| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Uinta Oil & Gas | Roosevelt, UT 84066 | Oil & Gas Operator | Nov 1997 |
| 2 | Uinta Wax Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 3 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 4 | United Producing Co Inc | Oil & Gas Operator | May 1961 | |
| 5 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |
| 6 | Utex Oil Company | Elko, NV 89803 | Oil & Gas Operator | Dec 1988 |