| 29601 | Unrein Oil Co | | Oil Operator | Dec 2023 |
| 29602 | Unruh, Elmer | Galva, KS 67443 | Oil & Gas Operator | Aug 1998 |
| 29603 | Unruh, Mark D. | Peru, KS 67360 | Oil Operator | Sep 2011 |
| 29604 | Unswept Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Jan 2018 |
| 29605 | Untener Bishop Kenneth (Diocese Of Saginaw) | | Oil Operator | Dec 2023 |
| 29606 | Uosi Operating, Inc. | Lovelady, TX 75851 | Oil & Gas Operator | Apr 2024 |
| 29607 | Upcurve Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 29608 | Upda Operators, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2009 |
| 29609 | Updike Resources Inc | Newcastle, WY 82701 | Oil & Gas Operator | Jun 1998 |
| 29610 | Upham Oil & Gas Company | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2024 |
| 29611 | Upham, Chester R., Jr. | Mineral Wells, TX 76067 | Oil & Gas Operator | Aug 2001 |
| 29612 | Upland Exploration LLC | | Oil & Gas Operator | Jan 2024 |
| 29613 | Upland Operating, LLC | Dallas, TX 75226 | Oil & Gas Operator | Apr 2024 |
| 29614 | Upland Production Company | Edmond, OK 73083 | Oil & Gas Operator | Apr 2024 |
| 29615 | Upland Resources | | Oil Operator | Jul 1983 |
| 29616 | Upland Resources LLC | Canadian, TX 79014 | Oil & Gas Operator | Apr 2024 |
| 29617 | Upland Resources, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Dec 2009 |
| 29618 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Jan 2024 |
| 29619 | Uplift Production Company, Inc. | Shamrock, TX 79079 | Oil & Gas Operator | Feb 1999 |
| 29620 | Upp Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 29621 | Upstream Exploration LLC | Metairie, LA 70002 | Oil & Gas Operator | Jan 2020 |
| 29622 | Upstream Properties, LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2024 |
| 29623 | Upstream Resource Partners, LLC | Palestine, TX 75803 | Oil Operator | Apr 2024 |
| 29624 | Uptex Operating Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2011 |
| 29625 | Uptex Operating, L.P. | Dallas, TX 75201 | Oil & Gas Operator | May 2010 |
| 29626 | Upton Resources U.S.A. Inc. | | Oil & Gas Operator | Oct 2013 |
| 29627 | Uranus, Inc. | Kansas City, MO 64112 | Oil Operator | Jan 2000 |
| 29628 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Apr 2024 |
| 29629 | Urroz Oil & Gas LLC | Evanston, WY 82931 | Oil & Gas Operator | Jun 2020 |
| 29630 | Ursa Major (Crow Og), LLC | Billings, MT 59101 | Gas Operator | Aug 2017 |
| 29631 | Ursa Operating Company LLC | Denver, CO 80265 | Oil & Gas Operator | Dec 2020 |
| 29632 | Ursus Oil And Gas | Tyler, TX 75703 | Oil & Gas Operator | Apr 2024 |
| 29633 | Us Ecology Winnie, LLC | Winnie, TX 77665 | Oil Operator | Apr 2024 |
| 29634 | Us Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Dec 2021 |
| 29635 | Us Energy Dev Corp | Getzville, NY 14068-1558 | Oil & Gas Operator | Dec 2021 |
| 29636 | Us Energy Exploration Corp | Rural Valley, PA 16249 | Oil & Gas Operator | Dec 2023 |
| 29637 | Us Energy Holdings, LLC | Richardson, TX 75080 | Oil & Gas Operator | Apr 2024 |
| 29638 | Us Energy Oh LLC | Rural Valley, PA 16249 | Oil & Gas Operator | Dec 2022 |
| 29639 | Us Gypsum Co | Oakfield, NY 14125-9722 | Gas Operator | Dec 2005 |
| 29640 | Us Liquids Of La, LTD | | Oil Operator | Jun 2002 |
| 29641 | Us Oil & Gas Inc | Marietta, OH 45750 | Oil & Gas Operator | Feb 2024 |
| 29642 | Us Oil Resources LLC | Lakewood, CO 80123 | Oil Operator | Dec 2023 |
| 29643 | Us Ore Corporation | Pacific Beach, CA 92109 | Oil Operator | Feb 2014 |
| 29644 | Us. Fuels, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 29645 | USA Energy LLC | Lance Creek, WY 82222 | Oil & Gas Operator | Nov 2023 |
| 29646 | USA Exploration & Production LLC | Mills, WY 82644 | Oil & Gas Operator | Sep 2012 |
| 29647 | USA Superior Energy LLC | Houston, TX 77077 | Oil Operator | Mar 2010 |
| 29648 | USA Tubulars, Inc. | Valley Spring, TX 76885 | Oil & Gas Operator | Dec 1995 |
| 29649 | Uscan Oil Inc | Oil City, PA 16301-1412 | Oil & Gas Operator | Dec 1991 |
| 29650 | Usedc Okc LLC | | Oil & Gas Operator | May 2018 |
| 29651 | Usfg Oil & Gas, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2005 |
| 29652 | Usins Oil Compan | | Oil Operator | Jan 1993 |
| 29653 | Usx Operating Co., Inc. | Barnstall, OK 74002 | Oil & Gas Operator | Apr 2017 |
| 29654 | Utah Gas Op LTD | Rangely, CO 81648 | Oil & Gas Operator | Feb 2024 |
| 29655 | Utah Oil LLC | Rantoul, KS 66079 | Oil Operator | Dec 2023 |
| 29656 | Utah-Westar DRL Ventures | Dallas, TX 75201 | Oil & Gas Operator | Nov 1987 |
| 29657 | Ute Energy Upstream Holdings LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2012 |
| 29658 | Utex Oil Company | Elko, NV 89803 | Oil & Gas Operator | Dec 1988 |
| 29659 | Utica Resource Operating LLC | Marietta, OH 45750 | Oil & Gas Operator | Sep 2023 |
| 29660 | Utility Ventures Company | Pasadena, TX 77504 | Oil & Gas Operator | Apr 2024 |
| 29661 | Utoco, LTD. | Midland, TX 79704 | Oil Operator | Apr 2024 |
| 29662 | Uvalde Energy Co. | Austin, TX 78747 | Oil & Gas Operator | Nov 1994 |
| 29663 | V & F Oil Company, A General Partnership | Hays, KS 67601 | Oil Operator | Dec 2023 |
| 29664 | V & H Oil, L.P. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2024 |
| 29665 | V & R Oil | | Oil Operator | Dec 2023 |
| 29666 | V & R Production, Inc | La Plata, NM 87418 | Oil & Gas Operator | Oct 2006 |
| 29667 | V A Resources LLC | Casper, WY 82601 | Oil Operator | Apr 2016 |
| 29668 | V C P Michigan, LLC | | Oil & Gas Operator | Feb 2024 |
| 29669 | V L Pittman PC & Producer, Inc | | Oil & Gas Operator | Jul 1989 |
| 29670 | V S Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Apr 2024 |
| 29671 | V-F Petroleum Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 29672 | V-T DRLG Co | | Oil Operator | Dec 2022 |
| 29673 | V. E. Karnes | | Oil Operator | Jun 1989 |
| 29674 | V. Francis Weigel Family Partnership LLC | Gorham, KS 67640 | Oil Operator | Dec 2023 |
| 29675 | V. H. Brumley | | Oil Operator | Jul 1994 |
| 29676 | V. Monta Currie, Jr. | | Oil Operator | Jun 2007 |
| 29677 | V. R. Oil Co. | | Oil Operator | Nov 2023 |
| 29678 | V/J Oil Company | Yancey, TX 78886 | Oil & Gas Operator | Oct 2015 |
| 29679 | Vaalco Energy (USA), Inc. | Houston, TX 77042 | Oil & Gas Operator | Dec 2016 |
| 29680 | Vac Petroleum Co | | Oil Operator | Dec 1990 |
| 29681 | Vac-U-Lift Production Co.,Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | Apr 2024 |
| 29682 | Vaca Energy LLC | | Oil & Gas Operator | Nov 2023 |
| 29683 | Vaca Operating Company LLC | Pacific PLSDS, CA 90272 | Oil & Gas Operator | Aug 2017 |
| 29684 | Vaco Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2003 |
| 29685 | Vail Energy/Enma | | Oil Operator | Oct 1987 |
| 29686 | Val Energy, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2023 |
| 29687 | Valancy Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 29688 | Valar Petroleum Inc | Houston, TX 77069 | Oil & Gas Operator | May 2006 |
| 29689 | Vale Petroleum Corporation | Houston, TX 77042 | Gas Operator | Jan 1995 |
| 29690 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Apr 2024 |
| 29691 | Valentine Oil & Gas, L.C. | Carmine, TX 78932 | Oil Operator | Nov 2018 |
| 29692 | Valentine Oil Properties | Lowell, OH 45744 | Oil & Gas Operator | Dec 1997 |
| 29693 | Valera Oil Company | Kingsland, TX 78639 | Oil & Gas Operator | Apr 2000 |
| 29694 | Valerius, Inc. & Zine, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jul 1994 |
| 29695 | Valerius, Robert D. Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Aug 2003 |
| 29696 | Valero Marketing & Supply Co | San Antonio, TX 78269-6000 | Oil & Gas Operator | Sep 2023 |
| 29697 | Valero Producing Company | | Oil Operator | Sep 1987 |
| 29698 | Valiant Oil & Inv Co | | Oil & Gas Operator | Dec 2023 |
| 29699 | Valid Energy Company | | Oil & Gas Operator | Nov 2023 |
| 29700 | Validus NRG Aquilas Assetco LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2022 |