| 11601 | United States Gypsum Co | Oakfield, NY 14125 | Oil & Gas Operator | Dec 2024 |
| 11602 | United Texas Oil LLC | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 11603 | United Texas Petroleum Inc. | McKinney, TX 75070 | Oil & Gas Operator | Oct 2025 |
| 11604 | United World Energy, Inc. | Aurora, CO 80040 | Oil & Gas Operator | Oct 2025 |
| 11605 | Unitex Oil & Gas, L.L.C. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 11606 | Universal Geopower LLC | Houston, TX 77057 | Oil & Gas Operator | May 2016 |
| 11607 | Universal Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2002 |
| 11608 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |
| 11609 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 11610 | Unocal Exploration Corporation | Houston, TX 77001 | Oil & Gas Operator | May 1992 |
| 11611 | Unoco, Inc. | Kerrville, TX 78029 | Oil & Gas Operator | Jan 1999 |
| 11612 | Unoso Operating Company L.L.C. | Georgetown, TX 78633 | Oil & Gas Operator | Oct 2025 |
| 11613 | Unswept Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Jan 2018 |
| 11614 | Untamed Resources, LLC | Spearman, TX 79081 | Gas Operator | Oct 2025 |
| 11615 | Uosi Operating, Inc. | Lovelady, TX 75851 | Oil & Gas Operator | Oct 2025 |
| 11616 | Upco | Mineral Wells, TX 76068 | Gas Operator | Sep 2001 |
| 11617 | Upcurve Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 11618 | Upda Operators, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2009 |
| 11619 | Upham Oil & Gas Company | Mineral Wells, TX 76068 | Oil & Gas Operator | Oct 2025 |
| 11620 | Upham, Chester R., Jr. | Mineral Wells, TX 76067 | Oil & Gas Operator | Aug 2001 |
| 11621 | Uphill Consulting LLC | Pearland, TX 77584 | Oil & Gas Operator | Oct 2025 |
| 11622 | Upland Exploration, LLC | Boerne, TX 78006 | Oil & Gas Operator | Jul 2024 |
| 11623 | Upland Operating, LLC | Dallas, TX 75226 | Oil & Gas Operator | Oct 2025 |
| 11624 | Upland Production Company | Edmond, OK 73083 | Oil & Gas Operator | Oct 2025 |
| 11625 | Upland Resources LLC | Canadian, TX 79014 | Oil & Gas Operator | Oct 2025 |
| 11626 | Upland Resources, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Dec 2009 |
| 11627 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Jun 2025 |
| 11628 | Uplift Production Company, Inc. | Shamrock, TX 79079 | Oil & Gas Operator | Feb 1999 |
| 11629 | Upp Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 11630 | Upstream Exploration LLC | Metairie, LA 70002 | Oil & Gas Operator | Jan 2020 |
| 11631 | Upstream Properties, LLC | Southlake, TX 76092 | Oil & Gas Operator | Oct 2025 |
| 11632 | Upstream Resource Partners, LLC | Elkhart, TX 75839 | Oil Operator | Oct 2025 |
| 11633 | Uptex Operating Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2011 |
| 11634 | Uptex Operating, L.P. | Dallas, TX 75201 | Oil & Gas Operator | May 2010 |
| 11635 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 11636 | Ursa Operating Company LLC | Denver, CO 80265 | Oil & Gas Operator | Dec 2020 |
| 11637 | Ursus Oil And Gas | Tyler, TX 75703 | Oil & Gas Operator | Oct 2025 |
| 11638 | Us Ecology Winnie, LLC | Winnie, TX 77665 | Oil Operator | Oct 2025 |
| 11639 | Us Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Dec 2021 |
| 11640 | Us Energy Holdings, LLC | Richardson, TX 75080 | Oil & Gas Operator | Oct 2025 |
| 11641 | Us Petro LP | Amarillo, TX 79106 | Oil & Gas Operator | Apr 2020 |
| 11642 | Us. Fuels, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 11643 | USA Superior Energy LLC | Houston, TX 77077 | Oil Operator | Mar 2010 |
| 11644 | USA Tubulars, Inc. | Valley Spring, TX 76885 | Oil & Gas Operator | Dec 1995 |
| 11645 | Usfg Oil & Gas, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2005 |
| 11646 | Utility Ventures Company | Pasadena, TX 77504 | Oil & Gas Operator | Oct 2025 |
| 11647 | Utoco, LTD. | Midland, TX 79704 | Oil Operator | Oct 2025 |
| 11648 | Uvalde Energy Co. | Austin, TX 78747 | Oil & Gas Operator | Nov 1994 |
| 11649 | V & H Oil, L.P. | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 11650 | V S Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Oct 2025 |
| 11651 | V-F Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 11652 | V/J Oil Company | Yancey, TX 78886 | Oil & Gas Operator | Oct 2015 |
