| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Ultra Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Feb 2024 |
| 2 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 3 | United Natural Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2020 |
| 4 | United Natural Resources Corp | Oil Operator | Jan 1986 | |
| 5 | Us Ore Corporation | Pacific Beach, CA 92109 | Oil Operator | Feb 2014 |