| Symbol | Name | Country | Exchange |
|---|---|---|---|
| BOOM | Dynamic Materials Corporation | US | NASDAQ |
| CLB | Core Laboratories N.V. | US | NYSE |
| NEX | NexTier Oilfield Solutions Inc. | US | NYSE |
| RCON | Recon Technology, Ltd. | US | NASDAQ |
| 300164 | Tong Oil Tools | CN | SHE |
| NEJ | Nine Energy Service Inc | DE | F |