| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | U. S. Operating, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Apr 2024 |
| 2 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 3 | Upham Oil & Gas Company | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2024 |
| 4 | Uptex Operating Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2011 |
| 5 | Uptex Operating, L.P. | Dallas, TX 75201 | Oil & Gas Operator | May 2010 |