| | AGL Resources Inc Gas distribution utility | |
| | ANR Pipeline Co Natural gas distribution services | |
| | Atlanta Gas Light Co Natural gas distribution consumers | |
| | Atlanta Gas Light Co Natural gas distribution center | |
| | Chesapeake Utilities Corp Residential & commercial natural gas distribution | |
| | City Gas Co Distribution of natural gas | |
| | City Of La Grange Utility Svc Consumer natural gas distribution; water & electricity generation services | |
| | CMS Marketing Services/Trading Electric & gas distribution service | |
| | Columbia Gas Natural gas distribution | |
| | Consumers Energy Electric power & natural gas distribution to consumers | |
| | District Petroleum Products Gas production & distribution service | |
| | Dominion Transmission Inc Natural gas transmission & distribution | |
| | Dominion Transmission Inc Natural gas distribution to consumers | |
| | Energy Cooperative Family Electric & natural gas power distribution | |
| | Energy One/Michigan Gas Natural gas distribution for southwest Michigan | |
