (E) | |
| 13 | Groupe SNEF SA in Marseille (F) | |
| 14 | Bicc Plc in London (UK) | |
| 15 | Transco PLC in Solihull (UK) | |
| 19 |  Cogema in Vélizy-Villacoublay (F) | |
| 21 | RWE NET Aktiengesellschaft in Dortmund (D) | |
| 23 | Motorola GmbH in Wiesbaden (D) | |
| 24 |  RWE Solutions AG in Neu-Isenburg (D) | |
| 25 | Tempus Computers Ltd in Birmingham (UK) | |
| 27 | NTL Ltd in Watford (UK) | |
| 30 |  Legrand SA in Limoges (F) | |
| 31 | Neckarwerke Stuttgart Aktiengesellschaft in Altbach (D) | |
| 33 |  Turk Elektrik Endustrisi A.S. in Istanbul (TR) | |
| 35 |  SEB S.A. in Ecully (F) | |
| 36 |  Fournie Grospaud in Mérignac (F) | |
| 37 |  Miele & Cie GmbH & Co. in Gütersloh (D) | |
| 38 | Fortum AB in Sunne (S) | |
| 39 |  Ericsson Telecomunicazioni in Roma (I) | |
| 40 | Eastern Electricity Plc in Ipswich (UK) | |
| 41 | E. ON Kraftwerke GmbH in Gelsenkirchen (D) | |
| 44 | MVV Energie AG in Mannheim (D) | |
| 45 |  Computacenter Ltd in Birmingham (UK) | |
| 46 |  Draka Deutschland GmbH & Co. KG in Wuppertal (D) | |
| 49 |  London Energy (formerly London Electricity Plc) in London (UK) | |
| 51 | Gamesa Energía in Miñano Menor (E) | |
| 52 |  Hella KG Hueck & Co in Lippstadt (D) | |
| 54 |  Forclum in Le Blanc-Mesnil (F) | |
| 55 |  Electrolux Zanussi SpA in Porcia (I) | |
| 56 | Viridian Group Plc in Belfast (UK) | |
| 58 | E. DIS Aktiengesellschaft in Fürstenwalde/Spree (D) | |
| 59 | Alstom Power S.A in Madrid (E) | |
| 60 |  Epcos AG in München (D) | |
| 62 | Zumtobel AG in Dornbirn (A) | |
| 64 | Sony España SA in Barcelona (E) | |
| 65 | Samsung Electronics (UK) Ltd in Billingham (UK) | |
| 66 | Central Networks PLC in Castle Donington (UK) | |
| 67 | IBC Vehicles Ltd in Luton (UK) | |
| 68 |  Leopold Kostal GmbH & Co KG in Lüdenscheid (D) | |
| 70 | Spie Trindel in Saint-Apollinaire (F) | |
| 71 | Möller GebäudeAutomation KG in Schrems (A) | |
| 76 | Alstom T&D SA in Massy (F) | |
| 78 | TT electronics plc in Weybridge (UK) | |
| 80 | Germanos S.A in Agios Stefanos (GR) | |
| 82 | Minolta Europe GmbH in Langenhagen (D) | |
| 83 | Hyundai Electronics UK Ltd. in Weybridge (UK) | |
| 85 | Atlantic Copper SA in Huelva (E) | |
| 88 | Isnard (Anciens ETS Maxence) SA in Fontaine (F) | |
| 90 | Lincas Elektro Vertriebs - Gesellschaft mbH in Hamburg (D) | |
| 91 | Alcatel Division Fibres Optiques in Conflans-Sainte-Honorine (F) | |
| 92 |  A/S Nordisk Solar Compagni in Kolding (DK) | |
| 93 | Surahammars Bruks AB in Surahammar (S) | |
| 94 | Dortmunder Energie- und Wasserversorgungs Gesellschaft mit Beschränkter Haftung in Dortmund (D) | |
| 95 | Strix Ltd in Castletown (UK) | |
| 96 | Sembcorp Utilities Teesside Ltd in Middlesbrough (UK) | |
| 97 | Seeboard Group PLC in Crawley (UK) | |
| 98 | Lightning Electrical Construction Ltd in Southampton (UK) | |
| 100 | Ericsson Cables AB in Sundbyberg (S) | |
| | |
| | | Minimum annual sales necessary to enter this table: 748 Million Euro |
| |
