| DNOW | NOW |
| FET | Forum Energy |
| NR | Newpark Resources |
| SOI | Solaris Oilfield Infrastructure |
| PFIE | Profire Energy |
| NINE | Nine Energy Service |
| EFXT | Enerflex |
| NEX | NexTier Oilfield Solutions |
| MRC | MRC Global |
| NGS | Natural Gas Services Group |
| VTOL | Bristow Group |
| AROC | Archrock |
| RNGR | Ranger Energy Services |