| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | U R C C | Oil & Gas Operator | Jun 1991 | |
| 2 | Union Exploration Partners, LTD. | Oil & Gas Operator | Aug 1990 | |
| 3 | Union Texas Petroleum Corp. | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 4 | United Gas Pipe Line Co. | Oil Operator | Aug 1993 | |
| 5 | Us Oil & Gas Inc | Marietta, OH 45750 | Oil & Gas Operator | Feb 2024 |