| LSE | Leishen Energy Holding Co., Ltd. | | | |
| NCSM | NCS Multistage Holdings, Inc. | | | |
| NESR | National Energy Services Reunited Corp | | | |
| NEXT | NextDecade Corp. | | | |
| NGS | Natural Gas Services Group, Inc. | | | |
| NOA | North American Construction Group Ltd. Common Shares (no par) | | | |
| NOV | NOV Inc. | | | |
| NPKI | NPK International Inc. | | | |
| OII | Oceaneering International, Inc. | | | |
| OIS | Oil States International, Inc. | | | |
| OMSE | OMS Energy Technologies Inc. | | | |
| PUMP | ProPetro Holding Corp. | | | |
| RCON | Recon Technology, Ltd. | | | |
| RES | RPC, Inc. | | | |
| RNGR | Ranger Energy Services, Inc. Class A | | | |
| SEI | Solaris Energy Infrastructure, Inc. Class A | | | |
| SLB | SLB Limited | | | |
| SND | Smart Sand, Inc. | | | |
| STAK | STAK Inc. | | | |
| TDW | Tidewater Inc. | | | |
