| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | U. D. Man, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Dec 2024 |
| 2 | Union Crude Operating Co. | Baytown, TX 77521 | Oil Operator | Aug 2003 |
| 3 | Union Seaboard Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 4 | Universal Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2002 |
| 5 | Upstream Properties, LLC | Southlake, TX 76092 | Oil & Gas Operator | Dec 2024 |