1 | U.S. Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
2 | Ultra Oil & Gas, Inc. | Centerton, AR 72719 | Oil & Gas Operator | Dec 2024 |
3 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
4 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
5 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2024 |
6 | United Oil & Minerals L. P. | Austin, TX 78746 | Oil & Gas Operator | Jun 2003 |
7 | United Oil & Minerals, Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2001 |
8 | United Resources LP | Austin, TX 78746 | Oil & Gas Operator | Oct 2011 |
9 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | Dec 2024 |
10 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |
11 | Unoso Operating Company L.L.C. | Georgetown, TX 78633 | Oil & Gas Operator | Dec 2024 |
12 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2024 |
13 | Us Petro LP | Amarillo, TX 79106 | Oil & Gas Operator | Apr 2020 |