| 11653 | Vaalco Energy (USA), Inc. | Houston, TX 77042 | Oil & Gas Operator | Dec 2016 |
| 11654 | Vac-U-Lift Production Co.,Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | Oct 2025 |
| 11655 | Vaca Operating Company LLC | Pacific PLSDS, CA 90272 | Oil & Gas Operator | Aug 2017 |
| 11656 | Vale Petroleum Corporation | Houston, TX 77042 | Gas Operator | Jan 1995 |
| 11657 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Oct 2025 |
| 11658 | Valentine Oil & Gas, L.C. | Carmine, TX 78932 | Oil Operator | Nov 2018 |
| 11659 | Valera Oil Company | Kingsland, TX 78639 | Oil & Gas Operator | Apr 2000 |
| 11660 | Valerius, Inc. & Zine, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jul 1994 |
| 11661 | Valerius, Robert D. Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Aug 2003 |
| 11662 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 11663 | Validus NRG Aquilas Assetco LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2022 |
| 11664 | Validus Operating Inc. | Port Aransas, TX 78373 | Oil & Gas Operator | Oct 1998 |
| 11665 | Valla Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Aug 2003 |
| 11666 | Valley Gathering Company | Midland, TX 79702 | Oil & Gas Operator | Feb 1997 |
| 11667 | Valley Petrochemicals, LLC | Pharr, TX 78577 | Oil Operator | Oct 2025 |
| 11668 | Valley Petroleum Company | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 11669 | Valley Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Aug 2003 |
| 11670 | Valor Energy, LLC | Dallas, TX 75205 | Oil & Gas Operator | May 2023 |
| 11671 | Valpoint Operating, LLC | Amarillo, TX 79101 | Oil & Gas Operator | Oct 2025 |
| 11672 | Vamos Oil & Gas, LLC | Miami, FL 33129 | Oil & Gas Operator | Oct 2025 |
| 11673 | Van Oil Co Inc | Fort Worth, TX 76116 | Oil Operator | Dec 1997 |
| 11674 | Van Operating, LTD. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 11675 | Van Tol Oil | Sanger, TX 76266 | Oil & Gas Operator | Oct 2025 |
| 11676 | Van Winkle Oil | Floresville, TX 78114 | Oil & Gas Operator | Oct 2025 |
| 11677 | Vanco Oil & Gas Corp. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 11678 | Vandermeer Energy Corp. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1998 |
| 11679 | Vandeveer Energy, LLC | Dallas, TX 75225 | Oil & Gas Operator | Jul 2016 |
| 11680 | Vanek, R. J. | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 11681 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2021 |
| 11682 | Vanguard Permian LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 11683 | Vanguard Production Company | Lubbock, TX 79410 | Oil & Gas Operator | Oct 2025 |
| 11684 | Vannatter, Louis E. | Medina, TX 78055 | Oil & Gas Operator | Dec 1996 |
| 11685 | Vantage Fort Worth Energy LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Oct 2017 |
| 11686 | Vantage Operating II, LLC | San Antonio, TX 78230 | Oil & Gas Operator | Oct 2025 |
| 11687 | Vantage Operating, LLC | San Antonio, TX 78230 | Oil & Gas Operator | Oct 2025 |
| 11688 | Vantage Point Operating Co | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 11689 | Vanya Oil & Gas, Inc. | Hardin, TX 77561 | Oil & Gas Operator | Oct 2025 |
| 11690 | Vaquero Gas Company,Incorporated | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 11691 | Vaquero Oil & Gas, Inc. | League City, TX 77573 | Oil & Gas Operator | Aug 2008 |
| 11692 | Vaquero Operating | FT Stockton, TX 79735 | Oil & Gas Operator | Oct 2025 |
| 11693 | Vaquillas Operating, Inc. | Laredo, TX 78041 | Oil & Gas Operator | Dec 2002 |
| 11694 | Varas Energy Operating Company, LLC | Houston, TX 77005 | Oil & Gas Operator | Oct 2025 |
| 11695 | Vargas Energy, LTD. | Fort Worth, TX 76109 | Gas Operator | Oct 2025 |
| 11696 | Vargas Oil & Gas | San Antonio, TX 78240 | Oil Operator | Oct 2025 |
| 11697 | Vast Oil TX Operating LLC | Fullerton, CA 92832 | Oil & Gas Operator | Oct 2025 |
| 11698 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Jun 2025 |
| 11699 | Vaughan Operating Company, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2009 |
| 11700 | Vaughan Production Company, Inc. | Norman, OK 73072 | Oil & Gas Operator | Sep 2014 |