| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 2 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 3 | United Resources LP | Austin, TX 78746 | Oil & Gas Operator | Oct 2011 |
| 4 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | Oct 2025 |
| 5 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |