Gas and Electricity Utilities

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- TXU Energi
- Gas South
- Strategic Energy
- Tampa Electric
- Georgia Natural Gas
- Gasearch
- Twin County Energy
- Gaz de France UK
- Sun Prairie Water & Light
- Sturgeon Bay Utilities
- Steuben Gas Storage Company
- Green Mountain Power Corporation
- South of Scotland Power Group
- Gas Call Services Repair and Maint...
- San Diego Gas and Electric
- TRUenergy
- Npower
- NSTAR
- Piedmont Natural Gas, Inc.
- Gas Malaysia SDN BHD
- Texas Electricity
- Alpina-Trade GmbH
- United Illuminating Company
- United Energy Ltd
- UKenergy
- UK Gas & Electricity Options
- Aspen Energy Corporation, Columbus, OH
- UK Business Power
- UIL Holdings Corporation
- UGI Corporation
- The Third Taxing District Electric...
- Toronto Hydro
- Arizona Public Service
- TXU Energy
- U.S. Gas & Electric, Inc.
- Freedom Energy Partners
- KeySpan Energy
- ESB Independent Energy
- HHS Homer Heating Services Ltd
- First Energy Solutions
- Great Plains Energy
- Grand Island Nebraska Electric Pow...
- Gexa Energy
- Georgia Natural Gas,
- Gas Assessments.com
- KEM Electric Cooperative, Inc.
- Public Service Enterprise Group
- Kitchener-Wilmot Hydro Inc.
- Unitil Corporation
- Southern Energy Homes, Inc.
- Southern Company
- SEEBOARD Energy
- Progress Energy
- Portland General Electric
- Platte River Power Authority
- PFK Associates, Inc.
- Peoples Energy
- OGE Energy Corp.

(part 2)
- Northern Ireland Electricity
- New Jersey Resources Corp.
- New Jersey Natural Gas Company
- New Holstein Utilities
- National Grid
- Michigan Gas Utilities
- Maine Public Service Co.
- Williams Companies, Inc.
- ENMAX Power
- CEG Energy Options Inc.
- Consolidated Edison
- Central Maine Power Company
- Atmos Energy
- Edison International
- EconomyPower
- E.ON UK
- Black River Electric Cooperative
- Avista Corp.
- Energyshop.com
- Duquesne Light Holdings
- CoServ
- Dynegy
- Blue Ridge Electric Cooperative
- Black Hills Corporation
- Berkshire Gas Co.
- CenterPoint Energy, Inc.
- Centre for Energy
- Cedarburg Light and Water Utility
- Southeastern Electric Cooperative,...
- Southeast Alabama Gas District
- Richmond Power and Light
- South Jersey Gas
- River Falls Municipal Utilities
- Sabah Electricity Sdn. Bhd.
- Shell Energy
- Reliant Energy Retail Services
- Reliance Energy - A Dhirubhai Amba...
- City of Hugoton Kansas
- Oklahoma Natural Gas
- Otter Tail Power Company
- Citizens Electric Corporation
- Pepco
- CitiPower
- Cirro Energy
- Clark Electric Cooperative
- CILCORP
- Choctawhatchee Electric Cooperativ...
- Princeton (MA) Municipal Light Dep...
- CH Energy Group, Inc.
- Public Service Company of Oklahoma
- Public Service of New Hampshire (PSNH)
- Pacific Gas and Electric Company
- Reading Municipal Light Department
- NYSEG
- Southern Connecticut Gas
- Carrollton Utilities
- Urban Energy Source
- Vanguard Energy Services
- Vectren Source
- Visconti Fuel
- Waupun Utilities
- We Energies
- Western Massachusetts Electric Com...
- Wil-Corp, Inc.
- Alameda Power and Telecom
- Wisconsin Energy Corp.
- Wisconsin Public Power Inc.
- Wisconsin Public Service Corporation
- Wisconsin Public Service Corporation
- WPS Energy Services, Inc.
- Alliant Energy Corporation
- AltaLink
- Starlight Electric
- British Gas National Housing Team
- Blue Ridge Electric
- Backus Oil Company
- Beltrami Electric Cooperative

(part 3)
- Bay State Gas
- Kissimmee Utility Authority
- Basin Electric Power Cooperative
- Bangor Hydro
- Baltimore Gas and Electricity
- Atlantic Electric and Gas
- American Gas Management
- American Electric Power
- Ameren Corporation
- Yankee Gas
- Ergon Energy
- Dynamic Ratings -
- Greer Commission of Public Works
- GridAmerica
- Hawaiian Electric Industries
- Duke Energy
- Honeoye Storage Corporation
- Hongkong Electric Holdings
- Hydro Ottawa Holding Inc.
- I And C Heating Services Ltd
- Intermountain Gas Company
- IPALCO Enterprises, Inc.
- Jefferson Utilities
- Kansas Gas Service
- Dominion
- Crisp County Power Commission
- Granite State Electric
- Econogas Propane
- Gaskey
- Escambia River Electric Cooperativ...
- Essex Power Corporation
- FieldForce Services Pty Ltd
- First Choice Power
- First Energy Corporation
- Entergy Corporation
- Flint Energies
- Florida Power & Light Company ...
- Frankfort Plant Board
- Gas Alberta Inc.
- Energy West, Inc.
- Energy Northwest
- Energy Consultants, Inc.
- El Paso Electric Company
- Gaselys
- CP and L
- Korea Electric Power Co.
- Consolidated Power Projects (Pty) Ltd
- National Grid Transco
- National Grid USA
- New West Energy
- Connecticut Valley Electric Exchan...
- New Jersey Natural Gas Company
- Connecticut Natural Gas
- New Richmond Utilities
- Niagara Mohawk Power Corporation
- Nicor Gas
- NIPSCO
- Northeast Utilities
- Conectiv
- Northwest Territories Power Corpor...
- Nova Scotia Power
- National Fuel
- Narragansett Electric
- Nantucket Electric
- Liberty Power Corp.
- LO.GAS S.r.l.
- London Electricity
- Lower Electric, LLC.
- Loy Yang Power
- Consumers Energy
- Massachusetts Electric
- Meridian Energy
- MGE
- Constellation Energy Group
- Milton Hydro
- Minnesota Energy Resources
- Missouri River Energy Services
- Mobil Gas
- Naknek Electric Association : NEA
- CMS Energy