| PNY | Piedmont Natural Gas Co. | 9.56% |
| SWX | Southwest Gas Corp. | 8.67% |
| NJR | New Jersey Resources Corp. | 8.07% |
| UIL | UIL Holdings Corp. | 7.49% |
| SJI | South Jersey Industries Inc. | 6.43% |
| UNS | UniSource Energy Corp. | 4.87% |
| AVA | Avista Corp. | 4.86% |
| NWN | Northwest Natural Gas Co. | 4.72% |
| NWE | NorthWestern Corp. | 4.69% |
| CHG | CH Energy Group Inc. (Holding Co.) | 4.64% |