| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | U S Liquids Of La., L.P. | Oil Operator | Apr 2014 | |
| 2 | Union Exploration Partners, LTD. | Oil & Gas Operator | Aug 1990 | |
| 3 | United Investment Group | Oil Operator | Nov 2004 | |
| 4 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |
| 5 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |