| | NUI Corp (Sayre, PA) Natural gas distribution to consumers | |
| | Ohio Valley Gas Corp (Winchester, IN) Corp office for natural gas distribution | |
| | Ohio Valley Gas Corp. (Tell City, IN) Natural gas distribution | |
| | PECO Energy Co (Philadelphia, PA) Electric & gas distribution | |
| | Perfection Corp (Madison, OH) Risers, couplings & gas distribution products | |
| | PPL Gas Utilities Corp (Oxford, PA) Natural gas distribution service | |
| | PS Energy Group Inc (Atlanta, GA) Consumer natural gas distribution services | |
| | Southern Natural Gas Co (Thomasville, GA) Natural gas distribution & transmission | |
| | Southern Union Co (Bloomsburg, PA) Distribution of natural gas | |
| | Stand Energy Inc (Cincinnati, OH) Natural gas distribution | |
| | West Penn Power Co (Greensburg, PA) Electric & gas utility distribution to consumer | |
| | Williams Gas Pipeline-Transco (Comer, GA) Distribution of natural gas | |
| | Wisconsin Fuel & Light Co (Wausau, WI) Natural gas distribution utility | |
| | Wisconsin Gas Co (Wisconsin Rpds, WI) Distribution of natural gas | |
| | Wisconsin Gas Co (Monroe, WI) Retail distribution of natural gas | |
