| DNOW | NOW |
| NOA | North American Construction Group |
| DRQ | Dril-Quip |
| CCLP | CSI Compressco LP |
| FET | Forum Energy |
| NR | Newpark Resources |
| SOI | Solaris Oilfield Infrastructure |
| GEOS | Geospace |
| NINE | Nine Energy Service |
| EFXT | Enerflex |
| MRC | MRC Global |
| NGS | Natural Gas Services Group |
| NOV | NOV |
| VTOL | Bristow Group |
| RNGR | Ranger Energy Services |