| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Harcor Exploration Inc. | Oil Operator | Aug 1989 | |
| 2 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 3 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Oct 2025 |