| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Unioil | Denver, CO 80203 | Oil & Gas Operator | Jun 2012 |
| 2 | Union Texas Petroleum | Houston, TX 77252 | Oil & Gas Operator | Oct 1991 |
| 3 | United Energy Corporation | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |