| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Union Exploration Partners, LTD. | Oil & Gas Operator | Aug 1990 | |
| 2 | United Gas Pipe Line Co. | Oil Operator | Aug 1993 | |
| 3 | Unocal Exploration Corporation | Houston, TX 77001 | Oil & Gas Operator | May 1992 |