| 4701 | Ty-Tex Exploration, Inc. | Tyler, TX 75711 | Oil Operator | Dec 2000 |
| 4702 | Tygr Operating Company, LLC | | Oil & Gas Operator | Nov 2024 |
| 4703 | Tyler Production, LLC | | Oil & Gas Operator | Jul 2013 |
| 4704 | Tysco Oil And Gas Corp. | | Oil & Gas Operator | Dec 2024 |
| 4705 | Tyson Oil Co. | | Oil Operator | Jan 2025 |
| 4706 | U R C C | | Oil & Gas Operator | Jun 1991 |
| 4707 | U S Exploraton Liq Trust | | Oil & Gas Operator | Oct 1994 |
| 4708 | U S Liquids Of La., L.P. | | Oil Operator | Apr 2014 |
| 4709 | U. D. Man, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Sep 2026 |
| 4710 | U. O. C., Inc. | | Oil Operator | Jun 2019 |
| 4711 | U. S. Operating, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jul 2025 |
| 4712 | U.S. Capital Corp Of Am, Inc. | | Oil & Gas Operator | Aug 1998 |
| 4713 | U.S. Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 4714 | Ultramar Oil & Gas LTD | Houston, TX 77060 | Oil & Gas Operator | Jul 1995 |
| 4715 | Ultramar Production Company | | Oil & Gas Operator | Dec 1991 |
| 4716 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 4717 | Uni Production Company, Inc. | | Oil & Gas Operator | Apr 1988 |
| 4718 | Unifid Oil & Gas Corp. | | Oil & Gas Operator | Mar 1994 |
| 4719 | Union Diversified, Inc. | | Gas Operator | Dec 2008 |
| 4720 | Union Drilling &Management Inc | | Gas Operator | Feb 1991 |
| 4721 | Union Expl. Partners, LTD. | | Oil & Gas Operator | Aug 1990 |
| 4722 | Union Gas Operating Company | Spring, TX 77391 | Oil & Gas Operator | Sep 2026 |
| 4723 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 4724 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Jan 2001 |
| 4725 | Union Texas Petroleum Corp | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 4726 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Sep 2026 |
| 4727 | United Gas Pipe Line Co. | | Oil Operator | Aug 1993 |
| 4728 | United Investment Group | | Oil Operator | Nov 2004 |
| 4729 | United Operators, Inc. | | Oil Operator | Sep 1999 |
| 4730 | United Petroleum Corporation | Edgwater, CO 80214 | Oil & Gas Operator | May 1996 |
| 4731 | United Southern Resources Inc. | | Gas Operator | Nov 2013 |
| 4732 | United World Energy Corporation | | Oil & Gas Operator | Dec 2024 |
| 4733 | Universal Drilling Company | Denver, CO 80203 | Oil & Gas Operator | Sep 2003 |
| 4734 | Universal Land | | Oil Operator | Dec 2024 |
| 4735 | Universal Oil Co. | | Oil Operator | Jan 2025 |
| 4736 | Universal Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2002 |
| 4737 | Universal Producers, Inc. | | Oil Operator | Jun 2001 |
| 4738 | Universal Resources Corp. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jan 2000 |
| 4739 | University Field Management LLC | | Oil Operator | Nov 2024 |
| 4740 | Unocal Exploration Corporation | | Oil & Gas Operator | May 1992 |
| 4741 | Upstream Exploration LLC | Metairie, LA 70002 | Oil & Gas Operator | Jan 2020 |
| 4742 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Sep 2026 |
| 4743 | Us Liquids Of La, LTD | | Oil Operator | Jul 2002 |
| 4744 | Us Oil & Gas Inc | Marietta, OH 45750 | Oil & Gas Operator | Jul 2026 |
| 4745 | V L Pittman PC & Producer, Inc | | Oil & Gas Operator | Jul 1989 |
| 4746 | V. E. Karnes | | Oil Operator | Jun 1989 |
| 4747 | V. H. Brumley | | Oil Operator | Jul 1994 |
| 4748 | V. Monta Currie, Jr. | | Oil Operator | Jun 2007 |
| 4749 | Vale Petroleum Corporation | Houston, TX 77042 | Gas Operator | Jan 1995 |
| 4750 | Valerius, Inc. & Zine, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jul 1994 |
