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