| LBRT | Liberty Energy |
| HLX | Helix Energy Solutions Group |
| NR | Newpark Resources |
| SOI | Solaris Oilfield Infrastructure |
| PUMP | ProPetro |
| GEOS | Geospace |
| NINE | Nine Energy Service |
| SLCA | U.S. Silica |
| NEX | NexTier Oilfield Solutions |
| MRC | MRC Global |
| NGS | Natural Gas Services Group |
| RNGR | Ranger Energy Services |