| Symbol | Name | Country | Exchange |
|---|---|---|---|
| DK | Delek US Holdings, Inc. | US | NYSE |
| DKL | Delek Logistics Partners, L.P. | US | NYSE |
| ET | Energy Transfer LP | US | NYSE |
| OGE | OGE Energy Corporation | US | NYSE |
| RRC | Range Resources Corporation | US | NYSE |
| WMB | Williams Companies, Inc. (The) | US | NYSE |