| RES | RPC |
| FTI | TechnipFMC |
| OII | Oceaneering |
| CCLP | CSI Compressco LP |
| HLX | Helix Energy Solutions Group |
| OIS | Oil States |
| FET | Forum Energy |
| NR | Newpark Resources |
| SOI | Solaris Oilfield Infrastructure |
| EFXT | Enerflex |
| MRC | MRC Global |
| NGS | Natural Gas Services Group |
| NOV | NOV |
| RNGR | Ranger Energy Services |