| 4751 | Vamos Oil & Gas, LLC | Miami, FL 33129 | Oil & Gas Operator | Sep 2026 |
| 4752 | Van Operating, LTD. | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 4753 | Van Zanten, Inc. | | Gas Operator | Jan 1990 |
| 4754 | Vanguard Environmental, LLC | | Oil Operator | Nov 2024 |
| 4755 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Jan 2021 |
| 4756 | Vanguard Petroleum Corp. | | Gas Operator | Jun 1986 |
| 4757 | Vantage Point Operating Co. | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 4758 | Vaquero Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 4759 | Varco Oil | | Oil & Gas Operator | Apr 1991 |
| 4760 | Vast Oil Inc | Fullerton, CA 92832 | Oil & Gas Operator | Mar 2024 |
| 4761 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | May 2026 |
| 4762 | Vaughn Petroleum, Inc. | Dallas, TX 75219 | Oil & Gas Operator | May 2004 |
| 4763 | Vector Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Sep 2026 |
| 4764 | Vector Minerals Corporation | Aurora, CO 80015 | Oil & Gas Operator | Jun 2026 |
| 4765 | Vega Oil & Gas MGMT., Inc. | | Oil & Gas Operator | Aug 1981 |
| 4766 | Velandera Energy Partners LLC | | Oil & Gas Operator | Nov 2024 |
| 4767 | Venado Petroleum Corporation | Dallas, TX 75231 | Oil & Gas Operator | May 2012 |
| 4768 | Ventex Operating Corp. | Addison, TX 75001 | Oil & Gas Operator | Sep 2026 |
| 4769 | Venture Oil & Gas Inc. | Laurel, MS 39440 | Oil & Gas Operator | Jun 2026 |
| 4770 | Venture Oil Company Of Texas | | Oil Operator | Sep 1988 |
| 4771 | Ventures Oil & Gas Of La Inc. | | Oil & Gas Operator | Jun 1999 |
| 4772 | Venvirotek Of Louisiana, Inc. | | Oil Operator | Apr 2002 |
| 4773 | Verado Energy, Inc. | Allen, TX 75013 | Oil & Gas Operator | Oct 2025 |
| 4774 | Vermilion Bay Land Co. | | Oil & Gas Operator | Dec 1994 |
| 4775 | Vermilion Exploration, Inc. | | Oil & Gas Operator | Dec 1982 |
| 4776 | Vermilion Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Sep 2009 |
| 4777 | Vermillion Energy & Dev. Corp. | | Oil & Gas Operator | Jul 1991 |
| 4778 | Vern Wilson Energy Inc. | | Oil & Gas Operator | Dec 2011 |
| 4779 | Verna Petroleum Company | | Oil & Gas Operator | Jun 1992 |
| 4780 | Vernon Bradford | | Oil Operator | Apr 1992 |
| 4781 | Vernon E. Faulconer | | Oil & Gas Operator | Dec 1996 |
| 4782 | Vernon E. Faulconer, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2024 |
| 4783 | Verona Energy, Inc. | | Oil & Gas Operator | Nov 2024 |
| 4784 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 4785 | Vetra Exploration And Production LLC | | Oil & Gas Operator | Aug 2012 |
| 4786 | Vibe Resources LLC | | Oil & Gas Operator | Dec 2024 |
| 4787 | Victoria Land & Investment Co. | | Oil & Gas Operator | Jan 1985 |
| 4788 | Victory Financial Group, Inc. | | Oil & Gas Operator | Sep 2002 |
| 4789 | Viking Oil Co. | | Oil & Gas Operator | Dec 1990 |
| 4790 | Viking Resources | | Oil & Gas Operator | Sep 1995 |
| 4791 | Vinbar Oil & Gas, LLC | | Oil & Gas Operator | Jan 2018 |
| 4792 | Vine Energy Operating LP | | Gas Operator | Oct 2021 |
| 4793 | Vine Oil & Gas LP | | Gas Operator | Apr 2021 |
| 4794 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jun 2026 |
| 4795 | Vinyard And Sons | | Oil & Gas Operator | Oct 2009 |
| 4796 | Virgil L. Pittman | | Oil & Gas Operator | Jun 1983 |
| 4797 | Virgin Offshore U.S.A., Inc. | | Oil & Gas Operator | Oct 2012 |
| 4798 | Virtex Petroleum Company, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Jan 2008 |
| 4799 | Vision Natural Res-La, LLC | | Oil Operator | Dec 2024 |
| 4800 | Vista Corporation | | Oil & Gas Operator | Jan 2011 |