| RES | RPC |
| FTI | TechnipFMC |
| OII | Oceaneering |
| BKR | Baker Hughes |
| OIS | Oil States |
| FET | Forum Energy |
| NR | Newpark Resources |
| PUMP | ProPetro |
| SOI | Solaris Oilfield Infrastructure |
| GEOS | Geospace |
| EFXT | Enerflex |
| NEX | NexTier Oilfield Solutions |
| VTOL | Bristow Group |
| CHX | ChampionX |
| AROC | Archrock |
| RNGR | Ranger Energy Services |