Please see below for a list of companies represented at the Awards in 2009:

3HG
Accenture
Action for Blind People / RNIB
Advantis Credit
AES
Agbar Aserco
AGBAR Environment
AMT-Sybex
Anglian Water 
Anglian Water Services
Association of Electricity Producers
Balfour Beatty Utility Solutions
Baringa Partners
Barking Power
Barnsnape Consulting
BG Group
Bishops Wood
British Gas
British Gas Business
British Telecom
BT Fleet
BTCV
Business Stream
BWBSI
Cambridge University
Capgemini
Capita
CB Richard Ellis
Central Networks
Centrica
Citimark
Clancy Docwra
ClickSoftware
CNG
Cognizant Technology Solutions
Consumer Council for Water
Consumer Focus
Contigo
Corona Energy
Costain
Cronos
Davconenergy
DECC
Deloitte
Department for Transport
Develop
DFT
DHL
Drax Power
DST
E.ON Business Services
E.ON Engineering Academy
E.ON UK
Ebico
EC Harris
Echo Managed Services
Ecotricity
EDF Energy Networks
ElectraLink
Electricity Northwest
Elexon
EMC Consulting
ENA
Energy & Utility Skills
Energy Intensive Users Group
Energy Networks Association
Energy Retail Association
Energy Savings Trust
Energy UK
Engage Consulting
England Women's Cricket Team
Eniuk
Enterprise
Enzen Global
ERM
Ernst & Young
ES Pipelines
Europa
Everywoman
Face2Face Contact
Faithful and Gould
First:Utility
Fredrickson International
Fuel Poverty Action Group
Fulcrum
G4S Utility Services
Gazprom Marketing & Trading
GDF SUEZ Energy UK
Gemserv
Geodesys/Anglian Water
Good Energy
Groundwork
GSF UK
H2o
Haven Power
HCL
HP
I.C.S.
IA+
IBM UK
ICE
ICIS Heren
IDS Scheer UK
International Power
Invensys - IMServ
Joint Authorities Group UK
KPMG
Lancashire Wildlife Trust
Lane Clark & Peacock
Leadent Edge
Lexis PR
Libertas Partners
Lodestar
Logica
London First
Lowri Beck
Mace Group
Macquarie
Mapeley
Microsoft
Mitsubishi Electric Europe
Morrison Utility Services
Mouchel
MWH UK
Nacap UK
National Grid
National Grid Metering
National Joint Utilities Group
Nelson Bakewell
New Grange Developments
North London Gas Alliance
Northamptonshire County Council
Northern Gas Networks
Northern Ireland Water
Northumbrian Water
npower
NUAG
OFWAT
Ofwat
OnStream
Opale
Opus
Ordnance Survey
OSSISS
Picture Partnership
Power2Contact
Poyry
Progressive Media
Rainmaking
Regus
Renewable Energy Association
resolvecall
Revenue Assurance
RNID
Roxburghe (UK)
RR Donnelley
RWE IT
RWE npower
SAP
SAS
SBGI
SBWWI
Scotia Gas Networks
Scottish & Southern Energy
Scottish and Southern Energy (ONZO)
Scottish Power 
Scottish Power Energy Retail
Scottish Water
SE Water
SECOR
Severn Trent Water
SGP
Shell
Shell Gas Direct
Siemens Metering Services
Skanska
Smartest Energy
Solomon Business Solutions
Solution Brokers
South East Water
South Staffordshire
South Staffs Water
Southern Water Services
SSE
Statoil
Sutton and East Surrey Water
TATA Consultancy Services
TDX Group
Teccura
Teesside Power
Telefonica Europe/O2
TFL
Thames Water 
The D Group
The Ombudsman Service
Total Gas & Power
Total Global Steel
Transport for London
Trimble MRM
T-Systems
United Utilities Group
uSwitch.com
Utilisoft
Utility First
Utility Week
Veolia Environmental Services
Veolia Water 
Vertex
Virgin Media
Wales & West Utilities
Water Industry Commission for Scotland
Water UK
WaterAid
Wessex Water
Wheatley Associates
Wipro Technologies
Worcester Energy Services
Xoserve
Yorkshire Water Services
Zensar Technologies