| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Halcon Opr Co Inc | Houston, TX 77002-5005 | Oil & Gas Operator | Jul 2017 |
| 2 | Harmony Oil & Gas Co Inc | Reno, NV 89509 | Oil Operator | Dec 1994 |
| 3 | Howard Drilling Inc | Mount Jewett, PA 16740-0556 | Oil & Gas Operator | Dec 2024 |