| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | U. O. C., Inc. | Oil Operator | Jun 2019 | |
| 2 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 3 | Uni Production Company, Inc. | Oil & Gas Operator | Apr 1988 | |
| 4 | United Gas Pipe Line Co. | Oil Operator | Aug 1993 | |
| 5 | Universal Oil Co. | Oil Operator | Jan 2025 | |
| 6 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |