| PNY | Piedmont Natural Gas Co Inc | 10.11% |
| SWX | Southwest Gas Corp | 8.64% |
| UIL | UIL Holdings Corp | 7.68% |
| UNS | UNS Energy Corp | 7.45% |
| NJR | New Jersey Resources Corp | 7.11% |
| LG | Laclede Group Inc/The | 6.71% |
| EE | El Paso Electric Co | 4.54% |
| SJI | South Jersey Industries Inc | 4.51% |
| NWE | NorthWestern Corp | 4.43% |
| ALE | ALLETE Inc | 4.42% |