| 30701 | Urroz Oil & Gas LLC | Evanston, WY 82931 | Oil & Gas Operator | Jun 2020 |
| 30702 | Ursa Major (Crow Og), LLC | Billings, MT 59101 | Gas Operator | Aug 2017 |
| 30703 | Ursa Operating Company LLC | Denver, CO 80265 | Oil & Gas Operator | Dec 2020 |
| 30704 | Ursus Oil And Gas | Tyler, TX 75703 | Oil & Gas Operator | May 2025 |
| 30705 | Us Ecology Winnie, LLC | Winnie, TX 77665 | Oil Operator | May 2025 |
| 30706 | Us Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Dec 2021 |
| 30707 | Us Energy Dev Corp | Getzville, NY 14068-1558 | Oil & Gas Operator | Dec 2021 |
| 30708 | Us Energy Exploration Corp | Rural Valley, PA 16249 | Oil & Gas Operator | Jan 2025 |
| 30709 | Us Energy Holdings, LLC | Richardson, TX 75080 | Oil & Gas Operator | May 2025 |
| 30710 | Us Energy Oh LLC | Rural Valley, PA 16249 | Oil & Gas Operator | Dec 2024 |
| 30711 | Us Gypsum Co | Oakfield, NY 14125-9722 | Gas Operator | Dec 2005 |
| 30712 | Us Liquids Of La, LTD | | Oil Operator | Jul 2002 |
| 30713 | Us Oil & Gas Inc | Marietta, OH 45750 | Oil & Gas Operator | Mar 2025 |
| 30714 | Us Oil Resources LLC | Lakewood, CO 80123 | Oil Operator | Jan 2025 |
| 30715 | Us Ore Corporation | Pacific Beach, CA 92109 | Oil Operator | Feb 2014 |
| 30716 | Us Petro LP | Amarillo, TX 79106 | Oil & Gas Operator | Apr 2020 |
| 30717 | Us. Fuels, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 30718 | USA Energy LLC | Lance Creek, WY 82222 | Oil & Gas Operator | Nov 2024 |
| 30719 | USA Exploration & Production LLC | Mills, WY 82644 | Oil & Gas Operator | Sep 2012 |
| 30720 | USA Superior Energy LLC | Houston, TX 77077 | Oil Operator | Mar 2010 |
| 30721 | USA Tubulars, Inc. | Valley Spring, TX 76885 | Oil & Gas Operator | Dec 1995 |
| 30722 | Uscan Oil Inc | Oil City, PA 16301-1412 | Oil & Gas Operator | Dec 1991 |
| 30723 | Usedc Okc LLC | Getzville, NY 14068-1296 | Oil & Gas Operator | May 2018 |
| 30724 | Usfg Oil & Gas, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2005 |
| 30725 | Usins Oil Compan | | Oil Operator | Jan 1993 |
| 30726 | Usx Operating Co., Inc. | Barnstall, OK 74002 | Oil & Gas Operator | Apr 2017 |
| 30727 | Utah Gas Op LTD | Rangely, CO 81648 | Oil & Gas Operator | Mar 2025 |
| 30728 | Utah Oil LLC | Rantoul, KS 66079 | Oil Operator | Jan 2025 |
| 30729 | Utah-Westar DRL Ventures | Dallas, TX 75201 | Oil & Gas Operator | Nov 1987 |
| 30730 | Ute Energy Upstream Holdings LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2012 |
| 30731 | Utex Oil Company | Elko, NV 89803 | Oil & Gas Operator | Dec 1988 |
| 30732 | Utica Resource Operating LLC | Marietta, OH 45750 | Oil & Gas Operator | Sep 2023 |
| 30733 | Utility Ventures Company | Pasadena, TX 77504 | Oil & Gas Operator | May 2025 |
| 30734 | Utoco, LTD. | Midland, TX 79704 | Oil Operator | May 2025 |
| 30735 | Uvalde Energy Co. | Austin, TX 78747 | Oil & Gas Operator | Nov 1994 |
| 30736 | V & F Oil Company, A General Partnership | Hays, KS 67601 | Oil Operator | Jan 2025 |
| 30737 | V & H Oil, L.P. | Muenster, TX 76252 | Oil & Gas Operator | May 2025 |
| 30738 | V & R Oil | | Oil Operator | Jan 2025 |
| 30739 | V & R Production, Inc | La Plata, NM 87418 | Oil & Gas Operator | Oct 2006 |
| 30740 | V A B Inc | Weleetka, OK 74880 | Oil & Gas Operator | Jan 2007 |
| 30741 | V A Resources LLC | Casper, WY 82601 | Oil Operator | Apr 2016 |
| 30742 | V C P Michigan, LLC | | Oil & Gas Operator | Mar 2025 |
| 30743 | V L Pittman PC & Producer, Inc | | Oil & Gas Operator | Jul 1989 |
| 30744 | V S Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | May 2025 |
| 30745 | V-F Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 30746 | V. E. Karnes | | Oil Operator | Jun 1989 |
| 30747 | V. Francis Weigel Family Partnership LLC | Gorham, KS 67640 | Oil Operator | Jan 2025 |
| 30748 | V. H. Brumley | | Oil Operator | Jul 1994 |
| 30749 | V. Monta Currie, Jr. | | Oil Operator | Jun 2007 |
| 30750 | V. R. Oil Co. | | Oil Operator | Jan 2025 |
