| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | U S Energy Corp | Houston, TX 77057 | Oil & Gas Operator | Dec 2021 |
| 2 | U V Industries | Oil & Gas Operator | Jan 1993 | |
| 3 | Underwood Oil & Gas | Casper, WY 82602 | Oil & Gas Operator | Mar 2025 |
| 4 | Universal Fuels Company | Oil & Gas Operator | Oct 1993 | |
| 5 | Updike Resources Inc | Newcastle, WY 82701 | Oil & Gas Operator | Jun 1998 |
| 6 | USA Exploration & Production LLC | Mills, WY 82644 | Oil & Gas Operator | Sep 2012 |