| CCLP | CSI Compressco LP |
| DNOW | NOW |
| DRQ | Dril-Quip |
| EFXT | Enerflex |
| GEOS | Geospace |
| HLX | Helix Energy Solutions Group |
| MRC | MRC Global |
| NGS | Natural Gas Services Group |
| NOA | North American Construction Group |
| NR | Newpark Resources |
| OII | Oceaneering |
| OIS | Oil States |
| RES | RPC |
| VTOL | Bristow Group |