| 30751 | V/J Oil Company | Yancey, TX 78886 | Oil & Gas Operator | Oct 2015 |
| 30752 | Vaalco Energy (USA), Inc. | Houston, TX 77042 | Oil & Gas Operator | Dec 2016 |
| 30753 | Vac Petroleum Co | | Oil Operator | Dec 1990 |
| 30754 | Vac-U-Lift Production Co.,Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | May 2025 |
| 30755 | Vaca Energy LLC | | Oil & Gas Operator | Feb 2025 |
| 30756 | Vaca Operating Company LLC | Pacific PLSDS, CA 90272 | Oil & Gas Operator | Aug 2017 |
| 30757 | Vaco Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2003 |
| 30758 | Vail Energy/Enma | | Oil Operator | Oct 1987 |
| 30759 | Val Energy, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 30760 | Valancy Operating LLC | Goldsby, OK 73093 | Oil & Gas Operator | Mar 2025 |
| 30761 | Valar Petroleum Inc | Houston, TX 77069 | Oil & Gas Operator | May 2006 |
| 30762 | Vale Petroleum Corporation | Houston, TX 77042 | Gas Operator | Jan 1995 |
| 30763 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | May 2025 |
| 30764 | Valentine Oil & Gas, L.C. | Carmine, TX 78932 | Oil Operator | Nov 2018 |
| 30765 | Valentine Oil Properties | Lowell, OH 45744 | Oil & Gas Operator | Dec 1997 |
| 30766 | Valera Oil Company | Kingsland, TX 78639 | Oil & Gas Operator | Apr 2000 |
| 30767 | Valerius, Inc. & Zine, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jul 1994 |
| 30768 | Valerius, Robert D. Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Aug 2003 |
| 30769 | Valero Producing Company | | Oil Operator | Sep 1987 |
| 30770 | Valiant Oil & Inv Co | | Oil & Gas Operator | Feb 2025 |
| 30771 | Valid Energy Company | | Oil & Gas Operator | Feb 2025 |
| 30772 | Validus Energy II Midcon LLC | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 30773 | Validus NRG Aquilas Assetco LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2022 |
| 30774 | Validus Operating Inc. | Port Aransas, TX 78373 | Oil & Gas Operator | Oct 1998 |
| 30775 | Valjohn Energy Corporation | Oklahoma City, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 30776 | Valkyrie Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 30777 | Valla Energy Corporation | Odessa, TX 79762 | Oil & Gas Operator | Aug 2003 |
| 30778 | Vallecito Gas L.L.C. | Farmington, NM 87499 | Oil Operator | May 2012 |
| 30779 | Valley Energy Expl. | | Oil & Gas Operator | Dec 1984 |
| 30780 | Valley Energy Resources Inc. | | Oil & Gas Operator | Dec 2006 |
| 30781 | Valley Gathering Company | Midland, TX 79702 | Oil & Gas Operator | Feb 1997 |
| 30782 | Valley Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 30783 | Valley Operating Inc | Denver, CO 80218-3633 | Oil & Gas Operator | Jan 2004 |
| 30784 | Valley Petrochemicals, LLC | Pharr, TX 78577 | Oil Operator | May 2025 |
| 30785 | Valley Petrol Consulting Inc | Denton, TX 76205 | Oil Operator | Feb 2025 |
| 30786 | Valley Petroleum Company | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 30787 | Valley Petroleum Management | Utica, OH 43080 | Oil & Gas Operator | Dec 2024 |
| 30788 | Valley Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Aug 2003 |
| 30789 | Valor Energy, LLC | Dallas, TX 75205 | Oil & Gas Operator | May 2023 |
| 30790 | Valpoint Operating, LLC | Amarillo, TX 79101 | Oil & Gas Operator | May 2025 |
| 30791 | Vamco Operations | | Oil & Gas Operator | Jan 2025 |
| 30792 | Vamos Oil & Gas, LLC | Miami, FL 33129 | Oil & Gas Operator | May 2025 |
| 30793 | Van Buskirk Bill | | Oil Operator | Dec 1996 |
| 30794 | Van Buskirk, Billy L. | Severy, KS 67137 | Oil Operator | Dec 2009 |
| 30795 | Van Dall, Don | | Oil Operator | Mar 2015 |
| 30796 | Van Hampton Gas & Oil Co Inc | Pleasantville, PA 16341-0329 | Gas Operator | Dec 2020 |
| 30797 | Van Horn I H | Tulsa, OK 74145-5715 | Oil & Gas Operator | Mar 2001 |
| 30798 | Van Horn Oil & Gas Inc | Tulsa, OK 74170 | Oil & Gas Operator | Nov 1998 |
| 30799 | Van Horn Oil Company | Ada, OK 74820 | Oil & Gas Operator | Oct 1999 |
| 30800 | Van Lingen, Peter | Nashville, TN 37215 | Oil Operator | Dec 2023 |